Mercurial > hg > ngx_http_upstream_keepalive
annotate ngx_http_upstream_keepalive_module.c @ 29:c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Tue, 30 Aug 2011 14:30:58 +0400 |
parents | baf671881a8d |
children | c5b498c5aa3c |
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1 |
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2 /* |
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3 * Copyright (C) Maxim Dounin |
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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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12 typedef struct { |
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13 ngx_uint_t max_cached; |
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14 ngx_uint_t single; /* unsigned:1 */ |
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15 |
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16 ngx_queue_t cache; |
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17 ngx_queue_t free; |
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18 |
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19 ngx_http_upstream_init_pt original_init_upstream; |
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20 ngx_http_upstream_init_peer_pt original_init_peer; |
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21 |
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22 } ngx_http_upstream_keepalive_srv_conf_t; |
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5 | 24 |
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25 typedef struct { |
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26 ngx_http_upstream_keepalive_srv_conf_t *conf; |
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27 |
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28 ngx_http_upstream_t *upstream; |
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29 |
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30 void *data; |
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31 |
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32 ngx_event_get_peer_pt original_get_peer; |
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33 ngx_event_free_peer_pt original_free_peer; |
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34 |
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35 #if (NGX_HTTP_SSL) |
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36 ngx_event_set_peer_session_pt original_set_session; |
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37 ngx_event_save_peer_session_pt original_save_session; |
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38 #endif |
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39 |
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40 ngx_uint_t failed; /* unsigned:1 */ |
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42 } ngx_http_upstream_keepalive_peer_data_t; |
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45 typedef struct { |
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46 ngx_http_upstream_keepalive_srv_conf_t *conf; |
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47 |
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48 ngx_queue_t queue; |
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49 ngx_connection_t *connection; |
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50 |
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51 socklen_t socklen; |
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52 struct sockaddr_storage sockaddr; |
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53 |
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54 } ngx_http_upstream_keepalive_cache_t; |
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57 static ngx_int_t ngx_http_upstream_init_keepalive_peer(ngx_http_request_t *r, |
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58 ngx_http_upstream_srv_conf_t *us); |
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59 static ngx_int_t ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, |
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60 void *data); |
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61 static void ngx_http_upstream_free_keepalive_peer(ngx_peer_connection_t *pc, |
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62 void *data, ngx_uint_t state); |
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63 |
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64 static void ngx_http_upstream_keepalive_dummy_handler(ngx_event_t *ev); |
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65 static void ngx_http_upstream_keepalive_close_handler(ngx_event_t *ev); |
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66 |
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67 #if (NGX_HTTP_SSL) |
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68 static ngx_int_t ngx_http_upstream_keepalive_set_session( |
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69 ngx_peer_connection_t *pc, void *data); |
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70 static void ngx_http_upstream_keepalive_save_session(ngx_peer_connection_t *pc, |
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71 void *data); |
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72 #endif |
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74 static void *ngx_http_upstream_keepalive_create_conf(ngx_conf_t *cf); |
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75 static char *ngx_http_upstream_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, |
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76 void *conf); |
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77 |
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78 |
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79 static ngx_command_t ngx_http_upstream_keepalive_commands[] = { |
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80 |
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81 { ngx_string("keepalive"), |
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82 NGX_HTTP_UPS_CONF|NGX_CONF_TAKE12, |
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83 ngx_http_upstream_keepalive, |
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84 0, |
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85 0, |
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86 NULL }, |
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87 |
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88 ngx_null_command |
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89 }; |
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90 |
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91 |
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92 static ngx_http_module_t ngx_http_upstream_keepalive_module_ctx = { |
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93 NULL, /* preconfiguration */ |
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94 NULL, /* postconfiguration */ |
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95 |
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96 NULL, /* create main configuration */ |
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97 NULL, /* init main configuration */ |
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98 |
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99 ngx_http_upstream_keepalive_create_conf, /* create server configuration */ |
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100 NULL, /* merge server configuration */ |
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101 |
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102 NULL, /* create location configuration */ |
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103 NULL /* merge location configuration */ |
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104 }; |
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105 |
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106 |
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107 ngx_module_t ngx_http_upstream_keepalive_module = { |
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108 NGX_MODULE_V1, |
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109 &ngx_http_upstream_keepalive_module_ctx, /* module context */ |
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110 ngx_http_upstream_keepalive_commands, /* module directives */ |
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111 NGX_HTTP_MODULE, /* module type */ |
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112 NULL, /* init master */ |
