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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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9 #include <ngx_http.h>
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10 #include <ngx_event_connect.h>
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11
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12
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13 static void ngx_http_upstream_check_broken_connection(ngx_event_t *ev);
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14 static void ngx_http_upstream_connect(ngx_http_request_t *r,
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15 ngx_http_upstream_t *u);
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16 static void ngx_http_upstream_reinit(ngx_http_request_t *r,
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17 ngx_http_upstream_t *u);
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18 static void ngx_http_upstream_send_request(ngx_http_request_t *r,
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19 ngx_http_upstream_t *u);
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20 static void ngx_http_upstream_send_request_handler(ngx_event_t *wev);
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21 static void ngx_http_upstream_process_header(ngx_event_t *rev);
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22 static void ngx_http_upstream_send_response(ngx_http_request_t *r,
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23 ngx_http_upstream_t *u);
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24 static void ngx_http_upstream_process_body(ngx_event_t *ev);
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25 static void ngx_http_upstream_dummy_handler(ngx_event_t *wev);
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26 static void ngx_http_upstream_next(ngx_http_request_t *r,
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27 ngx_http_upstream_t *u,
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28 ngx_uint_t ft_type);
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29 static void ngx_http_upstream_finalize_request(ngx_http_request_t *r,
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30 ngx_http_upstream_t *u,
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31 ngx_int_t rc);
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32
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33 static size_t ngx_http_upstream_log_status_getlen(ngx_http_request_t *r,
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34 uintptr_t data);
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35 static u_char *ngx_http_upstream_log_status(ngx_http_request_t *r, u_char *buf,
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36 ngx_http_log_op_t *op);
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37
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38
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39 static ngx_int_t ngx_http_upstream_add_log_formats(ngx_conf_t *cf);
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40
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41
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42 ngx_http_module_t ngx_http_upstream_module_ctx = {
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43 ngx_http_upstream_add_log_formats, /* pre conf */
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44
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45 NULL, /* create main configuration */
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46 NULL, /* init main configuration */
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47
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48 NULL, /* create server configuration */
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49 NULL, /* merge server configuration */
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50
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51 NULL, /* create location configuration */
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52 NULL /* merge location configuration */
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53 };
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54
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55
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56 ngx_module_t ngx_http_upstream_module = {
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57 NGX_MODULE,
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58 &ngx_http_upstream_module_ctx, /* module context */
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59 NULL, /* module directives */
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60 NGX_HTTP_MODULE, /* module type */
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61 NULL, /* init module */
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62 NULL /* init process */
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63 };
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64
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65
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66 static ngx_http_log_op_name_t ngx_http_upstream_log_fmt_ops[] = {
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67 { ngx_string("upstream_status"), 0, NULL,
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68 ngx_http_upstream_log_status_getlen,
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69 ngx_http_upstream_log_status },
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70 { ngx_null_string, 0, NULL, NULL, NULL }
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71 };
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72
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73
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74 char *ngx_http_upstream_header_errors[] = {
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75 "upstream sent invalid header",
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76 "upstream sent too long header line"
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77 };
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78
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79
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80 void ngx_http_upstream_init(ngx_http_request_t *r)
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81 {
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82 ngx_connection_t *c;
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83 ngx_http_upstream_t *u;
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84
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85 c = r->connection;
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86
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87 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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88 "http init upstream, client timer: %d", c->read->timer_set);
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89
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90 if (c->read->timer_set) {
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91 ngx_del_timer(c->read);
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92 }
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93
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94 c->read->event_handler = ngx_http_upstream_check_broken_connection;
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95
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96 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
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97
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98 c->write->event_handler = ngx_http_upstream_check_broken_connection;
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99
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100 if (!c->write->active) {
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101 if (ngx_add_event(c->write, NGX_WRITE_EVENT,
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102 NGX_CLEAR_EVENT) == NGX_ERROR)
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103 {
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104 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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105 return;
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106 }
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107 }
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108 }
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109
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110 u = r->upstream;
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111
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112 u->method = r->method;
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113
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114 if (u->create_request(r) == NGX_ERROR) {
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115 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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116 return;
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117 }
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118
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119 u->peer.log = r->connection->log;
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32
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120 u->saved_log_ctx = r->connection->log->data;
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121 u->saved_log_handler = r->connection->log->handler;
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28
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122 r->connection->log->data = u->log_ctx;
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123 r->connection->log->handler = u->log_handler;
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124
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125 u->output.sendfile = r->connection->sendfile;
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126 u->output.pool = r->pool;
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127 u->output.bufs.num = 1;
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128 u->output.output_filter = ngx_chain_writer;
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129 u->output.filter_ctx = &u->writer;
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130
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131 u->writer.pool = r->pool;
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132
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133 if (ngx_array_init(&u->states, r->pool, u->peer.peers->number,
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134 sizeof(ngx_http_upstream_state_t)) == NGX_ERROR)
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135 {
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136 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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137 return;
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138 }
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139
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140 if (!(u->state = ngx_push_array(&u->states))) {
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141 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
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142 return;
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143 }
