Refactor Manager, move webservice code from main.go into its own file
Extract some code from `cmd/flamenco-manager/main.go` into `webservice.go` in the same directory, just to make `main.go` a little smaller. No functional changes.
This commit is contained in:
parent
6e67f81804
commit
f97bfac8c5
@ -6,31 +6,21 @@ import (
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"context"
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"errors"
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"flag"
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"fmt"
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"io/fs"
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"math/rand"
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"net"
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"net/http"
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http_pprof "net/http/pprof"
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"net/url"
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"os"
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"os/signal"
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"runtime"
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"runtime/pprof"
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"strings"
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"sync"
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"syscall"
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"time"
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"github.com/benbjohnson/clock"
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"github.com/getkin/kin-openapi/openapi3filter"
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"github.com/labstack/echo/v4"
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"github.com/labstack/echo/v4/middleware"
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"github.com/mattn/go-colorable"
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"github.com/pkg/browser"
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"github.com/rs/zerolog"
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"github.com/rs/zerolog/log"
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"github.com/ziflex/lecho/v3"
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"git.blender.org/flamenco/internal/appinfo"
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"git.blender.org/flamenco/internal/manager/api_impl"
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@ -41,16 +31,13 @@ import (
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"git.blender.org/flamenco/internal/manager/local_storage"
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"git.blender.org/flamenco/internal/manager/persistence"
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"git.blender.org/flamenco/internal/manager/sleep_scheduler"
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"git.blender.org/flamenco/internal/manager/swagger_ui"
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"git.blender.org/flamenco/internal/manager/task_logs"
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"git.blender.org/flamenco/internal/manager/task_state_machine"
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"git.blender.org/flamenco/internal/manager/timeout_checker"
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"git.blender.org/flamenco/internal/manager/webupdates"
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"git.blender.org/flamenco/internal/own_url"
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"git.blender.org/flamenco/internal/upnp_ssdp"
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"git.blender.org/flamenco/pkg/api"
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"git.blender.org/flamenco/pkg/shaman"
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"git.blender.org/flamenco/web"
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)
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var cliArgs struct {
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@ -281,203 +268,6 @@ func buildFlamencoAPI(
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return flamenco
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}
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func buildWebService(
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flamenco api.ServerInterface,
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persist api_impl.PersistenceService,
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ssdp *upnp_ssdp.Server,
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webUpdater *webupdates.BiDirComms,
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ownURLs []url.URL,
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localStorage local_storage.StorageInfo,
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) *echo.Echo {
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e := echo.New()
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e.HideBanner = true
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e.HidePort = true
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// The request should come in fairly quickly, given that Flamenco is intended
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// to run on a local network.
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e.Server.ReadHeaderTimeout = 1 * time.Second
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// e.Server.ReadTimeout is not set, as this is quite specific per request.
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// Shaman file uploads and websocket connections should be allowed to run
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// quite long, whereas other queries should be relatively short.
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//
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// See https://github.com/golang/go/issues/16100 for more info about current
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// limitations in Go that get in our way here.
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// Hook Zerolog onto Echo:
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e.Use(lecho.Middleware(lecho.Config{
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Logger: lecho.From(log.Logger),
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}))
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// Ensure panics when serving a web request won't bring down the server.
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e.Use(middleware.Recover())
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// For development of the web interface, to get a less predictable order of asynchronous requests.
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if cliArgs.delayResponses {
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e.Use(randomDelayMiddleware)
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}
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// Disabled, as it causes issues with "204 No Content" responses.
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// TODO: investigate & file a bug report. Adding the check on an empty slice
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// seems to fix it:
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//
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// func (w *gzipResponseWriter) Write(b []byte) (int, error) {
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// if len(b) == 0 {
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// return 0, nil
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// }
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// ... original code of the function ...
