Mercurial > hg > nginx
annotate src/http/modules/ngx_http_event_proxy_handler.c @ 20:a649c0a0adb3
nginx-0.0.1-2002-12-03-18:45:38 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 03 Dec 2002 15:45:38 +0000 |
parents | d7908993fdeb |
children | df7fb216a149 |
rev | line source |
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1 |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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4 #include <ngx_string.h> |
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5 #include <ngx_file.h> |
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6 #include <ngx_hunk.h> |
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7 #include <ngx_event_write.h> |
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8 #include <ngx_http.h> |
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9 #include <ngx_http_event_proxy_handler.h> |
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10 |
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11 ngx_http_module_t ngx_http_proxy_module; |
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14 static ngx_chain_t *ngx_http_proxy_create_request(ngx_http_request_t *r); |
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15 static int ngx_http_proxy_connect(ngx_http_request_t *r, |
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16 struct sockaddr_in *addr, |
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17 char *addr_text); |
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18 static int ngx_http_proxy_send_request(ngx_event_t *ev); |
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19 |
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21 int ngx_http_proxy_handler(ngx_http_request_t *r) |
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22 { |
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23 struct sockaddr_in addr; |
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24 ngx_chain_t *chain; |
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25 ngx_http_proxy_ctx_t *p; |
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26 |
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27 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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28 |
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29 if (p == NULL) |
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30 ngx_http_create_ctx(r, p, ngx_http_proxy_module, |
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31 sizeof(ngx_http_proxy_ctx_t)); |
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32 |
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33 chain = ngx_http_proxy_create_request(r); |
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34 if (chain == NULL) |
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35 return NGX_ERROR; |
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36 |
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37 p->out = chain; |
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38 |
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39 ngx_memzero(&addr, sizeof(struct sockaddr_in)); |
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40 addr.sin_family = AF_INET; |
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41 addr.sin_addr.s_addr = inet_addr("127.0.0.1"); |
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42 addr.sin_port = htons(9000); |
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43 |
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44 ngx_http_proxy_connect(r, &addr, "connecting to 127.0.0.1:9000"); |
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45 } |
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47 |
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48 static ngx_chain_t *ngx_http_proxy_create_request(ngx_http_request_t *r) |
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49 { |
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50 int i; |
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51 size_t len; |
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52 ngx_hunk_t *hunk; |
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53 ngx_chain_t *chain; |
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54 ngx_table_elt_t *header; |
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55 |
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56 /* STUB */ |
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57 int size = 1024; |
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58 |
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59 /* "+ 2" is for "\r\n" */ |
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60 len = r->request_line.len + 2; |
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61 |
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62 header = (ngx_table_elt_t *) r->headers_in.headers->elts; |
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63 for (i = 0; i < r->headers_in.headers->nelts; i++) { |
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64 if (&header[i] == r->headers_in.host) |
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65 continue; |
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66 |
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67 /* "+ 4" is for ": " and "\r\n" */ |
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68 len += header[i].key.len + header[i].value.len + 4; |
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69 } |
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70 |
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71 /* add "\r\n" at the header end */ |
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72 len += 2; |
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73 |
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74 /* STUB */ len++; |
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75 |
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76 ngx_test_null(hunk, ngx_create_temp_hunk(r->pool, len, 0, 0), NULL); |
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77 ngx_add_hunk_to_chain(chain, hunk, r->pool, NULL); |
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78 |
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79 ngx_memcpy(hunk->last.mem, r->request_line.data, r->request_line.len); |
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80 hunk->last.mem += r->request_line.len; |
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81 *(hunk->last.mem++) = CR; *(hunk->last.mem++) = LF; |
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82 |
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83 for (i = 0; i < r->headers_in.headers->nelts; i++) { |
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84 if (&header[i] == r->headers_in.host) |
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85 continue; |
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86 |
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87 ngx_memcpy(hunk->last.mem, header[i].key.data, header[i].key.len); |
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88 hunk->last.mem += header[i].key.len; |
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89 |
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90 *(hunk->last.mem++) = ':'; *(hunk->last.mem++) = ' '; |
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91 |
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92 ngx_memcpy(hunk->last.mem, header[i].value.data, header[i].value.len); |
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93 hunk->last.mem += header[i].value.len; |
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94 |
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95 *(hunk->last.mem++) = CR; *(hunk->last.mem++) = LF; |
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96 |
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97 ngx_log_debug(r->connection->log, "proxy: '%s: %s'" _ |
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98 header[i].key.data _ header[i].value.data); |
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99 } |
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100 |
