pass a struct with the info

Former-commit-id: 6f9843613e6abfe0b19e6e43f9299afb98645477 [formerly 805fa39b073401c946b559e0e967fdc553f16295] [formerly f9e2de337abc0cbeb5ccdb8b6962871b0bd3ee0e [formerly 1d26b8e95e73a94ba92673861c4e83dfded0d92e]]
Former-commit-id: 259a1ba8cdc71e7d32add58f9487e5827aa6685e [formerly 161a1a49bc1158f11f07fc9ff638506dafb6c918]
Former-commit-id: 67fe1fef4602baf4ddae40b28e65ac9a2a42ca9d

checksum.go

@@ -14,10 +14,10 @@ import (
 )
 
 // checksum calculates the hash of a file. Supports MD5, SHA1, SHA256 and SHA512.
-func checksum(w http.ResponseWriter, r *http.Request, i *fileInfo) (int, error) {
+func checksum(ctx *requestContext, w http.ResponseWriter, r *http.Request) (int, error) {
 	query := r.URL.Query().Get("checksum")
 
-	file, err := os.Open(i.Path)
+	file, err := os.Open(ctx.Info.Path)
 	if err != nil {
 		return errorToHTTP(err, true), err
 	}