IBM Watson Text To Speech PHP API 问题：无法解码 JSON 对象

Question

My current PHP code does not seem to work for the IBM Watson Text To Speech.

The below code returns the following output:

{
   "code_description": "Bad Request", 
   "code": 400, 
   "error": "No JSON object could be decoded"
}"

I have been adding and removing several cURL options, to get it to work, but it still returns the aforementioned error.

<?php

$data="Hello World";

$ch = curl_init();

curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_URL,"https://stream.watsonplatform.net/text-to-speech/api/v1/synthesize");
curl_setopt($ch, CURLOPT_USERPWD, "$USERNAME:$password");
curl_setopt($ch, CURLOPT_SAFE_UPLOAD, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_HEADER, TRUE);
curl_setopt($ch, CURLINFO_HEADER_OUT, TRUE);
curl_setopt($ch, CURLOPT_HTTPHEADER,
    array(
        "Content-Type: application/json",
        "Accept: audio/webm"
    )
);

$server_output = curl_exec($ch);

$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);

$info = curl_getinfo($ch);

curl_close ($ch);

Which header am I supposed to add/remove to get it to work?

Answer 1

@blade19899

change this line:

From: curl_setopt($ch, CURLOPT_USERPWD, "$USERNAME:$password");

To: curl_setopt($ch, CURLOPT_USERPWD, base64_encode("$USERNAME:$password"));

For security reasons a base64 string is expected in authorization header. Hope this helps you.

Answer 2

Since this is the only question found by google for this common problem ... please have in mind that instead of the CURLOPT_USERPWD (which is quite fine for watson without any base64_encode in most cases), the problem here is quit simple and the reply states everything needed: "No JSON object could be decoded"

$data="Hello World"; # <- THIS IS NOT JSON !!!
curl_setopt($ch, CURLOPT_POSTFIELDS,$data);

# try: 
$data='{"text":"Hello World"}';

(that's the simplest way to state JSON)