How Can I Access Query Strings from POST Requests in Go?

Accessing Query Strings from POST Requests in Go's HTTP Package

When working with HTTP POST requests in Go, it's common to need to access the query string. The query string is a portion of the request URL that contains additional data in the format of key-value pairs.

Solution:

To access the query string from a POST request using Go's HTTP package, you can utilize the Query method of the http.Request object:

func newHandler(w http.ResponseWriter, r *http.Request) {
  queries := r.URL.Query()

  // Access individual query parameters
  param1 := queries.Get("param1")

  // Access multiple values associated with a key
  param1s := queries["param1"]
}

Example:

For a request with the URL http://example.com/path?param1=value1¶m2=value2, the following code will retrieve the corresponding values:

queries := r.URL.Query()
param1 := queries.Get("param1") // "value1"
param2 := queries.Get("param2") // "value2"

Note:

• Key names in the query string are case-sensitive.
• Repeated values for the same key will be stored as an array in the Values map returned by the Query method.

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