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<?php
/*
* Copyright 2010 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.
*/
if (!class_exists('UDP_Google_Client')) {
require_once dirname(__FILE__) . '/../autoload.php';
}
/**
* HTTP Request to be executed by IO classes. Upon execution, the
* responseHttpCode, responseHeaders and responseBody will be filled in.
*
* @author Chris Chabot <chabotc@google.com>
* @author Chirag Shah <chirags@google.com>
*
*/
class UDP_Google_Http_Request
{
const GZIP_UA = " (gzip)";
private $batchHeaders = array(
'Content-Type' => 'application/http',
'Content-Transfer-Encoding' => 'binary',
'MIME-Version' => '1.0',
);
protected $queryParams;
protected $requestMethod;
protected $requestHeaders;
protected $baseComponent = null;
protected $path;
protected $postBody;
protected $userAgent;
protected $canGzip = null;
protected $responseHttpCode;
protected $responseHeaders;
protected $responseBody;
protected $expectedClass;
protected $expectedRaw = false;
public $accessKey;
public function __construct(
$url,
$method = 'GET',
$headers = array(),
$postBody = null
) {
$this->setUrl($url);
$this->setRequestMethod($method);
$this->setRequestHeaders($headers);
$this->setPostBody($postBody);
}
/**
* Misc function that returns the base url component of the $url
* used by the OAuth signing class to calculate the base string
* @return string The base url component of the $url.
*/
public function getBaseComponent()
{
return $this->baseComponent;
}
/**
* Set the base URL that path and query parameters will be added to.
* @param $baseComponent string
*/
public function setBaseComponent($baseComponent)
{
$this->baseComponent = $baseComponent;
}
/**
* Enable support for gzipped responses with this request.
*/
public function enableGzip()
{
$this->setRequestHeaders(array("Accept-Encoding" => "gzip"));
$this->canGzip = true;
$this->setUserAgent($this->userAgent);
}
/**
* Disable support for gzip responses with this request.
*/
public function disableGzip()
{
if (
isset($this->requestHeaders['accept-encoding']) &&
$this->requestHeaders['accept-encoding'] == "gzip"
) {
unset($this->requestHeaders['accept-encoding']);
}
$this->canGzip = false;
$this->userAgent = str_replace(self::GZIP_UA, "", $this->userAgent);
}
/**
* Can this request accept a gzip response?
* @return bool
*/
public function canGzip()
{
return $this->canGzip;
}
/**
* Misc function that returns an array of the query parameters of the current
* url used by the OAuth signing class to calculate the signature
* @return array Query parameters in the query string.
*/
public function getQueryParams()
{
return $this->queryParams;
}
/**
* Set a new query parameter.
* @param $key - string to set, does not need to be URL encoded
* @param $value - string to set, does not need to be URL encoded
*/
public function setQueryParam($key, $value)
{
$this->queryParams[$key] = $value;
}
/**
* @return string HTTP Response Code.
*/
public function getResponseHttpCode()
{
return (int) $this->responseHttpCode;
}
/**
* @param int $responseHttpCode HTTP Response Code.
*/
public function setResponseHttpCode($responseHttpCode)
{
$this->responseHttpCode = $responseHttpCode;
}
/**
* @return $responseHeaders (array) HTTP Response Headers.
*/
public function getResponseHeaders()
{
return $this->responseHeaders;
}
/**
* @return string HTTP Response Body
*/
public function getResponseBody()
{
return $this->responseBody;
}
/**
* Set the class the response to this request should expect.
*
* @param $class string the class name
*/
public function setExpectedClass($class)
{
$this->expectedClass = $class;
}
/**
* Retrieve the expected class the response should expect.
* @return string class name
*/
public function getExpectedClass()
{
return $this->expectedClass;
}
/**
* Enable expected raw response
*/
public function enableExpectedRaw()
{
$this->expectedRaw = true;
}
/**
* Disable expected raw response
*/
public function disableExpectedRaw()
{
$this->expectedRaw = false;
}
/**
* Expected raw response or not.
* @return boolean expected raw response
*/
public function getExpectedRaw()
{
return $this->expectedRaw;
}
/**
* @param array $headers The HTTP response headers
* to be normalized.
*/
public function setResponseHeaders($headers)
{
$headers = Google_Utils::normalize($headers);
if ($this->responseHeaders) {
$headers = array_merge($this->responseHeaders, $headers);
}
$this->responseHeaders = $headers;
}
/**
* @param string $key
* @return array|boolean Returns the requested HTTP header or
* false if unavailable.
*/
public function getResponseHeader($key)
{
return isset($this->responseHeaders[$key])
? $this->responseHeaders[$key]
: false;
}
/**
* @param string $responseBody The HTTP response body.
*/
public function setResponseBody($responseBody)
{
$this->responseBody = $responseBody;
}
/**
* @return string $url The request URL.
*/
public function getUrl()
{
return $this->baseComponent . $this->path .
(count($this->queryParams) ?
"?" . $this->buildQuery($this->queryParams) :
'');
}
/**
* @return string $method HTTP Request Method.
*/
public function getRequestMethod()
{
return $this->requestMethod;
}
/**
* @return array $headers HTTP Request Headers.
