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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58
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9 #include <ngx_event_connect.h>
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28
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10 #include <ngx_http.h>
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11
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12
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58
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13 static void ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r);
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14 static void ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r);
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15 static void ngx_http_upstream_check_broken_connection(ngx_http_request_t *r,
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16 ngx_event_t *ev);
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28
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17 static void ngx_http_upstream_connect(ngx_http_request_t *r,
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36
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18 ngx_http_upstream_t *u);
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58
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19 static ngx_int_t ngx_http_upstream_reinit(ngx_http_request_t *r,
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36
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20 ngx_http_upstream_t *u);
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28
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21 static void ngx_http_upstream_send_request(ngx_http_request_t *r,
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22 ngx_http_upstream_t *u);
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28
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23 static void ngx_http_upstream_send_request_handler(ngx_event_t *wev);
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24 static void ngx_http_upstream_process_header(ngx_event_t *rev);
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25 static void ngx_http_upstream_send_response(ngx_http_request_t *r,
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36
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26 ngx_http_upstream_t *u);
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58
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27 static void ngx_http_upstream_process_downstream(ngx_http_request_t *r);
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28
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28 static void ngx_http_upstream_process_body(ngx_event_t *ev);
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29 static void ngx_http_upstream_dummy_handler(ngx_event_t *wev);
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30 static void ngx_http_upstream_next(ngx_http_request_t *r,
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31 ngx_http_upstream_t *u, ngx_uint_t ft_type);
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118
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32 static void ngx_http_upstream_cleanup(void *data);
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28
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33 static void ngx_http_upstream_finalize_request(ngx_http_request_t *r,
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36
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34 ngx_http_upstream_t *u, ngx_int_t rc);
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28
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35
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58
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36 static ngx_int_t ngx_http_upstream_process_header_line(ngx_http_request_t *r,
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37 ngx_table_elt_t *h, ngx_uint_t offset);
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38 static ngx_int_t
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39 ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
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40 ngx_table_elt_t *h, ngx_uint_t offset);
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41 static ngx_int_t ngx_http_upstream_ignore_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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76
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43 static ngx_int_t ngx_http_upstream_process_limit_rate(ngx_http_request_t *r,
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44 ngx_table_elt_t *h, ngx_uint_t offset);
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58
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45 static ngx_int_t ngx_http_upstream_copy_header_line(ngx_http_request_t *r,
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46 ngx_table_elt_t *h, ngx_uint_t offset);
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47 static ngx_int_t
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48 ngx_http_upstream_conditional_copy_header_line(ngx_http_request_t *r,
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49 ngx_table_elt_t *h, ngx_uint_t offset);
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50 static ngx_int_t
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51 ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r,
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52 ngx_table_elt_t *h, ngx_uint_t offset);
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53 static ngx_int_t ngx_http_upstream_copy_content_type(ngx_http_request_t *r,
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54 ngx_table_elt_t *h, ngx_uint_t offset);
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55 static ngx_int_t ngx_http_upstream_copy_content_length(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_rewrite_location(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_rewrite_refresh(ngx_http_request_t *r,
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60 ngx_table_elt_t *h, ngx_uint_t offset);
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61 #if (NGX_HTTP_GZIP)
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62 static ngx_int_t ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r,
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63 ngx_table_elt_t *h, ngx_uint_t offset);
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64 #endif
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65
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28
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66 static size_t ngx_http_upstream_log_status_getlen(ngx_http_request_t *r,
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36
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67 uintptr_t data);
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68 static u_char *ngx_http_upstream_log_status(ngx_http_request_t *r,
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69 u_char *buf, ngx_http_log_op_t *op);
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122
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70 static size_t ngx_http_upstream_log_response_time_getlen(ngx_http_request_t *r,
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71 uintptr_t data);
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112
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72 static u_char *ngx_http_upstream_log_response_time(ngx_http_request_t *r,
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73 u_char *buf, ngx_http_log_op_t *op);
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74
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58
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75 static u_char *ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf,
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76 size_t len);
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122
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77
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78 static ngx_int_t ngx_http_upstream_add_variables(ngx_conf_t *cf);
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79 static ngx_int_t ngx_http_upstream_status_variable(ngx_http_request_t *r,
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80 ngx_http_variable_value_t *v, uintptr_t data);
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81 static ngx_int_t ngx_http_upstream_response_time_variable(ngx_http_request_t *r,
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82 ngx_http_variable_value_t *v, uintptr_t data);
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83
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58
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84 static void *ngx_http_upstream_create_main_conf(ngx_conf_t *cf);
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85 static char *ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf);
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86
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87
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88 ngx_http_upstream_header_t ngx_http_upstream_headers_in[] = {
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89
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90 { ngx_string("Status"),
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91 ngx_http_upstream_process_header_line,
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92 offsetof(ngx_http_upstream_headers_in_t, status),
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64
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93 /* STUB */ ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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94
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95 { ngx_string("Content-Type"),
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96 ngx_http_upstream_process_header_line,
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97 offsetof(ngx_http_upstream_headers_in_t, content_type),
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98 ngx_http_upstream_copy_content_type, 0, 0 },
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58
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99
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100 { ngx_string("Content-Length"),
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101 ngx_http_upstream_process_header_line,
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102 offsetof(ngx_http_upstream_headers_in_t, content_length),
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103 ngx_http_upstream_copy_content_length, 0, 0 },
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104
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105 { ngx_string("Date"),
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106 ngx_http_upstream_process_header_line,
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107 offsetof(ngx_http_upstream_headers_in_t, date),
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108 ngx_http_upstream_conditional_copy_header_line,
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109 offsetof(ngx_http_upstream_conf_t, pass_date), 0 },
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58
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110
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111 { ngx_string("Server"),
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112 ngx_http_upstream_process_header_line,
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113 offsetof(ngx_http_upstream_headers_in_t, server),
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114 ngx_http_upstream_conditional_copy_header_line,
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115 offsetof(ngx_http_upstream_conf_t, pass_server), 0 },
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116
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78
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117 { ngx_string("WWW-Authenticate"),
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118 ngx_http_upstream_process_header_line,
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119 offsetof(ngx_http_upstream_headers_in_t, www_authenticate),
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120 ngx_http_upstream_copy_header_line, 0, 0 },
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121
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58
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122 { ngx_string("Location"),
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123 ngx_http_upstream_ignore_header_line, 0,
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124 ngx_http_upstream_rewrite_location, 0, 0 },
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125
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126 { ngx_string("Refresh"),
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127 ngx_http_upstream_ignore_header_line, 0,
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64
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128 ngx_http_upstream_rewrite_refresh, 0, 0 },
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129
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130 { ngx_string("Set-Cookie"),
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131 ngx_http_upstream_ignore_header_line, 0,
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80
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132 ngx_http_upstream_copy_header_line, 0, 1 },
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133
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134 { ngx_string("Content-Disposition"),
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135 ngx_http_upstream_ignore_header_line, 0,
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136 ngx_http_upstream_copy_header_line, 0, 1 },
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58
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137
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138 { ngx_string("Cache-Control"),
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139 ngx_http_upstream_process_multi_header_lines,
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140 offsetof(ngx_http_upstream_headers_in_t, cache_control),
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141 ngx_http_upstream_copy_multi_header_lines,
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64
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142 offsetof(ngx_http_headers_out_t, cache_control), 1 },
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58
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143
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122
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144 { ngx_string("Expires"),
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145 ngx_http_upstream_process_header_line,
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146 offsetof(ngx_http_upstream_headers_in_t, expires),
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147 ngx_http_upstream_copy_header_line,
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148 offsetof(ngx_http_headers_out_t, expires), 1 },