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113 NULL, /* init module */ |
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114 NULL, /* init process */ |
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115 NULL, /* init thread */ |
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116 NULL, /* exit thread */ |
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117 NULL, /* exit process */ |
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118 NULL, /* exit master */ |
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119 NGX_MODULE_V1_PADDING |
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120 }; |
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121 |
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122 |
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123 ngx_int_t |
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124 ngx_http_upstream_init_keepalive(ngx_conf_t *cf, |
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125 ngx_http_upstream_srv_conf_t *us) |
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126 { |
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127 ngx_uint_t i; |
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128 ngx_http_upstream_keepalive_srv_conf_t *kcf; |
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129 ngx_http_upstream_keepalive_cache_t *cached; |
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130 |
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131 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, cf->log, 0, |
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132 "init keepalive"); |
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133 |
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134 kcf = ngx_http_conf_upstream_srv_conf(us, |
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135 ngx_http_upstream_keepalive_module); |
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136 |
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137 if (kcf->original_init_upstream(cf, us) != NGX_OK) { |
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138 return NGX_ERROR; |
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139 } |
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140 |
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141 kcf->original_init_peer = us->peer.init; |
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142 |
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143 us->peer.init = ngx_http_upstream_init_keepalive_peer; |
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144 |
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145 /* allocate cache items and add to free queue */ |
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146 |
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147 cached = ngx_pcalloc(cf->pool, |
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148 sizeof(ngx_http_upstream_keepalive_cache_t) * kcf->max_cached); |
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149 if (cached == NULL) { |
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150 return NGX_ERROR; |
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151 } |
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152 |
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153 ngx_queue_init(&kcf->cache); |
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154 ngx_queue_init(&kcf->free); |
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155 |
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156 for (i = 0; i < kcf->max_cached; i++) { |
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157 ngx_queue_insert_head(&kcf->free, &cached[i].queue); |
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158 cached[i].conf = kcf; |
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159 } |
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160 |
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161 return NGX_OK; |
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162 } |
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163 |
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164 |
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165 static ngx_int_t |
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166 ngx_http_upstream_init_keepalive_peer(ngx_http_request_t *r, |
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167 ngx_http_upstream_srv_conf_t *us) |
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168 { |
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169 ngx_http_upstream_keepalive_peer_data_t *kp; |
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170 ngx_http_upstream_keepalive_srv_conf_t *kcf; |
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171 |
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172 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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173 "init keepalive peer"); |
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174 |
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175 kcf = ngx_http_conf_upstream_srv_conf(us, |
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176 ngx_http_upstream_keepalive_module); |
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177 |
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178 kp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_keepalive_peer_data_t)); |
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179 if (kp == NULL) { |
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180 return NGX_ERROR; |
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181 } |
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182 |
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183 if (kcf->original_init_peer(r, us) != NGX_OK) { |
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184 return NGX_ERROR; |
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185 } |
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186 |
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187 kp->conf = kcf; |
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188 kp->upstream = r->upstream; |
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189 kp->data = r->upstream->peer.data; |
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190 kp->original_get_peer = r->upstream->peer.get; |
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191 kp->original_free_peer = r->upstream->peer.free; |
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192 |
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193 r->upstream->peer.data = kp; |
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194 r->upstream->peer.get = ngx_http_upstream_get_keepalive_peer; |
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195 r->upstream->peer.free = ngx_http_upstream_free_keepalive_peer; |
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196 |
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197 #if (NGX_HTTP_SSL) |
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198 kp->original_set_session = r->upstream->peer.set_session; |
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199 kp->original_save_session = r->upstream->peer.save_session; |
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200 r->upstream->peer.set_session = ngx_http_upstream_keepalive_set_session; |
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201 r->upstream->peer.save_session = ngx_http_upstream_keepalive_save_session; |
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202 #endif |
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203 |
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204 return NGX_OK; |
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205 } |
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206 |
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207 |
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208 static ngx_int_t |
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209 ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, void *data) |
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210 { |
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211 ngx_http_upstream_keepalive_peer_data_t *kp = data; |
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212 ngx_http_upstream_keepalive_cache_t *item; |
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213 |
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214 ngx_int_t rc; |
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215 ngx_queue_t *q, *cache; |
5 | 216 ngx_connection_t *c; |