*/
public function getRequestHeaders()
{
return $this->requestHeaders;
}
/**
* @param string $key
* @return array|boolean Returns the requested HTTP header or
* false if unavailable.
*/
public function getRequestHeader($key)
{
return isset($this->requestHeaders[$key])
? $this->requestHeaders[$key]
: false;
}
/**
* @return string $postBody HTTP Request Body.
*/
public function getPostBody()
{
return $this->postBody;
}
/**
* @param string $url the url to set
*/
public function setUrl($url)
{
if (substr($url, 0, 4) != 'http') {
// Force the path become relative.
if (substr($url, 0, 1) !== '/') {
$url = '/' . $url;
}
}
$parts = parse_url($url);
if (isset($parts['host'])) {
$this->baseComponent = sprintf(
"%s%s%s",
isset($parts['scheme']) ? $parts['scheme'] . "://" : '',
isset($parts['host']) ? $parts['host'] : '',
isset($parts['port']) ? ":" . $parts['port'] : ''
);
}
$this->path = isset($parts['path']) ? $parts['path'] : '';
$this->queryParams = array();
if (isset($parts['query'])) {
$this->queryParams = $this->parseQuery($parts['query']);
}
}
/**
* @param string $method Set he HTTP Method and normalize
* it to upper-case, as required by HTTP.
*
*/
public function setRequestMethod($method)
{
$this->requestMethod = strtoupper($method);
}
/**
* @param array $headers The HTTP request headers
* to be set and normalized.
*/
public function setRequestHeaders($headers)
{
$headers = Google_Utils::normalize($headers);
if ($this->requestHeaders) {
$headers = array_merge($this->requestHeaders, $headers);
}
$this->requestHeaders = $headers;
}
/**
* @param string $postBody the postBody to set
*/
public function setPostBody($postBody)
{
$this->postBody = $postBody;
}
/**
* Set the User-Agent Header.
* @param string $userAgent The User-Agent.
*/
public function setUserAgent($userAgent)
{
$this->userAgent = $userAgent;
if ($this->canGzip) {
$this->userAgent = $userAgent . self::GZIP_UA;
}
}
/**
* @return string The User-Agent.
*/
public function getUserAgent()
{
return $this->userAgent;
}
/**
* Returns a cache key depending on if this was an OAuth signed request
* in which case it will use the non-signed url and access key to make this
* cache key unique per authenticated user, else use the plain request url
* @return string The md5 hash of the request cache key.
*/
public function getCacheKey()
{
$key = $this->getUrl();
if (isset($this->accessKey)) {
$key .= $this->accessKey;
}
if (isset($this->requestHeaders['authorization'])) {
$key .= $this->requestHeaders['authorization'];
}
return md5($key);
}
public function getParsedCacheControl()
{
$parsed = array();
$rawCacheControl = $this->getResponseHeader('cache-control');
if ($rawCacheControl) {
$rawCacheControl = str_replace(', ', '&', $rawCacheControl);
parse_str($rawCacheControl, $parsed);
}
return $parsed;
}
/**
* @param string $id
* @return string A string representation of the HTTP Request.
*/
public function toBatchString($id)
{
$str = '';
$path = parse_url($this->getUrl(), PHP_URL_PATH) . "?" .
http_build_query($this->queryParams);
$str .= $this->getRequestMethod() . ' ' . $path . " HTTP/1.1\n";
foreach ($this->getRequestHeaders() as $key => $val) {
$str .= $key . ': ' . $val . "\n";
}
if ($this->getPostBody()) {
$str .= "\n";
$str .= $this->getPostBody();
}
$headers = '';
foreach ($this->batchHeaders as $key => $val) {
$headers .= $key . ': ' . $val . "\n";
}
$headers .= "Content-ID: $id\n";
$str = $headers . "\n" . $str;
return $str;
}
/**
* Our own version of parse_str that allows for multiple variables
* with the same name.
* @param $string - the query string to parse
*/
private function parseQuery($string)
{
$return = array();
$parts = explode("&", $string);
foreach ($parts as $part) {
list($key, $value) = explode('=', $part, 2);
$value = urldecode($value);
if (isset($return[$key])) {
if (!is_array($return[$key])) {
$return[$key] = array($return[$key]);
}
$return[$key][] = $value;
} else {
$return[$key] = $value;
}
}
return $return;
}
/**
* A version of build query that allows for multiple
* duplicate keys.
* @param $parts array of key value pairs
*/
private function buildQuery($parts)
{
$return = array();
foreach ($parts as $key => $value) {
if (is_array($value)) {
foreach ($value as $v) {
$return[] = urlencode($key) . "=" . urlencode($v);
}
} else {
$return[] = urlencode($key) . "=" . urlencode($value);
}
}
return implode('&', $return);
}
/**
* If we're POSTing and have no body to send, we can send the query
* parameters in there, which avoids length issues with longer query
* params.
*/
public function maybeMoveParametersToBody()
{
if ($this->getRequestMethod() == "POST" && empty($this->postBody)) {
$this->setRequestHeaders(
array(
"content-type" =>
"application/x-www-form-urlencoded; charset=UTF-8"
)
);
$this->setPostBody($this->buildQuery($this->queryParams));
$this->queryParams = array();
}
}
}