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479
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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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665
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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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27 #define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000
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479
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28
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29
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30 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40
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31
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32
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33 typedef struct {
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563
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34 ngx_msec_t bl_time;
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509
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35 ngx_uint_t bl_state;
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479
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36
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509
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37 ngx_uint_t status;
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563
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38 ngx_msec_t response_time;
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39
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509
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40 ngx_str_t *peer;
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479
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41 } ngx_http_upstream_state_t;
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42
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43
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44 typedef struct {
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649
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45 ngx_hash_t headers_in_hash;
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651
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46 ngx_array_t upstreams;
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884
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47 /* ngx_http_upstream_srv_conf_t */
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509
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48 } ngx_http_upstream_main_conf_t;
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49
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884
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50 typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t;
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51
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52 typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf,
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53 ngx_http_upstream_srv_conf_t *us);
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54 typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r,
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55 ngx_http_upstream_srv_conf_t *us);
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56
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57
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58 typedef struct {
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59 ngx_http_upstream_init_pt init_upstream;
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60 ngx_http_upstream_init_peer_pt init;
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61 void *data;
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62 } ngx_http_upstream_peer_t;
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63
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509
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64
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65 typedef struct {
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884
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66 ngx_peer_addr_t *addrs;
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67 ngx_uint_t naddrs;
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68 ngx_uint_t weight;
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69 ngx_uint_t max_fails;
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70 time_t fail_timeout;
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71
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72 unsigned down:1;
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73 unsigned backup:1;
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74 } ngx_http_upstream_server_t;
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75
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651
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76
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884
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77 #define NGX_HTTP_UPSTREAM_CREATE 0x0001
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78 #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002
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79 #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004
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80 #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008
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81 #define NGX_HTTP_UPSTREAM_DOWN 0x0010
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82 #define NGX_HTTP_UPSTREAM_BACKUP 0x0020
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83
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651
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84
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884
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85 struct ngx_http_upstream_srv_conf_s {
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86 ngx_http_upstream_peer_t peer;
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87 void **srv_conf;
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88
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89 ngx_array_t *servers; /* ngx_http_upstream_server_t */
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90
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91 ngx_uint_t flags;
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651
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92 ngx_str_t host;
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93 ngx_str_t file_name;
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94 ngx_uint_t line;
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95 in_port_t port;
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884
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96 };
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651
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97
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98
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99 typedef struct {
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884
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100 ngx_http_upstream_srv_conf_t *upstream;
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101
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509
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102 ngx_msec_t connect_timeout;
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103 ngx_msec_t send_timeout;
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104 ngx_msec_t read_timeout;
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527
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105 ngx_msec_t timeout;
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479
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106
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509
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107 size_t send_lowat;
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581
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108 size_t buffer_size;
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529
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109
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509
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110 size_t busy_buffers_size;
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111 size_t max_temp_file_size;
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112 size_t temp_file_write_size;
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113
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529
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114 size_t busy_buffers_size_conf;
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115 size_t max_temp_file_size_conf;
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116 size_t temp_file_write_size_conf;
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117
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509
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118 ngx_uint_t next_upstream;
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479
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119
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509
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120 ngx_bufs_t bufs;
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479
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121
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581
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122 ngx_flag_t buffering;
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509
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123 ngx_flag_t pass_request_headers;
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124 ngx_flag_t pass_request_body;
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125
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629
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126 ngx_flag_t ignore_client_abort;
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657
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127 ngx_flag_t intercept_errors;
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509
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128 ngx_flag_t cyclic_temp_file;
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479
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129
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649
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130 ngx_path_t *temp_path;
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479
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131
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649
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132 ngx_hash_t hide_headers_hash;
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133 ngx_array_t *hide_headers;
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134 ngx_array_t *pass_headers;
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509
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135
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136 ngx_str_t schema;
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137 ngx_str_t uri;
