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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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498
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27 #define NGX_HTTP_UPSTREAM_FT_UPDATING 0x00000200
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28 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00000400
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29 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00000800
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326
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30 #define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000
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214
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31 #define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000
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28
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32
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412
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33 #define NGX_HTTP_UPSTREAM_FT_STATUS (NGX_HTTP_UPSTREAM_FT_HTTP_500 \
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34 |NGX_HTTP_UPSTREAM_FT_HTTP_502 \
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35 |NGX_HTTP_UPSTREAM_FT_HTTP_503 \
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36 |NGX_HTTP_UPSTREAM_FT_HTTP_504 \
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37 |NGX_HTTP_UPSTREAM_FT_HTTP_404)
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28
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38
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39 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40
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40
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41
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484
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42 #define NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT 0x00000002
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43 #define NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES 0x00000004
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44 #define NGX_HTTP_UPSTREAM_IGN_EXPIRES 0x00000008
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45 #define NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL 0x00000010
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584
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46 #define NGX_HTTP_UPSTREAM_IGN_SET_COOKIE 0x00000020
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644
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47 #define NGX_HTTP_UPSTREAM_IGN_XA_LIMIT_RATE 0x00000040
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48 #define NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING 0x00000080
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49 #define NGX_HTTP_UPSTREAM_IGN_XA_CHARSET 0x00000100
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484
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50
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51
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28
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52 typedef struct {
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464
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53 ngx_msec_t bl_time;
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54 ngx_uint_t bl_state;
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28
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55
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464
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56 ngx_uint_t status;
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57 time_t response_sec;
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58 ngx_uint_t response_msec;
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604
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59 off_t response_length;
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112
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60
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464
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61 ngx_str_t *peer;
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28
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62 } ngx_http_upstream_state_t;
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63
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64
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65 typedef struct {
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464
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66 ngx_hash_t headers_in_hash;
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67 ngx_array_t upstreams;
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260
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68 /* ngx_http_upstream_srv_conf_t */
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58
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69 } ngx_http_upstream_main_conf_t;
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70
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260
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71 typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t;
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72
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73 typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf,
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74 ngx_http_upstream_srv_conf_t *us);
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75 typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r,
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76 ngx_http_upstream_srv_conf_t *us);
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77
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78
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79 typedef struct {
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464
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80 ngx_http_upstream_init_pt init_upstream;
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81 ngx_http_upstream_init_peer_pt init;
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82 void *data;
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260
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83 } ngx_http_upstream_peer_t;
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84
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58
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85
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86 typedef struct {
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540
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87 ngx_addr_t *addrs;
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464
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88 ngx_uint_t naddrs;
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89 ngx_uint_t weight;
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90 ngx_uint_t max_fails;
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91 time_t fail_timeout;
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260
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92
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464
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93 unsigned down:1;
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94 unsigned backup:1;
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260
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95 } ngx_http_upstream_server_t;
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96
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200
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97
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260
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98 #define NGX_HTTP_UPSTREAM_CREATE 0x0001
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99 #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002
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100 #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004
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101 #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008
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102 #define NGX_HTTP_UPSTREAM_DOWN 0x0010
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103 #define NGX_HTTP_UPSTREAM_BACKUP 0x0020
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104
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200
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105
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260
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106 struct ngx_http_upstream_srv_conf_s {
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464
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107 ngx_http_upstream_peer_t peer;
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108 void **srv_conf;
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260
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109
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464
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110 ngx_array_t *servers; /* ngx_http_upstream_server_t */
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260
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111
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464
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112 ngx_uint_t flags;
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113 ngx_str_t host;
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114 u_char *file_name;
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115 ngx_uint_t line;
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116 in_port_t port;
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117 in_port_t default_port;
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260
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118 };
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200
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119
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120
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121 typedef struct {
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464
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122 ngx_http_upstream_srv_conf_t *upstream;
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260
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123
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464
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124 ngx_msec_t connect_timeout;
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125 ngx_msec_t send_timeout;
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126 ngx_msec_t read_timeout;
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127 ngx_msec_t timeout;
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28
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128
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464
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129 size_t send_lowat;
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130 size_t buffer_size;
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78
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131
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464
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132 size_t busy_buffers_size;
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133 size_t max_temp_file_size;
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134 size_t temp_file_write_size;
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135
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136 size_t busy_buffers_size_conf;
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137 size_t max_temp_file_size_conf;
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138 size_t temp_file_write_size_conf;
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58
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139
