72 lines
2.4 KiB
Go
72 lines
2.4 KiB
Go
// Copyright 2018 hybris. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE.md file.
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package serve
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import (
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"os"
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"net"
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"errors"
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"strings"
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"path/filepath"
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"github.com/kpango/glg"
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)
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// ValidatePath validates if the path exists and returns the full absolute path of the given path.
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// if no path was provided (e.g. empty string), it will return the current working directory.
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// exit with error if path is not valid or does not exist
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func validatePath(path_tainted string) (string, error) {
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if path_tainted == "" {
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glg.Info("no directory specified, serving current working directory")
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return filepath.Abs(filepath.Dir(os.Args[0]))
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}
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if _, err := os.Stat(path_tainted); os.IsNotExist(err) {
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glg.Errorf("file or directory does not exist: %s",path_tainted)
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return "", err
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}
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if filepath.IsAbs(path_tainted) {
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return path_tainted, nil
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}
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return filepath.Abs(path_tainted)
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}
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// ValidateAddress will check if a provided string is a valid ipv4/6 address and return it as string.
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// if will return ipv6 addresses with surrounding brackets.(Example: "::" => "[::]")
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func validateAddress(address_tainted string) (string, error) {
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if address_tainted == "" {
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return "", nil
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}
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var address = net.ParseIP(address_tainted)
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if address == nil {
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glg.Errorf("%s is not a valid ipv4 or ipv6 address",address_tainted)
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return "", errors.New("not a valid ipv4 or ipv6 address")
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}
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if (address.To4() == nil) {
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return strings.Join([]string{"[","]"},address.String()), nil
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}
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return address.String(), nil
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}
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// ValidatePort will check if a given port is in valid port range.
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// returns the input if port is valid
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// exits with errror if port is out of range, or port <1024 is called without priviliges
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func validatePort(port_tainted int) (int, error) {
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if(port_tainted < 0 || port_tainted > 65535) {
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glg.Errorf("port %d is invalid, please provide a port in range 0-65535",port_tainted)
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return 0, errors.New("Port is out of range, please provide a port in range 0-65535")
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}
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if(os.Geteuid() != 0 && port_tainted < 1024) {
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glg.Errorf("cannot bind to port %d without root priviliges",port_tainted)
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return 0, errors.New("Ports below 1024 can only be bind by root. You are not root.")
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}
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return port_tainted, nil
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}
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