1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
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
27 static u_char ngx_flv_header[] = "FLV\x1\x5\0\0\0\x9\0\0\0\0";
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
ngx_http_flv_handler(ngx_http_request_t * r)62 ngx_http_flv_handler(ngx_http_request_t *r)
63 {
64 u_char *last;
65 off_t start, len;
66 size_t root;
67 ngx_int_t rc;
68 ngx_uint_t level, i;
69 ngx_str_t path, value;
70 ngx_log_t *log;
71 ngx_buf_t *b;
72 ngx_chain_t out[2];
73 ngx_open_file_info_t of;
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
84 rc = ngx_http_discard_request_body(r);
85
86 if (rc != NGX_OK) {
87 return rc;
88 }
89
90 last = ngx_http_map_uri_to_path(r, &path, &root, 0);
91 if (last == NULL) {
92 return NGX_HTTP_INTERNAL_SERVER_ERROR;
93 }
94
95 log = r->connection->log;
96
97 path.len = last - path.data;
98
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);
103
104 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
105
106 of.read_ahead = clcf->read_ahead;
107 of.directio = clcf->directio;
108 of.valid = clcf->open_file_cache_valid;
109 of.min_uses = clcf->open_file_cache_min_uses;
110 of.errors = clcf->open_file_cache_errors;
111 of.events = clcf->open_file_cache_events;
112
113 if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
114 return NGX_HTTP_INTERNAL_SERVER_ERROR;
115 }
116
117 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
118 != NGX_OK)
119 {
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
129 level = NGX_LOG_ERR;
130 rc = NGX_HTTP_NOT_FOUND;
131 break;
132
133 case NGX_EACCES:
134 #if (NGX_HAVE_OPENAT)
135 case NGX_EMLINK:
136 case NGX_ELOOP:
137 #endif
138
139 level = NGX_LOG_ERR;
140 rc = NGX_HTTP_FORBIDDEN;
141 break;
142
143 default:
144
145 level = NGX_LOG_CRIT;
146 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
147 break;
148 }
149
150 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
151 ngx_log_error(level, log, of.err,
152 "%s \"%s\" failed", of.failed, path.data);
153 }
154
155 return rc;
156 }
157
158 if (!of.is_file) {
159
160 if (ngx_close_file(of.fd) == NGX_FILE_ERROR) {
161 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
162 ngx_close_file_n " \"%s\" failed", path.data);
163 }
164
165 return NGX_DECLINED;
166 }
167
168 r->root_tested = !r->error_page;
169
170 start = 0;
171 len = of.size;
172 i = 1;
173
174 if (r->args.len) {
175
176 if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) {
177
178 start = ngx_atoof(value.data, value.len);
179
180 if (start == NGX_ERROR || start >= len) {
181 start = 0;
182 }
183
184 if (start) {
185 len = sizeof(ngx_flv_header) - 1 + len - start;
186 i = 0;
187 }
188 }
189 }
190
191 log->action = "sending flv to client";
192
193 r->headers_out.status = NGX_HTTP_OK;
194 r->headers_out.content_length_n = len;
195 r->headers_out.last_modified_time = of.mtime;
196
197 if (ngx_http_set_etag(r) != NGX_OK) {
198 return NGX_HTTP_INTERNAL_SERVER_ERROR;
199 }
200
201 if (ngx_http_set_content_type(r) != NGX_OK) {
202 return NGX_HTTP_INTERNAL_SERVER_ERROR;
203 }
204
205 if (i == 0) {
206 b = ngx_calloc_buf(r->pool);
207 if (b == NULL) {
208 return NGX_HTTP_INTERNAL_SERVER_ERROR;
209 }
210
211 b->pos = ngx_flv_header;
212 b->last = ngx_flv_header + sizeof(ngx_flv_header) - 1;
213 b->memory = 1;
214
215 out[0].buf = b;
216 out[0].next = &out[1];
217 }
218
219
220 b = ngx_calloc_buf(r->pool);
221 if (b == NULL) {
222 return NGX_HTTP_INTERNAL_SERVER_ERROR;
223 }
224
225 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
226 if (b->file == NULL) {
227 return NGX_HTTP_INTERNAL_SERVER_ERROR;
228 }
229
230 r->allow_ranges = 1;
231
232 rc = ngx_http_send_header(r);
233
234 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
235 return rc;
236 }
237
238 b->file_pos = start;
239 b->file_last = of.size;
240
241 b->in_file = b->file_last ? 1: 0;
242 b->last_buf = (r == r->main) ? 1 : 0;
243 b->last_in_chain = 1;
244
245 b->file->fd = of.fd;
246 b->file->name = path;
247 b->file->log = log;
248 b->file->directio = of.is_directio;
249
250 out[1].buf = b;
251 out[1].next = NULL;
252
253 return ngx_http_output_filter(r, &out[i]);
254 }
255
256
257 static char *
ngx_http_flv(ngx_conf_t * cf,ngx_command_t * cmd,void * conf)258 ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
259 {
260 ngx_http_core_loc_conf_t *clcf;
261
262 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
263 clcf->handler = ngx_http_flv_handler;
264
265 return NGX_CONF_OK;
266 }
267