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464
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140 ngx_bufs_t bufs;
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78
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141
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484
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142 ngx_uint_t ignore_headers;
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464
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143 ngx_uint_t next_upstream;
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144 ngx_uint_t store_access;
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145 ngx_flag_t buffering;
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146 ngx_flag_t pass_request_headers;
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147 ngx_flag_t pass_request_body;
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28
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148
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464
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149 ngx_flag_t ignore_client_abort;
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150 ngx_flag_t intercept_errors;
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151 ngx_flag_t cyclic_temp_file;
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152
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153 ngx_path_t *temp_path;
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28
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154
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464
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155 ngx_hash_t hide_headers_hash;
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156 ngx_array_t *hide_headers;
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157 ngx_array_t *pass_headers;
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58
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158
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540
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159 ngx_addr_t *local;
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160
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464
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161 #if (NGX_HTTP_CACHE)
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162 ngx_shm_zone_t *cache;
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28
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163
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464
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164 ngx_uint_t cache_min_uses;
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165 ngx_uint_t cache_use_stale;
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494
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166 ngx_uint_t cache_methods;
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28
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167
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464
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168 ngx_array_t *cache_valid;
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588
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169 ngx_array_t *cache_bypass;
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170 ngx_array_t *no_cache;
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464
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171 #endif
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58
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172
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464
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173 ngx_array_t *store_lengths;
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174 ngx_array_t *store_values;
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320
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175
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464
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176 signed store:2;
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177 unsigned intercept_404:1;
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178 unsigned change_buffering:1;
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130
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179
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126
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180 #if (NGX_HTTP_SSL)
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464
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181 ngx_ssl_t *ssl;
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482
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182 ngx_flag_t ssl_session_reuse;
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126
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183 #endif
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184
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632
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185 ngx_str_t module;
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28
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186 } ngx_http_upstream_conf_t;
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187
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188
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58
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189 typedef struct {
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464
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190 ngx_str_t name;
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191 ngx_http_header_handler_pt handler;
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192 ngx_uint_t offset;
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193 ngx_http_header_handler_pt copy_handler;
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194 ngx_uint_t conf;
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195 ngx_uint_t redirect; /* unsigned redirect:1; */
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58
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196 } ngx_http_upstream_header_t;
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197
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198
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199 typedef struct {
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464
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200 ngx_list_t headers;
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58
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201
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464
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202 ngx_uint_t status_n;
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203 ngx_str_t status_line;
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204
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464
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205 ngx_table_elt_t *status;
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206 ngx_table_elt_t *date;
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207 ngx_table_elt_t *server;
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208 ngx_table_elt_t *connection;
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58
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209
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464
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210 ngx_table_elt_t *expires;
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211 ngx_table_elt_t *etag;
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212 ngx_table_elt_t *x_accel_expires;
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213 ngx_table_elt_t *x_accel_redirect;
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214 ngx_table_elt_t *x_accel_limit_rate;
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58
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215
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464
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216 ngx_table_elt_t *content_type;
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217 ngx_table_elt_t *content_length;
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58
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218
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464
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219 ngx_table_elt_t *last_modified;
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220 ngx_table_elt_t *location;
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221 ngx_table_elt_t *accept_ranges;
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222 ngx_table_elt_t *www_authenticate;
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640
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223 ngx_table_elt_t *transfer_encoding;
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58
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224
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225 #if (NGX_HTTP_GZIP)
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464
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226 ngx_table_elt_t *content_encoding;
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58
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227 #endif
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228
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464
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229 off_t content_length_n;
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364
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230
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464
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231 ngx_array_t cache_control;
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640
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232
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233 unsigned connection_close:1;
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234 unsigned chunked:1;
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58
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235 } ngx_http_upstream_headers_in_t;
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236
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28
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237
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348
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238 typedef struct {
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464
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239 ngx_str_t host;
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240 in_port_t port;
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241 ngx_uint_t no_port; /* unsigned no_port:1 */
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434
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242
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464
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243 ngx_uint_t naddrs;
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244 in_addr_t *addrs;
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434
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245
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464
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246 struct sockaddr *sockaddr;
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247 socklen_t socklen;
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434
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248
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464
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249 ngx_resolver_ctx_t *ctx;
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348
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250 } ngx_http_upstream_resolved_t;
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251
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252
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430
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253 typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r,
