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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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36
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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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36
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31 ngx_http_upstream_t *u, ngx_uint_t ft_type);
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28
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32 static void ngx_http_upstream_finalize_request(ngx_http_request_t *r,
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36
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33 ngx_http_upstream_t *u, ngx_int_t rc);
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28
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34
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58
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35 static ngx_int_t ngx_http_upstream_process_header_line(ngx_http_request_t *r,
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36 ngx_table_elt_t *h, ngx_uint_t offset);
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37 static ngx_int_t
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38 ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
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39 ngx_table_elt_t *h, ngx_uint_t offset);
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40 static ngx_int_t ngx_http_upstream_ignore_header_line(ngx_http_request_t *r,
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41 ngx_table_elt_t *h, ngx_uint_t offset);
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76
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42 static ngx_int_t ngx_http_upstream_process_limit_rate(ngx_http_request_t *r,
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43 ngx_table_elt_t *h, ngx_uint_t offset);
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58
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44 static ngx_int_t ngx_http_upstream_copy_header_line(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
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47 ngx_http_upstream_conditional_copy_header_line(ngx_http_request_t *r,
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48 ngx_table_elt_t *h, ngx_uint_t offset);
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49 static ngx_int_t
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50 ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r,
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51 ngx_table_elt_t *h, ngx_uint_t offset);
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52 static ngx_int_t ngx_http_upstream_copy_content_type(ngx_http_request_t *r,
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53 ngx_table_elt_t *h, ngx_uint_t offset);
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54 static ngx_int_t ngx_http_upstream_copy_content_length(ngx_http_request_t *r,
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55 ngx_table_elt_t *h, ngx_uint_t offset);
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56 static ngx_int_t ngx_http_upstream_rewrite_location(ngx_http_request_t *r,
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57 ngx_table_elt_t *h, ngx_uint_t offset);
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58 static ngx_int_t ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r,
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59 ngx_table_elt_t *h, ngx_uint_t offset);
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60 #if (NGX_HTTP_GZIP)
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61 static ngx_int_t ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r,
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62 ngx_table_elt_t *h, ngx_uint_t offset);
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63 #endif
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64
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28
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65 static size_t ngx_http_upstream_log_status_getlen(ngx_http_request_t *r,
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36
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66 uintptr_t data);
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67 static u_char *ngx_http_upstream_log_status(ngx_http_request_t *r,
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68 u_char *buf, ngx_http_log_op_t *op);
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112
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69 static u_char *ngx_http_upstream_log_response_time(ngx_http_request_t *r,
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70 u_char *buf, ngx_http_log_op_t *op);
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28
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71
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58
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72 static u_char *ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf,
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73 size_t len);
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28
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74 static ngx_int_t ngx_http_upstream_add_log_formats(ngx_conf_t *cf);
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58
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75 static void *ngx_http_upstream_create_main_conf(ngx_conf_t *cf);
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76 static char *ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf);
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77
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78
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79 ngx_http_upstream_header_t ngx_http_upstream_headers_in[] = {
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80
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81 { ngx_string("Status"),
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82 ngx_http_upstream_process_header_line,
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83 offsetof(ngx_http_upstream_headers_in_t, status),
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64
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84 /* STUB */ ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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85
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86 { ngx_string("Content-Type"),
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87 ngx_http_upstream_process_header_line,
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88 offsetof(ngx_http_upstream_headers_in_t, content_type),
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64
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89 ngx_http_upstream_copy_content_type, 0, 0 },
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58
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90
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91 { ngx_string("Content-Length"),
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92 ngx_http_upstream_process_header_line,
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93 offsetof(ngx_http_upstream_headers_in_t, content_length),
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64
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94 ngx_http_upstream_copy_content_length, 0, 0 },
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58
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95
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96 { ngx_string("Date"),
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97 ngx_http_upstream_process_header_line,
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98 offsetof(ngx_http_upstream_headers_in_t, date),
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99 ngx_http_upstream_conditional_copy_header_line,
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64
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100 offsetof(ngx_http_upstream_conf_t, pass_date), 0 },
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58
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101
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102 { ngx_string("Server"),
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103 ngx_http_upstream_process_header_line,
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104 offsetof(ngx_http_upstream_headers_in_t, server),
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105 ngx_http_upstream_conditional_copy_header_line,
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106 offsetof(ngx_http_upstream_conf_t, pass_server), 0 },
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58
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107
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78
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108 { ngx_string("WWW-Authenticate"),
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109 ngx_http_upstream_process_header_line,
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110 offsetof(ngx_http_upstream_headers_in_t, www_authenticate),
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111 ngx_http_upstream_copy_header_line, 0, 0 },
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112
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58
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113 { ngx_string("Location"),
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114 ngx_http_upstream_ignore_header_line, 0,
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64
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115 ngx_http_upstream_rewrite_location, 0, 0 },
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58
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116
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117 { ngx_string("Refresh"),
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118 ngx_http_upstream_ignore_header_line, 0,
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64
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119 ngx_http_upstream_rewrite_refresh, 0, 0 },
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120
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121 { ngx_string("Set-Cookie"),
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122 ngx_http_upstream_ignore_header_line, 0,
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80
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123 ngx_http_upstream_copy_header_line, 0, 1 },
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124
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125 { ngx_string("Content-Disposition"),
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126 ngx_http_upstream_ignore_header_line, 0,
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127 ngx_http_upstream_copy_header_line, 0, 1 },
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58
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128
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129 { ngx_string("Cache-Control"),
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130 ngx_http_upstream_process_multi_header_lines,
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131 offsetof(ngx_http_upstream_headers_in_t, cache_control),
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132 ngx_http_upstream_copy_multi_header_lines,
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64
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133 offsetof(ngx_http_headers_out_t, cache_control), 1 },
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58
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134
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135 { ngx_string("Connection"),
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136 ngx_http_upstream_ignore_header_line, 0,
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64
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137 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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138
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139 { ngx_string("X-Pad"),
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140 ngx_http_upstream_ignore_header_line, 0,
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64
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141 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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142
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143 { ngx_string("X-Powered-By"),
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144 ngx_http_upstream_ignore_header_line, 0,
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145 ngx_http_upstream_conditional_copy_header_line,
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64
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146 offsetof(ngx_http_upstream_conf_t, pass_x_powered_by), 0 },
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58
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147
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148 { ngx_string("X-Accel-Expires"),
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149 ngx_http_upstream_process_header_line,
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150 offsetof(ngx_http_upstream_headers_in_t, x_accel_expires),
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151 ngx_http_upstream_conditional_copy_header_line,
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64
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152 offsetof(ngx_http_upstream_conf_t, pass_x_accel_expires), 0 },
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153