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101 /* add "\r\n" at the header end */ |
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102 *(hunk->last.mem++) = CR; *(hunk->last.mem++) = LF; |
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103 |
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104 /* STUB */ *(hunk->last.mem++) = '\0'; |
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105 ngx_log_debug(r->connection->log, "PROXY:\n'%s'" _ hunk->pos.mem); |
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106 |
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107 return chain; |
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108 } |
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109 |
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110 static int ngx_http_proxy_connect(ngx_http_request_t *r, |
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111 struct sockaddr_in *addr, |
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112 char *addr_text) |
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113 { |
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114 int rc; |
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115 ngx_err_t err; |
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116 ngx_socket_t s; |
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117 ngx_connection_t *c, *pc; |
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118 ngx_http_log_ctx_t *ctx; |
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119 |
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120 c = r->connection; |
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121 ctx = c->log->data; |
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122 ctx->action = addr_text; |
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123 |
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124 s = ngx_socket(AF_INET, SOCK_STREAM, IPPROTO_IP, 0); |
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125 if (s == -1) { |
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126 ngx_log_error(NGX_LOG_ERR, c->log, ngx_socket_errno, |
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127 ngx_socket_n " failed"); |
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128 return NGX_ERROR; |
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129 } |
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130 |
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131 #if 0 |
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132 if (rcvbuf) { |
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133 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, |
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134 (const void *) &rcvbuf, sizeof(int)) == -1) { |
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135 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno, |
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136 "setsockopt(SO_RCVBUF) failed"); |
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137 |
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138 if (ngx_close_socket(s) == -1) |
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139 ngx_log_error(NGX_LOG_ERR, c->log, ngx_socket_errno, |
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140 ngx_close_socket_n " failed"); |
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141 |
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142 return NGX_ERROR; |
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143 } |
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144 } |
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145 #endif |
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146 |
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147 if (ngx_nonblocking(s) == -1) { |
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148 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno, |
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149 ngx_nonblocking_n " failed"); |
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150 |
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151 if (ngx_close_socket(s) == -1) |
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152 ngx_log_error(NGX_LOG_ERR, c->log, ngx_socket_errno, |
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153 ngx_close_socket_n " failed"); |
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154 |
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155 return NGX_ERROR; |
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156 } |
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157 |
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158 rc = connect(s, (struct sockaddr *) addr, sizeof(struct sockaddr_in)); |
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159 |
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160 if (rc == -1) { |
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161 err = ngx_socket_errno; |
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162 if (err != NGX_EINPROGRESS) { |
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163 ngx_log_error(NGX_LOG_ERR, c->log, err, "connect() failed"); |
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164 |
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165 if (ngx_close_socket(s) == -1) |
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166 ngx_log_error(NGX_LOG_ERR, c->log, ngx_socket_errno, |
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167 ngx_close_socket_n " failed"); |
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168 |
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169 return NGX_ERROR; |
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170 } |
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171 } |
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172 |
20
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173 pc = &ngx_connections[s]; |
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174 |
19
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175 ngx_memzero(&ngx_read_events[s], sizeof(ngx_event_t)); |
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176 ngx_memzero(&ngx_write_events[s], sizeof(ngx_event_t)); |
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177 ngx_memzero(&ngx_connections[s], sizeof(ngx_connection_t)); |
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178 |
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179 ngx_read_events[s].data = ngx_write_events[s].data = &ngx_connections[s]; |
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180 ngx_connections[s].read = &ngx_read_events[s]; |
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181 ngx_connections[s].write = &ngx_write_events[s]; |
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182 |
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183 ngx_connections[s].data = r; |
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184 |
19
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185 ngx_connections[s].fd = s; |
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186 ngx_connections[s].server = c->server; |
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187 ngx_connections[s].servers = c->servers; |
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188 |
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189 ngx_connections[s].log = |
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190 ngx_read_events[s].log = ngx_write_events[s].log = c->log; |
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191 |
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192 ngx_test_null(pc->pool, |
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193 ngx_create_pool(/* STUB */ 1024 /* */, pc->log), |
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194 NGX_ERROR); |
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195 |
19
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196 if (rc == -1) { |
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197 ngx_write_events[s].event_handler = ngx_http_proxy_send_request; |
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198 |