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144
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145 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
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146
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147 ngx_http_upstream_connect(r, u);
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148 }
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149
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150
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151 static void ngx_http_upstream_check_broken_connection(ngx_event_t *ev)
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152 {
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153 int n;
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154 char buf[1];
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155 ngx_err_t err;
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156 ngx_connection_t *c;
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157 ngx_http_request_t *r;
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158 ngx_http_upstream_t *u;
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159
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160 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ev->log, 0,
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161 "http upstream check client, write event:%d", ev->write);
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162
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32
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163 c = ev->data;
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164 r = c->data;
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165 u = r->upstream;
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166
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167 if (u->peer.connection == NULL) {
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168 return;
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169 }
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170
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28
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171 #if (NGX_HAVE_KQUEUE)
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172
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173 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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174
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175 if (!ev->pending_eof) {
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176 return;
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177 }
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178
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179 ev->eof = 1;
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180
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181 if (ev->kq_errno) {
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182 ev->error = 1;
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183 }
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184
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185 if (!u->cachable && u->peer.connection) {
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186 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
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187 "kevent() reported that client closed "
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188 "prematurely connection, "
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189 "so upstream connection is closed too");
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190 ngx_http_upstream_finalize_request(r, u,
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191 NGX_HTTP_CLIENT_CLOSED_REQUEST);
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192 return;
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193 }
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194
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195 ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno,
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196 "kevent() reported that client closed "
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197 "prematurely connection");
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198
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199 if (u->peer.connection == NULL) {
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200 ngx_http_upstream_finalize_request(r, u,
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201 NGX_HTTP_CLIENT_CLOSED_REQUEST);
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202 return;
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203 }
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204
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205 return;
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206 }
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207
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208 #endif
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209
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210 n = recv(c->fd, buf, 1, MSG_PEEK);
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211
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212 err = ngx_socket_errno;
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213
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214 /*
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215 * we do not need to disable the write event because
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216 * that event has NGX_USE_CLEAR_EVENT type
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217 */
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218
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219 if (ev->write && (n >= 0 || err == NGX_EAGAIN)) {
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220 return;
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221 }
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222
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223 if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && ev->active) {
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224 if (ngx_del_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) {
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225 ngx_http_upstream_finalize_request(r, u,
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226 NGX_HTTP_INTERNAL_SERVER_ERROR);
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227 return;
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228 }
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229 }
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230
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231 if (n > 0) {
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232 return;
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233 }
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234
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235 ev->eof = 1;
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236
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237 if (n == -1) {
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238 if (err == NGX_EAGAIN) {
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239 return;
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240 }
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241
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242 ev->error = 1;
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243
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32
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244 } else { /* n == 0 */
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28
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245 err = 0;
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246 }
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247
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248 if (!u->cachable && u->peer.connection) {
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249 ngx_log_error(NGX_LOG_INFO, ev->log, err,
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250 "client closed prematurely connection, "
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251 "so upstream connection is closed too");
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252 ngx_http_upstream_finalize_request(r, u,
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253 NGX_HTTP_CLIENT_CLOSED_REQUEST);
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254 return;
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255 }
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256
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257 ngx_log_error(NGX_LOG_INFO, ev->log, err,
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258 "client closed prematurely connection");
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259
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260 if (u->peer.connection == NULL) {
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261 ngx_http_upstream_finalize_request(r, u,
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262 NGX_HTTP_CLIENT_CLOSED_REQUEST);
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263 return;
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264 }
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265 }
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266
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267
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268 static void ngx_http_upstream_connect(ngx_http_request_t *r,
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269 ngx_http_upstream_t *u)
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270 {
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271 ngx_int_t rc;
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272 ngx_connection_t *c;
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273
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32
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274 r->connection->log->action = "connecting to upstream";
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28
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275
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276 r->connection->single_connection = 0;
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277
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278 rc = ngx_event_connect_peer(&u->peer);
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279
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280 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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281 "http upstream connect: %i", rc);
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282
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283 if (rc == NGX_ERROR) {
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284 ngx_http_upstream_finalize_request(r, u,
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285 NGX_HTTP_INTERNAL_SERVER_ERROR);
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286 return;
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287 }
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288
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289 u->state->peer = &u->peer.peers->peer[u->peer.cur_peer].name;
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290
