POST request to DeepL api through node.js not working

Question

Can anyone spot any problems that may explain why the api client is giving me the forbidden error? I know the credentials are correct, as GET requests w the same info in the url work find.

Thank you in advance

 app.get('/translate', (req, res) => {
    var textToTranslate = "Hello friend"
    const targetLanguage = "ES"
    var link = `https://api-free.deepl.com/v2/translate`

    var options = 
    {
      method: 'POST',
      headers: {
        "Host": 'api-free.deepl.com',
        "Content-Length": 54,
        "Content-Type": 'application/x-www-form-urlencoded',
        "User-Agent": "YourApp",
        "Accept": "*/*",

      },
      body: JSON.stringify({
        'auth_key': deeplAccessCode,
        'text': textToTranslate,
        'target_lang': targetLanguage
    }),
    }

  
    return fetch(link, options)
      .then((response) => {
        console.log(response)
        return response.json(); //Transform http body to json
      })
        .then((json)=> {
          res.send(json) //return json to browser
        })
        .catch(e => {
          console.log(e)
          return res.sendStatus(400);
          });
  })

score 1 · Answer 1 · answered Feb 21 '22 at 14:08

It's probably failing because you're setting your Content-Type of your body to be application/x-www-form-urlencoded (which is correct as per the DeepL API specification) but then you provide a JSON body (which would require content type to be application/json).

You need to provide a URL-encoded body instead, like the part you can also append to the URL after the ?. See also this answer on SO.

POST request to DeepL api through node.js not working

1 Answers1