From 13b0cc6b833f458b2ce8a6f5eb56e24f45e2eed1 Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Sat, 28 May 2011 18:31:24 -0400
Subject: [PATCH] Add backend support for downloading files

---
 src/paths.go  |  6 ++++++
 src/server.go | 12 ++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/paths.go b/src/paths.go
index 617d5a9..522b3f6 100644
--- a/src/paths.go
+++ b/src/paths.go
@@ -41,6 +41,12 @@ func checkInJail(the_path string) bool {
 	return true
 }
 
+func IsValid(path string) (bool, string) {
+	path = canonicalizePath(path)
+	_, err := os.Lstat(path)
+	return err == nil && checkInJail(path), path
+}
+
 func List(the_path string) (files vector.StringVector, err os.Error) {
 	full_path := canonicalizePath(the_path)
 	if !checkInJail(full_path) {
diff --git a/src/server.go b/src/server.go
index 8d8adf3..3ff4705 100644
--- a/src/server.go
+++ b/src/server.go
@@ -84,6 +84,18 @@ func serviceHandler(response http.ResponseWriter, request *http.Request) {
 			}
 			okResponse(response, data)
 		}
+	case "download":
+		valid, fullPath := paths.IsValid(request.FormValue("path"))
+		if valid {
+			info, _ := os.Lstat(fullPath)  // Error is already checked by |valid|.
+			if info.IsDirectory() {
+				errorResponse(response, "File is a directory")
+				return
+			}
+			http.ServeFile(response, request, fullPath)
+		} else {
+			errorResponse(response, "Invalid path")
+		}
 	default:
 		fmt.Printf("Invalid action: '%s'\n", request.FormValue("action"))
 		errorResponse(response, "Unhandled action")
-- 
2.22.5