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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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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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32 time_t bl_time;
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33 ngx_uint_t bl_state;
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34
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35 ngx_uint_t status;
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36 time_t time;
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37
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38 ngx_str_t *peer;
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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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43 ngx_msec_t connect_timeout;
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44 ngx_msec_t send_timeout;
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45 ngx_msec_t read_timeout;
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46
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47 size_t send_lowat;
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48 size_t header_buffer_size;
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49 size_t busy_buffers_size;
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50 size_t max_temp_file_size;
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51 size_t temp_file_write_size;
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52
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53 ngx_uint_t next_upstream;
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54
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55 ngx_bufs_t bufs;
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56
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57 ngx_flag_t x_powered_by;
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58 ngx_flag_t cyclic_temp_file;
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59
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60 ngx_path_t *temp_path;
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61 } ngx_http_upstream_conf_t;
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62
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63
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64 typedef struct ngx_http_upstream_s ngx_http_upstream_t;
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65
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66 struct ngx_http_upstream_s {
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67 ngx_http_request_t *request;
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68
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69 ngx_peer_connection_t peer;
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70
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71 ngx_event_pipe_t pipe;
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72
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73 ngx_output_chain_ctx_t output;
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74 ngx_chain_writer_ctx_t writer;
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75
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76 ngx_http_upstream_conf_t *conf;
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77
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78 ngx_buf_t header_in;
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79
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80 ngx_int_t (*create_request)(ngx_http_request_t *r);
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81 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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82 ngx_int_t (*process_header)(ngx_http_request_t *r);
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83 ngx_int_t (*send_header)(ngx_http_request_t *r);
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84 void (*abort_request)(ngx_http_request_t *r);
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85 void (*finalize_request)(ngx_http_request_t *r,
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86 ngx_int_t rc);
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87 ngx_uint_t method;
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88
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89 ngx_str_t schema;
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90 ngx_str_t uri;
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91 ngx_str_t *location;
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92
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93 ngx_http_log_ctx_t *log_ctx;
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94 ngx_log_handler_pt log_handler;
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95 ngx_http_log_ctx_t *saved_ctx;
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96 ngx_log_handler_pt saved_handler;
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97
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98 /* used to parse an upstream HTTP header */
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99 ngx_uint_t status;
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100 u_char *status_start;
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101 u_char *status_end;
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102 ngx_uint_t status_count;
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103 ngx_uint_t parse_state;
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104
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105 ngx_http_upstream_state_t *state;
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106 ngx_array_t states; /* of ngx_http_upstream_state_t */
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107
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108 unsigned cachable:1;
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109
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110 unsigned request_sent:1;
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111 unsigned header_sent:1;
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112 };
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113
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114
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115 void ngx_http_upstream_init(ngx_http_request_t *r);
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116 u_char *ngx_http_upstream_log_error(void *data, u_char *buf, size_t len);
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117
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118
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119 extern char *ngx_http_upstream_header_errors[];
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120
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121
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122 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */
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