C# - Webclient 发布数据问题

标签 c# post webclient

我尝试使用 webclient 从网站提取数据，但我不知道 Post 的确切参数，而且我总是收到空数据。

Website: Red Arrow is the action and on green its the data i want

要查看 Post 参数，我使用 Google Ghrome 开发人员工具，并在“网络”选项卡中查找 Post 请求 header 。

Post Request - Header

我的 C# 代码是这样的:

旧代码 - 这不适用于网络客户端

string URI = "https://www.citius.mj.pt/Portal/consultas/ConsultaVendaAnuncios.aspx";

using (WebClient wc = new WebClient())
{
    wc.Headers.Add(HttpRequestHeader.Accept, "*/*");
    wc.Headers.Add(HttpRequestHeader.AcceptLanguage, "pt-PT,pt;q=0.8,en-US;q=0.6,en;q=0.4,es;q=0.2");
    wc.Headers.Add(HttpRequestHeader.CacheControl, "no-cache");
    //wc.Headers.Add(HttpRequestHeader.Connection, "keep-alive");
    //wc.Headers.Add(HttpRequestHeader.ContentLength, "18801");
    wc.Headers.Add(HttpRequestHeader.ContentType, "application/x-www-form-urlencoded; charset=UTF-8");
    wc.Headers.Add(HttpRequestHeader.Cookie, "_pk_id.70.0919=b6cdc4d1ee3456d0.1456252054.2.1456255268.1456255085.;" + "ASP.NET_SessionId=zlth2slu3o05ek511w5jb4rt");
    wc.Headers.Add(HttpRequestHeader.Host, "www.citius.mj.pt");
    wc.Headers.Add("Origin", "https://www.citius.mj.pt");
    wc.Headers.Add(HttpRequestHeader.Referer, "https://www.citius.mj.pt/Portal/consultas/ConsultaVendaAnuncios.aspx");
    wc.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36");
    wc.Headers.Add("X-MicrosoftAjax", "Delta=true");
    wc.Headers.Add("X-Requested-With", "XMLHttpRequest");

    string parametro1 = "ctl00$ContentPlaceHolder1$ScriptManager1=ctl00$ContentPlaceHolder1$ScriptManager1|ctl00$ContentPlaceHolder1$btnSearch";
    string parametro2 = "ctl00$ContentPlaceHolder1$rbtlTribunais=False";
    string parametro3 = "ctl00$ContentPlaceHolder1$ddlTribunais=- Todos os Tribunais -";
    string parametro4 = "ctl00$ContentPlaceHolder1$rblDias=todos";
    string parametro5 = "__EVENTTARGET=";
    string parametro6 = "__EVENTARGUMENT=";
    string parametro7 = "__LASTFOCUS=";
    string parametro8 = "__VIEWSTATE=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";
    string parametro9 = "__EVENTVALIDATION=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";
    string parametro10 = "__ASYNCPOST=true";
    string parametro11 = "ctl00$ContentPlaceHolder1$btnSearch=Pesquisar";

    string parametros = parametro1 + "&" + parametro2 + "&" + parametro3 + "&" + parametro4 + "&" + parametro5 + "&" + parametro6 + "&" + parametro7 + "&" + parametro8 + "&" + parametro9 + "&" + parametro10 + "&" + parametro11;

    string HtmlResult = wc.UploadString(URI, parametros);
}

我做错了什么？

SAKURA 的工作代码 + MYCODE 跳转到下一页

string URI = "https://www.citius.mj.pt/Portal/consultas/ConsultaVendaAnuncios.aspx";

CookieContainer cc = new CookieContainer();
HttpWebRequest h = (HttpWebRequest)WebRequest.Create(URI);
h.CookieContainer = cc;
HttpWebResponse hr = (HttpWebResponse)h.GetResponse();
using (var s = hr.GetResponseStream())
{
    using (var r = new StreamReader(s, Encoding.UTF8))
    {
        string html = r.ReadToEnd();                        

