28
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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58
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12 static void ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r);
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13 static void ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r);
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14 static void ngx_http_upstream_check_broken_connection(ngx_http_request_t *r,
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15 ngx_event_t *ev);
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28
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16 static void ngx_http_upstream_connect(ngx_http_request_t *r,
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36
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17 ngx_http_upstream_t *u);
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58
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18 static ngx_int_t ngx_http_upstream_reinit(ngx_http_request_t *r,
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36
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19 ngx_http_upstream_t *u);
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28
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20 static void ngx_http_upstream_send_request(ngx_http_request_t *r,
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36
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21 ngx_http_upstream_t *u);
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28
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22 static void ngx_http_upstream_send_request_handler(ngx_event_t *wev);
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23 static void ngx_http_upstream_process_header(ngx_event_t *rev);
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24 static void ngx_http_upstream_send_response(ngx_http_request_t *r,
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36
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25 ngx_http_upstream_t *u);
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130
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26 static void
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27 ngx_http_upstream_process_non_buffered_downstream(ngx_http_request_t *r);
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28 static void ngx_http_upstream_process_non_buffered_body(ngx_event_t *ev);
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29 static ngx_int_t ngx_http_upstream_non_buffered_filter_init(void *data);
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30 static ngx_int_t ngx_http_upstream_non_buffered_filter(void *data,
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31 ssize_t bytes);
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58
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32 static void ngx_http_upstream_process_downstream(ngx_http_request_t *r);
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28
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33 static void ngx_http_upstream_process_body(ngx_event_t *ev);
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34 static void ngx_http_upstream_dummy_handler(ngx_event_t *wev);
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35 static void ngx_http_upstream_next(ngx_http_request_t *r,
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36
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36 ngx_http_upstream_t *u, ngx_uint_t ft_type);
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118
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37 static void ngx_http_upstream_cleanup(void *data);
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28
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38 static void ngx_http_upstream_finalize_request(ngx_http_request_t *r,
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36
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39 ngx_http_upstream_t *u, ngx_int_t rc);
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28
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40
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58
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41 static ngx_int_t ngx_http_upstream_process_header_line(ngx_http_request_t *r,
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42 ngx_table_elt_t *h, ngx_uint_t offset);
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43 static ngx_int_t
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44 ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
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45 ngx_table_elt_t *h, ngx_uint_t offset);
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46 static ngx_int_t ngx_http_upstream_ignore_header_line(ngx_http_request_t *r,
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47 ngx_table_elt_t *h, ngx_uint_t offset);
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76
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48 static ngx_int_t ngx_http_upstream_process_limit_rate(ngx_http_request_t *r,
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49 ngx_table_elt_t *h, ngx_uint_t offset);
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198
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50 static ngx_int_t ngx_http_upstream_process_buffering(ngx_http_request_t *r,
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58
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51 ngx_table_elt_t *h, ngx_uint_t offset);
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198
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52 static ngx_int_t ngx_http_upstream_copy_header_line(ngx_http_request_t *r,
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58
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53 ngx_table_elt_t *h, ngx_uint_t offset);
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54 static ngx_int_t
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55 ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r,
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56 ngx_table_elt_t *h, ngx_uint_t offset);
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57 static ngx_int_t ngx_http_upstream_copy_content_type(ngx_http_request_t *r,
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58 ngx_table_elt_t *h, ngx_uint_t offset);
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59 static ngx_int_t ngx_http_upstream_copy_content_length(ngx_http_request_t *r,
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60 ngx_table_elt_t *h, ngx_uint_t offset);
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61 static ngx_int_t ngx_http_upstream_rewrite_location(ngx_http_request_t *r,
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62 ngx_table_elt_t *h, ngx_uint_t offset);
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63 static ngx_int_t ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r,
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64 ngx_table_elt_t *h, ngx_uint_t offset);
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65 #if (NGX_HTTP_GZIP)
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66 static ngx_int_t ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r,
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67 ngx_table_elt_t *h, ngx_uint_t offset);
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68 #endif
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69
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28
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70 static size_t ngx_http_upstream_log_status_getlen(ngx_http_request_t *r,
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36
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71 uintptr_t data);
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72 static u_char *ngx_http_upstream_log_status(ngx_http_request_t *r,
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73 u_char *buf, ngx_http_log_op_t *op);
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122
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74 static size_t ngx_http_upstream_log_response_time_getlen(ngx_http_request_t *r,
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75 uintptr_t data);
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112
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76 static u_char *ngx_http_upstream_log_response_time(ngx_http_request_t *r,
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77 u_char *buf, ngx_http_log_op_t *op);
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28
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78
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58
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79 static u_char *ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf,
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80 size_t len);
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122
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81
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82 static ngx_int_t ngx_http_upstream_add_variables(ngx_conf_t *cf);
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83 static ngx_int_t ngx_http_upstream_status_variable(ngx_http_request_t *r,
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84 ngx_http_variable_value_t *v, uintptr_t data);
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85 static ngx_int_t ngx_http_upstream_response_time_variable(ngx_http_request_t *r,
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86 ngx_http_variable_value_t *v, uintptr_t data);
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87
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200
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88 static char *ngx_http_upstream(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy);
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89 static char *ngx_http_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd,
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90 void *conf);
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91
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58
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92 static void *ngx_http_upstream_create_main_conf(ngx_conf_t *cf);
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200
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93 static char *ngx_http_upstream_init_main_conf(ngx_conf_t *cf, void *conf);
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58
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94
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126
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95 #if (NGX_HTTP_SSL)
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140
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96 static void ngx_http_upstream_ssl_init_connection(ngx_http_request_t *,
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97 ngx_http_upstream_t *u, ngx_connection_t *c);
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126
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98 static void ngx_http_upstream_ssl_handshake(ngx_connection_t *c);
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99 static void ngx_http_upstream_ssl_shutdown(ngx_connection_t *c,
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100 ngx_peer_t *peer);
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101 #endif
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102
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58
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103
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104 ngx_http_upstream_header_t ngx_http_upstream_headers_in[] = {
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105
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106 { ngx_string("Status"),
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107 ngx_http_upstream_process_header_line,
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108 offsetof(ngx_http_upstream_headers_in_t, status),
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198
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109 ngx_http_upstream_copy_header_line, 0, 0 },
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58
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110
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111 { ngx_string("Content-Type"),
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112 ngx_http_upstream_process_header_line,
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113 offsetof(ngx_http_upstream_headers_in_t, content_type),
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64
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114 ngx_http_upstream_copy_content_type, 0, 0 },
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58
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115
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116 { ngx_string("Content-Length"),
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117 ngx_http_upstream_process_header_line,
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118 offsetof(ngx_http_upstream_headers_in_t, content_length),
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64
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119 ngx_http_upstream_copy_content_length, 0, 0 },
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58
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120
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121 { ngx_string("Date"),
