问题:request.Headers;结果:HttpWebRequest.Headers 属性
指定构成 HTTP 标头的名称/值对的集合。
Headers 集合包含与请求关联的协议标头。下表列出了由系统或由属性或方法设置但未存储在 Headers 中的 HTTP 标头。
标头 |
设置方 |
---|---|
Accept |
由 Accept 属性设置。 |
Connection |
由 Connection 属性和 KeepAlive 属性设置。 |
Content-Length |
由 ContentLength 属性设置。 |
Content-Type |
由 ContentType 属性设置。 |
Expect |
由 Expect 属性设置。 |
Date |
由系统设置为当前日期。 |
Host |
由系统设置为当前主机信息。 |
If-Modified-Since |
由 IfModifiedSince 属性设置。 |
Range |
由 AddRange 方法设置。 |
Referer |
由 Referer 属性设置。 |
Transfer-Encoding |
由 TransferEncoding 属性设置(SendChunked 属性必须为 true)。 |
User-Agent |
由 UserAgent 属性设置。 |
如果您试图设置这些受保护的标头之一,则 Add 方法将引发 ArgumentException。
在通过调用 GetRequestStream、BeginGetRequestStream、GetResponse 或 BeginGetResponse 方法启动请求之后,更改 Headers 属性将引发 InvalidOperationException。
不应该假设标头值会保持不变,因为 Web 服务器和缓存可能会更改标头或向 Web 请求添加标头。
- // Create a new 'HttpWebRequest' Object to the mentioned URL.
- HttpWebRequest myHttpWebRequest=(HttpWebRequest)WebRequest.Create("http://www.contoso.com");
- // Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
- HttpWebResponse myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse();
- Console.WriteLine("/nThe HttpHeaders are /n/n/tName/t/tValue/n{0}",myHttpWebRequest.Headers);
- // Print the HTML contents of the page to the console.
- Stream streamResponse=myHttpWebResponse.GetResponseStream();
- StreamReader streamRead = new StreamReader( streamResponse );
- Char[] readBuff = new Char[256];
- int count = streamRead.Read( readBuff, 0, 256 );
- Console.WriteLine("/nThe HTML contents of page the are : /n/n ");
- while (count > 0)
- {
- String outputData = new String(readBuff, 0, count);
- Console.Write(outputData);
- count = streamRead.Read(readBuff, 0, 256);
- }
- // Close the Stream object.
- streamResponse.Close();
- streamRead.Close();
- // Release the HttpWebResponse Resource.
- myHttpWebResponse.Close();
版权声明:本文为博主原创文章,未经博主允许不得转载。
场景是 winform程序通过HttpWebRequest 调用web Api 接口
其中参数没传过去,有做过这东西的,给点建议。
下面贴代码;
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/// <summary> /// 创建POST方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="parameters">随同请求POST的参数名称及参数值字典</param> /// <param name="timeout">请求的超时时间</param> /// <param name="userAgent">请求的客户端浏览器信息,可以为空</param> /// <param name="requestEncoding">发送HTTP请求时所用的编码</param> /// <param name="cookies">随同HTTP请求发送的Cookie信息,如果不需要身份验证可以为空</param> /// <returns></returns> public static HttpWebResponse CreatePostHttpResponse( string url, IDictionary< string , string > parameters, int ? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies) { if ( string .IsNullOrEmpty(url)) { throw new ArgumentNullException( "url" ); } if (requestEncoding == null ) { throw new ArgumentNullException( "requestEncoding" ); } HttpWebRequest request = null ; //如果是发送HTTPS请求 if (url.StartsWith( "https" , StringComparison.OrdinalIgnoreCase)) { ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); request = WebRequest.Create(url) as HttpWebRequest; request.ProtocolVersion = HttpVersion.Version10; } else { request = WebRequest.Create(url) as HttpWebRequest; } request.Method = "POST" ; request.Headers.Add( "X_REG_CODE" , "288a633ccc1" ); request.Headers.Add( "X_MACHINE_ID" , "a306b7c51254cfc5e22c7ac0702cdf87" ); request.Headers.Add( "X_REG_SECRET" , "de308301cf381bd4a37a184854035475d4c64946" ); request.Headers.Add( "X_STORE" , "0001" ); request.Headers.Add( "X_BAY" , "0001-01" ); request.Headers.Add( "X-Requested-With" , "XMLHttpRequest" ); request.ContentType = "application/x-www-form-urlencoded" ; request.Headers.Add( "Accept-Language" , "zh-CN" ); request.Headers.Add( "Accept-Encoding" , "gzip, deflate" ); request.Accept = "*/*" ; if (! string .IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; } else { request.UserAgent = DefaultUserAgent; } if (timeout.HasValue) { request.Timeout = timeout.Value; } // if (cookies != null) // { request.CookieContainer = new CookieContainer(); // request.CookieContainer.Add(cookies); // } //如果需要POST数据 if (!(parameters == null || parameters.Count == 0)) { StringBuilder buffer = new StringBuilder(); int i = 0; foreach ( string key in parameters.Keys) { if (i > 0) { buffer.AppendFormat( "&{0}={1}" , key, parameters[key]); } else { buffer.AppendFormat( "{0}={1}" , key, parameters[key]); } i++; } byte [] data = requestEncoding.GetBytes(buffer.ToString()); using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } } HttpWebResponse res; try { res = (HttpWebResponse)request.GetResponse(); } catch (WebException ex) { res = (HttpWebResponse)ex.Response; } return res; } |
下面是调用代码
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public string GetCookies() { string url = "http://localhost:17766/Account/LogOn" ; IDictionary< string , string > parameters = new Dictionary< string , string >(); parameters.Add( "StoreCode" , "0001" ); parameters.Add( "UserName" , "T00000" ); parameters.Add( "Password" , "123456" ); //string postData = "StoreCode=0001&UserName=T00000&Password=123456"; //HttpWebResponseUtility.PostData(postData, url, null); Encoding encoding = Encoding.GetEncoding( "gb2312" ); HttpWebResponse response = HttpWebResponseUtility.CreatePostHttpResponse(url, parameters, null , null , encoding, null ); String xml = new StreamReader(response.GetResponseStream(), Encoding.UTF8).ReadToEnd(); return xml; } |