我需要从我的应用程序中创建一个经过身份验证的 httpwebrequest。对我的请求的响应应该是 json 格式。为此，我使用以下代码:
// Create the web request
Uri address = new Uri("http://www.mysite.com/remote/user/login/format/json");
HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;
request.Method = "POST";
request.UseDefaultCredentials = false;
request.Credentials = new NetworkCredential(UserName, Password);
request.PreAuthenticate = true;
request.ContentType = "application/x-www-form-urlencoded";
request.Accept = "application/json";
string data = string.Format("username={0}&password={1}", otherusername, otherpassword);
// Create a byte array of the data we want to send
byte[] byteData = UTF8Encoding.UTF8.GetBytes(data);
// Set the content length in the request headers
request.ContentLength = byteData.Length;
//Write data
using (Stream postStream = request.GetRequestStream())
{
postStream.Write(byteData, 0, byteData.Length);
}
// Get response
try
{
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
// Get the response stream
StreamReader reader = new StreamReader(response.GetResponseStream());
// Console application output
jsonResponse = reader.ReadToEnd();
reader.Close();
}
user = new User();
JObject o = JObject.Parse(jsonResponse);
user.Unguessable_id = (string)o["unguessable_id"];
user.Print_id = (string)o["print_id"];
user.Rrid = (string)o["rrid"];
user.Raid = (string)o["raid"];
}
catch (WebException ex) {
errorMessage = ex.Message;
}
问题是第一次调用它总是在服务器上给出 500 错误。并且请求失败。如果我重做调用(通过在我的浏览器中进行刷新)请求成功。
请求在正常情况下应该是这样的:
POST /remote/user/login/format/json HTTP/1.1
Host: <yourhost>
username=user&password=pass
但是当服务器发出 500 错误时，他收到了这样的消息:
username=user&password=passwordPOST /remote/user/login/format/json HTTP/1.1
知道为什么会这样吗？在我的测试应用程序中，如果我刷新使 httpwebrequest 调用成功的页面。
编辑: 安装 Fiddler 后，发出的请求如下所示:
=> 产生 500 的那个
POST http://www.mysite.com/remote/user/login/format/json HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Accept: application/json
Host: www.mysite.com
Content-Length: 30
Expect: 100-continue
Connection: Keep-Alive
username=user&password=pass
=> 刷新时生成的
POST http://www.mysite.com/remote/user/login/format/json HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Accept: application/json
Authorization: Basic ZGNpOkFpR2g3YWVj
Host: www.mysite.com
Content-Length: 30
Expect: 100-continue
Connection: Keep-Alive
username=user&password=pass
似乎 Authorization: Basic ZGNpOkFpR2g3YWVj 没有包含在第一个请求中......为什么会这样？(我对两个请求使用相同的代码)
请您参考如下方法:
我建议您安装 Fiddler看看到底发生了什么
