super-graph/serv/serv.go

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package serv
import (
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"context"
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"fmt"
"net/http"
"os"
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"os/signal"
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"strings"
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"time"
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rice "github.com/GeertJohan/go.rice"
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"github.com/NYTimes/gziphandler"
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"github.com/dosco/super-graph/psql"
"github.com/dosco/super-graph/qcode"
)
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func initCompilers(c *config) (*qcode.Compiler, *psql.Compiler, error) {
di, err := psql.GetDBInfo(db)
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if err != nil {
return nil, nil, err
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}
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if err = addForeignKeys(c, di); err != nil {
return nil, nil, err
}
schema, err = psql.NewDBSchema(db, di, c.getAliasMap())
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if err != nil {
return nil, nil, err
}
qc, err := qcode.NewCompiler(qcode.Config{
Blocklist: c.DB.Blocklist,
})
if err != nil {
return nil, nil, err
}
if err := addRoles(c, qc); err != nil {
return nil, nil, err
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}
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pc := psql.NewCompiler(psql.Config{
Schema: schema,
Vars: c.DB.Vars,
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})
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return qc, pc, nil
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}
func initWatcher(cpath string) {
if !conf.WatchAndReload {
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return
}
var d dir
if len(cpath) == 0 || cpath == "./" {
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d = Dir("./config", ReExec)
} else {
d = Dir(cpath, ReExec)
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}
go func() {
err := Do(logger.Printf, d)
if err != nil {
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errlog.Fatal().Err(err).Send()
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}
}()
}
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func startHTTP() {
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hp := strings.SplitN(conf.HostPort, ":", 2)
if len(conf.Host) != 0 {
hp[0] = conf.Host
}
if len(conf.Port) != 0 {
hp[1] = conf.Port
}
hostPort := fmt.Sprintf("%s:%s", hp[0], hp[1])
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srv := &http.Server{
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Addr: hostPort,
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Handler: routeHandler(),
ReadTimeout: 5 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
}
idleConnsClosed := make(chan struct{})
go func() {
sigint := make(chan os.Signal, 1)
signal.Notify(sigint, os.Interrupt)
<-sigint
if err := srv.Shutdown(context.Background()); err != nil {
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errlog.Error().Err(err).Msg("shutdown signal received")
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}
close(idleConnsClosed)
}()
srv.RegisterOnShutdown(func() {
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db.Close()
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})
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logger.Info().
Str("version", version).
Str("git_branch", gitBranch).
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Str("host_post", hostPort).
Str("app_name", conf.AppName).
Str("env", conf.Env).
Msgf("%s listening", serverName)
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if err := srv.ListenAndServe(); err != http.ErrServerClosed {
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errlog.Error().Err(err).Msg("server closed")
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}
<-idleConnsClosed
}
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func routeHandler() http.Handler {
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var apiH http.Handler
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if conf.HTTPGZip {
gzipH := gziphandler.MustNewGzipLevelHandler(6)
apiH = gzipH(http.HandlerFunc(apiV1))
} else {
apiH = http.HandlerFunc(apiV1)
}
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mux := http.NewServeMux()
mux.HandleFunc("/health", health)
mux.Handle("/api/v1/graphql", withAuth(apiH))
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if conf.WebUI {
mux.Handle("/", http.FileServer(rice.MustFindBox("../web/build").HTTPBox()))
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}
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fn := func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Server", serverName)
mux.ServeHTTP(w, r)
}
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return http.HandlerFunc(fn)
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}
func getConfigName() string {
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if len(os.Getenv("GO_ENV")) == 0 {
return "dev"
}
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ge := strings.ToLower(os.Getenv("GO_ENV"))
switch {
case strings.HasPrefix(ge, "pro"):
return "prod"
case strings.HasPrefix(ge, "sta"):
return "stage"
case strings.HasPrefix(ge, "tes"):
return "test"
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case strings.HasPrefix(ge, "dev"):
return "dev"
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}
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return ge
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}