Why Does Removing \'charset=utf8\' from \'Content-Type\' Fix HTTP 415 \'Unsupported Media Type\' Error When Sending JSON Requests?

HTTP 415 Unsupported Media Type Error When Sending JSON Requests

When attempting to execute a REST service with a JSON request, a user encountered an HTTP 415 "Unsupported Media Type" error. Despite setting the request content type to "application/json; charset=utf8," it only worked when no JSON object was included in the request.

Using the google-gson-2.2.4 library and experimenting with different JSON libraries proved ineffective.

The following code snippet illustrates the implementation:

<code class="java">// Code snippet removed for brevity</code>

Examining the value of requestJson.toString(), which represented the JSON body:

<code class="json">{"type":"arl","action":"remove","domain":"staging","objects":"http://www.example.com"}</code>

Solution:

Curiously, removing "charset=utf8" from the "Content-Type" request property ("Content-Type", "application/json; charset=utf8") miraculously resolved the issue.

<code class="java">// Removed "charset=utf8" from "Content-Type"
con.setRequestProperty("Content-Type", "application/json");
// Code snippet continues removed for brevity</code>

The exact reason for this alteration is still unknown, but it effectively allowed JSON requests to be sent and processed successfully.

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