Handling HTTP uploaded files and forms as a stream

The standard library provides methods to deal with file uploads. You can call http.Request.ParseMultipartForm, and work with uploaded files. There is one problem with this approach: ParseMultipartForm processes all uploads up to a given memory limit. It may even use temporary files. This is not a scalable approach if you are dealing with large files. This section describes how you can work with file uploads without creating temporary files or a large memory footprint.

How to do it...

On the client side, do the following:

1. Create an HTML form with multipart/form-data encoding.
2. Add the form fields and files that you are planning to upload.

An example is given here:

<form action="/upload" method="post" enctype="multipart/form-data">
  <input type="text" name="textField">
  <input type="file" name="fileField&quot...