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154 { ngx_string("X-Accel-Redirect"),
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155 ngx_http_upstream_process_header_line,
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156 offsetof(ngx_http_upstream_headers_in_t, x_accel_redirect),
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157 ngx_http_upstream_ignore_header_line, 0, 0 },
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58
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158
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76
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159 { ngx_string("X-Accel-Limit-Rate"),
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160 ngx_http_upstream_process_limit_rate, 0,
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161 ngx_http_upstream_ignore_header_line, 0, 0 },
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162
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58
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163 #if (NGX_HTTP_GZIP)
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164 { ngx_string("Content-Encoding"),
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165 ngx_http_upstream_process_header_line,
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166 offsetof(ngx_http_upstream_headers_in_t, content_encoding),
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167 ngx_http_upstream_copy_content_encoding, 0, 0 },
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58
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168 #endif
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169
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64
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170 { ngx_null_string, NULL, 0, NULL, 0, 0 }
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58
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171 };
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28
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172
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173
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174 ngx_http_module_t ngx_http_upstream_module_ctx = {
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58
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175 ngx_http_upstream_add_log_formats, /* preconfiguration */
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176 NULL, /* postconfiguration */
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177
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178 ngx_http_upstream_create_main_conf, /* create main configuration */
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179 ngx_http_core_init_main_conf, /* init main configuration */
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28
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180
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181 NULL, /* create server configuration */
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182 NULL, /* merge server configuration */
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183
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184 NULL, /* create location configuration */
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185 NULL /* merge location configuration */
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186 };
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187
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188
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189 ngx_module_t ngx_http_upstream_module = {
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190 NGX_MODULE_V1,
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191 &ngx_http_upstream_module_ctx, /* module context */
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192 NULL, /* module directives */
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193 NGX_HTTP_MODULE, /* module type */
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90
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194 NULL, /* init master */
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195 NULL, /* init module */
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90
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196 NULL, /* init process */
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197 NULL, /* init thread */
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198 NULL, /* exit thread */
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199 NULL, /* exit process */
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200 NULL, /* exit master */
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201 NGX_MODULE_V1_PADDING
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202 };
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203
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204
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205 static ngx_http_log_op_name_t ngx_http_upstream_log_fmt_ops[] = {
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206 { ngx_string("upstream_status"), 0, NULL,
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207 ngx_http_upstream_log_status_getlen,
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208 ngx_http_upstream_log_status },
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112
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209 { ngx_string("upstream_response_time"), NGX_TIME_T_LEN + 4, NULL, NULL,
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210 ngx_http_upstream_log_response_time },
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28
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211 { ngx_null_string, 0, NULL, NULL, NULL }
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212 };
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213
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214
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215 char *ngx_http_upstream_header_errors[] = {
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216 "upstream sent invalid header",
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217 "upstream sent too long header line"
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218 };
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219
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220
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36
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221 void
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222 ngx_http_upstream_init(ngx_http_request_t *r)
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223 {
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112
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224 ngx_time_t *tp;
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225 ngx_connection_t *c;
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226 ngx_http_upstream_t *u;
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227 ngx_http_core_loc_conf_t *clcf;
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28
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228
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229 c = r->connection;
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230
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231 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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232 "http init upstream, client timer: %d", c->read->timer_set);
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233
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234 if (c->read->timer_set) {
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235 ngx_del_timer(c->read);
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236 }
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237
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238 r->read_event_handler = ngx_http_upstream_rd_check_broken_connection;
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80
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239 r->write_event_handler = ngx_http_upstream_wr_check_broken_connection;
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28
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240
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241 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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242
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243 if (!c->write->active) {
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80
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244 if (ngx_add_event(c->write, NGX_WRITE_EVENT, NGX_CLEAR_EVENT)
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245 == NGX_ERROR)
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28
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246 {
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247 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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248 return;
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249 }
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250 }
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251 }
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252
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253 u = r->upstream;
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254
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86
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255 if (r->request_body) {
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256 u->request_bufs = r->request_body->bufs;
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257 }
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58
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258
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86
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259 if (u->create_request(r) != NGX_OK) {
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260 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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261 return;
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262 }
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263
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264 u->peer.log = r->connection->log;
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58
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265 u->saved_log_handler = r->log_handler;
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266 r->log_handler = ngx_http_upstream_log_error;
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267
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268 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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28
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269
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270 u->output.sendfile = r->connection->sendfile;
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271 u->output.pool = r->pool;
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272 u->output.bufs.num = 1;
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58
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273 u->output.bufs.size = clcf->client_body_buffer_size;
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28
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274 u->output.output_filter = ngx_chain_writer;
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275 u->output.filter_ctx = &u->writer;
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276
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277 u->writer.pool = r->pool;
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278
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279 if (ngx_array_init(&u->states, r->pool, u->peer.peers->number,
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50
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280 sizeof(ngx_http_upstream_state_t)) != NGX_OK)
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28
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281 {
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282 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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283 return;
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284 }
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285
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50
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286 u->state = ngx_array_push(&u->states);
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287 if (u->state == NULL) {
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28
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288 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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289 return;
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290 }
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291
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292 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
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293
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112
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294 tp = ngx_timeofday();
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295
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296 u->state->response_time = tp->sec * 1000 + tp->msec;
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297
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28
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298 ngx_http_upstream_connect(r, u);
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299 }
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300
