在 PHP 中处理 Web 服务错误 [英] Handling web service errors within PHP
问题描述
我有一些简单的 SOAP 客户端来从 WSDL 获取数据并显示它.
I have some simple SOAP client to get data from WSDL and display it.
<?php
//Data, connection, auth
$dataFromTheForm = $_POST['fieldName']; // request data from the form
$soapUrl = "https://connecting.website.com/soap.asmx?op=DoSomething"; // asmx URL of WSDL
$soapUser = "username"; // username
$soapPassword = "password; // password
// xml post structure
$xml_post_string = '<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<GetItemPrice xmlns="http://connecting.website.com/WSDL_Service"> // xmlns value to be set to your's WSDL URL
<PRICE>'.$dataFromTheForm.'</PRICE> // data from the form, e.g. some ID number
</GetItemPrice >
</soap:Body>
</soap:Envelope>';
$headers = array(
"Content-type: text/xml;charset=\"utf-8\"",
"Accept: text/xml",
"Cache-Control: no-cache",
"Pragma: no-cache",
"SOAPAction: http://connecting.website.com/WSDL_Service/GetPrice", // your op URL
"Content-length: ".strlen($xml_post_string),
);
$url = $soapUrl;
// PHP cURL for https connection with auth
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERPWD, $soapUser.":".$soapPassword); // username and password - declared at the top of the doc
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $soapUrl); // asmx URL of WSDL - declared at the top of the doc
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
// converting
$response = curl_exec($ch);
curl_close($ch);
// converting
$response1 = str_replace("<soap:Body>","",$response);
$response2 = str_replace("</soap:Body>","",$response1);
// convertingc to XML
$parser = simplexml_load_string($response2);
?>
一切正常 - 当 WSDL 正常工作时.
Everything works fine - when WSDL works fine.
但是,当 WSDL 失败(服务器上的运行时错误)时,我的站点会在第 152 行抛出数百个警告,即:
But, when WSDL fails( Runtime Error on the server) my site is throwing hundreds of warnings all at line 152 which is:
$parser = simplexml_load_string($response2);
如何检测 WSDL 返回了无效的 XML(html 错误消息)并在此基础上显示简单的错误消息?
推荐答案
查看 文档页面.
提示使用 libxml_use_internal_errors() 抑制所有 XML 错误,然后使用 libxml_get_errors() 迭代它们.
Tip Use libxml_use_internal_errors() to suppress all XML errors, and libxml_get_errors() to iterate over them afterwards.
更新:
对于这种情况,示例如下所示:
For this case example would look like that:
libxml_use_internal_errors(true); //enable error handling
$parser = simplexml_load_string($output2);
if(!$parser){ // if $parser is not valid XML response
echo '<p>Sorry. This service is currently unavailable. Please try again later.</p>';
} else {
//if $parser is valid XML response, do something
}
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