mirror of
https://github.com/elyby/chrly.git
synced 2024-08-24 22:00:01 +05:30
139 lines
3.4 KiB
Go
139 lines
3.4 KiB
Go
package http
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import (
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"context"
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"encoding/json"
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"net/http"
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"os"
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"os/signal"
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"strings"
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"github.com/gorilla/mux"
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"github.com/mono83/slf"
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"github.com/mono83/slf/wd"
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"github.com/elyby/chrly/dispatcher"
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)
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type Emitter interface {
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dispatcher.Emitter
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}
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func StartServer(server *http.Server, logger slf.Logger) {
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done := make(chan bool, 1)
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go func() {
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logger.Info("Starting the server, HTTP on: :addr", wd.StringParam("addr", server.Addr))
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if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
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logger.Emergency("Error in main(): :err", wd.ErrParam(err))
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}
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close(done)
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}()
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go func() {
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s := waitForExitSignal()
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logger.Info("Got signal: :signal, starting graceful shutdown", wd.StringParam("signal", s.String()))
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server.Shutdown(context.Background())
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logger.Info("Graceful shutdown succeed, exiting", wd.StringParam("signal", s.String()))
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close(done)
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}()
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<-done
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}
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func waitForExitSignal() os.Signal {
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ch := make(chan os.Signal, 1)
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signal.Notify(ch, os.Interrupt, os.Kill)
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return <-ch
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}
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type loggingResponseWriter struct {
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http.ResponseWriter
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statusCode int
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}
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func (lrw *loggingResponseWriter) WriteHeader(code int) {
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lrw.statusCode = code
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lrw.ResponseWriter.WriteHeader(code)
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}
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func CreateRequestEventsMiddleware(emitter Emitter, prefix string) mux.MiddlewareFunc {
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beforeTopic := strings.Join([]string{prefix, "before_request"}, ":")
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afterTopic := strings.Join([]string{prefix, "after_request"}, ":")
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return func(handler http.Handler) http.Handler {
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return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
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emitter.Emit(beforeTopic, req)
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lrw := &loggingResponseWriter{
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ResponseWriter: resp,
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statusCode: http.StatusOK,
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}
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handler.ServeHTTP(lrw, req)
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emitter.Emit(afterTopic, req, lrw.statusCode)
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})
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}
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}
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type Authenticator interface {
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Authenticate(req *http.Request) error
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}
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func CreateAuthenticationMiddleware(checker Authenticator) mux.MiddlewareFunc {
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return func(handler http.Handler) http.Handler {
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return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
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err := checker.Authenticate(req)
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if err != nil {
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apiForbidden(resp, err.Error())
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return
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}
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handler.ServeHTTP(resp, req)
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})
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}
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}
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func NotFoundHandler(response http.ResponseWriter, _ *http.Request) {
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data, _ := json.Marshal(map[string]string{
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"status": "404",
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"message": "Not Found",
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})
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response.Header().Set("Content-Type", "application/json")
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response.WriteHeader(http.StatusNotFound)
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_, _ = response.Write(data)
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}
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func apiBadRequest(resp http.ResponseWriter, errorsPerField map[string][]string) {
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resp.WriteHeader(http.StatusBadRequest)
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resp.Header().Set("Content-Type", "application/json")
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result, _ := json.Marshal(map[string]interface{}{
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"errors": errorsPerField,
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})
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_, _ = resp.Write(result)
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}
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func apiForbidden(resp http.ResponseWriter, reason string) {
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resp.WriteHeader(http.StatusForbidden)
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resp.Header().Set("Content-Type", "application/json")
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result, _ := json.Marshal(map[string]interface{}{
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"error": reason,
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})
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_, _ = resp.Write(result)
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}
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func apiNotFound(resp http.ResponseWriter, reason string) {
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resp.WriteHeader(http.StatusNotFound)
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resp.Header().Set("Content-Type", "application/json")
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result, _ := json.Marshal([]interface{}{
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reason,
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})
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_, _ = resp.Write(result)
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}
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func apiServerError(resp http.ResponseWriter) {
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resp.WriteHeader(http.StatusInternalServerError)
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}
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