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217 |
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218 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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219 "get keepalive peer"); |
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220 |
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221 kp->failed = 0; |
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222 |
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223 /* single pool of cached connections */ |
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224 |
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225 if (kp->conf->single && !ngx_queue_empty(&kp->conf->cache)) { |
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226 |
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227 q = ngx_queue_head(&kp->conf->cache); |
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228 |
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229 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); |
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230 c = item->connection; |
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231 |
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232 ngx_queue_remove(q); |
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233 ngx_queue_insert_head(&kp->conf->free, q); |
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234 |
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235 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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236 "get keepalive peer: using connection %p", c); |
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237 |
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238 c->idle = 0; |
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239 c->log = pc->log; |
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240 c->read->log = pc->log; |
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241 c->write->log = pc->log; |
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242 |
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243 pc->connection = c; |
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244 pc->cached = 1; |
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245 |
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246 return NGX_DONE; |
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247 } |
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248 |
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249 rc = kp->original_get_peer(pc, kp->data); |
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250 |
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251 if (kp->conf->single || rc != NGX_OK) { |
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252 return rc; |
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253 } |
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254 |
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255 /* search cache for suitable connection */ |
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256 |
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257 cache = &kp->conf->cache; |
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258 |
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259 for (q = ngx_queue_head(cache); |
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260 q != ngx_queue_sentinel(cache); |
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261 q = ngx_queue_next(q)) |
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262 { |
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263 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); |
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264 c = item->connection; |
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265 |
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266 if (ngx_memn2cmp((u_char *) &item->sockaddr, (u_char *) pc->sockaddr, |
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267 item->socklen, pc->socklen) |
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268 == 0) |
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269 { |
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270 ngx_queue_remove(q); |
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271 ngx_queue_insert_head(&kp->conf->free, q); |
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272 |
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273 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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274 "get keepalive peer: using connection %p", c); |
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275 |
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276 c->idle = 0; |
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277 c->log = pc->log; |
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278 c->read->log = pc->log; |
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279 c->write->log = pc->log; |
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280 |
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281 pc->connection = c; |
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282 pc->cached = 1; |
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283 |
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284 return NGX_DONE; |
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285 } |
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286 } |
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287 |
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288 return NGX_OK; |
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289 } |
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290 |
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291 |
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292 static void |
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293 ngx_http_upstream_free_keepalive_peer(ngx_peer_connection_t *pc, void *data, |
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294 ngx_uint_t state) |
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295 { |
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296 ngx_http_upstream_keepalive_peer_data_t *kp = data; |
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297 ngx_http_upstream_keepalive_cache_t *item; |
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298 |
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299 ngx_uint_t status; |
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300 ngx_queue_t *q; |
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301 ngx_connection_t *c; |
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302 ngx_http_upstream_t *u; |
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303 |
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304 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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305 "free keepalive peer"); |
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306 |
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307 /* remember failed state - peer.free() may be called more than once */ |
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308 |
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309 if (state & NGX_PEER_FAILED) { |
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310 kp->failed = 1; |
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311 } |
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312 |
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313 /* |
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314 * cache valid connections |
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315 * |
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316 * For memcached this means status either 404 or 200. For status 200 we |
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317 * should also check if all response body was read (u->length == 0) and |
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318 * make sure that u->length is valid (we use u->header_sent flag to test |
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319 * this). Memcached is the only supported protocol for now. |
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320 * |
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321 * Some notes on other possibilities (incomplete): |
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322 * |
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323 * fastcgi: u->pipe->upstream_done should be sufficient |