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301
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36
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302 static void
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58
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303 ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r)
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304 {
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305 ngx_http_upstream_check_broken_connection(r, r->connection->read);
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306 }
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307
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308
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309 static void
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310 ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r)
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311 {
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312 ngx_http_upstream_check_broken_connection(r, r->connection->write);
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313 }
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314
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315
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316 static void
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317 ngx_http_upstream_check_broken_connection(ngx_http_request_t *r,
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318 ngx_event_t *ev)
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28
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319 {
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320 int n;
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321 char buf[1];
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322 ngx_err_t err;
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323 ngx_connection_t *c;
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324 ngx_http_upstream_t *u;
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325
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76
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326 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ev->log, 0,
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327 "http upstream check client, write event:%d, \"%V\"",
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328 ev->write, &r->uri);
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28
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329
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58
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330 c = r->connection;
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32
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331 u = r->upstream;
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332
|
|
76
|
333 if (c->closed) {
|
|
|
334 ngx_http_upstream_finalize_request(r, u,
|
|
|
335 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
336 return;
|
|
|
337 }
|
|
|
338
|
|
32
|
339 if (u->peer.connection == NULL) {
|
|
|
340 return;
|
|
|
341 }
|
|
|
342
|
|
28
|
343 #if (NGX_HAVE_KQUEUE)
|
|
|
344
|
|
|
345 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
|
|
346
|
|
|
347 if (!ev->pending_eof) {
|
|
|
348 return;
|
|
|
349 }
|
|
|
350
|
|
|
351 ev->eof = 1;
|
|
76
|
352 c->closed = 1;
|
|
28
|
353
|
|
|
354 if (ev->kq_errno) {
|
|
|
355 ev->error = 1;
|
|
|
356 }
|
|
|
357
|
|
|
358 if (!u->cachable && u->peer.connection) {
|
|
|
359 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
|
|
76
|
360 "kevent() reported that client closed prematurely "
|
|
|
361 "connection, so upstream connection is closed too");
|
|
28
|
362 ngx_http_upstream_finalize_request(r, u,
|
|
|
363 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
364 return;
|
|
|
365 }
|
|
|
366
|
|
|
367 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
|
|
|
368 "kevent() reported that client closed "
|
|
|
369 "prematurely connection");
|
|
|
370
|
|
|
371 if (u->peer.connection == NULL) {
|
|
|
372 ngx_http_upstream_finalize_request(r, u,
|
|
|
373 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
374 return;
|
|
|
375 }
|
|
|
376
|
|
|
377 return;
|
|
|
378 }
|
|
|
379
|
|
|
380 #endif
|
|
|
381
|
|
|
382 n = recv(c->fd, buf, 1, MSG_PEEK);
|
|
|
383
|
|
|
384 err = ngx_socket_errno;
|
|
|
385
|
|
|
386 /*
|
|
|
387 * we do not need to disable the write event because
|
|
|
388 * that event has NGX_USE_CLEAR_EVENT type
|
|
|
389 */
|
|
|
390
|
|
|
391 if (ev->write && (n >= 0 || err == NGX_EAGAIN)) {
|
|
|
392 return;
|
|
|
393 }
|
|
|
394
|
|
|
395 if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && ev->active) {
|
|
|
396 if (ngx_del_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) {
|
|
|
397 ngx_http_upstream_finalize_request(r, u,
|
|
|
398 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
399 return;
|
|
|
400 }
|
|
|
401 }
|
|
|
402
|
|
|
403 if (n > 0) {
|
|
|
404 return;
|
|
|
405 }
|
|
|
406
|
|
|
407 if (n == -1) {
|
|
|
408 if (err == NGX_EAGAIN) {
|
|
|
409 return;
|
|
|
410 }
|
|
|
411
|
|
|
412 ev->error = 1;
|
|
|
413
|
|
32
|
414 } else { /* n == 0 */
|
|
28
|
415 err = 0;
|
|
|
416 }
|
|
|
417
|
|
78
|
418 ev->eof = 1;
|
|
|
419 c->closed = 1;
|
|
|
420
|
|
28
|
421 if (!u->cachable && u->peer.connection) {
|
|
|
422 ngx_log_error(NGX_LOG_INFO, ev->log, err,
|
|
|
423 "client closed prematurely connection, "
|
|
|
424 "so upstream connection is closed too");
|
|
|
425 ngx_http_upstream_finalize_request(r, u,
|
|
|
426 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
427 return;
|
|
|
428 }
|
|
|
429
|
|
|
430 ngx_log_error(NGX_LOG_INFO, ev->log, err,
|
|
|
431 "client closed prematurely connection");
|
|
|
432
|
|
|
433 if (u->peer.connection == NULL) {
|
|
|
434 ngx_http_upstream_finalize_request(r, u,
|
|
|
435 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
436 return;
|
|
|
437 }
|
|
|
438 }
|
|
|
439
|
|
|
440
|
|
36
|
441 static void
|
|
|
442 ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
|
28
|
443 {
|
|
|
444 ngx_int_t rc;
|
|
|
445 ngx_connection_t *c;
|
|
|
446
|
|
32
|
447 r->connection->log->action = "connecting to upstream";
|
|
28
|
448
|
|
|
449 r->connection->single_connection = 0;
|
|
|
450
|
|
|
451 rc = ngx_event_connect_peer(&u->peer);
|
|
|
452
|
|
|
453 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
454 "http upstream connect: %i", rc);
|
|
|
455
|
|
|
456 if (rc == NGX_ERROR) {
|
|
|
457 ngx_http_upstream_finalize_request(r, u,
|
|
|
458 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
459 return;
|
|
|
460 }
|
|
|
461
|
|
|
462 u->state->peer = &u->peer.peers->peer[u->peer.cur_peer].name;
|
|
|
463
|
|
92
|
464 if (rc == NGX_BUSY) {
|
|
|
465 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams");
|
|
|
466 }
|
|
|
467
|
|
|
468 if (rc == NGX_BUSY || rc == NGX_DECLINED) {
|
|
28
|
469 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
470 return;
|
|
|
471 }
|
|
|
472
|
|
|
473 c = u->peer.connection;
|
|
|
474
|
|
|
475 c->data = r;
|
|
58
|
476 c->write->handler = ngx_http_upstream_send_request_handler;
|
|
|
477 c->read->handler = ngx_http_upstream_process_header;
|
|
28
|
478
|
|
|
479 c->sendfile = r->connection->sendfile;
|
|
|
480
|
|
|
481 c->pool = r->pool;
|
|
|
482 c->read->log = c->write->log = c->log = r->connection->log;
|
|
|
483
|
|
|
484 /* init or reinit the ngx_output_chain() and ngx_chain_writer() contexts */
|
|
|
485
|
|
|
486 u->writer.out = NULL;
|
|
|
487 u->writer.last = &u->writer.out;
|
|
|
488 u->writer.connection = c;
|
|
|
489 u->writer.limit = 0;
|
|
|
490
|
|
|
491 if (u->request_sent) {
|
|
58
|
492 if (ngx_http_upstream_reinit(r, u) != NGX_OK) {
|
|
|
493 ngx_http_upstream_finalize_request(r, u,
|
|
|
494 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
495 return;
|
|
|
496 }
|
|
28
|
497 }
|
|
|
498
|
|
58
|
499 if (r->request_body) {
|
|
102
|
500 if (r->request_body->temp_file && r->main == r) {
|
|
58
|
501
|
|
|
502 /*
|
|
|
503 * the r->request_body->buf can be reused for one request only,
|
|
|
504 * the subrequests should allocate their own temporay bufs
|
|
|
505 */
|
|
28
|
506
|
|
50
|
507 u->output.free = ngx_alloc_chain_link(r->pool);
|
|
|
508 if (u->output.free == NULL) {
|
|
28
|
509 ngx_http_upstream_finalize_request(r, u,
|
|
|
510 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
511 return;
|
|
|
512 }
|
|
|
513
|
|
|
514 u->output.free->buf = r->request_body->buf;
|
|
|
515 u->output.free->next = NULL;
|
|
|
516 u->output.allocated = 1;
|
|
|
517
|
|
|
518 r->request_body->buf->pos = r->request_body->buf->start;
|
|
|
519 r->request_body->buf->last = r->request_body->buf->start;
|
|
|
520 r->request_body->buf->tag = u->output.tag;
|
|
|
521 }
|
|
|
522 }
|
|
|
523
|
|
|
524 u->request_sent = 0;
|
|
|
525
|
|
|
526 if (rc == NGX_AGAIN) {
|
|
|
527 ngx_add_timer(c->write, u->conf->connect_timeout);
|
|
|
528 return;
|
|
|
529 }
|
|
|
530
|
|
|
531 /* rc == NGX_OK */
|
|
|
532
|
|
|
533 ngx_http_upstream_send_request(r, u);
|
|
|
534 }
|
|
|
535
|
|
|
536
|
|
58
|
537 static ngx_int_t
|
|
36
|
538 ngx_http_upstream_reinit(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
|
28
|
539 {
|
|
|
540 ngx_chain_t *cl;
|
|
|
541
|
|
58
|
542 if (u->reinit_request(r) != NGX_OK) {
|
|
|
543 return NGX_ERROR;
|
|
|
544 }
|
|
|
545
|
|
|
546 ngx_memzero(&r->upstream->headers_in,
|
|
|
547 sizeof(ngx_http_upstream_headers_in_t));
|
|
|
548
|
|
|
549 if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8,
|
|
|
550 sizeof(ngx_table_elt_t)) != NGX_OK)
|
|
|
551 {
|
|
|
552 return NGX_ERROR;
|
|
28
|
553 }
|
|
|
554
|
|
|
555 /* reinit the request chain */
|
|
|
556
|
|
58
|
557 for (cl = u->request_bufs; cl; cl = cl->next) {
|
|
28
|
558 cl->buf->pos = cl->buf->start;
|
|
|
559 cl->buf->file_pos = 0;
|
|
|
560 }
|
|
|
561
|
|
58
|
562 /* reinit the subrequest's ngx_output_chain() context */
|
|
|
563
|
|
|
564 if (r->request_body) {
|
|
102
|
565 if (r->request_body->temp_file && r->main != r && u->output.buf) {
|
|
58
|
566
|
|
|
567 u->output.free = ngx_alloc_chain_link(r->pool);
|
|
|
568 if (u->output.free == NULL) {
|
|
|
569 return NGX_ERROR;
|
|
|
570 }
|
|
|
571
|
|
|
572 u->output.free->buf = u->output.buf;
|
|
|
573 u->output.free->next = NULL;
|
|
|
574
|
|
|
575 u->output.buf->pos = u->output.buf->start;
|
|
|
576 u->output.buf->last = u->output.buf->start;
|
|
|
577 }
|
|
|
578 }
|
|
28
|
579
|
|
|
580 u->output.buf = NULL;
|
|
|
581 u->output.in = NULL;
|
|
|
582 u->output.busy = NULL;
|
|
|
583
|
|
|
584 /* reinit u->header_in buffer */
|
|
|
585
|
|
|
586 #if 0
|
|
|
587 if (u->cache) {
|
|
|
588 u->header_in.pos = u->header_in.start + u->cache->ctx.header_size;
|
|
|
589 u->header_in.last = u->header_in.pos;
|
|
|
590
|
|
|
591 } else {
|
|
|
592 u->header_in.pos = u->header_in.start;
|
|
|
593 u->header_in.last = u->header_in.start;
|
|
|
594 }
|
|
|
595 #else
|
|
58
|
596
|
|
28
|
597 u->header_in.pos = u->header_in.start;
|
|
|
598 u->header_in.last = u->header_in.start;
|
|
58
|
599
|
|
28
|
600 #endif
|
|
|
601
|
|
|
602 /* add one more state */
|
|
|
603
|
|
50
|
604 u->state = ngx_array_push(&u->states);
|
|
|
605 if (u->state == NULL) {
|
|
58
|
606 return NGX_ERROR;
|
|
28
|
607 }
|
|
|
608
|
|
|
609 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
|
|
58
|
610
|
|
|
611 return NGX_OK;
|
|
28
|
612 }
|
|
|
613
|
|
|
614
|
|
36
|
615 static void
|
|
|
616 ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
|
28
|
617 {
|
|
32
|
618 int rc;
|
|
|
619 ngx_connection_t *c;
|
|
28
|
620
|
|
|
621 c = u->peer.connection;
|
|
|
622
|
|
|
623 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
624 "http upstream send request");
|
|
|
625
|
|
|
626 #if (NGX_HAVE_KQUEUE)
|
|
|
627
|
|
|
628 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT)
|
|
|
629 && !u->request_sent
|
|
|
630 && c->write->pending_eof)
|
|
|
631 {
|
|
86
|
632 (void) ngx_connection_error(c, c->write->kq_errno,
|
|
|
633 "kevent() reported that connect() failed");
|
|
28
|
634 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
635 return;
|
|
|
636 }
|
|
|
637
|
|
|
638 #endif
|
|
|
639
|
|
32
|
640 c->log->action = "sending request to upstream";
|
|
28
|
641
|
|
58
|
642 rc = ngx_output_chain(&u->output, u->request_sent ? NULL : u->request_bufs);
|
|
28
|
643
|
|
|
644 u->request_sent = 1;
|
|
|
645
|
|
|
646 if (rc == NGX_ERROR) {
|
|
|
647 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
648 return;
|
|
|
649 }
|
|
|
650
|
|
|
651 if (c->write->timer_set) {
|
|
|
652 ngx_del_timer(c->write);
|
|
|
653 }
|
|
|
654
|
|
|
655 if (rc == NGX_AGAIN) {
|
|
|
656 ngx_add_timer(c->write, u->conf->send_timeout);
|
|
|
657
|
|
|
658 if (ngx_handle_write_event(c->write, u->conf->send_lowat) == NGX_ERROR)
|
|
|
659 {
|
|
|
660 ngx_http_upstream_finalize_request(r, u,
|
|
|
661 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
662 return;
|
|
|
663 }
|
|
|
664
|
|
|
665 return;
|
|
|
666 }
|
|
|
667
|
|
|
668 /* rc == NGX_OK */
|
|
|
669
|
|
|
670 if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) {
|
|
|
671 if (ngx_tcp_push(c->fd) == NGX_ERROR) {
|
|
|
672 ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno,
|
|
|
673 ngx_tcp_push_n " failed");
|
|
|
674 ngx_http_upstream_finalize_request(r, u,
|
|
|
675 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
676 return;
|
|
|
677 }
|
|
|
678
|
|
|
679 c->tcp_nopush = NGX_TCP_NOPUSH_UNSET;
|
|
|
680 return;
|
|
|
681 }
|
|
|
682
|
|
|
683 ngx_add_timer(c->read, u->conf->read_timeout);
|
|
|
684
|
|
|
685 #if 1
|
|
|
686 if (c->read->ready) {
|
|
|
687
|
|
|
688 /* post aio operation */
|
|
|
689
|
|
|
690 /*
|
|
|
691 * TODO comment
|
|
|
692 * although we can post aio operation just in the end
|
|
|
693 * of ngx_http_upstream_connect() CHECK IT !!!
