Add Sandstorm packaging files (#26)

I am not quite done here, I need to finish some of the packaging metadata, and I am going to maybe take a pass at permissions prior to release. Opening the pull request so you can easily track the progress.

Note that Sandstorm app metadata is supposed to be less than 1 MB total, so I optimized your screenshots. I dare you to tell the difference with the naked eye.

Co-authored-by: Jacob Weisz <inbox@jacobweisz.com>
Reviewed-on: https://git.mills.io/prologic/tube/pulls/26
Co-authored-by: Jacob Weisz <ocdtrekkie@noreply@mills.io>
Co-committed-by: Jacob Weisz <ocdtrekkie@noreply@mills.io>

1 files changed, 15 insertions, 0 deletions

diff --git a/app/middleware/auth.go b/app/middleware/auth.go
index 61a58e3..c023492 100644
--- a/app/middleware/auth.go
+++ b/app/middleware/auth.go
@@ -3,6 +3,7 @@ package middleware
 import (
 	"crypto/subtle"
 	"net/http"
+	"strings"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -48,3 +49,17 @@ func OptionallyRequireAdminAuth(handler http.HandlerFunc, password string) http.
 		handler(w, r)
 	}
 }
+
+func RequireSandstormPermission(handler http.HandlerFunc, permissionNeeded string) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		
+		// Failed
+		if !strings.Contains(r.Header.Get("X-Sandstorm-Permissions"), permissionNeeded) {
+			http.Error(w, "Unauthorized", http.StatusUnauthorized)
+			log.Debugln("No upload capability granted")
+			return
+		}
+		
+		handler(w, r)
+	}
+}