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149
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58
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150 { ngx_string("Connection"),
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151 ngx_http_upstream_ignore_header_line, 0,
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152 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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153
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154 { ngx_string("X-Pad"),
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155 ngx_http_upstream_ignore_header_line, 0,
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156 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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157
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158 { ngx_string("X-Powered-By"),
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159 ngx_http_upstream_ignore_header_line, 0,
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160 ngx_http_upstream_conditional_copy_header_line,
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161 offsetof(ngx_http_upstream_conf_t, pass_x_powered_by), 0 },
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162
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163 { ngx_string("X-Accel-Expires"),
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164 ngx_http_upstream_process_header_line,
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165 offsetof(ngx_http_upstream_headers_in_t, x_accel_expires),
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166 ngx_http_upstream_conditional_copy_header_line,
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167 offsetof(ngx_http_upstream_conf_t, pass_x_accel_expires), 0 },
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168
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169 { ngx_string("X-Accel-Redirect"),
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170 ngx_http_upstream_process_header_line,
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171 offsetof(ngx_http_upstream_headers_in_t, x_accel_redirect),
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172 ngx_http_upstream_ignore_header_line, 0, 0 },
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173
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76
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174 { ngx_string("X-Accel-Limit-Rate"),
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175 ngx_http_upstream_process_limit_rate, 0,
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176 ngx_http_upstream_ignore_header_line, 0, 0 },
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177
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58
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178 #if (NGX_HTTP_GZIP)
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179 { ngx_string("Content-Encoding"),
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180 ngx_http_upstream_process_header_line,
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181 offsetof(ngx_http_upstream_headers_in_t, content_encoding),
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182 ngx_http_upstream_copy_content_encoding, 0, 0 },
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183 #endif
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184
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64
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185 { ngx_null_string, NULL, 0, NULL, 0, 0 }
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186 };
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187
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188
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189 ngx_http_module_t ngx_http_upstream_module_ctx = {
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190 ngx_http_upstream_add_variables, /* preconfiguration */
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191 NULL, /* postconfiguration */
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192
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193 ngx_http_upstream_create_main_conf, /* create main configuration */
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194 ngx_http_core_init_main_conf, /* init main configuration */
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195
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196 NULL, /* create server configuration */
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197 NULL, /* merge server configuration */
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198
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199 NULL, /* create location configuration */
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200 NULL /* merge location configuration */
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201 };
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202
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203
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204 ngx_module_t ngx_http_upstream_module = {
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205 NGX_MODULE_V1,
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206 &ngx_http_upstream_module_ctx, /* module context */
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207 NULL, /* module directives */
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208 NGX_HTTP_MODULE, /* module type */
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90
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209 NULL, /* init master */
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210 NULL, /* init module */
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90
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211 NULL, /* init process */
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212 NULL, /* init thread */
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213 NULL, /* exit thread */
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214 NULL, /* exit process */
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215 NULL, /* exit master */
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216 NGX_MODULE_V1_PADDING
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217 };
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218
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219
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220 static ngx_http_log_op_name_t ngx_http_upstream_log_fmt_ops[] = {
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221 { ngx_string("upstream_status"), 0, NULL,
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122
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222 ngx_http_upstream_log_status_getlen,
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223 ngx_http_upstream_log_status },
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224 { ngx_string("upstream_response_time"), 0, NULL,
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225 ngx_http_upstream_log_response_time_getlen,
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226 ngx_http_upstream_log_response_time },
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28
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227 { ngx_null_string, 0, NULL, NULL, NULL }
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228 };
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229
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230
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122
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231 static ngx_http_variable_t ngx_http_upstream_vars[] = {
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232
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233 { ngx_string("upstream_status"),
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234 ngx_http_upstream_status_variable, 0, 0, 0 },
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235
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236 { ngx_string("upstream_response_time"),
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237 ngx_http_upstream_response_time_variable, 0, 0, 0 },
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238
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239 { ngx_null_string, NULL, 0, 0, 0 }
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240 };
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241
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242
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28
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243 char *ngx_http_upstream_header_errors[] = {
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244 "upstream sent invalid header",
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245 "upstream sent too long header line"
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246 };
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247
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248
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36
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249 void
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250 ngx_http_upstream_init(ngx_http_request_t *r)
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251 {
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252 ngx_time_t *tp;
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253 ngx_connection_t *c;
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254 ngx_http_cleanup_t *cln;
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255 ngx_http_upstream_t *u;
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256 ngx_http_core_loc_conf_t *clcf;
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257
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258 c = r->connection;
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259
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260 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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261 "http init upstream, client timer: %d", c->read->timer_set);
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262
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263 if (c->read->timer_set) {
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264 ngx_del_timer(c->read);
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265 }
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266
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267 r->read_event_handler = ngx_http_upstream_rd_check_broken_connection;
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268 r->write_event_handler = ngx_http_upstream_wr_check_broken_connection;
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269
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270 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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271
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272 if (!c->write->active) {
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80
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273 if (ngx_add_event(c->write, NGX_WRITE_EVENT, NGX_CLEAR_EVENT)
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274 == NGX_ERROR)
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28
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275 {
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276 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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277 return;
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278 }
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279 }
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280 }
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281
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282 u = r->upstream;
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283
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86
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284 if (r->request_body) {
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285 u->request_bufs = r->request_body->bufs;
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286 }
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287
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86
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288 if (u->create_request(r) != NGX_OK) {
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289 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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290 return;
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291 }
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292
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293 u->peer.log = r->connection->log;
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294 u->saved_log_handler = r->log_handler;
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295 r->log_handler = ngx_http_upstream_log_error;
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296
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297 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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28
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298
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299 u->output.sendfile = r->connection->sendfile;
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300 u->output.pool = r->pool;
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301 u->output.bufs.num = 1;
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302 u->output.bufs.size = clcf->client_body_buffer_size;
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303 u->output.output_filter = ngx_chain_writer;
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304 u->output.filter_ctx = &u->writer;
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305
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306 u->writer.pool = r->pool;
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307
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308 if (ngx_array_init(&u->states, r->pool, u->peer.peers->number,
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118
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309 sizeof(ngx_http_upstream_state_t))
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310 != NGX_OK)
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28
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311 {
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312 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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313 return;
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314 }
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315
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50
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316 u->state = ngx_array_push(&u->states);
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317 if (u->state == NULL) {
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28
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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 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
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323
