live audio stream socket get stuck in browser

问题:

I'm trying to setup a page where several (private) streams can be listened from. Unfortunately I'm not able to get it running. I tried Using php to opening live audio stream on android already, but for some reason the browser get stuck when loading the script.

See below script with an example of a working host (see http://icecast.omroep.nl/radio4-bb-mp3)

Could someone please enlighten me.

Tnx in advance!

    $host = "icecast.omroep.nl";
    $port = 80;
    $sub = "/radio4-bb-mp3";


    $sock = fsockopen($host,$port, $errno, $errstr, 30);
    if (!$sock){
        throw new Exception("$errstr ($errno)");
    }

    header("Content-type: audio/mpeg");
    header("Connection: close");

    fputs($sock, "GET $sub HTTP/1\r\n");
    fputs($sock, "Host: $host \r\n");
    fputs($sock, "Accept: */*\r\n");
    fputs($sock, "Icy-MetaData:1\r\n");
    fputs($sock, "Connection: close\r\n\r\n");

    fpassthru($sock);
    fclose($sock);

回答1:

Following comments the solution you are looking is:

<?php

$host = "icecast.omroep.nl";
$sub = "/radio4-bb-mp3";
header("Location:  http://{$host}{$sub}");

Now I will explain what was wrong with your code

You have a problem with the headers. You are adding your own headers and the remote headers as part of the body.

icecast.omroep.nl headers

HTTP/1.0 200 OK
Content-Type: audio/mpeg
Date: Sat, 24 Mar 2018 16:01:23 GMT
icy-br:192
ice-audio-info: samplerate=48000;channels=2;bitrate=192
icy-br:192
icy-genre:Classical
icy-metadata:1
icy-name:NPO Radio4
icy-pub:0
icy-url:http://www.radio4.nl
Server: Icecast 2.4.0-kh8
Cache-Control: no-cache, no-store
Access-Control-Allow-Origin: *
Access-Control-Allow-Headers: Origin, Accept, X-Requested-With, Content-Type
Access-Control-Allow-Methods: GET, OPTIONS, HEAD
Connection: Close
Expires: Mon, 26 Jul 1997 05:00:00 GMT
icy-metaint:16000

Given your script index.php

<?php

$host = "icecast.omroep.nl";
$port = 80;
$sub = "/radio4-bb-mp3";


$sock = fsockopen($host,$port, $errno, $errstr, 30);
if (!$sock){
    throw new Exception("$errstr ($errno)");
}

fputs($sock, "GET $sub HTTP/1\r\n");
fputs($sock, "Host: $host \r\n");
fputs($sock, "Accept: */*\r\n");
fputs($sock, "Icy-MetaData:1\r\n");
fputs($sock, "Connection: close\r\n\r\n");

fpassthru($sock);
fclose($sock);

request.txt

GET /
[Blank line]

Serving your script

$ php -S 0.0.0.0:8000 index.php

Your script response:

$ (nc 127.0.0.1 8000 < request.txt) | head -n 27

HTTP/0.9 200 OK
Date: Sat, 24 Mar 2018 16:01:23 +0000
Connection: close
X-Powered-By: PHP/7.1.14
Content-type: text/html; charset=UTF-8

HTTP/1.0 200 OK
Content-Type: audio/mpeg
Date: Sat, 24 Mar 2018 16:01:23 GMT
icy-br:192
ice-audio-info: samplerate=48000;channels=2;bitrate=192
icy-br:192
icy-genre:Classical
icy-metadata:1
icy-name:NPO Radio4
icy-pub:0
icy-url:http://www.radio4.nl
Server: Icecast 2.4.0-kh8
Cache-Control: no-cache, no-store
Access-Control-Allow-Origin: *
Access-Control-Allow-Headers: Origin, Accept, X-Requested-With, Content-Type
Access-Control-Allow-Methods: GET, OPTIONS, HEAD
Connection: Close
Expires: Mon, 26 Jul 1997 05:00:00 GMT
icy-metaint:16000

PHP is adding his own headers.

You need to process the headers received from http://icecast.omroep.nl/radio4-bb-mp3 and return them using the method header() and then you can do the fpassthru().

HTTP separate the headers from the body with a new line: https://tools.ietf.org/html/rfc2616#section-6

[header]
CRLF
[body]

So it should be easy to parse line by line and calling header() until CRLF (empty line) is found and then trigger the fpassthru().