I'm always getting time out with this code.
the post is https and works fine, but never get a response,
I try with HttpWebRequest and WebRequest, with more timeout, but no response
can you help me?
>System.Net.ServicePointManager.CertificatePolicy = New TrustAllCertificatePolicy()
>
>req = HttpWebRequest.Create(URL)
>req.Method = "POST"
>req.Timeout = 60000
>
>Dim byteArray = Encoding.UTF8.GetBytes(URL)
>
>req.ContentType = "text/xml"
>
>req.ContentLength = byteArray.Length
>
>Dim dataStream As Stream
>dataStream = req.GetRequestStream()
>
>dataStream.Write(byteArray, 0, byteArray.Length)
>
>dataStream.Close()
>dataStream.Dispose()
>
>Dim response As HttpWebResponse = Nothing
>
><b>response = req.GetResponse() '---->>> always timeout here </b>
>
>dataStream = response.GetResponseStream()
>
>Dim reader As StreamReader
>reader = New StreamReader(dataStream)
>
>Dim responseFromServer As String
>responseFromServer = reader.ReadToEnd()
>reader.Close()
>dataStream.Close()
>dataStream.Dispose()
>response.Close()
Related
i must download some information from API exposed by a server, but whit information in my hand i'm very in difficult.
my code :
Dim request As HttpWebRequest
Dim response As HttpWebResponse = Nothing
Dim reader As StreamReader
Dim address As Uri
Dim data As StringBuilder
Dim byteData() As Byte
Dim postStream As Stream = Nothing
address = New Uri("https://www.xxxxxxx.com/api/ajax/widget/refreshWidget")
request = DirectCast(WebRequest.Create(address), HttpWebRequest)
request.Method = "POST"
request.Headers("Authorization") = "Bearer " & "owvNGiOautorizzazoGDNHVGpSO2xcVzE8207JqnjNj"
request.Accept = "application/json"
request.ContentType = "multipart/form-data"
request.Host = "www.xxxxxxx.com"
request.ContentType = "application/x-www-form-urlencoded"
request.Headers.Add("userid", "238")
request.Headers.Add("usernodeid", "1036")
request.Headers.Add("dashboardid", "589")
request.Headers.Add("widgetid", "6699")
data = New StringBuilder()
'data.Append("type: " & HttpUtility.UrlEncode("datatable"))
data.Append(body) 'HttpUtility.UrlEncode(body))
byteData = UTF8Encoding.UTF8.GetBytes(data.ToString())
request.ContentLength = byteData.Length
Try
postStream = request.GetRequestStream()
postStream.Write(byteData, 0, byteData.Length)
Finally
If Not postStream Is Nothing Then postStream.Close()
End Try
Try
response = DirectCast(request.GetResponse(), HttpWebResponse)
reader = New StreamReader(response.GetResponseStream())
Debug.Print(reader.ReadToEnd())
Finally
If Not response Is Nothing Then response.Close()
End Try
with this code i can access to API whit no error,
but i can't receive anythings.
I'm trying to send sms from win7 pc/64bit, visual studio 2015, vb.net,
using Huawei Wingle e8231s - 2 GSM Wifi Stick,
The GSM Wifi Stick web interface makes calls to API that I'm trying to mimic.
To do so, a Login request must done first, with header contains both verification token and cookie(session id), which I can get by requesting from the wingle webserver.
I always have The response code is 108006 which is incorrect username or password.
My code:
Public Sub Main()
Dim request As WebRequest = WebRequest.Create("http://192.168.8.1/api/webserver/SesTokInfo")
Dim response As WebResponse = request.GetResponse()
Dim dataStream As Stream = response.GetResponseStream()
' Open the stream using a StreamReader for easy access.
Dim reader As New StreamReader(dataStream)
' Read the content.
Dim responseFromServer As String = reader.ReadToEnd()
' Extract the header: cookie is the session id.
