How to make postback request to ASP.NET page? I caught data by the Fiddler and tried to make the same request with HttpWebRequest class, but I receive short answer in wrong encoding. (Various encoding tried also, no result)
Here is the part of code:
var req = (HttpWebRequest)WebRequest.Create("http://mySite.aspx?test=test");
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded; charset=utf-8";
req.Accept="*/*";
req.Headers.Add("Accept-Language", "en-us");
req.Referer="http://mysiterefer.com";
req.Headers.Add("x-microsoftajax", "Delta=true");
req.Headers.Add("Cache-Control", "no-cache");
req.Headers.Add("Accept-Encoding", "gzip, deflate");
req.UserAgent="Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3; AskTbFXTV5/5.15.1.22229)";
req.Headers.Add("Pragma", "no-cache");
req.Headers.Add("Cookie", "ASP.NET_SessionId=blablablaxur445; vehicle=1=2011##VAZ##2101##; s_cc=true; s_p_s_prop8=typed-bookmarked; ev_36_getval=20120501%2000; s_sq=%5B%5BB%5D%5D");
string postData = "__EVENTTARGET=lalalala&__EVENTARGUMENT=&__LASTFOCUS=&__VIEWSTATE=veryLongBase64string&__ASYNCPOST=true&";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
req.ContentLength = byteArray.Length;
Stream dataStream = req.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
using (var response = (HttpWebResponse)req.GetResponse())
{
StreamReader objReader = new StreamReader(response.GetResponseStream());
string str = objReader.ReadToEnd();
...
}
So, who can provide example with postback request?
Related
Trying to POST a webrequest but not getting the actual results.. webrequest not getting submit. Previously this code was working fine in 2018. I'm not sure if they changed something at their end. I copied all the latest parameters, and other stuff from fiddler. Is there anyone please look into it as my deadline for the actual project is very tight and this code is just an integral part of the main project and was assuming it is functional already.. already spent few hours on this..
CookieContainer _cookies = new CookieContainer();
string urls = "https://ww3.freddiemac.com/loanlookup?Phone=&Email=&Contact=&lang=en&fname=TEST&lname=PERSON&strt_nbr=123&unit_num=&strt_name=FAKE STREET&strt_suffix=&addr_city=CHICAGO&addr_state=IL&addr_zip=60628&ssn=1234&Verify=Yes";
var request = (HttpWebRequest)WebRequest.Create(urls);
request.Host = "ww3.freddiemac.com";
request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36 Edg/83.0.478.61";
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9";
WebHeaderCollection myWebHeaderCollection = request.Headers;
myWebHeaderCollection.Add("Accept-Language", "en-US,en;q=0.9");
request.Headers["Accept-Encoding"] = "gzip, deflate, br";
request.ContentType = "application/x-www-form-urlencoded";
request.Method = "POST";
request.Referer = "https://ww3.freddiemac.com/loanlookup";
var encoding = new ASCIIEncoding();
var postBytes = encoding.GetBytes(urls);
request.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip | DecompressionMethods.None;
request.ContentLength = postBytes.Length;
request.CookieContainer = _cookies;
request.KeepAlive = true;
var requestStream = request.GetRequestStream();
requestStream.Write(postBytes, 0, postBytes.Length);
requestStream.Close();
var response = (HttpWebResponse)request.GetResponse();
string html;
using (var reader = new StreamReader(response.GetResponseStream()))
{
html = reader.ReadToEnd();
}
if (html.Contains("No. Our records show"))
{
_qualified = false;
}
I have tried to create a httpwebrequest for post request to api site. The header details below;enter image description here
and I have tried below code;
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create("https://www.etc.com/c/search");
//webRequest.Credentials = cache;
//webRequest.PreAuthenticate = true;
//header description
webRequest.Method = "POST";
webRequest.Connection = "keep-alive";
//webRequest.KeepAlive = true;
byte[] byteArray = Encoding.UTF8.GetBytes("{\"contains\":true,\"empName\":RAGS TO RACHES,\"injuryDate\":04/13/2018,\"state\":UT,\"stCd\":43}");
webRequest.Accept = "q=0.8;application/json;q=0.9";
webRequest.UserAgent = #"Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0";
webRequest.ContentType = "application/json";
webRequest.ContentLength = byteArray.Length;
webRequest.Referer = "https://www.etc.com/c/search";
webRequest.Headers.Add("Accept-Encoding: gzip, deflate, br");
webRequest.Headers.Add("Accept-Language: en-US,en;q=0.5");
//webRequest.Headers.Add("Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3");
using (Stream webpageStream = webRequest.GetRequestStream())
{
webpageStream.Write(byteArray, 0, byteArray.Length);
}
Not getting resposne.
I'm trying to make a POST request to a website using C#.
