132 lines
3.1 KiB
Go
132 lines
3.1 KiB
Go
package httpserver
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import (
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"context"
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"io/ioutil"
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"net/http"
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"strings"
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"time"
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"github.com/labstack/echo"
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"github.com/labstack/echo/middleware"
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"github.com/rs/zerolog"
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"go.dev.pztrn.name/giredore/internal/configuration"
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"go.dev.pztrn.name/giredore/internal/logger"
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)
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var (
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log zerolog.Logger
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Srv *echo.Echo
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)
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func Initialize() {
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log = logger.Logger.With().Str("type", "internal").Str("package", "httpserver").Logger()
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log.Info().Msg("Initializing...")
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Srv = echo.New()
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Srv.Use(middleware.Recover())
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Srv.Use(requestLogger())
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Srv.Use(checkAllowedIPs())
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Srv.DisableHTTP2 = true
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Srv.HideBanner = true
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Srv.HidePort = true
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Srv.Binder = echo.Binder(&StrictJSONBinder{})
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Srv.GET("/_internal/waitForOnline", waitForHTTPServerToBeUpHandler)
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}
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// Shutdown stops HTTP server. Returns true on success and false on failure.
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func Shutdown() {
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log.Info().Msg("Shutting down HTTP server...")
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err := Srv.Shutdown(context.Background())
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if err != nil {
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log.Fatal().Err(err).Msg("Failed to stop HTTP server")
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}
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log.Info().Msg("HTTP server shutted down")
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}
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// Start starts HTTP server and checks that server is ready to process
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// requests. Returns true on success and false on failure.
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func Start() {
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log.Info().Str("address", configuration.Cfg.HTTP.Listen).Msg("Starting HTTP server...")
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go func() {
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err := Srv.Start(configuration.Cfg.HTTP.Listen)
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if !strings.Contains(err.Error(), "Server closed") {
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log.Fatal().Err(err).Msg("HTTP server critical error occurred")
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}
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}()
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// Check that HTTP server was started.
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// nolint:exhaustruct
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httpc := &http.Client{Timeout: time.Second * 1}
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checks := 0
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for {
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checks++
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if checks >= configuration.Cfg.HTTP.WaitForSeconds {
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log.Fatal().Int("seconds passed", checks).Msg("HTTP server isn't up")
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}
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time.Sleep(time.Second * 1)
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localCtx, cancelFunc := context.WithTimeout(context.Background(), time.Second*1)
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req, err := http.NewRequestWithContext(localCtx, "GET", "http://"+configuration.Cfg.HTTP.Listen+"/_internal/waitForOnline", nil)
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if err != nil {
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log.Panic().Err(err).Msg("Failed to create HTTP request!")
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}
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resp, err := httpc.Do(req)
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if err != nil {
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log.Debug().Err(err).Msg("HTTP error occurred, HTTP server isn't ready, waiting...")
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continue
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}
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response, err := ioutil.ReadAll(resp.Body)
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resp.Body.Close()
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if err != nil {
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log.Debug().Err(err).Msg("Failed to read response body, HTTP server isn't ready, waiting...")
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continue
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}
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log.Debug().Str("status", resp.Status).Int("body length", len(response)).Msg("HTTP response received")
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if resp.StatusCode == http.StatusOK {
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if len(response) == 0 {
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log.Debug().Msg("Response is empty, HTTP server isn't ready, waiting...")
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continue
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}
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log.Debug().Int("status code", resp.StatusCode).Msgf("Response: %+v", string(response))
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if len(response) == 17 {
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// This is useless context cancel function call. Thanks to lostcancel linter.
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cancelFunc()
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break
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}
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}
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}
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log.Info().Msg("HTTP server is ready to process requests")
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}
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func waitForHTTPServerToBeUpHandler(ectx echo.Context) error {
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response := map[string]string{
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"error": "None",
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}
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// nolint:wrapcheck
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return ectx.JSON(200, response)
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}
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