Submitting a form with file attachment | Apify Documentation
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Submitting a form with file attachment
When doing web automation with Apify, it can sometimes be necessary to submit an HTML form with file attachment. This article will cover a situation where the file is publicly accessible (e.g. hosted somewhere) and will use an Apify actor. If it is not possible to use request-promise, it might be necessary to use Puppeteer.
Downloading the file to memory
How to submit a form with attachment using request-promise.
After creating a new actor, the first thing to do is download the file. We can do that using the request-promise module, so make sure it is included.
const request = require(‘request-promise’);
The actual downloading is going to be slightly different for text and binary files. For a text file, it can simply be done like this:
const
fileData
=
await
request
(
'https://some-site.com/file.txt'
)
;
For
a binary file
,
we need to provide additional parameters so
as
not to interpret it
as
text
:
const
fileData
=
await
request
(
{
uri
:
'https://some-site.com/file.pdf'
,
encoding
:
null
}
)
;
In this case, fileData will be a Buffer instead of String.
Submitting the form
When the file is ready, we can submit the form as follows:
await
request
(
{
uri
:
'https://other-site.com/submit-form.php'
,
method
:
'POST'
,
formData
:
{
name
:
'John'
,
surname
:
'Doe'
,
email
:
,
attachment
:
{
value
:
fileData
,
options
:
{
filename
:
'file.pdf'
,
contentType
:
'application/pdf'
}
}
}
}
)
;
The header Content-Type: multipart/form-data will be set automatically.
