code-server/lib/vscode/out/vs/workbench/contrib/webview/browser/pre/service-worker.js

Run VS Code on a remote server.

"use strict";const sw=self,VERSION=4,resourceCacheName=`vscode-resource-cache-${VERSION}`,rootPath=sw.location.pathname.replace(/\/service-worker.js$/,""),searchParams=new URL(location.toString()).searchParams,remoteAuthority=searchParams.get("remoteAuthority"),ID=searchParams.get("id"),resourceBaseAuthority=searchParams.get("vscode-resource-base-authority"),resolveTimeout=3e4;class RequestStore{constructor(){this.map=new Map,this.requestPool=0}create(){const e=++this.requestPool;let o;const s=new Promise(i=>o=i),r={resolve:o,promise:s};this.map.set(e,r);const l=setTimeout(()=>{clearTimeout(l);const i=this.map.get(e);if(i===r){i.resolve({status:"timeout"}),this.map.delete(e);return}},resolveTimeout);return{requestId:e,promise:s}}resolve(e,o){const s=this.map.get(e);return s?(s.resolve({status:"ok",value:o}),this.map.delete(e),!0):!1}}const resourceRequestStore=new RequestStore,localhostRequestStore=new RequestStore,unauthorized=()=>new Response("Unauthorized",{status:401}),notFound=()=>new Response("Not Found",{status:404}),methodNotAllowed=()=>new Response("Method Not Allowed",{status:405}),requestTimeout=()=>new Response("Request Timeout",{status:408});sw.addEventListener("message",async t=>{switch(t.data.channel){case"version":{const e=t.source;sw.clients.get(e.id).then(o=>{o&&o.postMessage({channel:"version",version:VERSION})});return}case"did-load-resource":{const e=t.data.data;resourceRequestStore.resolve(e.id,e)||console.log("Could not resolve unknown resource",e.path);return}case"did-load-localhost":{const e=t.data.data;localhostRequestStore.resolve(e.id,e.location)||console.log("Could not resolve unknown localhost",e.origin);return}default:{console.log("Unknown message");return}}}),sw.addEventListener("fetch",t=>{const e=new URL(t.request.url);if(typeof resourceBaseAuthority=="string"&&e.protocol==="https:"&&e.hostname.endsWith("."+resourceBaseAuthority))switch(t.request.method){case"GET":case"HEAD":{const o=e.hostname.slice(0,e.hostname.length-(resourceBaseAuthority.length+1)),s=o.split("+",1)[0],r=o.slice(s.length+1);return t.respondWith(processResourceRequest(t,{scheme:s,authority:r,path:e.pathname,query:e.search.replace(/^\?/,"")}))}default:return t.respondWith(methodNotAllowed())}if(e.origin!==sw.origin&&e.host===remoteAuthority)switch(t.request.method){case"GET":case"HEAD":return t.respondWith(processResourceRequest(t,{path:e.pathname,scheme:e.protocol.slice(0,e.protocol.length-1),authority:e.host,query:e.search.replace(/^\?/,"")}));default:return t.respondWith(methodNotAllowed())}if(e.origin!==sw.origin&&e.host.match(/^(localhost|127.0.0.1|0.0.0.0):(\d+)$/))return t.respondWith(processLocalhostRequest(t,e))}),sw.addEventListener("install",t=>{t.waitUntil(sw.skipWaiting())}),sw.addEventListener("activate",t=>{t.waitUntil(sw.clients.claim())});async function processResourceRequest(t,e){const o=await sw.clients.get(t.clientId);let s;if(o)s=getWebviewIdForClient(o);else{const n=await getWorkerClientForId(t.clientId);if(n)s=getWebviewIdForClient(n);else return console.error("Could not find inner client for request"),notFound()}if(!s)return console.error("Could not resolve webview id"),notFound();const r=t.request.method==="GET",d=(n,p)=>{if(n.status==="timeout")return requestTimeout();const a=n.value;if(a.status===304){if(p)return p.clone();throw new Error("No cache found")}if(a.status===401)return unauthorized();if(a.status!==200)return notFound();const f={"Access-Control-Allow-Origin":"*"},g=a.data.byteLength,y=t.request.headers.get("range");if(y){const h=y.match(/^bytes\=(\d+)\-(\d+)?$/g);if(h){const R=Number(h[1]),q=Number(h[2])||g-1;return new Response(a.data.slice(R,q+1),{status:206,headers:{...f,"Content-range":`bytes 0-${q}/${g}`}})}else return new Response(null,{status:416,headers:{...f,"Content-range":`*/${g}`}})}const c={...f,"Content-Type":a.mime,"Content-Length":g.toString()};a.etag&&(c.ETag=a.etag,c["Cache-Control"]="no-cache"),a.mtime&&(c["Last-Modified"]=new Date(a.mtime).toUTCString());const w=new URL(t.request.url).searchParams.get("vscode-coi");w==="3"?(c["Cross-Origin-Opener-Policy"]="same-origin",c["Cross-Origin-Embedder-Policy"]="require-corp"):w==="2"?c["Cross-Origin-Embedder-Policy"]="require-corp":w==="1"&&(c["Cross-Origin-Opener-Policy"]="same-origin");const C=new Response(a.data,{status:200,headers:c});return r&&a.etag&&caches.open(resourceCacheName).then(h=>h.put(t.request,C)),C.clone()},l=await getOuterIframeClient(s);if(!l.length)return console.log("Could not find parent client for request"),notFound();let i;r&&(i=await(await caches.open(resourceCacheName)).match(t.request));const{requestId:m,promise:u}=resourceRequestStore.create();for(const n of l)n.postMessage({channel:"load-resource",id:m,scheme:e.scheme,authority:e.authority,path:e.path,query:e.query,ifNoneMatch:i?.headers.get("ETag")});return u.then(n=>d(n,i))}async function processLocalhostRequest(t,e){const o=await sw.clients.get(t.clientId);if(!o)return fetch(t.request);const s=getWebviewIdForClient(o);if(!s)return console.error("Could not resolve webview id"),fetch(t.request);const r=e.origin,d=async u=>{if(u.status!=="ok"||!u.value)return fetch(t.request);const n=u.value,p=t.request.url.replace(new RegExp(`^${e.origin}(/|$)`),`${n}$1`);return new Response(null,{status:302,headers:{Location:p}})},l=await getOuterIframeClient(s);if(!l.length)return console.log("Could not find parent client for request"),notFound();const{requestId:i,promise:m}=localhostRequestStore.create();for(const u of l)u.postMessage({channel:"load-localhost",origin:r,id:i});return m.then(d)}function getWebviewIdForClient(t){return t.type==="worker"||t.type==="sharedworker"?ID:new URL(t.url).searchParams.get("id")}async function getOuterIframeClient(t){return(await sw.clients.matchAll({includeUncontrolled:!0})).filter(o=>{const s=new URL(o.url);return(s.pathname===`${rootPath}/`||s.pathname===`${rootPath}/index.html`||s.pathname===`${rootPath}/index-no-csp.html`)&&s.searchParams.get("id")===t})}async function getWorkerClientForId(t){const e=await sw.clients.matchAll({type:"worker"}),o=await sw.clients.matchAll({type:"sharedworker"});return[...e,...o].find(r=>r.id===t)}

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