mirror of
https://github.com/go-gitea/gitea.git
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silverwind
7e18e81c7d
Pure refactors with no behavior change, mostly reusing existing helpers and dropping duplicated or dead code. Net −222 lines. - Reuse existing helpers instead of inlined copies: `getIssueIndex`, `NewLabel`, `ToCommitUser`, `GetPackageFileDescriptors`, `util.SplitTrimSpace` - Merge copy-pasted blocks in review comment deletion, project deletion and the pre/post-receive hook templates - Drop dead code: an error `toStringKeys` never returned, impossible `bytes.Buffer` write errors, redundant nil-map branches, a `base64` wrapper - Use stdlib where it fits: `strings.Cut`, `bytes.IndexAny`, `cmp.Compare`, `min`/`max`, `slices.Concat`, map lookups instead of key scans
42 lines
1.3 KiB
Go
42 lines
1.3 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package markup
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import (
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"crypto/hmac"
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"crypto/sha1"
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"encoding/base64"
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"net/url"
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"strings"
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"gitea.dev/modules/setting"
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)
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// CamoEncode encodes a lnk to fit with the go-camo and camo proxy links. The purposes of camo-proxy are:
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// 1. Allow accessing "http://" images on a HTTPS site by using the "https://" URLs provided by camo-proxy.
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// 2. Hide the visitor's real IP (protect privacy) when accessing external images.
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func CamoEncode(link string) string {
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if strings.HasPrefix(link, setting.Camo.ServerURL) {
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return link
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}
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mac := hmac.New(sha1.New, []byte(setting.Camo.HMACKey))
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_, _ = mac.Write([]byte(link)) // hmac does not return errors
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macSum := base64.RawURLEncoding.EncodeToString(mac.Sum(nil))
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encodedURL := base64.RawURLEncoding.EncodeToString([]byte(link))
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return strings.TrimSuffix(setting.Camo.ServerURL, "/") + "/" + macSum + "/" + encodedURL
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}
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func camoHandleLink(link string) string {
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if setting.Camo.Enabled {
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lnkURL, err := url.Parse(link)
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if err == nil && (lnkURL.Scheme == "http" || lnkURL.Scheme == "https") && !strings.HasPrefix(link, setting.AppURL) &&
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(setting.Camo.Always || lnkURL.Scheme != "https") {
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return CamoEncode(link)
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}
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}
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return link
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}
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