|
|
|
694 * it's better to do here because we postpone header buffer allocation
|
|
|
695 */
|
|
|
696
|
|
|
697 ngx_http_upstream_process_header(c->read);
|
|
|
698 return;
|
|
|
699 }
|
|
|
700 #endif
|
|
|
701
|
|
58
|
702 c->write->handler = ngx_http_upstream_dummy_handler;
|
|
28
|
703
|
|
58
|
704 if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
|
|
28
|
705 ngx_http_upstream_finalize_request(r, u,
|
|
|
706 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
707 return;
|
|
|
708 }
|
|
|
709 }
|
|
|
710
|
|
|
711
|
|
36
|
712 static void
|
|
|
713 ngx_http_upstream_send_request_handler(ngx_event_t *wev)
|
|
28
|
714 {
|
|
|
715 ngx_connection_t *c;
|
|
|
716 ngx_http_request_t *r;
|
|
|
717 ngx_http_upstream_t *u;
|
|
|
718
|
|
|
719 c = wev->data;
|
|
|
720 r = c->data;
|
|
|
721 u = r->upstream;
|
|
|
722
|
|
|
723 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
|
724 "http upstream send request handler");
|
|
|
725
|
|
|
726 if (wev->timedout) {
|
|
32
|
727 c->log->action = "sending request to upstream";
|
|
28
|
728 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
|
729 return;
|
|
|
730 }
|
|
|
731
|
|
|
732 ngx_http_upstream_send_request(r, u);
|
|
|
733 }
|
|
|
734
|
|
|
735
|
|
36
|
736 static void
|
|
|
737 ngx_http_upstream_process_header(ngx_event_t *rev)
|
|
28
|
738 {
|
|
64
|
739 ssize_t n;
|
|
|
740 ngx_int_t rc;
|
|
|
741 ngx_uint_t i, key;
|
|
|
742 ngx_list_part_t *part;
|
|
|
743 ngx_table_elt_t *h;
|
|
|
744 ngx_connection_t *c;
|
|
|
745 ngx_http_request_t *r;
|
|
|
746 ngx_http_upstream_t *u;
|
|
|
747 ngx_http_err_page_t *err_page;
|
|
|
748 ngx_http_core_loc_conf_t *clcf;
|
|
|
749 ngx_http_upstream_header_t *hh;
|
|
|
750 ngx_http_upstream_main_conf_t *umcf;
|
|
28
|
751
|
|
|
752 c = rev->data;
|
|
|
753 r = c->data;
|
|
|
754 u = r->upstream;
|
|
|
755
|
|
|
756 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
|
|
32
|
757 "http upstream process header");
|
|
28
|
758
|
|
32
|
759 c->log->action = "reading response header from upstream";
|
|
28
|
760
|
|
|
761 if (rev->timedout) {
|
|
|
762 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
|
763 return;
|
|
|
764 }
|
|
|
765
|
|
|
766 if (u->header_in.start == NULL) {
|
|
|
767 u->header_in.start = ngx_palloc(r->pool, u->conf->header_buffer_size);
|
|
|
768 if (u->header_in.start == NULL) {
|
|
|
769 ngx_http_upstream_finalize_request(r, u,
|
|
|
770 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
771 return;
|
|
|
772 }
|
|
|
773
|
|
|
774 u->header_in.pos = u->header_in.start;
|
|
|
775 u->header_in.last = u->header_in.start;
|
|
32
|
776 u->header_in.end = u->header_in.start + u->conf->header_buffer_size;
|
|
28
|
777 u->header_in.temporary = 1;
|
|
|
778
|
|
|
779 u->header_in.tag = u->output.tag;
|
|
|
780
|
|
58
|
781 if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8,
|
|
|
782 sizeof(ngx_table_elt_t)) == NGX_ERROR)
|
|
|
783 {
|
|
|
784 ngx_http_upstream_finalize_request(r, u,
|
|
|
785 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
786 return;
|
|
|
787 }
|
|
|
788
|
|
28
|
789 #if 0
|
|
|
790 if (u->cache) {
|
|
|
791 u->header_in.pos += u->cache->ctx.header_size;
|
|
|
792 u->header_in.last = u->header_in.pos;
|
|
|
793 }
|
|
|
794 #endif
|
|
|
795 }
|
|
|
796
|
|
|
797 n = ngx_recv(u->peer.connection, u->header_in.last,
|
|
|
798 u->header_in.end - u->header_in.last);
|
|
|
799
|
|
|
800 if (n == NGX_AGAIN) {
|
|
|
801 #if 0
|
|
|
802 ngx_add_timer(rev, u->read_timeout);
|
|
|
803 #endif
|
|
|
804
|
|
|
805 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
806 ngx_http_upstream_finalize_request(r, u,
|
|
|
807 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
808 return;
|
|
|
809 }
|
|
|
810
|
|
|
811 return;
|
|
|
812 }
|
|
|
813
|
|
|
814 if (n == 0) {
|
|
|
815 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
|
816 "upstream prematurely closed connection");
|
|
|
817 }
|
|
|
818
|
|
|
819 if (n == NGX_ERROR || n == 0) {
|
|
|
820 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
821 return;
|
|
|
822 }
|
|
|
823
|
|
|
824 u->header_in.last += n;
|
|
|
825
|
|
|
826 #if 0
|
|
|
827 u->valid_header_in = 0;
|
|
|
828
|
|
|
829 u->peer.cached = 0;
|
|
|
830 #endif
|
|
|
831
|
|
|
832 rc = u->process_header(r);
|
|
|
833
|
|
|
834 if (rc == NGX_AGAIN) {
|
|
|
835 #if 0
|
|
|
836 ngx_add_timer(rev, u->read_timeout);
|
|
|
837 #endif
|
|
|
838
|
|
58
|
839 if (u->header_in.pos == u->header_in.end) {
|
|
28
|
840 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
|
841 "upstream sent too big header");
|
|
|
842
|
|
|
843 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
|
844 return;
|
|
|
845 }
|
|
|
846
|
|
|
847 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
848 ngx_http_upstream_finalize_request(r, u,
|
|
|
849 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
850 return;
|
|
|
851 }
|
|
|
852
|
|
|
853 return;
|
|
|
854 }
|
|
|
855
|
|
|
856 if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) {
|
|
|
857 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
|
858 return;
|
|
|
859 }
|
|
|
860
|
|
|
861 if (rc == NGX_ERROR || rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
|
862 ngx_http_upstream_finalize_request(r, u,
|
|
|
863 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
864 return;
|
|
|
865 }
|
|
|
866
|
|
|
867 /* rc == NGX_OK */
|
|
|
868
|
|
78
|
869 if (u->headers_in.status_n == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
58
|
870
|
|
|
871 if (u->peer.tries > 1
|
|
|
872 && (u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_500))
|
|
|
873 {
|
|
|
874 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_500);
|
|
|
875 return;
|
|
|
876 }
|
|
|
877
|
|
|
878 #if (NGX_HTTP_CACHE)
|
|
|
879
|
|
|
880 if (u->peer.tries == 0
|
|
|
881 && u->stale
|
|
|
882 && (u->conf->use_stale & NGX_HTTP_UPSTREAM_FT_HTTP_500))
|
|
|
883 {
|
|
|
884 ngx_http_upstream_finalize_request(r, u,
|
|
78
|
885 ngx_http_send_cached_response(r));
|
|
58
|
886 return;
|
|
|
887 }
|
|
|
888
|
|
|
889 #endif
|
|
|
890 }
|
|
|
891
|
|
78
|
892 if (u->headers_in.status_n == NGX_HTTP_NOT_FOUND
|
|
58
|
893 && u->peer.tries > 1
|
|
|
894 && u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_404)
|
|
|
895 {
|
|
|
896 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_404);
|
|
|
897 return;
|
|
|
898 }
|
|
|
899
|
|
|
900
|
|
78
|
901 if (u->headers_in.status_n >= NGX_HTTP_BAD_REQUEST
|
|
36
|
902 && u->conf->redirect_errors
|
|
|
903 && r->err_ctx == NULL)
|
|
|
904 {
|
|
|
905 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
906
|
|
|
907 if (clcf->error_pages) {
|
|
|
908
|
|
|
909 err_page = clcf->error_pages->elts;
|
|
|
910 for (i = 0; i < clcf->error_pages->nelts; i++) {
|
|
78
|
911 if (err_page[i].status == (ngx_int_t) u->headers_in.status_n) {
|
|
|
912
|
|
|
913 if (u->headers_in.status_n == NGX_HTTP_UNAUTHORIZED) {
|
|
|
914
|
|
|
915 r->headers_out.www_authenticate =
|
|
|
916 ngx_list_push(&r->headers_out.headers);
|
|
|
917
|
|
|
918 if (r->headers_out.www_authenticate == NULL) {
|
|
|
919 ngx_http_upstream_finalize_request(r, u,
|
|
|
920 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
921 return;
|
|
|
922 }
|
|
|
923
|
|
|
924 *r->headers_out.www_authenticate =
|
|
|
925 *u->headers_in.www_authenticate;
|
|
|
926 }
|
|
|
927
|
|
36
|
928 ngx_http_upstream_finalize_request(r, u,
|
|
78
|
929 u->headers_in.status_n);
|
|
36
|
930 return;
|
|
|
931 }
|
|
|
932 }
|
|
|
933 }
|
|
|
934 }
|
|
|
935
|
|
64
|
936 if (r->upstream->headers_in.x_accel_redirect) {