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324 * |
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325 * proxy buffered: u->pipe->upstream_done, 304 replies, replies to head |
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326 * requests (see RFC 2616, 4.4 Message Length) |
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327 * |
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328 * proxy unbuffered: 200 as for memcached (with u->length == 0 and |
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329 * header_sent), 304, replies to head requests |
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330 * |
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331 * subrequest_in_memory: won't work as of now |
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332 * |
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333 * TODO: move this logic to protocol modules (NGX_PEER_KEEPALIVE?) |
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334 */ |
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335 |
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336 u = kp->upstream; |
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337 c = pc->connection; |
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338 status = u->headers_in.status_n; |
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339 |
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340 if (!kp->failed |
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341 && c != NULL |
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342 && !c->read->timedout |
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343 && !c->write->timedout |
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344 #if (NGX_UPSTREAM_KEEPALIVE_PATCHED) |
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345 && u->keepalive) |
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346 #else |
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347 && (status == NGX_HTTP_NOT_FOUND |
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348 || (status == NGX_HTTP_OK && u->header_sent && u->length == 0))) |
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349 #endif |
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350 { |
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351 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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352 "free keepalive peer: saving connection %p", c); |
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353 |
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354 if (ngx_queue_empty(&kp->conf->free)) { |
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355 |
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356 q = ngx_queue_last(&kp->conf->cache); |
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357 ngx_queue_remove(q); |
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358 |
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359 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, |
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360 queue); |
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Keepalive: always save connections to cache.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
361 |
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Keepalive: always save connections to cache.
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diff
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|
362 ngx_close_connection(item->connection); |
2
8545bbda9e4b
Keepalive: reimplement using queues.
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parents:
1
diff
changeset
|
363 |
3
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Keepalive: always save connections to cache.
Maxim Dounin <mdounin@mdounin.ru>
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2
diff
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|
364 } else { |
42e64900483b
Keepalive: always save connections to cache.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
365 q = ngx_queue_head(&kp->conf->free); |
42e64900483b
Keepalive: always save connections to cache.
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diff
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|
366 ngx_queue_remove(q); |
42e64900483b
Keepalive: always save connections to cache.
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2
diff
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|
367 |
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diff
changeset
|
368 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, |
42e64900483b
Keepalive: always save connections to cache.
Maxim Dounin <mdounin@mdounin.ru>
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2
diff
changeset
|
369 queue); |
42e64900483b
Keepalive: always save connections to cache.
Maxim Dounin <mdounin@mdounin.ru>
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2
diff
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|
370 } |
42e64900483b
Keepalive: always save connections to cache.
Maxim Dounin <mdounin@mdounin.ru>
parents:
2
diff
changeset
|
371 |
2
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Keepalive: reimplement using queues.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
372 item->connection = c; |
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Keepalive: reimplement using queues.
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diff
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|
373 ngx_queue_insert_head(&kp->conf->cache, q); |
8545bbda9e4b
Keepalive: reimplement using queues.
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diff
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|
374 |
1
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Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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0
diff
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|
375 pc->connection = NULL; |
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Keepalive: common cache for all backends.
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diff
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|
376 |
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Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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0
diff
changeset
|
377 if (c->read->timer_set) { |
ca955a7f651b
Keepalive: common cache for all backends.
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diff
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|
378 ngx_del_timer(c->read); |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
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|
379 } |
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Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
380 if (c->write->timer_set) { |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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0
diff
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|
381 ngx_del_timer(c->write); |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
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|
382 } |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
383 |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
changeset
|
384 c->write->handler = ngx_http_upstream_keepalive_dummy_handler; |
ca955a7f651b
Keepalive: common cache for all backends.
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diff
changeset
|
385 c->read->handler = ngx_http_upstream_keepalive_close_handler; |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
changeset
|
386 |
8
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Keepalive: fix connection closing and avoid for loop there.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
387 c->data = item; |
1
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Keepalive: common cache for all backends.
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diff
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|
388 c->idle = 1; |
ca955a7f651b
Keepalive: common cache for all backends.
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diff
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|
389 c->log = ngx_cycle->log; |
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Keepalive: common cache for all backends.
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diff
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|
390 c->read->log = ngx_cycle->log; |
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Keepalive: common cache for all backends.