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// }
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// e.Use(middleware.Gzip())
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e.Use(middleware.CORSWithConfig(middleware.CORSConfig{
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AllowOrigins: corsOrigins(ownURLs),
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// List taken from https://www.bacancytechnology.com/blog/real-time-chat-application-using-socketio-golang-vuejs/
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AllowHeaders: []string{
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echo.HeaderAccept,
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echo.HeaderAcceptEncoding,
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echo.HeaderAccessControlAllowOrigin,
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echo.HeaderAccessControlRequestHeaders,
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echo.HeaderAccessControlRequestMethod,
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echo.HeaderAuthorization,
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echo.HeaderContentLength,
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echo.HeaderContentType,
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echo.HeaderOrigin,
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echo.HeaderXCSRFToken,
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echo.HeaderXRequestedWith,
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"Cache-Control",
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"Connection",
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"Host",
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"Referer",
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"User-Agent",
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"X-header",
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},
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AllowMethods: []string{"POST", "GET", "OPTIONS", "PUT", "DELETE"},
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}))
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// Load the API definition and enable validation & authentication checks.
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swagger, err := api.GetSwagger()
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if err != nil {
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log.Fatal().Err(err).Msg("unable to get swagger")
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}
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validator := api_impl.SwaggerValidator(swagger, persist)
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e.Use(validator)
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registerOAPIBodyDecoders()
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// Register routes.
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api.RegisterHandlers(e, flamenco)
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webUpdater.RegisterHandlers(e)
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swagger_ui.RegisterSwaggerUIStaticFiles(e)
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e.GET("/api/v3/openapi3.json", func(c echo.Context) error {
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return c.JSON(http.StatusOK, swagger)
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})
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// Serve UPnP service descriptions.
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if ssdp != nil {
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e.GET(ssdp.DescriptionPath(), func(c echo.Context) error {
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return c.XMLPretty(http.StatusOK, ssdp.Description(), " ")
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})
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}
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// Serve static files for the webapp on /app/.
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webAppHandler, err := web.WebAppHandler(webappEntryPoint)
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if err != nil {
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log.Fatal().Err(err).Msg("unable to set up HTTP server for embedded web app")
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}
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e.GET("/app/*", echo.WrapHandler(http.StripPrefix("/app", webAppHandler)))
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e.GET("/app", func(c echo.Context) error {
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return c.Redirect(http.StatusTemporaryRedirect, "/app/")
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})
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// Serve the Blender add-on. It's contained in the static files of the webapp.
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e.GET("/flamenco3-addon.zip", echo.WrapHandler(webAppHandler))
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// The favicons are also in the static files of the webapp.
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e.GET("/favicon.png", echo.WrapHandler(webAppHandler))
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e.GET("/favicon.ico", echo.WrapHandler(webAppHandler))
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// Serve job-specific files (last-rendered image, task logs) directly from disk.
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log.Info().
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Str("onDisk", localStorage.Root()).
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Str("url", api_impl.JobFilesURLPrefix).
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Msg("serving job-specific files directly from disk")
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e.Static(api_impl.JobFilesURLPrefix, localStorage.Root())
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// Redirect / to the webapp.
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e.GET("/", func(c echo.Context) error {
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return c.Redirect(http.StatusTemporaryRedirect, "/app/")
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})
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// Register profiler functions.
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if cliArgs.pprof {
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e.GET("/debug/pprof/", echo.WrapHandler(http.HandlerFunc(http_pprof.Index)))
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e.GET("/debug/pprof/cmdline", echo.WrapHandler(http.HandlerFunc(http_pprof.Cmdline)))
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e.GET("/debug/pprof/profile", echo.WrapHandler(http.HandlerFunc(http_pprof.Profile)))
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e.GET("/debug/pprof/symbol", echo.WrapHandler(http.HandlerFunc(http_pprof.Symbol)))
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e.GET("/debug/pprof/trace", echo.WrapHandler(http.HandlerFunc(http_pprof.Trace)))
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for _, profile := range pprof.Profiles() {
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name := profile.Name()
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e.GET("/debug/pprof/"+name, echo.WrapHandler(http_pprof.Handler(name)))
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}
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log.Info().Msg("profiler debugging info available on /debug/pprof/")
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}
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// Log available routes
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routeLogger := log.Level(zerolog.TraceLevel)
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routeLogger.Trace().Msg("available routes:")
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for _, route := range e.Routes() {
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routeLogger.Trace().Msgf("%7s %s", route.Method, route.Path)
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}
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return e
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}
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// runWebService runs the Echo server, shutting it down when the context closes.
