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WSDL(网络服务描述语言,Web Services Description Language)是一门基于 XML 的语言,用于描述 Web Services 以及如何对它们进行访问。这种文档可描述某个 Web service。它可规定服务的位置,以及此服务提供的操作(或方法)。
一个 WSDL 文档的主要结构是类似这样的:
<definitions> <types> definition of types........ </types> <message> definition of a message.... </message> <portType> definition of a port....... </portType> <binding> definition of a binding.... </binding></definitions>
WSDL 文档可包含其它的元素,比如 extension 元素,以及一个 service 元素,此元素可把若干个 web services 的定义组合在一个单一的 WSDL 文档中。
类代码(SoapDiscovery.class.php):
<?phpclass SoapDiscovery { private $class_name = ''; private $service_name = ''; /** * SoapDiscovery::__construct() SoapDiscovery class Constructor. * * @param string $class_name * @param string $service_name **/ public function __construct($class_name = '', $service_name = '') { $this->class_name = $class_name; $this->service_name = $service_name; } /** * SoapDiscovery::getWSDL() Returns the WSDL of a class if the class is instantiable. * * @return string **/ public function getWSDL() { if (empty($this->service_name)) { throw new Exception('No service name.'); } $headerWSDL = "<?xml version="1.0" ?>n"; $headerWSDL.= "<definitions name="$this->service_name" targetnamespace="urn:$this->service_name" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="urn:$this->service_name" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap-enc="http://schemas.xmlsoap.org/soap/encoding/" xmlns="http://schemas.xmlsoap.org/wsdl/">n"; $headerWSDL.= "<types xmlns="http://schemas.xmlsoap.org/wsdl/"></types>n"; if (empty($this->class_name)) { throw new Exception('No class name.'); } $class = new ReflectionClass($this->class_name); if (!$class->isInstantiable()) { throw new Exception('Class is not instantiable.'); } $methods = $class->getMethods(); $portTypeWSDL = '<porttype name="'.$this->service_name.'Port">'; $bindingWSDL = '<binding name="'.$this->service_name.'Binding" type="tns:'.$this->service_name." port>n<binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"></binding>n"; $serviceWSDL = '<service name="'.$this->service_name.">n<documentation></documentation>n<port name="" .>service_name.'Port" binding="tns:'.$this->service_name."Binding"><address location="http://" .></address>n</port>n</service>n"; $messageWSDL = ''; foreach ($methods as $method) { if ($method->isPublic() && !$method->isConstructor()) { $portTypeWSDL.= '<operation name="'.$method->getName().">n".'<input message="tns:'.$method->getName()." request>n<output message="tns:" .>getName()."Response" />n</output></operation>n"; $bindingWSDL.= '<operation name="'.$method->getName().">n".'<operation soapaction="urn:'.$this->service_name.'#'.$this->class_name.'#'.$method->getName()."></operation>n<input><body use="encoded" namespace="urn:$this->service_name" encodingstyle="http://schemas.xmlsoap.org/soap/encoding/"></body>nn<output>n<body use="encoded" namespace="urn:$this->service_name" encodingstyle="http://schemas.xmlsoap.org/soap/encoding/"></body>n</output>n</operation>n"; $messageWSDL.= '<message name="'.$method->getName()." request>n"; $parameters = $method->getParameters(); foreach ($parameters as $parameter) { $messageWSDL.= '<part name="'.$parameter->getName()." type="xsd:string"></part>n"; } $messageWSDL.= "</message>n"; $messageWSDL.= '<message name="'.$method->getName()." response>n"; $messageWSDL.= '<part name="'.$method->getName()." type="xsd:string"></part>n"; $messageWSDL.= "</message>n"; } } $portTypeWSDL.= "</binding></porttype>n"; $bindingWSDL.= "n"; return sprintf('%s%s%s%s%s%s', $headerWSDL, $portTypeWSDL, $bindingWSDL, $serviceWSDL, $messageWSDL, '</definitions>'); } /** * SoapDiscovery::getDiscovery() Returns discovery of WSDL. * * @return string **/ public function getDiscovery() { return "<?xml version="1.0" ?>n<discovery xmlns:disco="http://schemas.xmlsoap.org/disco/" xmlns:scl="http://schemas.xmlsoap.org/disco/scl/">n<contractref ref="http://" .></contractref>n</discovery>"; }} ?>
