Web Form With File Upload
HTML web forms allow to send files along with the form data:
<input type="file" name="foo" />
<!-- It is possible to upload multiple files using the multiple attribute: -->
<input type="file" name="foo" multiple="true" />
OpenEndpoints automatically understands the correct enctype to separate uploaded content from form <input> data:
File Upload
enctype
Web form with no file upload
application/x-www-form-urlencoded
Web form with one or many file uploads
multipart/form-data
Once the file(s) have been uploaded by the user, the following options exist to do things with these files:

Option 1 - Email attachment

The Email Task allows to add all uploaded files as attachments:
<attachments-from-request-file-uploads/>
That means: It is not possible to select which file should be attached as an attachment. All files are always attached.

Option 2 - Insert file content into HTTP request body

When sending an HTTP request from OpenEndpoints using the HttpRequest Task , and when specifying that HTTP request should contain an XML body, and when that XML is specified inline, the optional attribute upload-files="true" may be set.
For example:
<xml-body upload-files="true">
<foo upload-field-name="xyz" encoding="base64"/>
</xml-body>
This syntax indicates that the element <foo> will be filled with the contents of the uploaded file with the filename "xyz". The encoding is always base64, no other encodings are supported.