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291 if (rc == NGX_CONNECT_ERROR) {
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292 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
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293 return;
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294 }
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295
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296 c = u->peer.connection;
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297
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298 c->data = r;
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299 c->write->event_handler = ngx_http_upstream_send_request_handler;
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300 c->read->event_handler = ngx_http_upstream_process_header;
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301
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302 c->sendfile = r->connection->sendfile;
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303
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304 c->pool = r->pool;
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305 c->read->log = c->write->log = c->log = r->connection->log;
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306
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307 /* init or reinit the ngx_output_chain() and ngx_chain_writer() contexts */
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308
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309 u->writer.out = NULL;
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310 u->writer.last = &u->writer.out;
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311 u->writer.connection = c;
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312 u->writer.limit = 0;
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313
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314 if (u->request_sent) {
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315 ngx_http_upstream_reinit(r, u);
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316 }
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317
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318 if (r->request_body->buf) {
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319 if (r->request_body->temp_file) {
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320
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321 if (!(u->output.free = ngx_alloc_chain_link(r->pool))) {
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322 ngx_http_upstream_finalize_request(r, u,
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323 NGX_HTTP_INTERNAL_SERVER_ERROR);
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324 return;
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325 }
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326
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327 u->output.free->buf = r->request_body->buf;
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328 u->output.free->next = NULL;
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329 u->output.allocated = 1;
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330
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331 r->request_body->buf->pos = r->request_body->buf->start;
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332 r->request_body->buf->last = r->request_body->buf->start;
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333 r->request_body->buf->tag = u->output.tag;
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334
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335 } else {
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336 r->request_body->buf->pos = r->request_body->buf->start;
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337 }
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338 }
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339
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340 u->request_sent = 0;
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341
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342 if (rc == NGX_AGAIN) {
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343 ngx_add_timer(c->write, u->conf->connect_timeout);
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344 return;
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345 }
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346
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347 /* rc == NGX_OK */
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348
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349 ngx_http_upstream_send_request(r, u);
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350 }
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351
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352
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353 static void ngx_http_upstream_reinit(ngx_http_request_t *r,
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354 ngx_http_upstream_t *u)
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355 {
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356 ngx_chain_t *cl;
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357
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358 if (u->reinit_request(r) == NGX_ERROR) {
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359 ngx_http_upstream_finalize_request(r, u,
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360 NGX_HTTP_INTERNAL_SERVER_ERROR);
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361 return;
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362 }
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363
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364 /* reinit the request chain */
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365
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366 for (cl = r->request_body->bufs; cl; cl = cl->next) {
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367 cl->buf->pos = cl->buf->start;
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368 cl->buf->file_pos = 0;
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369 }
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370
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371 /* reinit the ngx_output_chain() context */
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372
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373 u->output.buf = NULL;
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374 u->output.in = NULL;
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375 u->output.free = NULL;
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376 u->output.busy = NULL;
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377
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378 /* reinit u->header_in buffer */
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379
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380 #if 0
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381 if (u->cache) {
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382 u->header_in.pos = u->header_in.start + u->cache->ctx.header_size;
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383 u->header_in.last = u->header_in.pos;
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384
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385 } else {
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386 u->header_in.pos = u->header_in.start;
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387 u->header_in.last = u->header_in.start;
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388 }
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389 #else
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390 u->header_in.pos = u->header_in.start;
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391 u->header_in.last = u->header_in.start;
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392 #endif
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393
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394 /* add one more state */
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395
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396 if (!(u->state = ngx_push_array(&u->states))) {
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397 ngx_http_upstream_finalize_request(r, u,
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398 NGX_HTTP_INTERNAL_SERVER_ERROR);
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399 return;
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400 }
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401
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402 ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t));
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403
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404 u->status = 0;
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405 u->status_count = 0;
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406 }
|
|
|
407
|
|
|
408
|
|
|
409 static void ngx_http_upstream_send_request(ngx_http_request_t *r,
|
|
|
410 ngx_http_upstream_t *u)
|
|
|
411 {
|
|
32
|
412 int rc;
|
|
|
413 ngx_connection_t *c;
|
|
28
|
414
|
|
|
415 c = u->peer.connection;
|
|
|
416
|
|
|
417 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
418 "http upstream send request");
|
|
|
419
|
|
|
420 #if (NGX_HAVE_KQUEUE)
|
|
|
421
|
|
|
422 if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT)
|
|
|
423 && !u->request_sent
|
|
|
424 && c->write->pending_eof)
|
|
|
425 {
|
|
|
426 ngx_log_error(NGX_LOG_ERR, c->log, c->write->kq_errno,
|
|
|
427 "connect() failed");
|
|
|
428
|
|
|
429 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
430 return;
|
|
|
431 }
|
|
|
432
|
|
|
433 #endif
|
|
|
434
|
|
32
|
435 c->log->action = "sending request to upstream";
|
|
28
|
436
|
|
|
437 rc = ngx_output_chain(&u->output,
|
|
|
438 u->request_sent ? NULL : r->request_body->bufs);
|
|
|
439
|
|
|
440 u->request_sent = 1;
|
|
|
441
|
|
|
442 if (rc == NGX_ERROR) {
|
|
|
443 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
444 return;
|
|
|
445 }
|
|
|
446
|
|
|
447 if (c->write->timer_set) {
|
|
|
448 ngx_del_timer(c->write);
|
|
|
449 }
|
|
|
450
|
|
|
451 if (rc == NGX_AGAIN) {
|
|
|
452 ngx_add_timer(c->write, u->conf->send_timeout);
|
|
|
453
|
|
|
454 if (ngx_handle_write_event(c->write, u->conf->send_lowat) == NGX_ERROR)
|
|
|
455 {
|
|
|
456 ngx_http_upstream_finalize_request(r, u,
|
|
|
457 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
458 return;
|
|
|
459 }
|
|
|
460
|
|
|
461 return;
|
|
|
462 }
|
|
|
463
|
|
|
464 /* rc == NGX_OK */
|
|
|
465
|
|
|
466 if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) {
|
|
|
467 if (ngx_tcp_push(c->fd) == NGX_ERROR) {
|
|
|
468 ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno,
|
|
|
469 ngx_tcp_push_n " failed");
|
|
|
470 ngx_http_upstream_finalize_request(r, u,
|
|
|
471 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
472 return;
|
|
|
473 }
|
|
|
474
|
|
|
475 c->tcp_nopush = NGX_TCP_NOPUSH_UNSET;
|
|
|
476 return;
|
|
|
477 }
|
|
|
478
|
|
|
479 ngx_add_timer(c->read, u->conf->read_timeout);
|
|
|
480
|
|
|
481 #if 1
|
|
|
482 if (c->read->ready) {
|
|
|
483
|
|
|
484 /* post aio operation */
|
|
|
485
|
|
|
486 /*
|
|
|
487 * TODO comment
|
|
|
488 * although we can post aio operation just in the end
|
|
|
489 * of ngx_http_upstream_connect() CHECK IT !!!
