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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 #ifndef _NGX_HTTP_UPSTREAM_H_INCLUDED_
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8 #define _NGX_HTTP_UPSTREAM_H_INCLUDED_
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9
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10
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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13 #include <ngx_event.h>
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14 #include <ngx_event_connect.h>
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15 #include <ngx_event_pipe.h>
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16 #include <ngx_http.h>
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17
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18
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214
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19 #define NGX_HTTP_UPSTREAM_FT_ERROR 0x00000002
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20 #define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x00000004
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21 #define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x00000008
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22 #define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x00000010
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23 #define NGX_HTTP_UPSTREAM_FT_HTTP_503 0x00000020
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24 #define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x00000040
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25 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00000080
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26 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00000100
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326
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27 #define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000
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214
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28 #define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000
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28
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29
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30
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31 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40
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32
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33
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34 typedef struct {
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112
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35 ngx_msec_t bl_time;
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58
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36 ngx_uint_t bl_state;
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28
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37
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58
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38 ngx_uint_t status;
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262
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39 time_t response_sec;
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40 ngx_uint_t response_msec;
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112
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41
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58
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42 ngx_str_t *peer;
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28
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43 } ngx_http_upstream_state_t;
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44
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45
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46 typedef struct {
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198
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47 ngx_hash_t headers_in_hash;
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200
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48 ngx_array_t upstreams;
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260
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49 /* ngx_http_upstream_srv_conf_t */
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58
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50 } ngx_http_upstream_main_conf_t;
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51
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260
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52 typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t;
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53
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54 typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf,
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55 ngx_http_upstream_srv_conf_t *us);
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56 typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r,
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57 ngx_http_upstream_srv_conf_t *us);
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58
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59
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60 typedef struct {
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61 ngx_http_upstream_init_pt init_upstream;
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62 ngx_http_upstream_init_peer_pt init;
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63 void *data;
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64 } ngx_http_upstream_peer_t;
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65
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58
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66
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67 typedef struct {
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260
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68 ngx_peer_addr_t *addrs;
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69 ngx_uint_t naddrs;
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70 ngx_uint_t weight;
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71 ngx_uint_t max_fails;
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72 time_t fail_timeout;
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73
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74 unsigned down:1;
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75 unsigned backup:1;
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76 } ngx_http_upstream_server_t;
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77
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200
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78
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260
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79 #define NGX_HTTP_UPSTREAM_CREATE 0x0001
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80 #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002
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81 #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004
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82 #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008
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83 #define NGX_HTTP_UPSTREAM_DOWN 0x0010
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84 #define NGX_HTTP_UPSTREAM_BACKUP 0x0020
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85
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200
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86
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260
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87 struct ngx_http_upstream_srv_conf_s {
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88 ngx_http_upstream_peer_t peer;
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89 void **srv_conf;
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90
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91 ngx_array_t *servers; /* ngx_http_upstream_server_t */
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92
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93 ngx_uint_t flags;
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200
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94 ngx_str_t host;
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336
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95 u_char *file_name;
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200
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96 ngx_uint_t line;
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97 in_port_t port;
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266
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98 in_port_t default_port;
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260
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99 };
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200
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100
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101
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102 typedef struct {
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260
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103 ngx_http_upstream_srv_conf_t *upstream;
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104
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58
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105 ngx_msec_t connect_timeout;
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106 ngx_msec_t send_timeout;
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107 ngx_msec_t read_timeout;
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76
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108 ngx_msec_t timeout;
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28
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109
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58
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110 size_t send_lowat;
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130
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111 size_t buffer_size;
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78
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112
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113 size_t busy_buffers_size;
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114 size_t max_temp_file_size;
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115 size_t temp_file_write_size;
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116
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78
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117 size_t busy_buffers_size_conf;
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118 size_t max_temp_file_size_conf;
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119 size_t temp_file_write_size_conf;
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120
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58
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121 ngx_uint_t next_upstream;
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320
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122 ngx_uint_t store_access;
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123
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58
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124 ngx_bufs_t bufs;
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28
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125
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130
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126 ngx_flag_t buffering;
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58
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127 ngx_flag_t pass_request_headers;
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128 ngx_flag_t pass_request_body;
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129
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178
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130 ngx_flag_t ignore_client_abort;
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206
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131 ngx_flag_t intercept_errors;
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58
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132 ngx_flag_t cyclic_temp_file;
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133
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198
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134 ngx_path_t *temp_path;
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28
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135
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198
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136 ngx_hash_t hide_headers_hash;
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137 ngx_array_t *hide_headers;
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138 ngx_array_t *pass_headers;
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58
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139
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140 ngx_str_t schema;