Dim SesStart As Short = responseFromServer.IndexOf("<SesInfo>") + 9
Dim SesEnd As Short = responseFromServer.IndexOf("</SesInfo>")
Dim TokStart As Short = responseFromServer.IndexOf("<TokInfo>") + 9
Dim TokEnd As Short = responseFromServer.IndexOf("</TokInfo>")
Dim vSessionId As String = responseFromServer.Substring(SesStart, SesEnd - SesStart)
Dim vToken As String = responseFromServer.Substring(TokStart, TokEnd - TokStart)
' Clean up the streams and the response.
reader.Close()
response.Close()
'Call SetSesAndToken(response)
'Make the api call using the session ID extracted
request = WebRequest.Create("http://192.168.8.1/api/user/login")
request.Headers.Add("__RequestVerificationToken", vToken)
request.Headers.Add("Cookie", vSessionId)
Dim PassWordEncoded As String = Convert.ToBase64String(Encoding.UTF8.GetBytes("admin"))
Dim Myxml As String = "<?xml version:'1.0' encoding='UTF-8'?>
<request>
<Username>admin</Username>
<Password>" & PassWordEncoded & "</Password>
<password_type>4</password_type>
</request>"
Dim bytes As Byte() = Encoding.UTF8.GetBytes(Myxml)
request.Method = "POST"
request.ContentLength = bytes.Length
request.ContentType = "text/xml"
Using requestStream As Stream = request.GetRequestStream()
requestStream.Write(bytes, 0, bytes.Length)
End Using
Dim ReceiveStream As Stream
Dim encode As Encoding
Dim sr As StreamReader
Using myresponse As HttpWebResponse = DirectCast(request.GetResponse(), HttpWebResponse)
If myresponse.StatusCode <> HttpStatusCode.OK Then
Dim message As String = [String].Format("POST failed. Received HTTP {0}", myresponse.StatusCode)
Throw New ApplicationException(message)
End If
ReceiveStream = myresponse.GetResponseStream()
encode = System.Text.Encoding.GetEncoding("utf-8")
sr = New StreamReader(ReceiveStream)
responseFromServer = sr.ReadToEnd()
MsgBox(responseFromServer)
End Using
You need to have a cookie container and keep your container with the cookies for subsequent calls. You first do a GET to retreive the security token and/or other cookies then you make other calls like login etc.
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12
Dim FormData As String = "login_user=&wallet=0x29a450d32a95b0b08230b93cc9ac328db81dc80e"
Dim cookiejar As New CookieContainer
Dim webreq As HttpWebRequest = HttpWebRequest.Create("https://somesite.org")
Dim responseReader As StreamReader
Dim responseData As String
Dim requestWriter As StreamWriter
webreq.Method = HttpMethod.Get.Method
webreq.CookieContainer = cookiejar
Dim xxx As HttpWebResponse = webreq.GetResponse()
responseReader = New StreamReader(webreq.GetResponse.GetResponseStream())
responseData = responseReader.ReadToEnd()
responseReader.Close()
webreq = HttpWebRequest.Create("https://somesite.org")
webreq.Accept = "text/html"
webreq.Method = HttpMethod.Post.Method
webreq.ContentType = "application/x-www-form-urlencoded"
webreq.ContentLength = FormData.Length
webreq.CookieContainer = cookiejar
requestWriter = New StreamWriter(webreq.GetRequestStream)
requestWriter.Write(FormData)
requestWriter.Close()
responseReader = New StreamReader(webreq.GetResponse.GetResponseStream())
responseData = responseReader.ReadToEnd()
responseReader.Close()
Code to Authenticate your modem:
Public Sub Main()
' Hitting the starting page
Dim cookiejar As New CookieContainer
Dim request As WebRequest = WebRequest.Create("http://192.168.8.1/api/user/state-login")
request.CookieContainer = cookiejar
Dim response As WebResponse = request.GetResponse()
Dim dataStream As Stream = response.GetResponseStream()
' Open the stream using a StreamReader for easy access.
Dim reader As New StreamReader(dataStream)
' Read the content.
Dim responseFromServer As String = reader.ReadToEnd()
' Extract the header: cookie is the session id.
