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🍑 HTTP Input for Go - HTTP Request from/to Go Struct (Bi-directional Data Binding between Go Struct and http.Request)

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httpin - HTTP Input for Go

HTTP Request from/to Go Struct

Core Features

httpin helps you easily decode data from an HTTP request, including:

  • Query parameters, e.g. ?name=john&is_member=true
  • Headers, e.g. Authorization: xxx
  • Form data, e.g. username=john&password=******
  • JSON/XML Body, e.g. POST {"name":"john"}
  • Path variables, e.g. /users/{username}
  • File uploads

You only need to define a struct to receive/bind data from an HTTP request, without writing any parsing stuff code by yourself.

Since v0.15.0, httpin also supports creating an HTTP request (http.Request) from a Go struct instance.

httpin is:

Add Httpin Directives by Tagging the Struct Fields with in

type ListUsersInput struct {
	Token    string  `in:"query=access_token;header=x-access-token"`
	Page     int     `in:"query=page;default=1"`
	PerPage  int     `in:"query=per_page;default=20"`
	IsMember bool    `in:"query=is_member"`
    Search   *string `in:"query=search;omitempty"`
}

How to decode an HTTP request to Go struct?

func ListUsers(rw http.ResponseWriter, r *http.Request) {
	input := r.Context().Value(httpin.Input).(*ListUsersInput)

	if input.IsMember {
		// Do sth.
	}
	// Do sth.
}

How to encode a Go struct to HTTP request?

func SDKListUsers() {
	payload := &ListUsersInput{
		Token:    os.Getenv("MY_APP_ACCESS_TOKEN"),
		Page:     2,
		IsMember: true,
	}

	// Easy to remember, http.NewRequest -> httpin.NewRequest
	req, err := httpin.NewRequest("GET", "/users", payload)
	// ...
}

Why this package?

Compared with using net/http package

func ListUsers(rw http.ResponseWriter, r *http.Request) {
	page, err := strconv.ParseInt(r.FormValue("page"), 10, 64)
	if err != nil {
		// Invalid parameter: page.
		return
	}
	perPage, err := strconv.ParseInt(r.FormValue("per_page"), 10, 64)
	if err != nil {
		// Invalid parameter: per_page.
		return
	}
	isMember, err := strconv.ParseBool(r.FormValue("is_member"))
	if err != nil {
		// Invalid parameter: is_member.
		return
	}

	// Do sth.
}
Benefits Before (use net/http package) After (use ggicci/httpin package)
βŒ›οΈ Developer Time 😫 Expensive (too much parsing stuff code) πŸš€ Faster (define the struct for receiving input data and leave the parsing job to httpin)
♻️ Code Repetition Rate 😞 High 😍 Lower
πŸ“– Code Readability 😟 Poor 🀩 Highly readable
πŸ”¨ Maintainability 😑 Poor πŸ₯° Highly maintainable

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