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254 ngx_http_upstream_t *u);
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255
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256
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28
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257 struct ngx_http_upstream_s {
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464
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258 ngx_http_upstream_handler_pt read_event_handler;
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259 ngx_http_upstream_handler_pt write_event_handler;
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426
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260
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464
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261 ngx_peer_connection_t peer;
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262
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464
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263 ngx_event_pipe_t *pipe;
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264
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464
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265 ngx_chain_t *request_bufs;
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28
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266
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464
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267 ngx_output_chain_ctx_t output;
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268 ngx_chain_writer_ctx_t writer;
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28
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269
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464
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270 ngx_http_upstream_conf_t *conf;
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271
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464
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272 ngx_http_upstream_headers_in_t headers_in;
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58
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273
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464
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274 ngx_http_upstream_resolved_t *resolved;
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348
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275
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464
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276 ngx_buf_t buffer;
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640
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277 off_t length;
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130
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278
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464
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279 ngx_chain_t *out_bufs;
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280 ngx_chain_t *busy_bufs;
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281 ngx_chain_t *free_bufs;
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130
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282
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464
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283 ngx_int_t (*input_filter_init)(void *data);
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284 ngx_int_t (*input_filter)(void *data, ssize_t bytes);
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285 void *input_filter_ctx;
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286
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464
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287 #if (NGX_HTTP_CACHE)
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288 ngx_int_t (*create_key)(ngx_http_request_t *r);
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289 #endif
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290 ngx_int_t (*create_request)(ngx_http_request_t *r);
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291 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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292 ngx_int_t (*process_header)(ngx_http_request_t *r);
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293 void (*abort_request)(ngx_http_request_t *r);
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294 void (*finalize_request)(ngx_http_request_t *r,
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295 ngx_int_t rc);
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296 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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297 ngx_table_elt_t *h, size_t prefix);
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28
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298
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464
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299 ngx_msec_t timeout;
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76
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300
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464
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301 ngx_http_upstream_state_t *state;
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28
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302
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464
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303 ngx_str_t method;
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304 ngx_str_t schema;
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305 ngx_str_t uri;
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104
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306
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464
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307 ngx_http_cleanup_pt *cleanup;
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118
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308
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464
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309 unsigned store:1;
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310 unsigned cacheable:1;
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311 unsigned accel:1;
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312 unsigned ssl:1;
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313 #if (NGX_HTTP_CACHE)
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502
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314 unsigned cache_status:3;
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464
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315 #endif
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316
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464
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317 unsigned buffering:1;
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640
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318 unsigned keepalive:1;
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198
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319
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464
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320 unsigned request_sent:1;
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321 unsigned header_sent:1;
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28
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322 };
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323
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324
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412
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325 typedef struct {
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326 ngx_uint_t status;
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327 ngx_uint_t mask;
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328 } ngx_http_upstream_next_t;
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329
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330
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654
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331 typedef struct {
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332 ngx_str_t key;
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333 ngx_str_t value;
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334 ngx_uint_t skip_empty;
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335 } ngx_http_upstream_param_t;
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336
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337
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296
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338 ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r,
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339 ngx_http_variable_value_t *v, uintptr_t data);
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340
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510
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341 ngx_int_t ngx_http_upstream_create(ngx_http_request_t *r);
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28
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342 void ngx_http_upstream_init(ngx_http_request_t *r);
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200
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343 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf,
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260
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344 ngx_url_t *u, ngx_uint_t flags);
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558
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345 char *ngx_http_upstream_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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540
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346 void *conf);
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654
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347 char *ngx_http_upstream_param_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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348 void *conf);
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356
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349 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf,
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350 ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev,
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351 ngx_str_t *default_hide_headers, ngx_hash_init_t *hash);
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260
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352
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353
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354 #define ngx_http_conf_upstream_srv_conf(uscf, module) \
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355 uscf->srv_conf[module.ctx_index]
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58
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356
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28
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357
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494
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358 extern ngx_module_t ngx_http_upstream_module;
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359 extern ngx_conf_bitmask_t ngx_http_upstream_cache_method_mask[];
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584
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360 extern ngx_conf_bitmask_t ngx_http_upstream_ignore_headers_masks[];
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494
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361
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28
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362
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363 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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