HttpWebRequest提交对方网站，有的页面成功，有的不成功。几天了，一直没搞定，请高手帮忙解决，非常感谢！

vickyyu 2010-04-22 12:32:41
因项目需要，需要采用HttpWebRequest将相关内容自动提交到对方系统
下面是我的提交方式
采用这种方式大部分页面是可以正常提交的，但是有几个页面总是会出错（其实也就是跳转到了他们的一个错误页），我获取的不是正常情况下应该获取的数据，而是他们的错误页的数据。
出错的几个页面，IE6是可以正常访问的
下面是代码：

Encoding enc = System.Text.Encoding.GetEncoding("GB2312");
string sAction = "http://10.223.111.45/pms/exchange/save.so";
string sData = "readMark=null&eqType=01&appNo=101003941794&equipCateg=01&equipId=2010000001460677&assetNo=43410010000005268&chkGroup=&chkGroupName=&checkerNo=&checkerNoName=&chkDate=&chkConcCode=1&chkContent=";

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(sAction);
req.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";
req.Headers["Accept-Encoding"] = "gzip, deflate";
req.Headers["Accept-Language"] = "zh-cn";
req.Headers["Cache-Control"] = "no-cache";
req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)";
req.Referer = "http://10.223.111.45/pms/exchange/save.so";
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.CookieContainer = new CookieContainer();
req.CookieContainer.Add(this.LoginCookie);//把前面登陆后获取的COOKIE加进来

byte[] PostData = System.Text.Encoding.ASCII.GetBytes(sData);

req.ContentLength = PostData.Length;
Stream tempStream = req.GetRequestStream();
tempStream.Write(PostData, 0, PostData.Length);
tempStream.Close();

HttpWebResponse res = (HttpWebResponse)req.GetResponse();
StreamReader sr = new StreamReader(res.GetResponseStream(), enc);
string sHtml = sr.ReadToEnd();
sr.Close();
res.Close();
...全文
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特别安静 2010-04-22
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顶
vickyyu 2010-04-22
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谢谢大家，问题已经解决
因为http://10.223.111.45/pms/exchange/save.so这个页面需要使用前面某个页面产生的SESSION
在POST前走一下前面的页面就OK了，获取了SESSION就可以了
lanfengsese 2010-04-22
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upup
vickyyu 2010-04-22
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前面发的错误信息是我用程序POST后，他们服务器返回的信息
使用IE请求他们系统是正常的
vickyyu 2010-04-22
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[Quote=引用 5 楼 net_lover 的回复:]
你自己先用html表单提交看是否正常，注意是POST方式不是 GET方式进行测试。对方的页面出错，是对方的问题。
[/Quote]

通过IE使用他们的系统是正常的
showlin 2010-04-22
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java异常。。。
检查一下你post的data吧，估计有问题
孟子E章 2010-04-22
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你自己先用html表单提交看是否正常，注意是POST方式不是 GET方式进行测试。对方的页面出错，是对方的问题。
vickyyu 2010-04-22
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这是他们的异常信息

