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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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484
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41 #define NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT 0x00000002
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42 #define NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES 0x00000004
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43 #define NGX_HTTP_UPSTREAM_IGN_EXPIRES 0x00000008
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44 #define NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL 0x00000010
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45
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46
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28
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47 typedef struct {
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464
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48 ngx_msec_t bl_time;
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49 ngx_uint_t bl_state;
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28
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50
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464
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51 ngx_uint_t status;
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52 time_t response_sec;
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53 ngx_uint_t response_msec;
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430
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54 off_t response_length;
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112
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55
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464
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56 ngx_str_t *peer;
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28
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57 } ngx_http_upstream_state_t;
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58
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59
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60 typedef struct {
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464
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61 ngx_hash_t headers_in_hash;
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62 ngx_array_t upstreams;
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260
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63 /* ngx_http_upstream_srv_conf_t */
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58
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64 } ngx_http_upstream_main_conf_t;
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65
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260
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66 typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t;
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67
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68 typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf,
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69 ngx_http_upstream_srv_conf_t *us);
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70 typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r,
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71 ngx_http_upstream_srv_conf_t *us);
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72
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73
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74 typedef struct {
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464
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75 ngx_http_upstream_init_pt init_upstream;
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76 ngx_http_upstream_init_peer_pt init;
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77 void *data;
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260
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78 } ngx_http_upstream_peer_t;
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79
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58
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80
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81 typedef struct {
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464
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82 ngx_peer_addr_t *addrs;
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83 ngx_uint_t naddrs;
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84 ngx_uint_t weight;
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85 ngx_uint_t max_fails;
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86 time_t fail_timeout;
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260
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87
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464
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88 unsigned down:1;
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89 unsigned backup:1;
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260
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90 } ngx_http_upstream_server_t;
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91
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200
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92
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260
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93 #define NGX_HTTP_UPSTREAM_CREATE 0x0001
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94 #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002
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95 #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004
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96 #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008
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97 #define NGX_HTTP_UPSTREAM_DOWN 0x0010
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98 #define NGX_HTTP_UPSTREAM_BACKUP 0x0020
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99
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200
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100
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260
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101 struct ngx_http_upstream_srv_conf_s {
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464
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102 ngx_http_upstream_peer_t peer;
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103 void **srv_conf;
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260
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104
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464
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105 ngx_array_t *servers; /* ngx_http_upstream_server_t */
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260
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106
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464
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107 ngx_uint_t flags;
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108 ngx_str_t host;
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109 u_char *file_name;
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110 ngx_uint_t line;
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111 in_port_t port;
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112 in_port_t default_port;
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260
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113 };
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200
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114
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115
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116 typedef struct {
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117 ngx_http_upstream_srv_conf_t *upstream;
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260
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118
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464
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119 ngx_msec_t connect_timeout;
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120 ngx_msec_t send_timeout;
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121 ngx_msec_t read_timeout;
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122 ngx_msec_t timeout;
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123
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464
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124 size_t send_lowat;
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125 size_t buffer_size;
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78
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126
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127 size_t busy_buffers_size;
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128 size_t max_temp_file_size;
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129 size_t temp_file_write_size;
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130
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131 size_t busy_buffers_size_conf;
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132 size_t max_temp_file_size_conf;
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133 size_t temp_file_write_size_conf;
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134
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135 ngx_bufs_t bufs;
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78
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136
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137 ngx_uint_t ignore_headers;
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464
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138 ngx_uint_t next_upstream;
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139 ngx_uint_t store_access;
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140 ngx_flag_t buffering;
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141 ngx_flag_t pass_request_headers;
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142 ngx_flag_t pass_request_body;
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143
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464
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144 ngx_flag_t ignore_client_abort;
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145 ngx_flag_t intercept_errors;
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146 ngx_flag_t cyclic_temp_file;
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147
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148 ngx_path_t *temp_path;
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149
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464
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150 ngx_hash_t hide_headers_hash;
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151 ngx_array_t *hide_headers;
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152 ngx_array_t *pass_headers;
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153
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464
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154 #if (NGX_HTTP_CACHE)
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155 ngx_shm_zone_t *cache;
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156
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464
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157 ngx_uint_t cache_min_uses;
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158 ngx_uint_t cache_use_stale;
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159
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160 ngx_array_t *cache_valid;
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161 #endif
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162
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163 ngx_array_t *store_lengths;
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164 ngx_array_t *store_values;
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320
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165
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464
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166 signed store:2;
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167 unsigned intercept_404:1;
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168 unsigned change_buffering:1;
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130
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169
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126
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170 #if (NGX_HTTP_SSL)
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171 ngx_ssl_t *ssl;
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482
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172 ngx_flag_t ssl_session_reuse;
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173 #endif
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174
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175 } ngx_http_upstream_conf_t;
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176
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177
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178 typedef struct {
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464
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179 ngx_str_t name;
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180 ngx_http_header_handler_pt handler;