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112
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324 tp = ngx_timeofday();
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325
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326 u->state->response_time = tp->sec * 1000 + tp->msec;
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327
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118
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328 cln = ngx_http_cleanup_add(r, sizeof(void *));
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329 if (cln == NULL) {
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330 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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331 return;
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332 }
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333
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334 cln->handler = ngx_http_upstream_cleanup;
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335 cln->data = r;
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336 u->cleanup = &cln->handler;
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337
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28
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338 ngx_http_upstream_connect(r, u);
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339 }
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340
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341
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36
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342 static void
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58
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343 ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r)
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344 {
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345 ngx_http_upstream_check_broken_connection(r, r->connection->read);
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346 }
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347
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348
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349 static void
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350 ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r)
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351 {
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352 ngx_http_upstream_check_broken_connection(r, r->connection->write);
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353 }
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354
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355
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356 static void
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357 ngx_http_upstream_check_broken_connection(ngx_http_request_t *r,
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358 ngx_event_t *ev)
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28
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359 {
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360 int n;
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361 char buf[1];
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362 ngx_err_t err;
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363 ngx_connection_t *c;
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364 ngx_http_upstream_t *u;
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365
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76
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366 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ev->log, 0,
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367 "http upstream check client, write event:%d, \"%V\"",
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368 ev->write, &r->uri);
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28
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369
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58
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370 c = r->connection;
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32
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371 u = r->upstream;
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372
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76
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373 if (c->closed) {
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374 ngx_http_upstream_finalize_request(r, u,
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375 NGX_HTTP_CLIENT_CLOSED_REQUEST);
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376 return;
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377 }
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378
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32
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379 if (u->peer.connection == NULL) {
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380 return;
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381 }
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382
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28
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383 #if (NGX_HAVE_KQUEUE)
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|
384
|
|
385 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
|
386
|
|
387 if (!ev->pending_eof) {
|
|
388 return;
|
|
389 }
|
|
390
|
|
391 ev->eof = 1;
|
76
|
392 c->closed = 1;
|
28
|
393
|
|
394 if (ev->kq_errno) {
|
|
395 ev->error = 1;
|
|
396 }
|
|
397
|
|
398 if (!u->cachable && u->peer.connection) {
|
|
399 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
|
76
|
400 "kevent() reported that client closed prematurely "
|
|
401 "connection, so upstream connection is closed too");
|
28
|
402 ngx_http_upstream_finalize_request(r, u,
|
|
403 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
404 return;
|
|
405 }
|
|
406
|
|
407 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
|
|
408 "kevent() reported that client closed "
|
|
409 "prematurely connection");
|
|
410
|
|
411 if (u->peer.connection == NULL) {
|
|
412 ngx_http_upstream_finalize_request(r, u,
|
|
413 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
414 return;
|
|
415 }
|
|
416
|
|
417 return;
|
|
418 }
|
|
419
|
|
420 #endif
|
|
421
|
|
422 n = recv(c->fd, buf, 1, MSG_PEEK);
|
|
423
|
|
424 err = ngx_socket_errno;
|
|
425
|
|
426 /*
|
|
427 * we do not need to disable the write event because
|
|
428 * that event has NGX_USE_CLEAR_EVENT type
|
|
429 */
|
|
430
|
|
431 if (ev->write && (n >= 0 || err == NGX_EAGAIN)) {
|
|
432 return;
|
|
433 }
|
|
434
|
|
435 if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && ev->active) {
|
|
436 if (ngx_del_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) {
|
|
437 ngx_http_upstream_finalize_request(r, u,
|
|
438 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
439 return;
|
|
440 }
|
|
441 }
|
|
442
|
|
443 if (n > 0) {
|
|
444 return;
|
|
445 }
|
|
446
|
|
447 if (n == -1) {
|
|
448 if (err == NGX_EAGAIN) {
|
|
449 return;
|
|
450 }
|
|
451
|
|
452 ev->error = 1;
|
|
453
|
32
|
454 } else { /* n == 0 */
|
28
|
455 err = 0;
|
|
456 }
|
|
457
|
78
|
458 ev->eof = 1;
|
|
459 c->closed = 1;
|
|
460
|
28
|
461 if (!u->cachable && u->peer.connection) {
|
|
462 ngx_log_error(NGX_LOG_INFO, ev->log, err,
|
|
463 "client closed prematurely connection, "
|
|
464 "so upstream connection is closed too");
|
|
465 ngx_http_upstream_finalize_request(r, u,
|
|
466 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
467 return;
|
|
468 }
|
|
469
|
|
470 ngx_log_error(NGX_LOG_INFO, ev->log, err,
|
|
471 "client closed prematurely connection");
|
|
472
|
|
473 if (u->peer.connection == NULL) {
|
|
474 ngx_http_upstream_finalize_request(r, u,
|
|
475 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
476 return;
|
|
477 }
|
|
478 }
|
|
479
|
|
480
|
36
|
481 static void
|
|
482 ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
28
|
483 {
|
|
484 ngx_int_t rc;
|
|
485 ngx_connection_t *c;
|
|
486
|
32
|
487 r->connection->log->action = "connecting to upstream";
|
28
|
488
|
|
489 r->connection->single_connection = 0;
|
|
490
|
|
491 rc = ngx_event_connect_peer(&u->peer);
|
|
492
|
|
493 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
494 "http upstream connect: %i", rc);
|
|
495
|
|
496 if (rc == NGX_ERROR) {
|
|
497 ngx_http_upstream_finalize_request(r, u,
|
|
498 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
499 return;
|
|
500 }
|
|
501
|
|
502 u->state->peer = &u->peer.peers->peer[u->peer.cur_peer].name;
|
|
503
|
92
|
504 if (rc == NGX_BUSY) {
|
|
505 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams");
|
|
506 }
|
|
507
|
|
508 if (rc == NGX_BUSY || rc == NGX_DECLINED) {
|
28
|
509 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
510 return;
|
|
511 }
|
|
512
|
|
513 c = u->peer.connection;
|
|
514
|
|
515 c->data = r;
|
58
|
516 c->write->handler = ngx_http_upstream_send_request_handler;
|
|
517 c->read->handler = ngx_http_upstream_process_header;
|
28
|
518
|
|
519 c->sendfile = r->connection->sendfile;
|
|
520
|
|
521 c->pool = r->pool;
|
|
522 c->read->log = c->write->log = c->log = r->connection->log;
|
|
523
|
|
524 /* init or reinit the ngx_output_chain() and ngx_chain_writer() contexts */
|
|
525
|
|
526 u->writer.out = NULL;
|
|
527 u->writer.last = &u->writer.out;
|
|
528 u->writer.connection = c;
|
|
529 u->writer.limit = 0;
|
|
530
|
|
531 if (u->request_sent) {
|
58
|
532 if (ngx_http_upstream_reinit(r, u) != NGX_OK) {
|
|
533 ngx_http_upstream_finalize_request(r, u,
|
|
534 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
535 return;
|
|
536 }
|
28
|
537 }
|
|
538
|
122
|
539 if (r->request_body && r->request_body->temp_file && r->main == r) {
|
|
540
|
|
541 /*
|
|
542 * the r->request_body->buf can be reused for one request only,
|
|
543 * the subrequests should allocate their own temporay bufs
|
|
544 */
|
|
545
|
|
546 u->output.free = ngx_alloc_chain_link(r->pool);
|
|
547 if (u->output.free == NULL) {
|
|
548 ngx_http_upstream_finalize_request(r, u,
|
|
549 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
550 return;
|
28
|
551 }
|
122
|
552
|
|
553 u->output.free->buf = r->request_body->buf;
|
|
554 u->output.free->next = NULL;
|
|
555 u->output.allocated = 1;
|
|
556
|
|
557 r->request_body->buf->pos = r->request_body->buf->start;
|
|
558 r->request_body->buf->last = r->request_body->buf->start;
|
|
559 r->request_body->buf->tag = u->output.tag;
|
28
|
560 }
|
|
561
|
|
562 u->request_sent = 0;
|
|
563
|
|
564 if (rc == NGX_AGAIN) {
|
|
565 ngx_add_timer(c->write, u->conf->connect_timeout);
|
|
566 return;
|
|
567 }
|
|
568
|
|
569 /* rc == NGX_OK */
|
|
570
|
|
571 ngx_http_upstream_send_request(r, u);
|
|
572 }
|
|
573
|
|
574
|
58
|
575 static ngx_int_t
|
36
|
576 ngx_http_upstream_reinit(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
28
|
577 {
|
|
578 ngx_chain_t *cl;
|
|
579
|
58
|
580 if (u->reinit_request(r) != NGX_OK) {
|
|
581 return NGX_ERROR;
|
|
582 }
|
|
583
|
|
584 ngx_memzero(&r->upstream->headers_in,
|
|
585 sizeof(ngx_http_upstream_headers_in_t));
|
|
586
|
|
587 if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8,
|
|
588 sizeof(ngx_table_elt_t)) != NGX_OK)
|
|
589 {
|
|
590 return NGX_ERROR;
|
28
|
591 }
|
|
592
|
|
593 /* reinit the request chain */
|
|
594
|
58
|
595 for (cl = u->request_bufs; cl; cl = cl->next) {
|
28
|
596 cl->buf->pos = cl->buf->start;
|
|
597 cl->buf->file_pos = 0;
|
|
598 }
|
|
599
|
58
|
600 /* reinit the subrequest's ngx_output_chain() context */
|
|
601
|
122
|
602 if (r->request_body && r->request_body->temp_file
|
|
603 && r->main != r && u->output.buf)
|
|
604 {
|
|
605 u->output.free = ngx_alloc_chain_link(r->pool);
|
|
606 if (u->output.free == NULL) {
|
|
607 return NGX_ERROR;
|
58
|
608 }
|
122
|
609
|
|
610 u->output.free->buf = u->output.buf;
|
|
611 u->output.free->next = NULL;
|
|
612
|
|
613 u->output.buf->pos = u->output.buf->start;
|
|
614 u->output.buf->last = u->output.buf->start;
|
58
|
615 }
|
28
|
616
|
|
617 u->output.buf = NULL;
|
|
618 u->output.in = NULL;
|
|
619 u->output.busy = NULL;
|
|
620
|
|
621 /* reinit u->header_in buffer */
|
|
622
|
|
623 #if 0
|
|
624 if (u->cache) {
|
|
625 u->header_in.pos = u->header_in.start + u->cache->ctx.header_size;
|
|
626 u->header_in.last = u->header_in.pos;
|
|
627
|
|
628 } else {
|
|
629 u->header_in.pos = u->header_in.start;
|
|
630 u->header_in.last = u->header_in.start;
|
|
631 }
|
|
632 #else
|
58
|
633
|
28
|
634 u->header_in.pos = u->header_in.start;
|
|
635 u->header_in.last = u->header_in.start;
|
58
|
636
|
28
|
637 #endif
|
|
638
|
|
639 /* add one more state */
|
|
640
|
50
|
641 u->state = ngx_array_push(&u->states);
|
|
642 if (u->state == NULL) {
|
58
|
643 return NGX_ERROR;
|
28
|
644 }
|
|
645
|
|
646 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
|
58
|
647
|
|
648 return NGX_OK;
|
28
|
649 }
|
|
650
|
|
651
|
36
|
652 static void
|
|
653 ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
28
|
654 {
|
32
|
655 int rc;
|
|
656 ngx_connection_t *c;
|
28
|
657
|
|
658 c = u->peer.connection;
|
|
659
|
|
660 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
661 "http upstream send request");
|
|
662
|
|
663 #if (NGX_HAVE_KQUEUE)
|
|
664
|
|
665 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT)
|
|
666 && !u->request_sent
|
|
667 && c->write->pending_eof)
|
|
668 {
|
86
|
669 (void) ngx_connection_error(c, c->write->kq_errno,
|
|
670 "kevent() reported that connect() failed");
|
28
|
671 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
672 return;
|
|
673 }
|
|
674
|
|
675 #endif
|
|
676
|
32
|
677 c->log->action = "sending request to upstream";
|
28
|
678
|
58
|
679 rc = ngx_output_chain(&u->output, u->request_sent ? NULL : u->request_bufs);
|
28
|
680
|
|
681 u->request_sent = 1;
|
|
682
|
|
683 if (rc == NGX_ERROR) {
|
|
684 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
685 return;
|
|
686 }
|
|
687
|
|
688 if (c->write->timer_set) {
|
|
689 ngx_del_timer(c->write);
|
|
690 }
|
|
691
|
|
692 if (rc == NGX_AGAIN) {
|
|
693 ngx_add_timer(c->write, u->conf->send_timeout);
|
|
694
|
|
695 if (ngx_handle_write_event(c->write, u->conf->send_lowat) == NGX_ERROR)
|
|
696 {
|
|
697 ngx_http_upstream_finalize_request(r, u,
|
|
698 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
699 return;
|
|
700 }
|
|
701
|
|
702 return;
|
|
703 }
|
|
704
|
|
705 /* rc == NGX_OK */
|
|
706
|
|
707 if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) {
|
|
708 if (ngx_tcp_push(c->fd) == NGX_ERROR) {
|
|
709 ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno,
|
|
710 ngx_tcp_push_n " failed");
|
|
711 ngx_http_upstream_finalize_request(r, u,
|
|
712 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
713 return;
|
|
714 }
|
|
715
|
|
716 c->tcp_nopush = NGX_TCP_NOPUSH_UNSET;
|
|
717 }
|
|
718
|
|
719 ngx_add_timer(c->read, u->conf->read_timeout);
|
|
720
|
|
721 #if 1
|
|
722 if (c->read->ready) {
|
|
723
|
|
724 /* post aio operation */
|
|
725
|
|
726 /*
|
|
727 * TODO comment
|
|
728 * although we can post aio operation just in the end
|
|
729 * of ngx_http_upstream_connect() CHECK IT !!!
