使用PHP SoapClient调用WSDL List方法时返回‘looks like we got no XML document’错误

问题重现 #

• SOAP UI中调用List方法可正常请求，请求示例：

POST https://examplewsdl.com/mailwebservice/mtom/ HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: application/soap+xml;charset=UTF-8
Authorization: Basic [AUTH_TOKEN]
Content-Length: 298
Host: lms.example.com
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.5.5 (Java/16.0.1)

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:mail="http://www.examplewsdl.com/ems/mailwebservice">
soap:Header/
soap:Body
mail:ListRequest
mail:accountId123456789</mail:accountId>
</mail:ListRequest>
</soap:Body>
</soap:Envelope>

• 使用PHP SoapClient调用时返回错误looks like we got no XML document，PHP代码：

<?php
$wsdl = 'https://examplewsdl.com/mailwebservice/mtom/mailwebservice-mtom.wsdl';
$options = [
    'authentication' => SOAP_AUTHENTICATION_BASIC,
    'login' => '...',
    'password' => '...',
    'soap_version' => SOAP_1_2,
];

try {
    $client = new SoapClient($wsdl, $options);
    $res = $client->List(['accountId' => '123456789']);
} catch (SoapFault $e) {
    var_dump($e);
}

• 已尝试MTOM消息编码方案但无效

解决方法 #

1. 开启调试模式排查实际请求差异 #

在SoapClient选项中开启trace和exceptions，执行请求后打印实际发送的请求头和内容，对比SOAP UI的请求，定位差异点：

$options = [
    'authentication' => SOAP_AUTHENTICATION_BASIC,
    'login' => '...',
    'password' => '...',
    'soap_version' => SOAP_1_2,
    'trace' => 1,
    'exceptions' => 0,
];

$client = new SoapClient($wsdl, $options);
$res = $client->List(['accountId' => '123456789']);
// 打印请求头和内容
echo "Request Headers:\n" . $client->__getLastRequestHeaders() . "\n";
echo "Request Body:\n" . $client->__getLastRequest() . "\n";
echo "Response:\n" . $client->__getLastResponse() . "\n";

重点检查Content-Type是否为application/soap+xml;charset=UTF-8，请求体的XML结构、命名空间是否与SOAP UI完全一致。

2. 手动构造请求模拟SOAP UI逻辑 #

如果SoapClient自动生成的请求不符合服务要求，直接用CURL模拟SOAP UI的请求格式：

$url = 'https://examplewsdl.com/mailwebservice/mtom/';
$login = '...';
$password = '...';

// 完全复用SOAP UI的请求体
$soapBody = '<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:mail="http://www.examplewsdl.com/ems/mailwebservice">
   <soap:Header/>
   <soap:Body>
      <mail:ListRequest>
         <mail:accountId>123456789</mail:accountId>
      </mail:ListRequest>
   </soap:Body>
</soap:Envelope>';

// 初始化CURL
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $soapBody);
// 设置匹配SOAP UI的请求头
$headers = [
    'Content-Type: application/soap+xml;charset=UTF-8',
    'Authorization: Basic ' . base64_encode("$login:$password"),
    'Accept-Encoding: gzip,deflate',
];
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
// 执行请求并处理结果
$response = curl_exec($ch);
if (curl_errno($ch)) {
    echo 'CURL Error: ' . curl_error($ch);
} else {
    var_dump($response);
}
curl_close($ch);

3. 正确配置MTOM编码格式 #

如果服务强制要求MTOM编码，需构造符合MIME规范的请求内容：

$url = 'https://examplewsdl.com/mailwebservice/mtom/';
$login = '...';
$password = '...';
$soapBody = '<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:mail="http://www.examplewsdl.com/ems/mailwebservice">
   <soap:Header/>
   <soap:Body>
      <mail:ListRequest>
         <mail:accountId>123456789</mail:accountId>
      </mail:ListRequest>
   </soap:Body>
</soap:Envelope>';

// 构造MTOM格式的请求体
$boundary = 'MIMEBoundary_' . uniqid();
$mtomBody = "--$boundary\r\n";
$mtomBody .= "Content-Type: application/xop+xml;charset=UTF-8;type=\"application/soap+xml\"\r\n";
$mtomBody .= "Content-Transfer-Encoding: binary\r\n";
$mtomBody .= "Content-ID: <rootpart@soapui.org>\r\n\r\n";
$mtomBody .= $soapBody . "\r\n";
$mtomBody .= "--$boundary--\r\n";

// 初始化CURL并设置MTOM相关请求头
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $mtomBody);
$headers = [
    'Content-Type: multipart/related;boundary="' . $boundary . '";type="application/soap+xml"',
    'Authorization: Basic ' . base64_encode("$login:$password"),
    'Accept-Encoding: gzip,deflate',
];
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
// 执行请求
$response = curl_exec($ch);
if (curl_errno($ch)) {
    echo 'CURL Error: ' . curl_error($ch);
} else {
    var_dump($response);
}
curl_close($ch);

关键注意点 #

• SOAP 1.2要求Content-Type为application/soap+xml，而SOAP 1.1为text/xml，需确保请求头类型正确。
• XML命名空间、节点前缀必须与服务要求完全匹配，不能出现拼写错误。

内容的提问来源于stack exchange，提问作者Robbert