|
|
|
490 * it's better to do here because we postpone header buffer allocation
|
|
|
491 */
|
|
|
492
|
|
|
493 ngx_http_upstream_process_header(c->read);
|
|
|
494 return;
|
|
|
495 }
|
|
|
496 #endif
|
|
|
497
|
|
|
498 c->write->event_handler = ngx_http_upstream_dummy_handler;
|
|
|
499
|
|
|
500 if (ngx_handle_level_write_event(c->write) == NGX_ERROR) {
|
|
|
501 ngx_http_upstream_finalize_request(r, u,
|
|
|
502 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
503 return;
|
|
|
504 }
|
|
|
505 }
|
|
|
506
|
|
|
507
|
|
|
508 static void ngx_http_upstream_send_request_handler(ngx_event_t *wev)
|
|
|
509 {
|
|
|
510 ngx_connection_t *c;
|
|
|
511 ngx_http_request_t *r;
|
|
|
512 ngx_http_upstream_t *u;
|
|
|
513
|
|
|
514 c = wev->data;
|
|
|
515 r = c->data;
|
|
|
516 u = r->upstream;
|
|
|
517
|
|
|
518 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
|
519 "http upstream send request handler");
|
|
|
520
|
|
|
521 if (wev->timedout) {
|
|
32
|
522 c->log->action = "sending request to upstream";
|
|
28
|
523 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
|
524 return;
|
|
|
525 }
|
|
|
526
|
|
|
527 if (r->connection->write->eof && (!u->cachable || !u->request_sent)) {
|
|
|
528 ngx_http_upstream_finalize_request(r, u,
|
|
|
529 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
530 return;
|
|
|
531 }
|
|
|
532
|
|
|
533 ngx_http_upstream_send_request(r, u);
|
|
|
534 }
|
|
|
535
|
|
|
536
|
|
|
537 static void ngx_http_upstream_process_header(ngx_event_t *rev)
|
|
|
538 {
|
|
|
539 ssize_t n;
|
|
|
540 ngx_int_t rc;
|
|
|
541 ngx_connection_t *c;
|
|
|
542 ngx_http_request_t *r;
|
|
|
543 ngx_http_upstream_t *u;
|
|
|
544
|
|
|
545 c = rev->data;
|
|
|
546 r = c->data;
|
|
|
547 u = r->upstream;
|
|
|
548
|
|
|
549 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
|
|
32
|
550 "http upstream process header");
|
|
28
|
551
|
|
32
|
552 c->log->action = "reading response header from upstream";
|
|
28
|
553
|
|
|
554 if (rev->timedout) {
|
|
|
555 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT);
|
|
|
556 return;
|
|
|
557 }
|
|
|
558
|
|
|
559 if (u->header_in.start == NULL) {
|
|
|
560 u->header_in.start = ngx_palloc(r->pool, u->conf->header_buffer_size);
|
|
|
561 if (u->header_in.start == NULL) {
|
|
|
562 ngx_http_upstream_finalize_request(r, u,
|
|
|
563 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
564 return;
|
|
|
565 }
|
|
|
566
|
|
|
567 u->header_in.pos = u->header_in.start;
|
|
|
568 u->header_in.last = u->header_in.start;
|
|
32
|
569 u->header_in.end = u->header_in.start + u->conf->header_buffer_size;
|
|
28
|
570 u->header_in.temporary = 1;
|
|
|
571
|
|
|
572 u->header_in.tag = u->output.tag;
|
|
|
573
|
|
|
574 #if 0
|
|
|
575 if (u->cache) {
|
|
|
576 u->header_in.pos += u->cache->ctx.header_size;
|
|
|
577 u->header_in.last = u->header_in.pos;
|
|
|
578 }
|
|
|
579 #endif
|
|
|
580 }
|
|
|
581
|
|
|
582 n = ngx_recv(u->peer.connection, u->header_in.last,
|
|
|
583 u->header_in.end - u->header_in.last);
|
|
|
584
|
|
|
585 if (n == NGX_AGAIN) {
|
|
|
586 #if 0
|
|
|
587 ngx_add_timer(rev, u->read_timeout);
|
|
|
588 #endif
|
|
|
589
|
|
|
590 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
591 ngx_http_upstream_finalize_request(r, u,
|
|
|
592 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
593 return;
|
|
|
594 }
|
|
|
595
|
|
|
596 return;
|
|
|
597 }
|
|
|
598
|
|
|
599 if (n == 0) {
|
|
|
600 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
|
601 "upstream prematurely closed connection");
|
|
|
602 }
|
|
|
603
|
|
|
604 if (n == NGX_ERROR || n == 0) {
|
|
|
605 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
|
|
|
606 return;
|
|
|
607 }
|
|
|
608
|
|
|
609 if (n == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
|
610 ngx_http_upstream_finalize_request(r, u,
|
|
|
611 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
612 return;
|
|
|
613 }
|
|
|
614
|
|
|
615 u->header_in.last += n;
|
|
|
616
|
|
|
617 #if 0
|
|
|
618 u->valid_header_in = 0;
|
|
|
619
|
|
|
620 u->peer.cached = 0;
|
|
|
621 #endif
|
|
|
622
|
|
|
623 rc = u->process_header(r);
|
|
|
624
|
|
|
625 if (rc == NGX_AGAIN) {
|
|
|
626 #if 0
|
|
|
627 ngx_add_timer(rev, u->read_timeout);
|
|
|
628 #endif
|
|
|
629
|
|
|
630 if (u->header_in.last == u->header_in.end) {
|
|
|
631 ngx_log_error(NGX_LOG_ERR, rev->log, 0,
|
|
|
632 "upstream sent too big header");
