Why Doesn't My Go POST Request Send Data to the Receiving End?

Sending a POST Request with Go

Making POST requests in Go can be a common task. This article will provide a solution to a common issue encountered when attempting to send a POST request in Go.

Problem:

"I'm trying to make a POST request, but I can't seem to get it working. Nothing is received on the receiving end. I'm aware of the PostForm function, but I believe it can't be tested with httputil, correct?"

Solution:

The code provided in the problem statement is mostly correct. The missing component is the assignment of the form data to the request body. Here is the corrected code:

req, err := http.NewRequest("POST", url, strings.NewReader(form.Encode()))

In the original code, the form data was assigned to req.PostForm, which is used for submitting form data as part of the headers. For a POST request, the form data should be sent in the body of the request. Using strings.NewReader(form.Encode()) creates a io.Reader that contains the form data encoded as a URL-encoded string, which is the expected format for POST requests using the application/x-www-form-urlencoded content type.

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