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  • C#模拟http 发送post或get请求

    private string HttpPost(string Url, string postDataStr)

            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);
                request.CookieContainer = cookie;
                Stream myRequestStream = request.GetRequestStream();
                StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
                myStreamWriter.Write(postDataStr);
                myStreamWriter.Close();
     
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
     
                response.Cookies = cookie.GetCookies(response.ResponseUri);
                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
                string retString = myStreamReader.ReadToEnd();
                myStreamReader.Close();
                myResponseStream.Close();
     
                return retString;
            }
     
            public string HttpGet(string Url, string postDataStr)
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" "" "?") + postDataStr);
                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.GetEncoding("utf-8"));
                string retString = myStreamReader.ReadToEnd();
                myStreamReader.Close();
                myResponseStream.Close();
     
                return retString;
            }
     

    在post的时候有时也用的到cookie,像登录163发邮件时候就需要发送cookie,所以在外部一个cookie属性随时保存 CookieContainer cookie = new CookieContainer();

    !注意:有时候请求会重定向,但我们就需要从重定向url获取东西,像QQ登录成功后获取sid,但上面的会自动根据重定向地址跳转。我们可以用:
    request.AllowAutoRedirect = false;设置重定向禁用,你就可以从headers的Location属性中获取重定向地址

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  • 原文地址:https://www.cnblogs.com/zhao-y/p/9516184.html
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