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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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412
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23 #define NGX_HTTP_UPSTREAM_FT_HTTP_502 0x00000020
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24 #define NGX_HTTP_UPSTREAM_FT_HTTP_503 0x00000040
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25 #define NGX_HTTP_UPSTREAM_FT_HTTP_504 0x00000080
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26 #define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x00000100
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27 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00000200
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28 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00000400
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326
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29 #define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000
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214
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30 #define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000
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28
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31
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412
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32 #define NGX_HTTP_UPSTREAM_FT_STATUS (NGX_HTTP_UPSTREAM_FT_HTTP_500 \
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33 |NGX_HTTP_UPSTREAM_FT_HTTP_502 \
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34 |NGX_HTTP_UPSTREAM_FT_HTTP_503 \
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35 |NGX_HTTP_UPSTREAM_FT_HTTP_504 \
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36 |NGX_HTTP_UPSTREAM_FT_HTTP_404)
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28
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37
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38 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40
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39
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40
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41 typedef struct {
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112
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42 ngx_msec_t bl_time;
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58
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43 ngx_uint_t bl_state;
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28
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44
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58
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45 ngx_uint_t status;
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262
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46 time_t response_sec;
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47 ngx_uint_t response_msec;
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430
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48 off_t response_length;
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112
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49
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58
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50 ngx_str_t *peer;
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28
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51 } ngx_http_upstream_state_t;
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52
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53
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54 typedef struct {
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198
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55 ngx_hash_t headers_in_hash;
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200
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56 ngx_array_t upstreams;
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260
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57 /* ngx_http_upstream_srv_conf_t */
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58
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58 } ngx_http_upstream_main_conf_t;
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59
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260
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60 typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t;
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61
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62 typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf,
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63 ngx_http_upstream_srv_conf_t *us);
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64 typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r,
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65 ngx_http_upstream_srv_conf_t *us);
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66
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67
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68 typedef struct {
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69 ngx_http_upstream_init_pt init_upstream;
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70 ngx_http_upstream_init_peer_pt init;
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71 void *data;
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72 } ngx_http_upstream_peer_t;
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73
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58
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74
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75 typedef struct {
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260
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76 ngx_peer_addr_t *addrs;
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77 ngx_uint_t naddrs;
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78 ngx_uint_t weight;
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79 ngx_uint_t max_fails;
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80 time_t fail_timeout;
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81
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82 unsigned down:1;
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83 unsigned backup:1;
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84 } ngx_http_upstream_server_t;
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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 #define NGX_HTTP_UPSTREAM_CREATE 0x0001
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88 #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002
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89 #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004
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90 #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008
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91 #define NGX_HTTP_UPSTREAM_DOWN 0x0010
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92 #define NGX_HTTP_UPSTREAM_BACKUP 0x0020
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93
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200
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94
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260
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95 struct ngx_http_upstream_srv_conf_s {
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96 ngx_http_upstream_peer_t peer;
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97 void **srv_conf;
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98
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99 ngx_array_t *servers; /* ngx_http_upstream_server_t */
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100
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101 ngx_uint_t flags;
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200
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102 ngx_str_t host;
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336
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103 u_char *file_name;
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200
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104 ngx_uint_t line;
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105 in_port_t port;
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266
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106 in_port_t default_port;
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260
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107 };
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200
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108
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109
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110 typedef struct {
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260
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111 ngx_http_upstream_srv_conf_t *upstream;
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112
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113 ngx_msec_t connect_timeout;
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114 ngx_msec_t send_timeout;
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115 ngx_msec_t read_timeout;
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76
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116 ngx_msec_t timeout;
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117
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118 size_t send_lowat;
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130
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119 size_t buffer_size;
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78
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120
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58
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121 size_t busy_buffers_size;
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122 size_t max_temp_file_size;
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123 size_t temp_file_write_size;
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124
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78
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125 size_t busy_buffers_size_conf;
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126 size_t max_temp_file_size_conf;
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127 size_t temp_file_write_size_conf;
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128
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58
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129 ngx_uint_t next_upstream;
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320
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130 ngx_uint_t store_access;
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28
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131
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58
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132 ngx_bufs_t bufs;
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133
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130
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134 ngx_flag_t buffering;
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135 ngx_flag_t pass_request_headers;
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136 ngx_flag_t pass_request_body;
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137
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178
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138 ngx_flag_t ignore_client_abort;
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206
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139 ngx_flag_t intercept_errors;
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140 ngx_flag_t cyclic_temp_file;
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141
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198
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142 ngx_path_t *temp_path;
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143
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198
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144 ngx_hash_t hide_headers_hash;
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145 ngx_array_t *hide_headers;
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146 ngx_array_t *pass_headers;
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58
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147
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320
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148 ngx_array_t *store_lengths;
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149 ngx_array_t *store_values;
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150
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151 signed store:2;
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224
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152 unsigned intercept_404:1;
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198
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153 unsigned change_buffering:1;
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130
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154
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126
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155 #if (NGX_HTTP_SSL)
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156 ngx_ssl_t *ssl;
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398
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157 ngx_flag_t ssl_session_reuse;
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126
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158 #endif