|
|
|
937 ngx_http_upstream_finalize_request(r, u, NGX_DECLINED);
|
|
|
938
|
|
|
939 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
|
|
|
940 hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets;
|
|
|
941
|
|
|
942 part = &r->upstream->headers_in.headers.part;
|
|
|
943 h = part->elts;
|
|
|
944
|
|
|
945 for (i = 0; /* void */; i++) {
|
|
|
946
|
|
|
947 if (i >= part->nelts) {
|
|
|
948 if (part->next == NULL) {
|
|
|
949 break;
|
|
|
950 }
|
|
|
951
|
|
|
952 part = part->next;
|
|
|
953 h = part->elts;
|
|
|
954 i = 0;
|
|
|
955 }
|
|
|
956
|
|
|
957 key = h[i].hash % umcf->headers_in_hash.hash_size;
|
|
|
958
|
|
|
959 if (hh[key].redirect
|
|
|
960 && hh[key].name.len == h[i].key.len
|
|
|
961 && ngx_strcasecmp(hh[key].name.data, h[i].key.data) == 0)
|
|
|
962 {
|
|
|
963 if (hh[key].copy_handler(r, &h[i], hh[key].conf) != NGX_OK) {
|
|
|
964 ngx_http_upstream_finalize_request(r, u,
|
|
|
965 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
966 return;
|
|
|
967 }
|
|
|
968
|
|
|
969 }
|
|
|
970 }
|
|
|
971
|
|
|
972 ngx_http_internal_redirect(r,
|
|
|
973 &r->upstream->headers_in.x_accel_redirect->value,
|
|
|
974 NULL);
|
|
|
975 return;
|
|
|
976 }
|
|
|
977
|
|
28
|
978 ngx_http_upstream_send_response(r, u);
|
|
|
979 }
|
|
|
980
|
|
|
981
|
|
36
|
982 static void
|
|
|
983 ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u)
|
|
28
|
984 {
|
|
58
|
985 ngx_int_t rc;
|
|
|
986 ngx_uint_t i, key;
|
|
|
987 ngx_list_part_t *part;
|
|
|
988 ngx_table_elt_t *h;
|
|
|
989 ngx_event_pipe_t *p;
|
|
112
|
990 ngx_pool_cleanup_t *cl;
|
|
|
991 ngx_pool_cleanup_file_t *clf;
|
|
58
|
992 ngx_http_core_loc_conf_t *clcf;
|
|
|
993 ngx_http_upstream_header_t *hh;
|
|
|
994 ngx_http_upstream_main_conf_t *umcf;
|
|
|
995
|
|
|
996 umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
|
|
|
997 hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets;
|
|
|
998
|
|
|
999 part = &r->upstream->headers_in.headers.part;
|
|
|
1000 h = part->elts;
|
|
|
1001
|
|
|
1002 for (i = 0; /* void */; i++) {
|
|
28
|
1003
|
|
58
|
1004 if (i >= part->nelts) {
|
|
|
1005 if (part->next == NULL) {
|
|
|
1006 break;
|
|
|
1007 }
|
|
|
1008
|
|
|
1009 part = part->next;
|
|
|
1010 h = part->elts;
|
|
|
1011 i = 0;
|
|
|
1012 }
|
|
|
1013
|
|
|
1014 key = h[i].hash % umcf->headers_in_hash.hash_size;
|
|
|
1015
|
|
|
1016 if (hh[key].name.len == h[i].key.len
|
|
|
1017 && ngx_strcasecmp(hh[key].name.data, h[i].key.data) == 0)
|
|
|
1018 {
|
|
|
1019 if (hh[key].copy_handler(r, &h[i], hh[key].conf) != NGX_OK) {
|
|
|
1020 ngx_http_upstream_finalize_request(r, u,
|
|
|
1021 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
1022 return;
|
|
|
1023 }
|
|
|
1024
|
|
|
1025 continue;
|
|
|
1026 }
|
|
|
1027
|
|
|
1028 if (ngx_http_upstream_copy_header_line(r, &h[i], 0) != NGX_OK) {
|
|
|
1029 ngx_http_upstream_finalize_request(r, u,
|
|
|
1030 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
1031 return;
|
|
|
1032 }
|
|
|
1033 }
|
|
|
1034
|
|
78
|
1035 r->headers_out.status = u->headers_in.status_n;
|
|
|
1036 r->headers_out.status_line = u->headers_in.status_line;
|
|
|
1037
|
|
58
|
1038 rc = ngx_http_send_header(r);
|
|
28
|
1039
|
|
34
|
1040 if (rc == NGX_ERROR || rc > NGX_OK) {
|
|
|
1041 ngx_http_upstream_finalize_request(r, u, rc);
|
|
28
|
1042 return;
|
|
|
1043 }
|
|
|
1044
|
|
|
1045 u->header_sent = 1;
|
|
|
1046
|
|
112
|
1047 if (r->request_body->temp_file) {
|
|
|
1048 for (cl = r->pool->cleanup; cl; cl = cl->next) {
|
|
|
1049 if (cl->handler == ngx_pool_cleanup_file) {
|
|
|
1050 clf = cl->data;
|
|
|
1051
|
|
|
1052 if (clf->fd == r->request_body->temp_file->file.fd) {
|
|
|
1053 cl->handler(clf);
|
|
|
1054 cl->handler = NULL;
|
|
|
1055 break;
|
|
|
1056 }
|
|
|
1057 }
|
|
|
1058 }
|
|
|
1059 }
|
|
|
1060
|
|
28
|
1061 /* TODO: preallocate event_pipe bufs, look "Content-Length" */
|
|
|
1062
|
|
|
1063 #if 0
|
|
|
1064
|
|
|
1065 if (u->cache && u->cache->ctx.file.fd != NGX_INVALID_FILE) {
|
|
|
1066 if (ngx_close_file(u->cache->ctx.file.fd) == NGX_FILE_ERROR) {
|
|
|
1067 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
|
|
|
1068 ngx_close_file_n " \"%s\" failed",
|
|
|
1069 u->cache->ctx.file.name.data);
|
|
|
1070 }
|
|
|
1071 }
|
|
|
1072
|
|
|
1073 if (u->cachable) {
|
|
|
1074 header = (ngx_http_cache_header_t *) u->header_in->start;
|
|
|
1075
|
|
|
1076 header->expires = u->cache->ctx.expires;
|
|
|
1077 header->last_modified = u->cache->ctx.last_modified;
|
|
|
1078 header->date = u->cache->ctx.date;
|
|
|
1079 header->length = r->headers_out.content_length_n;
|
|
|
1080 u->cache->ctx.length = r->headers_out.content_length_n;
|
|
|
1081
|
|
|
1082 header->key_len = u->cache->ctx.key0.len;
|
|
|
1083 ngx_memcpy(&header->key, u->cache->ctx.key0.data, header->key_len);
|
|
|
1084 header->key[header->key_len] = LF;
|
|
|
1085 }
|
|
|
1086
|
|
|
1087 #endif
|
|
|
1088
|
|
|
1089 p = &u->pipe;
|
|
|
1090
|
|
|
1091 p->output_filter = (ngx_event_pipe_output_filter_pt) ngx_http_output_filter;
|
|
|
1092 p->output_ctx = r;
|
|
|
1093 p->tag = u->output.tag;
|
|
|
1094 p->bufs = u->conf->bufs;
|
|
|
1095 p->busy_size = u->conf->busy_buffers_size;
|
|
|
1096 p->upstream = u->peer.connection;
|
|
|
1097 p->downstream = r->connection;
|
|
|
1098 p->pool = r->pool;
|
|
|
1099 p->log = r->connection->log;
|
|
|
1100
|
|
|
1101 p->cachable = u->cachable;
|
|
|
1102
|
|
50
|
1103 p->temp_file = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
|
|
|
1104 if (p->temp_file == NULL) {
|
|
28
|
1105 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1106 return;
|
|
|
1107 }
|
|
|
1108
|
|
|
1109 p->temp_file->file.fd = NGX_INVALID_FILE;
|
|
|
1110 p->temp_file->file.log = r->connection->log;
|
|
|
1111 p->temp_file->path = u->conf->temp_path;
|
|
|
1112 p->temp_file->pool = r->pool;
|
|
|
1113
|
|
|
1114 if (u->cachable) {
|
|
|
1115 p->temp_file->persistent = 1;
|
|
|
1116 } else {
|
|
|
1117 p->temp_file->warn = "an upstream response is buffered "
|
|
|
1118 "to a temporary file";
|
|
|
1119 }
|
|
|
1120
|
|
|
1121 p->max_temp_file_size = u->conf->max_temp_file_size;
|
|
|
1122 p->temp_file_write_size = u->conf->temp_file_write_size;
|
|
|
1123
|
|
50
|
1124 p->preread_bufs = ngx_alloc_chain_link(r->pool);
|
|
|
1125 if (p->preread_bufs == NULL) {
|
|
28
|
1126 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1127 return;
|
|
|
1128 }
|
|
|
1129 p->preread_bufs->buf = &u->header_in;
|
|
|
1130 p->preread_bufs->next = NULL;
|
|
|
1131 u->header_in.recycled = 1;
|
|
|
1132
|
|
|
1133 p->preread_size = u->header_in.last - u->header_in.pos;
|
|
|
1134
|
|
|
1135 if (u->cachable) {
|
|
|
1136 p->buf_to_file = ngx_calloc_buf(r->pool);
|
|
|
1137 if (p->buf_to_file == NULL) {
|
|
|
1138 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1139 return;
|
|
|
1140 }
|
|
|
1141 p->buf_to_file->pos = u->header_in.start;
|
|
|
1142 p->buf_to_file->last = u->header_in.pos;
|
|
|
1143 p->buf_to_file->temporary = 1;
|
|
|
1144 }
|
|
|
1145
|
|
|
1146 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
|
|
|
1147 /* the posted aio operation may currupt a shadow buffer */
|
|
|
1148 p->single_buf = 1;
|
|
|
1149 }
|
|
|
1150
|
|
|
1151 /* TODO: p->free_bufs = 0 if use ngx_create_chain_of_bufs() */
|
|
|
1152 p->free_bufs = 1;
|
|
|
1153
|
|
|
1154 /*
|
|
|
1155 * event_pipe would do u->header_in.last += p->preread_size
|
|
|
1156 * as though these bytes were read
|
|
|
1157 */
|
|
|
1158 u->header_in.last = u->header_in.pos;