|
|
730 * it's better to do here because we postpone header buffer allocation
|
|
731 */
|
|
732
|
|
733 ngx_http_upstream_process_header(c->read);
|
|
734 return;
|
|
735 }
|
|
736 #endif
|
|
737
|
58
|
738 c->write->handler = ngx_http_upstream_dummy_handler;
|
28
|
739
|
58
|
740 if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
|
28
|
741 ngx_http_upstream_finalize_request(r, u,
|
|
742 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
743 return;
|
|
744 }
|
|
745 }
|
|
746
|
|
747
|
36
|
748 static void
|
|
749 ngx_http_upstream_send_request_handler(ngx_event_t *wev)
|
28
|
750 {
|
|
751 ngx_connection_t *c;
|
|
752 ngx_http_request_t *r;
|
|
753 ngx_http_upstream_t *u;
|
|
754
|
|
755 c = wev->data;
|
|
756 r = c->data;
|
|
757 u = r->upstream;
|
|
758
|
|
759 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
760 "http upstream send request handler");
|
|
761
|
|
762 if (wev->timedout) {
|
32
|
763 c->log->action = "sending request to upstream";
|
28
|
764 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
765 return;
|
|
766 }
|
|
767
|
|
768 ngx_http_upstream_send_request(r, u);
|
|
769 }
|
|
770
|
|
771
|
36
|
772 static void
|
|
773 ngx_http_upstream_process_header(ngx_event_t *rev)
|
28
|
774 {
|
64
|
775 ssize_t n;
|
|
776 ngx_int_t rc;
|
122
|
777 ngx_str_t *uri, args;
|
|
778 ngx_uint_t i, key, flags;
|
64
|
779 ngx_list_part_t *part;
|
|
780 ngx_table_elt_t *h;
|
|
781 ngx_connection_t *c;
|
|
782 ngx_http_request_t *r;
|
|
783 ngx_http_upstream_t *u;
|
|
784 ngx_http_err_page_t *err_page;
|
|
785 ngx_http_core_loc_conf_t *clcf;
|
|
786 ngx_http_upstream_header_t *hh;
|
|
787 ngx_http_upstream_main_conf_t *umcf;
|
28
|
788
|
|
789 c = rev->data;
|
|
790 r = c->data;
|
|
791 u = r->upstream;
|
|
792
|
|
793 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
|
32
|
794 "http upstream process header");
|
28
|
795
|
32
|
796 c->log->action = "reading response header from upstream";
|
28
|
797
|
|
798 if (rev->timedout) {
|
|
799 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
800 return;
|
|
801 }
|
|
802
|
|
803 if (u->header_in.start == NULL) {
|
|
804 u->header_in.start = ngx_palloc(r->pool, u->conf->header_buffer_size);
|
|
805 if (u->header_in.start == NULL) {
|
|
806 ngx_http_upstream_finalize_request(r, u,
|
|
807 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
808 return;
|
|
809 }
|
|
810
|
|
811 u->header_in.pos = u->header_in.start;
|
|
812 u->header_in.last = u->header_in.start;
|
32
|
813 u->header_in.end = u->header_in.start + u->conf->header_buffer_size;
|
28
|
814 u->header_in.temporary = 1;
|
|
815
|
|
816 u->header_in.tag = u->output.tag;
|
|
817
|
58
|
818 if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8,
|
|
819 sizeof(ngx_table_elt_t)) == NGX_ERROR)
|
|
820 {
|
|
821 ngx_http_upstream_finalize_request(r, u,
|
|
822 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
823 return;
|
|
824 }
|
|
825
|
28
|
826 #if 0
|
|
827 if (u->cache) {
|
|
828 u->header_in.pos += u->cache->ctx.header_size;
|
|
829 u->header_in.last = u->header_in.pos;
|
|
830 }
|
|
831 #endif
|
|
832 }
|
|
833
|
|
834 n = ngx_recv(u->peer.connection, u->header_in.last,
|
|
835 u->header_in.end - u->header_in.last);
|
|
836
|
|
837 if (n == NGX_AGAIN) {
|
|
838 #if 0
|
|
839 ngx_add_timer(rev, u->read_timeout);
|
|
840 #endif
|
|
841
|
|
842 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
843 ngx_http_upstream_finalize_request(r, u,
|
|
844 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
845 return;
|
|
846 }
|
|
847
|
|
848 return;
|
|
849 }
|
|
850
|
|
851 if (n == 0) {
|
|
852 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
853 "upstream prematurely closed connection");
|
|
854 }
|
|
855
|
|
856 if (n == NGX_ERROR || n == 0) {
|
|
857 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
858 return;
|
|
859 }
|
|
860
|
|
861 u->header_in.last += n;
|
|
862
|
|
863 #if 0
|
|
864 u->valid_header_in = 0;
|
|
865
|
|
866 u->peer.cached = 0;
|
|
867 #endif
|
|
868
|
|
869 rc = u->process_header(r);
|
|
870
|
|
871 if (rc == NGX_AGAIN) {
|
|
872 #if 0
|
|
873 ngx_add_timer(rev, u->read_timeout);
|
|
874 #endif
|
|
875
|
58
|
876 if (u->header_in.pos == u->header_in.end) {
|
28
|
877 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
878 "upstream sent too big header");
|
|
879
|
|
880 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
881 return;
|
|
882 }
|
|
883
|
|
884 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
885 ngx_http_upstream_finalize_request(r, u,
|
|
886 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
887 return;
|
|
888 }
|
|
889
|
|
890 return;
|
|
891 }
|
|
892
|
|
893 if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) {
|
|
894 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
895 return;
|
|
896 }
|
|
897
|
|
898 if (rc == NGX_ERROR || rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
899 ngx_http_upstream_finalize_request(r, u,
|
|
900 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
901 return;
|
|
902 }
|
|
903
|
|
904 /* rc == NGX_OK */
|
|
905
|
78
|
906 if (u->headers_in.status_n == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
58
|
907
|
|
908 if (u->peer.tries > 1
|
|
909 && (u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_500))
|
|
910 {
|
|
911 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_500);
|
|
912 return;
|
|
913 }
|
|
914
|
|
915 #if (NGX_HTTP_CACHE)
|
|
916
|
|
917 if (u->peer.tries == 0
|
|
918 && u->stale
|
|
919 && (u->conf->use_stale & NGX_HTTP_UPSTREAM_FT_HTTP_500))
|
|
920 {
|
|
921 ngx_http_upstream_finalize_request(r, u,
|
78
|
922 ngx_http_send_cached_response(r));
|
58
|
923 return;
|
|
924 }
|
|
925
|
|
926 #endif
|
|
927 }
|
|
928
|
78
|
929 if (u->headers_in.status_n == NGX_HTTP_NOT_FOUND
|
58
|
930 && u->peer.tries > 1
|
|
931 && u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_404)
|
|
932 {
|
|
933 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_404);
|
|
934 return;
|
|
935 }
|
|
936
|
|
937
|
78
|
938 if (u->headers_in.status_n >= NGX_HTTP_BAD_REQUEST
|
36
|
939 && u->conf->redirect_errors
|
|
940 && r->err_ctx == NULL)
|
|
941 {
|
|
942 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
943
|
|
944 if (clcf->error_pages) {
|
|
945
|
|
946 err_page = clcf->error_pages->elts;
|
|
947 for (i = 0; i < clcf->error_pages->nelts; i++) {
|
78
|
948 if (err_page[i].status == (ngx_int_t) u->headers_in.status_n) {
|
|
949
|
|
950 if (u->headers_in.status_n == NGX_HTTP_UNAUTHORIZED) {
|
|
951
|
|
952 r->headers_out.www_authenticate =
|
|
953 ngx_list_push(&r->headers_out.headers);
|
|
954
|
|
955 if (r->headers_out.www_authenticate == NULL) {
|
|
956 ngx_http_upstream_finalize_request(r, u,
|
|
957 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
958 return;
|
|
959 }
|
|
960
|
|
961 *r->headers_out.www_authenticate =
|
|
962 *u->headers_in.www_authenticate;
|
|
963 }
|
|
964
|
36
|
965 ngx_http_upstream_finalize_request(r, u,
|
78
|
966 u->headers_in.status_n);
|
36
|
967 return;
|
|
968 }
|
|
969 }
|
|
970 }
|
|
971 }
|
|
972
|
64
|
973 if (r->upstream->headers_in.x_accel_redirect) {
|
|
974 ngx_http_upstream_finalize_request(r, u, NGX_DECLINED);
|
|
975
|
|
976 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
|
|
977 hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets;
|
|
978
|
|
979 part = &r->upstream->headers_in.headers.part;
|
|
980 h = part->elts;
|
|
981
|
|
982 for (i = 0; /* void */; i++) {
|
|
983
|
|
984 if (i >= part->nelts) {
|
|
985 if (part->next == NULL) {
|
|
986 break;
|
|
987 }
|
|
988
|
|
989 part = part->next;
|
|
990 h = part->elts;
|
|
991 i = 0;
|
|
992 }
|
|
993
|
|
994 key = h[i].hash % umcf->headers_in_hash.hash_size;
|
|
995
|
|
996 if (hh[key].redirect
|
|
997 && hh[key].name.len == h[i].key.len
|
|
998 && ngx_strcasecmp(hh[key].name.data, h[i].key.data) == 0)
|
|
999 {
|
|
