C#中用HttpWebRequest中发送GET/HTTP/HTTPS请求
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参考地址
using System;using System.Collections.Generic;using System.IO;using System.IO.Compression;using System.Net;using System.Net.Security;using System.Security.Cryptography.X509Certificates;using System.Text;namespace Common{ public class HttpResponse { #region Static Field private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; #endregion Static Field #region public Method /// <summary> /// Get方法获取Json数据 /// </summary> /// <param name="url"></param> /// <returns></returns> public static string GetHttpResponseJson(string url, IWebProxy webProxy) { string json = string.Empty; Encoding encoding = Encoding.UTF8; HttpWebResponse Response = CreateGetHttpResponse(new HttpGetParametersModel() { Url = url, WebProxy = webProxy }); json = GetStream(Response, encoding); return json; } /// <summary> /// Post Url获取Json数据 /// </summary> /// <param name="url"></param> /// <returns></returns> public static string PostHttpResponseJson(string url, IWebProxy webProxy) { string json = string.Empty; Encoding encoding = Encoding.UTF8; HttpWebResponse Response = CreatePostHttpResponse(new HttpPostParametersModel() { Url = url, RequestEncoding = encoding, WebProxy = webProxy }); json = GetStream(Response, encoding); return json; } /// <summary> /// Post带参数的 Url获取Json数据 /// </summary> /// <param name="url"></param> /// <param name="postDict"></param> /// <returns></returns> public static string PostHttpResponseJson(string url, IWebProxy webProxy, IDictionary<string, string> postDict) { string json = string.Empty; Encoding encoding = Encoding.UTF8; HttpWebResponse Response = CreatePostHttpResponse(new HttpPostParametersModel() { Url = url, DictParameters = postDict, WebProxy = webProxy, RequestEncoding = encoding }); json = GetStream(Response, encoding); return json; } /// <summary> /// 创建GET方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</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="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 CreateGetHttpResponse(HttpGetParametersModel getParametersModel) { if (string.IsNullOrEmpty(getParametersModel.Url)) { throw new ArgumentNullException("getParametersModel.Url"); } HttpWebRequest request = WebRequest.Create(getParametersModel.Url) as HttpWebRequest; if (getParametersModel.WebProxy != null) { request.Proxy = getParametersModel.WebProxy; } request.Method = "GET"; request.UserAgent = DefaultUserAgent; if (!string.IsNullOrEmpty(getParametersModel.UserAgent)) { request.UserAgent = getParametersModel.UserAgent; } if (getParametersModel.Timeout.HasValue) { request.Timeout = getParametersModel.Timeout.Value; } if (getParametersModel.Cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(getParametersModel.Cookies); } return request.GetResponse() as HttpWebResponse; } /// <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(HttpPostParametersModel postParametersModel) { if (string.IsNullOrEmpty(postParametersModel.Url)) { throw new ArgumentNullException("postParametersModel.Url"); } if (postParametersModel.RequestEncoding == null) { throw new ArgumentNullException("postParametersModel.RequestEncoding"); } HttpWebRequest request = null; //如果是发送HTTPS请求 if (postParametersModel.Url.StartsWith("https", StringComparison.OrdinalIgnoreCase)) { ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); request = WebRequest.Create(postParametersModel.Url) as HttpWebRequest; request.ProtocolVersion = HttpVersion.Version10; } else { request = WebRequest.Create(postParametersModel.Url) as HttpWebRequest; } if (postParametersModel.WebProxy != null) { request.Proxy = postParametersModel.WebProxy; } request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; if (!string.IsNullOrEmpty(postParametersModel.UserAgent)) { request.UserAgent = postParametersModel.UserAgent; } else { request.UserAgent = DefaultUserAgent; } if (postParametersModel.Timeout.HasValue) { request.Timeout = postParametersModel.Timeout.Value; } if (postParametersModel.Cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(postParametersModel.Cookies); } //如果需要POST数据 if (!