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PHP應用：php實現(xiàn)的一個簡單json rpc框架實例

作者：VEPHP   時間 2017-10-19

《PHP應用：php實現(xiàn)的一個簡單json rpc框架實例》要點：
本文介紹了PHP應用：php實現(xiàn)的一個簡單json rpc框架實例，希望對您有用。如果有疑問，可以聯(lián)系我們。

json rpc 是一種以json為消息格式的遠程調用服務,它是一套允許運行在分歧操作系統(tǒng)、分歧環(huán)境的程序實現(xiàn)基于Internet過程調用的規(guī)范和一系列的實現(xiàn).這種遠程過程調用可以使用http作為傳輸協(xié)議,也可以使用其它傳輸協(xié)議,傳輸?shù)膬热菔莏son消息體.PHP實戰(zhàn)

下面我們code一套基于php的rpc框架,此框架中包括rpc的服務端server,和應用端client；PHP實戰(zhàn)

(一)PHP服務端RPCserver jsonRPCServer.phpPHP實戰(zhàn)

代碼如下:

class jsonRPCServer {
??? /**
???? *處理一個request類,這個類中綁定了一些哀求參數(shù)
???? * @param object $object
???? * @return boolean
???? */
??? public static function handle($object) {
?????? // 判斷是否是一個rpc json哀求
??????? if ($_SERVER['REQUEST_METHOD'] != 'POST' || empty($_SERVER['CONTENT_TYPE'])
??????????? ||$_SERVER['CONTENT_TYPE'] != 'application/json') {
??????????? return false;
??????? }
??????? // reads the input data
??????? $request = json_decode(file_get_contents('php://input'),true);
??????? // 執(zhí)行哀求類中的接口
??????? try {
??????????? if ($result = @call_user_func_array(array($object,$request['method']),$request['params'])) {
??????????????? $response = array ( 'id'=> $request['id'],'result'=> $result,'error'=> NULL );
??????????? } else {
??????????????? $response = array ( 'id'=> $request['id'], 'result'=> NULL,
??????????????????????????????????????? 'error' => 'unknown method or incorrect parameters' );}
??????? } catch (Exception $e) {
??????????? $response = array ('id' => $request['id'],'result' => NULL, 'error' =>$e->getMessage());
??????? }
?????? // json 格式輸出
??????? if (!empty($request['id'])) { // notifications don't want response
??????????? header('content-type: text/javascript');
??????????? echo json_encode($response);
??????? }
??????? return true;
??? }
}

(二)Rpc客戶端,jsonRPCClient.php
PHP實戰(zhàn)

代碼如下:

<?php
/*
?*/
class jsonRPCClient {

??? private $debug;
??? private $url;
??? // 哀求id
??? private $id;
??? private $notification = false;
??? /**
???? * @param $url
???? * @param bool $debug
???? */
??? public function __construct($url,$debug = false) {
??????? // server URL
??????? $this->url = $url;
??????? // proxy
??????? empty($proxy) ? $this->proxy = '' : $this->proxy = $proxy;
??????? // debug state
??????? empty($debug) ? $this->debug = false : $this->debug = true;
??????? // message id
??????? $this->id = 1;
??? }PHP實戰(zhàn)

??? /**
???? *
???? * @param boolean $notification
???? */
??? public function setRPCNotification($notification) {
??????? empty($notification) ? $this->notification = false? : $this->notification = true;
??? }PHP實戰(zhàn)

??? /**
???? * @param $method
???? * @param $params
???? * @return bool
???? * @throws Exception
???? */
??? public function __call($method,$params) {
??????? // 查驗request信息
??????? if (!is_scalar($method)) {
??????????? throw new Exception('Method name has no scalar value');
??????? }
??????? if (is_array($params)) {
??????????? $params = array_values($params);
??????? } else {
??????????? throw new Exception('Params must be given as array');
??????? }PHP實戰(zhàn)

??????? if ($this->notification) {
??????????? $currentId = NULL;
??????? } else {
??????????? $currentId = $this->id;
??????? }PHP實戰(zhàn)

?????? // 拼裝成一個request哀求
??????? $request = array(? 'method' => $method,? 'params' => $params,'id' => $currentId);
??????? $request = json_encode($request);
??????? $this->debug && $this->debug.='***** Request *****'."\n".$request."\n".'***** End Of request *****'."\n\n";
??????? $opts = array ('http' => array (
??????????????????????????????????? 'method'? => 'POST',
??????????????????????????????????? 'header'? => 'Content-type: application/json',
??????????????????????????????????? 'content' => $request
??????? ));
??????? //? 關鍵幾部
??????? $context? = stream_context_create($opts);
??if ( $result = file_get_contents($this->url, false, $context)) {
??????????? $response = json_decode($result,true);
??} else {
???throw new Exception('Unable to connect to '.$this->url);
??}
??????? // 輸出調試信息
??????? if ($this->debug) {
??????????? echo nl2br(($this->debug));
??????? }
??????? // 檢驗response信息
??????? if (!$this->notification) {
??????????? // check
??????????? if ($response['id'] != $currentId) {
??????????????? throw new Exception('Incorrect response id (request id: '.$currentId.', response id: '.$response['id'].')');
??????????? }
??????????? if (!is_null($response['error'])) {
??????????????? throw new Exception('Request error: '.$response['error']);
??????????? }
??????????? return $response['result'];PHP實戰(zhàn)

??????? } else {
??????????? return true;
??????? }
??? }
}
?>
PHP實戰(zhàn)

(三) 應用實例
(1)服務端 server.php
PHP實戰(zhàn)

代碼如下:

<?php
require_once 'jsonRPCServer.php';
代碼如下:

// member 為測試類
require 'member.php';
// 服務端挪用
$myExample = new member();
// 注入實例
jsonRPCServer::handle($myExample)
?or print 'no request';
?>

(2)測試類文件,member.php
PHP實戰(zhàn)

代碼如下:

class member{
??? public function getName(){
??????? return 'hello word ' ;? // 返回字符串
??? }
}

(3)客戶端 client.php
PHP實戰(zhàn)

代碼如下:

require_once 'jsonRPCClient.php';

$url = 'http://localhost/rpc/server.php';
$myExample = new jsonRPCClient($url);PHP實戰(zhàn)

// 客戶端挪用
try {
?$name = $myExample->getName();
??? echo $name ;
} catch (Exception $e) {
?echo nl2br($e->getMessage()).'<br />'."\n";
}
PHP實戰(zhàn)

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