[英]webclient and expect100continue
What is the best way to set expect100continue when using WebClient(C#.NET).使用 WebClient(C#.NET) 时设置 expect100continue 的最佳方法是什么。 I have this code below, I still see 100 continue in the header. Stupid apache still complains with 505 error.我在下面有这段代码,我仍然在 header 中看到 100 继续。愚蠢的 apache 仍然抱怨 505 错误。
string url = "http://aaaa.com";
ServicePointManager.Expect100Continue = false;
WebClient service = new WebClient();
service.Credentials = new NetworkCredential("username", "password");
service.Headers.Add("Content-Type","text/xml");
service.UploadStringCompleted += (sender, e) => CompleteCallback(BuildResponse(e));
service.UploadStringAsync(new Uri(url), "POST", query);
Note: If I put the above in a console app and let it run - then I do not see the headers in fiddler.注意:如果我将上面的内容放在控制台应用程序中并让它运行 - 那么我在 fiddler 中看不到标头。 But, my code is embedded in a user library which is loaded by a WPF app.但是,我的代码嵌入在由 WPF 应用程序加载的用户库中。 So, Is there more to Expect100Continue in terms of thread, initialization, etc. Now, I think it is more of my code issue.那么,在线程、初始化等方面,Expect100Continue 是否还有更多内容。现在,我认为更多的是我的代码问题。
You need to set the Expect100Continue
property on the ServicePoint
used for the URI you're accessing: 您需要在用于访问的URI的ServicePoint
上设置Expect100Continue
属性:
var uri = new Uri("http://foo.bar.baz");
var servicePoint = ServicePointManager.FindServicePoint(uri);
servicePoint.Expect100Continue = false;
The only way to do this is to create an override. 执行此操作的唯一方法是创建覆盖。
public class ExpectContinueAware : System.Net.WebClient
{
protected override System.Net.WebRequest GetWebRequest(Uri address)
{
System.Net.WebRequest request = base.GetWebRequest(address);
if (request is System.Net.HttpWebRequest)
{
var hwr = request as System.Net.HttpWebRequest;
hwr.ServicePoint.Expect100Continue = false;
}
return request;
}
}
This works perfect. 这很完美。
Try to create the WebClient instanse after you change Expect100Continue to false. 将Expect100Continue更改为false后,尝试创建WebClient实例。 Or use a Webrequest
instead of a WebClient
或者使用Webrequest
而不是WebClient
One of my below approach also worked, 我的下面一种方法也奏效了,
In my constructor of class (service calling), you can set System.Net.ServicePointManager.Expect100Continue = false;
在我的类(服务调用)的构造函数中,您可以设置System.Net.ServicePointManager.Expect100Continue = false;
and then I have created BasicHttpBinding object and continued, it executed successfully. 然后我创建了BasicHttpBinding对象并继续,它执行成功。
You can modify your Web/App.Config, by adding:您可以通过添加以下内容来修改您的 Web/App.Config:
<system.net>
<settings>
<servicePointManager expect100Continue="false"/>
</settings>
</system.net>
At least for me, if the faulty server gets patched, I can easily remove the setting without having to recompile.至少对我来说,如果故障服务器得到修补,我可以轻松删除设置而无需重新编译。
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