这个话题似乎是一个拥有一百万个“解决方案”的主题,结果更加复杂。所以请放慢我的脚步,因为我将尝试展示发生了什么,我正在使用什么以及我如何尝试解决这个问题。
我的测试环境正在运行 IIS6 asp.net 2.0,我已经设置好了
'Access-Control-Allow-Origin' *
我还将 .asmx 扩展的动词设置为
"GET,HEAD,POST,DEBUG,OPTIONS"
通过 jQuery v1.7.2 ajax() 调用,我能够从服务器获取 xml 文件,并 POST 到返回具有跨域预期结果的字符串的基本服务。所以我知道至少部分我的跨域请求正在工作。
当我开始对此进行扩展并使用 json 将数据发布到服务时,我的问题就出现了
我有一个简单的 asmx webservice 方法:
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public SubResponse HelloWorldX(SubRequestXX SubReq)
{
SubResponse sr = new SubResponse();
sr.resultCode = "777";
sr.resultMsg = "hello - " + SubReq.EmailAddress;
return sr;
}
非常简单,那里并没有发生什么神奇的事情,我要做的就是传入“SubRequestXX”对象,现在只需验证它到达那里并做出响应。
Using jQuery:
$.ajax({
type: "POST",
url: "http://somedomain/subscription/MyService.asmx/HelloWorldX",
processData: false,
data: '{ "SubReq" : {"EmailAddress":"user@test.com"} }',
dataType: "json",
contentType: "application/json; charset=utf-8",
cache: false,
success: function(data, textStatus, jqXHR) {
ajaxSucccess3(data, textStatus, jqXHR);
},
error: function(jqXHR, textStatus, errorThrown) {
console.log("Retrieve Hello Failed (AJAX Error): " + jqXHR.statusText + " | " + textStatus + " | " + errorThrown);
}
});
}
也许答案就在那里?但这是 fiddler 的 RAW 数据显示我使用来自同一域上的页面的完全相同的 JS 代码(成功 - 结果代码 200):
REQUEST:
POST http://somedomain/subscription/Service.asmx/HelloWorldX HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: application/json; charset=utf-8
X-Requested-With: XMLHttpRequest
Referer: http://somedomain/subscription/subscription_-cors.html
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; 9LA)
Host: somedomain
Content-Length: 45
Connection: Keep-Alive
Pragma: no-cache
{ "SubReq" : {"EmailAddress":"user@test.ca"} }
RESPONSE:
HTTP/1.1 200 OK
Date: Fri, 28 Sep 2012 16:59:15 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Access-Control-Allow-Origin: *
X-AspNet-Version: 2.0.50727
Cache-Control: private, max-age=0
Content-Type: application/json; charset=utf-8
Content-Length: 147
{"d":{"__type":"SubService.DataObj.SubResponse","resultCode":"777","resultMsg":"hello - rob@test.ca"}}
所以一切看起来都很好,并且表现如预期。现在,如果我采用相同的 html/js 代码,在另一台服务器上部署并发出相同的请求(跨站点)提琴手显示(失败结果代码 500):
REQUEST:
POST http://somedomain/subscription/Service.asmx/HelloWorldX HTTP/1.1
Accept: */*
Origin: http://www.crossdomainsite.com
Accept-Language: en-US
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; 9LA)
Host: somedomain
Content-Length: 0
Connection: Keep-Alive
Pragma: no-cache
RESPONSE:
HTTP/1.1 500 Internal Server Error
Date: Fri, 28 Sep 2012 16:58:56 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Access-Control-Allow-Origin: *
X-AspNet-Version: 2.0.50727
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Length: 4732
.....
Request format is unrecognized for URL unexpectedly ending in '/HelloWorldX'
.....
[InvalidOperationException: Request format is unrecognized for URL unexpectedly ending in '/HelloWorldX'.]
System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response) +405961
System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext context, String verb, String url, String filePath) +212
System.Web.Script.Services.ScriptHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated) +47
System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) +193
System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +93
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
许多搜索结果显示了一些 web.config 更改。如果我将以下内容添加到我的 system.web 部分:
<webServices>
<protocols>
<add name="HttpGet"/>
<add name="HttpPost"/>
</protocols>
</webServices>
然后我的请求看起来像
POST http://somedomain/subscription/Service.asmx/HelloWorldX HTTP/1.1
Accept: */*
Origin: http://www.crossdomainsite.ca
Accept-Language: en-US
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; 9LA)
Host: somedomain
Content-Length: 0
Connection: Keep-Alive
Pragma: no-cache
我的回应:
HTTP/1.1 500 Internal Server Error
Date: Fri, 28 Sep 2012 17:37:00 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Access-Control-Allow-Origin: *
X-AspNet-Version: 2.0.50727
Cache-Control: private
Content-Type: text/plain; charset=utf-8
Content-Length: 461
System.InvalidOperationException: HelloWorldX Web Service method name is not valid.
at System.Web.Services.Protocols.HttpServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocol.SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response)
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)
因此,将该部分添加到我的 web.config 中做了一些事情,因为我的结果略有不同。但我无法辨别是什么。
其他解决方案建议使用这些 web 配置设置,因为我使用的是 asp.net 2.0,请注意,我已将这些设置保留在上述所有结果中,注释掉的是来自项目创建的原件:
<httpHandlers>
<remove verb="*" path="*.asmx"/>
<!--<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>-->
<add path="*.asmx" verb="*" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
<!--<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>-->
<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<!--<add verb="GET,HEAD" path="ScriptResource.axd" validate="false" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>-->
<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
</httpHandlers>
所以......最大的问题......为什么我的跨站点请求使用相同的代码失败,尽管上述所有内容?似乎只要请求来自另一个域,它就会阻塞 JSON。
任何帮助将不胜感激解决这个谜。我假设它要么是 IIS6(服务器)设置,要么是我的 $.ajax() 调用,我觉得它可能很简单或很小,但我似乎无法理解它。