|
|
|
633
|
|
|
634 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
|
635 return;
|
|
|
636 }
|
|
|
637
|
|
|
638 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
639 ngx_http_upstream_finalize_request(r, u,
|
|
|
640 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
641 return;
|
|
|
642 }
|
|
|
643
|
|
|
644 return;
|
|
|
645 }
|
|
|
646
|
|
|
647 if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) {
|
|
|
648 ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER);
|
|
|
649 return;
|
|
|
650 }
|
|
|
651
|
|
|
652 if (rc == NGX_ERROR || rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
|
653 ngx_http_upstream_finalize_request(r, u,
|
|
|
654 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
655 return;
|
|
|
656 }
|
|
|
657
|
|
|
658 /* rc == NGX_OK */
|
|
|
659
|
|
|
660 ngx_http_upstream_send_response(r, u);
|
|
|
661 }
|
|
|
662
|
|
|
663
|
|
|
664 static void ngx_http_upstream_send_response(ngx_http_request_t *r,
|
|
|
665 ngx_http_upstream_t *u)
|
|
|
666 {
|
|
|
667 ngx_event_pipe_t *p;
|
|
|
668 ngx_http_core_loc_conf_t *clcf;
|
|
|
669
|
|
|
670
|
|
|
671 if (u->send_header(r) == NGX_HTTP_INTERNAL_SERVER_ERROR) {
|
|
|
672 ngx_http_upstream_finalize_request(r, u,
|
|
|
673 NGX_HTTP_INTERNAL_SERVER_ERROR);
|
|
|
674 return;
|
|
|
675 }
|
|
|
676
|
|
|
677 u->header_sent = 1;
|
|
|
678
|
|
|
679 /* TODO: preallocate event_pipe bufs, look "Content-Length" */
|
|
|
680
|
|
|
681 #if 0
|
|
|
682
|
|
|
683 if (u->cache && u->cache->ctx.file.fd != NGX_INVALID_FILE) {
|
|
|
684 if (ngx_close_file(u->cache->ctx.file.fd) == NGX_FILE_ERROR) {
|
|
|
685 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
|
|
|
686 ngx_close_file_n " \"%s\" failed",
|
|
|
687 u->cache->ctx.file.name.data);
|
|
|
688 }
|
|
|
689 }
|
|
|
690
|
|
|
691 if (u->cachable) {
|
|
|
692 header = (ngx_http_cache_header_t *) u->header_in->start;
|
|
|
693
|
|
|
694 header->expires = u->cache->ctx.expires;
|
|
|
695 header->last_modified = u->cache->ctx.last_modified;
|
|
|
696 header->date = u->cache->ctx.date;
|
|
|
697 header->length = r->headers_out.content_length_n;
|
|
|
698 u->cache->ctx.length = r->headers_out.content_length_n;
|
|
|
699
|
|
|
700 header->key_len = u->cache->ctx.key0.len;
|
|
|
701 ngx_memcpy(&header->key, u->cache->ctx.key0.data, header->key_len);
|
|
|
702 header->key[header->key_len] = LF;
|
|
|
703 }
|
|
|
704
|
|
|
705 #endif
|
|
|
706
|
|
|
707 p = &u->pipe;
|
|
|
708
|
|
|
709 p->output_filter = (ngx_event_pipe_output_filter_pt) ngx_http_output_filter;
|
|
|
710 p->output_ctx = r;
|
|
|
711 p->tag = u->output.tag;
|
|
|
712 p->bufs = u->conf->bufs;
|
|
|
713 p->busy_size = u->conf->busy_buffers_size;
|
|
|
714 p->upstream = u->peer.connection;
|
|
|
715 p->downstream = r->connection;
|
|
|
716 p->pool = r->pool;
|
|
|
717 p->log = r->connection->log;
|
|
|
718
|
|
|
719 p->cachable = u->cachable;
|
|
|
720
|
|
|
721 if (!(p->temp_file = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)))) {
|
|
|
722 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
723 return;
|
|
|
724 }
|
|
|
725
|
|
|
726 p->temp_file->file.fd = NGX_INVALID_FILE;
|
|
|
727 p->temp_file->file.log = r->connection->log;
|
|
|
728 p->temp_file->path = u->conf->temp_path;
|
|
|
729 p->temp_file->pool = r->pool;
|
|
|
730
|
|
|
731 if (u->cachable) {
|
|
|
732 p->temp_file->persistent = 1;
|
|
|
733 } else {
|
|
|
734 p->temp_file->warn = "an upstream response is buffered "
|
|
|
735 "to a temporary file";
|
|
|
736 }
|
|
|
737
|
|
|
738 p->max_temp_file_size = u->conf->max_temp_file_size;
|
|
|
739 p->temp_file_write_size = u->conf->temp_file_write_size;
|
|
|
740
|
|
|
741 if (!(p->preread_bufs = ngx_alloc_chain_link(r->pool))) {
|
|
|
742 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
743 return;
|
|
|
744 }
|
|
|
745 p->preread_bufs->buf = &u->header_in;
|
|
|
746 p->preread_bufs->next = NULL;
|
|
|
747 u->header_in.recycled = 1;
|
|
|
748
|
|
|
749 p->preread_size = u->header_in.last - u->header_in.pos;
|
|
|
750
|
|
|
751 if (u->cachable) {
|
|
|
752 p->buf_to_file = ngx_calloc_buf(r->pool);
|
|
|
753 if (p->buf_to_file == NULL) {
|
|
|
754 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
755 return;
|
|
|
756 }
|
|
|
757 p->buf_to_file->pos = u->header_in.start;
|
|
|
758 p->buf_to_file->last = u->header_in.pos;
|
|
|
759 p->buf_to_file->temporary = 1;
|
|
|
760 }
|
|
