111 lines
2.5 KiB
Go
111 lines
2.5 KiB
Go
package web
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import (
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"fmt"
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"log"
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"net/http"
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"os"
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"path"
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"path/filepath"
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"sync"
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"github.com/gorilla/mux"
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)
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// RoutedService defines the interface that is needed for any service to
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// register themself in the web server to provide new endpoints. (see
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// AddRoutes).
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type RoutedService interface {
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RegisterRoutes(*mux.Router)
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}
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// Server is the structure responsible for managing our http web server.
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type Server struct {
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http.Server
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rootPath string
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port int
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ssl bool
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localOnly bool
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}
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// NewServer creates a new instance of the webserver.
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func NewServer(rootPath string, port int, ssl bool, localOnly bool) *Server {
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r := mux.NewRouter()
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var addr string
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if localOnly {
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addr = fmt.Sprintf(`localhost:%d`, port)
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} else {
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addr = fmt.Sprintf(`:%d`, port)
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}
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ws := &Server{
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Server: http.Server{
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Addr: addr,
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Handler: r,
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},
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rootPath: rootPath,
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port: port,
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ssl: ssl,
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}
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return ws
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}
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func (ws *Server) Router() *mux.Router {
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return ws.Server.Handler.(*mux.Router)
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}
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// AddRoutes allows services to register themself in the webserver router and provide new endpoints.
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func (ws *Server) AddRoutes(rs RoutedService) {
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rs.RegisterRoutes(ws.Router())
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}
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func (ws *Server) registerRoutes() {
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ws.Router().PathPrefix("/static").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(filepath.Join(ws.rootPath, "static")))))
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ws.Router().PathPrefix("/").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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http.ServeFile(w, r, path.Join(ws.rootPath, "index.html"))
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})
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}
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// Start runs the web server and start listening for charsetnnections.
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func (ws *Server) Start(wg *sync.WaitGroup) {
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ws.registerRoutes()
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isSSL := ws.ssl && fileExists("./cert/cert.pem") && fileExists("./cert/key.pem")
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if isSSL {
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log.Printf("https server started on :%d\n", ws.port)
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go func() {
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defer wg.Done()
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if err := ws.ListenAndServeTLS("./cert/cert.pem", "./cert/key.pem"); err != nil {
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log.Fatalf("ListenAndServeTLS: %v", err)
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}
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}()
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return
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}
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log.Printf("http server started on :%d\n", ws.port)
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go func() {
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defer wg.Done()
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if err := ws.ListenAndServe(); err != http.ErrServerClosed {
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log.Fatalf("ListenAndServe: %v", err)
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}
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}()
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}
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func (ws *Server) Shutdown() error {
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return ws.Close()
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}
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// fileExists returns true if a file exists at the path.
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func fileExists(path string) bool {
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_, err := os.Stat(path)
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if os.IsNotExist(err) {
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return false
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}
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return err == nil
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}
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