第一次用markdown寫博客，體驗下

因為常用Http的幾種請求方式，總結一下。

1.封裝兩個Http的最常用方法，叫做HttpHelper類。

HttpPost:

public static string HttpPost(string Url, string postDataStr){HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);request.Method = "POST";request.ContentType = "application/x-www-form-urlencoded";request.ContentLength = postDataStr.Length;StreamWriter writer = new StreamWriter(request.GetRequestStream(), Encoding.ASCII);writer.Write(postDataStr);writer.Flush();HttpWebResponse response = (HttpWebResponse)request.GetResponse();string encoding = response.ContentEncoding;if (encoding == null || encoding.Length < 1){encoding = "UTF-8"; //默認編碼 }StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));string retString = reader.ReadToEnd();return retString;}

HttpGet:

public static string HttpGet(string Url){HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);request.Method = "GET";request.ContentType = "text/html;charset=UTF-8";HttpWebResponse response = (HttpWebResponse)request.GetResponse();Stream myResponseStream = response.GetResponseStream();StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);string retString = myStreamReader.ReadToEnd();myStreamReader.Close();myResponseStream.Close();return retString;}

WebClientde中Post和Get:

//Postusing (var client = new WebClient()){client.Headers[HttpRequestHeader.ContentType] = "application/json";client.Encoding = Encoding.UTF8;result = client.UploadString(postUrl, "POST", postData);}//Get var wc = new WebClient();var jsonResult = wc.DownloadString(Url);

封裝好Http的方法，直接傳入Url和postData即可，不必每次創建request對象。

更新：the remote server returned an error (401) unauthorized

var req = (HttpWebRequest)WebRequest.Create(tgtUrl);req.UseDefaultCredentials = true;req.PreAuthenticate = true;req.Credentials = CredentialCache.DefaultCredentials;var response = req.GetResponse();var stream = req.GetRequestStream();var wc = new WebClient();//Set default credential, avoid unauthorize errorwc.Credentials = CredentialCache.DefaultCredentials;wc.UseDefaultCredentials = true;

轉載于:https://www.cnblogs.com/shy-huang/p/7345285.html

總結

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