112 lines
2.8 KiB
Go
112 lines
2.8 KiB
Go
// Copyright 2018 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package validation
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import (
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"net"
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"net/url"
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"regexp"
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"strings"
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"code.gitea.io/gitea/modules/setting"
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)
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var externalTrackerRegex = regexp.MustCompile(`({?)(?:user|repo|index)+?(}?)`)
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func isLoopbackIP(ip string) bool {
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return net.ParseIP(ip).IsLoopback()
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}
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// IsValidURL checks if URL is valid
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func IsValidURL(uri string) bool {
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if u, err := url.ParseRequestURI(uri); err != nil ||
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(u.Scheme != "http" && u.Scheme != "https") ||
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!validPort(portOnly(u.Host)) {
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return false
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}
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return true
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}
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// IsValidSiteURL checks if URL is valid
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func IsValidSiteURL(uri string) bool {
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u, err := url.ParseRequestURI(uri)
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if err != nil {
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return false
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}
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if !validPort(portOnly(u.Host)) {
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return false
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}
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for _, scheme := range setting.Service.ValidSiteURLSchemes {
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if scheme == u.Scheme {
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return true
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}
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}
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return false
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}
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// IsAPIURL checks if URL is current Gitea instance API URL
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func IsAPIURL(uri string) bool {
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return strings.HasPrefix(strings.ToLower(uri), strings.ToLower(setting.AppURL+"api"))
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}
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// IsValidExternalURL checks if URL is valid external URL
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func IsValidExternalURL(uri string) bool {
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if !IsValidURL(uri) || IsAPIURL(uri) {
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return false
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}
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u, err := url.ParseRequestURI(uri)
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if err != nil {
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return false
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}
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// Currently check only if not loopback IP is provided to keep compatibility
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if isLoopbackIP(u.Hostname()) || strings.ToLower(u.Hostname()) == "localhost" {
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return false
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}
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// TODO: Later it should be added to allow local network IP addresses
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// only if allowed by special setting
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return true
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}
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// IsValidExternalTrackerURLFormat checks if URL matches required syntax for external trackers
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func IsValidExternalTrackerURLFormat(uri string) bool {
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if !IsValidExternalURL(uri) {
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return false
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}
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// check for typoed variables like /{index/ or /[repo}
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for _, match := range externalTrackerRegex.FindAllStringSubmatch(uri, -1) {
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if (match[1] == "{" || match[2] == "}") && (match[1] != "{" || match[2] != "}") {
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return false
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}
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}
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return true
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}
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var (
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validUsernamePatternWithDots = regexp.MustCompile(`^[\da-zA-Z][-.\w]*$`)
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validUsernamePatternWithoutDots = regexp.MustCompile(`^[\da-zA-Z][-\w]*$`)
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// No consecutive or trailing non-alphanumeric chars, catches both cases
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invalidUsernamePattern = regexp.MustCompile(`[-._]{2,}|[-._]$`)
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)
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// IsValidUsername checks if username is valid
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func IsValidUsername(name string) bool {
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// It is difficult to find a single pattern that is both readable and effective,
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// but it's easier to use positive and negative checks.
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if setting.Service.AllowDotsInUsernames {
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return validUsernamePatternWithDots.MatchString(name) && !invalidUsernamePattern.MatchString(name)
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}
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return validUsernamePatternWithoutDots.MatchString(name) && !invalidUsernamePattern.MatchString(name)
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}
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