Why Are My Go HTTP Server JSON Responses Empty?

Making HTTP Responses with JSON

Q: JSON Response Fails to Send Data

In a Go HTTP server implementation, JSON responses are not being sent correctly. The postman client receives an empty response with a "text/plain" content-type. How can this issue be resolved?

A:

The key difference lies in the visibility of the struct variables. In Go, struct variables must be exported (public) in order to be marshaled into JSON.

Original Code:

<code class="go">type ResponseCommands struct {
    key   string
    value bool
}</code>

Corrected Code:

<code class="go">type ResponseCommands struct {
    Key   string
    Value bool
}</code>

By capitalizing the first letter of the variable names, they become exported and accessible for JSON marshaling. This ensures that the desired data is correctly included in the JSON response.

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