Split code to more files. Mainly move processor code to its own file.

cmd/csaf_checker/util.go

@@ -0,0 +1,46 @@
+// This file is Free Software under the MIT License
+// without warranty, see README.md and LICENSES/MIT.txt for details.
+//
+// SPDX-License-Identifier: MIT
+//
+// SPDX-FileCopyrightText: 2021 German Federal Office for Information Security (BSI) <https://www.bsi.bund.de>
+// Software-Engineering: 2021 Intevation GmbH <https://intevation.de>
+
+package main
+
+import (
+	"bufio"
+	"encoding/hex"
+	"io"
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+var hexRe = regexp.MustCompile(`^([[:xdigit:]]+)`)
+
+func hashFromReader(r io.Reader) ([]byte, error) {
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		if m := hexRe.FindStringSubmatch(scanner.Text()); m != nil {
+			return hex.DecodeString(m[1])
+		}
+	}
+	return nil, scanner.Err()
+}
+
+func basePath(p string) (string, error) {
+	u, err := url.Parse(p)
+	if err != nil {
+		return "", err
+	}
+	ep := u.EscapedPath()
+	if idx := strings.LastIndexByte(ep, '/'); idx != -1 {
+		ep = ep[:idx]
+	}
+	user := u.User.String()
+	if user != "" {
+		user += "@"
+	}
+	return u.Scheme + "://" + user + u.Host + "/" + ep, nil
+}