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lighttpd2/src/modules/mod_flv.c

217 lines
4.4 KiB

/*
* mod_flv - flash pseudo streaming
*
* Description:
* mod_flv lets you stream .flv files in a way that flash players can seek into positions in the timeline.
*
* Setups:
* none
*
* Options:
* none
*
* Actions:
* flv;
* - enables .flv pseudo streaming
*
* Example config:
* if phys.path =$ ".flv" {
* flv;
* }
*
* Tip:
* Use caching and bandwidth throttling to save traffic.
* To prevent the player from buffering at the beginning, use a small burst threshold.
*
* if phys.path =$ ".flv" {
* expire "access 1 month";
* io.throttle 500kbyte => 150kbyte;
* flv;
* }
*
* This config will make browsers cache videos for 1 month and limit bandwidth to 150 kilobyte/s after 500 kilobytes.
*
* Todo:
* - flv audio container support?
*
* Author:
* Copyright (c) 2010 Thomas Porzelt
* License:
* MIT, see COPYING file in the lighttpd 2 tree
*/
#include <lighttpd/base.h>
LI_API gboolean mod_flv_init(liModules *mods, liModule *mod);
LI_API gboolean mod_flv_free(liModules *mods, liModule *mod);
static liHandlerResult flv(liVRequest *vr, gpointer param, gpointer *context) {
gchar *start;
guint len;
goffset pos;
liHandlerResult res;
gboolean cachable;
struct stat st;
int err;
int fd = -1;
UNUSED(context);
UNUSED(param);
if (li_vrequest_is_handled(vr))
return LI_HANDLER_GO_ON;
res = li_stat_cache_get(vr, vr->physical.path, &st, &err, &fd);
if (res == LI_HANDLER_WAIT_FOR_EVENT)
return res;
if (res == LI_HANDLER_ERROR) {
/* open or fstat failed */
if (fd != -1) {
while(-1 == close(fd)) {
if (errno != EINTR)
break;
}
}
if (!li_vrequest_handle_direct(vr)) {
return LI_HANDLER_ERROR;
}
switch (err) {
case ENOENT:
case ENOTDIR:
vr->response.http_status = 404;
return LI_HANDLER_GO_ON;
case EACCES:
vr->response.http_status = 403;
return LI_HANDLER_GO_ON;
default:
VR_ERROR(vr, "stat() or open() for '%s' failed: %s", vr->physical.path->str, g_strerror(err));
return LI_HANDLER_ERROR;
}
} else if (S_ISDIR(st.st_mode)) {
if (fd != -1) {
while(-1 == close(fd)) {
if (errno != EINTR)
break;
}
}
return LI_HANDLER_GO_ON;
} else if (!S_ISREG(st.st_mode)) {
if (fd != -1) {
while(-1 == close(fd)) {
if (errno != EINTR)
break;
}
}
if (!li_vrequest_handle_direct(vr)) {
return LI_HANDLER_ERROR;
}
vr->response.http_status = 403;
} else {
liChunkFile *cf;
#ifdef FD_CLOEXEC
fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
if (!li_vrequest_handle_direct(vr)) {
while(-1 == close(fd)) {
if (errno != EINTR)
break;
}
return LI_HANDLER_ERROR;
}
if (li_querystring_find(vr->request.uri.query, CONST_STR_LEN("start"), &start, &len)) {
guint i;
pos = 0;
for (i = 0; i < len; i++) {
if (start[i] >= '0' && start[i] <= '9') {
pos *= 10;
pos += start[i] - '0';
}
}
} else {
pos = 0;
}
li_etag_set_header(vr, &st, &cachable);
if (cachable) {
vr->response.http_status = 304;
while(-1 == close(fd)) {
if (errno != EINTR)
break;
}
return LI_HANDLER_GO_ON;
}
vr->response.http_status = 200;
li_http_header_overwrite(vr->response.headers, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("video/x-flv"));
if (pos < 0 || pos > st.st_size)
pos = 0;
if (pos != 0)
li_chunkqueue_append_mem(vr->out, CONST_STR_LEN("FLV\x1\x1\0\0\0\x9\0\0\0\x9"));
cf = li_chunkfile_new(NULL, fd, FALSE);
li_chunkqueue_append_chunkfile(vr->out, cf, pos, st.st_size - pos);
li_chunkfile_release(cf);
}
return LI_HANDLER_GO_ON;
}
static liAction* flv_create(liServer *srv, liPlugin* p, liValue *val, gpointer userdata) {
UNUSED(userdata);
if (val) {
ERROR(srv, "%s", "flv does not take any parameters");
return NULL;
}
return li_action_new_function(flv, NULL, NULL, p);
}
static const liPluginAction actions[] = {
{ "flv", flv_create, NULL },
{ NULL, NULL, NULL }
};
static void plugin_flv_init(liServer *srv, liPlugin *p, gpointer userdata) {
UNUSED(srv); UNUSED(userdata);
p->actions = actions;
}
gboolean mod_flv_init(liModules *mods, liModule *mod) {
UNUSED(mod);
MODULE_VERSION_CHECK(mods);
mod->config = li_plugin_register(mods->main, "mod_flv", plugin_flv_init, NULL);
return mod->config != NULL;
}
gboolean mod_flv_free(liModules *mods, liModule *mod) {
if (mod->config)
li_plugin_free(mods->main, mod->config);
return TRUE;
}