|
761
|
|
|
762 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
|
|
|
763 /* the posted aio operation may currupt a shadow buffer */
|
|
|
764 p->single_buf = 1;
|
|
|
765 }
|
|
|
766
|
|
|
767 /* TODO: p->free_bufs = 0 if use ngx_create_chain_of_bufs() */
|
|
|
768 p->free_bufs = 1;
|
|
|
769
|
|
|
770 /*
|
|
|
771 * event_pipe would do u->header_in.last += p->preread_size
|
|
|
772 * as though these bytes were read
|
|
|
773 */
|
|
|
774 u->header_in.last = u->header_in.pos;
|
|
|
775
|
|
|
776 if (u->conf->cyclic_temp_file) {
|
|
|
777
|
|
|
778 /*
|
|
|
779 * we need to disable the use of sendfile() if we use cyclic temp file
|
|
|
780 * because the writing a new data may interfere with sendfile()
|
|
|
781 * that uses the same kernel file pages (at least on FreeBSD)
|
|
|
782 */
|
|
|
783
|
|
|
784 p->cyclic_temp_file = 1;
|
|
|
785 r->connection->sendfile = 0;
|
|
|
786
|
|
|
787 } else {
|
|
|
788 p->cyclic_temp_file = 0;
|
|
|
789 }
|
|
|
790
|
|
|
791 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
792
|
|
|
793 p->read_timeout = u->conf->read_timeout;
|
|
|
794 p->send_timeout = clcf->send_timeout;
|
|
|
795 p->send_lowat = clcf->send_lowat;
|
|
|
796
|
|
|
797 u->peer.connection->read->event_handler = ngx_http_upstream_process_body;
|
|
|
798 r->connection->write->event_handler = ngx_http_upstream_process_body;
|
|
|
799
|
|
|
800 ngx_http_upstream_process_body(u->peer.connection->read);
|
|
|
801 }
|
|
|
802
|
|
|
803
|
|
|
804 static void ngx_http_upstream_process_body(ngx_event_t *ev)
|
|
|
805 {
|
|
|
806 ngx_connection_t *c;
|
|
|
807 ngx_http_request_t *r;
|
|
|
808 ngx_http_upstream_t *u;
|
|
|
809 ngx_event_pipe_t *p;
|
|
|
810
|
|
|
811 c = ev->data;
|
|
|
812 r = c->data;
|
|
|
813 u = r->upstream;
|
|
|
814
|
|
|
815 if (ev->write) {
|
|
32
|
816 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
817 "http upstream process downstream");
|
|
|
818 c->log->action = "sending to client";
|
|
28
|
819
|
|
|
820 } else {
|
|
32
|
821 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
822 "http upstream process upstream");
|
|
|
823 c->log->action = "reading upstream";
|
|
28
|
824 }
|
|
|
825
|
|
|
826 p = &u->pipe;
|
|
|
827
|
|
|
828 if (ev->timedout) {
|
|
|
829 if (ev->write) {
|
|
|
830 p->downstream_error = 1;
|
|
|
831 ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT,
|
|
|
832 "client timed out");
|
|
|
833
|
|
|
834 } else {
|
|
|
835 p->upstream_error = 1;
|
|
|
836 ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT,
|
|
|
837 "upstream timed out");
|
|
|
838 }
|
|
|
839
|
|
|
840 } else {
|
|
|
841 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
|
|
|
842 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
843 return;
|
|
|
844 }
|
|
|
845 }
|
|
|
846
|
|
|
847 if (u->peer.connection) {
|
|
|
848
|
|
|
849 #if (NGX_HTTP_FILE_CACHE)
|
|
|
850
|
|
|
851 if (p->upstream_done && u->cachable) {
|
|
|
852 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
|
853 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
854 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
855 return;
|
|
|
856 }
|
|
|
857
|
|
|
858 } else if (p->upstream_eof && u->cachable) {
|
|
|
859
|
|
|
860 /* TODO: check length & update cache */
|
|
|
861
|
|
|
862 if (ngx_http_cache_update(r) == NGX_ERROR) {
|
|
|
863 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
864 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
865 return;
|
|
|
866 }
|
|
|
867 }
|
|
|
868
|
|
|
869 #endif
|
|
|
870
|
|
|
871 if (p->upstream_done || p->upstream_eof || p->upstream_error) {
|
|
32
|
872 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
873 "http upstream exit: %p", p->out);
|
|
28
|
874 #if 0
|
|
|
875 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
876 #endif
|
|
|
877 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
878 return;
|
|
|
879 }
|
|
|
880 }
|
|
|
881
|
|
|
882 if (p->downstream_error) {
|
|
32
|
883 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
|
|
|
884 "http upstream downstream error");
|
|
28
|
885
|
|
|
886 if (!u->cachable && u->peer.connection) {
|
|
|
887 ngx_http_upstream_finalize_request(r, u, 0);
|
|
|
888 }
|
|
|
889 }
|
|
|
890 }
|
|
|
891
|
|
|
892
|
|
|
893 static void ngx_http_upstream_dummy_handler(ngx_event_t *wev)
|
|
|
894 {
|
|
|
895 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
|
|
|
896 "http upstream dummy handler");
