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Posted by webEater on 10/31/16 11:59
Hey,
I am writing a file that reads in an external file in the web and
prints it out including the response header of the http protocol. I do
this to enable cross domain XMLHttpRequests.
I implemented it via fsockopen, like this:
<?
$url = $_REQUEST['uri']; // take the param as $uri
//... more ...
if ($c = fsockopen($host, $port, $errorNo, $errorStr, 5)) { //
connection
$headers = getallheaders(); // request headers
$h = ($headers['Content-Type'] ==
'application/x-www-form-urlencoded') ? 'POST' : 'GET'; // request
method
$h .= " $path HTTP/1.1\r\nHost: $host\r\n";
foreach ($headers as $name => $content) {
// don't forward user's (and your) cookies to external server!
if ($name == 'Accept')
$h .= 'Accept:
text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*;q=0.5'."\r\n";
elseif ($name == 'Accept-Encoding')
$h .= 'Accept-Encoding: '."\r\n";
elseif ($name != 'Host' && $name != 'Connection' && $name !=
'Cookie')
$h .= $name.': '.$content."\r\n";
}
$h .= 'Connection: closed'."\r\n";
$h .= "\r\n";
// header sent
// post content
if ($_POST) {
$posts = array();
foreach ($_POST as $key => $value)
$posts[] = urlencode($key).'='.urlencode($value);
$h .= implode('&', $posts);
}
fwrite($c, $h);
// read and output results
$header = true;
while (!feof($c)) {
$p = fgets($c);
if ($p == "\r\n")
$header = false;
if ($header) {
if (strpos($p, 'Content-Type') !== false && $html)
header(str_replace('xml', 'html', $p));
else
header(trim($p));
}
else
echo $p;
}
}
fclose($c);
}
else
echo $errorNo.' '.$errorStr;
}
?>
^ Thats the code, test it in Firefox and IE:
http://aka-fotos.de/research/uniajax/php/http.php?uri=http%3A%2F%2Faka-fotos.de%2Fresearch%2Funiajax%2FresponseXml.php
It means that http.php reads the file
http://aka-fotos.de/research/uniajax/responseXml, a simple XML file
that looks like this:
<?xml version="1.0" encoding="utf-8"?><response>hello</response>
Firefox shows the correct source code, exactly the same as above ^, but
IE shows an error (cannot find the page). To get to the bottom auf
things I used Rex Swains HTTP viewer that shows me all headers of a
http request including the body of the page:
http://rexswain.com/httpview.html. If you paste in my adress -
http://aka-fotos.de/research/uniajax/php/http.php?uri=http%3A%2F%2Faka-fotos.de%2Fresearch%2Funiajax%2FresponseXml.php
- and submit the form, you will see that the response body looks like
this:
(CR)(LF)
26·(CR)(LF)
<?xml·version="1.0"·encoding="utf-8"?>(CR)(LF)
1b·(CR)(LF)
<response>hello</response>(LF)
(CR)(LF)
0(CR)(LF)
(CR)(LF)
(CR) and (LF) are control characters, forget them, but I see some
charakters "26" and "1b". This result differs from what Firefox shows,
can somebody say me whats going on there?
I hope somebody can help me!
Thanks,
Andi
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