|
|
|
1159
|
|
|
1160 if (u->conf->cyclic_temp_file) {
|
|
|
1161
|
|
|
1162 /*
|
|
|
1163 * we need to disable the use of sendfile() if we use cyclic temp file
|
|
|
1164 * because the writing a new data may interfere with sendfile()
|
|
|
1165 * that uses the same kernel file pages (at least on FreeBSD)
|
|
|
1166 */
|
|
|
1167
|
|
|
1168 p->cyclic_temp_file = 1;
|
|
|
1169 r->connection->sendfile = 0;
|
|
|
1170
|
|
|
1171 } else {
|
|
|
1172 p->cyclic_temp_file = 0;
|
|
|
1173 }
|
|
|
1174
|
|
|
1175 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
1176
|
|
|
1177 p->read_timeout = u->conf->read_timeout;
|
|
|
1178 p->send_timeout = clcf->send_timeout;
|
|
|
1179 p->send_lowat = clcf->send_lowat;
|
|
|
1180
|
|
58
|
1181 u->peer.connection->read->handler = ngx_http_upstream_process_body;
|
|
|
1182 r->write_event_handler = ngx_http_upstream_process_downstream;
|
|
28
|
1183
|
|
|
1184 ngx_http_upstream_process_body(u->peer.connection->read);
|
|
|
1185 }
|
|
|
1186
|
|
|
1187
|
|
36
|
1188 static void
|
|
58
|
1189 ngx_http_upstream_process_downstream(ngx_http_request_t *r)
|
|
|
1190 {
|
|
|
1191 ngx_http_upstream_process_body(r->connection->write);
|
|
|
1192 }
|
|
|
1193
|
|
|
1194
|
|
|
1195 static void
|
|
36
|
1196 ngx_http_upstream_process_body(ngx_event_t *ev)
|
|
28
|
1197 {
|
|
58
|
1198 ngx_event_pipe_t *p;
|
|
28
|
1199 ngx_connection_t *c;
|
|
|
1200 ngx_http_request_t *r;
|
|
|
1201 ngx_http_upstream_t *u;
|
|
|
1202
|
|
|
1203 c = ev->data;
|
|
|
1204 r = c->data;
|
|
|
1205 u = r->upstream;
|
|
|
1206
|
|
|
1207 if (ev->write) {
|
|
32
|
1208 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1209 "http upstream process downstream");
|
|
|
1210 c->log->action = "sending to client";
|
|
28
|
1211
|
|
|
1212 } else {
|
|
32
|
1213 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1214 "http upstream process upstream");
|
|
|
1215 c->log->action = "reading upstream";
|
|
28
|
1216 }
|
|
|
1217
|
|
|
1218 p = &u->pipe;
|
|
|
1219
|
|
|
1220 if (ev->timedout) {
|
|
|
1221 if (ev->write) {
|
|
76
|
1222 if (ev->delayed) {
|
|
|
1223
|
|
|
1224 ev->timedout = 0;
|
|
|
1225 ev->delayed = 0;
|
|
|
1226
|
|
|
1227 if (!ev->ready) {
|
|
|
1228 ngx_add_timer(ev, p->send_timeout);
|
|
|
1229
|
|
|
1230 if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR)
|
|
|
1231 {
|
|
|
1232 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1233 return;
|
|
|
1234 }
|
|
|
1235
|
|
|
1236 return;
|
|
|
1237 }
|
|
|
1238
|
|
|
1239 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
|
|
1240 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1241 return;
|
|
|
1242 }
|
|
|
1243
|
|
|
1244 } else {
|
|
|
1245 p->downstream_error = 1;
|
|
|
1246 ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT,
|
|
|
1247 "client timed out");
|
|
|
1248 }
|
|
28
|
1249
|
|
|
1250 } else {
|
|
|
1251 p->upstream_error = 1;
|
|
|
1252 ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT,
|
|
|
1253 "upstream timed out");
|
|
|
1254 }
|
|
|
1255
|
|
|
1256 } else {
|
|
76
|
1257 if (ev->write && ev->delayed) {
|
|
|
1258 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1259 "http downstream delayed");
|
|
|
1260
|
|
|
1261 if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR) {
|
|
|
1262 return;
|
|
|
1263 }
|
|
|
1264
|
|
|
1265 return;
|
|
|
1266 }
|
|
|
1267
|
|
28
|
1268 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
|
|
1269 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1270 return;
|
|
|
1271 }
|
|
|
1272 }
|
|
|
1273
|
|
|
1274 if (u->peer.connection) {
|
|
|
1275
|
|
|
1276 #if (NGX_HTTP_FILE_CACHE)
|
|
|
1277
|
|
|
1278 if (p->upstream_done && u->cachable) {
|
|
|
1279 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
|
1280 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
1281 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1282 return;
|
|
|
1283 }
|
|
|
1284
|
|
|
1285 } else if (p->upstream_eof && u->cachable) {
|
|
|
1286
|
|
|
1287 /* TODO: check length & update cache */
|
|
|
1288
|
|
|
1289 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
|
1290 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
1291 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1292 return;
|
|
|
1293 }
|
|
|
1294 }
|
|
|
1295
|
|
|
1296 #endif
|
|
|
1297
|
|
|
1298 if (p->upstream_done || p->upstream_eof || p->upstream_error) {
|
|
32
|
1299 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1300 "http upstream exit: %p", p->out);
|
|
28
|
1301 #if 0
|
|
|
1302 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
1303 #endif
|
|
|
1304 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1305 return;
|
|
|
1306 }
|
|
|
1307 }
|
|
|
1308
|
|
|
1309 if (p->downstream_error) {
|
|
32
|
1310 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
1311 "http upstream downstream error");
|
|
28
|
1312
|
|
|
1313 if (!u->cachable && u->peer.connection) {
|
|
|
1314 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
1315 }
|
|
|
1316 }
|
|
|
1317 }
|
|
|
1318
|
|
|
1319
|
|
36
|
1320 static void
|
|
|
1321 ngx_http_upstream_dummy_handler(ngx_event_t *wev)
|
|
28
|
1322 {
|
|
|
1323 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
|
1324 "http upstream dummy handler");
|
|
|
1325 }
|
|
|
1326
|
|
|
1327
|
|
36
|
1328 static void
|
|
|
1329 ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
|
|
|
1330 ngx_uint_t ft_type)
|
|
28
|
1331 {
|
|
74
|
1332 ngx_uint_t status, down;
|
|
28
|
1333
|
|
|
1334 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1335 "http next upstream, %xD", ft_type);
|
|
|
1336
|
|
|
1337 #if 0
|
|
|
1338 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
1339 #endif
|
|
|
1340
|
|
74
|
1341 if (ft_type == NGX_HTTP_UPSTREAM_FT_HTTP_404) {
|
|
|
1342 down = 0;
|
|
|
1343 } else {
|
|
|
1344 down = 1;
|
|
28
|
1345 }
|
|
74
|
1346
|
|
|
1347 ngx_event_connect_peer_failed(&u->peer, down);
|
|
|
1348
|
|
28
|
1349 if (ft_type == NGX_HTTP_UPSTREAM_FT_TIMEOUT) {
|
|
|
1350 ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_ETIMEDOUT,
|
|
|
1351 "upstream timed out");
|
|
|
1352 }
|
|
|
1353
|
|
|
1354 if (u->peer.cached && ft_type == NGX_HTTP_UPSTREAM_FT_ERROR) {
|
|
|
1355 status = 0;
|
|
|
1356
|
|
|
1357 } else {
|
|
|
1358 switch(ft_type) {
|
|
|
1359
|
|
|
1360 case NGX_HTTP_UPSTREAM_FT_TIMEOUT:
|
|
|
1361 status = NGX_HTTP_GATEWAY_TIME_OUT;
|
|
|
1362 break;
|
|
|
1363
|
|
|
1364 case NGX_HTTP_UPSTREAM_FT_HTTP_500:
|
|
|
1365 status = NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
1366 break;
|
|
|
1367
|
|
|
1368 case NGX_HTTP_UPSTREAM_FT_HTTP_404:
|
|
|
1369 status = NGX_HTTP_NOT_FOUND;
|
|
|
1370 break;
|
|
|
1371
|
|
|
1372 /*
|
|
|
1373 * NGX_HTTP_UPSTREAM_FT_BUSY_LOCK and NGX_HTTP_UPSTREAM_FT_MAX_WAITING
|
|
|
1374 * never reach here
|
|
|
1375 */
|
|
|
1376
|
|
|
1377 default:
|
|
|
1378 status = NGX_HTTP_BAD_GATEWAY;
|
|
|
1379 }
|
|
|
1380 }
|
|
|
1381
|
|
|
1382 if (r->connection->write->eof) {
|
|
76
|
1383 r->connection->closed = 1;
|
|
28
|
1384 ngx_http_upstream_finalize_request(r, u,
|
|
|
1385 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
1386 return;
|
|
|
1387 }
|
|
|
1388
|
|
|
1389 if (status) {
|
|
|
1390 u->state->status = status;
|
|
|
1391
|
|
74
|
1392 if (u->peer.tries == 0 || !(u->conf->next_upstream & ft_type)) {
|
|
28
|
1393
|
|
|
1394 #if (NGX_HTTP_CACHE)
|
|
|
1395
|
|
|
1396 if (u->stale && (u->conf->use_stale & ft_type)) {
|
|
|
1397 ngx_http_upstream_finalize_request(r, u,
|
|
74
|
1398 ngx_http_send_cached_response(r));
