130 lines
3.5 KiB
Go
130 lines
3.5 KiB
Go
// Command stepd provides an HTTP server that automatically executes STEP files.
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package main
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import "os"
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import "log"
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import "time"
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import "errors"
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import "context"
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import "net/http"
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import "git.tebibyte.media/sashakoshka/step"
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import "git.tebibyte.media/sashakoshka/go-cli"
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import "git.tebibyte.media/sashakoshka/step/providers"
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import "git.tebibyte.media/sashakoshka/goutil/container"
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import "git.tebibyte.media/sashakoshka/go-service/daemon"
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import stephttp"git.tebibyte.media/sashakoshka/step/http"
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import "git.tebibyte.media/sashakoshka/go-service/routines"
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func main () {
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// parse command line arguments
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flagPidFile := cli.NewInputFlag (
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'p', "pid-file",
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"Write the PID to the specified file.",
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"", cli.ValString)
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flagAddress := cli.NewInputFlag (
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'a', "address",
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"The address to host the server on.",
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":8080", cli.ValString)
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// TODO have in conf, override here
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flagErrorDocument := cli.NewInputFlag (
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0, "error-document",
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"The document to use for displaying errors.",
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"", cli.ValString)
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// TODO have in conf, override here
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flagDirectories := cli.NewFlag (
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'd', "directories",
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"Serve the contents of directories.")
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cmd := cli.New (
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"Run an HTTP server that automaticaly executes STEP files.",
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flagPidFile,
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flagAddress,
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flagErrorDocument,
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flagDirectories,
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cli.NewHelp())
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cmd.Syntax = "[OPTIONS]... [DIRECTORY]"
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cmd.ParseOrExit(os.Args)
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log.Println(`==========| STEP |===========`)
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log.Println(`Scriptable Template Processor`)
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log.Println(`... initializing`)
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// the single argument is for the directory to serve. we actually cd
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// there.
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if len(cmd.Args) == 1 {
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err := os.Chdir(cmd.Args[0])
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if err != nil { log.Fatalln("XXX", err) }
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} else if len(cmd.Args) > 1 {
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cmd.Usage()
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os.Exit(1)
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}
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// set up the environment
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environment := step.Environment { }
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environment.FuncProviders = providers.All()
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err := environment.Init(context.Background())
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if err != nil { log.Fatal(err) }
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// set up the HTTP handler
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handler := stephttp.Handler {
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Environment: &environment,
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Directories: flagDirectories.Value == "true",
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StepExt: ucontainer.NewSet(".step"),
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Index: []string { "index.step", "index.html", "index" },
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ErrorDocument: flagErrorDocument.Value,
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}
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// set up the HTTP server
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httpServer := http.Server {
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Addr: flagAddress.Value,
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Handler: &handler,
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}
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// set up the routine manager
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httpServerRoutine := httpServerRoutine(httpServer)
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manager := routines.Manager {
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Routines: []routines.Routine {
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&httpServerRoutine,
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},
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}
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log.Println(`.// initialized.`)
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// be a daemon
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ctx, done := context.WithCancel(context.Background())
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daemon.OnSigint(done)
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pidfile := daemon.PidFile(flagPidFile.Value)
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if !pidfile.Empty() {
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err := pidfile.Start()
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if err != nil { log.Println("!!! could not write pid:", err) }
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defer func () {
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err := pidfile.Close()
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if err != nil { log.Println("!!! could not delete pidfile:", err) }
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} ()
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}
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log.Printf("(i) listening on %s\n", httpServer.Addr)
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if err := manager.Run(ctx); err != nil && !errors.Is(err, context.Canceled) {
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log.Fatalln("XXX", err)
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}
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}
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type httpServerRoutine http.Server
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func (this *httpServerRoutine) Run (ctx context.Context) error {
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ctx, done := context.WithCancel(ctx)
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defer done()
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server := http.Server(*this)
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go func () {
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<- ctx.Done()
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shutdownCtx, _ := context.WithTimeout (
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context.Background(),
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16 * time.Second)
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server.Shutdown(shutdownCtx)
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} ()
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err := server.ListenAndServe()
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if ctx.Err() != nil {
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return ctx.Err()
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}
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return err
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}
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