org.sotower.uep.exception.InvalidExecutionException: 错误的目标,args = org.sotower.webc.context.WebContext@4b7b72d7,,methodName = save,instance = com.cepri.pms.am.detectcalibratverif.webc.impl.DintuitiveTestFormImpl@740ea466; nested exception is java.lang.reflect.InvocationTargetException
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.sotower.uep.impl.SimpleExecutionObjectImpl.execute(SimpleExecutionObjectImpl.java:227)
at org.sotower.presentation.engine.support.AnalysisService.getReturnValue(AnalysisService.java:92)
at org.sotower.presentation.engine.WebEngine.doEngine(WebEngine.java:173)
at org.sotower.presentation.engine.WebEngine.handleRequestInternal(WebEngine.java:106)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:819)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:754)
at org.sotower.presentation.PlatformWebDispatcher.doService(PlatformWebDispatcher.java:66)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:399)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:364)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:283)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.workflow.caching.RequestCacheFilter.doFilter(RequestCacheFilter.java:31)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at com.cepri.pms.framework.monitor.RequestMonitorFilter.doFilter(RequestMonitorFilter.java:39)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.monitor.client.uri.HttpMonitorFilter.doFilter(HttpMonitorFilter.java:56)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.bsp.permit.pep.intercept.web.SecurityEnforcementFilter.doFilter(SecurityEnforcementFilter.java:105)
at org.sotower.bsp.permit.pep.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:50)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.bsp.permit.pep.ui.AbstractIntegrationFilter.doFilter(AbstractIntegrationFilter.java:215)
at org.sotower.bsp.permit.pep.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:50)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:75)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3229)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2002)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:1908)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1362)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
Caused by: com.cepri.pms.framework.exception.PMException:
at com.cepri.pms.am.detectcalibratverif.webc.impl.DintuitiveTestFormImpl.save(DintuitiveTestFormImpl.java:165)
... 44 more
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.sotower.uep.impl.SimpleExecutionObjectImpl.execute(SimpleExecutionObjectImpl.java:227)
at org.sotower.presentation.engine.support.AnalysisService.getReturnValue(AnalysisService.java:92)
at org.sotower.presentation.engine.WebEngine.doEngine(WebEngine.java:173)
at org.sotower.presentation.engine.WebEngine.handleRequestInternal(WebEngine.java:106)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:819)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:754)
at org.sotower.presentation.PlatformWebDispatcher.doService(PlatformWebDispatcher.java:66)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:399)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:364)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:283)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.workflow.caching.RequestCacheFilter.doFilter(RequestCacheFilter.java:31)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at com.cepri.pms.framework.monitor.RequestMonitorFilter.doFilter(RequestMonitorFilter.java:39)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.monitor.client.uri.HttpMonitorFilter.doFilter(HttpMonitorFilter.java:56)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.bsp.permit.pep.intercept.web.SecurityEnforcementFilter.doFilter(SecurityEnforcementFilter.java:105)
at org.sotower.bsp.permit.pep.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:50)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.bsp.permit.pep.ui.AbstractIntegrationFilter.doFilter(AbstractIntegrationFilter.java:215)
at org.sotower.bsp.permit.pep.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:50)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at org.sotower.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:75)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3229)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2002)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:1908)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1362)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
Caused by: com.cepri.pms.framework.exception.PMException:
at com.cepri.pms.am.detectcalibratverif.webc.impl.DintuitiveTestFormImpl.save(DintuitiveTestFormImpl.java:165)
... 44 more
showlin 2010-04-22
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看看返回的错误页的信息，也会有帮助的，比如有的页面要求访问间隔时间30秒以上，否则就报错
chichenzhe 2010-04-22
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你本地代码没有什么问题.IE6能访问就证明了这点.

要看对方 的 堆栈抛出的异常才好找问题.(不能转向到他们的 错误页,这样无法跟踪问题)

只有看到 异常 才能找到问题所在.
WebApi和访问WebApi两个项目
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198个经典C_WinForm实例源码(超赞)
C#常用类库(100多个)
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关于HttpWebRequest提交表单 收录以备用

本想做个提取某页一些数据的小程序.以前也看过些爬虫方面的知识.可这次这个网页的内容需要登录后才能提取.这下把我有点难住了.
问题:
1.       是否我在浏览器登录后在程序中访问就等于登录了呢?
于是经过测试, 失败告终!
猜想原因:可能COOKIE只与特定浏览器关联,由于我是在Console中通过代码访问页面,所以不能关联到浏览器的COOKIE
 
于是上网查了些关于HttpWebRequest提交表单的内容,经过很多次测试终于
C# HttpWebRequest提交数据方式

HttpWebRequest和HttpWebResponse类是用于发送和接收HTTP数据的最好选择。它们支持一系列有用的属性。这两个类位 于System.Net命名空间，默认情况下这个类对于控制台程序来说是可访问的。请注意，HttpWebRequest对象不是利用new关键字通过构 造函数来创建的，而是利用工厂机制（factory mechanism）通过Create()方法来创建的。另外，你可能预计需要显式地调用一个“Send”方法，实际上不需要。接下来调用 HttpWebRequest.G
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