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fdstream.c
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fdstream.c
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/*
Copyright (C) 2009 Conrad Parker
*/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h> /* STDIN_FILENO */
#include "http-reqline.h"
#include "http-status.h"
#include "params.h"
#include "resource.h"
#include "stream.h"
#define DEFAULT_CONTENT_TYPE "video/mp4"
#define x_strdup(s) ((s)?strdup((s)):(NULL))
struct fdstream {
const char * path;
const char * content_type;
struct stream * stream;
};
static int
fdstream_check (http_request * request, void * data)
{
struct fdstream * st = (struct fdstream *)data;
return !strncmp (request->path, st->path, strlen(st->path));
}
static void
fdstream_head (http_request * request, params_t * request_headers, const char ** status_line,
params_t ** response_headers, void * data)
{
struct fdstream * st = (struct fdstream *)data;
params_t * r = *response_headers;
*status_line = http_status_line (HTTP_STATUS_OK);
r = params_append (r, "Content-Type", st->content_type);
}
static void
fdstream_body (int fd, http_request * request, params_t * request_headers, void * data)
{
struct fdstream * st = (struct fdstream *)data;
struct stream * stream = st->stream;
size_t n, avail;
int rd;
rd = ringbuffer_open (&stream->rb);
while (stream->active) {
while ((avail = ringbuffer_avail (&stream->rb, rd)) == 0)
usleep (10000);
#ifdef DEBUG
if (avail != 0) printf ("stream_reader: %ld bytes available\n", avail);
#endif
n = ringbuffer_writefd (fd, &stream->rb, rd);
if (n == -1) {
break;
}
fsync (fd);
#ifdef DEBUG
if (n!=0 || avail != 0) printf ("stream_reader: wrote %ld of %ld bytes to socket\n", n, avail);
#endif
}
ringbuffer_close (&stream->rb, rd);
}
static void
fdstream_delete (void * data)
{
struct fdstream * st = (struct fdstream *)data;
stream_close (st->stream);
free (st->path);
free (st->content_type);
free (st);
}
struct resource *
fdstream_resource (const char * path, int fd, const char * content_type)
{
struct fdstream * st;
if ((st = calloc (1, sizeof(*st))) == NULL)
return NULL;
st->path = x_strdup (path);
st->content_type = x_strdup (content_type);
st->stream = stream_open (fd);
return resource_new (fdstream_check, fdstream_head, fdstream_body, fdstream_delete, st);
}
struct resource *
fdstream_resource_open (const char * urlpath, const char * filepath, const char * content_type)
{
int fd;
if ((fd = open (filepath, O_RDONLY)) == -1)
return NULL;
return fdstream_resource (urlpath, fd, content_type);
}
list_t *
fdstream_resources (Dictionary * config)
{
list_t * l;
const char * path;
const char * ctype;
l = list_new();
path = dictionary_lookup (config, "Path");
ctype = dictionary_lookup (config, "Type");
if (!ctype) ctype = DEFAULT_CONTENT_TYPE;
if (path)
l = list_append (l, fdstream_resource (path, STDIN_FILENO, ctype));
/* fdstream_resource_open ("/stream2", "/tmp/stream2.264", "video/mp4"); */
return l;
}