fix removing double slash prefix in raw req path

v2/pkg/protocols/http/raw/raw.go

@@ -32,6 +32,18 @@ func Parse(request string, inputURL *urlutil.URL, unsafe, disablePathAutomerge b
 		return nil, err
 	}
 
+	// edge case for double slash in path
+	// uri part in raw req '//CFIDE/wizards/common/utils.cfc' (valid uri without scheme)
+	// for ^ex url.Parse results in scheme="",host="CFIDE",path="/wizards/common/utils.cfc"
+	startWithDoubleSlash := strings.HasPrefix(rawrequest.Path, "//")
+	_, hasHost := rawrequest.Headers["Host"]
+	var pathPrefix string
+	if startWithDoubleSlash && hasHost {
+		if u, err := urlutil.Parse(rawrequest.Path); err == nil && u.Host != "" {
+			pathPrefix = "//" + u.Host
+		}
+	}
+
 	switch {
 	// If path is empty do not tamper input url (see doc)
 	// can be omitted but makes things clear
@@ -83,7 +95,7 @@ func Parse(request string, inputURL *urlutil.URL, unsafe, disablePathAutomerge b
 			}
 			unsafeRelativePath = cloned.GetRelativePath()
 		}
-		rawrequest.Path = cloned.GetRelativePath()
+		rawrequest.Path = pathPrefix + cloned.GetRelativePath()
 		rawrequest.UnsafeRawBytes = bytes.Replace(rawrequest.UnsafeRawBytes, []byte(prevPath), []byte(unsafeRelativePath), 1)
 
 	default:
@@ -95,7 +107,7 @@ func Parse(request string, inputURL *urlutil.URL, unsafe, disablePathAutomerge b
 		if parseErr != nil {
 			return nil, errorutil.NewWithTag("raw", "could not automergepath for template path %v", rawrequest.Path).Wrap(parseErr)
 		}
-		rawrequest.Path = cloned.GetRelativePath()
+		rawrequest.Path = pathPrefix + cloned.GetRelativePath()
 	}
 
 	if !unsafe {