|
|
|
897 }
|
|
|
898
|
|
|
899
|
|
|
900 static void ngx_http_upstream_next(ngx_http_request_t *r,
|
|
|
901 ngx_http_upstream_t *u,
|
|
|
902 ngx_uint_t ft_type)
|
|
|
903 {
|
|
|
904 ngx_uint_t status;
|
|
|
905
|
|
|
906 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
907 "http next upstream, %xD", ft_type);
|
|
|
908
|
|
|
909 #if 0
|
|
|
910 ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock);
|
|
|
911 #endif
|
|
|
912
|
|
|
913 if (ft_type != NGX_HTTP_UPSTREAM_FT_HTTP_404) {
|
|
|
914 ngx_event_connect_peer_failed(&u->peer);
|
|
|
915 }
|
|
|
916
|
|
|
917 if (ft_type == NGX_HTTP_UPSTREAM_FT_TIMEOUT) {
|
|
|
918 ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_ETIMEDOUT,
|
|
|
919 "upstream timed out");
|
|
|
920 }
|
|
|
921
|
|
|
922 if (u->peer.cached && ft_type == NGX_HTTP_UPSTREAM_FT_ERROR) {
|
|
|
923 status = 0;
|
|
|
924
|
|
|
925 } else {
|
|
|
926 switch(ft_type) {
|
|
|
927
|
|
|
928 case NGX_HTTP_UPSTREAM_FT_TIMEOUT:
|
|
|
929 status = NGX_HTTP_GATEWAY_TIME_OUT;
|
|
|
930 break;
|
|
|
931
|
|
|
932 case NGX_HTTP_UPSTREAM_FT_HTTP_500:
|
|
|
933 status = NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
934 break;
|
|
|
935
|
|
|
936 case NGX_HTTP_UPSTREAM_FT_HTTP_404:
|
|
|
937 status = NGX_HTTP_NOT_FOUND;
|
|
|
938 break;
|
|
|
939
|
|
|
940 /*
|
|
|
941 * NGX_HTTP_UPSTREAM_FT_BUSY_LOCK and NGX_HTTP_UPSTREAM_FT_MAX_WAITING
|
|
|
942 * never reach here
|
|
|
943 */
|
|
|
944
|
|
|
945 default:
|
|
|
946 status = NGX_HTTP_BAD_GATEWAY;
|
|
|
947 }
|
|
|
948 }
|
|
|
949
|
|
|
950 if (r->connection->write->eof) {
|
|
|
951 ngx_http_upstream_finalize_request(r, u,
|
|
|
952 NGX_HTTP_CLIENT_CLOSED_REQUEST);
|
|
|
953 return;
|
|
|
954 }
|
|
|
955
|
|
|
956 if (status) {
|
|
|
957 u->state->status = status;
|
|
|
958
|
|
|
959 if (u->peer.tries == 0 || !(u->conf->next_upstream & ft_type))
|
|
|
960 {
|
|
|
961
|
|
|
962 #if (NGX_HTTP_CACHE)
|
|
|
963
|
|
|
964 if (u->stale && (u->conf->use_stale & ft_type)) {
|
|
|
965 ngx_http_upstream_finalize_request(r, u,
|
|
32
|
966 ngx_http_send_cached_response(r));
|
|
28
|
967 return;
|
|
|
968 }
|
|
|
969
|
|
|
970 #endif
|
|
|
971
|
|
|
972 ngx_http_upstream_finalize_request(r, u, status);
|
|
|
973 return;
|
|
|
974 }
|
|
|
975 }
|
|
|
976
|
|
|
977 if (u->peer.connection) {
|
|
|
978 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
979 "close http upstream connection: %d",
|
|
|
980 u->peer.connection->fd);
|
|
|
981
|
|
|
982 ngx_close_connection(u->peer.connection);
|
|
|
983 }
|
|
|
984
|
|
|
985 #if 0
|
|
|
986 if (u->conf->busy_lock && !u->busy_locked) {
|
|
|
987 ngx_http_upstream_busy_lock(p);
|
|
|
988 return;
|
|
|
989 }
|
|
|
990 #endif
|
|
|
991
|
|
|
992 ngx_http_upstream_connect(r, u);
|
|
|
993 }
|
|
|
994
|
|
|
995
|
|
|
996 static void ngx_http_upstream_finalize_request(ngx_http_request_t *r,
|
|
|
997 ngx_http_upstream_t *u,
|
|
|
998 ngx_int_t rc)
|
|
|
999 {
|
|
32
|
1000 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1001 "finalize http upstream request: %i", rc);
|
|
28
|
1002
|
|
|
1003 u->finalize_request(r, rc);
|
|
|
1004
|
|
|
1005 if (u->peer.connection) {
|
|
|
1006 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1007 "close http upstream connection: %d",
|
|
|
1008 u->peer.connection->fd);
|
|
|
1009
|
|
|
1010 ngx_close_connection(u->peer.connection);
|
|
|
1011 }
|
|
|
1012
|
|
32
|
1013 u->peer.connection = NULL;
|
|
|
1014
|
|
28
|
1015 if (u->header_sent
|
|
|
1016 && (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE))
|
|
|
1017 {
|
|
|
1018 rc = 0;
|
|
|
1019 }
|
|
|
1020
|
|
32
|
1021 if (u->saved_log_ctx) {
|
|
|
1022 r->connection->log->data = u->saved_log_ctx;
|
|
|
1023 r->connection->log->handler = u->saved_log_handler;
|
|
28
|
1024 }
|
|
|
1025
|
|
30
|
1026 if (u->pipe.temp_file) {
|
|
28
|
1027 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
1028 "http upstream temp fd: %d",
|
|
|
1029 u->pipe.temp_file->file.fd);
|
|
|
1030 }
|
|
|
1031
|
|
|
1032 #if 0
|
|
|
1033 if (u->cache) {
|
|
|
1034 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
32
|
1035 "http upstream cache fd: %d",
|
|
28
|
1036 u->cache->ctx.file.fd);
|
|
|
1037 }
|
|
|
1038 #endif
|
|
|
1039
|
|
30
|
1040 if (u->pipe.temp_file) {
|
|
28
|
1041 r->file.fd = u->pipe.temp_file->file.fd;
|
|
|
1042
|
|
|
1043 #if 0
|
|
|
1044 } else if (u->cache) {
|
|
|
1045 r->file.fd = u->cache->ctx.file.fd;