1000 if (hh[key].copy_handler(r, &h[i], hh[key].conf) != NGX_OK) {
|
|
1001 ngx_http_upstream_finalize_request(r, u,
|
|
1002 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1003 return;
|
|
1004 }
|
|
1005
|
|
1006 }
|
|
1007 }
|
|
1008
|
122
|
1009 uri = &r->upstream->headers_in.x_accel_redirect->value;
|
|
1010 args.len = 0;
|
|
1011 args.data = NULL;
|
|
1012 flags = 0;
|
|
1013
|
|
1014 if (ngx_http_parse_unsafe_uri(r, uri, &args, &flags) != NGX_OK) {
|
|
1015 ngx_http_upstream_finalize_request(r, u, NGX_HTTP_NOT_FOUND);
|
|
1016 return;
|
|
1017 }
|
|
1018
|
|
1019 if (flags & NGX_HTTP_ZERO_IN_URI) {
|
|
1020 r->zero_in_uri = 1;
|
|
1021 }
|
|
1022
|
|
1023 ngx_http_internal_redirect(r, uri, &args);
|
64
|
1024 return;
|
|
1025 }
|
|
1026
|
28
|
1027 ngx_http_upstream_send_response(r, u);
|
|
1028 }
|
|
1029
|
|
1030
|
36
|
1031 static void
|
|
1032 ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
28
|
1033 {
|
58
|
1034 ngx_int_t rc;
|
|
1035 ngx_uint_t i, key;
|
|
1036 ngx_list_part_t *part;
|
|
1037 ngx_table_elt_t *h;
|
|
1038 ngx_event_pipe_t *p;
|
112
|
1039 ngx_pool_cleanup_t *cl;
|
|
1040 ngx_pool_cleanup_file_t *clf;
|
58
|
1041 ngx_http_core_loc_conf_t *clcf;
|
|
1042 ngx_http_upstream_header_t *hh;
|
|
1043 ngx_http_upstream_main_conf_t *umcf;
|
|
1044
|
|
1045 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
|
|
1046 hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets;
|
|
1047
|
|
1048 part = &r->upstream->headers_in.headers.part;
|
|
1049 h = part->elts;
|
|
1050
|
|
1051 for (i = 0; /* void */; i++) {
|
28
|
1052
|
58
|
1053 if (i >= part->nelts) {
|
|
1054 if (part->next == NULL) {
|
|
1055 break;
|
|
1056 }
|
|
1057
|
|
1058 part = part->next;
|
|
1059 h = part->elts;
|
|
1060 i = 0;
|
|
1061 }
|
|
1062
|
|
1063 key = h[i].hash % umcf->headers_in_hash.hash_size;
|
|
1064
|
|
1065 if (hh[key].name.len == h[i].key.len
|
|
1066 && ngx_strcasecmp(hh[key].name.data, h[i].key.data) == 0)
|
|
1067 {
|
|
1068 if (hh[key].copy_handler(r, &h[i], hh[key].conf) != NGX_OK) {
|
|
1069 ngx_http_upstream_finalize_request(r, u,
|
|
1070 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1071 return;
|
|
1072 }
|
|
1073
|
|
1074 continue;
|
|
1075 }
|
|
1076
|
|
1077 if (ngx_http_upstream_copy_header_line(r, &h[i], 0) != NGX_OK) {
|
|
1078 ngx_http_upstream_finalize_request(r, u,
|
|
1079 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
1080 return;
|
|
1081 }
|
|
1082 }
|
|
1083
|
78
|
1084 r->headers_out.status = u->headers_in.status_n;
|
|
1085 r->headers_out.status_line = u->headers_in.status_line;
|
|
1086
|
58
|
1087 rc = ngx_http_send_header(r);
|
28
|
1088
|
34
|
1089 if (rc == NGX_ERROR || rc > NGX_OK) {
|
|
1090 ngx_http_upstream_finalize_request(r, u, rc);
|
28
|
1091 return;
|
|
1092 }
|
|
1093
|
|
1094 u->header_sent = 1;
|
|
1095
|
122
|
1096 if (r->request_body && r->request_body->temp_file) {
|
112
|
1097 for (cl = r->pool->cleanup; cl; cl = cl->next) {
|
|
1098 if (cl->handler == ngx_pool_cleanup_file) {
|
|
1099 clf = cl->data;
|
|
1100
|
|
1101 if (clf->fd == r->request_body->temp_file->file.fd) {
|
|
1102 cl->handler(clf);
|
|
1103 cl->handler = NULL;
|
|
1104 break;
|
|
1105 }
|
|
1106 }
|
|
1107 }
|
|
1108 }
|
|
1109
|
28
|
1110 /* TODO: preallocate event_pipe bufs, look "Content-Length" */
|
|
1111
|
|
1112 #if 0
|
|
1113
|
|
1114 if (u->cache && u->cache->ctx.file.fd != NGX_INVALID_FILE) {
|
|
1115 if (ngx_close_file(u->cache->ctx.file.fd) == NGX_FILE_ERROR) {
|
|
1116 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
|
|
1117 ngx_close_file_n " \"%s\" failed",
|
|
1118 u->cache->ctx.file.name.data);
|
|
1119 }
|
|
1120 }
|
|
1121
|
|
1122 if (u->cachable) {
|
|
1123 header = (ngx_http_cache_header_t *) u->header_in->start;
|
|
1124
|
|
1125 header->expires = u->cache->ctx.expires;
|
|
1126 header->last_modified = u->cache->ctx.last_modified;
|
|
1127 header->date = u->cache->ctx.date;
|
|
1128 header->length = r->headers_out.content_length_n;
|
|
1129 u->cache->ctx.length = r->headers_out.content_length_n;
|
|
1130
|
|
1131 header->key_len = u->cache->ctx.key0.len;
|
|
1132 ngx_memcpy(&header->key, u->cache->ctx.key0.data, header->key_len);
|
|
1133 header->key[header->key_len] = LF;
|
|
1134 }
|
|
1135
|
|
1136 #endif
|
|
1137
|
|
1138 p = &u->pipe;
|
|
1139
|
|
1140 p->output_filter = (ngx_event_pipe_output_filter_pt) ngx_http_output_filter;
|
|
1141 p->output_ctx = r;
|
|
1142 p->tag = u->output.tag;
|
|
1143 p->bufs = u->conf->bufs;
|
|
1144 p->busy_size = u->conf->busy_buffers_size;
|
|
1145 p->upstream = u->peer.connection;
|
|
1146 p->downstream = r->connection;
|
|
1147 p->pool = r->pool;
|
|
1148 p->log = r->connection->log;
|
|
1149
|
|
1150 p->cachable = u->cachable;
|
|
1151
|
50
|
1152 p->temp_file = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
|
|
1153 if (p->temp_file == NULL) {
|
28
|
1154 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1155 return;
|
|
1156 }
|
|
1157
|
|
1158 p->temp_file->file.fd = NGX_INVALID_FILE;
|
|
1159 p->temp_file->file.log = r->connection->log;
|
|
1160 p->temp_file->path = u->conf->temp_path;
|
|
1161 p->temp_file->pool = r->pool;
|
|
1162
|
|
1163 if (u->cachable) {
|
|
1164 p->temp_file->persistent = 1;
|
|
1165 } else {
|
|
1166 p->temp_file->warn = "an upstream response is buffered "
|
|
1167 "to a temporary file";
|
|
1168 }
|
|
1169
|
|
1170 p->max_temp_file_size = u->conf->max_temp_file_size;
|
|
1171 p->temp_file_write_size = u->conf->temp_file_write_size;
|
|
1172
|
50
|
1173 p->preread_bufs = ngx_alloc_chain_link(r->pool);
|
|
1174 if (p->preread_bufs == NULL) {
|
28
|
1175 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1176 return;
|
|
1177 }
|
|
1178 p->preread_bufs->buf = &u->header_in;
|
|
1179 p->preread_bufs->next = NULL;
|
|
1180 u->header_in.recycled = 1;
|
|
1181
|
|
1182 p->preread_size = u->header_in.last - u->header_in.pos;
|
|
1183
|
|
1184 if (u->cachable) {
|
|
1185 p->buf_to_file = ngx_calloc_buf(r->pool);
|
|
1186 if (p->buf_to_file == NULL) {
|
|
1187 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1188 return;
|
|
1189 }
|
|
1190 p->buf_to_file->pos = u->header_in.start;
|
|
1191 p->buf_to_file->last = u->header_in.pos;
|
|
1192 p->buf_to_file->temporary = 1;
|
|
1193 }
|
|
1194
|
|
1195 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
|
|
1196 /* the posted aio operation may currupt a shadow buffer */
|
|
1197 p->single_buf = 1;
|
|
1198 }
|
|
1199
|
|
1200 /* TODO: p->free_bufs = 0 if use ngx_create_chain_of_bufs() */
|
|
1201 p->free_bufs = 1;
|
|
1202
|
|
1203 /*
|
|
1204 * event_pipe would do u->header_in.last += p->preread_size
|
|
1205 * as though these bytes were read
|
|
1206 */
|
|
1207 u->header_in.last = u->header_in.pos;
|
|
1208
|
|
1209 if (u->conf->cyclic_temp_file) {
|
|
1210
|
|
1211 /*
|
|
1212 * we need to disable the use of sendfile() if we use cyclic temp file
|
|
1213 * because the writing a new data may interfere with sendfile()
|
|
1214 * that uses the same kernel file pages (at least on FreeBSD)
|
|
1215 */
|
|
1216
|
|
1217 p->cyclic_temp_file = 1;
|
|
1218 r->connection->sendfile = 0;
|
|
1219
|
|
1220 } else {
|
|
1221 p->cyclic_temp_file = 0;
|
|
1222 }
|
|
1223
|
|
1224 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
1225
|
|
1226 p->read_timeout = u->conf->read_timeout;
|
|
1227 p->send_timeout = clcf->send_timeout;
|
|
1228 p->send_lowat = clcf->send_lowat;
|
|
1229
|
58
|
1230 u->peer.connection->read->handler = ngx_http_upstream_process_body;
|
|
1231 r->write_event_handler = ngx_http_upstream_process_downstream;
|
28
|
1232
|
|
1233 ngx_http_upstream_process_body(u->peer.connection->read);
|
|
1234 }
|
|
1235
|
|
1236
|
36
|
1237 static void
|
58
|
1238 ngx_http_upstream_process_downstream(ngx_http_request_t *r)
|
|
1239 {
|
|
1240 ngx_http_upstream_process_body(r->connection->write);
|
|
1241 }
|
|
1242
|
|
1243
