Sending form data arrays in Javascript using Request?

Question

I'm trying to use an API that accepts the data as form data. In the PHP example I have been given, the working code is as follows using GuzzleHttp:

    $response = $client->post('http://example.com', [
        'headers' => [
            'Accept' => 'application/json',
            'Authorization' => 'Bearer ' . $accessToken
        ],
        'form_params' => [
            'items' => $items
        ]
    ])

In my JS, I have the below code. According to the Request docs, using formData will parse an object into the correct format using the FormData library.

I've got this working manually using Postman. Im sending a x-www-form-urlencoded body with fields as:

item[0] = "abc"
item[1] = "def"

Can anyone see what I'm missing here as to why this isn't working?

const items = ["abc", "def"];
const response = await post({items: items}, "http://example.com")

exports.post = async function (data, url) {
    const token = await getAccessToken();
    const response = await request({
        method: 'POST',
        url: url,
        headers:
            {
                Connection: 'keep-alive',
                Authorization: `Bearer ${token.data.access_token}`,
                Accept: 'application/json',
            },
        formData: data
    });
    return JSON.parse(response);
};

Which FormData library you are talking about here? Can you add link to the library? — Ank
– Ank, Commented Sep 3, 2019 at 13:24
Request uses github.com/form-data/form-data. However I think i've just realised that whilst it uses form-data, it doesn't take an array and submit it like I need — K20GH
– K20GH, Commented Sep 3, 2019 at 13:27

Vassilis Barzokas · Accepted Answer · 2019-09-03 13:40:33Z

2

I think you have a typo in the property items which should be item.

The JavaScript code you quoted is actually sending this:

formData: { items: [ 'abc', 'def' ] }

While from the PHP code you quoted, it looks like you should send:

formData: {item: ['abc', 'def']}

So I think you should change your example's code to:

const response = await post({item: items}, "http://example.com");

answered Sep 3, 2019 at 13:40

Vassilis Barzokas

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1 Comment

K20GH Over a year ago

Ah thats a typo in my copying over the PHP. I have fixed that

Ank · Accepted Answer · 2019-09-03 13:37:21Z

0

From documentation, it seems that object should be passed instead of array.

var formData = {
  my_field: 'my_value',
  my_file: fs.createReadStream(__dirname + '/unicycle.jpg'),
};

request.post({url:'http://service.com/upload', formData: formData}, function(err, httpResponse, body) {
  if (err) {
    return console.error('upload failed:', err);
  }
  console.log('Upload successful!  Server responded with:', body);
});

answered Sep 3, 2019 at 13:37

Ank

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