PUT request with json content-type

Question

I have a switch based on $_SERVER['REQUEST_METHOD'] and something is going wrong in the PUT case. The plausible way to read PUT is to use php://input and read it with fopen or file_get_contents .

The data that gets sent to PUT is of Content-type: application/json

Currently, this is the case I have got:

case "PUT":
        parse_str(file_get_contents("php://input"), $putData);
        var_dump($putData);
        if(isset($_GET['id'])){
            putData($_GET['id'], $putData);
        } else {
            print json_encode(["message" => "Missing parameter `id`."]);
            http_response_code(400);
        }
        break;

The great thing is that my cURL request with key/value pairs work perfectly fine. The data gets filled and my putData() handles everything just fine. The problem is that I need to accept JSON in this case, how do I go about? My REST client throws an empty array when I var_dump($putData) .

Answer 1

Try using json_decode instead of parse_str

case "PUT":
        $rawInput = file_get_contents("php://input");
        $putData = json_decode($rawInput);
        if (is_null($putData)) {
            http_response_code(400);
            print json_encode(["message" => "Couldn't decode submission", "invalid_json_input" => $rawInput]);
        } else {
            if(isset($_GET['id'])){
                putData($_GET['id'], $putData);
            } else {
                http_response_code(400);
                print json_encode(["message" => "Missing parameter `id`."]);
            }
        }
        break;

Answer 2

Just guessing here, but if your REST client accepts JSON for this request, it will choke on var_dump() which outputs a string which isn't JSON right back onto the response. Try removing var_dump()

Also, I'm pretty sure you must call http_response_code() before any output is sent to the client.