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122 ngx_http_upstream_process_header_line,
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123 offsetof(ngx_http_upstream_headers_in_t, date),
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198
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124 ngx_http_upstream_copy_header_line,
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125 offsetof(ngx_http_headers_out_t, date), 0 },
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58
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126
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127 { ngx_string("Server"),
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128 ngx_http_upstream_process_header_line,
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129 offsetof(ngx_http_upstream_headers_in_t, server),
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198
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130 ngx_http_upstream_copy_header_line,
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131 offsetof(ngx_http_headers_out_t, server), 0 },
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58
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132
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78
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133 { ngx_string("WWW-Authenticate"),
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134 ngx_http_upstream_process_header_line,
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135 offsetof(ngx_http_upstream_headers_in_t, www_authenticate),
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136 ngx_http_upstream_copy_header_line, 0, 0 },
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137
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58
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138 { ngx_string("Location"),
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139 ngx_http_upstream_ignore_header_line, 0,
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64
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140 ngx_http_upstream_rewrite_location, 0, 0 },
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58
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141
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142 { ngx_string("Refresh"),
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143 ngx_http_upstream_ignore_header_line, 0,
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64
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144 ngx_http_upstream_rewrite_refresh, 0, 0 },
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145
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146 { ngx_string("Set-Cookie"),
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147 ngx_http_upstream_ignore_header_line, 0,
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80
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148 ngx_http_upstream_copy_header_line, 0, 1 },
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149
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150 { ngx_string("Content-Disposition"),
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151 ngx_http_upstream_ignore_header_line, 0,
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152 ngx_http_upstream_copy_header_line, 0, 1 },
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58
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153
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154 { ngx_string("Cache-Control"),
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155 ngx_http_upstream_process_multi_header_lines,
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156 offsetof(ngx_http_upstream_headers_in_t, cache_control),
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157 ngx_http_upstream_copy_multi_header_lines,
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64
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158 offsetof(ngx_http_headers_out_t, cache_control), 1 },
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58
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159
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122
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160 { ngx_string("Expires"),
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161 ngx_http_upstream_process_header_line,
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162 offsetof(ngx_http_upstream_headers_in_t, expires),
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163 ngx_http_upstream_copy_header_line,
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164 offsetof(ngx_http_headers_out_t, expires), 1 },
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165
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126
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166 { ngx_string("Accept-Ranges"),
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167 ngx_http_upstream_process_header_line,
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168 offsetof(ngx_http_upstream_headers_in_t, accept_ranges),
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169 ngx_http_upstream_copy_header_line,
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170 offsetof(ngx_http_headers_out_t, accept_ranges), 1 },
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171
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58
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172 { ngx_string("Connection"),
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173 ngx_http_upstream_ignore_header_line, 0,
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64
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174 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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175
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190
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176 { ngx_string("Keep-Alive"),
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177 ngx_http_upstream_ignore_header_line, 0,
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178 ngx_http_upstream_ignore_header_line, 0, 0 },
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179
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58
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180 { ngx_string("X-Powered-By"),
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181 ngx_http_upstream_ignore_header_line, 0,
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198
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182 ngx_http_upstream_copy_header_line, 0, 0 },
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58
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183
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184 { ngx_string("X-Accel-Expires"),
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185 ngx_http_upstream_process_header_line,
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186 offsetof(ngx_http_upstream_headers_in_t, x_accel_expires),
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198
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187 ngx_http_upstream_copy_header_line, 0, 0 },
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64
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188
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189 { ngx_string("X-Accel-Redirect"),
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190 ngx_http_upstream_process_header_line,
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191 offsetof(ngx_http_upstream_headers_in_t, x_accel_redirect),
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192 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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193
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76
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194 { ngx_string("X-Accel-Limit-Rate"),
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195 ngx_http_upstream_process_limit_rate, 0,
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196 ngx_http_upstream_ignore_header_line, 0, 0 },
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197
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198
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198 { ngx_string("X-Accel-Buffering"),
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199 ngx_http_upstream_process_buffering, 0,
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200 ngx_http_upstream_ignore_header_line, 0, 0 },
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201
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58
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202 #if (NGX_HTTP_GZIP)
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203 { ngx_string("Content-Encoding"),
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204 ngx_http_upstream_process_header_line,
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205 offsetof(ngx_http_upstream_headers_in_t, content_encoding),
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64
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206 ngx_http_upstream_copy_content_encoding, 0, 0 },
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58
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207 #endif
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208
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64
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209 { ngx_null_string, NULL, 0, NULL, 0, 0 }
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58
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210 };
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28
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211
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212
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200
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213 static ngx_command_t ngx_http_upstream_commands[] = {
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214
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215 { ngx_string("upstream"),
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216 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1,
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217 ngx_http_upstream,
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218 0,
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219 0,
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220 NULL },
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221
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222 { ngx_string("server"),
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223 NGX_HTTP_UPS_CONF|NGX_CONF_TAKE1,
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224 ngx_http_upstream_server,
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225 NGX_HTTP_SRV_CONF_OFFSET,
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226 0,
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227 NULL },
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228
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229 ngx_null_command
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230 };
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231
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232
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233 static ngx_http_module_t ngx_http_upstream_module_ctx = {
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122
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234 ngx_http_upstream_add_variables, /* preconfiguration */
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235 NULL, /* postconfiguration */
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236
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237 ngx_http_upstream_create_main_conf, /* create main configuration */
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200
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238 ngx_http_upstream_init_main_conf, /* init main configuration */
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239
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240 NULL, /* create server configuration */
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241 NULL, /* merge server configuration */
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242
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243 NULL, /* create location configuration */
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244 NULL /* merge location configuration */
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245 };
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126
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246
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28
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247
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248 ngx_module_t ngx_http_upstream_module = {
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249 NGX_MODULE_V1,
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250 &ngx_http_upstream_module_ctx, /* module context */
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200
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251 ngx_http_upstream_commands, /* module directives */
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252 NGX_HTTP_MODULE, /* module type */
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90
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253 NULL, /* init master */
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254 NULL, /* init module */
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90