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573
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138 ngx_str_t location;
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509
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139 ngx_str_t url; /* used in proxy_rewrite_location */
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577
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140
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675
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141 unsigned intercept_404:1;
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649
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142 unsigned change_buffering:1;
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581
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143
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577
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144 #if (NGX_HTTP_SSL)
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145 ngx_ssl_t *ssl;
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146 #endif
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147
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479
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148 } ngx_http_upstream_conf_t;
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149
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150
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509
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151 typedef struct {
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152 ngx_str_t name;
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153 ngx_http_header_handler_pt handler;
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154 ngx_uint_t offset;
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155 ngx_http_header_handler_pt copy_handler;
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156 ngx_uint_t conf;
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515
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157 ngx_uint_t redirect; /* unsigned redirect:1; */
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509
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158 } ngx_http_upstream_header_t;
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159
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160
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161 typedef struct {
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162 ngx_list_t headers;
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163
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529
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164 ngx_uint_t status_n;
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165 ngx_str_t status_line;
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166
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509
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167 ngx_table_elt_t *status;
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168 ngx_table_elt_t *date;
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169 ngx_table_elt_t *server;
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170 ngx_table_elt_t *connection;
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171
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172 ngx_table_elt_t *expires;
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173 ngx_table_elt_t *etag;
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174 ngx_table_elt_t *x_accel_expires;
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515
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175 ngx_table_elt_t *x_accel_redirect;
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527
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176 ngx_table_elt_t *x_accel_limit_rate;
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509
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177
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178 ngx_table_elt_t *content_type;
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179 ngx_table_elt_t *content_length;
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180
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181 ngx_table_elt_t *last_modified;
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182 ngx_table_elt_t *location;
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183 ngx_table_elt_t *accept_ranges;
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529
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184 ngx_table_elt_t *www_authenticate;
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509
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185
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186 #if (NGX_HTTP_GZIP)
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187 ngx_table_elt_t *content_encoding;
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188 #endif
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189
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190 ngx_array_t cache_control;
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191 } ngx_http_upstream_headers_in_t;
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192
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479
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193
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194 struct ngx_http_upstream_s {
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509
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195 ngx_peer_connection_t peer;
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196
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197 ngx_event_pipe_t *pipe;
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198
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509
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199 ngx_chain_t *request_bufs;
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200
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509
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201 ngx_output_chain_ctx_t output;
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202 ngx_chain_writer_ctx_t writer;
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203
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509
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204 ngx_http_upstream_conf_t *conf;
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205
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206 ngx_http_upstream_headers_in_t headers_in;
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207
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581
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208 ngx_buf_t buffer;
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209 size_t length;
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210
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211 ngx_chain_t *out_bufs;
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212 ngx_chain_t *busy_bufs;
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213 ngx_chain_t *free_bufs;
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214
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215 ngx_int_t (*input_filter_init)(void *data);
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216 ngx_int_t (*input_filter)(void *data, ssize_t bytes);
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217 void *input_filter_ctx;
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218
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509
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219 ngx_int_t (*create_request)(ngx_http_request_t *r);
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220 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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221 ngx_int_t (*process_header)(ngx_http_request_t *r);
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222 void (*abort_request)(ngx_http_request_t *r);
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223 void (*finalize_request)(ngx_http_request_t *r,
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224 ngx_int_t rc);
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225 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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226 ngx_table_elt_t *h, size_t prefix);
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227
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527
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228 ngx_msec_t timeout;
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229
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561
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230 ngx_str_t method;
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231
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509
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232 ngx_http_upstream_state_t *state;
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233 ngx_array_t states; /* of ngx_http_upstream_state_t */
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234
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555
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235 ngx_str_t uri;
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236
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569
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237 ngx_http_cleanup_pt *cleanup;
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238
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239 unsigned cachable:1;
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240 unsigned accel:1;
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241
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242 unsigned buffering:1;
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243
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244 unsigned request_sent:1;
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245 unsigned header_sent:1;
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479
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246 };
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247
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248
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249 void ngx_http_upstream_init(ngx_http_request_t *r);
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250 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf,
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251 ngx_url_t *u, ngx_uint_t flags);
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252
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253
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254 #define ngx_http_conf_upstream_srv_conf(uscf, module) \
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255 uscf->srv_conf[module.ctx_index]
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256
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257
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258 extern ngx_module_t ngx_http_upstream_module;
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259
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260
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261 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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