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// If there was any other error, it is returned and the entire server should go down.
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func runWebService(ctx context.Context, e *echo.Echo, listen string) error {
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serverStopped := make(chan struct{})
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var httpStartErr error = nil
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var httpShutdownErr error = nil
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go func() {
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defer close(serverStopped)
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err := e.Start(listen)
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if err == http.ErrServerClosed {
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log.Info().Msg("HTTP server shut down")
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} else {
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log.Warn().Err(err).Msg("HTTP server unexpectedly shut down")
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httpStartErr = err
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}
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}()
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select {
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case <-ctx.Done():
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log.Info().Msg("HTTP server stopping because application is shutting down")
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// Do a clean shutdown of the HTTP server.
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err := e.Shutdown(context.Background())
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if err != nil {
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log.Error().Err(err).Msg("error shutting down HTTP server")
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httpShutdownErr = err
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}
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// Wait until the above goroutine has stopped.
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<-serverStopped
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// Return any error that occurred.
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if httpStartErr != nil {
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return httpStartErr
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}
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return httpShutdownErr
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case <-serverStopped:
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// The HTTP server stopped before the application shutdown was signalled.
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// This is unexpected, so take the entire application down with us.
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if httpStartErr != nil {
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return httpStartErr
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}
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return errors.New("unexpected and unexplained shutdown of HTTP server")
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}
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}
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func buildShamanServer(configService *config.Service, isFirstRun bool) api_impl.Shaman {
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if isFirstRun {
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log.Info().Msg("Not starting Shaman storage service, as this is the first run of Flamenco. Configure the shared storage location first.")
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@ -583,49 +373,6 @@ func makeAutoDiscoverable(urls []url.URL) *upnp_ssdp.Server {
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return ssdp
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}
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// corsOrigins strips everything from the URL that follows the hostname:port, so
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// that it's suitable for checking Origin headers of CORS OPTIONS requests.
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func corsOrigins(urls []url.URL) []string {
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origins := make([]string, len(urls))
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// TODO: find a way to allow CORS requests during development, but not when
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// running in production.
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for i, url := range urls {
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// Allow the `yarn run dev` webserver do cross-origin requests to this Manager.
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url.Path = ""
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url.Fragment = ""
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url.Host = fmt.Sprintf("%s:%d", url.Hostname(), developmentWebInterfacePort)
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origins[i] = url.String()
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}
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log.Debug().Str("origins", strings.Join(origins, " ")).Msg("acceptable CORS origins")
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return origins
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}
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// randomDelayMiddleware sleeps for a random period of time, as a development tool for frontend work.
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func randomDelayMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
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return func(c echo.Context) error {
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err := next(c)
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// Delay the response a bit.
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var duration int64 = int64(rand.NormFloat64()*250 + 125) // in msec
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if duration > 0 {
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if duration > 1000 {
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duration = 1000 // Cap at one second.
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}
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time.Sleep(time.Duration(duration) * time.Millisecond)
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}
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return err
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}
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}
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func registerOAPIBodyDecoders() {
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// Register "decoders" so that binary data other than
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// "application/octet-stream" can be handled by our OpenAPI library.