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0
diff
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|
391 c->write->log = ngx_cycle->log; |
6
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
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5
diff
changeset
|
392 |
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
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5
diff
changeset
|
393 item->socklen = pc->socklen; |
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
394 ngx_memcpy(&item->sockaddr, pc->sockaddr, pc->socklen); |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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0
diff
changeset
|
395 } |
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Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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0
diff
changeset
|
396 |
0
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Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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|
397 return kp->original_free_peer(pc, kp->data, state); |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
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diff
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|
398 } |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
399 |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
400 |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
401 static void |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
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|
402 ngx_http_upstream_keepalive_dummy_handler(ngx_event_t *ev) |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
changeset
|
403 { |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
changeset
|
404 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
changeset
|
405 "keepalive dummy handler"); |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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0
diff
changeset
|
406 } |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
407 |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
408 |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
409 static void |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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0
diff
changeset
|
410 ngx_http_upstream_keepalive_close_handler(ngx_event_t *ev) |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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0
diff
changeset
|
411 { |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
412 ngx_http_upstream_keepalive_srv_conf_t *conf; |
2
8545bbda9e4b
Keepalive: reimplement using queues.
Maxim Dounin <mdounin@mdounin.ru>
parents:
1
diff
changeset
|
413 ngx_http_upstream_keepalive_cache_t *item; |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
414 |
21
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
415 int n; |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
diff
changeset
|
416 char buf[1]; |
1
ca955a7f651b
Keepalive: common cache for all backends.
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parents:
0
diff
changeset
|
417 ngx_connection_t *c; |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
changeset
|
418 |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
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|
419 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
changeset
|
420 "keepalive close handler"); |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
421 |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
422 c = ev->data; |
21
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
423 |
24
2ee28064a04a
Keepalive: correctly close connections on gracefull shutdown.
Maxim Dounin <mdounin@mdounin.ru>
parents:
21
diff
changeset
|
424 if (c->close) { |
2ee28064a04a
Keepalive: correctly close connections on gracefull shutdown.
Maxim Dounin <mdounin@mdounin.ru>
parents:
21
diff
changeset
|
425 goto close; |
2ee28064a04a
Keepalive: correctly close connections on gracefull shutdown.
Maxim Dounin <mdounin@mdounin.ru>
parents:
21
diff
changeset
|
426 } |
2ee28064a04a
Keepalive: correctly close connections on gracefull shutdown.
Maxim Dounin <mdounin@mdounin.ru>
parents:
21
diff
changeset
|
427 |
21
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
428 n = recv(c->fd, buf, 1, MSG_PEEK); |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
429 |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
430 if (n == -1 && ngx_socket_errno == NGX_EAGAIN) { |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
431 /* stale event */ |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
432 |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
433 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
434 goto close; |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
435 } |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
436 |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
437 return; |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
438 } |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
439 |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
440 close: |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
441 |
8
565939797f5c
Keepalive: fix connection closing and avoid for loop there.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6
diff
changeset
|
442 item = c->data; |
565939797f5c
Keepalive: fix connection closing and avoid for loop there.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6
diff
changeset
|
443 conf = item->conf; |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
444 |
8
565939797f5c
Keepalive: fix connection closing and avoid for loop there.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6
diff
changeset
|
445 ngx_queue_remove(&item->queue); |
565939797f5c
Keepalive: fix connection closing and avoid for loop there.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6
diff
changeset
|
446 ngx_close_connection(item->connection); |
565939797f5c
Keepalive: fix connection closing and avoid for loop there.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6
diff
changeset
|
447 ngx_queue_insert_head(&conf->free, &item->queue); |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
448 } |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
449 |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
450 |
29
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
451 #if (NGX_HTTP_SSL) |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
452 |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
453 static ngx_int_t |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
454 ngx_http_upstream_keepalive_set_session(ngx_peer_connection_t *pc, void *data) |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
455 { |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
456 ngx_http_upstream_keepalive_peer_data_t *kp = data; |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
457 |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
458 return kp->original_set_session(pc, kp->data); |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
459 } |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
460 |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
461 |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
462 static void |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
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parents:
28
diff
changeset
|
463 ngx_http_upstream_keepalive_save_session(ngx_peer_connection_t *pc, void *data) |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
464 { |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
465 ngx_http_upstream_keepalive_peer_data_t *kp = data; |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
466 |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
467 kp->original_save_session(pc, kp->data); |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
468 return; |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
469 } |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
470 |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
471 #endif |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
472 |
c7c4b2d68fdf
Keepalive: set_session and save_session callbacks.