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255 NULL, /* init process */
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256 NULL, /* init thread */
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257 NULL, /* exit thread */
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258 NULL, /* exit process */
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259 NULL, /* exit master */
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260 NGX_MODULE_V1_PADDING
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28
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261 };
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262
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263
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132
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264 static ngx_http_log_op_name_t ngx_http_upstream_log_fmt_ops[] = {
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28
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265 { ngx_string("upstream_status"), 0, NULL,
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122
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266 ngx_http_upstream_log_status_getlen,
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267 ngx_http_upstream_log_status },
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268 { ngx_string("upstream_response_time"), 0, NULL,
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269 ngx_http_upstream_log_response_time_getlen,
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270 ngx_http_upstream_log_response_time },
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28
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271 { ngx_null_string, 0, NULL, NULL, NULL }
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272 };
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273
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274
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122
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275 static ngx_http_variable_t ngx_http_upstream_vars[] = {
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276
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186
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277 { ngx_string("upstream_status"), NULL,
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132
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278 ngx_http_upstream_status_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
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122
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279
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186
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280 { ngx_string("upstream_response_time"), NULL,
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132
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281 ngx_http_upstream_response_time_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
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122
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282
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186
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283 { ngx_null_string, NULL, NULL, 0, 0, 0 }
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122
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284 };
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285
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286
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36
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287 void
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288 ngx_http_upstream_init(ngx_http_request_t *r)
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28
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289 {
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112
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290 ngx_time_t *tp;
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58
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291 ngx_connection_t *c;
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118
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292 ngx_http_cleanup_t *cln;
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58
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293 ngx_http_upstream_t *u;
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294 ngx_http_core_loc_conf_t *clcf;
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28
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295
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296 c = r->connection;
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297
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298 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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299 "http init upstream, client timer: %d", c->read->timer_set);
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300
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301 if (c->read->timer_set) {
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302 ngx_del_timer(c->read);
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303 }
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304
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178
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305 u = r->upstream;
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306
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307 if (!r->post_action && !u->conf->ignore_client_abort) {
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164
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308 r->read_event_handler = ngx_http_upstream_rd_check_broken_connection;
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309 r->write_event_handler = ngx_http_upstream_wr_check_broken_connection;
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310 }
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126
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311
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28
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312 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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313
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314 if (!c->write->active) {
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80
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315 if (ngx_add_event(c->write, NGX_WRITE_EVENT, NGX_CLEAR_EVENT)
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316 == NGX_ERROR)
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28
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317 {
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318 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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319 return;
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320 }
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321 }
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322 }
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323
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86
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324 if (r->request_body) {
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325 u->request_bufs = r->request_body->bufs;
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326 }
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58
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327
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86
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328 if (u->create_request(r) != NGX_OK) {
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28
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329 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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330 return;
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331 }
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332
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333 u->peer.log = r->connection->log;
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58
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334 u->saved_log_handler = r->log_handler;
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335 r->log_handler = ngx_http_upstream_log_error;
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336
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337 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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28
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338
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339 u->output.sendfile = r->connection->sendfile;
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340 u->output.pool = r->pool;
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341 u->output.bufs.num = 1;
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58
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342 u->output.bufs.size = clcf->client_body_buffer_size;
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28
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343 u->output.output_filter = ngx_chain_writer;
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344 u->output.filter_ctx = &u->writer;
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345
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346 u->writer.pool = r->pool;
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347
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348 if (ngx_array_init(&u->states, r->pool, u->peer.peers->number,
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118
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349 sizeof(ngx_http_upstream_state_t))
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350 != NGX_OK)
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28
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351 {
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352 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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353 return;
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354 }
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355
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50
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356 u->state = ngx_array_push(&u->states);
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357 if (u->state == NULL) {
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28
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358 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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359 return;
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360 }
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361
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362 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
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363
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112
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364 tp = ngx_timeofday();
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365
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366 u->state->response_time = tp->sec * 1000 + tp->msec;
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367
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142
|
368 cln = ngx_http_cleanup_add(r, 0);
|
118
|
369 if (cln == NULL) {
|
|
370 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
371 return;
|
|
372 }
|
|
373
|
|
374 cln->handler = ngx_http_upstream_cleanup;
|
|
375 cln->data = r;
|
|
376 u->cleanup = &cln->handler;
|
|
377
|
28
|
378 ngx_http_upstream_connect(r, u);
|
|
379 }
|
|
380
|
|
381
|
36
|
382 static void
|
58
|
383 ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r)
|
|
384 {
|
|
385 ngx_http_upstream_check_broken_connection(r, r->connection->read);
|
|
386 }
|
|
387
|
|
388
|
|
389 static void
|
|
390 ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r)
|
|
391 {
|
|
392 ngx_http_upstream_check_broken_connection(r, r->connection->write);
|
|
393 }
|
|
394
|
|
395
|
|
396 static void
|
|
397 ngx_http_upstream_check_broken_connection(ngx_http_request_t *r,
|
|
398 ngx_event_t *ev)
|
28
|
399 {
|
|
400 int n;
|
|
401 char buf[1];
|
126
|
402 ngx_err_t err;
|
28
|
403 ngx_connection_t *c;
|
|
404 ngx_http_upstream_t *u;
|
|
405
|
76
|
406 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ev->log, 0,
|
|
407 "http upstream check client, write event:%d, \"%V\"",
|
|
408 ev->write, &r->uri);
|
28
|
409
|
58
|
410 c = r->connection;
|
32
|
411 u = r->upstream;
|
|
412
|
132
|
413 if (c->error) {
|
76
|
414 ngx_http_upstream_finalize_request(r, u,
|
|
415 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
416 return;
|
|
417 }
|
|
418
|
32
|
419 if (u->peer.connection == NULL) {
|
|
420 return;
|
|
421 }
|
|
422
|
28
|
423 #if (NGX_HAVE_KQUEUE)
|
|
424
|
|
425 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
|
426
|
|
427 if (!ev->pending_eof) {
|
|
428 return;
|
|
429 }
|
|
430
|
|
431 ev->eof = 1;
|
132
|
432 c->error = 1;
|
28
|
433
|
|
434 if (ev->kq_errno) {
|
|
435 ev->error = 1;
|
|
436 }
|
|
437
|
|
438 if (!u->cachable && u->peer.connection) {
|
|
439 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
|
76
|
440 "kevent() reported that client closed prematurely "
|
|
441 "connection, so upstream connection is closed too");
|
28
|
442 ngx_http_upstream_finalize_request(r, u,
|
|
443 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
444 return;
|
|
445 }
|
|
446
|
|
447 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
|
|