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181 ngx_uint_t offset;
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182 ngx_http_header_handler_pt copy_handler;
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183 ngx_uint_t conf;
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184 ngx_uint_t redirect; /* unsigned redirect:1; */
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58
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185 } ngx_http_upstream_header_t;
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186
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187
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188 typedef struct {
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464
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189 ngx_list_t headers;
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190
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464
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191 ngx_uint_t status_n;
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192 ngx_str_t status_line;
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193
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464
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194 ngx_table_elt_t *status;
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195 ngx_table_elt_t *date;
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196 ngx_table_elt_t *server;
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197 ngx_table_elt_t *connection;
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198
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464
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199 ngx_table_elt_t *expires;
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200 ngx_table_elt_t *etag;
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201 ngx_table_elt_t *x_accel_expires;
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202 ngx_table_elt_t *x_accel_redirect;
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203 ngx_table_elt_t *x_accel_limit_rate;
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204
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205 ngx_table_elt_t *content_type;
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206 ngx_table_elt_t *content_length;
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207
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208 ngx_table_elt_t *last_modified;
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209 ngx_table_elt_t *location;
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210 ngx_table_elt_t *accept_ranges;
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211 ngx_table_elt_t *www_authenticate;
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212
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213 #if (NGX_HTTP_GZIP)
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214 ngx_table_elt_t *content_encoding;
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215 #endif
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216
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217 off_t content_length_n;
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364
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218
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219 ngx_array_t cache_control;
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58
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220 } ngx_http_upstream_headers_in_t;
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221
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222
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348
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223 typedef struct {
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464
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224 ngx_str_t host;
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225 in_port_t port;
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226 ngx_uint_t no_port; /* unsigned no_port:1 */
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434
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227
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228 ngx_uint_t naddrs;
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229 in_addr_t *addrs;
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434
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230
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231 struct sockaddr *sockaddr;
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232 socklen_t socklen;
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434
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233
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234 ngx_resolver_ctx_t *ctx;
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348
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235 } ngx_http_upstream_resolved_t;
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236
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237
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430
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238 typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r,
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239 ngx_http_upstream_t *u);
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240
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241
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242 struct ngx_http_upstream_s {
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243 ngx_http_upstream_handler_pt read_event_handler;
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244 ngx_http_upstream_handler_pt write_event_handler;
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426
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245
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246 ngx_peer_connection_t peer;
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247
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248 ngx_event_pipe_t *pipe;
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249
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250 ngx_chain_t *request_bufs;
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251
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252 ngx_output_chain_ctx_t output;
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253 ngx_chain_writer_ctx_t writer;
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254
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255 ngx_http_upstream_conf_t *conf;
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256
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464
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257 ngx_http_upstream_headers_in_t headers_in;
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258
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259 ngx_http_upstream_resolved_t *resolved;
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348
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260
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261 ngx_buf_t buffer;
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262 size_t length;
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263
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264 ngx_chain_t *out_bufs;
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265 ngx_chain_t *busy_bufs;
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266 ngx_chain_t *free_bufs;
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267
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464
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268 ngx_int_t (*input_filter_init)(void *data);
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269 ngx_int_t (*input_filter)(void *data, ssize_t bytes);
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270 void *input_filter_ctx;
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271
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272 #if (NGX_HTTP_CACHE)
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273 ngx_int_t (*create_key)(ngx_http_request_t *r);
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274 #endif
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275 ngx_int_t (*create_request)(ngx_http_request_t *r);
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276 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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277 ngx_int_t (*process_header)(ngx_http_request_t *r);
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278 void (*abort_request)(ngx_http_request_t *r);
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279 void (*finalize_request)(ngx_http_request_t *r,
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280 ngx_int_t rc);
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281 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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282 ngx_table_elt_t *h, size_t prefix);
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283
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284 ngx_msec_t timeout;
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76
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285
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286 ngx_http_upstream_state_t *state;
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287
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288 ngx_str_t method;
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289 ngx_str_t schema;
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290 ngx_str_t uri;
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291
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292 ngx_http_cleanup_pt *cleanup;
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293
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464
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294 unsigned store:1;
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295 unsigned cacheable:1;
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296 unsigned accel:1;
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297 unsigned ssl:1;
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298 #if (NGX_HTTP_CACHE)
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299 unsigned stale_cache:1;
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300 #endif
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301
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464
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302 unsigned buffering:1;
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303
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464
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304 unsigned request_sent:1;
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305 unsigned header_sent:1;
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306 };
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307
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308
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412
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309 typedef struct {
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310 ngx_uint_t status;
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311 ngx_uint_t mask;
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312 } ngx_http_upstream_next_t;
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313
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314
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296
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315 ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r,
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316 ngx_http_variable_value_t *v, uintptr_t data);
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317
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318 void ngx_http_upstream_init(ngx_http_request_t *r);
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200
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319 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf,
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260
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320 ngx_url_t *u, ngx_uint_t flags);
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356
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321 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf,
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322 ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev,
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323 ngx_str_t *default_hide_headers, ngx_hash_init_t *hash);
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260
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324
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325
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326 #define ngx_http_conf_upstream_srv_conf(uscf, module) \
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327 uscf->srv_conf[module.ctx_index]
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328
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329
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330 extern ngx_module_t ngx_http_upstream_module;
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331
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332
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333 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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