Mercurial > hg > nginx
annotate src/http/modules/ngx_http_empty_gif_module.c @ 9274:46ecad404a29 default tip
Mail: reset imap tag to empty after authentication attempt.
We need to reset the imap tag to empty after an authentication attempt
completes, otherwise if the next line parsed is incomplete with no tag
(e.g. empty line) then we use the "tag" from the previous buffer which
is now definitely wrong and has been partially overwritten with the most
recently read data (e.g. CRLF).
An example before this patch:
S: * OK IMAP4 ready
C: foobar login a b
S: foobar NO Incorrect username or password.
C:
S:
S: obar BAD invalid command
Then with this patch:
S: * OK IMAP4 ready
C: foobar login a b
S: foobar NO Incorrect username or password.
C:
S: * BAD invalid command
| author | Rob Mueller <robm@fastmailteam.com> |
|---|---|
| date | Wed, 15 May 2024 10:06:00 +0300 |
| parents | d620f497c50f |
| children |
| rev | line source |
|---|---|
| 577 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 577 | 5 */ |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_http.h> | |
| 10 | |
| 11 | |
| 12 static char *ngx_http_empty_gif(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 13 void *conf); | |
| 14 | |
| 15 static ngx_command_t ngx_http_empty_gif_commands[] = { | |
| 16 | |
| 17 { ngx_string("empty_gif"), | |
| 18 NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS, | |
| 19 ngx_http_empty_gif, | |
| 20 0, | |
| 21 0, | |
| 22 NULL }, | |
| 23 | |
| 24 ngx_null_command | |
| 25 }; | |
| 26 | |
| 27 | |
| 28 /* the minimal single pixel transparent GIF, 43 bytes */ | |
| 29 | |
| 30 static u_char ngx_empty_gif[] = { | |
| 31 | |
| 581 | 32 'G', 'I', 'F', '8', '9', 'a', /* header */ |
| 577 | 33 |
| 581 | 34 /* logical screen descriptor */ |
| 35 0x01, 0x00, /* logical screen width */ | |
| 36 0x01, 0x00, /* logical screen height */ | |
| 37 0x80, /* global 1-bit color table */ | |
| 38 0x01, /* background color #1 */ | |
| 39 0x00, /* no aspect ratio */ | |
| 577 | 40 |
| 581 | 41 /* global color table */ |
| 42 0x00, 0x00, 0x00, /* #0: black */ | |
| 43 0xff, 0xff, 0xff, /* #1: white */ | |
| 577 | 44 |
| 581 | 45 /* graphic control extension */ |
| 46 0x21, /* extension introducer */ | |
| 47 0xf9, /* graphic control label */ | |
| 48 0x04, /* block size */ | |
| 49 0x01, /* transparent color is given, */ | |
| 50 /* no disposal specified, */ | |
| 51 /* user input is not expected */ | |
| 52 0x00, 0x00, /* delay time */ | |
| 53 0x01, /* transparent color #1 */ | |
| 54 0x00, /* block terminator */ | |
| 577 | 55 |
| 581 | 56 /* image descriptor */ |
| 57 0x2c, /* image separator */ | |
| 58 0x00, 0x00, /* image left position */ | |
| 59 0x00, 0x00, /* image top position */ | |
| 60 0x01, 0x00, /* image width */ | |
| 61 0x01, 0x00, /* image height */ | |
| 62 0x00, /* no local color table, no interlaced */ | |
| 577 | 63 |
| 581 | 64 /* table based image data */ |
| 65 0x02, /* LZW minimum code size, */ | |
| 66 /* must be at least 2-bit */ | |
| 67 0x02, /* block size */ | |
| 577 | 68 0x4c, 0x01, /* compressed bytes 01_001_100, 0000000_1 */ |
| 581 | 69 /* 100: clear code */ |
| 70 /* 001: 1 */ | |
| 71 /* 101: end of information code */ | |
| 72 0x00, /* block terminator */ | |
| 577 | 73 |
| 581 | 74 0x3B /* trailer */ |
| 577 | 75 }; |
| 76 | |
| 77 | |
| 667 | 78 static ngx_http_module_t ngx_http_empty_gif_module_ctx = { |
| 577 | 79 NULL, /* preconfiguration */ |
| 80 NULL, /* postconfiguration */ | |
| 81 | |
| 82 NULL, /* create main configuration */ | |
| 83 NULL, /* init main configuration */ | |
| 84 | |
| 85 NULL, /* create server configuration */ | |
| 86 NULL, /* merge server configuration */ | |
| 87 | |
| 88 NULL, /* create location configuration */ | |
| 89 NULL /* merge location configuration */ | |
| 90 }; | |
| 91 | |
| 92 | |
| 93 ngx_module_t ngx_http_empty_gif_module = { | |
| 94 NGX_MODULE_V1, | |
| 95 &ngx_http_empty_gif_module_ctx, /* module context */ | |
| 96 ngx_http_empty_gif_commands, /* module directives */ | |
| 97 NGX_HTTP_MODULE, /* module type */ | |
| 98 NULL, /* init master */ | |
| 99 NULL, /* init module */ | |
| 100 NULL, /* init process */ | |
| 101 NULL, /* init thread */ | |
| 102 NULL, /* exit thread */ | |
| 103 NULL, /* exit process */ | |
| 104 NULL, /* exit master */ | |
| 105 NGX_MODULE_V1_PADDING | |
| 106 }; | |
| 107 | |
| 108 | |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
109 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
|
110 |
|
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
111 |
| 577 | 112 static ngx_int_t |
| 113 ngx_http_empty_gif_handler(ngx_http_request_t *r) | |
| 114 { | |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
115 ngx_http_complex_value_t cv; |
| 577 | 116 |
| 645 | 117 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) { |
| 577 | 118 return NGX_HTTP_NOT_ALLOWED; |
| 119 } | |
| 120 | |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
121 ngx_memzero(&cv, sizeof(ngx_http_complex_value_t)); |
| 577 | 122 |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
123 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
|
124 cv.value.data = ngx_empty_gif; |
| 577 | 125 r->headers_out.last_modified_time = 23349600; |
| 126 | |
|
3635
c0113b6648de
use ngx_http_send_response() in empty_gif
Igor Sysoev <igor@sysoev.ru>
parents:
3516
diff
changeset
|
127 return ngx_http_send_response(r, NGX_HTTP_OK, &ngx_http_gif_type, &cv); |
| 577 | 128 } |
| 129 | |
| 130 | |
| 131 static char * | |
| 132 ngx_http_empty_gif(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 133 { | |
| 134 ngx_http_core_loc_conf_t *clcf; | |
| 135 | |
| 136 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); | |
| 137 clcf->handler = ngx_http_empty_gif_handler; | |
| 138 | |
| 139 return NGX_CONF_OK; | |
| 140 } |