I tried this code first :
byte[] buffer = Encoding.UTF8.GetBytes(postData);
HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create("https://www.foo.com");
WebReq.Method = "POST";
WebReq.Accept = "*/*";
WebReq.Headers.Add("Accept-Encoding","gzip, deflate");
WebReq.UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36";
WebReq.ContentType = "application/x-www-form-urlencoded";
WebReq.ContentLength = buffer.Length;
Stream PostData = WebReq.GetRequestStream();
PostData.Write(buffer, 0, buffer.Length);
PostData.Close();
HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
Stream Answer = WebResp.GetResponseStream();
StreamReader _Answer = new StreamReader(Answer);
String reply = _Answer.ReadToEnd();
//do some tasks on reply
Turns out that this always returned this error : "underlying connection was closed..."
I found out that it's because the site only accepts TLS. So I added this at the beggining of the code:
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11;
The site accepted the request, but now I can't read the response I'm getting, it's encrypted to something like this :
��;ks�J���+&�$�� zYK)�NN�{������TJ5� � ��`���o� H �؎]��(K0��~� >~|����}NbL?��ϾG^='�/�����~<�k$��|��P�
I need to perform some tasks on the response, so I need to decrypt it within the code... I'm open to ideas ! Thanks in advance !
I would like to download an image from this url http://squirlytraffic.com/surficon.php?ts=1491591235
I tried this code but I don't see the image when I open it.
using (WebClient client = new WebClient())
{
client.DownloadFile("http://squirlytraffic.com/surficon.php?ts=1491591235", #"D:\image.jpg");
}
You need to set your credentials using the the WebClient Credentials property. You can do this by assigning it an instance of NetworkCredential. See below:
using (WebClient client = new WebClient()){
client.Credentials = new NetworkCredential("user-name", "password");
client.DownloadFile("url", #"file-location");
}
EDIT
If you don't want to hard code a username and password, you can set the UseDefaultCredentials property of the WebClient to true. This will use the credentials of the currently logged in user. From the documentation.
The Credentials property contains the authentication credentials used to access a resource on a host. In most client-side scenarios, you should use the DefaultCredentials, which are the credentials of the currently logged on user. To do this, set the UseDefaultCredentials property to true instead of setting this property.
Which would mean you could amend the above code to:
using (WebClient client = new WebClient()){
client.UseDefaultCredentials = true;
client.DownloadFile("url", #"file-location");
}
Try this way, those parameters are passed when login
StringBuilder postData = new StringBuilder();
postData.Append("login=" + HttpUtility.UrlEncode("username") + "&");
postData.Append("password=" + HttpUtility.UrlEncode("password") + "&");
postData.Append("Submit=" + HttpUtility.UrlEncode("Login"));
ASCIIEncoding ascii = new ASCIIEncoding();
byte[] postBytes = ascii.GetBytes(postData.ToString());
CookieContainer cc = new CookieContainer();
HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create("http://squirlytraffic.com/members.php");
webReq.Method = "POST";
webReq.ContentType = "application/x-www-form-urlencoded";
webReq.ContentLength = postBytes.Length;
webReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
webReq.CookieContainer = cc;
Stream postStream = webReq.GetRequestStream();
postStream.Write(postBytes, 0, postBytes.Length);
postStream.Flush();
postStream.Close();
HttpWebResponse res = (HttpWebResponse)webReq.GetResponse();
HttpWebRequest ImgReq = (HttpWebRequest)WebRequest.Create("http://squirlytraffic.com/surficon.php?ts=1491591235");
ImgReq.Method = "GET";
ImgReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
ImgReq.CookieContainer = cc;
HttpWebResponse ImgRes = (HttpWebResponse)ImgReq.GetResponse();
Stream Img = ImgRes.GetResponseStream();
After authorisation on www.vkontakte.ru through ie8 me spans on page: www.vkontakte.ru/MyPage. But I cannot receive www.vkontakte.ru/MyPage through a code
HttpWebRequest authRequest = (HttpWebRequest)WebRequest.Create(new Uri("http://vkontakte.ru/login.php", UriKind.Absolute));
authRequest.CookieContainer = new CookieContainer();
authRequest.AllowAutoRedirect = false;
string param = string.Format("email={0}&pass={1}&expire=1", HttpUtility.UrlEncode("---"), HttpUtility.UrlEncode("---"));
authRequest.Method = "POST";
authRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)";
authRequest.ContentType = "application/x-www-form-urlencoded";
authRequest.ContentLength = param.Length;
authRequest.GetRequestStream().Write(Encoding.GetEncoding(1251).GetBytes(param), 0, param.Length);
HttpWebResponse authResponse = (HttpWebResponse)authRequest.GetResponse();
listBox1.Items.Add(authRequest.Address);
Returns http://vkontakte.ru/ instead of www.vkontakte.ru/MyPage =(
HttpContext.Current.Request.Url.AbsoluteUri - can help?
help me!
You forgot to close the request stream.
You should write the following:
using (Stream requestStream = authRequest.GetRequestStream())
using (StreamWriter writer = new StreamWriter(requestStream, Encoding.GetEncoding(1251))
writer.Write(param);
Also, you should run Fiddler check what the request and response look like.