Develop Reference

C# python http post to C# httpwebrequest

i try to figure it out the black box of the server side that code by python for sending http post. In C# i trying to use httpwebrequest and httpwebresponse to send and receive message back from the server side.
Below is the python code:
**# Request login to server**
import httplib, urllib, requests
import sys, time
from requests.adapters import HTTPAdapter
import select, socket
s = requests.Session()
url = 'http://192.168.1.1/request_login'
data = 'user.login(test,test)' #login account and password set here
r = s.post(url, data=data)
if r.status_code != 200:
print "Failed loging in (%d)" % (r.status_code)
sys.exit(-1)
**# send key file to server**
url = 'http://192.168.1.1/request_sendfile'
files = {'file': (data_xml, open(data_xml, 'rb'), 'application/x-binary', {'Expires': '0'})} # **Don't understand this format**
r = s.post(url, files=files, timeout=30.0)
if r.status_code != 200:
print "Failed sending data file (%d, %s)" % (r.status_code, r.reason)
url = 'http://192.168.1.1/request_sendfile'
data = 'reader.view_log(4)'
r = s.post(url, data=data)
if r.status_code != 200:
print "Failed loging in (%d)" % (r.status_code)
sys.exit(-3)
print "Logs: "
print r.content
sys.exit(-4)
Above is the code for login and sending file to server in one session, i try to use C# do the same way.
I set two http request at the same time, however for the login is success while try to get second http request i get an error of "400" doesn't understand context of verb.
Below is the C# code:
private void httpost()
{
try
{
string Url = "http://192.168.1.1/request_login";
string Urls = "http://192.168.1.1/request_sendfile";
HttpWebRequest request = HttpWebRequest.Create(Url) as HttpWebRequest;
HttpWebRequest requests = HttpWebRequest.Create(Urls) as HttpWebRequest;
string result = null;
request.Method = "POST";
request.KeepAlive = true;
request.ContentType = "login";
string param = "user.login(test,test)";
byte[] bs = Encoding.ASCII.GetBytes(param);
using (Stream reqStream = request.GetRequestStream())
{
reqStream.Write(bs, 0, bs.Length);
}
using (WebResponse response = request.GetResponse())
{
StreamReader sr = new StreamReader(response.GetResponseStream());
HttpWebResponse resp = (HttpWebResponse)request.GetResponse();
if(resp.StatusCode == HttpStatusCode.OK)
{
richTextBox1.AppendText("Login Response Status:" + resp.StatusCode + "\n");
}
else
{
richTextBox1.AppendText("Login Response Failed: " + resp.StatusCode + "\n");
}
request.KeepAlive = true;
result = sr.ReadToEnd();
sr.Close();
}
using (Stream importFile = requests.GetRequestStream())
{
FileStream fs = File.OpenRead(#"data.xml");
byte[] bytes = ReadWholeArray(fs); // turn xml file to byte function
requests.ContentType = "application/x-binary";
requests.Method = "POST";
importFile.Write(bytes, 0, bytes.Length);
}
using (WebResponse responses = requests.GetResponse())
{
StreamReader srs = new StreamReader(responses.GetResponseStream());
result = srs.ReadToEnd();
srs.Close();
}
}
catch (Exception ex)
{
richTextBox1.AppendText("Exception Throw:" + ex.Message);
}
}
I try the python code it request login and send file at the same time.
And below is the code that i don't understand.
files = {'file': (data_xml, open(data_xml, 'rb'), 'application/x-binary', {'Expires': '0'})}