使用方法(服务端server.php):
<?phpdefine('WSDL_URL','hello.wsdl'); //定义WSDL文件路径ini_set('soap.wsdl_cache_enabled','0'); //关闭WSDL缓存 //WSDL文件不存在时自动创建if(!file_exists(WSDL_URL)){ require_once 'SoapDiscovery.class.php'; $disco = new SoapDiscovery('HelloWorld','IELIWB_HelloWorld'); $str = $disco->getWSDL(); file_put_contents(WSDL_URL,$str);} //SOAP开启并接收Client传入的参数响应 $server = new SoapServer(WSDL_URL);$server->setClass('HelloWorld');$server->handle(); //测试定义公开的类class HelloWorld { private $nombre = ''; public function __construct($name = 'World') {$this->name = $name;} public function greet($name = '') {$name = $name?$name:$this->name;return 'Hello '.$name.'.';} public function serverTimestamp() {return time();} }?>
客户端client.php:
<?php$client = new SoapClient("http://127.0.0.1/createsoap/hello.wsdl"); try { $result = $client->greet('ieliwb'); var_dump($result); echo "The answer isresult";}catch (SoapFault $f){ echo "Error Message: {$f->getMessage()}";}?>
1. 创建wsdl
在这里我只介绍标准的webservice。那么如何创建wsdl呢?对于PHP来说这确实是件很不容易的事情,有人说用zend studio创建很方便,这是一种方法。但对于那些不喜欢用zend studio的人来说,会觉得创建一个webservice还要安装zend studio,太强人所难了,我就是,嘿嘿。
在这里我介绍一个简单的方法,到网上下载SoapDiscovery.class.php类,里面有个公用方法:getWSDL,这个方法末尾是用的return,那么,你修改一下这个方法,我是这么做的:
//return sprintf('%s%s%s%s%s%s', $headerWSDL, $portTypeWSDL, $bindingWSDL, $serviceWSDL, $messageWSDL, '</definitions>');//生成wsdl文件,将上面的return注释$fso = fopen($this->class_name . ".wsdl" , "w");fwrite($fso, sprintf('%s%s%s%s%s%s', $headerWSDL, $portTypeWSDL, $bindingWSDL, $serviceWSDL, $messageWSDL, '</definitions>'));
现在生成wsdl的类有了,SoapDiscovery.class.php。
我只要再准备一个提供服务的类或者函数就可以创建wsdl了。比如我有个类:person,文件名为:person.class.php★,里面有两个方法,一个是say,一个是run。很简单。
<?php class person { public function say() { return("i'm speaking."); } public function run() { return("i'm running,don't disturb me please."); } }?>
到这里有两个类了:SoapDiscovery.class.php和person.class.php。
开始正式生成wsdl:创建文件server.php。将以下内容拷贝进去,运行即可生成一个person.wsdl文件
<?php include("person.class.php"); include("SoapDiscovery.class.php"); //第一个参数是类名(生成的wsdl文件就是以它来命名的),即person类,第二个参数是服务的名字(这个可以随便写)。 $disco = new SoapDiscovery('person','Person'); $disco->getWSDL();?>
2. 创建webservice服务端程序
将server.php文件的内容清空,复制以下代码进去:
<?php include("person.class.php"); $objSoapServer = new SoapServer("person.wsdl");//person.wsdl是刚创建的wsdl文件 //$objSoapServer = new SoapServer("server.php?wsdl");//这样也行 $objSoapServer->setClass("person");//注册person类的所有方法 $objSoapServer->handle();//处理请求?>
3. 创建webservice客户端程序,测试webservice是否有效,文件名是:client.php
<?php $client = new SoapClient("person.wsdl"); //$client = new SoapClient("server.php?wsdl");//这样也行 echo($client->say()); echo "<br>"; echo($client->run()); echo "<br>";?>
OK,结束。.NET如果要使用的话,你只要提供一个url给他就行了。
获得url的方法:你可以先到person.wsdl文件里面查找
,这里的url(具体url是根据你的目录确定的)就是你要提供给.NET开发人员使用的。不过别高兴太早,后面要加:“?wsdl”,http://xxxxxxxxxxxxxxxxxxxx/server.php?wsdl这样才是对的,不信你可以将url拷贝到浏览器的地址栏里看下就知道了。
.NET开发人员获得你给他的url之后,就可以在自己的项目里面添加一个服务引用或者web引用了,然后就可以根据提示完成相关操作,对于使用.NET的开发人员来说很简单的。