How can I test file-upload with hapi? - node.js

Question

I have this payload format in my hapi route that accepts only multipart/form-data data and the output is set as a stream:
payload: {
maxBytes: 1024,
output: 'stream',
parse: true,
allow: 'multipart/form-data',
}
I want to test that route and my payload is this:
const FD = new FormData();
FD.append('field1', 'value');
FD.append('field2', 'value');
The hapi inject method looks like this:
const res = await server.inject({
method,
url,
headers: {
...
'Content-Type': 'multipart/form-data; boundary=--SEPARATION--',
},
payload: FD,
});
I am getting
Invalid multipart payload format
I tried to set a stream using a Steam object too but it doesn't work. Also I tried to send a File object.
At this point I just want to send something to the route that will not result in an error. It's not necessary to be a FormData. Anything that will be accepted by the route is fine as long as I can add some custom fields to test it further.
Thanks in advance.

Answer 1

As far as I know, FormData doesn’t exist in node.js, so I assume you’re using the form-data module?
In that case, you need to ask form-data for the buffer and headers separately, like this:
const FormData = require('form-data');
const FD = new FormData();
FD.append('field1', 'value');
FD.append('field2', 'value');
const response = await server.inject({
method,
url,
headers: {
<your other headers>
...FD.getHeaders(),
},
payload: FD.getBuffer(),
});
If you want to test sending files, you also need to provide the filename property to append(…) for the binary data to be decoded correctly by the server:
const fileContent = <any Buffer>;
FD.append('form_file_property', fileContent, {filename: 'a testfile'});