|
|
|
1046 #endif
|
|
|
1047 }
|
|
|
1048
|
|
32
|
1049 r->connection->log->action = "sending to client";
|
|
|
1050
|
|
28
|
1051 if (rc == 0 && r->main == NULL) {
|
|
|
1052 rc = ngx_http_send_last(r);
|
|
|
1053 }
|
|
|
1054
|
|
|
1055 ngx_http_finalize_request(r, rc);
|
|
|
1056 }
|
|
|
1057
|
|
|
1058
|
|
|
1059 static size_t ngx_http_upstream_log_status_getlen(ngx_http_request_t *r,
|
|
|
1060 uintptr_t data)
|
|
|
1061 {
|
|
|
1062 if (r->upstream) {
|
|
|
1063 return r->upstream->states.nelts * (3 + 2);
|
|
|
1064 }
|
|
|
1065
|
|
|
1066 return 1;
|
|
|
1067 }
|
|
|
1068
|
|
|
1069
|
|
|
1070 static u_char *ngx_http_upstream_log_status(ngx_http_request_t *r, u_char *buf,
|
|
|
1071 ngx_http_log_op_t *op)
|
|
|
1072 {
|
|
|
1073 ngx_uint_t i;
|
|
|
1074 ngx_http_upstream_t *u;
|
|
|
1075 ngx_http_upstream_state_t *state;
|
|
|
1076
|
|
|
1077 u = r->upstream;
|
|
|
1078
|
|
|
1079 if (u == NULL) {
|
|
|
1080 *buf = '-';
|
|
|
1081 return buf + 1;
|
|
|
1082 }
|
|
|
1083
|
|
|
1084 i = 0;
|
|
|
1085 state = u->states.elts;
|
|
|
1086
|
|
|
1087 for ( ;; ) {
|
|
|
1088 if (state[i].status == 0) {
|
|
|
1089 *buf++ = '-';
|
|
|
1090
|
|
|
1091 } else {
|
|
|
1092 buf = ngx_sprintf(buf, "%ui", state[i].status);
|
|
|
1093 }
|
|
|
1094
|
|
|
1095 if (++i == u->states.nelts) {
|
|
|
1096 return buf;
|
|
|
1097 }
|
|
|
1098
|
|
|
1099 *buf++ = ',';
|
|
|
1100 *buf++ = ' ';
|
|
|
1101 }
|
|
|
1102 }
|
|
|
1103
|
|
|
1104
|
|
32
|
1105 u_char *ngx_http_upstream_log_error(ngx_log_t *log, u_char *buf, size_t len)
|
|
28
|
1106 {
|
|
|
1107 u_char *p;
|
|
|
1108 ngx_int_t escape;
|
|
|
1109 ngx_str_t uri;
|
|
32
|
1110 ngx_http_log_ctx_t *ctx;
|
|
28
|
1111 ngx_http_request_t *r;
|
|
|
1112 ngx_http_upstream_t *u;
|
|
|
1113 ngx_peer_connection_t *peer;
|
|
|
1114
|
|
32
|
1115 ctx = log->data;
|
|
28
|
1116 r = ctx->request;
|
|
|
1117 u = r->upstream;
|
|
|
1118 peer = &u->peer;
|
|
|
1119
|
|
|
1120 p = ngx_snprintf(buf, len,
|
|
|
1121 " while %s, client: %V, URL: %V, upstream: %V%V%s%V",
|
|
32
|
1122 log->action,
|
|
28
|
1123 &r->connection->addr_text,
|
|
|
1124 &r->unparsed_uri,
|
|
|
1125 &u->schema,
|
|
|
1126 &peer->peers->peer[peer->cur_peer].name,
|
|
|
1127 peer->peers->peer[peer->cur_peer].uri_separator,
|
|
|
1128 &u->uri);
|
|
|
1129 len -= p - buf;
|
|
|
1130 buf = p;
|
|
|
1131
|
|
|
1132 if (r->quoted_uri) {
|
|
|
1133 escape = 2 * ngx_escape_uri(NULL, r->uri.data + u->location->len,
|
|
|
1134 r->uri.len - u->location->len,
|
|
|
1135 NGX_ESCAPE_URI);
|
|
|
1136 } else {
|
|
|
1137 escape = 0;
|
|
|
1138 }
|
|
|
1139
|
|
|
1140 if (escape) {
|
|
|
1141 if (len >= r->uri.len - u->location->len + escape) {
|
|
|
1142
|
|
|
1143 ngx_escape_uri(buf, r->uri.data + u->location->len,
|
|
|
1144 r->uri.len - u->location->len, NGX_ESCAPE_URI);
|
|
|
1145
|
|
|
1146 buf += r->uri.len - u->location->len + escape;
|
|
|
1147
|
|
|
1148 if (r->args.len == 0) {
|
|
|
1149 return buf;
|
|
|
1150 }
|
|
|
1151
|
|
|
1152 len -= r->uri.len - u->location->len + escape;
|
|
|
1153
|
|
|
1154 return ngx_snprintf(buf, len, "?%V", &r->args);
|
|
|
1155 }
|
|
|
1156
|
|
|
1157 p = ngx_palloc(r->pool, r->uri.len - u->location->len + escape);
|
|
|
1158 if (p == NULL) {
|
|
|
1159 return buf;
|
|
|
1160 }
|
|
|
1161
|
|
|
1162 ngx_escape_uri(p, r->uri.data + u->location->len,
|
|
|
1163 r->uri.len - u->location->len, NGX_ESCAPE_URI);
|
|
|
1164
|
|
|
1165 uri.len = r->uri.len - u->location->len + escape;
|
|
|
1166 uri.data = p;
|
|
|
1167
|
|
|
1168 } else {
|
|
|
1169 uri.len = r->uri.len - u->location->len;
|
|
|
1170 uri.data = r->uri.data + u->location->len;
|
|
|
1171
|
|
|
1172 }
|
|
|
1173
|
|
|
1174 return ngx_snprintf(buf, len, "%V%s%V",
|
|
|
1175 &uri, r->args.len ? "?" : "", &r->args);
|
|
|
1176 }
|
|
|
1177
|
|
|
1178
|
|
|
1179 static ngx_int_t ngx_http_upstream_add_log_formats(ngx_conf_t *cf)
|
|
|
1180 {
|
|
|
1181 ngx_http_log_op_name_t *op;
|
|
|
1182
|
|
|
1183 for (op = ngx_http_upstream_log_fmt_ops; op->name.len; op++) { /* void */ }
|
|
|
1184 op->run = NULL;
|
|
|
1185
|
|
|
1186 for (op = ngx_http_log_fmt_ops; op->run; op++) {
|
|
|
1187 if (op->name.len == 0) {
|
|
|
1188 op = (ngx_http_log_op_name_t *) op->run;
|
|
|
1189 }
|
|
|
1190 }
|
|
|
1191
|
|
|
1192 op->run = (ngx_http_log_op_run_pt) ngx_http_upstream_log_fmt_ops;
|
|
|
1193
|
|
|
1194 return NGX_OK;
|
|
|
1195 }
|
