Add basich auth with file

Dockerfile

@@ -2,6 +2,13 @@ FROM golang:1.13.6-alpine3.11 as builder
 
 WORKDIR /go/src/app
 
+# Copy go mod and sum files
+COPY go.mod go.sum ./
+
+# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
+RUN go mod download
+
+# Copy the source from the current directory to the Working Directory inside the container
 COPY . .
 
 # There is a roblem with net lib bindings and CGO_ENABLED is needed
@@ -18,6 +25,9 @@ WORKDIR /app
 
 EXPOSE 8100
 
+ARG HTPASSWD_FILE
+ENV HTPASSWD_FILE ${HTPASSWD_FILE:-""}
+
 ENTRYPOINT ["/app/server"]
 CMD ["-p", "8100", "-d", "/files"]
 

go.mod

@@ -0,0 +1,9 @@
+module github.com/maguilag/file-qrs
+
+go 1.13
+
+require (
+	github.com/abbot/go-http-auth v0.4.0 // indirect
+	golang.org/x/crypto v0.0.0-20200117160349-530e935923ad // indirect
+	golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa // indirect
+)

go.sum

@@ -0,0 +1,11 @@
+github.com/abbot/go-http-auth v0.4.0 h1:QjmvZ5gSC7jm3Zg54DqWE/T5m1t2AfDu6QlXJT0EVT0=
+github.com/abbot/go-http-auth v0.4.0/go.mod h1:Cz6ARTIzApMJDzh5bRMSUou6UMSp0IEXg9km/ci7TJM=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20200117160349-530e935923ad h1:Jh8cai0fqIK+f6nG0UgPW5wFk8wmiMhM3AyciDBdtQg=
+golang.org/x/crypto v0.0.0-20200117160349-530e935923ad/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa h1:F+8P+gmewFQYRk6JoLQLwjBCTu3mcIURZfNkVweuRKA=
+golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

server.go

@@ -10,6 +10,7 @@ package main
 
 import (
 	"flag"
+	auth "github.com/abbot/go-http-auth"
 	"html/template"
 	"io/ioutil"
 	"log"
@@ -30,12 +31,24 @@ func main() {
 	ss := http.FileServer(http.Dir("statics"))
 	http.Handle("/statics/", http.StripPrefix("/statics/", ss))
 
-	http.HandleFunc("/", serveTemplate)
+	htppasswd := os.Getenv("HTPASSWD_FILE")
+	if htppasswd == "" {
+		http.HandleFunc("/", serveTemplate)
+	} else {
+		log.Printf("Using '%s' http basic auth file\n", htppasswd)
+		h := auth.HtpasswdFileProvider(htppasswd)
+		a := auth.NewBasicAuthenticator("File-qrs Realm", h)
+		http.Handle("/", a.Wrap(serveAuthTemplate))
+	}
 
 	log.Printf("Serving %s on HTTP port: %s\n", *directory, *port)
 	log.Fatal(http.ListenAndServe(":"+*port, nil))
 }
 
+func serveAuthTemplate(w http.ResponseWriter, ar *auth.AuthenticatedRequest) {
+	serveTemplate(w, &ar.Request)
+}
+
 func serveTemplate(w http.ResponseWriter, r *http.Request) {
 	var template_name string
 	if template_name = filepath.Clean(r.URL.Path); template_name == "/" {
@@ -64,6 +77,6 @@ func IOReadDir(root string) ([]string, error) {
 
 	for _, file := range fileInfo {
 		files = append(files, file.Name())
-		}
+	}
 	return files, nil
 }