I have an ASP.NET WebForms app (sender) which sends a WebClient post request to another ASP.NET app (receiver) on the same dev machine. The WebClient post is initiated by clicking a button in the sender app. It's a test app and the form has only the button. I can see the post from the button in Fiddler but I don't see the post request from the WebClient method. Why?
I know the WebClient post runs successfully because the breakpoint is hit in the receiver app and the Forms collection has the value of the input field from the WebClient request from the sender app. (Using Windows 8.1)
Update This is the call:
using (var client = new WebClient())
{
client.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
var data = "FirstName=John";
var result = client.UploadString("http://localhost/testform/default.aspx", "POST", data);
Console.WriteLine(result);
}
.NET and IE(before version 9) are not sending requests to localhost through any proxies. There are 3 possible solutions:
Use machine name or hostname: http://<machine name>/testform/default.aspx
Add ipv4.fiddler to the URL: http://localhost.fiddler/testform/default.aspx
Add custom rule to the fiddler:
static function OnBeforeRequest(oSession:Fiddler.Session){
if (oSession.HostnameIs("MYAPP")) {
oSession.host = "<put your ip address and port here>";
}
}
Then you should be able to capture traffic through http://myapp/testform/default.aspx
Reference Problem: Traffic sent to http://localhost or http://127.0.0.1 is not captured.
Could be multiple things. Here are some possibilities
You have Fiddler set to filter to only show things from a particular process (or some other type of filter but process is the easiest one to accidentally turn on)
You have not turned on HTTPS capture in Fiddler but this missing request is HTTPS (it's off by default)
Your WebClient has a custom proxy configured and isn't pulling the default settings from IE
Related
I'm trying to connect to our wordpress api in our asp.net mvc application, using the following code
public static string GetLifespeakBlogListings()
{
WebClient client = new WebClient();
string url = "https://lifespeak.com/wp-json/wp/v2/posts?categories=6";
string listings = client.DownloadString(url);
return listings;
}
however I'm getting the following exception :
System.Security.SecurityException Failed to negotiate HTTPS connection with server.fiddler.network.https> HTTPS handshake to lifespeak.com (for #1) failed. System.IO.IOException Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
If I access this feed from a browser, it works fine https://lifespeak.com/wp-json/wp/v2/posts?categories=6
However, if I try from fiddler, I get the same exception:
I'm assuming that something on our wordpress site is blocking this request for some reason. Is there something I can configure to prevent this? How can I determine the cause?
The issue was that the version of System.Net I was using in my application was attempting to make the request to the wordpress API using TLS 1.0, and was getting rejected, similar to the issue with fiddler that dave pointed out above. I fixed this by adding the following line of code in the method, as specified in How to specify SSL protocol to use for WebClient class
ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
Note that the value has to be added manually and cast as a SecurityProtocolType, as .net 4.0 (the version I was using) doesn't support tls1.2
I have username and password to login a web site but i need login with proxy
how can change username and pass to proxy
i can login to web site with this url www.mydomain.com?user=1&pass=2 or insert user and pass to login page
how i can login web site with HttpWebRequest in asp.net C#?
<code>
Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
HttpWebRequest Request = (HttpWebRequest)HttpWebRequest.Create(Url);
HttpWebResponse Response = (HttpWebResponse)Request.GetResponse();
</code>
It is well documented on MSDN, see HttpWebRequest.Proxy Property.
The local computer or application config file may specify that a
default proxy be used. If the Proxy property is specified, then the
proxy settings from the Proxy property override the local computer or
application config file and the HttpWebRequest instance will use the
proxy settings specified. If no proxy is specified in a config
file and the Proxy property is unspecified, the HttpWebRequest
class uses the proxy settings inherited from Internet Explorer on the
local computer. If there are no proxy settings in Internet Explorer,
the request is sent directly to the server.
There is also longer sample code, the most important part is:
WebProxy myProxy = new WebProxy();
myProxy.Address = "your proxy url";
myProxy.Credentials = new NetworkCredential("login", "password");
Request.Proxy = myProxy;
I have a Spring MVC controller that makes a json RESTful webservice call using apache DefaultHttpClient. I wanted to view the http request/response data of that webservice call, I've tried firebug, wireshark, fiddler, but had no success.
they do show the traffic when I'm using a browser.
below is the jist of the webservice call
System.getProperties().put("http.proxyHost", "localhost");
System.getProperties().put("http.proxyPort", "8888"); // set proxy to fiddler
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost(targetUrl);
// sample targetUrl = "http://localhost:9080/SampleBackend/sample-backend-json.jsp"
StringEntity input = new StringEntity("{\"qty\":100,\"name\":\"iPad 4\"}");
input.setContentType("application/json");
postRequest.setEntity(input);
HttpResponse response2 = httpClient.execute(postRequest);
You must run the packet capture (tcpdump most likely) on the loopback interface of the server. You can then download the captured data and view it in wireshark, same as a live capture.