' Dim SesStart As Short = responseFromServer.IndexOf("<SesInfo>") + 9
' Dim SesEnd As Short = responseFromServer.IndexOf("</SesInfo>")
' Dim TokStart As Short = responseFromServer.IndexOf("<TokInfo>") + 9
' Dim TokEnd As Short = responseFromServer.IndexOf("</TokInfo>")
' Dim vSessionId As String = responseFromServer.Substring(SesStart, SesEnd - SesStart)
' Dim vToken As String = responseFromServer.Substring(TokStart, TokEnd - TokStart)
' Clean up the streams and the response.
reader.Close()
response.Close()
' Hitting the login api endpoint
'Call SetSesAndToken(response)
'Make the api call using the session ID extracted
request = WebRequest.Create("http://192.168.8.1/api/user/login")
request.CookieContainer = cookiejar
Dim PassWordEncoded As String = Convert.ToBase64String(Encoding.UTF8.GetBytes("admin"))
Dim Myxml As String = "<?xml version:'1.0' encoding='UTF-8'?>
<request>
<Username>admin</Username>
<Password>" & PassWordEncoded & "</Password>
<password_type>4</password_type>
</request>"
Dim bytes As Byte() = Encoding.UTF8.GetBytes(Myxml)
request.Method = "POST"
request.ContentLength = bytes.Length
request.ContentType = "text/xml"
Using requestStream As Stream = request.GetRequestStream()
requestStream.Write(bytes, 0, bytes.Length)
End Using
Dim ReceiveStream As Stream
Dim encode As Encoding
Dim sr As StreamReader
Using myresponse As HttpWebResponse = DirectCast(request.GetResponse(), HttpWebResponse)
If myresponse.StatusCode <> HttpStatusCode.OK Then
Dim message As String = [String].Format("POST failed. Received HTTP {0}", myresponse.StatusCode)
Throw New ApplicationException(message)
End If
ReceiveStream = myresponse.GetResponseStream()
encode = System.Text.Encoding.GetEncoding("utf-8")
sr = New StreamReader(ReceiveStream)
responseFromServer = sr.ReadToEnd()
MsgBox(responseFromServer)
End Using
void SaveUrl(string sourceURL, string savepath) {
CookieContainer cookies = new CookieContainer();
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(sourceURL);
webRequest.CookieContainer = cookies;
HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse();
StreamReader responseReader = new StreamReader(response.GetResponseStream());
string sResponseHTML = responseReader.ReadToEnd();
using (StreamWriter sw = new StreamWriter(savepath, false)) {
sw.Write(sResponseHTML);
}
string[] ImageUrl = GetImgLinks(sResponseHTML);
foreach (string imagelink in ImageUrl) {
HttpWebRequest imgRequest = (HttpWebRequest)WebRequest.Create(imagelink);
imgRequest.CookieContainer = cookies;
HttpWebResponse imgresponse = (HttpWebResponse)imgRequest.GetResponse();
//Code to save image
}
}
Test it out I am not a .net guy. Good Luck!
The cleaner approach is to create a Session for HTTP requests instead of hitting individual api endpoints. In this case the cookies will be sent by default.If you have enough time you can explore AT commands also. Good luck!
Code to Authenticate your modem:
Public Sub Main()
' Hitting the starting page
Dim cookiejar As New CookieContainer
Dim request As WebRequest = WebRequest.Create("http://192.168.8.1/api/user/state-login")
request.CookieContainer = cookiejar
Dim response As WebResponse = request.GetResponse()
Dim dataStream As Stream = response.GetResponseStream()
' Open the stream using a StreamReader for easy access.
Dim reader As New StreamReader(dataStream)
' Read the content.
Dim responseFromServer As String = reader.ReadToEnd()
' Extract the header: cookie is the session id.
' Dim SesStart As Short = responseFromServer.IndexOf("<SesInfo>") + 9
' Dim SesEnd As Short = responseFromServer.IndexOf("</SesInfo>")
' Dim TokStart As Short = responseFromServer.IndexOf("<TokInfo>") + 9
' Dim TokEnd As Short = responseFromServer.IndexOf("</TokInfo>")
' Dim vSessionId As String = responseFromServer.Substring(SesStart, SesEnd - SesStart)
' Dim vToken As String = responseFromServer.Substring(TokStart, TokEnd - TokStart)
' Clean up the streams and the response.