448 "kevent() reported that client closed "
|
|
449 "prematurely connection");
|
|
450
|
|
451 if (u->peer.connection == NULL) {
|
|
452 ngx_http_upstream_finalize_request(r, u,
|
|
453 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
454 return;
|
|
455 }
|
|
456
|
|
457 return;
|
|
458 }
|
|
459
|
|
460 #endif
|
|
461
|
|
462 n = recv(c->fd, buf, 1, MSG_PEEK);
|
|
463
|
|
464 err = ngx_socket_errno;
|
|
465
|
|
466 /*
|
|
467 * we do not need to disable the write event because
|
|
468 * that event has NGX_USE_CLEAR_EVENT type
|
|
469 */
|
|
470
|
|
471 if (ev->write && (n >= 0 || err == NGX_EAGAIN)) {
|
|
472 return;
|
|
473 }
|
|
474
|
|
475 if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && ev->active) {
|
|
476 if (ngx_del_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) {
|
|
477 ngx_http_upstream_finalize_request(r, u,
|
|
478 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
479 return;
|
|
480 }
|
|
481 }
|
|
482
|
|
483 if (n > 0) {
|
|
484 return;
|
|
485 }
|
|
486
|
|
487 if (n == -1) {
|
|
488 if (err == NGX_EAGAIN) {
|
|
489 return;
|
|
490 }
|
|
491
|
|
492 ev->error = 1;
|
|
493
|
32
|
494 } else { /* n == 0 */
|
28
|
495 err = 0;
|
|
496 }
|
|
497
|
78
|
498 ev->eof = 1;
|
132
|
499 c->error = 1;
|
78
|
500
|
28
|
501 if (!u->cachable && u->peer.connection) {
|
|
502 ngx_log_error(NGX_LOG_INFO, ev->log, err,
|
|
503 "client closed prematurely connection, "
|
|
504 "so upstream connection is closed too");
|
|
505 ngx_http_upstream_finalize_request(r, u,
|
|
506 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
507 return;
|
|
508 }
|
|
509
|
|
510 ngx_log_error(NGX_LOG_INFO, ev->log, err,
|
|
511 "client closed prematurely connection");
|
|
512
|
|
513 if (u->peer.connection == NULL) {
|
|
514 ngx_http_upstream_finalize_request(r, u,
|
|
515 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
516 return;
|
|
517 }
|
|
518 }
|
|
519
|
|
520
|
36
|
521 static void
|
|
522 ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
28
|
523 {
|
140
|
524 ngx_int_t rc;
|
|
525 ngx_connection_t *c;
|
28
|
526
|
32
|
527 r->connection->log->action = "connecting to upstream";
|
28
|
528
|
|
529 r->connection->single_connection = 0;
|
|
530
|
|
531 rc = ngx_event_connect_peer(&u->peer);
|
|
532
|
|
533 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
534 "http upstream connect: %i", rc);
|
|
535
|
|
536 if (rc == NGX_ERROR) {
|
|
537 ngx_http_upstream_finalize_request(r, u,
|
|
538 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
539 return;
|
|
540 }
|
|
541
|
140
|
542 u->state->peer = &u->peer.peers->peer[u->peer.cur_peer].name;
|
28
|
543
|
92
|
544 if (rc == NGX_BUSY) {
|
|
545 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams");
|
|
546 }
|
|
547
|
|
548 if (rc == NGX_BUSY || rc == NGX_DECLINED) {
|
28
|
549 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
550 return;
|
|
551 }
|
|
552
|
126
|
553 /* rc == NGX_OK || rc == NGX_AGAIN */
|
|
554
|
28
|
555 c = u->peer.connection;
|
|
556
|
|
557 c->data = r;
|
140
|
558
|
58
|
559 c->write->handler = ngx_http_upstream_send_request_handler;
|
|
560 c->read->handler = ngx_http_upstream_process_header;
|
28
|
561
|
|
562 c->sendfile = r->connection->sendfile;
|
|
563
|
|
564 c->pool = r->pool;
|
|
565 c->read->log = c->write->log = c->log = r->connection->log;
|
|
566
|
|
567 /* init or reinit the ngx_output_chain() and ngx_chain_writer() contexts */
|
|
568
|
|
569 u->writer.out = NULL;
|
|
570 u->writer.last = &u->writer.out;
|
|
571 u->writer.connection = c;
|
|
572 u->writer.limit = 0;
|
|
573
|
|
574 if (u->request_sent) {
|
58
|
575 if (ngx_http_upstream_reinit(r, u) != NGX_OK) {
|
|
576 ngx_http_upstream_finalize_request(r, u,
|
|
577 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
578 return;
|
|
579 }
|
28
|
580 }
|
|
581
|
146
|
582 if (r->request_body && r->request_body->temp_file && r == r->main) {
|
122
|
583
|
|
584 /*
|
|
585 * the r->request_body->buf can be reused for one request only,
|
|
586 * the subrequests should allocate their own temporay bufs
|
|
587 */
|
|
588
|
|
589 u->output.free = ngx_alloc_chain_link(r->pool);
|
|
590 if (u->output.free == NULL) {
|
|
591 ngx_http_upstream_finalize_request(r, u,
|
|
592 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
593 return;
|
28
|
594 }
|
122
|
595
|
|
596 u->output.free->buf = r->request_body->buf;
|
|
597 u->output.free->next = NULL;
|
|
598 u->output.allocated = 1;
|
|
599
|
|
600 r->request_body->buf->pos = r->request_body->buf->start;
|
|
601 r->request_body->buf->last = r->request_body->buf->start;
|
|
602 r->request_body->buf->tag = u->output.tag;
|
28
|
603 }
|
|
604
|
|
605 u->request_sent = 0;
|
|
606
|
|
607 if (rc == NGX_AGAIN) {
|
|
608 ngx_add_timer(c->write, u->conf->connect_timeout);
|
|
609 return;
|
|
610 }
|
|
611
|
126
|
612 #if (NGX_HTTP_SSL)
|
|
613
|
140
|
614 if (u->conf->ssl && c->ssl == NULL) {
|
|
615 ngx_http_upstream_ssl_init_connection(r, u, c);
|
126
|
616 return;
|
|
617 }
|
|
618
|
|
619 #endif
|
|
620
|
28
|
621 ngx_http_upstream_send_request(r, u);
|
|
622 }
|
|
623
|
|
624
|
126
|
625 #if (NGX_HTTP_SSL)
|
|
626
|
|
627 static void
|
140
|
628 ngx_http_upstream_ssl_init_connection(ngx_http_request_t *r,
|
|
629 ngx_http_upstream_t *u, ngx_connection_t *c)
|
|
630 {
|
|
631 ngx_int_t rc;
|
|
632 ngx_peer_t *peer;
|
|
633
|
|
634 if (ngx_ssl_create_connection(u->conf->ssl, c,
|
|
635 NGX_SSL_BUFFER|NGX_SSL_CLIENT)
|
|
636 == NGX_ERROR)
|
|
637 {
|
|
638 ngx_http_upstream_finalize_request(r, u,
|
|
639 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
640 return;
|
|
641 }
|
|
642
|
|
643 c->sendfile = 0;
|
168
|
644 u->output.sendfile = 0;
|
140
|
645
|
|
646 peer = &u->peer.peers->peer[u->peer.cur_peer];
|
|
647
|
|
648 if (ngx_ssl_set_session(c, peer->ssl_session) != NGX_OK) {
|
|
649 ngx_http_upstream_finalize_request(r, u,
|
|
650 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
651 return;
|
|
652 }
|
|
653
|
190
|
654 r->connection->log->action = "SSL handshaking to upstream";
|
|
655
|
140
|
656 rc = ngx_ssl_handshake(c);
|
|
657
|
|
658 if (rc == NGX_AGAIN) {
|
|
659 c->ssl->handler = ngx_http_upstream_ssl_handshake;
|
|
660 return;
|
|
661 }
|
|
662
|
|
663 ngx_http_upstream_ssl_handshake(c);
|
|
664 }
|
|
665
|
|
666
|
|
667 static void
|
126
|
668 ngx_http_upstream_ssl_handshake(ngx_connection_t *c)
|
|
669 {
|
|
670 ngx_http_request_t *r;
|
|
671 ngx_http_upstream_t *u;
|
|
672
|
|
673 r = c->data;
|
|
674 u = r->upstream;
|
|
675
|
|
676 if (c->ssl->handshaked) {
|
|
677
|
|
678 c->write->handler = ngx_http_upstream_send_request_handler;
|
|
679 c->read->handler = ngx_http_upstream_process_header;
|
|
680
|
|
681 ngx_http_upstream_send_request(r, u);
|
|
682
|
|
683 return;
|
|
684 }
|
|
685
|
|
686 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
687
|
|
688 }
|
|
689
|
|
690 #endif
|
|
691
|
|
692
|
58
|
693 static ngx_int_t
|
36
|
694 ngx_http_upstream_reinit(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
28
|
695 {
|
|
696 ngx_chain_t *cl;
|
|
697
|
58
|
698 if (u->reinit_request(r) != NGX_OK) {
|
|
699 return NGX_ERROR;
|
|
700 }
|
|
701
|
|
702 ngx_memzero(&r->upstream->headers_in,
|
|
703 sizeof(ngx_http_upstream_headers_in_t));
|
|
704
|
|
705 if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8,
|
140
|
706 sizeof(ngx_table_elt_t))
|
|
707 != NGX_OK)
|
58
|
708 {
|
|
709 return NGX_ERROR;
|
28
|
710 }
|
|
711
|
|
712 /* reinit the request chain */
|
126
|
713
|
58
|
714 for (cl = u->request_bufs; cl; cl = cl->next) {
|
28
|
715 cl->buf->pos = cl->buf->start;
|
|
716 cl->buf->file_pos = 0;
|
|
717 }
|
|
718
|
58
|
719 /* reinit the subrequest's ngx_output_chain() context */
|
|
720
|
122
|
721 if (r->request_body && r->request_body->temp_file
|
146
|
722 && r != r->main && u->output.buf)
|
122
|
723 {
|
|
724 u->output.free = ngx_alloc_chain_link(r->pool);
|
|
725 if (u->output.free == NULL) {
|
|
726 return NGX_ERROR;
|
58
|
727 }
|
122
|
728
|
|
729 u->output.free->buf = u->output.buf;
|
|
730 u->output.free->next = NULL;
|
|
731
|
|
732 u->output.buf->pos = u->output.buf->start;
|
|
733 u->output.buf->last = u->output.buf->start;
|
58
|
734 }
|
28
|
735
|
|
736 u->output.buf = NULL;
|
|
737 u->output.in = NULL;
|
|
738 u->output.busy = NULL;
|
126
|
739
|
130
|
740 /* reinit u->buffer */
|
126
|
741
|
28
|
742 #if 0
|
|
743 if (u->cache) {
|
130
|
744 u->buffer.pos = u->buffer.start + u->cache->ctx.header_size;
|
|
745 u->buffer.last = u->buffer.pos;
|
28
|
746
|
|
747 } else {
|
130
|
748 u->buffer.pos = u->buffer.start;
|
|
749 u->buffer.last = u->buffer.start;
|
28
|
750 }
|
|
751 #else
|
58
|
752
|
130
|
753 u->buffer.pos = u->buffer.start;
|
|
754 u->buffer.last = u->buffer.start;
|
58
|
755
|
28
|
756 #endif
|
|
757
|
|
758 /* add one more state */
|
|
759
|
50
|
760 u->state = ngx_array_push(&u->states);
|
|
761 if (u->state == NULL) {
|
58
|
762 return NGX_ERROR;
|
28
|
763 }
|
|
764
|
|
765 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
|
58
|
766
|
|
767 return NGX_OK;
|
28
|
768 }
|
|
769
|
|
770
|
36
|
771 static void
|
|
772 ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
28
|
773 {
|
32
|
774 int rc;
|
|
775 ngx_connection_t *c;
|
126
|
776
|
28
|
777 c = u->peer.connection;
|
|
778
|
|
779 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
780 "http upstream send request");
|
|
781
|
|
782 #if (NGX_HAVE_KQUEUE)
|
|
783
|
|
784 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT)
|
|
785 && !u->request_sent
|
|
786 && c->write->pending_eof)
|
|
787 {
|
86
|
788 (void) ngx_connection_error(c, c->write->kq_errno,
|
|
789 "kevent() reported that connect() failed");
|
28
|
790 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
791 return;
|
|
792 }
|
|
793
|
|
794 #endif
|
|
795
|
32
|
796 c->log->action = "sending request to upstream";
|
28
|
797
|
58
|
798 rc = ngx_output_chain(&u->output, u->request_sent ? NULL : u->request_bufs);
|
28
|
799
|
|
800 u->request_sent = 1;
|
|
801
|
|
802 if (rc == NGX_ERROR) {
|
|
803 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
804 return;
|
|
805 }
|
|
806
|
|
807 if (c->write->timer_set) {
|
|
808 ngx_del_timer(c->write);
|
|
809 }
|
|
810
|
|
811 if (rc == NGX_AGAIN) {
|
|
812 ngx_add_timer(c->write, u->conf->send_timeout);
|
|
813
|
|
814 if (ngx_handle_write_event(c->write, u->conf->send_lowat) == NGX_ERROR)
|
|
815 {
|
|
816 ngx_http_upstream_finalize_request(r, u,
|
|
817 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
818 return;
|
|
819 }
|
|
820
|
|
821 return;
|
|
822 }
|
|
823
|
|
824 /* rc == NGX_OK */
|
|
825
|
|
826 if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) {
|
|
827 if (ngx_tcp_push(c->fd) == NGX_ERROR) {
|
|
828 ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno,
|
|
829 ngx_tcp_push_n " failed");
|
|
830 ngx_http_upstream_finalize_request(r, u,
|
|
831 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
126
|
832 return;
|
28
|
833 }
|
|
834
|
|
835 c->tcp_nopush = NGX_TCP_NOPUSH_UNSET;
|
|
836 }
|
126
|
837
|
28
|
838 ngx_add_timer(c->read, u->conf->read_timeout);
|
|
839
|
|
840 #if 1
|
|
841 if (c->read->ready) {
|
126
|
842
|
28
|
843 /* post aio operation */
|
|
844
|
|
845 /*
|
|
846 * TODO comment
|
|
847 * although we can post aio operation just in the end
|
|
848 * of ngx_http_upstream_connect() CHECK IT !!!
|
|
849 * it's better to do here because we postpone header buffer allocation
|
|
850 */
|
|
851
|
|
852 ngx_http_upstream_process_header(c->read);
|
|
853 return;
|
|
854 }
|
|
855 #endif
|
|
856
|
58
|
857 c->write->handler = ngx_http_upstream_dummy_handler;
|
28
|
858
|
58
|
859 if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
|
28
|
860 ngx_http_upstream_finalize_request(r, u,
|
|
861 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
862 return;
|
|
863 }
|
|
864 }
|
|
865
|
|
866
|
36
|
867 static void
|
|
868 ngx_http_upstream_send_request_handler(ngx_event_t *wev)
|
28
|
869 {
|
|
870 ngx_connection_t *c;
|
|
871 ngx_http_request_t *r;
|
|
872 ngx_http_upstream_t *u;
|
|
873
|
|
874 c = wev->data;
|
|
875 r = c->data;
|
|
876 u = r->upstream;
|
|
877
|
|
878 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
879 "http upstream send request handler");
|
|
880
|
|
881 if (wev->timedout) {
|
|
882 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
883 return;
|
|
884 }
|
|
885
|
140
|
886 #if (NGX_HTTP_SSL)
|
|
887
|
|
888 if (u->conf->ssl && c->ssl == NULL) {
|
|
889 ngx_http_upstream_ssl_init_connection(r, u, c);
|
|
890 return;
|
|
891 }
|
|
892
|
|
893 #endif
|
|
894
|
200
|
895 if (u->header_sent) {
|
|
896 wev->handler = ngx_http_upstream_dummy_handler;
|
|
897
|
|
898 (void) ngx_handle_write_event(wev, 0);
|
|
899
|
|
900 return;
|
|
901 }
|
|
902
|
28
|
903 ngx_http_upstream_send_request(r, u);
|
|
904 }
|
|
905
|
|
906
|
36
|
907 static void
|
|
908 ngx_http_upstream_process_header(ngx_event_t *rev)
|
28
|
909 {
|
64
|
910 ssize_t n;
|
|
911 ngx_int_t rc;
|
122
|
912 ngx_str_t *uri, args;
|
198
|
913 ngx_uint_t i, flags;
|
64
|
914 ngx_list_part_t *part;
|
|
915 ngx_table_elt_t *h;
|
|
916 ngx_connection_t *c;
|
|
917 ngx_http_request_t *r;
|
|
918 ngx_http_upstream_t *u;
|
|
919 ngx_http_err_page_t *err_page;
|
|
920 ngx_http_core_loc_conf_t *clcf;
|
|
921 ngx_http_upstream_header_t *hh;
|
|
922 ngx_http_upstream_main_conf_t *umcf;
|
28
|
923
|
|
924 c = rev->data;
|
|
925 r = c->data;
|
|
926 u = r->upstream;
|
|
927
|
|
928 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
|
32
|
929 "http upstream process header");
|
28
|
930
|
32
|
931 c->log->action = "reading response header from upstream";
|
28
|
932
|
|
933 if (rev->timedout) {
|
|
