2023-06-06 12:50:50 -04:00
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import * as MIME from "https://deno.land/std@0.180.0/media_types/mod.ts";
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import * as HTTP from "https://deno.land/std@0.177.0/http/server.ts";
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2023-06-06 22:24:43 -04:00
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import * as SWCW from "https://esm.sh/@swc/wasm-web@1.3.62";
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2023-06-06 12:50:50 -04:00
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2023-06-07 23:35:00 -04:00
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type DenoConfig = {imports:Record<string, string>};
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const ImportMap:DenoConfig = {imports:{}};
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const ImportMapReload =async()=>
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{
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let json:DenoConfig;
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const path = Configuration.Proxy+"/deno.json";
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try
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{
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const resp = await fetch(path);
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json = await resp.json();
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if(!json?.imports)
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{ throw new Error("imports not specified in deno.json") }
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}
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catch(e)
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{
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console.log(`error reading deno config "${path}" message:"${e}"`);
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return;
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}
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2023-06-20 22:56:20 -04:00
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Object.entries(json.imports).forEach(([key, value])=>
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{
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if(value.startsWith("./"))
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{
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json.imports[key] = value.substring(1);
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}
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});
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if(!json.imports["@able/"])
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{
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console.log(`"@able/" specifier not defined in import map`);
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}
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json.imports["@able/"] = "/_lib_/";
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if(!json.imports["react"])
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{
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console.log(`"react" specifier not defined in import map`);
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}
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2023-06-21 21:20:24 -04:00
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ImportMap.imports = Configuration.Remap(json.imports, Configuration);
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console.log(ImportMap.imports);
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};
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type CustomHTTPHandler = (inReq:Request, inURL:URL, inExt:string|false, inMap:{imports:Record<string, string>}, inConfig:Configuration)=>void|false|Response|Promise<Response|void|false>;
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type CustomRemapper = (inImports:Record<string, string>, inConfig:Configuration)=>Record<string, string>;
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type Configuration = {Proxy:string, Allow:string, Reset:string, SWCOp:SWCW.Options, Serve:CustomHTTPHandler, Shell:CustomHTTPHandler, Remap:CustomRemapper};
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type ConfigurationArgs = {Proxy?:string, Allow?:string, Reset?:string, SWCOp?:SWCW.Options, Serve?:CustomHTTPHandler, Shell?:CustomHTTPHandler, Remap?:CustomRemapper};
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let Configuration:Configuration =
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{
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Proxy: new URL(`file://${Deno.cwd().replaceAll("\\", "/")}`).toString(),
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Allow: "*",
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Reset: "/clear-cache",
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Serve(inReq, inURL, inExt, inMap, inProxy){},
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Remap: (inImports, inConfig)=>
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{
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const reactURL = inImports["react"];
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const setting = Configuration.SWCOp?.jsc?.transform?.react;
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if(setting && reactURL)
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{
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setting.importSource = reactURL;
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}
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return inImports;
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},
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Shell(inReq, inURL, inExt, inMap, inConfig)
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{
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console.log("Start app:", Deno.mainModule, "start dir", inConfig.Proxy);
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console.log("Split:", Deno.mainModule.split(inConfig.Proxy) );
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const parts = Deno.mainModule.split(inConfig.Proxy);
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return new Response(
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`<!doctype html>
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<html>
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
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<meta charset="utf-8"/>
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</head>
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<body>
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<div id="app"></div>
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<script type="importmap">${JSON.stringify(inMap)}</script>
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<script type="module">
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import Mount from "/_lib_/boot-browser.tsx";
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Mount("#app", "${parts[1]??"/app.tsx"}");
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</script>
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</body>
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</html>`, {status:200, headers:{"content-type":"text/html"}});
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},
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SWCOp:
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{
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sourceMaps: false,
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minify: true,
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jsc:
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{
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target:"es2022",
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minify:
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{
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compress: { unused: true },
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mangle: true
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},
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parser:
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{
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syntax: "typescript",
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tsx: true,
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},
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transform:
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{
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react: { runtime: "automatic" }
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}
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}
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}
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};
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export const Transpile =
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{
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Cache: new Map() as Map<string, string>,
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Files: ["tsx", "jsx", "ts", "js", "mjs"],