(postParametersModel.DictParameters == null || postParametersModel.DictParameters.Count == 0)) { StringBuilder buffer = new StringBuilder(); int i = 0; foreach (string key in postParametersModel.DictParameters.Keys) { if (i > 0) { buffer.AppendFormat("&{0}={1}", key, postParametersModel.DictParameters[key]); } else { buffer.AppendFormat("{0}={1}", key, postParametersModel.DictParameters[key]); } i++; } byte[] data = postParametersModel.RequestEncoding.GetBytes(buffer.ToString()); using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } } return request.GetResponse() as HttpWebResponse; } #endregion public Method #region Private Method /// <summary> /// 设置https证书校验机制,默认返回True,验证通过 /// </summary> /// <param name="sender"></param> /// <param name="certificate"></param> /// <param name="chain"></param> /// <param name="errors"></param> /// <returns></returns> private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; //总是接受 } /// <summary> /// 将response转换成文本 /// </summary> /// <param name="response"></param> /// <param name="encoding"></param> /// <returns></returns> private static string GetStream(HttpWebResponse response, Encoding encoding) { try { if (response.StatusCode == HttpStatusCode.OK) { switch (response.ContentEncoding.ToLower()) { case "gzip": { string result = Decompress(response.GetResponseStream(), encoding); response.Close(); return result; } default: { using (StreamReader sr = new StreamReader(response.GetResponseStream(), encoding)) { string result = sr.ReadToEnd(); sr.Close(); sr.Dispose(); response.Close(); return result; } } } } else { response.Close(); } } catch (Exception e) { throw e; } return ""; } private static string Decompress(Stream stream, Encoding encoding) { byte[] buffer = new byte[100]; //int length = 0; using (GZipStream gz = new GZipStream(stream, CompressionMode.Decompress)) { //GZipStream gzip = new GZipStream(res.GetResponseStream(), CompressionMode.Decompress); using (StreamReader reader = new StreamReader(gz, encoding)) { return reader.ReadToEnd(); } /* using (MemoryStream msTemp = new MemoryStream()) { //解压时直接使用Read方法读取内容,不能调用GZipStream实例的Length等属性,否则会出错:System.NotSupportedException: 不支持此操作; while ((length = gz.Read(buffer, 0, buffer.Length)) != 0) { msTemp.Write(buffer, 0, length); } return encoding.GetString(msTemp.ToArray()); } * */ } } #endregion Private Method #region 废弃方法 /// <summary> /// 创建POST方式Json数据的HTTP请求(包括了https站点请求) /// </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> [Obsolete("该方法暂时废弃")] private HttpWebResponse CreatePostHttpResponseJson(string url, string postJson, string parameters, int? timeout, string userAgent, Encoding requestEncoding, string referer) { 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"; //服务端 判断 客户端 提交的是否是 JSON数据 时 request.ContentType = "application/json;charset=UTF-8"; request.KeepAlive = true; if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; } else { request.UserAgent = DefaultUserAgent; } if (timeout.HasValue) { request.Timeout = timeout.Value; } //如果需要POST数据 #region post parameter 类似querystring格式 if (parameters != null) { byte[] data = requestEncoding.GetBytes(parameters); using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); stream.Close(); } } #endregion post parameter 类似querystring格式 #region post json if (!string.IsNullOrEmpty(postJson)) { using (var streamWriter = new StreamWriter(request.GetRequestStream())) { //string json = "{\"user\":\"test\"," + // "\"password\":\"bla\"}"; streamWriter.Write(postJson); streamWriter.Flush(); streamWriter.Close(); } } #endregion post json if (!string.IsNullOrEmpty(referer)) { request.Referer = referer; } HttpWebResponse response = request.GetResponse() as HttpWebResponse; if (request.CookieContainer != null) { response.Cookies = request.CookieContainer.GetCookies(request.RequestUri); } return response; } #endregion 废弃方法 } #region GET/POST请求参数模型 /// <summary> /// GET请求参数模型 /// </summary> public class HttpGetParametersModel { /// <summary> /// 请求的URL(GET方式就附加参数) /// </summary> public string Url { get; set; } /// <summary> /// 超时时间 /// </summary> public int? Timeout { get; set; } /// <summary> ///浏览器代理类型 /// </summary> public string UserAgent { get; set; } /// <summary> /// Web请求代理 /// </summary> public IWebProxy WebProxy { get; set; } /// <summary> /// Cookies列表 /// </summary> public CookieCollection Cookies { get; set; } } /// <summary> /// POST请求参数模型 /// </summary> public class HttpPostParametersModel : HttpGetParametersModel { /// <summary> /// POST参数字典 /// </summary> public IDictionary<string, string> DictParameters { get; set; } /// <summary> /// 发送HTTP请求时所用的编码 /// </summary> public Encoding RequestEncoding { get; set; } } #endregion GET/POST请求参数模型}
webconf配置
<system.net> <!--使用Web代理的设置--> <!--usesystemdefault指定是否使用 Internet Explorer 代理设置。 如果设置为 true,则后面的特性将重写 Internet Explorer 代理设置。 默认值为 unspecified。--> <defaultProxy> <proxy usesystemdefault="True" proxyaddress="http://172.27.1.252:80" bypassonlocal="True" /> </defaultProxy> </system.net>
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- C#中用HttpWebRequest中发送GET/HTTP/HTTPS请求
- C#中用HttpWebRequest中发送GET/HTTP/HTTPS请求
- C#中用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求 .
- C# HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
- 在C#用HttpWebRequest中发送GET/HTTP/HTTPS请求
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