934 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
935 return;
|
|
936 }
|
126
|
937
|
130
|
938 if (u->buffer.start == NULL) {
|
|
939 u->buffer.start = ngx_palloc(r->pool, u->conf->buffer_size);
|
|
940 if (u->buffer.start == NULL) {
|
28
|
941 ngx_http_upstream_finalize_request(r, u,
|
|
942 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
943 return;
|
|
944 }
|
|
945
|
130
|
946 u->buffer.pos = u->buffer.start;
|
|
947 u->buffer.last = u->buffer.start;
|
|
948 u->buffer.end = u->buffer.start + u->conf->buffer_size;
|
|
949 u->buffer.temporary = 1;
|
|
950
|
|
951 u->buffer.tag = u->output.tag;
|
28
|
952
|
58
|
953 if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8,
|
130
|
954 sizeof(ngx_table_elt_t))
|
|
955 != NGX_OK)
|
58
|
956 {
|
|
957 ngx_http_upstream_finalize_request(r, u,
|
|
958 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
959 return;
|
|
960 }
|
|
961
|
28
|
962 #if 0
|
|
963 if (u->cache) {
|
130
|
964 u->buffer.pos += u->cache->ctx.header_size;
|
|
965 u->buffer.last = u->buffer.pos;
|
28
|
966 }
|
|
967 #endif
|
|
968 }
|
|
969
|
130
|
970 n = u->peer.connection->recv(u->peer.connection, u->buffer.last,
|
|
971 u->buffer.end - u->buffer.last);
|
28
|
972
|
|
973 if (n == NGX_AGAIN) {
|
|
974 #if 0
|
|
975 ngx_add_timer(rev, u->read_timeout);
|
|
976 #endif
|
|
977
|
|
978 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
979 ngx_http_upstream_finalize_request(r, u,
|
|
980 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
981 return;
|
|
982 }
|
|
983
|
|
984 return;
|
|
985 }
|
|
986
|
|
987 if (n == 0) {
|
|
988 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
989 "upstream prematurely closed connection");
|
|
990 }
|
|
991
|
|
992 if (n == NGX_ERROR || n == 0) {
|
|
993 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
994 return;
|
|
995 }
|
|
996
|
130
|
997 u->buffer.last += n;
|
28
|
998
|
|
999 #if 0
|
|
1000 u->valid_header_in = 0;
|
|
1001
|
|
1002 u->peer.cached = 0;
|
|
1003 #endif
|
|
1004
|
|
1005 rc = u->process_header(r);
|
|
1006
|
|
1007 if (rc == NGX_AGAIN) {
|
|
1008 #if 0
|
|
1009 ngx_add_timer(rev, u->read_timeout);
|
|
1010 #endif
|
|
1011
|
130
|
1012 if (u->buffer.pos == u->buffer.end) {
|
28
|
1013 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
1014 "upstream sent too big header");
|
|
1015
|
|
1016 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
1017 return;
|
|
1018 }
|
|
1019
|
|
1020 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
1021 ngx_http_upstream_finalize_request(r, u,
|
|
1022 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1023 return;
|
|
1024 }
|
|
1025
|
|
1026 return;
|
|
1027 }
|
|
1028
|
|
1029 if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) {
|
|
1030 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
1031 return;
|
|
1032 }
|
|
1033
|
|
1034 if (rc == NGX_ERROR || rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
1035 ngx_http_upstream_finalize_request(r, u,
|
|
1036 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1037 return;
|
|
1038 }
|
|
1039
|
|
1040 /* rc == NGX_OK */
|
|
1041
|
78
|
1042 if (u->headers_in.status_n == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
58
|
1043
|
|
1044 if (u->peer.tries > 1
|
|
1045 && (u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_500))
|
|
1046 {
|
|
1047 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_500);
|
|
1048 return;
|
|
1049 }
|
|
1050
|
|
1051 #if (NGX_HTTP_CACHE)
|
|
1052
|
|
1053 if (u->peer.tries == 0
|
|
1054 && u->stale
|
|
1055 && (u->conf->use_stale & NGX_HTTP_UPSTREAM_FT_HTTP_500))
|
|
1056 {
|
|
1057 ngx_http_upstream_finalize_request(r, u,
|
78
|
1058 ngx_http_send_cached_response(r));
|
58
|
1059 return;
|
|
1060 }
|
|
1061
|
|
1062 #endif
|
|
1063 }
|
|
1064
|
146
|
1065 if (u->headers_in.status_n == NGX_HTTP_NOT_FOUND) {
|
|
1066
|
|
1067 if (u->peer.tries > 1
|
|
1068 && u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_404)
|
|
1069 {
|
|
1070 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_404);
|
|
1071 return;
|
|
1072 }
|
|
1073
|
|
1074 if (u->conf->redirect_404) {
|
|
1075 rc = (r->err_ctx == NULL) ? 404 : 204;
|
|
1076 ngx_http_upstream_finalize_request(r, u, rc);
|
|
1077 return;
|
|
1078 }
|
58
|
1079 }
|
|
1080
|
|
1081
|
78
|
1082 if (u->headers_in.status_n >= NGX_HTTP_BAD_REQUEST
|
36
|
1083 && u->conf->redirect_errors
|
|
1084 && r->err_ctx == NULL)
|
|
1085 {
|
|
1086 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
1087
|
|
1088 if (clcf->error_pages) {
|
|
1089
|
|
1090 err_page = clcf->error_pages->elts;
|
|
1091 for (i = 0; i < clcf->error_pages->nelts; i++) {
|
78
|
1092 if (err_page[i].status == (ngx_int_t) u->headers_in.status_n) {
|
|
1093
|
|
1094 if (u->headers_in.status_n == NGX_HTTP_UNAUTHORIZED) {
|
|
1095
|
|
1096 r->headers_out.www_authenticate =
|
|
1097 ngx_list_push(&r->headers_out.headers);
|
|
1098
|
|
1099 if (r->headers_out.www_authenticate == NULL) {
|
|
1100 ngx_http_upstream_finalize_request(r, u,
|
|
1101 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1102 return;
|
|
1103 }
|
|
1104
|
126
|
1105 *r->headers_out.www_authenticate =
|
78
|
1106 *u->headers_in.www_authenticate;
|
|
1107 }
|
|
1108
|
36
|
1109 ngx_http_upstream_finalize_request(r, u,
|
78
|
1110 u->headers_in.status_n);
|
36
|
1111 return;
|
|
1112 }
|
|
1113 }
|
|
1114 }
|
|
1115 }
|
|
1116
|
64
|
1117 if (r->upstream->headers_in.x_accel_redirect) {
|
|
1118 ngx_http_upstream_finalize_request(r, u, NGX_DECLINED);
|
|
1119
|
|
1120 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
|
|
1121
|
|
1122 part = &r->upstream->headers_in.headers.part;
|
|
1123 h = part->elts;
|
|
1124
|
|
1125 for (i = 0; /* void */; i++) {
|
|
1126
|
|
1127 if (i >= part->nelts) {
|
|
1128 if (part->next == NULL) {
|
|
1129 break;
|
|
1130 }
|
126
|
1131
|
64
|
1132 part = part->next;
|
|
1133 h = part->elts;
|
|
1134 i = 0;
|
|
1135 }
|
|
1136
|
198
|
1137 hh = ngx_hash_find(&umcf->headers_in_hash, h[i].hash,
|
|
1138 h[i].lowcase_key, h[i].key.len);
|
|
1139
|
|
1140 if (hh && hh->redirect) {
|
|
1141 if (hh->copy_handler(r, &h[i], hh->conf) != NGX_OK) {
|
64
|
1142 ngx_http_upstream_finalize_request(r, u,
|
|
1143 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1144 return;
|
|
1145 }
|
|
1146 }
|
|
1147 }
|
|
1148
|
122
|
1149 uri = &r->upstream->headers_in.x_accel_redirect->value;
|
|
1150 args.len = 0;
|
|
1151 args.data = NULL;
|
|
1152 flags = 0;
|
|
1153
|
|
1154 if (ngx_http_parse_unsafe_uri(r, uri, &args, &flags) != NGX_OK) {
|
|
1155 ngx_http_upstream_finalize_request(r, u, NGX_HTTP_NOT_FOUND);
|
|
1156 return;
|
|
1157 }
|
|
1158
|
|
1159 if (flags & NGX_HTTP_ZERO_IN_URI) {
|
|
1160 r->zero_in_uri = 1;
|
|
1161 }
|
|
1162
|
202
|
1163 if (r->method != NGX_HTTP_HEAD) {
|
|
1164 r->method = NGX_HTTP_GET;
|
|
1165 }
|
|
1166
|
122
|
1167 ngx_http_internal_redirect(r, uri, &args);
|
64
|
1168 return;
|
|
1169 }
|
|
1170
|
28
|
1171 ngx_http_upstream_send_response(r, u);
|
|
1172 }
|
|
1173
|
|
1174
|
36
|
1175 static void
|
|
1176 ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
28
|
1177 {
|
132
|
1178 int tcp_nodelay;
|
130
|
1179 ssize_t size;
|
58
|
1180 ngx_int_t rc;
|
198
|
1181 ngx_uint_t i;
|
58
|
1182 ngx_list_part_t *part;
|
|
1183 ngx_table_elt_t *h;
|
|
1184 ngx_event_pipe_t *p;
|
132
|
1185 ngx_connection_t *c;
|
112
|
1186 ngx_pool_cleanup_t *cl;
|
|
1187 ngx_pool_cleanup_file_t *clf;
|
58
|
1188 ngx_http_core_loc_conf_t *clcf;
|
|
1189 ngx_http_upstream_header_t *hh;
|
|
1190 ngx_http_upstream_main_conf_t *umcf;
|
|
1191
|
|
1192 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
|
|
1193
|
|
1194 part = &r->upstream->headers_in.headers.part;
|
|
1195 h = part->elts;
|
|
1196
|
|
1197 for (i = 0; /* void */; i++) {
|
28
|
1198
|
58
|
1199 if (i >= part->nelts) {
|
|
1200 if (part->next == NULL) {
|
|
1201 break;
|
|
1202 }
|
126
|
1203
|
58
|
1204 part = part->next;
|
|
1205 h = part->elts;
|
|
1206 i = 0;
|
|
1207 }
|
|
1208
|
198
|
1209 if (ngx_hash_find(&u->conf->hide_headers_hash, h[i].hash,
|
|
1210 h[i].lowcase_key, h[i].key.len))
|
58
|
1211 {
|
198
|
1212 continue;
|
|
1213 }
|
|
1214
|
|
1215 hh = ngx_hash_find(&umcf->headers_in_hash, h[i].hash,
|
|
1216 h[i].lowcase_key, h[i].key.len);
|
|
1217
|
|
1218 if (hh) {
|
|
1219 if (hh->copy_handler(r, &h[i], hh->conf) != NGX_OK) {
|
58
|
1220 ngx_http_upstream_finalize_request(r, u,
|
|
1221 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1222 return;
|
|
1223 }
|
|
1224
|
|
1225 continue;
|
|
1226 }
|
|
1227
|
|
1228 if (ngx_http_upstream_copy_header_line(r, &h[i], 0) != NGX_OK) {
|
|
1229 ngx_http_upstream_finalize_request(r, u,
|
|
1230 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1231 return;
|
|
1232 }
|
|
1233 }
|
|
1234
|
198
|
1235 if (r->headers_out.server && r->headers_out.server->value.data == NULL) {
|
|
1236 r->headers_out.server->hash = 0;
|
|
1237 }
|
|
1238
|
|
1239 if (r->headers_out.date && r->headers_out.date->value.data == NULL) {
|
|
1240 r->headers_out.date->hash = 0;
|
|
1241 }
|
|
1242
|
78
|
1243 r->headers_out.status = u->headers_in.status_n;
|
|
1244 r->headers_out.status_line = u->headers_in.status_line;
|
|
1245
|
130
|
1246 if (r->headers_out.content_length_n != -1) {
|
|
1247 u->length = (size_t) r->headers_out.content_length_n;
|
|
1248
|
|
1249 } else {
|
|
1250 u->length = NGX_MAX_SIZE_T_VALUE;
|
|
1251 }
|
|
1252
|
58
|
1253 rc = ngx_http_send_header(r);
|
28
|
1254
|
178
|
1255 if (rc == NGX_ERROR || rc > NGX_OK || r->post_action) {
|
34
|
1256 ngx_http_upstream_finalize_request(r, u, rc);
|
28
|
1257 return;
|
|
1258 }
|
|
1259
|
|
1260 u->header_sent = 1;
|
|
1261
|
122
|
1262 if (r->request_body && r->request_body->temp_file) {
|
112
|
1263 for (cl = r->pool->cleanup; cl; cl = cl->next) {
|
|
1264 if (cl->handler == ngx_pool_cleanup_file) {
|
|
1265 clf = cl->data;
|
|
1266
|
|
1267 if (clf->fd == r->request_body->temp_file->file.fd) {
|
|
1268 cl->handler(clf);
|
|
1269 cl->handler = NULL;
|
|
1270 break;
|
|
1271 }
|
|
1272 }
|
|
1273 }
|
|
1274 }
|
|
1275
|
132
|
1276 c = r->connection;
|
|
1277
|
130
|
1278 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
1279
|
198
|
1280 if (!u->buffering) {
|
130
|
1281
|
|
1282 if (u->input_filter == NULL) {
|
|
1283 u->input_filter_init = ngx_http_upstream_non_buffered_filter_init;
|
|
1284 u->input_filter = ngx_http_upstream_non_buffered_filter;
|
|
1285 u->input_filter_ctx = r;
|
|
1286 }
|
|
1287
|
|
1288 u->peer.connection->read->handler =
|
|
1289 ngx_http_upstream_process_non_buffered_body;
|
|
1290 r->write_event_handler =
|
|
1291 ngx_http_upstream_process_non_buffered_downstream;
|
|
1292
|
|
1293 r->limit_rate = 0;
|
|
1294
|
|
1295 if (u->input_filter_init(u->input_filter_ctx) == NGX_ERROR) {
|
|
1296 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1297 return;
|
|
1298 }
|
|
1299
|
132
|
1300 if (clcf->tcp_nodelay && c->tcp_nodelay == NGX_TCP_NODELAY_UNSET) {
|
|
1301 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "tcp_nodelay");
|
|
1302
|
|
1303 tcp_nodelay = 1;
|
|
1304
|
|
1305 if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY,
|
|
1306 (const void *) &tcp_nodelay, sizeof(int)) == -1)
|
|
1307 {
|
|
1308 ngx_connection_error(c, ngx_socket_errno,
|
|
1309 "setsockopt(TCP_NODELAY) failed");
|
|
1310 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1311 return;
|
|
1312 }
|
|
1313
|
|
1314 c->tcp_nodelay = NGX_TCP_NODELAY_SET;
|
|
1315 }
|
|
1316
|
130
|
1317 size = u->buffer.last - u->buffer.pos;
|
|
1318
|
|
1319 if (size) {
|
|
1320 u->buffer.last = u->buffer.pos;
|
|
1321
|
|
1322 if (u->input_filter(u->input_filter_ctx, size) == NGX_ERROR) {
|
|
1323 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1324 return;
|
|
1325 }
|
|
1326
|
132
|
1327 ngx_http_upstream_process_non_buffered_body(c->write);
|
130
|
1328
|
|
1329 } else {
|
|
1330 u->buffer.pos = u->buffer.start;
|
|
1331 u->buffer.last = u->buffer.start;
|
|
1332
|
|
1333 if (ngx_http_send_special(r, NGX_HTTP_FLUSH) == NGX_ERROR) {
|
|
1334 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1335 return;
|
|
1336 }
|
|
1337 }
|
|
1338
|
|
1339 return;
|
|
1340 }
|
|
1341
|
28
|
1342 /* TODO: preallocate event_pipe bufs, look "Content-Length" */
|
|
1343
|
|
1344 #if 0
|
|
1345
|
|
1346 if (u->cache && u->cache->ctx.file.fd != NGX_INVALID_FILE) {
|
|
1347 if (ngx_close_file(u->cache->ctx.file.fd) == NGX_FILE_ERROR) {
|
132
|
1348 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
28
|
1349 ngx_close_file_n " \"%s\" failed",
|
|
1350 u->cache->ctx.file.name.data);
|
|
1351 }
|
|
1352 }
|
|
1353
|
|
1354 if (u->cachable) {
|
130
|
1355 header = (ngx_http_cache_header_t *) u->buffer->start;
|
28
|
1356
|
|
1357 header->expires = u->cache->ctx.expires;
|
|
1358 header->last_modified = u->cache->ctx.last_modified;
|
|
1359 header->date = u->cache->ctx.date;
|
|
1360 header->length = r->headers_out.content_length_n;
|
|
1361 u->cache->ctx.length = r->headers_out.content_length_n;
|
|
1362
|
|
1363 header->key_len = u->cache->ctx.key0.len;
|
|
1364 ngx_memcpy(&header->key, u->cache->ctx.key0.data, header->key_len);
|
|
1365 header->key[header->key_len] = LF;
|
|
1366 }
|
|
1367
|
|
1368 #endif
|
|
1369
|
130
|
1370 p = u->pipe;
|
28
|
1371
|
|
1372 p->output_filter = (ngx_event_pipe_output_filter_pt) ngx_http_output_filter;
|
|
1373 p->output_ctx = r;
|
|
1374 p->tag = u->output.tag;
|
126
|
1375 p->bufs = u->conf->bufs;
|
28
|
1376 p->busy_size = u->conf->busy_buffers_size;
|
|
1377 p->upstream = u->peer.connection;
|
132
|
1378 p->downstream = c;
|
28
|
1379 p->pool = r->pool;
|
132
|
1380 p->log = c->log;
|
126
|
1381
|
28
|
1382 p->cachable = u->cachable;
|
|
1383
|
50
|