|
|
1244 static void
|
36
|
1245 ngx_http_upstream_process_body(ngx_event_t *ev)
|
28
|
1246 {
|
58
|
1247 ngx_event_pipe_t *p;
|
28
|
1248 ngx_connection_t *c;
|
|
1249 ngx_http_request_t *r;
|
|
1250 ngx_http_upstream_t *u;
|
|
1251
|
|
1252 c = ev->data;
|
|
1253 r = c->data;
|
|
1254 u = r->upstream;
|
|
1255
|
|
1256 if (ev->write) {
|
32
|
1257 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1258 "http upstream process downstream");
|
|
1259 c->log->action = "sending to client";
|
28
|
1260
|
|
1261 } else {
|
32
|
1262 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1263 "http upstream process upstream");
|
|
1264 c->log->action = "reading upstream";
|
28
|
1265 }
|
|
1266
|
|
1267 p = &u->pipe;
|
|
1268
|
|
1269 if (ev->timedout) {
|
|
1270 if (ev->write) {
|
76
|
1271 if (ev->delayed) {
|
|
1272
|
|
1273 ev->timedout = 0;
|
|
1274 ev->delayed = 0;
|
|
1275
|
|
1276 if (!ev->ready) {
|
|
1277 ngx_add_timer(ev, p->send_timeout);
|
|
1278
|
|
1279 if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR)
|
|
1280 {
|
|
1281 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1282 return;
|
|
1283 }
|
|
1284
|
|
1285 return;
|
|
1286 }
|
|
1287
|
|
1288 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
|
1289 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1290 return;
|
|
1291 }
|
|
1292
|
|
1293 } else {
|
|
1294 p->downstream_error = 1;
|
|
1295 ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT,
|
|
1296 "client timed out");
|
|
1297 }
|
28
|
1298
|
|
1299 } else {
|
|
1300 p->upstream_error = 1;
|
|
1301 ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT,
|
|
1302 "upstream timed out");
|
|
1303 }
|
|
1304
|
|
1305 } else {
|
76
|
1306 if (ev->write && ev->delayed) {
|
|
1307 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1308 "http downstream delayed");
|
|
1309
|
|
1310 if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR) {
|
|
1311 return;
|
|
1312 }
|
|
1313
|
|
1314 return;
|
|
1315 }
|
|
1316
|
28
|
1317 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
|
1318 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1319 return;
|
|
1320 }
|
|
1321 }
|
|
1322
|
|
1323 if (u->peer.connection) {
|
|
1324
|
|
1325 #if (NGX_HTTP_FILE_CACHE)
|
|
1326
|
|
1327 if (p->upstream_done && u->cachable) {
|
|
1328 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
1329 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
1330 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1331 return;
|
|
1332 }
|
|
1333
|
|
1334 } else if (p->upstream_eof && u->cachable) {
|
|
1335
|
|
1336 /* TODO: check length & update cache */
|
|
1337
|
|
1338 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
1339 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
1340 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1341 return;
|
|
1342 }
|
|
1343 }
|
|
1344
|
|
1345 #endif
|
|
1346
|
|
1347 if (p->upstream_done || p->upstream_eof || p->upstream_error) {
|
32
|
1348 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1349 "http upstream exit: %p", p->out);
|
28
|
1350 #if 0
|
|
1351 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
1352 #endif
|
|
1353 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1354 return;
|
|
1355 }
|
|
1356 }
|
|
1357
|
|
1358 if (p->downstream_error) {
|
32
|
1359 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
1360 "http upstream downstream error");
|
28
|
1361
|
|
1362 if (!u->cachable && u->peer.connection) {
|
|
1363 ngx_http_upstream_finalize_request(r, u, 0);
|
|
1364 }
|
|
1365 }
|
|
1366 }
|
|
1367
|
|
1368
|
36
|
1369 static void
|
|
1370 ngx_http_upstream_dummy_handler(ngx_event_t *wev)
|
28
|
1371 {
|
|
1372 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
1373 "http upstream dummy handler");
|
|
1374 }
|
|
1375
|
|
1376
|
36
|
1377 static void
|
|
1378 ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
|
|
1379 ngx_uint_t ft_type)
|
28
|
1380 {
|
74
|
1381 ngx_uint_t status, down;
|
28
|
1382
|
|
1383 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1384 "http next upstream, %xD", ft_type);
|
|
1385
|
|
1386 #if 0
|
|
1387 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
1388 #endif
|
|
1389
|
74
|
1390 if (ft_type == NGX_HTTP_UPSTREAM_FT_HTTP_404) {
|
|
1391 down = 0;
|
|
1392 } else {
|
|
1393 down = 1;
|
28
|
1394 }
|
74
|
1395
|
|
1396 ngx_event_connect_peer_failed(&u->peer, down);
|
|
1397
|
28
|
1398 if (ft_type == NGX_HTTP_UPSTREAM_FT_TIMEOUT) {
|
|
1399 ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_ETIMEDOUT,
|
|
1400 "upstream timed out");
|
|
1401 }
|
|
1402
|
|
1403 if (u->peer.cached && ft_type == NGX_HTTP_UPSTREAM_FT_ERROR) {
|
|
1404 status = 0;
|
|
1405
|
|
1406 } else {
|
|
1407 switch(ft_type) {
|
|
1408
|
|
1409 case NGX_HTTP_UPSTREAM_FT_TIMEOUT:
|
|
1410 status = NGX_HTTP_GATEWAY_TIME_OUT;
|
|
1411 break;
|
|
1412
|
|
1413 case NGX_HTTP_UPSTREAM_FT_HTTP_500:
|
|
1414 status = NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
1415 break;
|
|
1416
|
|
1417 case NGX_HTTP_UPSTREAM_FT_HTTP_404:
|
|
1418 status = NGX_HTTP_NOT_FOUND;
|
|
1419 break;
|
|
1420
|
|
1421 /*
|
|
1422 * NGX_HTTP_UPSTREAM_FT_BUSY_LOCK and NGX_HTTP_UPSTREAM_FT_MAX_WAITING
|
|
1423 * never reach here
|
|
1424 */
|
|
1425
|
|
1426 default:
|
|
1427 status = NGX_HTTP_BAD_GATEWAY;
|
|
1428 }
|
|
1429 }
|
|
1430
|
118
|
1431 if (r->connection->closed) {
|
28
|
1432 ngx_http_upstream_finalize_request(r, u,
|
|
1433 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
1434 return;
|
|
1435 }
|
|
1436
|
|
1437 if (status) {
|
|
1438 u->state->status = status;
|
|
1439
|
74
|
1440 if (u->peer.tries == 0 || !(u->conf->next_upstream & ft_type)) {
|
28
|
1441
|
|
1442 #if (NGX_HTTP_CACHE)
|
|
1443
|
|
1444 if (u->stale && (u->conf->use_stale & ft_type)) {
|
|
1445 ngx_http_upstream_finalize_request(r, u,
|
74
|
1446 ngx_http_send_cached_response(r));
|
28
|
1447 return;
|
|
1448 }
|
|
1449
|
|
1450 #endif
|
|
1451
|
|
1452 ngx_http_upstream_finalize_request(r, u, status);
|
|
1453 return;
|
|
1454 }
|
|
1455 }
|
|
1456
|
|
1457 if (u->peer.connection) {
|
|
1458 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1459 "close http upstream connection: %d",
|
|
1460 u->peer.connection->fd);
|
|
1461
|
|
1462 ngx_close_connection(u->peer.connection);
|
|
1463 }
|
|
1464
|
|
1465 #if 0
|
|
1466 if (u->conf->busy_lock && !u->busy_locked) {
|
|
1467 ngx_http_upstream_busy_lock(p);
|
|
1468 return;
|
|
1469 }
|
|
1470 #endif
|
|
1471
|
|
1472 ngx_http_upstream_connect(r, u);
|
|
1473 }
|
|
1474
|
|
1475
|
36
|
1476 static void
|
118
|
1477 ngx_http_upstream_cleanup(void *data)
|
|
1478 {
|
|
1479 ngx_http_request_t *r = data;
|
|
1480
|
|
1481 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1482 "cleanup http upstream request: \"%V\"", &r->uri);
|
|
1483
|
|
1484 ngx_http_upstream_finalize_request(r, r->upstream, NGX_DONE);
|
|
1485 }
|
|
1486
|
|
1487
|
|
1488 static void
|
36
|
1489 ngx_http_upstream_finalize_request(ngx_http_request_t *r,
|
|
1490 ngx_http_upstream_t *u, ngx_int_t rc)
|
28
|
1491 {
|
112
|
1492 ngx_time_t *tp;
|
|
1493
|
32
|
1494 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1495 "finalize http upstream request: %i", rc);
|
28
|
1496
|
118
|
1497 *u->cleanup = NULL;
|
|
1498
|
112
|
1499 if (u->state->response_time) {
|
|
1500 tp = ngx_timeofday();
|
|
1501 u->state->response_time = tp->sec * 1000 + tp->msec
|
|
1502 - u->state->response_time;
|
|
1503 }
|
|
1504
|
28
|
1505 u->finalize_request(r, rc);
|
|
1506
|
|
1507 if (u->peer.connection) {
|
|
1508 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1509 "close http upstream connection: %d",
|
|
1510 u->peer.connection->fd);
|
|
1511
|
|
1512 ngx_close_connection(u->peer.connection);
|
|
1513 }
|
|
1514
|
32
|
1515 u->peer.connection = NULL;
|
|
1516
|
112
|
1517 if (u->header_sent && (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE))