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Check(inExtension:string|false)
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{
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return inExtension ? this.Files.includes(inExtension) : false;
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},
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Clear()
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{
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const size = this.Cache.size;
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this.Cache.clear();
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ImportMapReload();
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return size;
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},
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Fetch: async function(inPath:string, inKey:string, inCheckCache=true)
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{
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const check = this.Cache.get(inPath);
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if(check && inCheckCache)
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{
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return check;
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}
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else
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{
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try
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{
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const resp = await fetch(inPath);
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const text = await resp.text();
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const {code} = await SWCW.transform(text, { ...Configuration.SWCOp, filename:inKey});
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this.Cache.set(inKey, code);
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return code;
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}
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catch(e)
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{
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console.log(`Transpile.Fetch error. Key:"${inKey}" Path:"${inPath}" Error:"${e}"`);
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return null;
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}
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}
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}
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};
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export const Extension =(inPath:string)=>
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{
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const posSlash = inPath.lastIndexOf("/");
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const posDot = inPath.lastIndexOf(".");
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return posDot > posSlash ? inPath.substring(posDot+1).toLowerCase() : false;
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};
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export const Configure =(config:ConfigurationArgs)=>
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{
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Configuration = {...Configuration, ...config};
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ImportMapReload();
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}
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await ImportMapReload();
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await SWCW.default();
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HTTP.serve(async(req: Request)=>
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{
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const url:URL = new URL(req.url);
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const ext = Extension(url.pathname);
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const headers = {"content-type":"application/json", "Access-Control-Allow-Origin": Configuration.Allow, "charset":"UTF-8"};
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// cache-reset route
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if(url.pathname === Configuration.Reset)
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{
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return new Response(`{"cleared":${Transpile.Clear()}}`, {headers});
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}
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// allow for custom handler
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const custom = await Configuration.Serve(req, url, ext, ImportMap, Configuration);
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if(custom)
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{
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return custom;
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}
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// transpileable files
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if(Transpile.Check(ext))
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{
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let code;
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let path;
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if(url.pathname.startsWith("/_lib_/"))
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{
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const clipRoot = import.meta.url.substring(0, import.meta.url.lastIndexOf("/"));
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const clipPath = url.pathname.substring(url.pathname.indexOf("/", 1));
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if(clipPath.startsWith("/boot-"))
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{
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path = clipRoot+"/boot-browser.tsx";
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}
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else
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{
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path = clipRoot + clipPath;
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}
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console.log("transpiling", path);
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code = await Transpile.Fetch(path, url.pathname, true);
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}
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else
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{
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path = Configuration.Proxy + url.pathname;
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code = await Transpile.Fetch(path, url.pathname);
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}
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if(code)
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{
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return new Response(code, {headers:{...headers, "content-type":"application/javascript"}} );
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}
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}
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// custom page html
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if(!ext)
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{
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const shell = await Configuration.Shell(req, url, ext, ImportMap, Configuration);
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if(shell)
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{
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return shell;
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}
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}
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// all other static files
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if(ext)
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{
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try
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{
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const type = MIME.typeByExtension(ext);
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const file = await fetch(Configuration.Proxy + url.pathname);
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const text = await file.text();
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return new Response(text, {headers:{...headers, "content-type":type||""}});
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}
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catch(e)
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{
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return new Response(`{"error":"${e}", "path":"${url.pathname}"}`, {status:404, headers});
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}
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}
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return new Response(`{"error":"unmatched route", "path":"${url.pathname}"}`, {status:404, headers});
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});
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