1384 p->temp_file = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
|
|
1385 if (p->temp_file == NULL) {
|
28
|
1386 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1387 return;
|
|
1388 }
|
|
1389
|
|
1390 p->temp_file->file.fd = NGX_INVALID_FILE;
|
132
|
1391 p->temp_file->file.log = c->log;
|
28
|
1392 p->temp_file->path = u->conf->temp_path;
|
|
1393 p->temp_file->pool = r->pool;
|
126
|
1394
|
28
|
1395 if (u->cachable) {
|
|
1396 p->temp_file->persistent = 1;
|
|
1397 } else {
|
|
1398 p->temp_file->warn = "an upstream response is buffered "
|
|
1399 "to a temporary file";
|
|
1400 }
|
|
1401
|
|
1402 p->max_temp_file_size = u->conf->max_temp_file_size;
|
|
1403 p->temp_file_write_size = u->conf->temp_file_write_size;
|
|
1404
|
50
|
1405 p->preread_bufs = ngx_alloc_chain_link(r->pool);
|
|
1406 if (p->preread_bufs == NULL) {
|
28
|
1407 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1408 return;
|
|
1409 }
|
130
|
1410 p->preread_bufs->buf = &u->buffer;
|
28
|
1411 p->preread_bufs->next = NULL;
|
130
|
1412 u->buffer.recycled = 1;
|
|
1413
|
|
1414 p->preread_size = u->buffer.last - u->buffer.pos;
|
28
|
1415
|
|
1416 if (u->cachable) {
|
|
1417 p->buf_to_file = ngx_calloc_buf(r->pool);
|
|
1418 if (p->buf_to_file == NULL) {
|
|
1419 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1420 return;
|
|
1421 }
|
130
|
1422 p->buf_to_file->pos = u->buffer.start;
|
|
1423 p->buf_to_file->last = u->buffer.pos;
|
28
|
1424 p->buf_to_file->temporary = 1;
|
|
1425 }
|
|
1426
|
|
1427 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
|
|
1428 /* the posted aio operation may currupt a shadow buffer */
|
|
1429 p->single_buf = 1;
|
|
1430 }
|
|
1431
|
|
1432 /* TODO: p->free_bufs = 0 if use ngx_create_chain_of_bufs() */
|
|
1433 p->free_bufs = 1;
|
|
1434
|
|
1435 /*
|
130
|
1436 * event_pipe would do u->buffer.last += p->preread_size
|
28
|
1437 * as though these bytes were read
|
|
1438 */
|
130
|
1439 u->buffer.last = u->buffer.pos;
|
28
|
1440
|
|
1441 if (u->conf->cyclic_temp_file) {
|
|
1442
|
|
1443 /*
|
|
1444 * we need to disable the use of sendfile() if we use cyclic temp file
|
|
1445 * because the writing a new data may interfere with sendfile()
|
|
1446 * that uses the same kernel file pages (at least on FreeBSD)
|
|
1447 */
|
|
1448
|
|
1449 p->cyclic_temp_file = 1;
|
132
|
1450 c->sendfile = 0;
|
28
|
1451
|
|
1452 } else {
|
|
1453 p->cyclic_temp_file = 0;
|
|
1454 }
|
|
1455
|
|
1456 p->read_timeout = u->conf->read_timeout;
|
|
1457 p->send_timeout = clcf->send_timeout;
|
|
1458 p->send_lowat = clcf->send_lowat;
|
|
1459
|
58
|
1460 u->peer.connection->read->handler = ngx_http_upstream_process_body;
|
|
1461 r->write_event_handler = ngx_http_upstream_process_downstream;
|
28
|
1462
|
|
1463 ngx_http_upstream_process_body(u->peer.connection->read);
|
|
1464 }
|
|
1465
|
|
1466
|
36
|
1467 static void
|
130
|
1468 ngx_http_upstream_process_non_buffered_downstream(ngx_http_request_t *r)
|
|
1469 {
|
|
1470 ngx_http_upstream_process_non_buffered_body(r->connection->write);
|
|
1471 }
|
|
1472
|
|
1473
|
|
1474 static void
|
|
1475 ngx_http_upstream_process_non_buffered_body(ngx_event_t *ev)
|
|
1476 {
|
|
1477 size_t size;
|
|
1478 ssize_t n;
|
|
1479 ngx_buf_t *b;
|
132
|
1480 ngx_int_t rc;
|
130
|
1481 ngx_uint_t do_write;
|
132
|
1482 ngx_connection_t *c, *client;
|
130
|
1483 ngx_http_request_t *r;
|
|
1484 ngx_http_upstream_t *u;
|
|
1485 ngx_http_core_loc_conf_t *clcf;
|
|
1486
|
|
1487 c = ev->data;
|
|
1488
|
|
1489 if (ev->write) {
|
|
1490 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1491 "http upstream process non buffered downstream");
|
|
1492 c->log->action = "sending to client";
|
|
1493
|
|
1494 } else {
|
|
1495 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1496 "http upstream process non buffered upstream");
|
|
1497 c->log->action = "reading upstream";
|
|
1498 }
|
|
1499
|
|
1500 if (ev->timedout) {
|
|
1501 if (ev->write) {
|
|
1502 c->timedout = 1;
|
160
|
1503 ngx_connection_error(c, NGX_ETIMEDOUT, "client timed out");
|
|
1504
|
130
|
1505 } else {
|
160
|
1506 ngx_connection_error(c, NGX_ETIMEDOUT, "upstream timed out");
|
130
|
1507 }
|
|
1508 }
|
|
1509
|
|
1510 r = c->data;
|
|
1511 u = r->upstream;
|
132
|
1512 client = r->connection;
|
130
|
1513
|
|
1514 b = &u->buffer;
|
|
1515
|
|
1516 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
1517
|
|
1518 do_write = ev->write;
|
|
1519
|
|
1520 for ( ;; ) {
|
|
1521
|
|
1522 if (do_write) {
|
|
1523
|
|
1524 if (u->out_bufs || u->busy_bufs) {
|
132
|
1525 rc = ngx_http_output_filter(r, u->out_bufs);
|
|
1526
|
|
1527 if (client->destroyed) {
|
|
1528 return;
|
|
1529 }
|
|
1530
|
|
1531 if (rc == NGX_ERROR) {
|
130
|
1532 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1533 return;
|
|
1534 }
|
|
1535
|
|
1536 ngx_chain_update_chains(&u->free_bufs, &u->busy_bufs,
|
|
1537 &u->out_bufs, u->output.tag);
|
|
1538 }
|
|
1539
|
|
1540 if (u->busy_bufs == NULL) {
|
|
1541
|
|
1542 if (u->length == 0
|
|
1543 || u->peer.connection->read->eof
|
|
1544 || u->peer.connection->read->error)
|
|
1545 {
|
|
1546 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1547 return;
|
|
1548 }
|
|
1549
|
|
1550 b->pos = b->start;
|
|
1551 b->last = b->start;
|
|
1552 }
|
|
1553 }
|
|
1554
|
|
1555 size = b->end - b->last;
|
|
1556
|
|
1557 if (size > u->length) {
|
|
1558 size = u->length;
|
|
1559 }
|
|
1560
|
|
1561 if (size && u->peer.connection->read->ready) {
|
|
1562 n = u->peer.connection->recv(u->peer.connection, b->last, size);
|
|
1563
|
|
1564 if (n == NGX_AGAIN) {
|
|
1565 break;
|
|
1566 }
|
|
1567
|
|
1568 if (n > 0) {
|
|
1569 if (u->input_filter(u->input_filter_ctx, n) == NGX_ERROR) {
|
|
1570 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1571 return;
|
|
1572 }
|
|
1573 }
|
|
1574
|
|
1575 do_write = 1;
|
|
1576
|
|
1577 continue;
|
|
1578 }
|
|
1579
|
|
1580 break;
|
|
1581 }
|
|
1582
|
132
|
1583 if (client->data == r) {
|
|
1584 if (ngx_handle_write_event(client->write, clcf->send_lowat)
|
|
1585 == NGX_ERROR)
|
|
1586 {
|
|
1587 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1588 return;
|
|
1589 }
|
130
|
1590 }
|
|
1591
|
132
|
1592 if (client->write->active) {
|
|
1593 ngx_add_timer(client->write, clcf->send_timeout);
|
|
1594
|
|
1595 } else if (client->write->timer_set) {
|
|
1596 ngx_del_timer(client->write);
|
130
|
1597 }
|
|
1598
|
|
1599 if (ngx_handle_read_event(u->peer.connection->read, 0) == NGX_ERROR) {
|
|
1600 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1601 return;
|
|
1602 }
|
|
1603
|
|
1604 if (u->peer.connection->read->active) {
|
|
1605 ngx_add_timer(u->peer.connection->read, u->conf->read_timeout);
|
|
1606
|
132
|
1607 } else if (u->peer.connection->read->timer_set) {
|
|
1608 ngx_del_timer(u->peer.connection->read);
|
130
|
1609 }
|
|
1610 }
|
|
1611
|
|
1612
|
|
1613 static ngx_int_t
|
|
1614 ngx_http_upstream_non_buffered_filter_init(void *data)
|
|
1615 {
|
|
1616 return NGX_OK;
|
|
1617 }
|
|
1618
|
|
1619
|
|
1620 static ngx_int_t
|
|
1621 ngx_http_upstream_non_buffered_filter(void *data, ssize_t bytes)
|
|
1622 {
|
|
1623 ngx_http_request_t *r = data;
|
|
1624
|
|
1625 ngx_buf_t *b;
|
|
1626 ngx_chain_t *cl, **ll;
|
|
1627 ngx_http_upstream_t *u;
|
|
1628
|
|
1629 u = r->upstream;
|
|
1630
|
|
1631 for (cl = u->out_bufs, ll = &u->out_bufs; cl; cl = cl->next) {
|
|
1632 ll = &cl->next;
|
|
1633 }
|
|
1634
|
|
1635 cl = ngx_chain_get_free_buf(r->pool, &u->free_bufs);
|
|
1636 if (cl == NULL) {
|
|
1637 return NGX_ERROR;
|
|
1638 }
|
|
1639
|
|
1640 *ll = cl;
|
|
1641
|
|
1642 cl->buf->flush = 1;
|
|
1643 cl->buf->memory = 1;
|
|
1644
|
|
1645 b = &u->buffer;
|
|
1646
|
|
1647 cl->buf->pos = b->last;
|
|
1648 b->last += bytes;
|
|
1649 cl->buf->last = b->last;
|
|
1650
|
|
1651 if (u->length == NGX_MAX_SIZE_T_VALUE) {
|
|
1652 return NGX_OK;
|
|
1653 }
|
|
1654
|
|
1655 u->length -= bytes;
|
|
1656
|
|
1657 return NGX_OK;
|
|
1658 }
|
|
1659
|
|
1660
|
|
1661 static void
|
58
|
1662 ngx_http_upstream_process_downstream(ngx_http_request_t *r)
|
|
1663 {
|
|
1664 ngx_http_upstream_process_body(r->connection->write);
|
|
1665 }
|
|
1666
|
|
1667
|
|
1668 static void
|
36
|
1669 ngx_http_upstream_process_body(ngx_event_t *ev)
|
28
|
1670 {
|
58
|
1671 ngx_event_pipe_t *p;
|
132
|
1672 ngx_connection_t *c, *downstream;
|
28
|
1673 ngx_http_request_t *r;
|
|
1674 ngx_http_upstream_t *u;
|
|
1675
|
|
1676 c = ev->data;
|
|
1677 r = c->data;
|
|
1678 u = r->upstream;
|
132
|
1679 downstream = r->connection;
|
28
|
1680
|
|
1681 if (ev->write) {
|
32
|
1682 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1683 "http upstream process downstream");
|
|
1684 c->log->action = "sending to client";
|
126
|
1685
|
28
|
1686 } else {
|
32
|
1687 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1688 "http upstream process upstream");
|
|
1689 c->log->action = "reading upstream";
|
28
|
1690 }
|
126
|
1691
|
130
|
1692 p = u->pipe;
|
28
|
1693
|
|
1694 if (ev->timedout) {
|
|
1695 if (ev->write) {
|
76
|
1696 if (ev->delayed) {
|
|
1697
|
|
1698 ev->timedout = 0;
|
|
1699 ev->delayed = 0;
|
|
1700
|
|
1701 if (!ev->ready) {
|
|
1702 ngx_add_timer(ev, p->send_timeout);
|
|
1703
|
|
1704 if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR)
|
|
1705 {
|
|
1706 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1707 return;
|
|
1708 }
|
|
1709
|
|
1710 return;
|
|
1711 }
|
|
1712
|
|
1713 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
132
|
1714
|
|
1715 if (downstream->destroyed) {
|
|
1716 return;
|
|
1717 }
|
|
1718
|
76
|
1719 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1720 return;
|
|
1721 }
|
|
1722
|
|
1723 } else {
|
|
1724 p->downstream_error = 1;
|
126
|
1725 c->timedout = 1;
|
160
|
1726 ngx_connection_error(c, NGX_ETIMEDOUT, "client timed out");
|
76
|
1727 }
|
28
|
1728
|
|
1729 } else {
|
126
|
1730 p->upstream_error = 1;
|
160
|
1731 ngx_connection_error(c, NGX_ETIMEDOUT, "upstream timed out");
|
28
|
1732 }
|
|
1733
|
|
1734 } else {
|
76
|
1735 if (ev->write && ev->delayed) {
|
|
1736 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1737 "http downstream delayed");
|
|
1738
|
|
1739 if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR) {
|
|
1740 return;
|
|
1741 }
|
|
1742
|
|
1743 return;
|
|
1744 }
|
|
1745
|
28
|
1746 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
132
|
1747
|
|
1748 if (downstream->destroyed) {
|
|
1749 return;
|
|
1750 }
|
|
1751
|
28
|
1752 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1753 return;
|
|
1754 }
|
|
1755 }
|
126
|
1756
|
28
|
1757 if (u->peer.connection) {
|
|
1758
|
|
1759 #if (NGX_HTTP_FILE_CACHE)
|
|
1760
|
|
1761 if (p->upstream_done && u->cachable) {
|
|
1762 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
1763 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
1764 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1765 return;
|
|
1766 }
|
|
1767
|
|
1768 } else if (p->upstream_eof && u->cachable) {
|
|
1769
|
|
1770 /* TODO: check length & update cache */
|
|
1771
|
|
1772 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
1773 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
1774 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1775 return;
|
|
1776 }
|
|
1777 }
|
|
1778
|
|
1779 #endif
|
|
1780
|
|
1781 if (p->upstream_done || p->upstream_eof || p->upstream_error) {
|
32
|
1782 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1783 "http upstream exit: %p", p->out);
|
28
|
1784 #if 0
|
|
1785 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
1786 #endif
|
|
1787 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1788 return;
|
|
1789 }
|
|
1790 }
|
|
1791
|
|
1792 if (p->downstream_error) {
|
32
|
1793 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1794 "http upstream downstream error");
|
28
|
1795
|
|
1796 if (!u->cachable && u->peer.connection) {
|
|
1797 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1798 }
|
|
1799 }
|
|
1800 }
|
|
1801
|
|
1802
|
36
|
1803 static void
|
|
1804 ngx_http_upstream_dummy_handler(ngx_event_t *wev)
|
28
|
1805 {
|
|
1806 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
1807 "http upstream dummy handler");
|
|
1808 }
|
|
1809
|
|
1810
|
36
|
1811 static void
|
|
1812 ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
|
|
1813 ngx_uint_t ft_type)
|
28
|
1814 {
|
74
|
1815 ngx_uint_t status, down;
|
28
|
1816
|
|
1817 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1818 "http next upstream, %xD", ft_type);
|
|
1819
|
|
1820 #if 0
|
|
1821 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
1822 #endif
|
|
1823
|
74
|
1824 if (ft_type == NGX_HTTP_UPSTREAM_FT_HTTP_404) {
|
|
1825 down = 0;
|
|
1826 } else {
|
|
1827 down = 1;
|
28
|
1828 }
|
74
|
1829
|
|
1830 ngx_event_connect_peer_failed(&u->peer, down);
|
|
1831
|
28
|
1832 if (ft_type == NGX_HTTP_UPSTREAM_FT_TIMEOUT) {
|
|
1833 ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_ETIMEDOUT,
|
|
1834 "upstream timed out");
|
|
1835 }
|
126
|
1836
|
28
|
1837 if (u->peer.cached && ft_type == NGX_HTTP_UPSTREAM_FT_ERROR) {
|
|
1838 status = 0;
|
|
1839
|
|
1840 } else {
|
|
1841 switch(ft_type) {
|
|
1842
|
|
1843 case NGX_HTTP_UPSTREAM_FT_TIMEOUT:
|
|
1844 status = NGX_HTTP_GATEWAY_TIME_OUT;
|
|
1845 break;
|
|
1846
|
|
1847 case NGX_HTTP_UPSTREAM_FT_HTTP_500:
|
|
1848 status = NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
1849 break;
|
|
1850
|
|
1851 case NGX_HTTP_UPSTREAM_FT_HTTP_404:
|
|
1852 status = NGX_HTTP_NOT_FOUND;
|
|
1853 break;
|
|
1854
|
|
1855 /*
|
|
1856 * NGX_HTTP_UPSTREAM_FT_BUSY_LOCK and NGX_HTTP_UPSTREAM_FT_MAX_WAITING
|
|
1857 * never reach here
