I have a few web services up and running fine on my localhost. The problem is when I try requesting a response from it, the following error comes up when debugging:
Web Exception was unhandled by user code
The remote server returned an error: (500) Internal Server Error
The piece of my code where it throws this error is at the HttpWebResponse header:
using (HttpWebResponse httpResponse = httpRequest.GetResponse() as HttpWebResponse)
{
Encoding enc = Encoding.GetEncoding(1252);
using (StreamReader responseStream = new StreamReader(httpResponse.GetResponseStream(), enc))
{
bl = responseStream.ReadToEnd();
}
}
Any tips? I'm sort of new to this...much appreciated.
The 500 error means something went wrong in the server side.
If you also wrote the web services, that's the code you have to inspect and debug.
Related
I used the following code to call a web service written in C# and hosted in IIS, but it returns an error
Remote server returned an error: (405) Method not enabled
But when I use Postman with the same input info, it works fine.
var httpWebRequest = (HttpWebRequest)WebRequest.Create(url_to_post);
httpWebRequest.Method = "POST";
httpWebRequest.ContentType = "application/json; charset=utf-8";
httpWebRequest.KeepAlive = true;
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
streamWriter.Write(json_object);
streamWriter.Flush();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
// return result;
}
First of all, please capture the request fiddler and check its response server.
We need to figure out where the 405 come from. If the response server is HTTP API/2.0 then it must come from http.sys. You may need to check your request URL.
However, if the response server is IIS. Then please enable failed request tracing.
Most of time, IIS will return 405 error because either IIS use the wrong handler or your correct handler didn't allow POST method.
So please enable failed request tracing and check what module/handler is returning 405 error.
https://learn.microsoft.com/en-us/iis/troubleshoot/using-failed-request-tracing/troubleshooting-failed-requests-using-tracing-in-iis
Please ensure WebDAV handler is not handling the request. And Static content feature has been installed. You need to ensure correct handler is handling the request and the handler also allow the POST method.
I'm making an app in unity and I need to download a file.
I'm using the following code to get header values:
HttpWebRequest request = (HttpWebRequest)System.Net.WebRequest.Create(remoteFile);
request.Method = "HEAD";
HttpWebResponse resp = null;
try {
resp = request.GetResponse() as HttpWebResponse;
}catch (System.Exception e) {
Debug.LogWarning("ERROR: " + e);
return;
}
This code worked for some files, but I'm hosting a file on ge.tt, and it doesn't work on it.
The link I gave it starts the download immediately in chrome.
The error is:
ERROR: System.Net.WebException: The remote server returned an error: (404) Not Found.
at System.Net.HttpWebRequest.CheckFinalStatus (System.Net.WebAsyncResult result)
Does anyone know why is this happening?
Thank you!
The link was https, and when I changed it to http it game me an authentication error, so I followd this link and fixed it.
I'm trying to understand something about exception handling with a HttpWebRequest.
I have a client library and it's making a request to a WebAPI controller;
HttpWebRequest r = (HttpWebRequest)WebRequest.Create(url);
r.Method = "POST";
r.ContentType = "application/json";
foreach (var header in request.Headers)
{
r.Headers.Add(header.Key, header.Value.ToString());
}
r.ContentLength = request.RequestBody.Length;
using (StreamWriter writer = new StreamWriter(r.GetRequestStream()))
writer.Write(request.RequestBody);
I know the request will throw an exception, and contain the message entity already exists - 1234.
When I get the response;
using (HttpWebResponse response = (HttpWebResponse)r.GetResponse())
{
if (response.StatusCode == HttpStatusCode.OK)
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
return reader.ReadToEnd();
return "Invalid";
}
I get a WebException thrown. So, the caller of the request has a try..catch in it. And I get the WebException. What I get is a protocol error, not the 500 internal server error that was thrown (using correct status codes to represent the message comes later). Now if I read the Response of the WebException, it does contain my message and the stacktrace.
Questions
Why do I not get a status code of 500 in my response, why does it throw a protocol error?
Is there a more correct way of handling the request?
I have searched around and found some people getting this issue when not using the correct headers etc. But as far as I can tell, I have added all the headers that I can and still get the same behavior.
An 500 internal server error usually means that the API received the request but threw an unhandled exception while processing it, thus the "Internal Server Error".
You may log to a database or file all your API's unhandled exceptions to help your debugging process. Good luck.
It works fine to browse this page : http://www.litteraturmagazinet.se/arga-bibliotekstanten/boklogg/favorit-i-repris-9560835 in a regular browser(for example Chrome).
But when I use the following code to fetch the website I get Internal Server Error (500)?
This is the code I use (and it works great on all other webpages I have tried) :
HttpWebRequest request;
WebResponse webresponse;
request = (HttpWebRequest)HttpWebRequest.Create(url);
webresponse = (HttpWebResponse)request.GetResponse();
The exception is thrown in GetResponse.
I have found for example this : HttpWebRequest.GetResponse() returns error 500 Internal Server Error, but I do not understand it? Why does not request.GetResponse work with this specific webpage? And How do I know what to put in the header(It would be great if it dident hade to be updated later on to diffrent versions)?
I tried your url with wfetch with no headers and i get a 500 as well.
you have to set a proper user-agent in the headers of your request.
HttpWebRequest myHttpWebRequest=(HttpWebRequest)WebRequest.Create("http://www.contoso.com");
myHttpWebRequest.UserAgent=".NET Framework Test Client";
I have created my own silverlight API to get/set data from/to MailChimp.
It was working fine, but today I am getting an error. Example code is :
string MailChimpURL = "https://us2.api.mailchimp.com/1.3/?method=lists&apikey=my_api_key-us2";
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(new Uri(MailChimpURL));
request.BeginGetResponse(new AsyncCallback(ReadCallback), request);
private void ReadCallback(IAsyncResult asynchronousResult)
{
HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
using (StreamReader streamReader1 = new StreamReader(response.GetResponseStream()))
{
string resultString = streamReader1.ReadToEnd();
}
}
This works fine with http but gives error when using https.
The error which https is for yesterday. Months back it was working fine for both http and https. Now its only working for http.
Is this a problem in my code or this from MailChimp.
I don't think you are showing us the true exception. The exception you are seeing when inspecting the AsyncWaitHandle property you will always get when debugging because Siverlight does not support that property.
You really need to place some error handling in your ReadCallBack so you can report back to the UI in a friendly way anything that may have gone wrong.