|
|
28
|
1399 return;
|
|
|
1400 }
|
|
|
1401
|
|
|
1402 #endif
|
|
|
1403
|
|
|
1404 ngx_http_upstream_finalize_request(r, u, status);
|
|
|
1405 return;
|
|
|
1406 }
|
|
|
1407 }
|
|
|
1408
|
|
|
1409 if (u->peer.connection) {
|
|
|
1410 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1411 "close http upstream connection: %d",
|
|
|
1412 u->peer.connection->fd);
|
|
|
1413
|
|
|
1414 ngx_close_connection(u->peer.connection);
|
|
|
1415 }
|
|
|
1416
|
|
|
1417 #if 0
|
|
|
1418 if (u->conf->busy_lock && !u->busy_locked) {
|
|
|
1419 ngx_http_upstream_busy_lock(p);
|
|
|
1420 return;
|
|
|
1421 }
|
|
|
1422 #endif
|
|
|
1423
|
|
|
1424 ngx_http_upstream_connect(r, u);
|
|
|
1425 }
|
|
|
1426
|
|
|
1427
|
|
36
|
1428 static void
|
|
|
1429 ngx_http_upstream_finalize_request(ngx_http_request_t *r,
|
|
|
1430 ngx_http_upstream_t *u, ngx_int_t rc)
|
|
28
|
1431 {
|
|
112
|
1432 ngx_time_t *tp;
|
|
|
1433
|
|
32
|
1434 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1435 "finalize http upstream request: %i", rc);
|
|
28
|
1436
|
|
112
|
1437 if (u->state->response_time) {
|
|
|
1438 tp = ngx_timeofday();
|
|
|
1439 u->state->response_time = tp->sec * 1000 + tp->msec
|
|
|
1440 - u->state->response_time;
|
|
|
1441 }
|
|
|
1442
|
|
28
|
1443 u->finalize_request(r, rc);
|
|
|
1444
|
|
|
1445 if (u->peer.connection) {
|
|
|
1446 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1447 "close http upstream connection: %d",
|
|
|
1448 u->peer.connection->fd);
|
|
|
1449
|
|
|
1450 ngx_close_connection(u->peer.connection);
|
|
|
1451 }
|
|
|
1452
|
|
32
|
1453 u->peer.connection = NULL;
|
|
|
1454
|
|
112
|
1455 if (u->header_sent && (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE))
|
|
28
|
1456 {
|
|
|
1457 rc = 0;
|
|
|
1458 }
|
|
|
1459
|
|
30
|
1460 if (u->pipe.temp_file) {
|
|
28
|
1461 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1462 "http upstream temp fd: %d",
|
|
|
1463 u->pipe.temp_file->file.fd);
|
|
|
1464 }
|
|
|
1465
|
|
|
1466 #if 0
|
|
|
1467 if (u->cache) {
|
|
|
1468 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
32
|
1469 "http upstream cache fd: %d",
|
|
28
|
1470 u->cache->ctx.file.fd);
|
|
|
1471 }
|
|
|
1472 #endif
|
|
|
1473
|
|
58
|
1474 r->log_handler = u->saved_log_handler;
|
|
64
|
1475
|
|
|
1476 if (rc == NGX_DECLINED) {
|
|
|
1477 return;
|
|
|
1478 }
|
|
|
1479
|
|
32
|
1480 r->connection->log->action = "sending to client";
|
|
|
1481
|
|
102
|
1482 if (rc == 0 && r->main == r) {
|
|
28
|
1483 rc = ngx_http_send_last(r);
|
|
|
1484 }
|
|
|
1485
|
|
|
1486 ngx_http_finalize_request(r, rc);
|
|
|
1487 }
|
|
|
1488
|
|
|
1489
|
|
58
|
1490 static ngx_int_t
|
|
|
1491 ngx_http_upstream_process_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1492 ngx_uint_t offset)
|
|
|
1493 {
|
|
|
1494 ngx_table_elt_t **ph;
|
|
|
1495
|
|
|
1496 ph = (ngx_table_elt_t **) ((char *) &r->upstream->headers_in + offset);
|
|
|
1497
|
|
|
1498 if (*ph == NULL) {
|
|
|
1499 *ph = h;
|
|
|
1500 }
|
|
|
1501
|
|
|
1502 return NGX_OK;
|
|
|
1503 }
|
|
|
1504
|
|
|
1505
|
|
|
1506 static ngx_int_t
|
|
|
1507 ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
|
|
|
1508 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
|
1509 {
|
|
|
1510 ngx_array_t *pa;
|
|
|
1511 ngx_table_elt_t **ph;
|
|
|
1512
|
|
|
1513 pa = (ngx_array_t *) ((char *) &r->upstream->headers_in + offset);
|
|
|
1514
|
|
|
1515 if (pa->elts == NULL) {
|
|
|
1516 if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
|
|
|
1517 {
|
|
|
1518 return NGX_ERROR;
|
|
|
1519 }
|
|
|
1520 }
|
|
|
1521
|
|
|
1522 ph = ngx_array_push(pa);
|
|
|
1523 if (ph == NULL) {
|
|
|
1524 return NGX_ERROR;
|
|
|
1525 }
|
|
|
1526
|
|
|
1527 *ph = h;
|
|
|
1528
|
|
|
1529 return NGX_OK;
|
|
|
1530 }
|
|
|
1531
|
|
|
1532
|
|
|
1533 static ngx_int_t
|
|
|
1534 ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1535 ngx_uint_t offset)
|
|
|
1536 {
|
|
|
1537 return NGX_OK;
|
|
|
1538 }
|
|
|
1539
|
|
|
1540
|
|
|
1541 static ngx_int_t
|
|
76
|
1542 ngx_http_upstream_process_limit_rate(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1543 ngx_uint_t offset)
|
|
|
1544 {
|
|
|
1545 ngx_int_t n;
|
|
|
1546
|
|
|
1547 r->upstream->headers_in.x_accel_limit_rate = h;
|
|
|
1548
|
|
|
1549 n = ngx_atoi(h->value.data, h->value.len);
|
|
|
1550
|
|
|
1551 if (n != NGX_ERROR) {
|
|
|
1552 r->limit_rate = (size_t) n;
|
|
|
1553 }
|
|
|
1554
|
|
|
1555 return NGX_OK;
|
|
|
1556 }
|
|
|
1557
|
|
|
1558
|
|
|
1559 static ngx_int_t
|
|
58
|
1560 ngx_http_upstream_copy_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1561 ngx_uint_t offset)
|
|
|
1562 {
|
|
|
1563 ngx_table_elt_t *ho;
|
|
|
1564
|
|
|
1565 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1566 if (ho == NULL) {
|
|
|
1567 return NGX_ERROR;
|
|
|
1568 }
|
|
|
1569
|
|
|
1570 *ho = *h;
|
|
|
1571
|
|
|
1572 return NGX_OK;
|
|
|
1573 }
|
|
|
1574
|
|
|
1575
|
|
|
1576 static ngx_int_t
|
|
|
1577 ngx_http_upstream_conditional_copy_header_line(ngx_http_request_t *r,
|
|
|
1578 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
|
1579 {
|
|
|
1580 ngx_flag_t *f;
|
|
|
1581 ngx_table_elt_t *ho;
|
|
|
1582
|
|
|
1583 f = (ngx_flag_t *) ((char *) r->upstream->conf + offset);
|
|
|
1584
|
|
|
1585 if (*f == 0) {
|
|
|
1586 return NGX_OK;
|
|
|
1587 }
|
|
|
1588
|
|
|
1589 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1590 if (ho == NULL) {
|
|
|
1591 return NGX_ERROR;
|
|
|
1592 }
|
|
|
1593
|
|
|
1594 *ho = *h;
|
|
|
1595
|
|
|
1596 return NGX_OK;
|
|
|
1597 }
|
|
|
1598
|
|
|
1599
|
|
|
1600 static ngx_int_t
|
|
|
1601 ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r,
|
|
|
1602 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
|
1603 {
|
|
|
1604 ngx_array_t *pa;
|
|
|
1605 ngx_table_elt_t *ho, **ph;
|
|
|
1606
|
|
|
1607 pa = (ngx_array_t *) ((char *) &r->headers_out + offset);
|
|
|
1608
|
|
|
1609 if (pa->elts == NULL) {
|
|
|
1610 if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
|
|
|
1611 {
|
|
|
1612 return NGX_ERROR;
|
|
|
1613 }
|
|
|
1614 }
|
|
|
1615
|
|
|
1616 ph = ngx_array_push(pa);
|
|
|
1617 if (ph == NULL) {
|
|
|
1618 return NGX_ERROR;
|
|
|
1619 }
|
|
|
1620
|
|
|
1621 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1622 if (ho == NULL) {
|
|
|
1623 return NGX_ERROR;
|
|
|
1624 }
|
|
|
1625
|
|
|
1626 *ho = *h;
|
|
|
1627 *ph = ho;
|
|
|
1628
|
|
|
1629 return NGX_OK;
|
|
|
1630 }
|
|
|
1631
|
|
|
1632
|
|
|
1633 static ngx_int_t
|
|
|
1634 ngx_http_upstream_copy_content_type(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1635 ngx_uint_t offset)
|
|
|
1636 {
|
|
|
1637 r->headers_out.content_type = h->value;
|
|
|
1638
|
|
|
1639 return NGX_OK;
|
|
|
1640 }
|
|
|
1641
|
|
|
1642
|
|
|
1643 static ngx_int_t
|
|
|
1644 ngx_http_upstream_copy_content_length(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1645 ngx_uint_t offset)
|
|
|
1646 {
|
|
|
1647 ngx_table_elt_t *ho;
|
|
|
1648
|
|
|
1649 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1650 if (ho == NULL) {
|
|
|
1651 return NGX_ERROR;
|
|
|
1652 }
|
|
|
1653
|
|
|
1654 *ho = *h;
|
|
|
1655
|
|
|
1656 r->headers_out.content_length = ho;
|
|
|
1657 r->headers_out.content_length_n = ngx_atoof(h->value.data, h->value.len);
|
|
|
1658
|
|
|
1659 return NGX_OK;
|
|
|
1660 }
|
|
|
1661
|
|
|
1662
|
|
|
1663 static ngx_int_t
|
|
|
1664 ngx_http_upstream_rewrite_location(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1665 ngx_uint_t offset)
|
|
|
1666 {
|
|
|
1667 ngx_int_t rc;
|
|
|
