PHP implementation of a simple JSON RPC framework instance, JSONRPC Framework instance _php Tutorial

PHP implementation of a simple JSON RPC framework instance, JSONRPC framework instance

JSON RPC is a remote invocation service in the form of a JSON message, which is a set of specifications and a series of implementations that allow programs that run on different operating systems, in different environments, to implement Internet-based procedure calls. This remote procedure call can use HTTP as the transport protocol, or it can use other transport protocols, and the content of the transfer is the JSON message body.

Below we code a set of PHP-based RPC framework, which contains RPC server servers, and application-side client;

(a) PHP server Rpcserver jsonrpcserver.php

Copy CodeThe code is as follows:
Class Jsonrpcserver {
/**
* Processing a request class in which a number of requests parameters are bound
* @param object $object
* @return Boolean
*/
public static function handle ($object) {
Determine if it is an RPC JSON request
if ($_server[' request_method '! = ' POST ' | | empty ($_server[' content_type '])
|| $_server[' Content_Type ']! = ' Application/json ') {
return false;
}
Reads the input data
$request = Json_decode (file_get_contents (' Php://input '), true);
Executing an interface in a request class
try {
if ($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 ' = $e->getmessage ());
}
JSON format output
if (!empty ($request [' ID '])) {//notifications don ' t want response
Header (' Content-type:text/javascript ');
echo Json_encode ($response);
}
return true;
}
}

Two RPC Client, jsonrpcclient.php
Copy the Code code as follows:
<?php
/*
*/
Class Jsonrpcclient {

Private $debug;
Private $url;
Request 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;
}

/**
*
* @param boolean $notification
*/
Public Function Setrpcnotification ($notification) {
Empty ($notification)? $this->notification = false: $this->notification = true;
}

/**
* @param $method
* @param $params
* @return BOOL
* @throws Exception
*/
Public Function __call ($method, $params) {
Check request Information
if (!is_scalar ($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 ');
}

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

Assemble as a request
$request = Array (' method ' = = $method, ' params ' + $params, ' id ' = $currentId);
$request = Json_encode ($request);
$this->debug && $this->debug.= ' * * * * * * * * * * * *. \ n ". $request." \ n "." End of Request * * * * *. " \ n ";
$opts = Array (' http ' = = Array (
' Method ' = ' POST ',
' Header ' = ' Content-type:application/json ',
' Content ' = $request
));
Key several
$context = Stream_context_create ($opts);
if ($result = file_get_contents ($this->url, False, $context)) {
$response = Json_decode ($result, true);
} else {
throw new Exception (' Unable to connect to '. $this->url);
}
Output Debugging information
if ($this->debug) {
Echo nl2br (($this->debug));
}
Inspection response Information
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 '];

} else {
return true;
}
}
}
?>

(c) Application examples
(1) Service End server.php
Copy the Code code as follows:
<?php
Require_once ' jsonrpcserver.php ';

Copy the Code code as follows:
Member for Test class
Require ' member.php ';
Service-side invocation
$myExample = new Member ();
Inject instance
Jsonrpcserver::handle ($myExample)
or print ' no request ';
?>

(2) Test class file, member.php
Copy the Code code as follows:
Class member{
Public Function GetName () {
Return ' Hello word '; return string
}
}

(3) Client client.php
Copy the Code code as follows:
Require_once ' jsonrpcclient.php ';

$url = ' http://localhost/rpc/server.php ';
$myExample = new Jsonrpcclient ($url);

Client Calls
try {
$name = $myExample->getname ();
Echo $name;
} catch (Exception $e) {
Echo nl2br ($e->getmessage ()). '
'." \ n ";
}

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