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openapi3filter.RegisterBodyDecoder("image/jpeg", openapi3filter.FileBodyDecoder)
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openapi3filter.RegisterBodyDecoder("image/png", openapi3filter.FileBodyDecoder)
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}
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func logURLs(urls []url.URL) {
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log.Info().Int("count", len(urls)).Msg("possble URL at which to reach Flamenco Manager")
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for _, url := range urls {
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269
cmd/flamenco-manager/webservice.go
Normal file
269
cmd/flamenco-manager/webservice.go
Normal file
@ -0,0 +1,269 @@
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package main
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import (
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"context"
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"errors"
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"fmt"
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"math/rand"
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"net/http"
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http_pprof "net/http/pprof"
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"net/url"
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"runtime/pprof"
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"strings"
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"time"
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"github.com/getkin/kin-openapi/openapi3filter"
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"github.com/labstack/echo/v4"
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"github.com/labstack/echo/v4/middleware"
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"github.com/rs/zerolog"
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"github.com/rs/zerolog/log"
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"github.com/ziflex/lecho/v3"
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"git.blender.org/flamenco/internal/manager/api_impl"
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"git.blender.org/flamenco/internal/manager/local_storage"
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"git.blender.org/flamenco/internal/manager/swagger_ui"
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"git.blender.org/flamenco/internal/manager/webupdates"
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"git.blender.org/flamenco/internal/upnp_ssdp"
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"git.blender.org/flamenco/pkg/api"
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"git.blender.org/flamenco/web"
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)
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func buildWebService(
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flamenco api.ServerInterface,
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persist api_impl.PersistenceService,
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ssdp *upnp_ssdp.Server,
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webUpdater *webupdates.BiDirComms,
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ownURLs []url.URL,
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localStorage local_storage.StorageInfo,
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) *echo.Echo {
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e := echo.New()
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e.HideBanner = true
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e.HidePort = true
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|
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// The request should come in fairly quickly, given that Flamenco is intended
|
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// to run on a local network.
|
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e.Server.ReadHeaderTimeout = 1 * time.Second
|
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// e.Server.ReadTimeout is not set, as this is quite specific per request.
|
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// Shaman file uploads and websocket connections should be allowed to run
|
||||
// quite long, whereas other queries should be relatively short.
|
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//
|
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// See https://github.com/golang/go/issues/16100 for more info about current
|
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// limitations in Go that get in our way here.
|
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|
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// Hook Zerolog onto Echo:
|
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e.Use(lecho.Middleware(lecho.Config{
|
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Logger: lecho.From(log.Logger),
|
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}))
|
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|
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// Ensure panics when serving a web request won't bring down the server.
|
||||
e.Use(middleware.Recover())
|
||||
|
||||
// For development of the web interface, to get a less predictable order of asynchronous requests.
|
||||
if cliArgs.delayResponses {
|
||||
e.Use(randomDelayMiddleware)
|
||||
}
|
||||
|
||||
// Disabled, as it causes issues with "204 No Content" responses.
|
||||
// TODO: investigate & file a bug report. Adding the check on an empty slice
|
||||
// seems to fix it:
|
||||
//
|
||||
// func (w *gzipResponseWriter) Write(b []byte) (int, error) {
|
||||
// if len(b) == 0 {
|
||||
// return 0, nil
|
||||
// }
|
||||
// ... original code of the function ...
|
||||
// }
|
||||
// e.Use(middleware.Gzip())
|
||||
|
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e.Use(middleware.CORSWithConfig(middleware.CORSConfig{
|
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AllowOrigins: corsOrigins(ownURLs),
|
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|
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// List taken from https://www.bacancytechnology.com/blog/real-time-chat-application-using-socketio-golang-vuejs/
|
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AllowHeaders: []string{
|
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echo.HeaderAccept,
|
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echo.HeaderAcceptEncoding,
|
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echo.HeaderAccessControlAllowOrigin,
|
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echo.HeaderAccessControlRequestHeaders,
|
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echo.HeaderAccessControlRequestMethod,
|
||||
echo.HeaderAuthorization,
|
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echo.HeaderContentLength,
|
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echo.HeaderContentType,
|
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echo.HeaderOrigin,
|
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echo.HeaderXCSRFToken,
|
||||
echo.HeaderXRequestedWith,
|
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"Cache-Control",
|
||||
"Connection",
|
||||
"Host",
|
||||
"Referer",
|
||||
"User-Agent",
|
||||
"X-header",
|
||||
},
|
||||
AllowMethods: []string{"POST", "GET", "OPTIONS", "PUT", "DELETE"},
|
||||
}))
|
||||
|
||||
// Load the API definition and enable validation & authentication checks.