Make http WebRequest work in C#

I want to get a respond from an http website,I have used this code
// Create a new request to the mentioned URL.
WebRequest myWebRequest = WebRequest.Create("http://127.0.0.1:8080/geoserver/NosazMohaseb/ows?service=WFS&version=1.0.0&request=GetFeature&typeName=NosazMohaseb:GParcelLAyer&maxFeatures=50&outputFormat=application%2Fjson&bbox=5727579.437775434,3838435.3419322656,5727581.1322169611,3838437.0363737918");
// var myWebRequest = WebRequest.Create(myUri);
myWebRequest.Method ="GET";
myWebRequest.Timeout = TimeOut;
if (myWebRequest is HttpWebRequest)
{
( myWebRequest as HttpWebRequest).Accept = "application/json";
(myWebRequest as HttpWebRequest).ContentType = "application/json";
//(myWebRequest as HttpWebRequest).Accept =
(myWebRequest as HttpWebRequest).KeepAlive = false;
(myWebRequest as HttpWebRequest).UserAgent = "SharpMap-WMSLayer";
}
if (Credentials != null)
{
myWebRequest.Credentials = Credentials;
myWebRequest.PreAuthenticate = true;
}
else
myWebRequest.Credentials = CredentialCache.DefaultCredentials;
if (Proxy != null)
myWebRequest.Proxy = Proxy;
try
{
using (var myWebResponse = (HttpWebResponse)myWebRequest.GetResponse())
{
using (var dataStream = myWebResponse.GetResponseStream())
{
var cLength = (int)myWebResponse.ContentLength;
}
myWebResponse.Close();
}
}
catch (WebException webEx)
{
if (!this.ContinueOnError)
throw (new RenderException(
"There was a problem connecting to the WMS server when rendering layer '" + LayerName + "'",
webEx));
}
catch (Exception ex)
{
if (!ContinueOnError)
throw (new RenderException("There was a problem rendering layer '" + LayerName + "'", ex));
}
But when I try to get cLength it is -1,So it does not work,But When I try to access this website
http://127.0.0.1:8080/geoserver/NosazMohaseb/ows?service=WFS&version=1.0.0&request=GetFeature&typeName=NosazMohaseb:GParcelLAyer&maxFeatures=50&outputFormat=application%2Fjson&bbox=5727579.437775434,3838435.3419322656,5727581.1322169611,3838437.0363737918
I get following answer
{"type":"FeatureCollection","totalFeatures":2,"features":[{"type":"Feature","id":"GParcelLAyer.14970","geometry":{"type":"Polygon","coordinates":[[[5727597.96542913,3838442.73401128],[5727595.60003176,3838429.21114233],[5727576.62444883,3838431.10604568],[5727571.16785106,3838432.76483769],[5727569.78420277,3838437.30665986],[5727570.19434939,3838439.63808217],[5727597.96542913,3838442.73401128]]]},"geometry_name":"geom","properties":{"FK_BlockNo":"12055","FK_LandNo":"8","NoApart":"100000","Name":" ","Family":"??","Father":" ","MeliNo":" ","MalekType":"1 ","PostCode":"0 ","Id_Parvande":null,"BuildNo":null,"BuildTypeCode":null,"BuildUserTypeCode":null,"BuildViewTypeCode":null,"BuildGhedmatCode":null,"Farsoode":"0"}}],"crs":{"type":"name","properties":{"name":"urn:ogc:def:crs:EPSG::900913"}}}
So it seems I am missing somthing while getting respond using C#..Can you please help me find my mistake?
thanks

In your code you're actually just getting response stream and later you're not reading anything from this stream - that's why you're not getting any data.
You have to create stream reader and use it to read data from response stream (consider to use buffered Read instead of ReadToEnd if your data size is large):
using (var dataStream = myWebResponse.GetResponseStream())
using (var reader = new StreamReader(dataStream))
{
string data = reader.ReadToEnd();
}
Concerning ContentLength equals to -1 in your case - well, it can be something at your server-side, check if your server actually returns this header. In fact, this header is not mandatory and you should not rely on it.

Error while adding WCF reference in the Windows Form Application Solution

Metadata contains a reference that cannot be resolved: 'http://192.168.1.86:8080/spectrum/restful/models'.
The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Basic realm="spectrum"'.
The remote server returned an error: (401) Unauthorized.
If the service is defined in the current solution, try building the solution and adding the service reference again.
enter image description here
Any help please !!

string res = string.Empty;
string url = "http://192.168.1.86:8080/spectrum/restful/models";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Credentials = CredentialCache.DefaultCredentials;
string authInfo = userName + ":" + password;
authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));
request.Headers["Authorization"] = "Basic " + authInfo;
HttpWebResponse response = null;
try
{
response = (HttpWebResponse)request.GetResponse();
Stream dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();
HttpStatusCode errorCode = response.StatusCode;
reader.Close();
dataStream.Close();
response.Close();
res = responseFromServer;
}
catch (Exception ex)
{
if (response == null && ex.Message.Contains("400"))
res = "NoSuchUser";
else
res = ex.Message;
}