1668 ngx_table_elt_t *ho;
|
|
|
1669
|
|
|
1670 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1671 if (ho == NULL) {
|
|
|
1672 return NGX_ERROR;
|
|
|
1673 }
|
|
|
1674
|
|
|
1675 *ho = *h;
|
|
|
1676
|
|
|
1677 if (r->upstream->rewrite_redirect) {
|
|
|
1678 rc = r->upstream->rewrite_redirect(r, ho, 0);
|
|
|
1679
|
|
78
|
1680 if (rc == NGX_DECLINED) {
|
|
|
1681 return NGX_OK;
|
|
|
1682 }
|
|
|
1683
|
|
58
|
1684 if (rc == NGX_OK) {
|
|
|
1685 r->headers_out.location = ho;
|
|
|
1686
|
|
|
1687 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1688 "rewritten location: \"%V\"", &ho->value);
|
|
|
1689 }
|
|
|
1690
|
|
|
1691 return rc;
|
|
|
1692 }
|
|
|
1693
|
|
|
1694 /*
|
|
|
1695 * we do not set r->headers_out.location here to avoid the handling
|
|
|
1696 * the local redirects without a host name by ngx_http_header_filter()
|
|
|
1697 */
|
|
|
1698
|
|
|
1699 return NGX_OK;
|
|
|
1700 }
|
|
|
1701
|
|
|
1702
|
|
|
1703 static ngx_int_t
|
|
|
1704 ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r, ngx_table_elt_t *h,
|
|
|
1705 ngx_uint_t offset)
|
|
|
1706 {
|
|
|
1707 u_char *p;
|
|
|
1708 ngx_int_t rc;
|
|
|
1709 ngx_table_elt_t *ho;
|
|
|
1710
|
|
|
1711 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1712 if (ho == NULL) {
|
|
|
1713 return NGX_ERROR;
|
|
|
1714 }
|
|
|
1715
|
|
|
1716 *ho = *h;
|
|
|
1717
|
|
|
1718 if (r->upstream->rewrite_redirect) {
|
|
|
1719
|
|
|
1720 p = (u_char *) ngx_strstr(ho->value.data, "url=");
|
|
|
1721
|
|
|
1722 if (p) {
|
|
|
1723 rc = r->upstream->rewrite_redirect(r, ho, p + 4 - ho->value.data);
|
|
|
1724
|
|
|
1725 } else {
|
|
|
1726 return NGX_OK;
|
|
|
1727 }
|
|
|
1728
|
|
78
|
1729 if (rc == NGX_DECLINED) {
|
|
|
1730 return NGX_OK;
|
|
|
1731 }
|
|
|
1732
|
|
58
|
1733 #if (NGX_DEBUG)
|
|
|
1734 if (rc == NGX_OK) {
|
|
|
1735 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1736 "rewritten refresh: \"%V\"", &ho->value);
|
|
|
1737 }
|
|
|
1738 #endif
|
|
|
1739
|
|
|
1740 return rc;
|
|
|
1741 }
|
|
|
1742
|
|
|
1743 return NGX_OK;
|
|
|
1744 }
|
|
|
1745
|
|
|
1746
|
|
|
1747 #if (NGX_HTTP_GZIP)
|
|
|
1748
|
|
|
1749 static ngx_int_t
|
|
|
1750 ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r,
|
|
|
1751 ngx_table_elt_t *h, ngx_uint_t offset)
|
|
|
1752 {
|
|
|
1753 ngx_table_elt_t *ho;
|
|
|
1754
|
|
|
1755 ho = ngx_list_push(&r->headers_out.headers);
|
|
|
1756 if (ho == NULL) {
|
|
|
1757 return NGX_ERROR;
|
|
|
1758 }
|
|
|
1759
|
|
|
1760 *ho = *h;
|
|
|
1761
|
|
|
1762 r->headers_out.content_encoding = ho;
|
|
|
1763
|
|
|
1764 return NGX_OK;
|
|
|
1765 }
|
|
|
1766
|
|
|
1767 #endif
|
|
|
1768
|
|
|
1769
|
|
36
|
1770 static size_t
|
|
|
1771 ngx_http_upstream_log_status_getlen(ngx_http_request_t *r, uintptr_t data)
|
|
28
|
1772 {
|
|
|
1773 if (r->upstream) {
|
|
|
1774 return r->upstream->states.nelts * (3 + 2);
|
|
|
1775 }
|
|
|
1776
|
|
|
1777 return 1;
|
|
|
1778 }
|
|
|
1779
|
|
|
1780
|
|
36
|
1781 static u_char *
|
|
|
1782 ngx_http_upstream_log_status(ngx_http_request_t *r, u_char *buf,
|
|
|
1783 ngx_http_log_op_t *op)
|
|
28
|
1784 {
|
|
|
1785 ngx_uint_t i;
|
|
|
1786 ngx_http_upstream_t *u;
|
|
|
1787 ngx_http_upstream_state_t *state;
|
|
|
1788
|
|
|
1789 u = r->upstream;
|
|
|
1790
|
|
|
1791 if (u == NULL) {
|
|
|
1792 *buf = '-';
|
|
|
1793 return buf + 1;
|
|
|
1794 }
|
|
|
1795
|
|
|
1796 i = 0;
|
|
|
1797 state = u->states.elts;
|
|
|
1798
|
|
|
1799 for ( ;; ) {
|
|
|
1800 if (state[i].status == 0) {
|
|
|
1801 *buf++ = '-';
|
|
|
1802
|
|
|
1803 } else {
|
|
|
1804 buf = ngx_sprintf(buf, "%ui", state[i].status);
|
|
|
1805 }
|
|
|
1806
|
|
|
1807 if (++i == u->states.nelts) {
|
|
|
1808 return buf;
|
|
|
1809 }
|
|
|
1810
|
|
|
1811 *buf++ = ',';
|
|
|
1812 *buf++ = ' ';
|
|
|
1813 }
|
|
|
1814 }
|
|
|
1815
|
|
|
1816
|
|
58
|
1817 static u_char *
|
|
112
|
1818 ngx_http_upstream_log_response_time(ngx_http_request_t *r, u_char *buf,
|
|
|
1819 ngx_http_log_op_t *op)
|
|
|
1820 {
|
|
|
1821 ngx_uint_t i;
|
|
|
1822 ngx_http_upstream_t *u;
|
|
|
1823 ngx_http_upstream_state_t *state;
|
|
|
1824
|
|
|
1825 u = r->upstream;
|
|
|
1826
|
|
|
1827 if (u == NULL) {
|
|
|
1828 *buf = '-';
|
|
|
1829 return buf + 1;
|
|
|
1830 }
|
|
|
1831
|
|
|
1832 i = 0;
|
|
|
1833 state = u->states.elts;
|
|
|
1834
|
|
|
1835 for ( ;; ) {
|
|
|
1836 if (state[i].status == 0) {
|
|
|
1837 *buf++ = '-';
|
|
|
1838
|
|
|
1839 } else {
|
|
|
1840 buf = ngx_sprintf(buf, "%d.%03d",
|
|
|
1841 state[i].response_time / 1000,
|
|
|
1842 state[i].response_time % 1000);
|
|
|
1843 }
|
|
|
1844
|
|
|
1845 if (++i == u->states.nelts) {
|
|
|
1846 return buf;
|
|
|
1847 }
|
|
|
1848
|
|
|
1849 *buf++ = ',';
|
|
|
1850 *buf++ = ' ';
|
|
|
1851 }
|
|
|
1852 }
|
|
|
1853
|
|
|
1854
|
|
|
1855 static u_char *
|
|
58
|
1856 ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf, size_t len)
|
|
28
|
1857 {
|
|
|
1858 u_char *p;
|
|
|
1859 ngx_http_upstream_t *u;
|
|
|
1860 ngx_peer_connection_t *peer;
|
|
|
1861
|
|
|
1862 u = r->upstream;
|
|
|
1863 peer = &u->peer;
|
|
|
1864
|
|
|
1865 p = ngx_snprintf(buf, len,
|
|
58
|
1866 ", server: %V, URL: \"%V\","
|
|
52
|
1867 " upstream: %V%V%s%V",
|
|
|
1868 &r->server_name,
|
|
28
|
1869 &r->unparsed_uri,
|
|
58
|
1870 &u->conf->schema,
|
|
28
|
1871 &peer->peers->peer[peer->cur_peer].name,
|
|
|
1872 peer->peers->peer[peer->cur_peer].uri_separator,
|
|
104
|
1873 &u->uri);
|
|
28
|
1874 len -= p - buf;
|
|
|
1875 buf = p;
|
|
|
1876
|
|
54
|
1877 return ngx_http_log_error_info(r, buf, len);
|
|
28
|
1878 }
|
|
|
1879
|
|
|
1880
|
|
36
|
1881 static ngx_int_t
|
|
|
1882 ngx_http_upstream_add_log_formats(ngx_conf_t *cf)
|
|
28
|
1883 {
|
|
|
1884 ngx_http_log_op_name_t *op;
|
|
|
1885
|
|
|
1886 for (op = ngx_http_upstream_log_fmt_ops; op->name.len; op++) { /* void */ }
|
|
|
1887 op->run = NULL;
|
|
|
1888
|
|
|
1889 for (op = ngx_http_log_fmt_ops; op->run; op++) {
|
|
|
1890 if (op->name.len == 0) {
|
|
|
1891 op = (ngx_http_log_op_name_t *) op->run;
|
|
|
1892 }
|
|
|
1893 }
|
|
|
1894
|
|
|
1895 op->run = (ngx_http_log_op_run_pt) ngx_http_upstream_log_fmt_ops;
|
|
|
1896
|
|
|
1897 return NGX_OK;
|
|
|
1898 }
|
|
58
|
1899
|
|
|
1900
|
|
|
1901 static void *
|
|
|
1902 ngx_http_upstream_create_main_conf(ngx_conf_t *cf)
|
|
|
1903 {
|
|
|
1904 ngx_http_upstream_main_conf_t *umcf;
|
|
|
1905
|
|
|
1906 umcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_main_conf_t));
|
|
|
1907 if (umcf == NULL) {
|
|
|
1908 return NULL;
|
|
|
1909 }
|
|
|
1910
|
|
|
1911 return umcf;
|
|
|
1912 }
|
|
|
1913
|
|
|
1914
|
|
|
1915 static char *
|
|
|
1916 ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf)
|
|
|
1917 {
|
|
|
1918 ngx_http_upstream_main_conf_t *umcf = conf;
|
|
|
1919
|
|
|
1920 umcf->headers_in_hash.max_size = 100;
|
|
|
1921 umcf->headers_in_hash.bucket_limit = 1;
|
|
|
1922 umcf->headers_in_hash.bucket_size = sizeof(ngx_http_upstream_header_t);
|
|
|
1923 umcf->headers_in_hash.name = "upstream_headers_in";
|
|
|
1924
|
|
|
1925 if (ngx_hash_init(&umcf->headers_in_hash, cf->pool,
|
|
|
1926 ngx_http_upstream_headers_in, 0) != NGX_OK)
|
|
|
1927 {
|
|
|
1928 return NGX_CONF_ERROR;
|
|
|
1929 }
|
|
|
1930
|
|
|
1931 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, cf->log, 0,
|
|
|
1932 "http upstream headers_in hash size: %ui, "
|
|
|
1933 "max buckets per entry: %ui",
|
|
|
1934 umcf->headers_in_hash.hash_size,
|
|
|
1935 umcf->headers_in_hash.min_buckets);
|
|
|
1936
|
|
|
1937 return NGX_CONF_OK;
|
|
|
1938 }
|
