I've a simple question, for you, that I just can't seem to get my head around.
The situation is the following:
We create and send a request to a web service, using WSE 3.
The web service is written in Java.
Most of the things are fine, but I can't seem to have an impact on the ContentType of either the WebResuest or WebResponse and that's causing some problems.
The errormessage I keep getting is the following:
Client found a response content type of ' application/xop+xml;type="text/xml; charset=utf-8" ' but expected 'text/xml'.
The request failed with the error message: ....
In the details of the error message it has the response to our call from the server and it's coming through properly.
Obviously it's not good as it is at the moment as it's coming through an exception :).
So, how could I set the expected content type for the response?
If I'm correct, the Request and the Response in WSE 3.0 has to have the same ContentType. So I thought I would try to set the request.Headers[HttpRequestHeader.ContentType] to the expected one, but with no luck. (also, I can set the HttpWebRequest's contenttype in quite a few places, but none of them seem to do the trick)
This has been solved luckily, so here's the solution for future reference:
Our client inherits from the WebServicesClientProtocol class, in which there's a method called GetWebResponse(..).
Simply overriding that method and changing the ContentType of the Response seemed to work out for us.
protected override WebResponse GetWebResponse(System.Net.WebRequest request)
{
WebResponse response = base.GetWebResponse(request);
response.Headers[HttpResponseHeader.ContentType] = "text/xml";
return response;
}
Related
I'm trying to reuse my HttpClient instance, as that's best practice. Therefore, in one particular request, I want to set the Authorization header on the request, instead of setting it globally on the client. From everything I've read, this ought to work:
var request = new HttpRequestMessage(HttpMethod.Get, url);
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
var response = await _client.SendAsync(request);
This compiles, but then throws when I attempt to call it. The exception I get is:
"Misused header name. Make sure request headers are used with
HttpRequestMessage, response headers with HttpResponseMessage, and
content headers with HttpContent objects."
I'm confused why I'm allowed to set this value on the request message if it's just going to throw, and I also haven't figured out a workaround.
I've tried directly adding the header using TryAddWithoutValidation but I still get the same exception (not even a return of false like I'd expect!)
I'm suspecting this might be a bug in the framework since multiple people have posted this exact code with no apparent problems, but would be interested in any insights/workarounds.
Turns out that due to a different bug, the value of "token" was null. I would recommend checking this first if you're having this issue: note that the error message was 100% a lie.
I want to call an endpoint with a Put command.
In Postman
I can put example https://example.com/customers/106. I then add a body of type application/json (under raw).
When I Put this body to the endpoint, I get a 200 OK.
The endpoint I use requires two custom headers and a content-type, which I have made under headers. So I add three headers: X-AppSecretToken, X-AgreementGrantToken and the Content-Type (to application/json).
In RestSharp
Here I use the following. The putstr is the exact same body I Put as I do in Postman:
var restclient = new RestSharp.RestClient("https://example.com");
var request = new RestRequest("/customers/" + customerId, Method.PUT);
request.AddHeader("X-AppSecretToken", systemToken);
request.AddHeader("X-AgreementGrantToken", userToken);
request.AddHeader("Accept", "application/json");
request.AddJsonBody(putstr);
var response = restclient.Execute(request);
Now, when I do this, I get the following response which is a custom error from the API I am calling:
"{\"message\":\"Error converting value SOME STUFF}}\\\" to type 'eco.rest.Models.Customer'. Path '', line 1, position 605.\",\"errorCode\":\"E00500\",\"developerHint\":\"The JSON payload could not be parsed. The error message should give you a good indication of where the error is located. One common reason for this error is a missing '{' or a '}' in your payload.\",\"logId\":\"123fc6fb4964a141f612ae8ae7571446\",\"httpStatusCode\":400,\"logTime\":\"2018-05-20T21:56:56\"}"
How to fix?
Normally, I'd never ask this question. If someone else asked, I would say: open Fiddler or a similar tool and see how requests are different.
I have some troubles with this, because it's HTTPS.
When I debug through my code, I simply don't see the call inside Fiddler. I also installed Charles, but also no luck. Not sure what the problem is.
However, I thought that someone who reads this can probably come up with the problem. My own assumptions are I maybe have added the headers in a wrong way, the JSON body is encoded different or similar - but I am really unsure how to move on. I hope someone can help!
Your putstr value seems to be a JSON value.
AddJsonBody will convert this JSON value into another JSON value.
You should use the original object instead of putstr.
It seems to be occurring only one machine and none of the other machines.
HttpWebRequest myRequest =(HttpWebRequest)WebRequest.Create("https://connect.zystemsgo.com/auto/");
myRequest.Method = "GET";
SetCertificatePolicy();
Application.DoEvents();
WebResponse myResponse = myRequest.GetResponse();
StreamReader sr = new StreamReader(myResponse.GetResponseStream(),System.Text.Encoding.UTF8);
string result = sr.ReadToEnd();
I tried searching other 400 request errors, but it is not clear. How do I go about debugging this?
HTTP Error 400 means Bad Request. This is being returned by the server.
Usually, when I'm debugging HTTP requests, I use Fiddler to monitor the requests and responses and find out what's going on. It never fails.
(Not really an answer, but too big for comment)
For what it's worth, I ran the following Python code (too lazy to spin up C# :), and it worked fine:
import httplib
conn = httplib.HTTPSConnection('connect.zystemsgo.com')
conn.request('GET', '/auto/')
resp = conn.getresponse()
data = resp.read()
print data # expected ouput, just like visiting in a browser
print resp.status # 200
Are you sure you are showing us the URL that is actually failing, or is your code a more general example?
