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main.go
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main.go
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package main
import (
"encoding/json"
"errors"
"log"
"net/http"
"os"
"runtime"
"github.com/cbroglie/mustache"
"github.com/go-chi/chi"
"github.com/go-chi/chi/middleware"
"github.com/go-chi/render"
"github.com/maverickames/omeh"
)
// App Main App controller
type App struct {
LogFile *os.File
appName string
debug bool
router *chi.Mux
em *omeh.ErrManager
log *log.Logger
logError *log.Logger
weblog *log.Logger
}
func main() {
app := App{}
app.debug = true
app.appName = "Example App"
app.LogFile = os.Stdout
// Setup Logging
app.log = log.New(app.LogFile, "["+app.appName+"] Logger: ", log.Ldate|log.Ltime)
app.logError = log.New(app.LogFile, "["+app.appName+"] ErrorHandler: ", log.Ldate|log.Ltime)
app.weblog = log.New(app.LogFile, "["+app.appName+"] WebLog: ", log.Ldate|log.Ltime)
// Setup Error Handling for routes
app.em = omeh.New(app.debug)
// Setup the default processor for error
app.em.SetDefaultHandler(app.em.ReturnError)
// Or pass a custom error creation function
//app.em.SetDefaultHandler(ReturnError)
// Setup the Error Logger
// this is your operertunity to process errors however you wants
app.em.SetErrorLogHandler(app.logErrorHandler)
// ProcessError you can use the default or build a custom one
// This example shows how to return a application layer response
app.em.SetHTTPErrorHandler(func(h omeh.ErrorHandlerdesc) http.HandlerFunc {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ErrResponse := h(w, r)
if ErrResponse != nil {
app.em.LogError(ErrResponse)
renderdView, err := mustache.RenderFile("errorResponse.html.mustache", ErrResponse)
if err != nil {
jsonData, err := json.Marshal(ErrResponse)
if err != nil {
app.logError.Println(err)
return
}
w.WriteHeader(ErrResponse.HTTPStatusCode)
w.Write([]byte(jsonData))
return
}
w.Write([]byte(renderdView))
}
})
})
// Create Router
app.router = chi.NewRouter()
// Add Middleware
middleware.DefaultLogger = middleware.RequestLogger(&middleware.DefaultLogFormatter{Logger: app.weblog, NoColor: true})
app.router.Use(middleware.Logger)
app.router.Use(render.SetContentType(render.ContentTypeJSON))
// Set NotFound route
app.router.NotFound(app.em.HandleHTTPErrors(app.Render404notFound))
// Set basic route
app.router.Get("/", app.em.HandleHTTPErrors(app.root))
app.router.Get("/broken", app.em.HandleHTTPErrors(app.brokenRoute))
// Log an error in the application
err := errors.New("Server broke doing stuff.")
if err != nil {
app.em.LogError(app.em.ErrorHandler(err, omeh.StatusInternalServerError, "Addition detail if desired."))
}
// Start webserver with router
app.log.Println("Server runing from " + "localhost:5000")
err = http.ListenAndServe("localhost:5000", app.router)
if err != nil {
app.weblog.Fatal(err)
}
}
// logError Handle all errors received from Router
func (app *App) logErrorHandler(ErrResponse *omeh.ErrResponse) {
if app.debug {
app.logError.Printf(
"\n -- Function: %s\n -- SourceFile: %s\n -- LineNumber: %d\n -- ErrorDetails: %v\n -- RequestDetail: %s\n -- ErrorCode: %d\n",
runtime.FuncForPC(ErrResponse.FuncPC).Name(),
ErrResponse.FuncFN,
ErrResponse.FuncLine,
ErrResponse.Err,
ErrResponse.RequestDetail,
ErrResponse.AppCode,
)
} else {
app.logError.Printf(
"\n -- ErrorDetails: %v\n -- RequestDetail: %s\n -- ErrorCode: %d\n",
ErrResponse.Err,
ErrResponse.RequestDetail,
ErrResponse.AppCode,
)
}
}
func ReturnError(err error, errResp *omeh.ErrResponse, reqDetial string) *omeh.ErrResponse {
return omeh.StatusNotFound
}