reader.Close()
response.Close()
' Hitting the login api endpoint
'Call SetSesAndToken(response)
'Make the api call using the session ID extracted
request = WebRequest.Create("http://192.168.8.1/api/user/login")
request.CookieContainer = cookiejar
Dim PassWordEncoded As String = Convert.ToBase64String(Encoding.UTF8.GetBytes("admin"))
Dim Myxml As String = "<?xml version:'1.0' encoding='UTF-8'?>
<request>
<Username>admin</Username>
<Password>" & PassWordEncoded & "</Password>
<password_type>4</password_type>
</request>"
Dim bytes As Byte() = Encoding.UTF8.GetBytes(Myxml)
request.Method = "POST"
request.ContentLength = bytes.Length
request.ContentType = "text/xml"
Using requestStream As Stream = request.GetRequestStream()
requestStream.Write(bytes, 0, bytes.Length)
End Using
Dim ReceiveStream As Stream
Dim encode As Encoding
Dim sr As StreamReader
Using myresponse As HttpWebResponse = DirectCast(request.GetResponse(), HttpWebResponse)
If myresponse.StatusCode <> HttpStatusCode.OK Then
Dim message As String = [String].Format("POST failed. Received HTTP {0}", myresponse.StatusCode)
Throw New ApplicationException(message)
End If
ReceiveStream = myresponse.GetResponseStream()
encode = System.Text.Encoding.GetEncoding("utf-8")
sr = New StreamReader(ReceiveStream)
responseFromServer = sr.ReadToEnd()
MsgBox(responseFromServer)
End Using
void SaveUrl(string sourceURL, string savepath) {
CookieContainer cookies = new CookieContainer();
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(sourceURL);
webRequest.CookieContainer = cookies;
HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse();
StreamReader responseReader = new StreamReader(response.GetResponseStream());
string sResponseHTML = responseReader.ReadToEnd();
using (StreamWriter sw = new StreamWriter(savepath, false)) {
sw.Write(sResponseHTML);
}
string[] ImageUrl = GetImgLinks(sResponseHTML);
foreach (string imagelink in ImageUrl) {
HttpWebRequest imgRequest = (HttpWebRequest)WebRequest.Create(imagelink);
imgRequest.CookieContainer = cookies;
HttpWebResponse imgresponse = (HttpWebResponse)imgRequest.GetResponse();
//Code to save image
}
}
Please test it out I am not a .net guy. Good Luck!
I have been trying to send an HTTP post to a web service and got this message:
"The 'Content-Type' header must be modified using the appropiat
property or method, Parameter nama:name"
This happens when i try to update a customer with this JSON fotmat :
{"display_name":"john smith","email":"johnsmith#something","company_name":"enterprise"}
This is a part of the code i have been using to connect to the API:
Dim sUrl As String = "https://subscriptions.zoho.com/api/v1/customers"
Dim wHeader As WebHeaderCollection = New WebHeaderCollection()
Dim wRequest As HttpWebRequest = DirectCast(System.Net.HttpWebRequest.Create(sUrl), HttpWebRequest)
wHeader.Clear()
wHeader.Add("Authorization: Zoho-authtoken 7ca5747efb3be868e155e707e679f9f5")
wHeader.Add("X-com-zoho-subscriptions-organizationid: 397080968")
wHeader.Add("Content-Type: application/json;charset=UTF-8")
wRequest.Accept = "application/json"
MsgBox(wHeader.ToString)
wRequest.Headers = wHeader
wRequest.Method = "POST"
Dim postData As String = sw.ToString
MsgBox(postData)
Dim byteArray As Byte() = Encoding.UTF8.GetBytes(postData)
wRequest.ContentLength = byteArray.Length
Dim dataStream As Stream = wRequest.GetRequestStream()
dataStream.Write(byteArray, 0, byteArray.Length)
dataStream.Close()
Dim response As WebResponse = wRequest.GetResponse()
Console.WriteLine(CType(response, HttpWebResponse).StatusDescription)
dataStream = response.GetResponseStream()
Dim reader As New StreamReader(dataStream)
Dim responseFromServer As String = reader.ReadToEnd()
Console.WriteLine(responseFromServer)
LblResponse.Text = sResponse
Console.WriteLine(sResponse)
reader.Close()
dataStream.Close()
response.Close()
Catch ex As Exception
If ex.InnerException IsNot Nothing Then
LblResponse.Text = ex.Message + " >> " + ex.InnerException.ToString()
Else
LblResponse.Text = ex.Message
End If
End Try
any ideas ?
