UPS servlet interaction with XML via PHP fsockopen

karateka · September 7th, 2004, 09:58 PM

So here's the deal. I'm trying to write a function that contacts a UPS servlet and sends it two sets of XML data via the HTTPS POST method.

Having no experience in both XML and manually creating HTTP(S) headers, I cut and pasted a http_post function that I found via our friends at google.com

With a little modification, it looks like this:

Code:

function http_post($server, $port, $url, $data) {
// example:
//  http_post(
//    "www.fat.com",
//    80, 
//    "/weightloss.pl", 
//    array("name" => "obese bob", "age" => "20")
//   or XML data
//    );
// $data can be a string or an array
//

  //$user_agent = "Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)";
  $user_agent = $_SERVER['HTTP_USER_AGENT'];
  $urlencoded = "";
  $fp = NULL;

  if ( is_array($data) ) {
    while (list($key,$value) = each($data))
      $urlencoded.= urlencode($key) . "=" . urlencode($value) . "&";
    $urlencoded = substr($urlencoded,0,-1);    
  }
  else {
    $urlencoded = $data;
  }

  $content_length = strlen($urlencoded);
  $headers = "POST $url HTTPS/1.1
Accept: */*
Content-Type: application/x-www-form-urlencoded
Content-Length: $content_length

";

  $fp = fsockopen($server, $port, $errno, $errstr, 15);

  if (!$fp) {
    return false;
  }

  fputs($fp, $headers);
  fputs($fp, $urlencoded);

  $ret = "";
  while ( !feof($fp) ) {
    $ret .= fgets($fp, 1024);
  }

  var_dump( stream_get_meta_data($fp) );

  return $ret;
}

The call to var_dump gives me

Code:

array(5) {
  ["stream_type"]=>  string(6) "socket"
  ["unread_bytes"]=>  int(0)
  ["timed_out"]=>  bool(false)
  ["blocked"]=>  bool(true)
  ["eof"]=>  bool(true)
}
string(147) "
Bad request

Your browser sent a query this server could not understand."

The data that I am sending with the HTTPS POST was provided from UPS and I simply copy and pasted it

Code:

$access_request=<<<EOF
<?xml version="1.0"?>
<AccessRequest xml:lang="en-US">
   <AccessLicenseNumber>TEST262223144CAT</AccessLicenseNumber>
   <UserId>Justin</UserId>
   <Password>password</Password>
</AccessRequest>
EOF;

But no matter what I do (which is very little from my lack off experience) I still get the "Bad request" error page. The UPS serlvet API documentation says that if an authentication error occurs or there is a general error with the posted XML, it will reply with XML containing the occured error(s).

So basically, does anything look wrong with the code that I have so far? I'm off to test the posting functionality on some of my scripts.

http://gha.booleangate.org
http://www.booleangate.org

karateka · September 7th, 2004, 10:00 PM

I tested the function using two files: post.php and dump.php and I get the output that I expected:

Code:

array(5) {
  ["stream_type"]=>
  string(6) "socket"
  ["unread_bytes"]=>
  int(0)
  ["timed_out"]=>
  bool(false)
  ["blocked"]=>
  bool(true)
  ["eof"]=>
  bool(true)
}
string(223) "HTTP/1.1 200 OK
Date: Tue, 07 Sep 2004 17:48:10 GMT
Server: Apache/1.3.29 (Darwin) PHP/4.3.4
X-Powered-By: PHP/4.3.4
Connection: close
Content-Type: text/html


array(1) {
  ["test"]=>
  string(4) "asdf"
}

"

I also updated the http_post function to look like this

Code:

function http_post($server, $port, $url, $data, $protocol="HTTP/1.0") {
// example:
//  http_post(
//    "www.fat.com",
//    80, 
//    "/weightloss.pl", 
//    array("name" => "obese bob", "age" => "20")
//   or XML data
//    );
// $data can be a string or an array
//

    //$user_agent = "Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)";
  $user_agent = $_SERVER['HTTP_USER_AGENT'];
    $urlencoded = "";
  $fp = NULL;

  if ( is_array($data) ) {
    while (list($key,$value) = each($data))
      $urlencoded.= urlencode($key) . "=" . urlencode($value) . "&";
    $urlencoded = substr($urlencoded,0,-1);    
  }
  else {
    $urlencoded = $data;
  }

    $content_length = strlen($urlencoded);
    $headers = "POST $url $protocol
Accept: */*
Content-Type: application/x-www-form-urlencoded
Content-Length: $content_length

";

  $fp = fsockopen($server, $port, $errno, $errstr, 15);

    if (!$fp) {
        return false;
    }

    fputs($fp, $headers);
    fputs($fp, $urlencoded);

    $ret = "";
    while ( !feof($fp) ) {
        $ret .= fgets($fp, 1024);
  }

  var_dump( stream_get_meta_data($fp) );

    return $ret;
}

Notice that I added the $protocol argument to the function so HTTP and HTTPS request can be made easily.

post.php looks like this

Code:

<pre><?php

require_once($_SERVER['DOCUMENT_ROOT']."/inc/php/net.php");


$data = array("test" => "asdf");

var_dump(
 http_post("127.0.0.1", 80, "/test/dump.php", $data)
);


?></pre\>

And dump.php looks like this

Code:

<pre><?php

var_dump($_REQUEST);

?></pre>

I tried posting the XML to UPS using HTTP but it just redirected me :(

http://gha.booleangate.org
http://www.booleangate.org

nikolai · October 20th, 2004, 12:24 PM

Have you tried playing with the cURL extension? It makes posting data via http/https pretty easy.
http://www.php.net/curl

Take care,

Nik
http://www.bigaction.org/