        Match mVS = Regex.Match(html, "id=\"__VIEWSTATE\" value=\"(.*?)\"", RegexOptions.Singleline);                        
        Match mEV = Regex.Match(html, "id=\"__EVENTVALIDATION\" value=\"(.*?)\"", RegexOptions.Singleline);

        Dictionary<string, string> param = new Dictionary<string, string>();
        param.Add("ctl00$ContentPlaceHolder1$ScriptManager1", "ctl00$ContentPlaceHolder1$ScriptManager1|ctl00$ContentPlaceHolder1$btnSearch");
        //param.Add("ctl00$ContentPlaceHolder1$ScriptManager1", "ctl00$ContentPlaceHolder1$upResultados|ctl00$ContentPlaceHolder1$Pager1$btnNextPage");                        
        param.Add("__EVENTTARGET", "");
        param.Add("__EVENTARGUMENT", "");
        param.Add("__LASTFOCUS", "");
        param.Add("__VIEWSTATE", mVS.Groups[1].Value);
        param.Add("__EVENTVALIDATION", mEV.Groups[1].Value);
        param.Add("ctl00$ContentPlaceHolder1$rbtlTribunais", "False");
        param.Add("ctl00$ContentPlaceHolder1$ddlTribunais", "- Todos os Tribunais -");
        param.Add("ctl00$ContentPlaceHolder1$rblDias", "todos");
        param.Add("__ASYNCPOST", "true");
        param.Add("ctl00$ContentPlaceHolder1$btnSearch", "Pesquisar");

        string post = "";
        foreach (var i in param)
        {
            post += WebUtility.UrlEncode(i.Key) + "=" + WebUtility.UrlEncode(i.Value) + "&";
        }

        var data = Encoding.UTF8.GetBytes(post);                        

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URI);
        request.CookieContainer = cc;
        request.Referer = URI;
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
        request.UserAgent = "Mozilla/5.0 (Windows NT 6.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36";
        request.Headers.Add("Origin", "https://www.citius.mj.pt");
        request.Headers.Add("X-Requested-With", "XMLHttpRequest");
        request.Headers.Add("X-MicrosoftAjax: Delta=true");
        request.ContentLength = data.Length;

        using (var stream = request.GetRequestStream())
        {
            stream.Write(data, 0, data.Length);
        }

        HttpWebResponse response = (HttpWebResponse)request.GetResponse();                        

        var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();                        

        int x = 1;

        ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

        Dictionary<string, string> param2 = new Dictionary<string, string>();
        //param.Add("ctl00$ContentPlaceHolder1$ScriptManager1", "ctl00$ContentPlaceHolder1$ScriptManager1|ctl00$ContentPlaceHolder1$btnSearch");
        param2.Add("ctl00$ContentPlaceHolder1$ScriptManager1", "ctl00$ContentPlaceHolder1$upResultados|ctl00$ContentPlaceHolder1$Pager1$btnNextPage");
        param2.Add("__EVENTTARGET", "");
        param2.Add("__EVENTARGUMENT", "");
        param2.Add("__LASTFOCUS", "");
        param2.Add("__VIEWSTATE", mVS.Groups[1].Value);
        param2.Add("__EVENTVALIDATION", mEV.Groups[1].Value);
        param2.Add("ctl00$ContentPlaceHolder1$rbtlTribunais", "False");
        param2.Add("ctl00$ContentPlaceHolder1$ddlTribunais", "- Todos os Tribunais -");
        param2.Add("ctl00$ContentPlaceHolder1$rblDias", "todos");
        param2.Add("__ASYNCPOST", "true");                        
        //param2.Add("ctl00$ContentPlaceHolder1$btnSearch", "Pesquisar");

        string post2 = "";
        foreach (var i in param2)
        {
            post2 += WebUtility.UrlEncode(i.Key) + "=" + WebUtility.UrlEncode(i.Value) + "&";
        }

        var data2 = Encoding.UTF8.GetBytes(post2);    

