Introduction

URL decoding is a common operation in web development when dealing with encoded strings in URLs. Thankfully, Go provides a built-in package called net/url that allows us to easily decode URL-encoded strings. In this tutorial, we will guide you through the process of URL decoding a string in Go.

  1. Import the necessary package:
import (
    ""net/url""
)
  1. Call the QueryUnescape function from the net/url package, passing in the URL-encoded string as an argument. This function returns the decoded string:
decodedString, err := url.QueryUnescape(encodedString)
if err != nil {
    // Handle error
}

Note that the QueryUnescape function also handles decoding of URL-encoded query parameters, not just the entire string.

  1. Check for any errors that may have occurred during the decoding process. If an error is encountered, handle it appropriately. For example, you may choose to log the error or return an error response to the user.

  2. Make use of the decoded string in your code as needed. For example, you might want to display it on a webpage, manipulate it further, or use it to make API requests.

Here’s a complete example that demonstrates the URL decoding of a string:

import (
    ""fmt""
    ""net/url""
)

func main() {
    encodedString := ""Hello%20World%21""
    
    decodedString, err := url.QueryUnescape(encodedString)
    if err != nil {
        fmt.Println(""Error decoding string:"", err)
        return
    }
    
    fmt.Println(""Decoded string:"", decodedString)
}

When you run the above code, it should output:

Decoded string: Hello World!

That’s it! You have successfully learned how to decode a URL-encoded string in Go. You can now confidently handle URL decoding in your Go applications.

I hope you found this tutorial helpful!