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<?php
/* Copyright (c) 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Author: Eric Bidelman <e.bidelman@google.com>
*/
$PRIV_KEY_FILE = '/path/to/your/rsa_private_key.pem';
// OAuth library - http://oauth.googlecode.com/svn/code/php/
require_once('OAuth.php');
// Google's accepted signature methods
$hmac_method = new OAuthSignatureMethod_HMAC_SHA1();
$rsa_method = new OAuthSignatureMethod_RSA_SHA1();
$SIG_METHODS = array($rsa_method->get_name() => $rsa_method,
$hmac_method->get_name() => $hmac_method);
/**
* Makes an HTTP request to the specified URL
*
* @param string $http_method The HTTP method (GET, POST, PUT, DELETE)
* @param string $url Full URL of the resource to access
* @param array $extraHeaders (optional) Additional headers to include in each
* request. Elements are header/value pair strings ('Host: example.com')
* @param string $postData (optional) POST/PUT request body
* @param bool $returnResponseHeaders True if resp. headers should be returned.
* @return string Response body from the server
*/
function send_signed_request($http_method, $url, $extraHeaders=null,
$postData=null, $returnResponseHeaders=true) {
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_FAILONERROR, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
// Return request headers in the reponse
// curl_setopt($curl, CURLINFO_HEADER_OUT, true);
// Return response headers ni the response?
if ($returnResponseHeaders) {
curl_setopt($curl, CURLOPT_HEADER, true);
}
$headers = array();
//$headers[] = 'GData-Version: 2.0'; // use GData v2 by default
if (is_array($extraHeaders)) {
$headers = array_merge($headers, $extraHeaders);
}
// Setup default curl options for each type of HTTP request.
// This is also a great place to add additional headers for each request.
switch($http_method) {
case 'GET':
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
break;
case 'POST':
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
break;
case 'PUT':
$headers[] = 'If-Match: *';
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $http_method);
curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
break;
case 'DELETE':
$headers[] = 'If-Match: *';
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $http_method);
break;
default:
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
}
// Execute the request. If an error occures, fill the response body with it.
$response = curl_exec($curl);
if (!$response) {
$response = curl_error($curl);
}
// Add server's response headers to our response body
$response = curl_getinfo($curl, CURLINFO_HEADER_OUT) . $response;
curl_close($curl);
return $response;
}
/**
* Takes XML as a string and returns it nicely indented
*
* @param string $xml The xml to beautify
* @param boolean $html_output True if returned XML should be escaped for HTML.
* @return string The beautified xml
*/
function xml_pretty_printer($xml, $html_output=false) {
$xml_obj = new SimpleXMLElement($xml);
$level = 2;
// Get an array containing each XML element
$xml = explode("\n", preg_replace('/>\s*</', ">\n<", $xml_obj->asXML()));
// Hold current indentation level
$indent = 0;
$pretty = array();
// Shift off opening XML tag if present
if (count($xml) && preg_match('/^<\?\s*xml/', $xml[0])) {
$pretty[] = array_shift($xml);
}
foreach ($xml as $el) {
if (preg_match('/^<([\w])+[^>\/]*>$/U', $el)) {
// opening tag, increase indent
$pretty[] = str_repeat(' ', $indent) . $el;
$indent += $level;
} else {
if (preg_match('/^<\/.+>$/', $el)) {
$indent -= $level; // closing tag, decrease indent
}
if ($indent < 0) {
$indent += $level;
}
$pretty[] = str_repeat(' ', $indent) . $el;
}
}
$xml = implode("\n", $pretty);
return $html_output ? htmlentities($xml) : $xml;
}
/**
* Joins key/value pairs by $inner_glue and each pair together by $outer_glue.
*
* Example: implode_assoc('=', '&', array('a' => 1, 'b' => 2)) === 'a=1&b=2'
*
* @param string $inner_glue What to implode each key/value pair with
* @param string $outer_glue What to impode each key/value string subset with
* @param array $array Associative array of query parameters
* @return string Urlencoded string of query parameters
*/
function implode_assoc($inner_glue, $outer_glue, $array) {
$output = array();
foreach($array as $key => $item) {
$output[] = $key . $inner_glue . urlencode($item);
}
return implode($outer_glue, $output);
}
/**
* Explodes a string of key/value url parameters into an associative array.
* This method performs the compliment operations of implode_assoc().
*
* Example: explode_assoc('=', '&', 'a=1&b=2') === array('a' => 1, 'b' => 2)
*
* @param string $inner_glue What each key/value pair is joined with
* @param string $outer_glue What each set of key/value pairs is joined with.
* @param array $array Associative array of query parameters
* @return array Urlencoded string of query parameters
*/
function explode_assoc($inner_glue, $outer_glue, $params) {
$tempArr = explode($outer_glue, $params);
foreach($tempArr as $val) {
$pos = strpos($val, $inner_glue);
$key = substr($val, 0, $pos);
$array2[$key] = substr($val, $pos + 1, strlen($val));
}
return $array2;
}
?>
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