ots/main.go

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package main
//go:generate go-bindata -pkg $GOPACKAGE -o assets.go ./frontend/...
import (
"fmt"
"mime"
"net/http"
"os"
"path"
"strings"
"text/template"
http_helpers "github.com/Luzifer/go_helpers/http"
"github.com/Luzifer/rconfig"
"github.com/gorilla/mux"
log "github.com/sirupsen/logrus"
)
var (
cfg struct {
Listen string `flag:"listen" default:":3000" description:"IP/Port to listen on"`
LogLevel string `flag:"log-level" default:"info" description:"Set log level (debug, info, warning, error)"`
StorageType string `flag:"storage-type" default:"mem" description:"Storage to use for putting secrets to" validate:"nonzero"`
VersionAndExit bool `flag:"version" default:"false" description:"Print version information and exit"`
}
product = "ots"
version = "dev"
)
func init() {
if err := rconfig.ParseAndValidate(&cfg); err != nil {
log.Fatalf("Error parsing CLI arguments: %s", err)
}
if l, err := log.ParseLevel(cfg.LogLevel); err == nil {
log.SetLevel(l)
} else {
log.Fatalf("Invalid log level: %s", err)
}
if cfg.VersionAndExit {
fmt.Printf("%s %s\n", product, version)
os.Exit(0)
}
}
func main() {
store, err := getStorageByType(cfg.StorageType)
if err != nil {
log.Fatalf("Could not initialize storage: %s", err)
}
api := newAPI(store)
r := mux.NewRouter()
api.Register(r.PathPrefix("/api").Subrouter())
r.PathPrefix("/").HandlerFunc(assetDelivery)
log.Fatalf("HTTP server quit: %s", http.ListenAndServe(cfg.Listen, http_helpers.NewHTTPLogHandler(r)))
}
func assetDelivery(res http.ResponseWriter, r *http.Request) {
assetName := r.URL.Path
if assetName == "/" {
assetName = "/index.html"
}
ext := assetName[strings.LastIndex(assetName, "."):]
assetData, err := Asset(path.Join("frontend", assetName))
if err != nil {
http.Error(res, "404 not found", http.StatusNotFound)
return
}
res.Header().Set("Content-Type", mime.TypeByExtension(ext))
if assetName != "/index.html" {
// Do not use template engine on other files than index.html
res.Write(assetData)
return
}
tpl, err := template.New(assetName).Funcs(getTFuncMap(r)).Parse(string(assetData))
if err != nil {
log.Errorf("Template for asset %q has an error: %s", assetName, err)
return
}
tpl.Execute(res, map[string]interface{}{
"version": version,
})
}