first commit

CloudFront.php

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+<?php
+
+/**
+ * A PHP5 class for invalidating Amazon CloudFront objects via its API.
+ */
+
+require_once 'HTTP/Request.php';  // grab with "pear install --onlyreqdeps HTTP_Request"
+
+
+class CloudFront {
+
+	var $serviceUrl;
+	var $accessKeyId;
+	var $responseBody;
+	var $responseCode;
+	var $parsedXml;
+	var $distributionId;
+
+
+	/**
+	 * Constructs a CloudFront object
+	 * @param $accessKeyId
+	 * @param $secretKey
+	 * @param $serviceUrl
+	 * @param $distributionId
+	 */
+	function __construct($accessKeyId, $secretKey, $serviceUrl="https://cloudfront.amazonaws.com/", $distributionId){
+		$this->serviceUrl     = $serviceUrl;
+		$this->accessKeyId    = $accessKeyId;
+		$this->secretKey      = $secretKey;
+		$this->distributionId = $distributionId;
+	}
+
+
+	/**
+	 * invalidateObject() Invalidates object with passed key on CloudFront
+	 * @param $key 	{String} Key of file to be deleted
+	 */   
+	function invalidateObject($key){
+		$key        = "/".$key;
+		$httpDate   = gmdate("D, d M Y G:i:s T");		
+		$requestUrl = $this->serviceUrl."2010-08-01/distribution/" . $this->distributionId . "/invalidation";
+		$body       = "<InvalidationBatch><Path>".$key."</Path><CallerReference>".time()."</CallerReference></InvalidationBatch>";
+		$req        = & new HTTP_Request($requestUrl);
+		$req->setMethod("POST");
+		$req->addHeader("Date", $httpDate);
+		$req->addHeader("Authorization", $this->makeKey($httpDate));
+		$req->addHeader("Content-Type", "text/xml");
+		$req->setBody($body);
+		$response           = $req->sendRequest();
+		$this->responseBody = $req->getResponseBody();		
+		// for debugging...		
+		// $this->responseCode = $req->getResponseCode();
+		// $this->parsedXml    = simplexml_load_string($this->responseBody);
+		// $er = array();
+		// array_push($er, "CloudFront: Invalidating Object: $key");
+		// array_push($er, $requestUrl);
+		// array_push($er, "body: $body");
+		// array_push($er, "response: $response");
+		// array_push($er, "response string: " . $this->responseBody);
+		// array_push($er, "");
+		// array_push($er, "response code: " . $this->responseCode);
+		// array_push($er, "");
+		// return implode("\n",$er);
+		return ($this->responseCode === 201){
+	}
+
+
+	/**
+	 * makeKey() Returns header string containing encoded authentication key
+	 * @param 	$date 
+	 * @return 	{String}
+	 */
+	function makeKey($date){
+		return "AWS " . $this->accessKeyId . ":" . base64_encode($this->hmacSha1($this->secretKey, $date));
+	}
+
+
+	/**
+	 * hmacSha1() Returns HMAC string
+	 * @param 	$key
+	 * @param 	$data	 
+	 * @return 	{String}
+	 */	
+	function hmacSha1($key, $date){
+		$blocksize = 64;
+		$hashfunc  = 'sha1';
+		if (strlen($key)>$blocksize){
+			$key = pack('H*', $hashfunc($key));
+		}
+		$key  = str_pad($key,$blocksize,chr(0x00));
+		$ipad = str_repeat(chr(0x36),$blocksize);
+		$opad = str_repeat(chr(0x5c),$blocksize);
+		$hmac = pack('H*', $hashfunc( ($key^$opad).pack('H*',$hashfunc(($key^$ipad).$date)) ));
+		return $hmac;
+	}
+}
+?>	

README

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+A PHP5 class for invalidating Amazon CloudFront objects via its API.