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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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19 #define NGX_HTTP_UPSTREAM_FT_ERROR 0x02
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20 #define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x04
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21 #define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x08
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22 #define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x10
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23 #define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x20
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24 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x40
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25 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x80
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26
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27
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28 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40
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29
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30
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31 typedef struct {
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58
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32 time_t bl_time;
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33 ngx_uint_t bl_state;
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28
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34
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58
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35 ngx_uint_t status;
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36 time_t time;
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28
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37
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58
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38 ngx_str_t *peer;
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28
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39 } ngx_http_upstream_state_t;
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40
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41
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42 typedef struct {
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58
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43 ngx_hash_t headers_in_hash;
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44 } ngx_http_upstream_main_conf_t;
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45
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46
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47 typedef struct {
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48 ngx_msec_t connect_timeout;
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49 ngx_msec_t send_timeout;
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50 ngx_msec_t read_timeout;
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51
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52 size_t send_lowat;
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53 size_t header_buffer_size;
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54 size_t busy_buffers_size;
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55 size_t max_temp_file_size;
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56 size_t temp_file_write_size;
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57
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58 ngx_uint_t next_upstream;
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59 ngx_uint_t method;
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60
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58
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61 ngx_bufs_t bufs;
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62
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63 ngx_flag_t pass_request_headers;
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64 ngx_flag_t pass_request_body;
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65
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66 ngx_flag_t redirect_errors;
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67 ngx_flag_t pass_unparsed_uri;
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68 ngx_flag_t cyclic_temp_file;
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69
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70 ngx_flag_t pass_x_powered_by;
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71 ngx_flag_t pass_server;
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72 ngx_flag_t pass_date;
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73 ngx_flag_t pass_x_accel_expires;
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74
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75 ngx_path_t *temp_path;
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76
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77 ngx_str_t schema;
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78 ngx_str_t uri;
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79 ngx_str_t *location;
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80 ngx_str_t url; /* used in proxy_rewrite_location */
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81 } ngx_http_upstream_conf_t;
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82
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83
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58
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84 typedef struct {
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85 ngx_str_t name;
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86 ngx_http_header_handler_pt handler;
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87 ngx_uint_t offset;
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88 ngx_http_header_handler_pt copy_handler;
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89 ngx_uint_t conf;
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64
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90 ngx_uint_t redirect; /* unsigned redirect:1; */
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58
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91 } ngx_http_upstream_header_t;
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92
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93
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94 typedef struct {
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95 ngx_list_t headers;
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96
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97 ngx_table_elt_t *status;
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98 ngx_table_elt_t *date;
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99 ngx_table_elt_t *server;
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100 ngx_table_elt_t *connection;
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101
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102 ngx_table_elt_t *expires;
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103 ngx_table_elt_t *etag;
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104 ngx_table_elt_t *x_accel_expires;
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105 ngx_table_elt_t *x_accel_redirect;
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106
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107 ngx_table_elt_t *content_type;
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108 ngx_table_elt_t *content_length;
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109
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110 ngx_table_elt_t *last_modified;
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111 ngx_table_elt_t *location;
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112 ngx_table_elt_t *accept_ranges;
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113
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114 #if (NGX_HTTP_GZIP)
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115 ngx_table_elt_t *content_encoding;
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116 #endif
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117
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118 ngx_array_t cache_control;
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119 } ngx_http_upstream_headers_in_t;
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120
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121
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122 struct ngx_http_upstream_s {
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123 ngx_http_request_t *request;
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124
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125 ngx_peer_connection_t peer;
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126
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127 ngx_event_pipe_t pipe;
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128
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129 ngx_chain_t *request_bufs;
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130
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131 ngx_output_chain_ctx_t output;
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132 ngx_chain_writer_ctx_t writer;
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133
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134 ngx_http_upstream_conf_t *conf;
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135
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136 ngx_http_upstream_headers_in_t headers_in;
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137
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138 ngx_buf_t header_in;
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139
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140 ngx_int_t (*create_request)(ngx_http_request_t *r);
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141 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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142 ngx_int_t (*process_header)(ngx_http_request_t *r);
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143 void (*abort_request)(ngx_http_request_t *r);
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144 void (*finalize_request)(ngx_http_request_t *r,
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145 ngx_int_t rc);
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146 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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147 ngx_table_elt_t *h, size_t prefix);
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148
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58
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149 ngx_uint_t method;
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150
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58
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151 ngx_http_log_handler_pt saved_log_handler;
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152
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153 ngx_http_upstream_state_t *state;
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154 ngx_array_t states; /* of ngx_http_upstream_state_t */
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155
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58
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156 unsigned cachable:1;
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157 unsigned accel:1;
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158
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159 unsigned request_sent:1;
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160 unsigned header_sent:1;
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161 };
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162
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163
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164 void ngx_http_upstream_init(ngx_http_request_t *r);
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58
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165
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166
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58
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167 extern ngx_module_t ngx_http_upstream_module;
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28
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168
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169 extern char *ngx_http_upstream_header_errors[];
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170
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171
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172 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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