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159
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160 } ngx_http_upstream_conf_t;
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161
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162
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58
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163 typedef struct {
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164 ngx_str_t name;
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165 ngx_http_header_handler_pt handler;
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166 ngx_uint_t offset;
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167 ngx_http_header_handler_pt copy_handler;
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168 ngx_uint_t conf;
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64
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169 ngx_uint_t redirect; /* unsigned redirect:1; */
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58
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170 } ngx_http_upstream_header_t;
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171
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172
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173 typedef struct {
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174 ngx_list_t headers;
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175
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78
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176 ngx_uint_t status_n;
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177 ngx_str_t status_line;
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178
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179 ngx_table_elt_t *status;
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180 ngx_table_elt_t *date;
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181 ngx_table_elt_t *server;
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182 ngx_table_elt_t *connection;
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183
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184 ngx_table_elt_t *expires;
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185 ngx_table_elt_t *etag;
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186 ngx_table_elt_t *x_accel_expires;
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64
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187 ngx_table_elt_t *x_accel_redirect;
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76
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188 ngx_table_elt_t *x_accel_limit_rate;
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58
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189
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190 ngx_table_elt_t *content_type;
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191 ngx_table_elt_t *content_length;
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192
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193 ngx_table_elt_t *last_modified;
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194 ngx_table_elt_t *location;
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195 ngx_table_elt_t *accept_ranges;
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196 ngx_table_elt_t *www_authenticate;
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197
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198 #if (NGX_HTTP_GZIP)
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199 ngx_table_elt_t *content_encoding;
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200 #endif
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201
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364
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202 off_t content_length_n;
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203
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204 ngx_array_t cache_control;
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205 } ngx_http_upstream_headers_in_t;
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206
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207
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348
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208 typedef struct {
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209 ngx_str_t host;
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210 in_port_t port;
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416
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211 ngx_uint_t no_port; /* unsigned no_port:1 */
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434
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212
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348
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213 ngx_uint_t naddrs;
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214 in_addr_t *addrs;
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434
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215
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216 struct sockaddr *sockaddr;
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217 socklen_t socklen;
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218
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348
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219 ngx_resolver_ctx_t *ctx;
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220 } ngx_http_upstream_resolved_t;
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221
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222
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430
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223 typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r,
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224 ngx_http_upstream_t *u);
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225
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226
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227 struct ngx_http_upstream_s {
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430
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228 ngx_http_upstream_handler_pt read_event_handler;
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229 ngx_http_upstream_handler_pt write_event_handler;
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426
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230
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231 ngx_peer_connection_t peer;
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232
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233 ngx_event_pipe_t *pipe;
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234
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235 ngx_chain_t *request_bufs;
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236
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237 ngx_output_chain_ctx_t output;
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238 ngx_chain_writer_ctx_t writer;
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239
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240 ngx_http_upstream_conf_t *conf;
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241
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242 ngx_http_upstream_headers_in_t headers_in;
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243
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348
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244 ngx_http_upstream_resolved_t *resolved;
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245
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130
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246 ngx_buf_t buffer;
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247 size_t length;
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248
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249 ngx_chain_t *out_bufs;
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250 ngx_chain_t *busy_bufs;
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251 ngx_chain_t *free_bufs;
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252
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253 ngx_int_t (*input_filter_init)(void *data);
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254 ngx_int_t (*input_filter)(void *data, ssize_t bytes);
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255 void *input_filter_ctx;
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256
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257 ngx_int_t (*create_request)(ngx_http_request_t *r);
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258 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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259 ngx_int_t (*process_header)(ngx_http_request_t *r);
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260 void (*abort_request)(ngx_http_request_t *r);
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261 void (*finalize_request)(ngx_http_request_t *r,
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262 ngx_int_t rc);
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263 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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264 ngx_table_elt_t *h, size_t prefix);
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265
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266 ngx_msec_t timeout;
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267
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268 ngx_http_upstream_state_t *state;
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269
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348
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270 ngx_str_t method;
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271 ngx_str_t schema;
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104
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272 ngx_str_t uri;
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273
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118
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274 ngx_http_cleanup_pt *cleanup;
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275
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318
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276 unsigned store:1;
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340
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277 unsigned cacheable:1;
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278 unsigned accel:1;
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348
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279 unsigned ssl:1;
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280
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198
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281 unsigned buffering:1;
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282
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283 unsigned request_sent:1;
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284 unsigned header_sent:1;
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285 };
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286
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287
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412
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288 typedef struct {
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289 ngx_uint_t status;
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290 ngx_uint_t mask;
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291 } ngx_http_upstream_next_t;
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292
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293
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296
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294 ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r,
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295 ngx_http_variable_value_t *v, uintptr_t data);
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296
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297 void ngx_http_upstream_init(ngx_http_request_t *r);
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200
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298 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf,
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260
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299 ngx_url_t *u, ngx_uint_t flags);
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356
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300 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf,
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301 ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev,
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302 ngx_str_t *default_hide_headers, ngx_hash_init_t *hash);
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260
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303
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304
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305 #define ngx_http_conf_upstream_srv_conf(uscf, module) \
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306 uscf->srv_conf[module.ctx_index]
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307
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308
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309 extern ngx_module_t ngx_http_upstream_module;
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310
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311
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312 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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