We have a Flex client and a server that is using the Spring/Blazeds project.
After the user logs in and is authenticated, the spring security layer sends a redirect to a new URL which is where our main application is located.
However, within the flex client, I'm currently using HTTPService for the initial request and I get the redirected page sent back to me in its entirety.
How can I just get the URL so that I can use navigatetourl to get where the app to go where it needs to?
Any help would greatly be appreciated. Thanks!
One solution would be to include a token inside a comment block on the returned page, for instance:
<!-- redirectPage="http://localhost/new-location" -->
then check for it's presence inside the HTTPService result handler. The token's value could then be used in your call to navigateToURL.
Another solution would be to examine the HTTP response headers and extract the value of the "Location" header using ActionScript. Consider using the AS3 HTTP Client lib.
From the examples page http://code.google.com/p/as3httpclientlib/wiki/Examples To determine the 'Location' header from the response:
var client:HttpClient = new HttpClient();
var uri:URI = new URI("http://localhost/j_security_check");
client.listener.onStatus = function(event:HttpStatusEvent):void {
var response:HttpResponse = event.response;
// Headers are case insensitive
var redirectLocation:String = response.header.getValue("Location");
// call navigateToURL with redirectLocation
// ...
};
// include username and password in the request
client.post(uri);
NOTE: AS3 HTTP Client depends on AS3 Core and AS3 Crypto libs.
You can also simply use the URLLoader class, no need for external code. One of the events it dispatches is HTTPStatusEvent.HTTP_RESPONSE_STATUS. Just plug into that and retrieve the redirected url:
urlLoader.addEventListener(HTTPStatusEvent.HTTP_RESPONSE_STATUS, onHTTPResponseStatus);
private function onHTTPResponseStatus(event:HTTPStatusEvent):void
{
var responseURL:String = event.responseURL;
}
I am (successfully) using this code right now, so if it doesn't work for some reason, let me know.
I've got a problem here.
I've got an ASP.net website hosting a silverlight 2 application.
I'd like the site to communicate to and fro from the silverlight app, and I'm doing this via http requests. Incidentally, if anyone knows a better way, please do tell me.
My server's got the following http listener set up. I copied this from a tutorial site somewhere, since it's mainly experimentation at the moment :
HttpListener listener = new HttpListener ( );
listener.Prefixes.Add("http://localhost:4531/MyApp/");
listener.Start( );
// Wait for a client request:
HttpListenerContext context = listener.GetContext( );
// Respond to the request:
string msg = "You asked for: " + context.Request.RawUrl;
context.Response.ContentLength64 = Encoding.UTF8.GetByteCount (msg);
context.Response.StatusCode = (int) HttpStatusCode.OK;
using (Stream s = context.Response.OutputStream)
using (StreamWriter writer = new StreamWriter (s))
writer.Write (msg);
listener.Stop( );
I'm using the following code to send a request :
private void MyButton_Click(object sender, RoutedEventArgs e)
{
Button b = sender as Button;
b.Content = "Hello World";
Uri serviceUri = new Uri("http://localhost:4531/MyApp/");
WebClient downloader = new WebClient();
downloader.DownloadStringCompleted += new DownloadStringCompletedEventHandler(TestDownloadStoriesCompleted);
downloader.DownloadStringAsync(serviceUri);
}
void TestDownloadStoriesCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
TextBox1.Text = e.Result;
}
}
My problem is that I can connect to the webserver from a console application using pretty much the same code (I tested it by setting a breakpoint in the code), however nothing happens when I click the button in silverlight. (I've added the "Hello World" to test that I am indeed connecting the delegate to the button.)
I've read that silverlight needs policies to connect via webclient, but it shouldn't be the case if I'm using the same server and the same domain for both the server and the silverlight application!
Thanks for all your replies!
EDIT : I am recieving this exception :
System.Security.SecurityException ---> System.Security.SecurityException: Security error.
Also, based on what I'm reading apparently to be site-of-origin, the deployment URI of the xap and the request URI must also be of the same port.
However, when I set the properties for the server to be hosted on a specific port, and I set the listener to listen to that same port, it fails with the message that The process cannot access the file because it is being used by another process. I assume it is because the http listener can't listen to the same port being used to host it :|
But then how can I make Silverlight perform host of origin webclient requests?
Since this is only a test add an "else TextBox1.Text=e.Error.ToString();" in your TestDownloadStoriesCompleted handler to see what error you get.
EDIT:
You can't host both the asp.net app and your listener on the same port - you could fix this by using a different port and serving a clientaccesspolicy.xml from your httplistener.
However I think it would make more sense for you to take a look at WCF web services (you add the svc to your asp.net app). Here's a sample.
you can use tools like http://www.fiddler2.com/fiddler2/
to actually see what is going on during the request....
This can give some help for further debugging...
I am now using HTTP handlers for communication. It seems that they will work fine enough for my purpose, although I still want to try out some WCF.