Introduction

In many cases sending multipart files in POST request is necessary, so in this example we will show you how to do it. We will upload a JSON file to our file repository, but this is the same for any other multipart upload.

Example

1. Creating the file content
   
   We can create the content of the file during execution, or we might have it already loaded from a previous call. Anyhow, the most important aspect is that the content itself is defined as a binary Buffer. In this example, the content will be a JSON String and we will transform it into a binary buffer.
   
   For that, in a “function” node, we will create the JSON String and transform it into a binary buffer.
   
   

   Open

   

2. Preparing the request
   
   We are going to make use of the Platform Management API for file uploads. In our case we will have to define the URL, method and headers:
   
   
   

   Open

   

3. Preparing the multipart
   
   In order to upload the file, we will have to set up the Multipart by hand.

   First we set the ContentType definition to multipart in the headers
   
   

   Then the multipart body is completed, making sure that it is a binary buffer.
   
   
   

    

4. Request invocation
   
   Next, we define the HTTP Request node, so that it takes the method and URL of the message from the previous node:
   
   
   

   
   
   

5. Result of the execution
   
   The flow will look like this and we can run it to upload the file.
   
   
   

    

Here is an example for you to import and test: