Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_flv_module.c @ 8509:5b0c229ba5fe quic
QUIC: fixed padding calculation.
Sometimes, QUIC packets need to be of certain (or minimal) size. This is
achieved by adding PADDING frames. It is possible, that adding padding will
affect header size, thus forcing us to recalculate padding size once more.
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Mon, 05 Jul 2021 13:17:10 +0300 |
parents | 7a55311b0dc3 |
children | 1c3b78d7cdc9 |
rev | line source |
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753 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
753 | 5 */ |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 #include <ngx_http.h> | |
10 | |
11 | |
12 static char *ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); | |
13 | |
14 static ngx_command_t ngx_http_flv_commands[] = { | |
15 | |
16 { ngx_string("flv"), | |
17 NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS, | |
18 ngx_http_flv, | |
19 0, | |
20 0, | |
21 NULL }, | |
22 | |
23 ngx_null_command | |
24 }; | |
25 | |
26 | |
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27 static u_char ngx_flv_header[] = "FLV\x1\x5\0\0\0\x9\0\0\0\0"; |
753 | 28 |
29 | |
30 static ngx_http_module_t ngx_http_flv_module_ctx = { | |
31 NULL, /* preconfiguration */ | |
32 NULL, /* postconfiguration */ | |
33 | |
34 NULL, /* create main configuration */ | |
35 NULL, /* init main configuration */ | |
36 | |
37 NULL, /* create server configuration */ | |
38 NULL, /* merge server configuration */ | |
39 | |
40 NULL, /* create location configuration */ | |
41 NULL /* merge location configuration */ | |
42 }; | |
43 | |
44 | |
45 ngx_module_t ngx_http_flv_module = { | |
46 NGX_MODULE_V1, | |
47 &ngx_http_flv_module_ctx, /* module context */ | |
48 ngx_http_flv_commands, /* module directives */ | |
49 NGX_HTTP_MODULE, /* module type */ | |
50 NULL, /* init master */ | |
51 NULL, /* init module */ | |
52 NULL, /* init process */ | |
53 NULL, /* init thread */ | |
54 NULL, /* exit thread */ | |
55 NULL, /* exit process */ | |
56 NULL, /* exit master */ | |
57 NGX_MODULE_V1_PADDING | |
58 }; | |
59 | |
60 | |
61 static ngx_int_t | |
62 ngx_http_flv_handler(ngx_http_request_t *r) | |
63 { | |
2415 | 64 u_char *last; |
753 | 65 off_t start, len; |
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66 size_t root; |
753 | 67 ngx_int_t rc; |
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68 ngx_uint_t level, i; |
2415 | 69 ngx_str_t path, value; |
753 | 70 ngx_log_t *log; |
71 ngx_buf_t *b; | |
72 ngx_chain_t out[2]; | |
1454 | 73 ngx_open_file_info_t of; |
753 | 74 ngx_http_core_loc_conf_t *clcf; |
75 | |
76 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) { | |
77 return NGX_HTTP_NOT_ALLOWED; | |
78 } | |
79 | |
80 if (r->uri.data[r->uri.len - 1] == '/') { | |
81 return NGX_DECLINED; | |
82 } | |
83 | |
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84 rc = ngx_http_discard_request_body(r); |
753 | 85 |
1374 | 86 if (rc != NGX_OK) { |
753 | 87 return rc; |
88 } | |
89 | |
1454 | 90 last = ngx_http_map_uri_to_path(r, &path, &root, 0); |
91 if (last == NULL) { | |
753 | 92 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
93 } | |
94 | |
95 log = r->connection->log; | |
96 | |
1454 | 97 path.len = last - path.data; |
753 | 98 |
1454 | 99 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, |
100 "http flv filename: \"%V\"", &path); | |
101 | |
102 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
753 | 103 |
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104 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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105 |
3178 | 106 of.read_ahead = clcf->read_ahead; |
2129 | 107 of.directio = clcf->directio; |
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108 of.valid = clcf->open_file_cache_valid; |
1772 | 109 of.min_uses = clcf->open_file_cache_min_uses; |
1454 | 110 of.errors = clcf->open_file_cache_errors; |
1457 | 111 of.events = clcf->open_file_cache_events; |
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112 |
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113 if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) { |
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114 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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115 } |
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116 |
1799 | 117 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool) |
118 != NGX_OK) | |
119 { | |
1454 | 120 switch (of.err) { |
121 | |
122 case 0: | |
123 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
124 | |
125 case NGX_ENOENT: | |
126 case NGX_ENOTDIR: | |
127 case NGX_ENAMETOOLONG: | |
128 | |
753 | 129 level = NGX_LOG_ERR; |
130 rc = NGX_HTTP_NOT_FOUND; | |
1454 | 131 break; |
753 | 132 |
1454 | 133 case NGX_EACCES: |
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134 #if (NGX_HAVE_OPENAT) |
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135 case NGX_EMLINK: |
