使用SOAP Web服务时出现"未找到Action标头"错误消息

Question

在iOS App中使用SOAP Web服务时出现以下错误

"No Action header was found with namespace 'http://www.w3.org/2005/08/addressing' for the given message."

同样的Web服务在SOAP UI工具中运行良好.

以下是请求格式

NSString *data = @"<soap:Envelope xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:tem=\"http://tempuri.org/\">
<soap:Header></soap:Header>
<soap:Body><tem:GetEvaluators></tem:GetEvaluators></soap:Body>
</soap:Envelope>";

NSString *url = @"webservice url";
NSData *postData = [data dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:url]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:postData];
[request setTimeoutInterval:20.0];
[request setValue:@"application/soap+xml;charset=UTF-8" forHTTPHeaderField:@"Content-Type"];
[request setValue:@"http://tempuri.org/IATCService/GetEvaluators" forHTTPHeaderField:@"SOAPAction"];
 NSData *urlData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

从webservice收到完整的错误响应

<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
<s:Header>
    <a:Action s:mustUnderstand="1">http://www.w3.org/2005/08/addressing/fault</a:Action>
</s:Header>
<s:Body>
    <s:Fault>
        <s:Code>
            <s:Value>s:Sender</s:Value>
            <s:Subcode>
                <s:Value>a:MessageAddressingHeaderRequired</s:Value>
            </s:Subcode>
        </s:Code>
        <s:Reason>
            <s:Text xml:lang="en-US">No Action header was found with namespace 'http://www.w3.org/2005/08/addressing' for the given message.</s:Text>
        </s:Reason>
        <s:Detail>
            <a:ProblemHeaderQName>a:Action</a:ProblemHeaderQName>
        </s:Detail>
    </s:Fault>
</s:Body>

任何帮助真的很感激.

Answer 1

我们在基于ASP.NET的服务器上遇到了同样的问题(使用python/suds时出现错误信息,同样的查询在SoapUi中工作); 经过大量挖掘,我们发现需要添加一个包含动作的SOAP头(作为XML元素); 在Content-Type或SOAPAction标头中执行操作是不够的(但也不会受到伤害).以下是成功查询的示例(来自SoapUi):

<SOAP-ENV:Envelope xmlns:ns0="..." xmlns:ns1="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope">
   <SOAP-ENV:Header xmlns:wsa="http://www.w3.org/2005/08/addressing"><wsa:Action>http://www.foo.com/.../SomeJob/getParameters</wsa:Action></SOAP-ENV:Header>
   <ns1:Body>
      <ns0:getParameters>...</ns0:getParameters>
   </ns1:Body>
</SOAP-ENV:Envelope>

使用Python和SUDS,我们就是这样做的:

from suds.sax.element import Element
wsans = ('wsa', "http://www.w3.org/2005/08/addressing")
client.set_options(soapheaders = Element('Action', ns=wsans).setText(action))

可以从方法中查询操作,即如果要调用方法client.service.foo,请使用

action = client.service.foo.method.soap.action

我们通过查看SoapUi HTTP日志找到了这个.(我们也尝试过Wireshark,但这不起作用,因为我们正在尝试使用我们不拥有的https服务器.)