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GitHub - nicklaw5/go-respond: A Go package for handling common HTTP JSON responses.
A Go package for handling common HTTP JSON responses. - nicklaw5/go-respond
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GitHub - nicklaw5/go-respond: A Go package for handling common HTTP JSON responses.

GitHub - nicklaw5/go-respond: A Go package for handling common HTTP JSON responses.

go-respond

A Go package for handling common HTTP JSON responses.

GoDoc Build Status Coverage Status Go Report Card

Installation

go get github.com/nicklaw5/go-respond

Usage

The goal of go-respond is to take most of the grunt work out preparing your JSON response. Here's a simple example:

package main

import (
    "net/http"

    resp "github.com/nicklaw5/go-respond"
)

type User struct {
    ID    int    `json:"id"`
    Name  string `json:"name"`
    Email string `json:"email"`
}

func main() {
    http.HandleFunc("/api/users", func(w http.ResponseWriter, r *http.Request) {
        users := []User{
            {1, "Billy", "[email protected]"},
            {2, "Joan", "[email protected]"},
        }

        resp.NewResponse(w).Ok(users)
    })

    http.ListenAndServe(":8080", nil)
}

Response Methods

Response Code Method Name
200 Ok()
201 Created()
202 Accepted()
204 NoContent()
400 BadRequest()
401 Unauthorized()
403 Forbidden()
404 NotFound()
405 MethodNotAllowed()
406 NotAcceptable()
409 Conflict()
410 Gone()
411 LengthRequired()
412 PreconditionFailed()
413 RequestEntityTooLarge()
415 UnsupportedMediaType()
422 UnprocessableEntity()
500 InternalServerError()
501 NotImplemented()
502 BadGateway()
503 ServiceUnavailable()
504 GatewayTimeout()

See here for a complete list of HTTP responses, along with an explanation of each.

Please submit a PR if you want to add to this list. Only the most common response types have been included.

To Long, Don't Write

Sometimes you don't need to return a specific content-message but don't want the response body to be empty. In this case you can use the DefaultMessage() for responding with json containing the default message for the corresponding status code.

package main

import (
    "net/http"
    resp "github.com/nicklaw5/go-respond"
)

func main() {
    http.HandleFunc("/api/users", func(w http.ResponseWriter, r *http.Request) {
        // ...
        if !authenticated {
            resp.NewResponse(w).DefaultMessage().
                Unauthorized(nil)
        }
        // ...
    })
    http.ListenAndServe(":8080", nil)
}

Would respond with {"status":401,"message":"Unauthorized"}

Handling Errors

The best option for handling errors that may occur while marshalling the JSON response, is to use Negroni's Recovery middleware. Here's an example:

package main

import (
    "net/http"

    "github.com/urfave/negroni"
    resp "github.com/nicklaw5/go-respond"
)

type Response struct {
    Success bool `json:"success"`
}

func main() {
    mux := http.NewServeMux()
    mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
        resp.NewResponse(w).Ok(&Response{true})
    })

    n := negroni.New()
    recovery := negroni.NewRecovery()
    recovery.ErrorHandlerFunc = func(error interface{}) {
        // do something with the unexpected error
    }

    n.Use(recovery)
    n.UseHandler(mux)

    http.ListenAndServe(":8080", n)
}

License

This package is distributed under the terms of the MIT License.

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