这里简单介绍个接口实例。
以下代码是 RESTful 服务类 Site.php：
实例
<?php /* * RESTful 服务类 */ Class Site { private $sites = array( 1 => 'TaoBao', 2 => 'Google', 3 => 'Runoob', 4 => 'Baidu', 5 => 'Weibo', 6 => 'Sina' ); public function getAllSite(){ return $this->sites; } public function getSite($id){ $site = array($id => ($this->sites[$id]) ? $this->sites[$id] : $this->sites[1]); return $site; } } ?>
RESTful Services URI 映射
RESTful Services URI 应该设置为一个直观简短的资源地址。Apache 服务器的 .htaccess 应设置好对应的 Rewrite 规则。
本实例我们将使用两个 URI 规则：
1、获取所有站点列表：
http://localhost/restexample/site/list/
2、使用 id 获取指定的站点，以下 URI 为获取 id 为 3 的站点：
http://localhost/restexample/site/list/3/
项目的 .htaccess 文件配置规则如下所示：
# 开启 rewrite 功能 Options +FollowSymlinks RewriteEngine on # 重写规则 RewriteRule ^site/list/$ RestController.php?view=all [nc,qsa] RewriteRule ^site/list/([0-9]+)/$ RestController.php?view=single&id=$1 [nc,qsa]
RESTful Web Service 控制器
在 .htaccess 文件中，我们通过设置参数 'view' 来获取 RestController.php 文件中对应的请求，通过获取 'view' 不同的参数来分发到不同的方法上。RestController.php 文件代码如下：
实例
<?php require_once("SiteRestHandler.php"); $view = ""; if(isset($_GET["view"])) $view = $_GET["view"]; /* * RESTful service 控制器 * URL 映射 */ switch($view){ case "all": // 处理 REST Url /site/list/ $siteRestHandler = new SiteRestHandler(); $siteRestHandler->getAllSites(); break; case "single": // 处理 REST Url /site/show/<id>/ $siteRestHandler = new SiteRestHandler(); $siteRestHandler->getSite($_GET["id"]); break; case "" : //404 - not found; break; } ?>
简单的 RESTful 基础类
以下提供了 RESTful 的一个基类，用于处理响应请求的 HTTP 状态码，SimpleRest.php 文件代码如下：
实例
<?php /* * 一个简单的 RESTful web services 基类 * 我们可以基于这个类来扩展需求 */ class SimpleRest { private $httpVersion = "HTTP/1.1"; public function setHttpHeaders($contentType, $statusCode){ $statusMessage = $this -> getHttpStatusMessage($statusCode); header($this->httpVersion. " ". $statusCode ." ". $statusMessage); header("Content-Type:". $contentType); } public function getHttpStatusMessage($statusCode){ $httpStatus = array( 100 => 'Continue', 101 => 'Switching Protocols', 200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content', 300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 306 => '(Unused)', 307 => 'Temporary Redirect', 400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Timeout', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Long', 415 => 'Unsupported Media Type', 416 => 'Requested Range Not Satisfiable', 417 => 'Expectation Failed', 500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Timeout', 505 => 'HTTP Version Not Supported'); return ($httpStatus[$statusCode]) ? $httpStatus[$statusCode] : $status[500]; } } ?>
RESTful Web Service 处理类
以下是一个 RESTful Web Service 处理类 SiteRestHandler.php，继承了上面我们提供的 RESTful 基类，类中通过判断请求的参数来决定返回的 HTTP 状态码及数据格式，实例中我们提供了三种数据格式： "application/json" 、 "application/xml" 或 "text/html"：
SiteRestHandler.php 文件代码如下:
实例
<?php require_once("SimpleRest.php"); require_once("Site.php"); class SiteRestHandler extends SimpleRest { function getAllSites() { $site = new Site(); $rawData = $site->getAllSite(); if(empty($rawData)) { $statusCode = 404; $rawData = array('error' => 'No sites found!'); } else { $statusCode = 200; } $requestContentType = $_SERVER['HTTP_ACCEPT']; $this ->setHttpHeaders($requestContentType, $statusCode); if(strpos($requestContentType,'application/json') !== false){ $response = $this->encodeJson($rawData); echo $response; } else if(strpos($requestContentType,'text/html') !== false){ $response = $this->encodeHtml($rawData); echo $response; } else if(strpos($requestContentType,'application/xml') !== false){ $response = $this->encodeXml($rawData); echo $response; } } public function encodeHtml($responseData) { $htmlResponse = "<table border='1'>"; foreach($responseData as $key=>$value) { $htmlResponse .= "<tr><td>". $key. "</td><td>". $value. "</td></tr>"; } $htmlResponse .= "</table>"; return $htmlResponse; } public function encodeJson($responseData) { $jsonResponse = json_encode($responseData); return $jsonResponse; } public function encodeXml($responseData) { // 创建 SimpleXMLElement 对象 $xml = new SimpleXMLElement('<?xml version="1.0"?><site></site>'); foreach($responseData as $key=>$value) { $xml->addChild($key, $value); } return $xml->asXML(); } public function getSite($id) { $site = new Site(); $rawData = $site->getSite($id); if(empty($rawData)) { $statusCode = 404; $rawData = array('error' => 'No sites found!'); } else { $statusCode = 200; } $requestContentType = $_SERVER['HTTP_ACCEPT']; $this ->setHttpHeaders($requestContentType, $statusCode); if(strpos($requestContentType,'application/json') !== false){ $response = $this->encodeJson($rawData); echo $response; } else if(strpos($requestContentType,'text/html') !== false){ $response = $this->encodeHtml($rawData); echo $response; } else if(strpos($requestContentType,'application/xml') !== false){ $response = $this->encodeXml($rawData); echo $response; } } } ?>
最后我们这样访问我们写的接口
http://localhost/site/list/ http://localhost/site/list/1/
本文代码来自 W3C 菜鸟教程
