115 lines
3 KiB
Go
115 lines
3 KiB
Go
package cmd
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import (
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"net"
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"net/http"
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wisski_distillery "github.com/FAU-CDI/wisski-distillery"
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"github.com/FAU-CDI/wisski-distillery/internal/cli"
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"github.com/rs/zerolog"
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"github.com/tkw1536/goprogram/exit"
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"github.com/tkw1536/pkglib/errorx"
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)
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// Server is the 'server' command
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var Server wisski_distillery.Command = server{}
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type server struct {
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Trigger bool `short:"t" long:"trigger" description:"instead of running on the existing server, simply trigger a cron run"`
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Bind string `short:"b" long:"bind" description:"address to listen on" default:"127.0.0.1:8888"`
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InternalBind string `short:"i" long:"internal-bind" description:"address to listen on for internal server" default:"127.0.0.1:9999"`
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}
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func (s server) Description() wisski_distillery.Description {
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return wisski_distillery.Description{
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Requirements: cli.Requirements{
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NeedsDistillery: true,
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},
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Command: "server",
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Description: "starts a server with information about this distillery",
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}
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}
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var errServerListen = exit.Error{
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ExitCode: exit.ExitGeneric,
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Message: "unable to listen",
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}
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var errServerTrigger = exit.Error{
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Message: "failed to trigger",
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ExitCode: exit.ExitGeneric,
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}
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var errServerGeneric = exit.Error{
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ExitCode: exit.ExitGeneric,
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Message: "unable to instantiate server",
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}
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func (s server) Run(context wisski_distillery.Context) error {
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dis := context.Environment
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// if the caller requested a trigger, just trigger the cron tasks
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if s.Trigger {
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if err := dis.Control().Trigger(context.Context); err != nil {
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return errServerTrigger.Wrap(err)
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}
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}
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{
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// create a channel for notifications
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notify, cancel := dis.Cron().Listen(context.Context)
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defer cancel()
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// start the cron tasks
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done := dis.Cron().Start(context.Context, notify)
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defer func() {
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<-done
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}()
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}
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// and start the server
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public, internal, err := dis.Control().Server(context.Context, context.Stderr)
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if err != nil {
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return errServerGeneric.Wrap(err)
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}
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// start the public listener
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publicS := http.Server{Handler: public}
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publicC := make(chan error)
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{
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zerolog.Ctx(context.Context).Info().Str("bind", s.Bind).Msg("listening public server")
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publicL, err := net.Listen("tcp", s.Bind)
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if err != nil {
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return errServerListen.Wrap(err)
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}
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defer publicS.Shutdown(context.Context)
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go func() {
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publicC <- publicS.Serve(publicL)
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}()
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}
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// start the internal listener
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internalS := http.Server{Handler: internal}
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internalC := make(chan error)
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{
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zerolog.Ctx(context.Context).Info().Str("bind", s.InternalBind).Msg("listening internal server")
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internalL, err := net.Listen("tcp", s.InternalBind)
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if err != nil {
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return errServerListen.Wrap(err)
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}
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defer internalS.Shutdown(context.Context)
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go func() {
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internalC <- internalS.Serve(internalL)
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}()
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}
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go func() {
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<-context.Context.Done()
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zerolog.Ctx(context.Context).Info().Msg("shutting down server")
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publicS.Shutdown(context.Context)
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internalS.Shutdown(context.Context)
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}()
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return errServerListen.Wrap(errorx.First(<-internalC, <-publicC, err))
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}
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