|
|
1858 */
|
|
1859
|
|
1860 default:
|
|
1861 status = NGX_HTTP_BAD_GATEWAY;
|
|
1862 }
|
|
1863 }
|
|
1864
|
132
|
1865 if (r->connection->error) {
|
28
|
1866 ngx_http_upstream_finalize_request(r, u,
|
|
1867 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
1868 return;
|
|
1869 }
|
|
1870
|
|
1871 if (status) {
|
|
1872 u->state->status = status;
|
|
1873
|
74
|
1874 if (u->peer.tries == 0 || !(u->conf->next_upstream & ft_type)) {
|
28
|
1875
|
|
1876 #if (NGX_HTTP_CACHE)
|
|
1877
|
|
1878 if (u->stale && (u->conf->use_stale & ft_type)) {
|
|
1879 ngx_http_upstream_finalize_request(r, u,
|
74
|
1880 ngx_http_send_cached_response(r));
|
28
|
1881 return;
|
|
1882 }
|
|
1883
|
|
1884 #endif
|
|
1885
|
|
1886 ngx_http_upstream_finalize_request(r, u, status);
|
|
1887 return;
|
|
1888 }
|
|
1889 }
|
|
1890
|
|
1891 if (u->peer.connection) {
|
|
1892 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1893 "close http upstream connection: %d",
|
|
1894 u->peer.connection->fd);
|
126
|
1895 #if (NGX_HTTP_SSL)
|
|
1896 if (u->peer.connection->ssl) {
|
|
1897 ngx_http_upstream_ssl_shutdown(u->peer.connection,
|
|
1898 &u->peer.peers->peer[u->peer.cur_peer]);
|
|
1899 }
|
|
1900 #endif
|
28
|
1901 ngx_close_connection(u->peer.connection);
|
|
1902 }
|
|
1903
|
|
1904 #if 0
|
|
1905 if (u->conf->busy_lock && !u->busy_locked) {
|
|
1906 ngx_http_upstream_busy_lock(p);
|
|
1907 return;
|
|
1908 }
|
|
1909 #endif
|
|
1910
|
|
1911 ngx_http_upstream_connect(r, u);
|
|
1912 }
|
|
1913
|
|
1914
|
36
|
1915 static void
|
118
|
1916 ngx_http_upstream_cleanup(void *data)
|
|
1917 {
|
|
1918 ngx_http_request_t *r = data;
|
|
1919
|
|
1920 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1921 "cleanup http upstream request: \"%V\"", &r->uri);
|
|
1922
|
|
1923 ngx_http_upstream_finalize_request(r, r->upstream, NGX_DONE);
|
|
1924 }
|
|
1925
|
|
1926
|
|
1927 static void
|
36
|
1928 ngx_http_upstream_finalize_request(ngx_http_request_t *r,
|
|
1929 ngx_http_upstream_t *u, ngx_int_t rc)
|
28
|
1930 {
|
112
|
1931 ngx_time_t *tp;
|
|
1932
|
32
|
1933 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1934 "finalize http upstream request: %i", rc);
|
28
|
1935
|
118
|
1936 *u->cleanup = NULL;
|
|
1937
|
112
|
1938 if (u->state->response_time) {
|
|
1939 tp = ngx_timeofday();
|
|
1940 u->state->response_time = tp->sec * 1000 + tp->msec
|
|
1941 - u->state->response_time;
|
|
1942 }
|
|
1943
|
28
|
1944 u->finalize_request(r, rc);
|
|
1945
|
|
1946 if (u->peer.connection) {
|
|
1947 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1948 "close http upstream connection: %d",
|
|
1949 u->peer.connection->fd);
|
126
|
1950 #if (NGX_HTTP_SSL)
|
|
1951
|
|
1952 /* TODO: do not shutdown persistent connection */
|
|
1953
|
|
1954 if (u->peer.connection->ssl) {
|
|
1955 ngx_http_upstream_ssl_shutdown(u->peer.connection,
|
|
1956 &u->peer.peers->peer[u->peer.cur_peer]);
|
|
1957 }
|
|
1958 #endif
|
28
|
1959 ngx_close_connection(u->peer.connection);
|
|
1960 }
|
|
1961
|
32
|
1962 u->peer.connection = NULL;
|
|
1963
|
112
|
1964 if (u->header_sent && (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE))
|
28
|
1965 {
|
|
1966 rc = 0;
|
|
1967 }
|
|
1968
|
130
|
1969 if (u->pipe && u->pipe->temp_file) {
|
28
|
1970 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1971 "http upstream temp fd: %d",
|
130
|
1972 u->pipe->temp_file->file.fd);
|
28
|
1973 }
|
|
1974
|
|
1975 #if 0
|
|
1976 if (u->cache) {
|
|
1977 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
32
|
1978 "http upstream cache fd: %d",
|
28
|
1979 u->cache->ctx.file.fd);
|
|
1980 }
|
|
1981 #endif
|
|
1982
|
58
|
1983 r->log_handler = u->saved_log_handler;
|
64
|
1984
|
|
1985 if (rc == NGX_DECLINED) {
|
|
1986 return;
|
|
1987 }
|
|
1988
|
32
|
1989 r->connection->log->action = "sending to client";
|
|
1990
|
178
|
1991 if (rc == 0 && r == r->main && !r->post_action) {
|
130
|
1992 rc = ngx_http_send_special(r, NGX_HTTP_LAST);
|
28
|
1993 }
|
|
1994
|
|
1995 ngx_http_finalize_request(r, rc);
|
|
1996 }
|
|
1997
|
|
1998
|
126
|
1999 #if (NGX_HTTP_SSL)
|
|
2000
|
|
2001 static void
|
|
2002 ngx_http_upstream_ssl_shutdown(ngx_connection_t *c, ngx_peer_t *peer)
|
|
2003 {
|
|
2004 /* lock peer mutex */
|
|
2005
|
|
2006 if (peer->ssl_session) {
|
|
2007 ngx_ssl_free_session(peer->ssl_session);
|
|
2008 }
|
|
2009
|
|
2010 peer->ssl_session = ngx_ssl_get_session(c);
|
|
2011
|
|
2012 /* unlock peer mutex */
|
|
2013
|
|
2014 /*
|
|
2015 * We send the "close notify" shutdown alert to the upstream only
|
|
2016 * and do not wait its "close notify" shutdown alert.
|
|
2017 * It is acceptable according to the TLS standard.
|
|
2018 */
|
|
2019
|
|
2020 c->ssl->no_wait_shutdown = 1;
|
|
2021
|
|
2022 (void) ngx_ssl_shutdown(c);
|
|
2023 }
|
|
2024
|
|
2025 #endif
|
|
2026
|
|
2027
|
58
|
2028 static ngx_int_t
|
|
2029 ngx_http_upstream_process_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2030 ngx_uint_t offset)
|
126
|
2031 {
|
58
|
2032 ngx_table_elt_t **ph;
|
126
|
2033
|
58
|
2034 ph = (ngx_table_elt_t **) ((char *) &r->upstream->headers_in + offset);
|
|
2035
|
|
2036 if (*ph == NULL) {
|
|
2037 *ph = h;
|
|
2038 }
|
|
2039
|
|
2040 return NGX_OK;
|
|
2041 }
|
|
2042
|
|
2043
|
|
2044 static ngx_int_t
|
|
2045 ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
|
|
2046 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
2047 {
|
|
2048 ngx_array_t *pa;
|
|
2049 ngx_table_elt_t **ph;
|
|
2050
|
|
2051 pa = (ngx_array_t *) ((char *) &r->upstream->headers_in + offset);
|
|
2052
|
|
2053 if (pa->elts == NULL) {
|
|
2054 if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
|
|
2055 {
|
|
2056 return NGX_ERROR;
|
|
2057 }
|
|
2058 }
|
|
2059
|
|
2060 ph = ngx_array_push(pa);
|
|
2061 if (ph == NULL) {
|
|
2062 return NGX_ERROR;
|
|
2063 }
|
|
2064
|
|
2065 *ph = h;
|
|
2066
|
|
2067 return NGX_OK;
|
|
2068 }
|
|
2069
|
|
2070
|
|
2071 static ngx_int_t
|
|
2072 ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2073 ngx_uint_t offset)
|
|
2074 {
|
|
2075 return NGX_OK;
|
|
2076 }
|
|
2077
|
|
2078
|
|
2079 static ngx_int_t
|
76
|
2080 ngx_http_upstream_process_limit_rate(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2081 ngx_uint_t offset)
|
126
|
2082 {
|
76
|
2083 ngx_int_t n;
|
|
2084
|
|
2085 r->upstream->headers_in.x_accel_limit_rate = h;
|
|
2086
|
|
2087 n = ngx_atoi(h->value.data, h->value.len);
|
|
2088
|
|
2089 if (n != NGX_ERROR) {
|
|
2090 r->limit_rate = (size_t) n;
|
|
2091 }
|
|
2092
|
|
2093 return NGX_OK;
|
|
2094 }
|
|
2095
|
|
2096
|
|
2097 static ngx_int_t
|
198
|
2098 ngx_http_upstream_process_buffering(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2099 ngx_uint_t offset)
|
|
2100 {
|
|
2101 u_char c0, c1, c2;
|
|
2102
|
|
2103 if (r->upstream->conf->change_buffering) {
|
|
2104
|
|
2105 if (h->value.len == 2) {
|
|
2106 c0 = ngx_tolower(h->value.data[0]);
|
|
2107 c1 = ngx_tolower(h->value.data[1]);
|
|
2108
|
|
2109 if (c0 == 'n' && c1 == 'o') {
|
|
2110 r->upstream->buffering = 0;
|
|
2111 }
|
|
2112
|
|
2113 } else if (h->value.len == 3) {
|
|
2114 c0 = ngx_tolower(h->value.data[0]);
|
|
2115 c1 = ngx_tolower(h->value.data[1]);
|
|
2116 c2 = ngx_tolower(h->value.data[2]);
|
|
2117
|
|
2118 if (c0 == 'y' && c1 == 'e' && c2 == 's') {
|
|
2119 r->upstream->buffering = 1;
|
|
2120 }
|
|
2121 }
|
|
2122 }
|
|
2123
|
|
2124 return NGX_OK;
|
|
2125 }
|
|
2126
|
|
2127
|
|
2128 static ngx_int_t
|
58
|
2129 ngx_http_upstream_copy_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2130 ngx_uint_t offset)
|
|
2131 {
|
122
|
2132 ngx_table_elt_t *ho, **ph;
|
58
|
2133
|
|
2134 ho = ngx_list_push(&r->headers_out.headers);
|
|
2135 if (ho == NULL) {
|
|
2136 return NGX_ERROR;
|
|
2137 }
|
|
2138
|
|
2139 *ho = *h;
|
|
2140
|
122
|
2141 if (offset) {
|
|
2142 ph = (ngx_table_elt_t **) ((char *) &r->headers_out + offset);
|
|
2143 *ph = ho;
|
|
2144 }
|
|
2145
|
58
|
2146 return NGX_OK;
|
|
2147 }
|
|
2148
|
|
2149
|
|
2150 static ngx_int_t
|
|
2151 ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r,
|
|
2152 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
2153 {
|
|
2154 ngx_array_t *pa;
|
|
2155 ngx_table_elt_t *ho, **ph;
|
|
2156
|
|
2157 pa = (ngx_array_t *) ((char *) &r->headers_out + offset);
|
|
2158
|
|
2159 if (pa->elts == NULL) {
|
|
2160 if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
|
|
2161 {
|
|
2162 return NGX_ERROR;
|
|
2163 }
|
|
2164 }
|
|
2165
|
|
2166 ph = ngx_array_push(pa);
|
|
2167 if (ph == NULL) {
|
|
2168 return NGX_ERROR;
|
|
2169 }
|
|
2170
|
|
2171 ho = ngx_list_push(&r->headers_out.headers);
|
|
2172 if (ho == NULL) {
|
|
2173 return NGX_ERROR;
|
|
2174 }
|
|
2175
|
|
2176 *ho = *h;
|
|
2177 *ph = ho;
|
|
2178
|
|
2179 return NGX_OK;
|
|
2180 }
|
|
2181
|
|
2182
|
|
2183 static ngx_int_t
|
|
2184 ngx_http_upstream_copy_content_type(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2185 ngx_uint_t offset)
|
|
2186 {
|
|
2187 r->headers_out.content_type = h->value;
|
|
2188
|
|
2189 return NGX_OK;
|
|
2190 }
|
|
2191
|
|
2192
|
|
2193 static ngx_int_t
|
|
2194 ngx_http_upstream_copy_content_length(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2195 ngx_uint_t offset)
|
|
2196 {
|
|
2197 ngx_table_elt_t *ho;
|
|
2198
|
|
2199 ho = ngx_list_push(&r->headers_out.headers);
|
|
2200 if (ho == NULL) {
|
|
2201 return NGX_ERROR;
|
|
2202 }
|
|
2203
|
|
2204 *ho = *h;
|
|
2205
|
|
2206 r->headers_out.content_length = ho;
|
|
2207 r->headers_out.content_length_n = ngx_atoof(h->value.data, h->value.len);
|
|
2208
|
|
2209 return NGX_OK;
|
|
2210 }
|
|
2211
|
|
2212
|
|
2213 static ngx_int_t
|
|
2214 ngx_http_upstream_rewrite_location(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2215 ngx_uint_t offset)
|
|
2216 {
|
|
2217 ngx_int_t rc;
|
|
2218 ngx_table_elt_t *ho;
|
|
2219
|
|
2220 ho = ngx_list_push(&r->headers_out.headers);
|
|
2221 if (ho == NULL) {
|
|
2222 return NGX_ERROR;
|
|
2223 }
|
|
2224
|
|
2225 *ho = *h;
|
|
2226
|
|
2227 if (r->upstream->rewrite_redirect) {
|
|
2228 rc = r->upstream->rewrite_redirect(r, ho, 0);
|
|
2229
|
78
|
2230 if (rc == NGX_DECLINED) {
|
|
2231 return NGX_OK;
|
|
2232 }
|
|
2233
|
58
|
2234 if (rc == NGX_OK) {
|
|
2235 r->headers_out.location = ho;
|
|
2236
|
|
2237 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
2238 "rewritten location: \"%V\"", &ho->value);
|
|
2239 }
|
|
2240
|
|
2241 return rc;
|
|
2242 }
|
|
2243
|
|
2244 /*
|
|
2245 * we do not set r->headers_out.location here to avoid the handling
|
|
2246 * the local redirects without a host name by ngx_http_header_filter()
|
|
2247 */
|
|
2248
|
|
2249 return NGX_OK;
|
|
2250 }
|
|
2251
|
|
2252
|
|
2253 static ngx_int_t
|
|
2254 ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
2255 ngx_uint_t offset)
|
|
2256 {
|
|
2257 u_char *p;
|
|
2258 ngx_int_t rc;
|
|
2259 ngx_table_elt_t *ho;
|
|
2260
|
|
2261 ho = ngx_list_push(&r->headers_out.headers);
|
|
2262 if (ho == NULL) {
|
|
2263 return NGX_ERROR;
|
|
2264 }
|
|
2265
|
|
2266 *ho = *h;
|
|
2267
|
|
2268 if (r->upstream->rewrite_redirect) {
|
|
2269
|
|
2270 p = (u_char *) ngx_strstr(ho->value.data, "url=");
|
|
2271
|
|
2272 if (p) {
|
|
2273 rc = r->upstream->rewrite_redirect(r, ho, p + 4 - ho->value.data);
|
|
2274
|
|
2275 } else {
|
|
2276 return NGX_OK;
|
|
2277 }
|
|
2278
|
78
|
2279 if (rc == NGX_DECLINED) {
|
|
2280 return NGX_OK;
|
|
2281 }
|
|
2282
|
58
|
2283 #if (NGX_DEBUG)
|
|
2284 if (rc == NGX_OK) {
|
|
2285 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
2286 "rewritten refresh: \"%V\"", &ho->value);
|
|
2287 }
|
|
2288 #endif
|
|
2289
|
|
2290 return rc;
|
|
2291 }
|
|
2292
|
|
2293 return NGX_OK;
|
|
2294 }
|
|
2295
|
|
2296
|
|
2297 #if (NGX_HTTP_GZIP)
|
|
2298
|
|
2299 static ngx_int_t
|
|
2300 ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r,
|
|
2301 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
2302 {
|
|
2303 ngx_table_elt_t *ho;
|
|
2304
|
|
2305 ho = ngx_list_push(&r->headers_out.headers);
|
|
2306 if (ho == NULL) {
|
|
2307 return NGX_ERROR;
|
|
2308 }
|
|
2309
|
|
2310 *ho = *h;
|
|
2311
|
|
2312 r->headers_out.content_encoding = ho;
|
|
2313
|
|
2314 return NGX_OK;
|
|
2315 }
|
|
2316
|
|
2317 #endif
|
|
2318
|
|
2319
|
36
|
2320 static size_t
|
|
2321 ngx_http_upstream_log_status_getlen(ngx_http_request_t *r, uintptr_t data)
|
28
|
2322 {
|
|
2323 if (r->upstream) {
|
|
2324 return r->upstream->states.nelts * (3 + 2);
|
|
2325 }
|
|
2326
|
|
2327 return 1;
|
|
2328 }
|
|
2329
|
|
2330
|
36
|
2331 static u_char *
|
|
2332 ngx_http_upstream_log_status(ngx_http_request_t *r, u_char *buf,
|
|
2333 ngx_http_log_op_t *op)
|
28
|
2334 {
|
|
2335 ngx_uint_t i;
|
|
2336 ngx_http_upstream_t *u;
|
|
2337 ngx_http_upstream_state_t *state;
|
|
2338
|
|
2339 u = r->upstream;
|
|
2340
|
122
|
2341 if (u == NULL || u->states.nelts == 0) {
|
28
|
2342 *buf = '-';
|
|
2343 return buf + 1;
|
|
2344 }
|
|
2345
|
|
2346 i = 0;
|
|
2347 state = u->states.elts;
|
|
2348
|
|
2349 for ( ;; ) {
|
|
2350 if (state[i].status == 0) {
|
|
2351 *buf++ = '-';
|
|
2352
|
|
2353 } else {
|
|
2354 buf = ngx_sprintf(buf, "%ui", state[i].status);
|
|
2355 }
|
|
2356
|
|
2357 if (++i == u->states.nelts) {
|
|
2358 return buf;
|
|
2359 }
|
|
2360
|
|
2361 *buf++ = ',';
|
|
2362 *buf++ = ' ';
|
|
2363 }
|
|
2364 }
|
|
2365
|
|
2366
|
122
|
2367 static size_t
|
|
2368 ngx_http_upstream_log_response_time_getlen(ngx_http_request_t *r,
|
|
2369 uintptr_t data)
|
|
2370 {
|
|
2371 if (r->upstream) {
|
|
2372 return r->upstream->states.nelts * (NGX_TIME_T_LEN + 4 + 2);
|
|
2373 }
|
|
2374
|
|
2375 return 1;
|
|
2376 }
|
|
2377
|
|
2378
|
58
|
2379 static u_char *
|
112
|
