[libmicrohttpd] seeking file server

Hi,

I am trying to implement a seeking file server with MHD. My prototype looks almost like the fileserver example (see below).

A few questions regarding this:

I am playing a file via mplayer http://localhost:8001/anything

mplayers HTTP GET commands look like this:

GET /s.avi HTTP/1.0

Host: macbook.local

User-Agent: MPlayer VERSION

Icy-MetaData: 1

Connection: close

GET /s.avi HTTP/1.0

Host: macbook.local

User-Agent: MPlayer VERSION

Icy-MetaData: 1

Range: bytes=14159872-

Connection: close

GET /s.avi HTTP/1.0

Host: macbook.local

User-Agent: MPlayer VERSION

Icy-MetaData: 1

Range: bytes=10240-

Connection: close

GET /s.avi HTTP/1.0

Host: macbook.local

User-Agent: MPlayer VERSION

Icy-MetaData: 1

Range: bytes=13590528-

Connection: close

So I thought, I need to reply to the range: bytes=n header.

Is there a good way of doing this, rather than this:

{

char br[64]; sprintf(br, "bytes %lu-", byteRange); fseek(file, byteRange, SEEK_SET);

response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,

32 * 1024, /* 32k page size */

&file_reader,

file,

&free_callback);

MHD_add_response_header(response, MHD_HTTP_HEADER_CONTENT_TYPE, "video/x-msvideo");

//MHD_add_response_header(response, MHD_HTTP_HEADER_ETAG, "519240-d8e800-489aa5cc98940");

MHD_add_response_header(response, MHD_HTTP_HEADER_ACCEPT_RANGES, "bytes");

//MHD_add_response_header(response, MHD_HTTP_HEADER_CONTENT_LENGTH, "14215168");

MHD_add_response_header(response, MHD_HTTP_HEADER_CONTENT_RANGE, br);

...

}

I do not get the video to play, I get those connection headers though:

Connection:close

Icy-MetaData:1

User-Agent:MPlayer/SVN-r31524-4.0.1

Host:localhost:8001

result h:4, byteRange:0

Connection:close

Icy-MetaData:1

User-Agent:MPlayer/SVN-r31524-4.0.1

Host:localhost:8001

result h:4, byteRange:0

Connection:close

Range:bytes=14159872-

Icy-MetaData:1

User-Agent:MPlayer/SVN-r31524-4.0.1

Host:localhost:8001

result h:5, byteRange:14159872

Connection:close

Range:bytes=14159872-

Icy-MetaData:1

User-Agent:MPlayer/SVN-r31524-4.0.1

Host:localhost:8001

result h:5, byteRange:14159872

Please help, I am stuck on this one for a couple of days now.

cheers

Ronny

This file is part of libmicrohttpd

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

/**

* @file fileserver_example.c

* @brief minimal example for how to use libmicrohttpd to serve files

* @author Christian Grothoff

#include <fcntl.h>

#include <stdio.h>

#include <stdint.h>

#include <sys/types.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/stat.h>

#include <stdlib.h>

#include <string.h>

#include <stdio.h>

#include <microhttpd.h>

#include <unistd.h>

#define PAGE "<html><head><title>File not found</title></head><body>File not found</body></html>"

static int

file_reader (void *cls, uint64_t pos, char *buf, int max)

{

FILE *file = cls;

//(void) fseek (file, pos, SEEK_SET);

return fread (buf, 1, max, file);

}

static void

free_callback (void *cls)

{

FILE *file = cls;

fclose (file);

}

static int

header_iterator (void *cls,

enum MHD_ValueKind kind,

const char *key,

const char *value) {

printf("%s:%s\n", key, value);

if (!strcmp(key, MHD_HTTP_HEADER_RANGE)) { //parse Range //HACKHACK: assume "bytes=%i-" *(long*)cls = atoi(value + 6); }

return MHD_YES;

}

static int

ahc_echo (void *cls,

struct MHD_Connection *connection,

const char *url,

const char *method,

const char *version,

const char *upload_data,

size_t *upload_data_size, void **ptr)

{

static int aptr;

struct MHD_Response *response;

int ret;

FILE *file;

char *fileURL = "/tmp/s.avi";

struct stat buf;

long byteRange;

if (0 != strcmp (method, MHD_HTTP_METHOD_GET))

return MHD_NO; /* unexpected method */

int h = MHD_get_connection_values(connection,

MHD_HEADER_KIND,

&header_iterator,

&byteRange);

// printf("result h:%i\n", h);

if (&aptr != *ptr)

{

/* do never respond on first call */

*ptr = &aptr;

return MHD_YES;

}

*ptr = NULL; /* reset when done */

if (0 == stat (fileURL, &buf))

file = fopen (fileURL, "rb");

else

file = NULL;

if (file == NULL)

{

response = MHD_create_response_from_data (strlen (PAGE),

(void *) PAGE,

MHD_NO, MHD_NO);

ret = MHD_queue_response (connection, MHD_HTTP_NOT_FOUND, response);

MHD_destroy_response (response);

}

else

{

char br[64]; sprintf(br, "bytes %lu-", byteRange); fseek(file, byteRange, SEEK_SET);

response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,

32 * 1024, /* 32k page size */

&file_reader,

file,

&free_callback);

MHD_add_response_header(response, MHD_HTTP_HEADER_CONTENT_TYPE, "video/x-msvideo");

//MHD_add_response_header(response, MHD_HTTP_HEADER_ETAG, "519240-d8e800-489aa5cc98940");

MHD_add_response_header(response, MHD_HTTP_HEADER_ACCEPT_RANGES, "bytes");

//MHD_add_response_header(response, MHD_HTTP_HEADER_CONTENT_LENGTH, "14215168");

MHD_add_response_header(response, MHD_HTTP_HEADER_CONTENT_RANGE, br);

if (response == NULL)

{

fclose (file);

return MHD_NO;

}

ret = MHD_queue_response (connection, MHD_HTTP_OK, response);

MHD_destroy_response (response);

}

return ret;

}

int

main (int argc, char *const *argv)

{

struct MHD_Daemon *d;

// if (argc != 2)

// {

// printf ("%s PORT\n", argv[0]);

// return 1;

// }

d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,

8001,

NULL, NULL, &ahc_echo, PAGE, MHD_OPTION_END);

if (d == NULL)

return 1;

(void) getc (stdin);

MHD_stop_daemon (d);

return 0;

}

From:	Ronny Falk
Subject:	[libmicrohttpd] seeking file server
Date:	Sun, 1 Aug 2010 23:40:38 -0400