|
28
|
1518 {
|
|
1519 rc = 0;
|
|
1520 }
|
|
1521
|
30
|
1522 if (u->pipe.temp_file) {
|
28
|
1523 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1524 "http upstream temp fd: %d",
|
|
1525 u->pipe.temp_file->file.fd);
|
|
1526 }
|
|
1527
|
|
1528 #if 0
|
|
1529 if (u->cache) {
|
|
1530 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
32
|
1531 "http upstream cache fd: %d",
|
28
|
1532 u->cache->ctx.file.fd);
|
|
1533 }
|
|
1534 #endif
|
|
1535
|
58
|
1536 r->log_handler = u->saved_log_handler;
|
64
|
1537
|
|
1538 if (rc == NGX_DECLINED) {
|
|
1539 return;
|
|
1540 }
|
|
1541
|
32
|
1542 r->connection->log->action = "sending to client";
|
|
1543
|
102
|
1544 if (rc == 0 && r->main == r) {
|
28
|
1545 rc = ngx_http_send_last(r);
|
|
1546 }
|
|
1547
|
|
1548 ngx_http_finalize_request(r, rc);
|
|
1549 }
|
|
1550
|
|
1551
|
58
|
1552 static ngx_int_t
|
|
1553 ngx_http_upstream_process_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
1554 ngx_uint_t offset)
|
|
1555 {
|
|
1556 ngx_table_elt_t **ph;
|
|
1557
|
|
1558 ph = (ngx_table_elt_t **) ((char *) &r->upstream->headers_in + offset);
|
|
1559
|
|
1560 if (*ph == NULL) {
|
|
1561 *ph = h;
|
|
1562 }
|
|
1563
|
|
1564 return NGX_OK;
|
|
1565 }
|
|
1566
|
|
1567
|
|
1568 static ngx_int_t
|
|
1569 ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
|
|
1570 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
1571 {
|
|
1572 ngx_array_t *pa;
|
|
1573 ngx_table_elt_t **ph;
|
|
1574
|
|
1575 pa = (ngx_array_t *) ((char *) &r->upstream->headers_in + offset);
|
|
1576
|
|
1577 if (pa->elts == NULL) {
|
|
1578 if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
|
|
1579 {
|
|
1580 return NGX_ERROR;
|
|
1581 }
|
|
1582 }
|
|
1583
|
|
1584 ph = ngx_array_push(pa);
|
|
1585 if (ph == NULL) {
|
|
1586 return NGX_ERROR;
|
|
1587 }
|
|
1588
|
|
1589 *ph = h;
|
|
1590
|
|
1591 return NGX_OK;
|
|
1592 }
|
|
1593
|
|
1594
|
|
1595 static ngx_int_t
|
|
1596 ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
1597 ngx_uint_t offset)
|
|
1598 {
|
|
1599 return NGX_OK;
|
|
1600 }
|
|
1601
|
|
1602
|
|
1603 static ngx_int_t
|
76
|
1604 ngx_http_upstream_process_limit_rate(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
1605 ngx_uint_t offset)
|
|
1606 {
|
|
1607 ngx_int_t n;
|
|
1608
|
|
1609 r->upstream->headers_in.x_accel_limit_rate = h;
|
|
1610
|
|
1611 n = ngx_atoi(h->value.data, h->value.len);
|
|
1612
|
|
1613 if (n != NGX_ERROR) {
|
|
1614 r->limit_rate = (size_t) n;
|
|
1615 }
|
|
1616
|
|
1617 return NGX_OK;
|
|
1618 }
|
|
1619
|
|
1620
|
|
1621 static ngx_int_t
|
58
|
1622 ngx_http_upstream_copy_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
1623 ngx_uint_t offset)
|
|
1624 {
|
122
|
1625 ngx_table_elt_t *ho, **ph;
|
58
|
1626
|
|
1627 ho = ngx_list_push(&r->headers_out.headers);
|
|
1628 if (ho == NULL) {
|
|
1629 return NGX_ERROR;
|
|
1630 }
|
|
1631
|
|
1632 *ho = *h;
|
|
1633
|
122
|
1634 if (offset) {
|
|
1635 ph = (ngx_table_elt_t **) ((char *) &r->headers_out + offset);
|
|
1636 *ph = ho;
|
|
1637 }
|
|
1638
|
58
|
1639 return NGX_OK;
|
|
1640 }
|
|
1641
|
|
1642
|
|
1643 static ngx_int_t
|
|
1644 ngx_http_upstream_conditional_copy_header_line(ngx_http_request_t *r,
|
|
1645 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
1646 {
|
|
1647 ngx_flag_t *f;
|
|
1648 ngx_table_elt_t *ho;
|
|
1649
|
|
1650 f = (ngx_flag_t *) ((char *) r->upstream->conf + offset);
|
|
1651
|
|
1652 if (*f == 0) {
|
|
1653 return NGX_OK;
|
|
1654 }
|
|
1655
|
|
1656 ho = ngx_list_push(&r->headers_out.headers);
|
|
1657 if (ho == NULL) {
|
|
1658 return NGX_ERROR;
|
|
1659 }
|
|
1660
|
|
1661 *ho = *h;
|
|
1662
|
|
1663 return NGX_OK;
|
|
1664 }
|
|
1665
|
|
1666
|
|
1667 static ngx_int_t
|
|
1668 ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r,
|
|
1669 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
1670 {
|
|
1671 ngx_array_t *pa;
|
|
1672 ngx_table_elt_t *ho, **ph;
|
|
1673
|
|
1674 pa = (ngx_array_t *) ((char *) &r->headers_out + offset);
|
|
1675
|
|
1676 if (pa->elts == NULL) {
|
|
1677 if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
|
|
1678 {
|
|
1679 return NGX_ERROR;
|
|
1680 }
|
|
1681 }
|
|
1682
|
|
1683 ph = ngx_array_push(pa);
|
|
1684 if (ph == NULL) {
|
|
1685 return NGX_ERROR;
|
|
1686 }
|
|
1687
|
|
1688 ho = ngx_list_push(&r->headers_out.headers);
|
|
1689 if (ho == NULL) {
|
|
1690 return NGX_ERROR;
|
|
1691 }
|
|
1692
|
|
1693 *ho = *h;
|
|
1694 *ph = ho;
|
|
1695
|
|
1696 return NGX_OK;
|
|
1697 }
|
|
1698
|
|
1699
|
|
1700 static ngx_int_t
|
|
1701 ngx_http_upstream_copy_content_type(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
1702 ngx_uint_t offset)
|
|
1703 {
|
|
1704 r->headers_out.content_type = h->value;
|
|
1705
|
|
1706 return NGX_OK;
|
|
1707 }
|
|
1708
|
|
1709
|
|
1710 static ngx_int_t
|
|
1711 ngx_http_upstream_copy_content_length(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
1712 ngx_uint_t offset)
|
|
1713 {
|
|
1714 ngx_table_elt_t *ho;
|
|
1715
|
|
1716 ho = ngx_list_push(&r->headers_out.headers);
|
|
1717 if (ho == NULL) {
|
|
1718 return NGX_ERROR;
|
|
1719 }
|
|
1720
|
|
1721 *ho = *h;
|
|
1722
|
|
1723 r->headers_out.content_length = ho;
|
|
1724 r->headers_out.content_length_n = ngx_atoof(h->value.data, h->value.len);
|
|
1725
|
|
1726 return NGX_OK;
|
|
1727 }
|
|
1728
|
|
1729
|
|
1730 static ngx_int_t
|
|
1731 ngx_http_upstream_rewrite_location(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
1732 ngx_uint_t offset)
|
|
1733 {
|
|
1734 ngx_int_t rc;
|
|
1735 ngx_table_elt_t *ho;
|
|
1736
|
|
1737 ho = ngx_list_push(&r->headers_out.headers);
|
|
1738 if (ho == NULL) {
|
|
1739 return NGX_ERROR;
|
|
1740 }
|
|
1741
|
|
1742 *ho = *h;
|
|
1743
|
|
1744 if (r->upstream->rewrite_redirect) {
|
|
1745 rc = r->upstream->rewrite_redirect(r, ho, 0);
|
|
1746
|
78
|
1747 if (rc == NGX_DECLINED) {
|
|
1748 return NGX_OK;
|
|
1749 }
|
|
1750
|
58
|
1751 if (rc == NGX_OK) {
|
|
1752 r->headers_out.location = ho;
|
|
1753
|
|
1754 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1755 "rewritten location: \"%V\"", &ho->value);
|
|
1756 }
|
|
1757
|
|
1758 return rc;
|
|
1759 }
|
|
1760
|
|
1761 /*
|
|
1762 * we do not set r->headers_out.location here to avoid the handling
|
|
1763 * the local redirects without a host name by ngx_http_header_filter()
|
|
1764 */
|
|
1765
|
|
1766 return NGX_OK;
|
|
1767 }
|
|
1768
|
|
1769
|
|
1770 static ngx_int_t
|
|
1771 ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
1772 ngx_uint_t offset)
|
|
1773 {
|
|
1774 u_char *p;
|
|
1775 ngx_int_t rc;
|
|
1776 ngx_table_elt_t *ho;
|
|
1777
|
|
1778 ho = ngx_list_push(&r->headers_out.headers);
|
|
1779 if (ho == NULL) {
|
|
1780 return NGX_ERROR;
|
|
1781 }
|
|
1782
|
|
1783 *ho = *h;
|
|
1784
|
|
1785 if (r->upstream->rewrite_redirect) {
|
|
1786
|
|
1787 p = (u_char *) ngx_strstr(ho->value.data, "url=");
|
|
1788
|
|
1789 if (p) {
|
|
1790 rc = r->upstream->rewrite_redirect(r, ho, p + 4 - ho->value.data);
|
|
1791
|
|
1792 } else {
|
|
1793 return NGX_OK;
|
|
1794 }
|
|
1795
|
78
|
1796 if (rc == NGX_DECLINED) {
|
|
1797 return NGX_OK;
|
|
1798 }
|
|
1799
|
58
|
1800 #if (NGX_DEBUG)
|
|
1801 if (rc == NGX_OK) {
|
|
1802 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
1803 "rewritten refresh: \"%V\"", &ho->value);
|
|
1804 }
|
|
1805 #endif
|
|
1806
|
|
1807 return rc;
|
|
1808 }
|
|
1809
|
|
1810 return NGX_OK;
|
|
1811 }
|
|
1812
|
|
1813
|
|
1814 #if (NGX_HTTP_GZIP)
|
|
1815
|
|
1816 static ngx_int_t
|
|
1817 ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r,
|
|
1818 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
1819 {
|
|
1820 ngx_table_elt_t *ho;
|
|
1821
|
|
1822 ho = ngx_list_push(&r->headers_out.headers);
|
|
1823 if (ho == NULL) {
|
|
1824 return NGX_ERROR;
|
|
1825 }
|
|
1826
|
|
1827 *ho = *h;
|
|
1828
|
|
1829 r->headers_out.content_encoding = ho;