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199 return ngx_add_event(&ngx_write_events[s], |
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200 NGX_WRITE_EVENT, NGX_ONESHOT_EVENT); |
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201 } |
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202 |
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203 ngx_write_events[s].write = 1; |
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204 ngx_write_events[s].ready = 1; |
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205 |
20
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206 return ngx_http_proxy_send_request(&ngx_write_events[s]); |
19
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207 } |
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208 |
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209 static int ngx_http_proxy_send_request(ngx_event_t *ev) |
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210 { |
20
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211 ngx_chain_t *chain; |
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212 ngx_connection_t *c; |
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213 ngx_http_request_t *r; |
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214 ngx_http_proxy_ctx_t *p; |
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215 |
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216 c = (ngx_connection_t *) ev->data; |
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217 r = (ngx_http_request_t *) c->data; |
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218 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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219 |
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220 chain = ngx_event_write(c, p->out, 0); |
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221 if (chain == (ngx_chain_t *) -1) |
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222 return NGX_ERROR; |
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223 |
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224 p->out = chain; |
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225 |
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226 /* STUB */ return NGX_ERROR; |
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227 return NGX_OK; |
19
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228 } |
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229 |
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230 #if 0 |
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231 |
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232 static int ngx_http_proxy_send_request(ngx_event_t *ev) |
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233 { |
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234 ngx_connection_t *c; |
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235 ngx_http_request_t *r; |
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236 ngx_http_proxy_ctx_t *p; |
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237 |
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238 c = (ngx_connection_t *) ev->data; |
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239 r = (ngx_http_request_t *) c->data; |
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240 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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241 |
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242 n = ngx_send(p->fd, p->header_out->pos.mem, |
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243 p->header_out->end.mem - p->header_out->pos.mem); |
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244 |
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245 if (n == NGX_ERROR) { |
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246 ngx_log_error(NGX_LOG_ERR, r->log, ngx_socket_errno, |
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247 ngx_send_n " %s falied", p->addr_text); |
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248 return NGX_ERROR; |
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249 } |
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250 |
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251 p->header_out->pos.mem += n; |
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252 |
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253 if (p->header_out->end.mem - p->header_out->pos.mem > 0) |
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254 return NGX_AGAIN; |
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255 |
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256 /* TODO: body */ |
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257 |
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258 return NGX_OK; |
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259 } |
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260 |
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261 static int ngx_http_proxy_read_response_header(ngx_event_t *ev) |
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262 { |
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263 ngx_connection_t *c; |
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264 ngx_http_request_t *r; |
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265 ngx_http_proxy_ctx_t *p; |
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266 |
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267 if (ev->timedout) |
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268 return NGX_ERROR; |
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269 |
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270 c = (ngx_connection_t *) ev->data; |
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271 r = (ngx_http_request_t *) c->data; |
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272 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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273 |
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274 n = ngx_event_recv(c, p->header_in->last.mem, |
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275 p->header_in->end - p->header_in->last.mem); |
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276 |
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277 } |
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278 |
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279 static int ngx_http_proxy_read_response_body(ngx_event_t *ev) |
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280 { |
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281 ngx_connection_t *c; |
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282 ngx_http_request_t *r; |
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283 ngx_http_proxy_ctx_t *p; |
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284 |
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285 if (ev->timedout) |
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286 return NGX_ERROR; |
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287 |
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288 c = (ngx_connection_t *) ev->data; |
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289 r = (ngx_http_request_t *) c->data; |
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290 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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291 |
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292 } |
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293 |
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294 static int ngx_http_proxy_write_to_client(ngx_event_t *ev) |
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295 { |
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296 /* если бэкенд быстрее, то CLEAR, иначе - ONESHOT */ |
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297 |
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298 rc = ngx_http_output_filter(r, h); |
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299 } |
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300 |
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301 #endif |