2380 ngx_http_upstream_log_response_time(ngx_http_request_t *r, u_char *buf,
|
|
2381 ngx_http_log_op_t *op)
|
|
2382 {
|
|
2383 ngx_uint_t i;
|
|
2384 ngx_http_upstream_t *u;
|
|
2385 ngx_http_upstream_state_t *state;
|
|
2386
|
|
2387 u = r->upstream;
|
|
2388
|
122
|
2389 if (u == NULL || u->states.nelts == 0) {
|
112
|
2390 *buf = '-';
|
|
2391 return buf + 1;
|
|
2392 }
|
|
2393
|
|
2394 i = 0;
|
|
2395 state = u->states.elts;
|
|
2396
|
|
2397 for ( ;; ) {
|
|
2398 if (state[i].status == 0) {
|
|
2399 *buf++ = '-';
|
|
2400
|
|
2401 } else {
|
|
2402 buf = ngx_sprintf(buf, "%d.%03d",
|
|
2403 state[i].response_time / 1000,
|
|
2404 state[i].response_time % 1000);
|
|
2405 }
|
|
2406
|
|
2407 if (++i == u->states.nelts) {
|
|
2408 return buf;
|
|
2409 }
|
|
2410
|
|
2411 *buf++ = ',';
|
|
2412 *buf++ = ' ';
|
|
2413 }
|
|
2414 }
|
|
2415
|
|
2416
|
|
2417 static u_char *
|
58
|
2418 ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf, size_t len)
|
28
|
2419 {
|
|
2420 u_char *p;
|
|
2421 ngx_http_upstream_t *u;
|
|
2422 ngx_peer_connection_t *peer;
|
|
2423
|
|
2424 u = r->upstream;
|
|
2425 peer = &u->peer;
|
|
2426
|
|
2427 p = ngx_snprintf(buf, len,
|
58
|
2428 ", server: %V, URL: \"%V\","
|
118
|
2429 " upstream: \"%V%V%s%V\"",
|
52
|
2430 &r->server_name,
|
28
|
2431 &r->unparsed_uri,
|
58
|
2432 &u->conf->schema,
|
28
|
2433 &peer->peers->peer[peer->cur_peer].name,
|
|
2434 peer->peers->peer[peer->cur_peer].uri_separator,
|
104
|
2435 &u->uri);
|
28
|
2436 len -= p - buf;
|
|
2437 buf = p;
|
|
2438
|
54
|
2439 return ngx_http_log_error_info(r, buf, len);
|
28
|
2440 }
|
|
2441
|
|
2442
|
36
|
2443 static ngx_int_t
|
122
|
2444 ngx_http_upstream_add_variables(ngx_conf_t *cf)
|
28
|
2445 {
|
122
|
2446 ngx_http_variable_t *var, *v;
|
28
|
2447 ngx_http_log_op_name_t *op;
|
|
2448
|
122
|
2449 for (v = ngx_http_upstream_vars; v->name.len; v++) {
|
|
2450 var = ngx_http_add_variable(cf, &v->name, v->flags);
|
|
2451 if (var == NULL) {
|
|
2452 return NGX_ERROR;
|
|
2453 }
|
|
2454
|
186
|
2455 var->get_handler = v->get_handler;
|
122
|
2456 var->data = v->data;
|
|
2457 }
|
|
2458
|
28
|
2459 for (op = ngx_http_upstream_log_fmt_ops; op->name.len; op++) { /* void */ }
|
|
2460 op->run = NULL;
|
|
2461
|
|
2462 for (op = ngx_http_log_fmt_ops; op->run; op++) {
|
|
2463 if (op->name.len == 0) {
|
|
2464 op = (ngx_http_log_op_name_t *) op->run;
|
|
2465 }
|
|
2466 }
|
|
2467
|
|
2468 op->run = (ngx_http_log_op_run_pt) ngx_http_upstream_log_fmt_ops;
|
|
2469
|
|
2470 return NGX_OK;
|
|
2471 }
|
58
|
2472
|
|
2473
|
122
|
2474 static ngx_int_t
|
|
2475 ngx_http_upstream_status_variable(ngx_http_request_t *r,
|
|
2476 ngx_http_variable_value_t *v, uintptr_t data)
|
|
2477 {
|
|
2478 u_char *p;
|
|
2479 size_t len;
|
|
2480 ngx_uint_t i;
|
|
2481 ngx_http_upstream_t *u;
|
|
2482 ngx_http_upstream_state_t *state;
|
|
2483
|
|
2484 v->valid = 1;
|
|
2485 v->no_cachable = 0;
|
|
2486 v->not_found = 0;
|
|
2487
|
|
2488 u = r->upstream;
|
|
2489
|
|
2490 if (u == NULL || u->states.nelts == 0) {
|
|
2491 v->not_found = 1;
|
|
2492 return NGX_OK;
|
|
2493 }
|
|
2494
|
|
2495 len = u->states.nelts * (3 + 2);
|
|
2496
|
|
2497 p = ngx_palloc(r->pool, len);
|
|
2498 if (p == NULL) {
|
|
2499 return NGX_ERROR;
|
|
2500 }
|
|
2501
|
|
2502 v->data = p;
|
|
2503
|
|
2504 i = 0;
|
|
2505 state = u->states.elts;
|
|
2506
|
|
2507 for ( ;; ) {
|
|
2508 if (state[i].status == 0) {
|
|
2509 *p++ = '-';
|
|
2510
|
|
2511 } else {
|
|
2512 p = ngx_sprintf(p, "%ui", state[i].status);
|
|
2513 }
|
|
2514
|
|
2515 if (++i == u->states.nelts) {
|
|
2516 break;
|
|
2517 }
|
|
2518
|
|
2519 *p++ = ',';
|
|
2520 *p++ = ' ';
|
|
2521 }
|
|
2522
|
|
2523 v->len = p - v->data;
|
|
2524
|
|
2525 return NGX_OK;
|
|
2526 }
|
|
2527
|
|
2528
|
|
2529 static ngx_int_t
|
|
2530 ngx_http_upstream_response_time_variable(ngx_http_request_t *r,
|
|
2531 ngx_http_variable_value_t *v, uintptr_t data)
|
|
2532 {
|
|
2533 u_char *p;
|
|
2534 size_t len;
|
|
2535 ngx_uint_t i;
|
|
2536 ngx_http_upstream_t *u;
|
|
2537 ngx_http_upstream_state_t *state;
|
|
2538
|
|
2539 v->valid = 1;
|
|
2540 v->no_cachable = 0;
|
|
2541 v->not_found = 0;
|
|
2542
|
|
2543 u = r->upstream;
|
|
2544
|
|
2545 if (u == NULL || u->states.nelts == 0) {
|
|
2546 v->not_found = 1;
|
|
2547 return NGX_OK;
|
|
2548 }
|
|
2549
|
|
2550 len = u->states.nelts * (NGX_TIME_T_LEN + 4 + 2);
|
|
2551
|
|
2552 p = ngx_palloc(r->pool, len);
|
|
2553 if (p == NULL) {
|
|
2554 return NGX_ERROR;
|
|
2555 }
|
|
2556
|
|
2557 v->data = p;
|
|
2558
|
|
2559 i = 0;
|
|
2560 state = u->states.elts;
|
|
2561
|
|
2562 for ( ;; ) {
|
|
2563 if (state[i].status == 0) {
|
|
2564 *p++ = '-';
|
|
2565
|
|
2566 } else {
|
|
2567 p = ngx_sprintf(p, "%d.%03d",
|
|
2568 state[i].response_time / 1000,
|
|
2569 state[i].response_time % 1000);
|
|
2570 }
|
|
2571
|
|
2572 if (++i == u->states.nelts) {
|
|
2573 break;
|
|
2574 }
|
|
2575
|
|
2576 *p++ = ',';
|
|
2577 *p++ = ' ';
|
|
2578 }
|
|
2579
|
|
2580 v->len = p - v->data;
|
|
2581
|
|
2582 return NGX_OK;
|
|
2583 }
|
|
2584
|
|
2585
|
200
|
2586 static char *
|
|
2587 ngx_http_upstream(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy)
|
|
2588 {
|
|
2589 char *rv;
|
|
2590 void *mconf;
|
|
2591 ngx_str_t *value;
|
|
2592 ngx_url_t u;
|
|
2593 ngx_uint_t i, j, m, n;
|
|
2594 ngx_conf_t pcf;
|
|
2595 ngx_peers_t **peers;
|
|
2596 ngx_http_module_t *module;
|
|
2597 ngx_http_conf_ctx_t *ctx;
|
|
2598 ngx_http_upstream_srv_conf_t *uscf;
|
|
2599
|
|
2600 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t));
|
|
2601 if (ctx == NULL) {
|
|
2602 return NGX_CONF_ERROR;
|
|
2603 }
|
|
2604
|
|
2605 ngx_memzero(&u, sizeof(ngx_url_t));
|
|
2606
|
|
2607 value = cf->args->elts;
|
|
2608 u.host = value[1];
|
|
2609
|
|
2610 uscf = ngx_http_upstream_add(cf, &u);
|
|
2611 if (uscf == NULL) {
|
|
2612 return NGX_CONF_ERROR;
|
|
2613 }
|
|
2614
|
|
2615 /* the upstream{}'s srv_conf */
|
|
2616
|
|
2617 ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
|
|
2618 if (ctx->srv_conf == NULL) {
|
|
2619 return NGX_CONF_ERROR;
|
|
2620 }
|
|
2621
|
|
2622 ctx->srv_conf[ngx_http_upstream_module.ctx_index] = uscf;
|
|
2623
|
|
2624
|
|
2625 /* the upstream{}'s loc_conf */
|
|
2626
|
|
2627 ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
|
|
2628 if (ctx->loc_conf == NULL) {
|
|
2629 return NGX_CONF_ERROR;
|
|
2630 }
|
|
2631
|
|
2632 for (m = 0; ngx_modules[m]; m++) {
|
|
2633 if (ngx_modules[m]->type != NGX_HTTP_MODULE) {
|
|
2634 continue;
|
|
2635 }
|
|
2636
|
|
2637 module = ngx_modules[m]->ctx;
|
|
2638
|
|
2639 if (module->create_loc_conf) {
|
|
2640 mconf = module->create_loc_conf(cf);
|
|
2641 if (mconf == NULL) {
|
|
2642 return NGX_CONF_ERROR;
|
|
2643 }
|
|
2644
|
|
2645 ctx->loc_conf[ngx_modules[m]->ctx_index] = mconf;
|
|
2646 }
|
|
2647 }
|
|
2648
|
|
2649
|
|
2650 /* parse inside upstream{} */
|
|
2651
|
|
2652 pcf = *cf;
|
|
2653 cf->ctx = ctx;
|
|
2654 cf->cmd_type = NGX_HTTP_UPS_CONF;
|
|
2655
|
|
2656 rv = ngx_conf_parse(cf, NULL);
|
|
2657
|
|
2658 *cf = pcf;
|
|
2659
|
|
2660 if (rv != NGX_CONF_OK) {
|
|
2661 return rv;
|
|
2662 }
|
|
2663
|
|
2664 if (uscf->servers == NULL) {
|
|
2665 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
2666 "no servers are inside upstream");
|
|
2667 return NGX_CONF_ERROR;
|
|
2668 }
|
|
2669
|
|
2670 peers = uscf->servers->elts;
|
|
2671
|
|
2672 if (uscf->servers->nelts == 1) {
|
|
2673 uscf->peers = peers[0];
|
|
2674 }
|
|
2675
|
|
2676 n = 0;
|
|
2677
|
|
2678 for (i = 0; i < uscf->servers->nelts; i++) {
|
|
2679 n += peers[i]->number;
|
|
2680 }
|
|
2681
|
|
2682 uscf->peers = ngx_pcalloc(cf->pool,
|
|
2683 sizeof(ngx_peers_t) + sizeof(ngx_peer_t) * (n - 1));
|
|
2684 if (uscf->peers == NULL) {
|
|
2685 return NGX_CONF_ERROR;
|
|
2686 }
|
|
2687
|
|
2688 uscf->peers->number = n;
|
|
2689 uscf->peers->weight = 1;
|
|
2690
|
|
2691 n = 0;
|
|
2692
|
|
2693 for (i = 0; i < uscf->servers->nelts; i++) {
|
|
2694 for (j = 0; j < peers[i]->number; j++) {
|
|
2695 uscf->peers->peer[n++] = peers[i]->peer[j];
|
|
2696 }
|
|
2697 }
|
|
2698
|
|
2699 return rv;
|
|
2700 }
|
|
2701
|
|
2702
|
|
2703 static char *
|
|
2704 ngx_http_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
2705 {
|
|
2706 ngx_http_upstream_srv_conf_t *uscf = conf;
|
|
2707
|
|
2708 ngx_str_t *value;
|
|
2709 ngx_url_t u;
|
|
2710 ngx_peers_t **peers;
|
|
2711
|
|
2712 if (uscf->servers == NULL) {
|
|
2713 uscf->servers = ngx_array_create(cf->pool, 4, sizeof(ngx_peers_t *));
|
|
2714 if (uscf->servers == NULL) {
|
|
2715 return NGX_CONF_ERROR;
|
|
2716 }
|
|
2717 }
|
|
2718
|
|
2719 peers = ngx_array_push(uscf->servers);
|
|
2720 if (peers == NULL) {
|
|
2721 return NGX_CONF_ERROR;
|
|
2722 }
|
|
2723
|
|
2724 value = cf->args->elts;
|
|
2725
|
|
2726 ngx_memzero(&u, sizeof(ngx_url_t));
|
|
2727
|
|
2728 u.url = value[1];
|
|
2729 u.default_portn = 80;
|
|
2730
|
|
2731 if (ngx_parse_url(cf, &u) != NGX_OK) {
|
|
2732 if (u.err) {
|
|
2733 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
2734 "%s in upstream \"%V\"", u.err, &u.url);
|
|
2735 }
|
|
2736
|
|
2737 return NGX_CONF_ERROR;
|
|
2738 }
|
|
2739
|
|
2740 *peers = u.peers;
|
|
2741
|
|
2742 return NGX_CONF_OK;
|
|
2743 }
|
|
2744
|
|
2745
|
|
2746 ngx_http_upstream_srv_conf_t *
|
|
2747 ngx_http_upstream_add(ngx_conf_t *cf, ngx_url_t *u)
|
|
2748 {
|
|
2749 ngx_uint_t i;
|
|
2750 ngx_http_upstream_srv_conf_t *uscf, **uscfp;
|
|
2751 ngx_http_upstream_main_conf_t *umcf;
|
|
2752
|
|
2753 if (u->upstream) {
|
|
2754 if (ngx_parse_url(cf, u) != NGX_OK) {
|
|
2755 if (u->err) {
|
|
2756 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
2757 "%s in upstream \"%V\"", u->err, &u->url);
|
|
2758 }
|
|
2759
|
|
2760 return NULL;
|
|
2761 }
|
|
2762
|
|
2763 if (u->peers) {
|
|
2764 uscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_srv_conf_t));
|
|
2765 if (uscf == NULL) {
|
|
2766 return NULL;
|
|
2767 }
|
|
2768
|
|
2769 uscf->peers = u->peers;
|
|
2770
|
|
2771 return uscf;
|
|
2772 }
|
|
2773 }
|
|
2774
|
|
2775 umcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_upstream_module);
|
|
2776
|
|
2777 uscfp = umcf->upstreams.elts;
|
|
2778
|
|
2779 for (i = 0; i < umcf->upstreams.nelts; i++) {
|
|
2780 if (uscfp[i]->host.len != u->host.len) {
|
|
2781 continue;
|
|
2782 }
|
|
2783
|
|
2784 if (ngx_strncasecmp(uscfp[i]->host.data, u->host.data, u->host.len)
|
|
2785 == 0)
|
|
2786 {
|
|
2787 return uscfp[i];
|
|
2788 }
|
|
2789 }
|
|
2790
|
|
2791 uscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_srv_conf_t));
|
|
2792 if (uscf == NULL) {
|
|
2793 return NULL;
|
|
2794 }
|
|
2795
|
|
2796 uscf->host = u->host;
|
|
2797 uscf->file_name = cf->conf_file->file.name;
|
|
2798 uscf->line = cf->conf_file->line;
|
|
2799 uscf->port = u->default_portn;
|
|
2800
|
|
2801 uscfp = ngx_array_push(&umcf->upstreams);
|
|
2802 if (uscfp == NULL) {
|
|
2803 return NULL;
|
|
2804 }
|
|
2805
|
|
2806 *uscfp = uscf;
|
|
2807
|
|
2808 return uscf;
|
|
2809 }
|
|
2810
|
|
2811
|
58
|
2812 static void *
|
|
2813 ngx_http_upstream_create_main_conf(ngx_conf_t *cf)
|
|
2814 {
|
|
2815 ngx_http_upstream_main_conf_t *umcf;
|
|
2816
|
|
2817 umcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_main_conf_t));
|
|
2818 if (umcf == NULL) {
|
|
2819 return NULL;
|
|
2820 }
|
|
2821
|
200
|
2822 if (ngx_array_init(&umcf->upstreams, cf->pool, 4,
|
|
2823 sizeof(ngx_http_upstream_srv_conf_t *))
|
|
2824 != NGX_OK)
|
|
2825 {
|
|
2826 return NGX_CONF_ERROR;
|
|
2827 }
|
|
2828
|
58
|
2829 return umcf;
|
|
2830 }
|
|
2831
|
|
2832
|
|
2833 static char *
|
200
|
2834 ngx_http_upstream_init_main_conf(ngx_conf_t *cf, void *conf)
|
58
|
2835 {
|
|
2836 ngx_http_upstream_main_conf_t *umcf = conf;
|
|
2837
|
200
|
2838 ngx_uint_t i;
|
|
2839 ngx_array_t headers_in;
|
|
2840 ngx_hash_key_t *hk;
|
|
2841 ngx_hash_init_t hash;
|
|
2842 ngx_http_upstream_header_t *header;
|
|
2843 ngx_http_upstream_srv_conf_t **uscfp;
|
|
2844
|
|
2845 uscfp = umcf->upstreams.elts;
|
|
2846
|
|
2847 for (i = 0; i < umcf->upstreams.nelts; i++) {
|
|
2848 if (uscfp[i]->peers) {
|
|
2849 continue;
|
|
2850 }
|
|
2851
|
|
2852 uscfp[i]->peers = ngx_inet_resolve_peer(cf, &uscfp[i]->host,
|
|
2853 uscfp[i]->port);
|
|
2854
|
|
2855 if (uscfp[i]->peers == NULL) {
|
|
2856 return NGX_CONF_ERROR;
|
|
2857 }
|
|
2858
|
|
2859 if (uscfp[i]->peers == NGX_CONF_ERROR) {
|
|
2860 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
|
|
2861 "upstream host \"%V\" is not found in %s:%ui",
|
|
2862 &uscfp[i]->host, uscfp[i]->file_name.data,
|
|
2863 uscfp[i]->line);
|
|
2864 return NGX_CONF_ERROR;
|
|
2865 }
|
|
2866 }
|
198
|
2867
|
|
2868 if (ngx_array_init(&headers_in, cf->temp_pool, 32, sizeof(ngx_hash_key_t))
|
|
2869 != NGX_OK)
|
58
|
2870 {
|
|
2871 return NGX_CONF_ERROR;
|
|
2872 }
|
|
2873
|
198
|
2874 for (header = ngx_http_upstream_headers_in; header->name.len; header++) {
|
|
2875 hk = ngx_array_push(&headers_in);
|
|
2876 if (hk == NULL) {
|
|
2877 return NGX_CONF_ERROR;
|
|
2878 }
|
|
2879
|
|
2880 hk->key = header->name;
|
|
2881 hk->key_hash = ngx_hash_key_lc(header->name.data, header->name.len);
|
|
2882 hk->value = header;
|
|
2883 }
|
|
2884
|
|
2885 hash.hash = &umcf->headers_in_hash;
|
|
2886 hash.key = ngx_hash_key_lc;
|
|
2887 hash.max_size = 512;
|
|
2888 hash.bucket_size = ngx_cacheline_size;
|
|
2889 hash.name = "upstream_headers_in_hash";
|
|
2890 hash.pool = cf->pool;
|
|
2891 hash.temp_pool = NULL;
|
|
2892
|
|
2893 if (ngx_hash_init(&hash, headers_in.elts, headers_in.nelts) != NGX_OK) {
|
|
2894 return NGX_CONF_ERROR;
|
|
2895 }
|
58
|
2896
|
|
2897 return NGX_CONF_OK;
|
|
2898 }
|