利用HttpClient进行Http请求，基于此，简单地封装了下：
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using System; using System.Collections.Generic; using System.Collections.Specialized; using System.IO; using System.Linq; using System.Net; using System.Net.Http; using System.Text; namespace ConsoleApplication2 { public class HTTPClientHelper { private static readonly HttpClient HttpClient; static HTTPClientHelper() { var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.None }; HttpClient = new HttpClient(handler); } /// <summary> /// get请求，可以对请求头进行多项设置 /// </summary> /// <param name="paramArray"></param> /// <param name="url"></param> /// <returns></returns> public static string GetResponseByGet(List<KeyValuePair<string,string>> paramArray, string url) { string result = ""; var httpclient = HTTPClientHelper.HttpClient; url = url + "?" + BuildParam(paramArray); var response = httpclient.GetAsync(url).Result; if (response.IsSuccessStatusCode) { Stream myResponseStream = response.Content.ReadAsStreamAsync().Result; StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8")); result = myStreamReader.ReadToEnd(); myStreamReader.Close(); myResponseStream.Close(); } return result; } public static string GetResponseBySimpleGet(List<KeyValuePair<string,string>> paramArray, string url) { var httpclient = HTTPClientHelper.HttpClient; url = url + "?" + BuildParam(paramArray); var result = httpclient.GetStringAsync(url).Result; return result; } public static string HttpPostRequestAsync(string Url, List<KeyValuePair<string, string>> paramArray, string ContentType = "application/x-www-form-urlencoded") { string result = ""; var postData = BuildParam(paramArray); var data = Encoding.ASCII.GetBytes(postData); try { using (HttpClient http = new HttpClient()) { http.DefaultRequestHeaders.Add("User-Agent", @"Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)"); http.DefaultRequestHeaders.Add("Accept", @"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8"); HttpResponseMessage message = null; using (Stream dataStream = new MemoryStream(data ?? new byte[0])) { using (HttpContent content = new StreamContent(dataStream)) { content.Headers.Add("Content-Type", ContentType); var task = http.PostAsync(Url, content); message = task.Result; } } if (message != null && message.StatusCode == System.Net.HttpStatusCode.OK) { using (message) { result = message.Content.ReadAsStringAsync().Result; } } } } catch (Exception ex) { Console.WriteLine(ex.Message); } return result; } private static string Encode(string content, Encoding encode = null) { if (encode == null) return content; return System.Web.HttpUtility.UrlEncode(content, Encoding.UTF8); } private static string BuildParam(List<KeyValuePair<string, string>> paramArray, Encoding encode = null) { string url = ""; if (encode == null) encode = Encoding.UTF8; if (paramArray != null && paramArray.Count > 0) { var parms = ""; foreach (var item in paramArray) { parms += string.Format("{0}={1}&", Encode(item.Key, encode), Encode(item.Value, encode)); } if (parms != "") { parms = parms.TrimEnd('&'); } url += parms; } return url; } } } |
有关更多的Http请求，请看这里：https://github.com/wangqiang3311/HttpRequestDemo