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kira.go
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kira.go
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package kira
// TODO:
// - Implement "plugin" mechanism.
// - We can use "plugin" to provide additional functionalities to the user like: Auth, Cache, Database ORM...
// - Error wrapper: Error{op: "op.name", err: Error}...
import (
"fmt"
"github.com/google/uuid"
"net/http"
"os"
"sync"
"time"
"github.com/go-kira/kira/modules/config"
"github.com/go-kira/kira/modules/log"
"github.com/julienschmidt/httprouter"
)
var hero = ` __ __ _
/ //_/ (_) ____ ___ _
/ ,< / / / __// _ /
/_/|_| /_/ /_/ \_,_/
`
// some bytes :)
const (
KB = 1 << 10
MB = 1 << 20
GB = 1 << 30
)
// Map a type to represent map, this will be used alot in the internal statusCode.
type Map map[string]interface{}
// App hold the framework options
type App struct {
Routes []*Route
Middlewares []Middleware
Router *httprouter.Router
Configs *config.Config
Env string
// Not found handler
NotFoundHandler HandlerFunc
// Logger
logger *log.Logger
// Context pool
pool *sync.Pool
mutex sync.Mutex
}
// New init the framework
func New() *App {
app := &App{}
app.Env = getEnv()
app.Configs = getConfig()
app.Router = httprouter.New()
app.logger = setupLogger(app.Configs, setupWriter(app.Configs), log.Fields{})
// Context pool
app.pool = &sync.Pool{
New: func() interface{} {
return &Context{
logger: app.logger,
configs: app.Configs,
data: make(map[string]interface{}),
env: app.Env,
statusCode: http.StatusOK,
requestID: uuid.New().String(),
startAt: time.Now(),
}
},
}
// return App instance
return app
}
// Run the framework
func (app *App) Run(args ...interface{}) *App {
fmt.Printf("%v", hero)
// Register the application routes
app.RegisterRoutes()
// Timezone
tz := app.Configs.GetString("app.timezone")
if tz != "" {
os.Setenv("TZ", tz)
}
// Server
server := &http.Server{
Handler: app.Router,
}
var config interface{}
if len(args) > 0 {
config = args[0]
} else {
config = nil
}
switch config.(type) {
case *http.Server:
server = config.(*http.Server)
server.Handler = app.Router
case string:
server.Addr = serverAddr(app.Configs, config.(string))
default:
server.Addr = serverAddr(app.Configs)
}
if !app.Configs.GetBool("server.tls", false) {
app.StartServer(server)
} else {
app.StartTLSServer(server)
}
// App instance
return app
}
// NotFound custom not found handler.
func (app *App) NotFound(ctx HandlerFunc) {
app.NotFoundHandler = ctx
}
// default not found handler.
func defaultNotFound(ctx *Context) {
if ctx.WantsJSON() {
ctx.Response().Header().Set("Content-Type", "application/json")
} else {
ctx.Response().Header().Set("Content-Type", "text/html")
}
ctx.Status(http.StatusNotFound)
// JSON
if ctx.WantsJSON() {
// Json response
ctx.JSON(struct {
Error int `json:"error"`
Message string `json:"message"`
}{http.StatusNotFound, "404 Not Found"})
return
}
// HTML
// Validate if the template exists
if ctx.ViewExists("errors/404") {
err := ctx.View("errors/404")
if err != nil {
ctx.Error(err)
}
} else {
ctx.WriteHTML("<!DOCTYPE html><html><head><title>404 Not Found</title></head><body>404 Not Found</body></html>")
}
}