Search code examples
javahttp-postokhttp

Invalid "Content-Type" from Java code but works in Postman

I am trying to send a POST request to a particular URL, below is my Java Code to do it...

            OkHttpClient httpClient = new OkHttpClient().newBuilder().build();
            
            MediaType JSON = MediaType.parse("application/json; charset=utf-8");
            
            RequestBody body = RequestBody.create("<JSON_AS_STRING>", JSON);
            
            Request request = new Request.Builder()
              .url(url)
              .method("POST", body)
              .addHeader("Authorization", getToken())
              .addHeader("Content-Type", "application/json; charset=utf-8")
              .build();

            Response response = httpClient.newCall(request).execute()

When the request is excuted I am getting "Invalid content type" under error code 100. I am storing the JSON Body in a string and using it and defining media type to create a body.

But when I send same request from Postman, I am getting success code 204.

In Postman I have selected body as JSON and passing the JSON in the body and setting the URL and other headers like authorization and when I am sending the request I am getting 204.

enter image description here

But when I change it to text, then I get same error "Invalid content type" which I am getting from my Java code. I am using OkHttp3 library for client, request and response. How is my java code not taking media type as application/json. I even tried to pass "charset=utf-8" in header with application/json, still not working.

Any suggestions what could be going wrong, this is not the first time I am creating an okhttp3 request but first time seeing something like this...

Also I even tried to copy the java code snipped which you can create using postman...still not working.

Solution

  • I found the problem, when you set MediaType, then "charset=utf-8" was getting added which was leading to the error that I mentioned. So I removed the "charset=utf-8" manually and tried to send the request, this time I was using fiddler to listen to request sent from eclipse, turns out, whether you pass that charset or not, the MediaType will append it, so I tried to set the second parameter on MediaType.parse() as null, and just passed the header with Content Type as application/json, and it worked like a charm.