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zeekayandHanzo Dev
aa87442fdd
Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
// Copyright 2026 Hanzo AI, Inc. 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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"github.com/hanzoai/git/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 := b64encode(mac.Sum(nil))
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encodedURL := b64encode([]byte(link))
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return strings.TrimSuffix(setting.Camo.ServerURL, "/") + "/" + macSum + "/" + encodedURL
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}
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func b64encode(data []byte) string {
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return strings.TrimRight(base64.URLEncoding.EncodeToString(data), "=")
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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.IsAbs() && !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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