How to properly send and receive XML using curl? - php

Question

I've been trying to post XML and get response from the server but with no luck.
Here are the conditions on server side:
Requests to the server should be sent as XML over HTTP 1.1.
The following requirements apply to the HTTP request:
The request type should be POST;
A Content-Length header should be present, and the total length of the request should be below 16KB;
A Content-Type header should be present, containing the media type value text/xml;
Here is my script:
$url = "http://somedomain.com";
$xml = '<?xml version="1.0" encoding="UTF-8"?>
<Request PartnerID="asasdsadsa" Type="TrackSearch"> <TrackSearch> <Title>love</Title> <Tags> <MainGenre>Blues</MainGenre> </Tags> <Page Number="1" Size="20"/> </TrackSearch> </Request>';
$header = "POST HTTP/1.1 \r\n";
$header .= "Content-type: text/xml \r\n";
$header .= "Content-length: ".strlen($xml)." \r\n";
$header .= "Connection: close \r\n\r\n";
$header .= $xml;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $header);
$data = curl_exec($ch);
echo $data;
if(curl_errno($ch))
print curl_error($ch);
else
curl_close($ch);
This gives me:
HTTP Error 400. The request URL is invalid.
Bad Request - Invalid URL

Answer 1

Does this help?
<?php
$url = "http://stackoverflow.com";
$xml = '<?xml version="1.0" encoding="UTF-8"?><Request PartnerID="asasdsadsa" Type="TrackSearch"> <TrackSearch> <Title>love</Title> <Tags> <MainGenre>Blues</MainGenre> </Tags> <Page Number="1" Size="20"/> </TrackSearch> </Request>';
$headers = array(
"Content-type: text/xml",
"Content-length: " . strlen($xml),
"Connection: close",
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$data = curl_exec($ch);
echo $data;
if(curl_errno($ch))
print curl_error($ch);
else
curl_close($ch);
?>

Answer 2

From the documentation.
CURLOPT_CUSTOMREQUEST
A custom request method to use instead of "GET"
or "HEAD" when doing a HTTP request. This is useful for doing "DELETE"
or other, more obscure HTTP requests. Valid values are things like
"GET", "POST", "CONNECT" and so on; i.e. Do not enter a whole HTTP
request line here. For instance, entering "GET /index.html
HTTP/1.0\r\n\r\n" would be incorrect.
The parameter for CURLOPT_CUSTOMREQUEST should be simply POST and you can use CURLOPT_HTTPHEADER to set headers.