Here's my code that I am using to send as post to the specified URL.
Dim url = "http://www.abc.com/new/process"
Dim data As String = nvc.ToString
Dim postAddress = New Uri(Url)
Dim request = DirectCast(WebRequest.Create(postAddress), HttpWebRequest)
request.Method = "POST"
request.ContentType = "application/json"
Dim postByteData As Byte() = UTF8Encoding.UTF8.GetBytes(data)
request.ContentLength = postByteData.Length
Using postStream As Stream = request.GetRequestStream()
postStream.Write(postByteData, 0, postByteData.Length)
End Using
Using resp = TryCast(request.GetResponse(), HttpWebResponse)
Dim reader = New StreamReader(resp.GetResponseStream())
result.Response = reader.ReadToEnd()
End Using
Now the problem is I don't get any exception here, but the response I'm supposed to get after posting (success or error) is not coming to my end. The URL is fine, I checked it. Am I sending it the right way?
I believe the issue is that ReadToEnd method on StreamReader internally uses the Length property. This will be null if the server doesn't send a length in the http header. Try using memory stream and a buffer instead:
Dim url = "http://my.posturl.com"
Dim data As String = nvc.ToString()
Dim postAddress = New Uri(url)
Dim request As HttpWebRequest = WebRequest.Create(postAddress)
request.Method = "POST"
request.ContentType = "application/json"
Dim postByteData As Byte() = UTF8Encoding.UTF8.GetBytes(data)
request.ContentLength = postByteData.Length
Using postStream As Stream = request.GetRequestStream()
postStream.Write(postByteData, 0, postByteData.Length)
End Using
Using resp = TryCast(request.GetResponse(), HttpWebResponse)
Dim b As Byte() = Nothing
Using stream As Stream = resp.GetResponseStream()
Using ms As New MemoryStream()
Dim count As Integer = 0
Do
Dim buf As Byte() = New Byte(1023) {}
count = stream.Read(buf, 0, 1024)
ms.Write(buf, 0, count)
Loop While stream.CanRead AndAlso count > 0
b = ms.ToArray()
End Using
End Using
Console.WriteLine("Response: " + Encoding.UTF8.GetString(b))
Console.ReadLine()
End Using
Hi am trying to make an application that post data to a joomla login page but the only thing i get back is cookies is not enabled.
Function GetPage(ByVal Url As String) As String
Dim CookieJar As New Net.CookieContainer
Dim enc As Encoding = Encoding.GetEncoding(1252)
Dim Data As Byte() = Nothing
Dim PostData As String = ""
If InStr(Url, "?") <> 0 Then
PostData = Url.Substring(InStr(Url, "?"))
Url = Replace(Url, PostData, "")
Url = Url.TrimEnd("?"c)
Data = enc.GetBytes(PostData)
End If
Dim req As System.Net.HttpWebRequest = CType(Net.WebRequest.Create(Url), Net.HttpWebRequest)
req.AllowAutoRedirect = False
req.ContentType = "application/x-www-form-urlencoded"
req.Method = "POST"
If Not Data Is Nothing Then
If Data.Length > 0 Then
req.ContentLength = Data.Length
Dim newStream As Stream = req.GetRequestStream()
newStream.Write(Data, 0, Data.Length)
newStream.Flush()
newStream.Close()
End If
End If
req.CookieContainer = CookieJar
Dim Response As Net.HttpWebResponse = CType(req.GetResponse(), Net.HttpWebResponse)
Dim ResponseStream As IO.StreamReader = New IO.StreamReader(Response.GetResponseStream(), enc)
Dim Html As String = ResponseStream.ReadToEnd()
Response.Close()
ResponseStream.Close()
Return Html
End Function
How should i do?
Try to set .CookieContainer before writing any data to .GetRequestStream()
Look this sample:
CookieContainer cookies = new CookieContainer();
HttpWebRequest postRequest = (HttpWebRequest)WebRequest.Create(site);
postRequest.CookieContainer = cookies; // note this
postRequest.Method = "POST";
postRequest.ContentType = "application/x-www-form-urlencoded";
using (Stream stream = postRequest.GetRequestStream())
{
stream.Write(buffer, 0, buffer.Length);
}