form

form

Package form converts form values (url.Values) into structs.

Example

Here's a quick example: we parse POST form values and then decode them into a struct:

Quickstart

package main

import (
    "fmt"
    "net/http"
    
    "codeberg.org/aur0ra/form"
)

type User struct {
    ID   uint64 `form:"id,required"`
    Name string `form:"name"`
    Age  int    `form:"age"`
}

func Handler(w http.ResponseWriter, r *http.Request) {
    r.ParseForm()
    
    user, _ := form.Decode[User](r.Form)
	
    fmt.Println(user)
}

Performance

Performance can be more than doubles by reusing the decoder:

var decoder, _ := form.NewDecoder[User]()

func Handler(w http.ResponseWriter, r *http.Request) {
    r.ParseForm()
	
    user, _ := decoder.Decode(r.Form)
	
    fmt.Println(user)
}

The supported field types in the struct are:

• string
• int, int8, int16, int32, int64
• uint, uint8, uint16, uint32, uint64
• bool
• float32, float64
• complex64, complex128
• a pointer to one of the above types (Coming Soon)

Custom types can be decoded when they implement field.Parser.

type Parser interface {
	ParseForm(field string) (any, error)
}

Parser must return the custom type or nil.