I got a response on browser but postman doesn't.
Hardware Engineer create web server on the device and I was supposed to get 'ok' response when I access that with address like 192.168.4.1:8080
When I try that on chrome browser, I got ok and status 200 response. But when I do the same thing on postman, I don't get any response.
So, I used wireshark and it recognized there was the response packet like below.
HTTP1.1 200 OK
server: ~~
Content-Type:text/html
Connection:close
Content-Length:ld
I don't know why postman couldn't get any response. I've tried change settings like SSL certificate off, timeout 0, proxy off things. but it doesn't work.
Actually the thing that I want to do eventually is upload a file from mobile phone to the device and getting response for success callback.
It works on android, but not ios.
I think there are something in common android and browser, but ios and postman.
it turns out that response's wrong header was the problem.
After changing content-lenght from ld to number at the server side, it does work well even on the postman and ios.
I don't know why it was ok with chrome though.
Thanks.
Related
I'm using PolarProxy for decrypting HTTPS requests.
When I look at intercepted response from Recaptcha, I see pretty strange payload
enter image description here
It is HTTP2 protocol.
As you can see, cookies are the same, it means we a looking at the same requests, but response in Wireshark is completely different from response in browser. Why?
Does anyone know how to intercept that response from Recaptcha?
I want to do it in C++ (libpcap) in future, but first I want to do it manually.
Using Postman, when I make a PUT request to an endpoint which returns a 204 with content, Postman is unable to parse the response, and my collection runner stops that iteration, indicating that an error has occurred.
When run outside of the runner, Postman displays the following:
Other people have also had this problem
Unfortunately I cannot fix the non-standard endpoint. Is there a workaround that will let Postman continue without throwing an error, especially when using the collection runner?
The 204 (204 NO CONTENT) response from the server means that the server processed your request successfully and a response is not needed.
More here: https://httpstatuses.com/204
Actually as much as I know, if the server is sending a 204 with a payload response, the endpoint is not developed as it should.
This would be the main reason Postman is not showing a response payload. You will only be able to read response headers.
So if you send a PUT request, and only receive headers, it means everything is ok. If you spect data the server should be responding with a 200 code.
Now, said this, if postman is telling you that “it could not get any response” it means basically the server is not responding any thing. Now try to increase the timeout in the postman settings. It’s very probable that the server is taking to much time. Check outside the runner how much time it’s taking to response.
I hope this helps you.
I'm working on an browser extension that authenticates with a remote server via XMLHttpRequests. In Firefox (59.0.2) I have the problem that the session cookie send by the server is not stored in the browser. When looking at the network traffic I get a Set-Cookie response from the server for every request:
Set-Cookie JSESSIONID=node01abks2u96hf84wt0i1uqwsb9879.node0;Path=/
but it seems that the cookie is never accepted or stored in the extension.
When looking at Chrome (where the extension is working) my extension includes this cookie in the request:
Cookie: io=jCX1X9rlaOhCqE0nAAAB JSESSIONID=node01abks2u96hf84wt0i1uqwsb9879.node0
However, this is not the case in Firefox. Why is Firefox is not including the cookie in the request? and why is it not storing the cookie?
UPDATE: as suggested I filed a bug report:
https://bugzilla.mozilla.org/show_bug.cgi?id=1454806
Furthermore, I created a very minimal example addon that fails:
https://gitlab.com/czeidler/firefox-cookie-problem
Could somebody please let me know if that addon really should work? or am I doing something wrong? To trigger the problem open the debug view of the addon and select the network view. Then click the addon popup icon. This will trigger two requests to my server. The first reply contains a Set-Cookie header that is not reused in the second request.
I found the reason why it is not working. Firefox handles a request from the popup as a cross domain request and does not set the cookie for this reason. Not sure if Chrome and Firefox should behave the same here or which approach is the better one. Here is how I fixed this issue to make it work in both browsers:
On the server:
response.addHeader("Access-Control-Allow-Origin", request.getHeader("Origin"))
response.addHeader("Access-Control-Allow-Credentials", "true")
In the popup:
connection.withCredentials = true;
When I send a http request using a wrong server address like 127.0.0.1 as the server address of a URL, the libcurl returns CURLE_OK and get me the http code 0. However, I get http code 404 when I send the same request with IE. Does anyone know how can I get an error code rather than 0 with libcurl when sending request like that.
libcurl returns CURLE_OK when the transfer went fine. Getting a 404 from a HTTP server is considered a fine transfer. You can make >=4xx HTTP response codes cause a libcurl error by setting the CURLOPT_FAILONERROR option.
Alternatively, and this may be the nicer way, you extract the HTTP response code after the transfer, with for example curl_easy_getinfo() to figure out the HTTP response code to see what the HTTP server thought about the resource you requested.
Try using it to visit a site that's actually running a web server, and try to retrieve a file that doesn't exist. For example, http://www.google.com/404. Your browser is almost certainly not actually getting a 404 from visiting 127.0.0.1, even if it's telling you that's what it got.
I have a VB.NET app that sends a POST request to a script on my server that is running Cloudflare. I always get an error when sending the request from the app, however using a Firefox extension to simulate the request works fine. With the use of Fiddler I think I have found the cause of the problem:
When sending the request with the Firefox addon an extra header is attached to the request:
Cookie: __cfduidxxxxxxxxxxxx
This cookie is from Cloudflare, but where does it come from, ie. how can I get this cookie value and send it with my requests from the VB app? I tried copying and pasting the cookie into the app and it worked fine, so this leads me to conclude that I need this cookie, however this value is unique for each user so I cannot simply hardcode it into the app.
Quick side-note: Not sure if this helps, but if I send a GET request from the VB app it works fine without the __cfduid cookie.
Look for a Set-Cookie header coming back from the server on it's response. It will expect to get that value back on subsequent requests in a Cookie: header. This value is usually an opaque string that is classified by a path, although not always.