First implementation of firebase auth

cmd/frontend/firebase.go

@@ -0,0 +1,45 @@
+package frontend
+
+import (
+	"log"
+	"net/http"
+	"strings"
+
+	b "streifling.com/jason/cpolis/cmd/backend"
+)
+
+func ServePDFs(c *b.Config) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		idToken := r.Header.Get("Authorization")
+		if idToken == "" {
+			http.Error(w, "Authorization header missing", http.StatusUnauthorized)
+		}
+
+		client, err := b.NewClient()
+		if err != nil {
+			log.Println(err)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		_, err = client.Verify(idToken)
+		if err != nil {
+			log.Println(err)
+			http.Error(w, err.Error(), http.StatusUnauthorized)
+			return
+		}
+
+		pdfIDsString := r.PathValue("ids")
+		if err != nil {
+			log.Println(err)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		pdfIDs := strings.Split(pdfIDsString, ",")
+
+		for _, id := range pdfIDs {
+			http.ServeFile(w, r, id)
+		}
+	}
+}