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  • 模拟HTTP协议接收请求并返回信息

    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。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/shenbing/p/6201328.html
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