How to properly transmit files via API? Why is GET not suitable?

It is better to transmit files via API using POST requests with multipart/form-data. This allows sending binary data along with metadata in the request body.

Why GET is not suitable:

• GET is intended for retrieving data, not for transmitting large or binary data.
• GET parameters are passed in the URL, which is limited in length and not suitable for large volumes of data.
• URLs are not suitable for binary data, as they require encoding and can lead to errors.

Example of transmitting a file via POST with multipart/form-data:

POST /upload HTTP/1.1
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary

------WebKitFormBoundary
Content-Disposition: form-data; name="file"; filename="example.txt"
Content-Type: text/plain

(file contents)
------WebKitFormBoundary--

Thus, POST with multipart/form-data is the standard and reliable way to transmit files via API.