Mercurial > hg > nginx
annotate src/http/modules/ngx_http_empty_gif_module.c @ 4314:4a07bad0e2c5
Allowed add_header for proxied 206 replies.
It was working for nginx's own 206 replies as they are seen as 200 in the
headers filter module (range filter goes later in the headers filter chain),
but not for proxied replies.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 28 Nov 2011 10:00:47 +0000 |
| parents | 18f1cb12c6d7 |
| children | d620f497c50f |
| rev | line source |
|---|---|
| 577 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 #include <ngx_config.h> | |
| 7 #include <ngx_core.h> | |
| 8 #include <ngx_http.h> | |
| 9 | |
| 10 | |
| 11 static char *ngx_http_empty_gif(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 12 void *conf); | |
| 13 | |
| 14 static ngx_command_t ngx_http_empty_gif_commands[] = { | |
| 15 | |
| 16 { ngx_string("empty_gif"), | |
| 17 NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS, | |
| 18 ngx_http_empty_gif, | |
| 19 0, | |
| 20 0, | |
| 21 NULL }, | |
| 22 | |
| 23 ngx_null_command | |
| 24 }; | |
| 25 | |
| 26 | |
| 27 /* the minimal single pixel transparent GIF, 43 bytes */ | |
| 28 | |
| 29 static u_char ngx_empty_gif[] = { | |
| 30 | |
| 581 | 31 'G', 'I', 'F', '8', '9', 'a', /* header */ |
| 577 | 32 |
| 581 | 33 /* logical screen descriptor */ |
| 34 0x01, 0x00, /* logical screen width */ | |
| 35 0x01, 0x00, /* logical screen height */ | |
| 36 0x80, /* global 1-bit color table */ | |
| 37 0x01, /* background color #1 */ | |
| 38 0x00, /* no aspect ratio */ | |
| 577 | 39 |
| 581 | 40 /* global color table */ |
| 41 0x00, 0x00, 0x00, /* #0: black */ | |
| 42 0xff, 0xff, 0xff, /* #1: white */ | |
| 577 | 43 |
| 581 | 44 /* graphic control extension */ |
| 45 0x21, /* extension introducer */ | |
| 46 0xf9, /* graphic control label */ | |
| 47 0x04, /* block size */ | |
| 48 0x01, /* transparent color is given, */ | |
| 49 /* no disposal specified, */ | |
| 50 /* user input is not expected */ | |
| 51 0x00, 0x00, /* delay time */ | |
| 52 0x01, /* transparent color #1 */ | |
| 53 0x00, /* block terminator */ | |
| 577 | 54 |
| 581 | 55 /* image descriptor */ |
| 56 0x2c, /* image separator */ | |
| 57 0x00, 0x00, /* image left position */ | |
| 58 0x00, 0x00, /* image top position */ | |
| 59 0x01, 0x00, /* image width */ | |
| 60 0x01, 0x00, /* image height */ | |
| 61 0x00, /* no local color table, no interlaced */ | |
| 577 | 62 |
| 581 | 63 /* table based image data */ |
| 64 0x02, /* LZW minimum code size, */ | |
| 65 /* must be at least 2-bit */ | |
| 66 0x02, /* block size */ | |
| 577 | 67 0x4c, 0x01, /* compressed bytes 01_001_100, 0000000_1 */ |
| 581 | 68 /* 100: clear code */ |
| 69 /* 001: 1 */ | |
| 70 /* 101: end of information code */ | |
| 71 0x00, /* block terminator */ | |
| 577 | 72 |
| 581 | 73 0x3B /* trailer */ |
| 577 | 74 }; |
| 75 | |
| 76 | |
| 667 | 77 static ngx_http_module_t ngx_http_empty_gif_module_ctx = { |
| 577 | 78 NULL, /* preconfiguration */ |
| 79 NULL, /* postconfiguration */ | |
| 80 | |
| 81 NULL, /* create main configuration */ | |
| 82 NULL, /* init main configuration */ | |
| 83 | |
| 84 NULL, /* create server configuration */ | |
| 85 NULL, /* merge server configuration */ | |
| 86 | |
| 87 NULL, /* create location configuration */ | |
| 88 NULL /* merge location configuration */ | |
| 89 }; | |
| 90 | |
| 91 | |
| 92 ngx_module_t ngx_http_empty_gif_module = { | |
| 93 NGX_MODULE_V1, | |
| 94 &ngx_http_empty_gif_module_ctx, /* module context */ | |
| 95 ngx_http_empty_gif_commands, /* module directives */ | |
| 96 NGX_HTTP_MODULE, /* module type */ | |
| 97 NULL, /* init master */ | |
| 98 NULL, /* init module */ | |
| 99 NULL, /* init process */ | |
| 100 NULL, /* init thread */ | |
| 101 NULL, /* exit thread */ | |
| 102 NULL, /* exit process */ | |
| 103 NULL, /* exit master */ | |
| 104 NGX_MODULE_V1_PADDING | |
| 105 }; | |
| 106 | |
| 107 | |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
108 static ngx_str_t ngx_http_gif_type = ngx_string("image/gif"); |
|
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
109 |
|
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
110 |
| 577 | 111 static ngx_int_t |
| 112 ngx_http_empty_gif_handler(ngx_http_request_t *r) | |
| 113 { | |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
114 ngx_http_complex_value_t cv; |
| 577 | 115 |
| 645 | 116 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) { |
| 577 | 117 return NGX_HTTP_NOT_ALLOWED; |
| 118 } | |
| 119 | |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
120 ngx_memzero(&cv, sizeof(ngx_http_complex_value_t)); |
| 577 | 121 |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
122 cv.value.len = sizeof(ngx_empty_gif); |
|
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
123 cv.value.data = ngx_empty_gif; |
| 577 | 124 r->headers_out.last_modified_time = 23349600; |
| 125 | |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
126 return ngx_http_send_response(r, NGX_HTTP_OK, &ngx_http_gif_type, &cv); |
| 577 | 127 } |
| 128 | |
| 129 | |
| 130 static char * | |
| 131 ngx_http_empty_gif(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 132 { | |
| 133 ngx_http_core_loc_conf_t *clcf; | |
| 134 | |
| 135 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); | |
| 136 clcf->handler = ngx_http_empty_gif_handler; | |
| 137 | |
| 138 return NGX_CONF_OK; | |
| 139 } |