able-baker/serve.tsx
2023-06-06 22:48:45 -04:00

121 lines
3.6 KiB
TypeScript

import * as MIME from "https://deno.land/std@0.180.0/media_types/mod.ts";
import * as HTTP from "https://deno.land/std@0.177.0/http/server.ts";
import * as SWCW from "https://esm.sh/@swc/wasm-web@1.3.62";
export type Configuration = {Proxy:string, Allow:string, Reset:string, Local:boolean};
export type ConfigurationArgs = {Proxy?:string, Allow?:string, Reset?:string, Local?:boolean};
export let Configure:Configuration =
{
Proxy: "",
Allow: "*",
Reset: "/clear-cache",
Local: false
};
export default (config:ConfigurationArgs)=> Configure = {...Configure, ...config};
export const Transpile = {
Config:
{
sourceMaps: false,
minify: true,
jsc:
{
target:"es2017",
minify:
{
compress: { unused: true },
mangle: true
},
parser:
{
syntax: "typescript",
tsx: true,
},
transform:
{
react: { runtime: "automatic" }
}
},
} as SWCW.Options,
Cache: new Map() as Map<string, string>,
Clear()
{
const size = this.Cache.size;
this.Cache.clear();
return size;
},
Fetch: async function(inPath:string, inKey:string, inCheckCache=true)
{
console.log("transpile", inPath)
if(inPath.endsWith(".tsx") || inPath.endsWith(".jsx") || inPath.endsWith(".js") || inPath.endsWith(".mjs"))
{
const check = this.Cache.get(inPath);
if(check && inCheckCache)
{
return check;
}
else
{
try
{
const resp = await fetch(inPath);
const text = await resp.text();
const {code} = await SWCW.transform(text, {...this.Config, filename:inKey});
this.Cache.set(inKey, code);
return code;
}
catch(e)
{
console.log(`xpile.tsx error. Key:${inKey} Path:${inPath} Error:"${e}"`);
return null;
}
}
}
else
{
return false;
}
}
};
SWCW.default();
console.log("starting server");
HTTP.serve(async(req: Request)=>
{
const url:URL = new URL(req.url);
if(url.pathname.endsWith("/"))
{
}
if(url.pathname === Configure.Reset)
{
return new Response(`cache cleared (${Transpile.Clear()} items)`);
}
const lookup = await Transpile.Fetch(Configure.Proxy + url.pathname, url.pathname);
if(lookup === null)
{
// error
return new Response(`transpile error (see console)`, {status:404, headers:{"content-type":"application/javascript", "Access-Control-Allow-Origin": Configure.Allow, charset:"utf-8"}});
}
else if(lookup === false)
{
// not a javascript file
try
{
const type = MIME.typeByExtension(url.pathname.substring(url.pathname.lastIndexOf("."))) || "text/html";
const file = await fetch(Configure.Proxy + url.pathname);
const text = await file.text();
return new Response(text, {headers:{"content-type":type, "Access-Control-Allow-Origin":Configure.Allow, charset:"utf-8"}});
}
catch(e)
{
return new Response(`404 ${Configure.Proxy + url.pathname}`, {status:404});
}
}
else
{
return new Response(lookup, {headers:{"content-type":"application/javascript", "Access-Control-Allow-Origin": Configure.Allow, charset:"utf-8"}});
}
});