getting 403 error in release version and work fine in debug version

I working in project that connect to appannie.com API and get result and it is working fine in debug but when I publish it and try to test it I get this page :
and here is the code used for this page in C#:
protected void Button1_Click(object sender, EventArgs e)
{
string url = "https://api.appannie.com/v1/accounts?page_index=0";
string id="",temp="";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.UseDefaultCredentials = true;
request.Proxy = WebProxy.GetDefaultProxy();
request.Credentials = new NetworkCredential("username", "password");
request.ContentType = "Accept: application/xml";
request.Proxy.Credentials = CredentialCache.DefaultCredentials;
request.Referer = "http://stackoverflow.com";
request.Headers.Add("Authorization", "bearer **************");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode == HttpStatusCode.OK)
{
Stream receiveStream = response.GetResponseStream();
// Pipes the stream to a higher level stream reader with the required encoding format.
StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);
temp = readStream.ReadToEnd();
//TextArea1.InnerText = temp + "\n";
string[] id_arr = temp.Split(',');
int count = 0;
while (count != id_arr.Length)
{
if (id_arr[count].Contains("account_id"))
{
id = id_arr[count];
count = id_arr.Length;
break;
}
count++;
}
id = id.Substring(id.IndexOf("account_id") + 13);
//TextArea1.InnerText += id;
//Console.Write(readStream.ReadToEnd());
//response.Close();
response = null;
//readStream.Close();
request = null;
string date = Calendar1.SelectedDate.ToString("yyyy-MM-dd");
string url2 = "https://api.appannie.com/v1/accounts/" + id + "/sales?break_down=application+date" +
"&start_date="+date+
"&end_date="+date+
"&currency=USD" +
"&countries=" +
"&page_index=0";
TextArea1.InnerText = url2;
request = (HttpWebRequest)WebRequest.Create(url2);
request.Proxy = WebProxy.GetDefaultProxy();
request.Proxy.Credentials = CredentialCache.DefaultCredentials;
request.Referer = "http://stackoverflow.com";
request.Headers.Add("Authorization", "bearer **************");
response = (HttpWebResponse)request.GetResponse();
receiveStream = response.GetResponseStream();
// Pipes the stream to a higher level stream reader with the required encoding format.
readStream = new StreamReader(receiveStream, Encoding.UTF8);
temp = "";
temp = readStream.ReadToEnd();
//TextArea1.InnerText = temp;
string[] id_arr2 = temp.Split(',');
int count2 = 0;
string down = "";
string update = "";
while (count2 != id_arr2.Length)
{
if (id_arr2[count2].Contains("downloads"))
{
down = id_arr2[count2];
count2 = id_arr2.Length;
break;
}
count2++;
}
count2 = 0;
while (count2 != id_arr2.Length)
{
if (id_arr2[count2].Contains("update"))
{
update = id_arr2[count2];
count2 = id_arr2.Length;
break;
}
count2++;
}
down = down.Substring(down.IndexOf("downloads") + 12);
update = update.Substring(update.IndexOf("update") + 9);
//TextArea1.InnerText = "downloads : "+down+ "----- update :" + update;
TextBox1.Text = down;
TextBox2.Text = update;
}
}

Once you publish it, one of the following is not taking effect:
Credentials
Proxy Settings.
Hence the remote api is giving back a 403. 2 ways to torubleshoot this further:
Run fiddler trace on the working request/response and compare it with the non-working request/response. Typically a good API has more details in the response body as to why it is a 403 error.. (token invalid, invalid credentials etc.)
You can also catch a WebException in code, and try to get the exception body if any. The same will also be visible in Fiddler.
<< code formatting refuses to work on my browser. please bear with unformatted code below >>
try
{
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
}
catch (WebException ex)
{
// breakpoint and see what this is.
string errorDetails = new StreamReader(ex.Response.GetResponseStream()).ReadToEnd();
}

HttpWebRequest: Unable to connect to the remote server

I develop client app which connects to the server and fetches different information from it. It is multithreaded app. When I start it with a few threads it works perfect.
Until it start throwing an exception with the following message:
"Unable to connect to the remote server"
I've used TCPView and cannot find anything about my client app. So when it starts returning "Unable to Connect" it doesn't even OPEN any http connections...
How can I figure out why it doesn't open connection?
Thanks,
EDIT:
Here is the code I'm using in Multiple threads to fecth page content:
HttpWebResponse response = null;
Stream resStream = null;
StreamReader reader = null;
string res = "";
try
{
HttpWebRequest request = (HttpWebRequest)
WebRequest.Create(requestUrl);
if (cookies_ == null)
{
cookies_ = new CookieContainer();
}
request.Timeout = timeoutVal_;
request.ReadWriteTimeout = timeoutVal_ * 2;
request.KeepAlive = false;
if (bUseCookies)
{
request.CookieContainer = cookies_;
}
// execute the request
response = (HttpWebResponse)
request.GetResponse();
resStream = response.GetResponseStream();
reader = new StreamReader(resStream);
res = reader.ReadToEnd();
}
catch (Exception ex)
{
throw new Exception(siteToken + " " + ex.Message);
}
finally
{
if (response != null)
response.Close();
if (resStream != null)
resStream.Close();
if (reader != null)
{
reader.Close();
}
}
return res;
After a couple minutes threads getting into cycle with Timeout Exception or Unable to connect to Server.
The strange thing that if I start Fiddler, connections get reactivated and threads continue working for some time. How does Fiddler fix that problem?

You may be connecting internet through a proxy check your IE lan settings. from c# you need to add proxy settings.
var request = (HttpWebRequest)WebRequest.CreateHttp(url);
WebProxy proxy = new WebProxy("http://127.0.0.1:8888", true);
proxy.Credentials = new NetworkCredential("user", "pwd", "ADomain");
request.Proxy = proxy;
request.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
request.Timeout = 1000 * 60 * 5;
request.Method = method;
request.Headers.Add("DAUTH", dauth);request.GetResponse();