        HttpWebRequest request2 = (HttpWebRequest)WebRequest.Create(URI);
        request2.CookieContainer = cc;
        request2.Referer = URI;
        request2.Method = "POST";
        request2.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
        request2.UserAgent = "Mozilla/5.0 (Windows NT 6.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36";
        request2.Headers.Add("Origin", "https://www.citius.mj.pt");
        request2.Headers.Add("X-Requested-With", "XMLHttpRequest");
        request2.Headers.Add("X-MicrosoftAjax: Delta=true");
        request2.ContentLength = data2.Length;

        using (var stream2 = request2.GetRequestStream())
        {
            stream2.Write(data2, 0, data2.Length);
        }

        HttpWebResponse response2 = (HttpWebResponse)request2.GetResponse();

        var responseString2 = new StreamReader(response2.GetResponseStream()).ReadToEnd();  

        int y = 2;
    }
}

最佳答案

问题是您在发送回服务器时没有对 POST 数据进行编码。您可以使用 WebUtility.UrlEncode 对它们进行编码。

这里是修改你的代码:

注意:将第二个请求函数包装在 using 中，就像我为您做的第一个请求一样:

string URI = "https://www.citius.mj.pt/Portal/consultas/ConsultaVendaAnuncios.aspx";

CookieContainer cc = new CookieContainer();
HttpWebRequest h = (HttpWebRequest)WebRequest.Create(URI);
h.CookieContainer = cc;
HttpWebResponse hr = (HttpWebResponse)h.GetResponse();
using (var s = hr.GetResponseStream())
{
    using (var r = new StreamReader(s, Encoding.UTF8))
    {
        string html = r.ReadToEnd();
        //Console.WriteLine(html);

        Match mVS = Regex.Match(html, "id=\"__VIEWSTATE\" value=\"(.*?)\"", RegexOptions.Singleline);
        //Console.WriteLine(mVS.Groups[1].Value);
        Match mEV = Regex.Match(html, "id=\"__EVENTVALIDATION\" value=\"(.*?)\"", RegexOptions.Singleline);

        Dictionary<string, string> param = new Dictionary<string, string>();
        param.Add("ctl00$ContentPlaceHolder1$ScriptManager1", "ctl00$ContentPlaceHolder1$ScriptManager1|ctl00$ContentPlaceHolder1$btnSearch");
        param.Add("__EVENTTARGET", "");
        param.Add("__EVENTARGUMENT", "");
        param.Add("__LASTFOCUS", "");
        param.Add("__VIEWSTATE", mVS.Groups[1].Value);
        param.Add("__EVENTVALIDATION", mEV.Groups[1].Value);
        param.Add("ctl00$ContentPlaceHolder1$rbtlTribunais", "False");
        param.Add("ctl00$ContentPlaceHolder1$ddlTribunais", "- Todos os Tribunais -");
        param.Add("ctl00$ContentPlaceHolder1$rblDias", "todos");
        param.Add("__ASYNCPOST", "true");
        param.Add("ctl00$ContentPlaceHolder1$btnSearch", "Pesquisar");
        string post = "";
        foreach (var i in param) post += WebUtility.UrlEncode(i.Key) + "=" + WebUtility.UrlEncode(i.Value) + "&";

        var data = Encoding.UTF8.GetBytes(post);
        Console.WriteLine(data.Length);

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URI);
        request.CookieContainer = cc;
        request.Referer = URI;
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
        request.UserAgent = "Mozilla/5.0 (Windows NT 6.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36";
        request.Headers.Add("Origin", "https://www.citius.mj.pt");
        request.Headers.Add("X-Requested-With", "XMLHttpRequest");
        request.Headers.Add("X-MicrosoftAjax: Delta=true");
        request.ContentLength = data.Length;

        using (var stream = request.GetRequestStream())
        {
            stream.Write(data, 0, data.Length);
        }

        HttpWebResponse response = (HttpWebResponse)request.GetResponse();

        var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

        Console.WriteLine(responseString);
    }
}

关于C# - Webclient 发布数据问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35602025/

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