|
||||
swagger, err := api.GetSwagger()
|
||||
if err != nil {
|
||||
log.Fatal().Err(err).Msg("unable to get swagger")
|
||||
}
|
||||
validator := api_impl.SwaggerValidator(swagger, persist)
|
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e.Use(validator)
|
||||
registerOAPIBodyDecoders()
|
||||
|
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// Register routes.
|
||||
api.RegisterHandlers(e, flamenco)
|
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webUpdater.RegisterHandlers(e)
|
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swagger_ui.RegisterSwaggerUIStaticFiles(e)
|
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e.GET("/api/v3/openapi3.json", func(c echo.Context) error {
|
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return c.JSON(http.StatusOK, swagger)
|
||||
})
|
||||
|
||||
// Serve UPnP service descriptions.
|
||||
if ssdp != nil {
|
||||
e.GET(ssdp.DescriptionPath(), func(c echo.Context) error {
|
||||
return c.XMLPretty(http.StatusOK, ssdp.Description(), " ")
|
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})
|
||||
}
|
||||
|
||||
// Serve static files for the webapp on /app/.
|
||||
webAppHandler, err := web.WebAppHandler(webappEntryPoint)
|
||||
if err != nil {
|
||||
log.Fatal().Err(err).Msg("unable to set up HTTP server for embedded web app")
|
||||
}
|
||||
e.GET("/app/*", echo.WrapHandler(http.StripPrefix("/app", webAppHandler)))
|
||||
e.GET("/app", func(c echo.Context) error {
|
||||
return c.Redirect(http.StatusTemporaryRedirect, "/app/")
|
||||
})
|
||||
|
||||
// Serve the Blender add-on. It's contained in the static files of the webapp.
|
||||
e.GET("/flamenco3-addon.zip", echo.WrapHandler(webAppHandler))
|
||||
// The favicons are also in the static files of the webapp.
|
||||
e.GET("/favicon.png", echo.WrapHandler(webAppHandler))
|
||||
e.GET("/favicon.ico", echo.WrapHandler(webAppHandler))
|
||||
|
||||
// Serve job-specific files (last-rendered image, task logs) directly from disk.
|
||||
log.Info().
|
||||
Str("onDisk", localStorage.Root()).
|
||||
Str("url", api_impl.JobFilesURLPrefix).
|
||||
Msg("serving job-specific files directly from disk")
|
||||
e.Static(api_impl.JobFilesURLPrefix, localStorage.Root())
|
||||
|
||||
// Redirect / to the webapp.
|
||||
e.GET("/", func(c echo.Context) error {
|
||||
return c.Redirect(http.StatusTemporaryRedirect, "/app/")
|
||||
})
|
||||
|
||||
// Register profiler functions.
|
||||
if cliArgs.pprof {
|
||||
e.GET("/debug/pprof/", echo.WrapHandler(http.HandlerFunc(http_pprof.Index)))
|
||||
e.GET("/debug/pprof/cmdline", echo.WrapHandler(http.HandlerFunc(http_pprof.Cmdline)))
|
||||
e.GET("/debug/pprof/profile", echo.WrapHandler(http.HandlerFunc(http_pprof.Profile)))
|
||||
e.GET("/debug/pprof/symbol", echo.WrapHandler(http.HandlerFunc(http_pprof.Symbol)))
|
||||
e.GET("/debug/pprof/trace", echo.WrapHandler(http.HandlerFunc(http_pprof.Trace)))
|
||||
for _, profile := range pprof.Profiles() {
|
||||
name := profile.Name()
|
||||
e.GET("/debug/pprof/"+name, echo.WrapHandler(http_pprof.Handler(name)))
|
||||
}
|
||||
log.Info().Msg("profiler debugging info available on /debug/pprof/")
|
||||
}
|
||||
|
||||
// Log available routes
|
||||
routeLogger := log.Level(zerolog.TraceLevel)
|
||||
routeLogger.Trace().Msg("available routes:")
|
||||
for _, route := range e.Routes() {
|
||||
routeLogger.Trace().Msgf("%7s %s", route.Method, route.Path)
|
||||
}
|
||||
|
||||
return e
|
||||
}
|
||||
|
||||
// runWebService runs the Echo server, shutting it down when the context closes.