Perhaps the server certificate is not installed on that machine? I wouldn't expect a HTTP 400 in that case, but it's the only thing I can think of so far...
it is a bad request error .Are there no parameters in the request?
Can you post the response message,it will give some idea of what is going wrong.
The code that i supplied in the comment above works.
WebClient webClient = new WebClient();
webClient.DownloadFile("Your complete url for the file", #"c:\myfile.txt");
you need to have permission to write in the directory of your choice.
You could also try and use the async download if you want.I am not getting why it would not work on a certain machine.
I am using a web service reference in my .net 3.0 app and I'm trying to set up gzip decoding.
When I use SoapUI the responses are compressed with gzip because the the header 'Accept-Encoding: gzip,deflate' is set in the request. When my .net request is sent it does not have this header so the server is not compressing the response.
I found this link which describes exactly what I want to do. I implemented the code and verified with the debugger that it was being executed on every request, but it is still not adding the 'Accept-Encoding:gzip' header.
Next I added the header manually in the class from the link.
httpWebRequest.Headers.Add("Accept-Encoding", "gzip");
Finally I received a compressed response from the server! But no, now I get an malformed xml exception which I'm pretty sure is because the response is not being decompressed even though the following is set by using the class from the link.
httpWebRequest.AutomaticDecompression = DecompressionMethods.GZip;;
I cannot understand what is going wrong.
Ok I figured out a solution to my problem.
Since I am using a web reference you have to set EnableDecompression = true on the web reference object.
So the solution is something like this
var client = new ReferredService
{
EnableDecompression = true
}
where ReferredService is the web reference name.
I have a C# console app (.NET 2.0 framework) that does an HTTP post using the following code:
StringBuilder postData = new StringBuilder(100);
postData.Append("post.php?");
postData.Append("Key1=");
postData.Append(val1);
postData.Append("&Key2=");
postData.Append(val2);
byte[] dataArray = Encoding.UTF8.GetBytes(postData.ToString());
HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create("http://example.com/");
httpRequest.Method = "POST";
httpRequest.ContentType = "application/x-www-form-urlencoded";
httpRequest.ContentLength = dataArray.Length;
Stream requestStream = httpRequest.GetRequestStream();
requestStream.Write(dataArray, 0, dataArray.Length);
requestStream.Flush();
requestStream.Close();
HttpWebResponse webResponse = (HttpWebResponse)httpRequest.GetResponse();
if (httpRequest.HaveResponse == true) {
Stream responseStream = webResponse.GetResponseStream();
StreamReader responseReader = new System.IO.StreamReader(responseStream, Encoding.UTF8);
String responseString = responseReader.ReadToEnd();
}
The outputs from this are:
webResponse.ContentLength = -1
webResponse.ContentType = text/html
webResponse.ContentEncoding is blank
The responseString is HTML with a title and body.
However, if I post the same URL into a browser (http://example.com/post.php?Key1=some_value&Key2=some_other_value), I get a small XML snippet like:
<?xml version="1.0" ?>
<RESPONSE RESULT="SUCCESS"/>
with none of the same HTML as in the application. Why are the responses so different? I need to parse the returned result which I am not getting in the HTML. Do I have to change how I do the post in the application? I don't have control over the server side code that accepts the post.
If you are indeed supposed to use the POST HTTP method, you have a couple things wrong. First, this line:
postData.Append("post.php?");
is incorrect. You want to post to post.php, you don't want post the value "post.php?" to the page. Just remove this line entirely.
This piece:
... WebRequest.Create("http://example.com/");
needs post.php added to it, so...
... WebRequest.Create("http://example.com/post.php");
Again this is assuming you are actually supposed to be POSTing to the specified page instead of GETing. If you are supposed to be using GET, then the other answers already supplied apply.
You'll want to get an HTTP sniffer tool like Fiddler and compare the headers that are being sent from your app to the ones being sent by the browser. There will be something different that is causing the server to return a different response. When you tweak your app to send the same thing browser is sending you should get the same response. (It could be user-agent, cookies, anything, but something is surely different.)
I've seen this in the past.
When you run from a browser, the "User-Agent" in the header is "Mozilla ...".
When you run from a program, it's different and generally specific to the language used.
I think you need to use a GET request, instead of POST. If the url you're using has querystring values (like ?Key1=some_value&Key2=some_other_value) then it's expecting a GET. Instead of adding post values to your webrequest, just put this data in the querystring.
HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create("http://example.com/?val1=" + val1 + "&val2=" + val2);
httpRequest.Method = "GET";
httpRequest.ContentType = "application/x-www-form-urlencoded";
....
So, the result you're getting is different when you POST the data from your app because the server-side code has a different output when it can't read the data it's expecting in the querystring.
In your code you a specify the POST method which sends the data to the PHP file without putting the data in the web address. When you put the information in the address bar, that is not the POST method, that is the GET method. The name may be confusing, but GET just means that the data is being sent to the PHP file through the web address, instead of behind the scenes, not that it is supposed to get any information. When you put the address in the browser it is using a GET.
Create a simple html form and specify POST as the method and your url as the action. You will see that the information is sent without appearing in the address bar.
Then do the same thing but specify GET. You will see the information you sent in the address bar.
I believe the problem has something to do with the way your headers are set up for the WebRequest.
I have seen strange cases where attempting to simulate a browser by changing headers in the request makes a difference to the server.
The short answer is that your console application is not a web browser and the web server of example.com is expecting to interact with a browser.
You might also consider changing the ContentType to be "multipart/form-data".
What I find odd is that you are essentially posting nothing. The work is being done by the query string. Therefore, you probably should be using a GET instead of a POST.
Is the form expecting a cookie? That is another possible reason why it works in the browser and not from the console app.