mirror of
https://github.com/Rain-kl/OpenFlare.git
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ryan
aa4faddade
Result: {"status":"keep","total_issues":8,"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_exhaustive":0,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"golint_vetx_total":0,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"vitest_failed":0,"vitest_total":116,"measure_s":81}
137 lines
5.3 KiB
Go
137 lines
5.3 KiB
Go
// Copyright 2026 Arctel.net
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// SPDX-License-Identifier: Apache-2.0
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package openresty
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import (
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"crypto/sha256"
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"encoding/hex"
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"strings"
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)
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// SW location strings and Lua module paths used by the Service Worker offline fallback.
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const (
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SWJSLocation = "location = /sw.js"
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SWOfflineLocation = "location = /offline.html"
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SWChallengeLua = "sw/challenge.lua"
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SWRuntimeLua = "sw/runtime.lua"
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swDirPrefix = "sw/"
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)
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// DefaultSWOfflineHTML is the built-in contact page shown when the domain is blocked.
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const DefaultSWOfflineHTML = `<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>网站暂时无法访问 | 联系站长</title>
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<style>
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* { box-sizing: border-box; margin: 0; padding: 0; }
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body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: #ffffff; color: #333333; height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 48px 24px; }
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h1 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
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p { font-size: 16px; line-height: 1.7; color: #666666; max-width: 520px; }
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</style>
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</head>
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<body>
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<h1>网站暂时无法访问</h1>
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<p>当前域名暂时无法从网络访问。请通过其他方式联系网站管理员获取最新访问入口。</p>
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</body>
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</html>
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`
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// EffectiveSWOfflineHTML returns custom HTML when set, otherwise the built-in default.
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func EffectiveSWOfflineHTML(cfg ConfigSnapshot) string {
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if strings.TrimSpace(cfg.SWOfflineHTML) == "" {
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return DefaultSWOfflineHTML
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}
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return cfg.SWOfflineHTML
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}
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// ServiceWorkerSupportFiles returns the sw.js script and offline contact page.
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// The sw.js content is derived from the offline HTML (see defaultSWJS) so that
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// HTML-only edits change the script, forcing browsers to re-install the worker
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// and re-cache the updated page.
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func ServiceWorkerSupportFiles(cfg ConfigSnapshot) []SupportFile {
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if !cfg.SWOfflineEnabled {
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return nil
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}
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html := EffectiveSWOfflineHTML(cfg)
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return []SupportFile{
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{Path: swDirPrefix + "sw.js", Content: defaultSWJS(html)},
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{Path: swDirPrefix + "offline.html", Content: html},
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}
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}
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// swJSTemplate is the service worker body. The cache name is replaced with a
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// version derived from the offline HTML: editing the HTML changes the cache
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// name, which changes the sw.js bytes, which makes the browser re-install the
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// worker (sw.js is served with Cache-Control: no-cache) and fetch the new
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// /offline.html into the fresh cache during install.
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const swJSTemplate = `var CACHE = "__CACHE_NAME__";
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var OFFLINE = "/offline.html";
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self.addEventListener("install", function (e) {
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e.waitUntil(caches.open(CACHE).then(function (c) { return c.addAll([OFFLINE]); }));
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self.skipWaiting();
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});
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self.addEventListener("activate", function (e) {
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e.waitUntil(caches.keys().then(function (keys) {
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return Promise.all(keys.filter(function (k) { return k.indexOf("openflare-offline-") === 0 && k !== CACHE; }).map(function (k) { return caches.delete(k); }));
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}));
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self.clients.claim();
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});
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self.addEventListener("fetch", function (e) {
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if (e.request.method !== "GET" || e.request.mode !== "navigate") { return; }
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e.respondWith(
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fetch(e.request).catch(function () {
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return caches.match(e.request).then(function (r) { return r || caches.match(OFFLINE); });
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})
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);
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});
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`
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func defaultSWJS(offlineHTML string) string {
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sum := sha256.Sum256([]byte(offlineHTML))
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version := hex.EncodeToString(sum[:])[:12]
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return strings.ReplaceAll(swJSTemplate, "__CACHE_NAME__", "openflare-offline-"+version)
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}
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// routeSWEnabled returns true when SW offline fallback applies to this route.
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func routeSWEnabled(routeDomains []string, cfg ConfigSnapshot) bool {
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if !cfg.SWOfflineEnabled || len(cfg.SWOfflineDomains) == 0 {
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return false
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}
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scope := make(map[string]struct{}, len(cfg.SWOfflineDomains))
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for _, d := range cfg.SWOfflineDomains {
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scope[d] = struct{}{}
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}
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for _, d := range routeDomains {
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if _, ok := scope[d]; ok {
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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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// renderServiceWorkerChallenger emits SW static locations and the homepage
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// challenge intercept for HTTPS server blocks.
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func renderServiceWorkerChallenger(_ ConfigSnapshot) string {
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var builder strings.Builder
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builder.WriteString("\n location = /sw.js {\n")
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builder.WriteString(" alias " + SWDirPlaceholder + "/sw.js;\n")
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builder.WriteString(" default_type application/javascript;\n")
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builder.WriteString(" add_header Service-Worker-Allowed /;\n")
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builder.WriteString(" add_header Cache-Control \"no-cache\";\n")
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builder.WriteString(" }\n\n")
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builder.WriteString(" location = /offline.html {\n")
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builder.WriteString(" alias " + SWDirPlaceholder + "/offline.html;\n")
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builder.WriteString(" default_type text/html;\n")
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builder.WriteString(" add_header Cache-Control \"no-cache\";\n")
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builder.WriteString(" }\n\n")
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builder.WriteString(" location = /__openflare_sw_challenge {\n")
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builder.WriteString(" internal;\n")
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builder.WriteString(" # hit when sw.runtime.check() intercepts the homepage in the access phase\n")
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builder.WriteString(" content_by_lua_file " + SWDirPlaceholder + "/challenge.lua;\n")
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builder.WriteString(" }\n")
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return builder.String()
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}
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