我正在使用sw-toolbox在我的一个客户网站上启用缓存。它通常运行良好,除了由于某种原因,它在第一次加载后会破坏 PDF。我怀疑当它将 PDF 保存到缓存时,它们不知何故损坏了,但我仍然可以从损坏的页面本地保存 PDF,它会很好地打开。
这是我的服务工作者:
((global) => {
// disable the service worker for post previews
global.addEventListener("fetch", (event) => {
if (event.request.url.match(/preview=true/)) {
return;
}
});
// ensure the service worker takes over as soon as possible
global.addEventListener("install", event => event.waitUntil(global.skipWaiting()));
global.addEventListener("activate", event => event.waitUntil(global.clients.claim()));
// set up the cache
global.toolbox.precache(["/", "/offline/"]);
global.toolbox.router.get("/wp-content/uploads/(.*)", toolbox.cacheFirst);
global.toolbox.router.get("/(.*)", toolbox.networkFirst, { NetworkTimeoutSeconds: 5 });
// redirect offline queries to offline page
self.toolbox.router.get("/(.*)", function (req, vals, opts) {
return toolbox.networkFirst(req, vals, opts).catch((error) => {
if (req.method === "GET" && req.headers.get("accept").includes("text/html")) {
return toolbox.cacheOnly(new Request("/offline/"), vals, opts);
}
throw error;
});
});
})(self);
我尝试过的一些事情:
- 添加其他路由
global.toolbox.router.get("/wp-content/uploads/(.*).pdf", toolbox.networkOnly);
更改
/wp-content/uploads/(.*)
路由以重定向到标题为"无缓存"的 PDF URLglobal.toolbox.router.get("/wp-content/uploads/(.*)", function (req, vals, opts) { if (req.url.match(/.pdf$/)) { const pdf_headers = new Headers(); pdf_headers.append("Content-Type", "application/pdf"); return toolbox.networkOnly(new Request(req.url, { method: "GET", headers: pdf_headers, mode: "same-origin", cache: "no-cache", }), vals, opts); } else { return toolbox.cacheFirst; } });
排除 PDF 的方式与排除 PDF 的方式与排除
preview=true
PDF 的方式相同:global.addEventListener("fetch", (event) => { if (event.request.url.match(/preview=true/) || event.request.url.match(/.pdf$/)) { return; } });
我没有想法,希望得到一些指导。测试页面可在此处获得:https://www.westmontparks.org/about-us/board-minutesbid-docs/
这可能与影响Chrome版本71的chrome错误有关。