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126
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141
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320
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142 ngx_array_t *store_lengths;
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143 ngx_array_t *store_values;
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144
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145 signed store:2;
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224
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146 unsigned intercept_404:1;
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198
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147 unsigned change_buffering:1;
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130
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148
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126
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149 #if (NGX_HTTP_SSL)
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150 ngx_ssl_t *ssl;
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151 #endif
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152
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28
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153 } ngx_http_upstream_conf_t;
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154
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155
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58
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156 typedef struct {
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157 ngx_str_t name;
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158 ngx_http_header_handler_pt handler;
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159 ngx_uint_t offset;
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160 ngx_http_header_handler_pt copy_handler;
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161 ngx_uint_t conf;
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64
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162 ngx_uint_t redirect; /* unsigned redirect:1; */
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58
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163 } ngx_http_upstream_header_t;
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164
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165
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166 typedef struct {
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167 ngx_list_t headers;
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168
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78
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169 ngx_uint_t status_n;
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170 ngx_str_t status_line;
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171
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172 ngx_table_elt_t *status;
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173 ngx_table_elt_t *date;
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174 ngx_table_elt_t *server;
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175 ngx_table_elt_t *connection;
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176
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177 ngx_table_elt_t *expires;
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178 ngx_table_elt_t *etag;
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179 ngx_table_elt_t *x_accel_expires;
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64
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180 ngx_table_elt_t *x_accel_redirect;
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181 ngx_table_elt_t *x_accel_limit_rate;
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58
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182
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183 ngx_table_elt_t *content_type;
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184 ngx_table_elt_t *content_length;
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185
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186 ngx_table_elt_t *last_modified;
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187 ngx_table_elt_t *location;
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188 ngx_table_elt_t *accept_ranges;
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78
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189 ngx_table_elt_t *www_authenticate;
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58
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190
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191 #if (NGX_HTTP_GZIP)
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192 ngx_table_elt_t *content_encoding;
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193 #endif
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194
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364
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195 off_t content_length_n;
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196
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197 ngx_array_t cache_control;
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198 } ngx_http_upstream_headers_in_t;
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199
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200
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348
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201 typedef struct {
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202 ngx_str_t host;
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203 in_port_t port;
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204 ngx_uint_t naddrs;
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205 in_addr_t *addrs;
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206 ngx_resolver_ctx_t *ctx;
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207 } ngx_http_upstream_resolved_t;
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208
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209
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210 struct ngx_http_upstream_s {
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211 ngx_peer_connection_t peer;
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212
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130
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213 ngx_event_pipe_t *pipe;
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214
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215 ngx_chain_t *request_bufs;
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216
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217 ngx_output_chain_ctx_t output;
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218 ngx_chain_writer_ctx_t writer;
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219
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220 ngx_http_upstream_conf_t *conf;
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221
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222 ngx_http_upstream_headers_in_t headers_in;
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223
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348
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224 ngx_http_upstream_resolved_t *resolved;
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225
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130
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226 ngx_buf_t buffer;
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227 size_t length;
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228
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229 ngx_chain_t *out_bufs;
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230 ngx_chain_t *busy_bufs;
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231 ngx_chain_t *free_bufs;
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232
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233 ngx_int_t (*input_filter_init)(void *data);
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234 ngx_int_t (*input_filter)(void *data, ssize_t bytes);
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235 void *input_filter_ctx;
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236
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237 ngx_int_t (*create_request)(ngx_http_request_t *r);
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238 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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239 ngx_int_t (*process_header)(ngx_http_request_t *r);
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240 void (*abort_request)(ngx_http_request_t *r);
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241 void (*finalize_request)(ngx_http_request_t *r,
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242 ngx_int_t rc);
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243 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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244 ngx_table_elt_t *h, size_t prefix);
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245
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246 ngx_msec_t timeout;
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247
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248 ngx_http_upstream_state_t *state;
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249
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348
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250 ngx_str_t method;
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251 ngx_str_t schema;
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104
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252 ngx_str_t uri;
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253
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118
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254 ngx_http_cleanup_pt *cleanup;
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255
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318
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256 unsigned store:1;
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340
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257 unsigned cacheable:1;
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258 unsigned accel:1;
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348
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259 unsigned ssl:1;
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260
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198
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261 unsigned buffering:1;
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262
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263 unsigned request_sent:1;
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264 unsigned header_sent:1;
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28
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265 };
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266
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267
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296
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268 ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r,
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269 ngx_http_variable_value_t *v, uintptr_t data);
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270
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271 void ngx_http_upstream_init(ngx_http_request_t *r);
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200
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272 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf,
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260
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273 ngx_url_t *u, ngx_uint_t flags);
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356
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274 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf,
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275 ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev,
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276 ngx_str_t *default_hide_headers, ngx_hash_init_t *hash);
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260
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277
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278
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279 #define ngx_http_conf_upstream_srv_conf(uscf, module) \
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280 uscf->srv_conf[module.ctx_index]
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281
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282
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58
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283 extern ngx_module_t ngx_http_upstream_module;
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28
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284
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285
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286 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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