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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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623
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19 #define NGX_HTTP_UPSTREAM_FT_ERROR 0x002
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20 #define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x004
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21 #define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x008
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22 #define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x010
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23 #define NGX_HTTP_UPSTREAM_FT_HTTP_503 0x020
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24 #define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x040
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25 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x080
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26 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x100
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479
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27
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28
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29 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40
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30
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31
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32 typedef struct {
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563
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33 ngx_msec_t bl_time;
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509
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34 ngx_uint_t bl_state;
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479
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35
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509
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36 ngx_uint_t status;
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563
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37 ngx_msec_t response_time;
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38
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509
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39 ngx_str_t *peer;
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479
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40 } ngx_http_upstream_state_t;
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41
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42
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43 typedef struct {
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649
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44 ngx_hash_t headers_in_hash;
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651
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45 ngx_array_t upstreams;
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46 /* ngx_http_upstream_srv_conf_t */
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509
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47 } ngx_http_upstream_main_conf_t;
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48
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49
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50 typedef struct {
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651
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51 ngx_peers_t *peers;
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52
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53 ngx_array_t *servers;
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54
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55 ngx_str_t host;
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56 ngx_str_t file_name;
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57 ngx_uint_t line;
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58 in_port_t port;
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59
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60 ngx_uint_t balanced; /* unsigned balanced:1; */
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61 } ngx_http_upstream_srv_conf_t;
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62
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63
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64 typedef struct {
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509
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65 ngx_msec_t connect_timeout;
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66 ngx_msec_t send_timeout;
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67 ngx_msec_t read_timeout;
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527
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68 ngx_msec_t timeout;
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479
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69
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509
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70 size_t send_lowat;
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581
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71 size_t buffer_size;
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529
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72
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509
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73 size_t busy_buffers_size;
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74 size_t max_temp_file_size;
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75 size_t temp_file_write_size;
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76
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529
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77 size_t busy_buffers_size_conf;
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78 size_t max_temp_file_size_conf;
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79 size_t temp_file_write_size_conf;
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80
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509
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81 ngx_uint_t next_upstream;
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561
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82 ngx_uint_t max_fails;
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83
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84 time_t fail_timeout;
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479
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85
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509
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86 ngx_bufs_t bufs;
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479
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87
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581
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88 ngx_flag_t buffering;
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509
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89 ngx_flag_t pass_request_headers;
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90 ngx_flag_t pass_request_body;
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91
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629
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92 ngx_flag_t ignore_client_abort;
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657
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93 ngx_flag_t intercept_errors;
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509
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94 ngx_flag_t cyclic_temp_file;
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479
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95
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649
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96 ngx_path_t *temp_path;
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479
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97
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649
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98 ngx_hash_t hide_headers_hash;
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99 ngx_array_t *hide_headers;
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100 ngx_array_t *pass_headers;
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509
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101
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102 ngx_str_t schema;
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103 ngx_str_t uri;
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573
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104 ngx_str_t location;
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509
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105 ngx_str_t url; /* used in proxy_rewrite_location */
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577
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106
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649
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107 unsigned redirect_404:1;
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108 unsigned change_buffering:1;
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581
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109
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577
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110 #if (NGX_HTTP_SSL)
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111 ngx_ssl_t *ssl;
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112 #endif
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113
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479
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114 } ngx_http_upstream_conf_t;
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115
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116
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509
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117 typedef struct {
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118 ngx_str_t name;
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119 ngx_http_header_handler_pt handler;
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120 ngx_uint_t offset;
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121 ngx_http_header_handler_pt copy_handler;
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122 ngx_uint_t conf;
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515
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123 ngx_uint_t redirect; /* unsigned redirect:1; */
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509
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124 } ngx_http_upstream_header_t;
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125
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126
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127 typedef struct {
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128 ngx_list_t headers;
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129
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529
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130 ngx_uint_t status_n;
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131 ngx_str_t status_line;
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132
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509
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133 ngx_table_elt_t *status;
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134 ngx_table_elt_t *date;
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135 ngx_table_elt_t *server;
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136 ngx_table_elt_t *connection;
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137
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138 ngx_table_elt_t *expires;
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139 ngx_table_elt_t *etag;
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140 ngx_table_elt_t *x_accel_expires;
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515
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141 ngx_table_elt_t *x_accel_redirect;
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527
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142 ngx_table_elt_t *x_accel_limit_rate;
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509
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143
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144 ngx_table_elt_t *content_type;
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145 ngx_table_elt_t *content_length;
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146
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147 ngx_table_elt_t *last_modified;
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148 ngx_table_elt_t *location;
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149 ngx_table_elt_t *accept_ranges;
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529
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150 ngx_table_elt_t *www_authenticate;
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509
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151
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152 #if (NGX_HTTP_GZIP)
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153 ngx_table_elt_t *content_encoding;
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154 #endif
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155
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156 ngx_array_t cache_control;
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157 } ngx_http_upstream_headers_in_t;
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158
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479
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159
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160 struct ngx_http_upstream_s {
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509
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161 ngx_peer_connection_t peer;
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479
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162
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581
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163 ngx_event_pipe_t *pipe;
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479
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164
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509
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165 ngx_chain_t *request_bufs;
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479
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166
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509
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167 ngx_output_chain_ctx_t output;
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168 ngx_chain_writer_ctx_t writer;
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479
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169
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509
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170 ngx_http_upstream_conf_t *conf;
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479
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171
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509
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172 ngx_http_upstream_headers_in_t headers_in;
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173
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581
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174 ngx_buf_t buffer;
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175 size_t length;
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176
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177 ngx_chain_t *out_bufs;
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178 ngx_chain_t *busy_bufs;
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179 ngx_chain_t *free_bufs;
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180
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181 ngx_int_t (*input_filter_init)(void *data);
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182 ngx_int_t (*input_filter)(void *data, ssize_t bytes);
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183 void *input_filter_ctx;
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479
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184
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509
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185 ngx_int_t (*create_request)(ngx_http_request_t *r);
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186 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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187 ngx_int_t (*process_header)(ngx_http_request_t *r);
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188 void (*abort_request)(ngx_http_request_t *r);
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189 void (*finalize_request)(ngx_http_request_t *r,
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190 ngx_int_t rc);
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191 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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192 ngx_table_elt_t *h, size_t prefix);
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479
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193
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527
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194 ngx_msec_t timeout;
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195
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561
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196 ngx_str_t method;
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479
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197
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509
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198 ngx_http_log_handler_pt saved_log_handler;
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199
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200 ngx_http_upstream_state_t *state;
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201 ngx_array_t states; /* of ngx_http_upstream_state_t */
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479
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202
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555
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203 ngx_str_t uri;
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204
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569
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205 ngx_http_cleanup_pt *cleanup;
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206
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509
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207 unsigned cachable:1;
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208 unsigned accel:1;
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479
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209
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649
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210 unsigned buffering:1;
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211
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509
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212 unsigned request_sent:1;
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213 unsigned header_sent:1;
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479
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214 };
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215
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216
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217 void ngx_http_upstream_init(ngx_http_request_t *r);
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651
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218 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf,
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219 ngx_url_t *u);
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509
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220
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479
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221
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509
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222 extern ngx_module_t ngx_http_upstream_module;
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223
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224
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225 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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