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_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
12
13 static ngx_command_t ngx_http_flv_commands[] = {
14
15 { ngx_string("flv"),
16 NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
17 ngx_http_flv,
18 0,
19 0,
20 NULL },
21
22 ngx_null_command
23 };
24
25
26 static u_char ngx_flv_header[] = "FLV\x1\x5\0\0\0\x9\0\0\0\0";
27
28
29 static ngx_http_module_t ngx_http_flv_module_ctx = {
30 NULL, /* preconfiguration */
31 NULL, /* postconfiguration */
32
33 NULL, /* create main configuration */
34 NULL, /* init main configuration */
35
36 NULL, /* create server configuration */
37 NULL, /* merge server configuration */
38
39 NULL, /* create location configuration */
40 NULL /* merge location configuration */
41 };
42
43
44 ngx_module_t ngx_http_flv_module = {
45 NGX_MODULE_V1,
46 &ngx_http_flv_module_ctx, /* module context */
47 ngx_http_flv_commands, /* module directives */
48 NGX_HTTP_MODULE, /* module type */
49 NULL, /* init master */
50 NULL, /* init module */
51 NULL, /* init process */
52 NULL, /* init thread */
53 NULL, /* exit thread */
54 NULL, /* exit process */
55 NULL, /* exit master */
56 NGX_MODULE_V1_PADDING
57 };
58
59
60 static ngx_int_t
61 ngx_http_flv_handler(ngx_http_request_t *r)
62 {
63 u_char *last;
64 off_t start, len;
65 size_t root;
66 ngx_int_t rc;
67 ngx_uint_t level, i;
68 ngx_str_t path, value;
69 ngx_log_t *log;
70 ngx_buf_t *b;
71 ngx_chain_t out[2];
72 ngx_open_file_info_t of;
73 ngx_http_core_loc_conf_t *clcf;
74
75 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
76 return NGX_HTTP_NOT_ALLOWED;
77 }
78
79 if (r->uri.data[r->uri.len - 1] == '/') {
80 return NGX_DECLINED;
81 }
82
83 rc = ngx_http_discard_request_body(r);
84
85 if (rc != NGX_OK) {
86 return rc;
87 }
88
89 last = ngx_http_map_uri_to_path(r, &path, &root, 0);
90 if (last == NULL) {
91 return NGX_HTTP_INTERNAL_SERVER_ERROR;
92 }
93
94 log = r->connection->log;
95
96 path.len = last - path.data;
97
98 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
99 "http flv filename: \"%V\"", &path);
100
101 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
102
103 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
104
105 of.read_ahead = clcf->read_ahead;
106 of.directio = clcf->directio;
107 of.valid = clcf->open_file_cache_valid;
108 of.min_uses = clcf->open_file_cache_min_uses;
109 of.errors = clcf->open_file_cache_errors;
110 of.events = clcf->open_file_cache_events;
111
112 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
113 != NGX_OK)
114 {
115 switch (of.err) {
116
117 case 0:
118 return NGX_HTTP_INTERNAL_SERVER_ERROR;
119
120 case NGX_ENOENT:
121 case NGX_ENOTDIR:
122 case NGX_ENAMETOOLONG:
123
124 level = NGX_LOG_ERR;
125 rc = NGX_HTTP_NOT_FOUND;
126 break;
127
128 case NGX_EACCES:
129
130 level = NGX_LOG_ERR;
131 rc = NGX_HTTP_FORBIDDEN;
132 break;
133
134 default:
135
136 level = NGX_LOG_CRIT;
137 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
138 break;
139 }
140
141 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
142 ngx_log_error(level, log, of.err,
143 "%s \"%s\" failed", of.failed, path.data);
144 }
145
146 return rc;
147 }
148
149 if (!of.is_file) {
150
151 if (ngx_close_file(of.fd) == NGX_FILE_ERROR) {
152 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
153 ngx_close_file_n " \"%s\" failed", path.data);
154 }
155
156 return NGX_DECLINED;
157 }
158
159 r->root_tested = !r->error_page;
160
161 start = 0;
162 len = of.size;
163 i = 1;
164
165 if (r->args.len) {
166
167 if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) {
168
169 start = ngx_atoof(value.data, value.len);
170
171 if (start == NGX_ERROR || start >= len) {
172 start = 0;
173 }
174
175 if (start) {
176 len = sizeof(ngx_flv_header) - 1 + len - start;
177 i = 0;
178 }
179 }
180 }
181
182 log->action = "sending flv to client";
183
184 r->headers_out.status = NGX_HTTP_OK;
185 r->headers_out.content_length_n = len;
186 r->headers_out.last_modified_time = of.mtime;
187
188 if (ngx_http_set_content_type(r) != NGX_OK) {
189 return NGX_HTTP_INTERNAL_SERVER_ERROR;
190 }
191
192 if (i == 0) {
193 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
194 if (b == NULL) {
195 return NGX_HTTP_INTERNAL_SERVER_ERROR;
196 }
197
198 b->pos = ngx_flv_header;
199 b->last = ngx_flv_header + sizeof(ngx_flv_header) - 1;
200 b->memory = 1;
201
202 out[0].buf = b;
203 out[0].next = &out[1];
204 }
205
206
207 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
208 if (b == NULL) {
209 return NGX_HTTP_INTERNAL_SERVER_ERROR;
210 }
211
212 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
213 if (b->file == NULL) {
214 return NGX_HTTP_INTERNAL_SERVER_ERROR;
215 }
216
217 r->allow_ranges = 1;
218
219 rc = ngx_http_send_header(r);
220
221 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
222 return rc;
223 }
224
225 b->file_pos = start;
226 b->file_last = of.size;
227
228 b->in_file = b->file_last ? 1: 0;
229 b->last_buf = 1;
230 b->last_in_chain = 1;
231
232 b->file->fd = of.fd;
233 b->file->name = path;
234 b->file->log = log;
235 b->file->directio = of.is_directio;
236
237 out[1].buf = b;
238 out[1].next = NULL;
239
240 return ngx_http_output_filter(r, &out[i]);
241 }
242
243
244 static char *
245 ngx_http_flv(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
246 {
247 ngx_http_core_loc_conf_t *clcf;
248
249 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
250 clcf->handler = ngx_http_flv_handler;
251
252 return NGX_CONF_OK;
253 }
254
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