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136 case NGX_ELOOP: |
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137 #endif |
1454 | 138 |
753 | 139 level = NGX_LOG_ERR; |
140 rc = NGX_HTTP_FORBIDDEN; | |
1454 | 141 break; |
753 | 142 |
1454 | 143 default: |
144 | |
753 | 145 level = NGX_LOG_CRIT; |
146 rc = NGX_HTTP_INTERNAL_SERVER_ERROR; | |
1454 | 147 break; |
753 | 148 } |
149 | |
150 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) { | |
1454 | 151 ngx_log_error(level, log, of.err, |
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152 "%s \"%s\" failed", of.failed, path.data); |
753 | 153 } |
154 | |
155 return rc; | |
156 } | |
157 | |
1454 | 158 if (!of.is_file) { |
753 | 159 return NGX_DECLINED; |
160 } | |
161 | |
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162 r->root_tested = !r->error_page; |
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163 |
753 | 164 start = 0; |
1454 | 165 len = of.size; |
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166 i = 1; |
753 | 167 |
168 if (r->args.len) { | |
169 | |
2415 | 170 if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) { |
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171 |
2415 | 172 start = ngx_atoof(value.data, value.len); |
753 | 173 |
174 if (start == NGX_ERROR || start >= len) { | |
175 start = 0; | |
176 } | |
177 | |
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178 if (start) { |
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179 len = sizeof(ngx_flv_header) - 1 + len - start; |
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180 i = 0; |
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181 } |
753 | 182 } |
183 } | |
184 | |
185 log->action = "sending flv to client"; | |
186 | |
187 r->headers_out.status = NGX_HTTP_OK; | |
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188 r->headers_out.content_length_n = len; |
1454 | 189 r->headers_out.last_modified_time = of.mtime; |
753 | 190 |
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191 if (ngx_http_set_etag(r) != NGX_OK) { |
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192 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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193 } |
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194 |
753 | 195 if (ngx_http_set_content_type(r) != NGX_OK) { |
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196 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
753 | 197 } |
198 | |
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199 if (i == 0) { |
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200 b = ngx_calloc_buf(r->pool); |
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201 if (b == NULL) { |
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202 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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203 } |
753 | 204 |
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205 b->pos = ngx_flv_header; |
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206 b->last = ngx_flv_header + sizeof(ngx_flv_header) - 1; |
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207 b->memory = 1; |
753 | 208 |
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209 out[0].buf = b; |
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210 out[0].next = &out[1]; |
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211 } |
753 | 212 |
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213 |
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214 b = ngx_calloc_buf(r->pool); |
753 | 215 if (b == NULL) { |
216 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
217 } | |
218 | |
219 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t)); | |
220 if (b->file == NULL) { | |
221 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
222 } | |
223 | |
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224 r->allow_ranges = 1; |
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225 |
753 | 226 rc = ngx_http_send_header(r); |
227 | |
228 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
229 return rc; | |
230 } | |
231 | |
232 b->file_pos = start; | |
1454 | 233 b->file_last = of.size; |
753 | 234 |
235 b->in_file = b->file_last ? 1: 0; | |
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236 b->last_buf = (r == r->main) ? 1 : 0; |
753 | 237 b->last_in_chain = 1; |
238 | |
1696 | 239 b->file->fd = of.fd; |
753 | 240 b->file->name = path; |
241 b->file->log = log; | |
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242 b->file->directio = of.is_directio; |
753 | 243 |
244 out[1].buf = b; | |
245 out[1].next = NULL; | |
246 | |
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247 return ngx_http_output_filter(r, &out[i]); |
753 | 248 } |
249 | |
250 | |
251 static char * | |
252 ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
253 { | |
254 ngx_http_core_loc_conf_t *clcf; | |
255 | |
256 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); | |
257 clcf->handler = ngx_http_flv_handler; | |
258 | |
259 return NGX_CONF_OK; | |
260 } |