In Go's http package, how do I get the query string on a POST request?

Question

I\'m using the httppackage from Go to deal with POST request. How can I access and parse the content of the query string from the Requestobject ? I can

Answer 1

Here's a more concrete example of how to access GET parameters. The Request object has a method that parses them out for you called Query:

Assuming a request URL like http://host:port/something?param1=b

func newHandler(w http.ResponseWriter, r *http.Request) {
  fmt.Println("GET params were:", r.URL.Query())

  // if only one expected
  param1 := r.URL.Query().Get("param1")
  if param1 != "" {
    // ... process it, will be the first (only) if multiple were given
    // note: if they pass in like ?param1=¶m2= param1 will also be "" :|
  }

  // if multiples possible, or to process empty values like param1 in
  // ?param1=¶m2=something
  param1s := r.URL.Query()["param1"]
  if len(param1s) > 0 {
    // ... process them ... or you could just iterate over them without a check
    // this way you can also tell if they passed in the parameter as the empty string
    // it will be an element of the array that is the empty string
  }    
}

Also note "the keys in a Values map [i.e. Query() return value] are case-sensitive."