|
||||
// If there was any other error, it is returned and the entire server should go down.
|
||||
func runWebService(ctx context.Context, e *echo.Echo, listen string) error {
|
||||
serverStopped := make(chan struct{})
|
||||
var httpStartErr error = nil
|
||||
var httpShutdownErr error = nil
|
||||
|
||||
go func() {
|
||||
defer close(serverStopped)
|
||||
err := e.Start(listen)
|
||||
if err == http.ErrServerClosed {
|
||||
log.Info().Msg("HTTP server shut down")
|
||||
} else {
|
||||
log.Warn().Err(err).Msg("HTTP server unexpectedly shut down")
|
||||
httpStartErr = err
|
||||
}
|
||||
}()
|
||||
|
||||
select {
|
||||
case <-ctx.Done():
|
||||
log.Info().Msg("HTTP server stopping because application is shutting down")
|
||||
|
||||
// Do a clean shutdown of the HTTP server.
|
||||
err := e.Shutdown(context.Background())
|
||||
if err != nil {
|
||||
log.Error().Err(err).Msg("error shutting down HTTP server")
|
||||
httpShutdownErr = err
|
||||
}
|
||||
|
||||
// Wait until the above goroutine has stopped.
|
||||
<-serverStopped
|
||||
|
||||
// Return any error that occurred.
|
||||
if httpStartErr != nil {
|
||||
return httpStartErr
|
||||
}
|
||||
return httpShutdownErr
|
||||
|
||||
case <-serverStopped:
|
||||
// The HTTP server stopped before the application shutdown was signalled.
|
||||
// This is unexpected, so take the entire application down with us.
|
||||
if httpStartErr != nil {
|
||||
return httpStartErr
|
||||
}
|
||||
return errors.New("unexpected and unexplained shutdown of HTTP server")
|
||||
}
|
||||
}
|
||||
|
||||
// corsOrigins strips everything from the URL that follows the hostname:port, so
|
||||
// that it's suitable for checking Origin headers of CORS OPTIONS requests.
|
||||
func corsOrigins(urls []url.URL) []string {
|
||||
origins := make([]string, len(urls))
|
||||
|
||||
// TODO: find a way to allow CORS requests during development, but not when
|
||||
// running in production.
|
||||
|
||||
for i, url := range urls {
|
||||
// Allow the `yarn run dev` webserver do cross-origin requests to this Manager.
|
||||
url.Path = ""
|
||||
url.Fragment = ""
|
||||
url.Host = fmt.Sprintf("%s:%d", url.Hostname(), developmentWebInterfacePort)
|
||||
origins[i] = url.String()
|
||||
}
|
||||
log.Debug().Str("origins", strings.Join(origins, " ")).Msg("acceptable CORS origins")
|
||||
return origins
|
||||
}
|
||||
|
||||
// randomDelayMiddleware sleeps for a random period of time, as a development tool for frontend work.
|
||||
func randomDelayMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
|
||||
return func(c echo.Context) error {
|
||||
err := next(c)
|
||||
|
||||
// Delay the response a bit.
|
||||
var duration int64 = int64(rand.NormFloat64()*250 + 125) // in msec
|
||||
if duration > 0 {
|
||||
if duration > 1000 {
|
||||
duration = 1000 // Cap at one second.
|
||||
}
|
||||
time.Sleep(time.Duration(duration) * time.Millisecond)
|
||||
}
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
func registerOAPIBodyDecoders() {
|
||||
// Register "decoders" so that binary data other than
|
||||
// "application/octet-stream" can be handled by our OpenAPI library.
|
||||
openapi3filter.RegisterBodyDecoder("image/jpeg", openapi3filter.FileBodyDecoder)
|
||||
openapi3filter.RegisterBodyDecoder("image/png", openapi3filter.FileBodyDecoder)
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user