Maxim Dounin <mdounin@mdounin.ru>
parents:
28
diff
changeset
|
473 |
0
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
474 static void * |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
475 ngx_http_upstream_keepalive_create_conf(ngx_conf_t *cf) |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
476 { |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
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477 ngx_http_upstream_keepalive_srv_conf_t *conf; |
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478 |
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479 conf = ngx_pcalloc(cf->pool, |
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480 sizeof(ngx_http_upstream_keepalive_srv_conf_t)); |
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481 if (conf == NULL) { |
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482 return NULL; |
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Keepalive upstream balancer: transparent skeleton.
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483 } |
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484 |
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485 /* |
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486 * set by ngx_pcalloc(): |
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487 * |
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488 * conf->original_init_upstream = NULL; |
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489 * conf->original_init_peer = NULL; |
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490 */ |
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491 |
1
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492 conf->max_cached = 1; |
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493 |
0
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494 return conf; |
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495 } |
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496 |
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497 |
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498 static char * |
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499 ngx_http_upstream_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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500 { |
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501 ngx_http_upstream_srv_conf_t *uscf; |
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502 ngx_http_upstream_keepalive_srv_conf_t *kcf; |
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503 |
1
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504 ngx_int_t n; |
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505 ngx_str_t *value; |
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506 ngx_uint_t i; |
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507 |
0
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508 uscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_upstream_module); |
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509 |
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510 kcf = ngx_http_conf_upstream_srv_conf(uscf, |
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511 ngx_http_upstream_keepalive_module); |
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512 |
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513 kcf->original_init_upstream = uscf->peer.init_upstream |
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514 ? uscf->peer.init_upstream |
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515 : ngx_http_upstream_init_round_robin; |
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516 |
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517 uscf->peer.init_upstream = ngx_http_upstream_init_keepalive; |
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518 |
1
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519 /* read options */ |
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520 |
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521 value = cf->args->elts; |
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522 |
6
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523 n = ngx_atoi(value[1].data, value[1].len); |
1
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524 |
6
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525 if (n == NGX_ERROR || n == 0) { |
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526 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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527 "invalid value \"%V\" in \"%V\" directive", |
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528 &value[1], &cmd->name); |
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529 return NGX_CONF_ERROR; |
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530 } |
1
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531 |
6
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532 kcf->max_cached = n; |
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|
533 |
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|
534 for (i = 2; i < cf->args->nelts; i++) { |
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Keepalive: distinguish between upstream servers by default.
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diff
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|
535 |
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536 if (ngx_strcmp(value[i].data, "single") == 0) { |
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Keepalive: distinguish between upstream servers by default.
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diff
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|
537 |
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|
538 kcf->single = 1; |
1
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539 |
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diff
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|
540 continue; |
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Keepalive: common cache for all backends.
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diff
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|
541 } |
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Keepalive: common cache for all backends.
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diff
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|
542 |
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Keepalive: common cache for all backends.
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|
543 goto invalid; |
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Keepalive: common cache for all backends.
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0
diff
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|
544 } |
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Keepalive: common cache for all backends.
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0
diff
changeset
|
545 |
0
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546 return NGX_CONF_OK; |
1
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diff
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|
547 |
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Keepalive: common cache for all backends.
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parents:
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diff
changeset
|
548 invalid: |
ca955a7f651b
Keepalive: common cache for all backends.
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parents:
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diff
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|
549 |
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Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
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|
550 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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Keepalive: common cache for all backends.
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0
diff
changeset
|
551 "invalid parameter \"%V\"", &value[i]); |
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Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
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|
552 |
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Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
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|
553 return NGX_CONF_ERROR; |
0
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Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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|
554 } |