|
|
1830
|
|
1831 return NGX_OK;
|
|
1832 }
|
|
1833
|
|
1834 #endif
|
|
1835
|
|
1836
|
36
|
1837 static size_t
|
|
1838 ngx_http_upstream_log_status_getlen(ngx_http_request_t *r, uintptr_t data)
|
28
|
1839 {
|
|
1840 if (r->upstream) {
|
|
1841 return r->upstream->states.nelts * (3 + 2);
|
|
1842 }
|
|
1843
|
|
1844 return 1;
|
|
1845 }
|
|
1846
|
|
1847
|
36
|
1848 static u_char *
|
|
1849 ngx_http_upstream_log_status(ngx_http_request_t *r, u_char *buf,
|
|
1850 ngx_http_log_op_t *op)
|
28
|
1851 {
|
|
1852 ngx_uint_t i;
|
|
1853 ngx_http_upstream_t *u;
|
|
1854 ngx_http_upstream_state_t *state;
|
|
1855
|
|
1856 u = r->upstream;
|
|
1857
|
122
|
1858 if (u == NULL || u->states.nelts == 0) {
|
28
|
1859 *buf = '-';
|
|
1860 return buf + 1;
|
|
1861 }
|
|
1862
|
|
1863 i = 0;
|
|
1864 state = u->states.elts;
|
|
1865
|
|
1866 for ( ;; ) {
|
|
1867 if (state[i].status == 0) {
|
|
1868 *buf++ = '-';
|
|
1869
|
|
1870 } else {
|
|
1871 buf = ngx_sprintf(buf, "%ui", state[i].status);
|
|
1872 }
|
|
1873
|
|
1874 if (++i == u->states.nelts) {
|
|
1875 return buf;
|
|
1876 }
|
|
1877
|
|
1878 *buf++ = ',';
|
|
1879 *buf++ = ' ';
|
|
1880 }
|
|
1881 }
|
|
1882
|
|
1883
|
122
|
1884 static size_t
|
|
1885 ngx_http_upstream_log_response_time_getlen(ngx_http_request_t *r,
|
|
1886 uintptr_t data)
|
|
1887 {
|
|
1888 if (r->upstream) {
|
|
1889 return r->upstream->states.nelts * (NGX_TIME_T_LEN + 4 + 2);
|
|
1890 }
|
|
1891
|
|
1892 return 1;
|
|
1893 }
|
|
1894
|
|
1895
|
58
|
1896 static u_char *
|
112
|
1897 ngx_http_upstream_log_response_time(ngx_http_request_t *r, u_char *buf,
|
|
1898 ngx_http_log_op_t *op)
|
|
1899 {
|
|
1900 ngx_uint_t i;
|
|
1901 ngx_http_upstream_t *u;
|
|
1902 ngx_http_upstream_state_t *state;
|
|
1903
|
|
1904 u = r->upstream;
|
|
1905
|
122
|
1906 if (u == NULL || u->states.nelts == 0) {
|
112
|
1907 *buf = '-';
|
|
1908 return buf + 1;
|
|
1909 }
|
|
1910
|
|
1911 i = 0;
|
|
1912 state = u->states.elts;
|
|
1913
|
|
1914 for ( ;; ) {
|
|
1915 if (state[i].status == 0) {
|
|
1916 *buf++ = '-';
|
|
1917
|
|
1918 } else {
|
|
1919 buf = ngx_sprintf(buf, "%d.%03d",
|
|
1920 state[i].response_time / 1000,
|
|
1921 state[i].response_time % 1000);
|
|
1922 }
|
|
1923
|
|
1924 if (++i == u->states.nelts) {
|
|
1925 return buf;
|
|
1926 }
|
|
1927
|
|
1928 *buf++ = ',';
|
|
1929 *buf++ = ' ';
|
|
1930 }
|
|
1931 }
|
|
1932
|
|
1933
|
|
1934 static u_char *
|
58
|
1935 ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf, size_t len)
|
28
|
1936 {
|
|
1937 u_char *p;
|
|
1938 ngx_http_upstream_t *u;
|
|
1939 ngx_peer_connection_t *peer;
|
|
1940
|
|
1941 u = r->upstream;
|
|
1942 peer = &u->peer;
|
|
1943
|
|
1944 p = ngx_snprintf(buf, len,
|
58
|
1945 ", server: %V, URL: \"%V\","
|
118
|
1946 " upstream: \"%V%V%s%V\"",
|
52
|
1947 &r->server_name,
|
28
|
1948 &r->unparsed_uri,
|
58
|
1949 &u->conf->schema,
|
28
|
1950 &peer->peers->peer[peer->cur_peer].name,
|
|
1951 peer->peers->peer[peer->cur_peer].uri_separator,
|
104
|
1952 &u->uri);
|
28
|
1953 len -= p - buf;
|
|
1954 buf = p;
|
|
1955
|
54
|
1956 return ngx_http_log_error_info(r, buf, len);
|
28
|
1957 }
|
|
1958
|
|
1959
|
36
|
1960 static ngx_int_t
|
122
|
1961 ngx_http_upstream_add_variables(ngx_conf_t *cf)
|
28
|
1962 {
|
122
|
1963 ngx_http_variable_t *var, *v;
|
28
|
1964 ngx_http_log_op_name_t *op;
|
|
1965
|
122
|
1966 for (v = ngx_http_upstream_vars; v->name.len; v++) {
|
|
1967 var = ngx_http_add_variable(cf, &v->name, v->flags);
|
|
1968 if (var == NULL) {
|
|
1969 return NGX_ERROR;
|
|
1970 }
|
|
1971
|
|
1972 var->handler = v->handler;
|
|
1973 var->data = v->data;
|
|
1974 }
|
|
1975
|
28
|
1976 for (op = ngx_http_upstream_log_fmt_ops; op->name.len; op++) { /* void */ }
|
|
1977 op->run = NULL;
|
|
1978
|
|
1979 for (op = ngx_http_log_fmt_ops; op->run; op++) {
|
|
1980 if (op->name.len == 0) {
|
|
1981 op = (ngx_http_log_op_name_t *) op->run;
|
|
1982 }
|
|
1983 }
|
|
1984
|
|
1985 op->run = (ngx_http_log_op_run_pt) ngx_http_upstream_log_fmt_ops;
|
|
1986
|
|
1987 return NGX_OK;
|
|
1988 }
|
58
|
1989
|
|
1990
|
122
|
1991 static ngx_int_t
|
|
1992 ngx_http_upstream_status_variable(ngx_http_request_t *r,
|
|
1993 ngx_http_variable_value_t *v, uintptr_t data)
|
|
1994 {
|
|
1995 u_char *p;
|
|
1996 size_t len;
|
|
1997 ngx_uint_t i;
|
|
1998 ngx_http_upstream_t *u;
|
|
1999 ngx_http_upstream_state_t *state;
|
|
2000
|
|
2001 v->valid = 1;
|
|
2002 v->no_cachable = 0;
|
|
2003 v->not_found = 0;
|
|
2004
|
|
2005 u = r->upstream;
|
|
2006
|
|
2007 if (u == NULL || u->states.nelts == 0) {
|
|
2008 v->not_found = 1;
|
|
2009 return NGX_OK;
|
|
2010 }
|
|
2011
|
|
2012 len = u->states.nelts * (3 + 2);
|
|
2013
|
|
2014 p = ngx_palloc(r->pool, len);
|
|
2015 if (p == NULL) {
|
|
2016 return NGX_ERROR;
|
|
2017 }
|
|
2018
|
|
2019 v->data = p;
|
|
2020
|
|
2021 i = 0;
|
|
2022 state = u->states.elts;
|
|
2023
|
|
2024 for ( ;; ) {
|
|
2025 if (state[i].status == 0) {
|
|
2026 *p++ = '-';
|
|
2027
|
|
2028 } else {
|
|
2029 p = ngx_sprintf(p, "%ui", state[i].status);
|
|
2030 }
|
|
2031
|
|
2032 if (++i == u->states.nelts) {
|
|
2033 break;
|
|
2034 }
|
|
2035
|
|
2036 *p++ = ',';
|
|
2037 *p++ = ' ';
|
|
2038 }
|
|
2039
|
|
2040 v->len = p - v->data;
|
|
2041
|
|
2042 return NGX_OK;
|
|
2043 }
|
|
2044
|
|
2045
|
|
2046 static ngx_int_t
|
|
2047 ngx_http_upstream_response_time_variable(ngx_http_request_t *r,
|
|
2048 ngx_http_variable_value_t *v, uintptr_t data)
|
|
2049 {
|
|
2050 u_char *p;
|
|
2051 size_t len;
|
|
2052 ngx_uint_t i;
|
|
2053 ngx_http_upstream_t *u;
|
|
2054 ngx_http_upstream_state_t *state;
|
|
2055
|
|
2056 v->valid = 1;
|
|
2057 v->no_cachable = 0;
|
|
2058 v->not_found = 0;
|
|
2059
|
|
2060 u = r->upstream;
|
|
2061
|
|
2062 if (u == NULL || u->states.nelts == 0) {
|
|
2063 v->not_found = 1;
|
|
2064 return NGX_OK;
|
|
2065 }
|
|
2066
|
|
2067 len = u->states.nelts * (NGX_TIME_T_LEN + 4 + 2);
|
|
2068
|
|
2069 p = ngx_palloc(r->pool, len);
|
|
2070 if (p == NULL) {
|
|
2071 return NGX_ERROR;
|
|
2072 }
|
|
2073
|
|
2074 v->data = p;
|
|
2075
|
|
2076 i = 0;
|
|
2077 state = u->states.elts;
|
|
2078
|
|
2079 for ( ;; ) {
|
|
2080 if (state[i].status == 0) {
|
|
2081 *p++ = '-';
|
|
2082
|
|
2083 } else {
|
|
2084 p = ngx_sprintf(p, "%d.%03d",
|
|
2085 state[i].response_time / 1000,
|
|
2086 state[i].response_time % 1000);
|
|
2087 }
|
|
2088
|
|
2089 if (++i == u->states.nelts) {
|
|
2090 break;
|
|
2091 }
|
|
2092
|
|
2093 *p++ = ',';
|
|
2094 *p++ = ' ';
|
|
2095 }
|
|
2096
|
|
2097 v->len = p - v->data;
|
|
2098
|
|
2099 return NGX_OK;
|
|
2100 }
|
|
2101
|
|
2102
|
58
|
2103 static void *
|
|
2104 ngx_http_upstream_create_main_conf(ngx_conf_t *cf)
|
|
2105 {
|
|
2106 ngx_http_upstream_main_conf_t *umcf;
|
|
2107
|
|
2108 umcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_main_conf_t));
|
|
2109 if (umcf == NULL) {
|
|
2110 return NULL;
|
|
2111 }
|
|
2112
|
|
2113 return umcf;
|
|
2114 }
|
|
2115
|
|
2116
|
|
2117 static char *
|
|
2118 ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf)
|
|
2119 {
|
|
2120 ngx_http_upstream_main_conf_t *umcf = conf;
|
|
2121
|
|
2122 umcf->headers_in_hash.max_size = 100;
|
|
2123 umcf->headers_in_hash.bucket_limit = 1;
|
|
2124 umcf->headers_in_hash.bucket_size = sizeof(ngx_http_upstream_header_t);
|
|
2125 umcf->headers_in_hash.name = "upstream_headers_in";
|
|
2126
|
|
2127 if (ngx_hash_init(&umcf->headers_in_hash, cf->pool,
|
|
2128 ngx_http_upstream_headers_in, 0) != NGX_OK)
|
|
2129 {
|
|
2130 return NGX_CONF_ERROR;
|
|
2131 }
|
|
2132
|
|
2133 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, cf->log, 0,
|
|
2134 "http upstream headers_in hash size: %ui, "
|
|
2135 "max buckets per entry: %ui",
|
|
2136 umcf->headers_in_hash.hash_size,
|
|
2137 umcf->headers_in_hash.min_buckets);
|
|
2138
|
|
2139 return NGX_CONF_OK;
|
|
2140 }
|