add sw

routes/_middleware.ts

@@ -0,0 +1,53 @@
+import { MiddlewareHandlerContext } from "$fresh/server.ts";
+import { build } from "esbuild/mod.js";
+import { join, resolve } from "std/path/mod.ts";
+import { asyncForEach, calFileMd5, checkMapFile } from "../utils.ts";
+
+export async function handler(req: Request, ctx: MiddlewareHandlerContext) {
+    const url = new URL(req.url);
+    if (url.pathname == "/sw.js") {
+        const base = import.meta.resolve("../static").slice(8);
+        const map_file = join(base, "sw.meta.json");
+        if (!(await checkMapFile(map_file))) {
+            const data = await build({
+                entryPoints: [join(base, "sw.ts")],
+                outfile: join(base, "sw.js"),
+                metafile: true,
+            });
+            const map = data.metafile;
+            await asyncForEach(
+                Object.getOwnPropertyNames(map.inputs),
+                async (k) => {
+                    const p = resolve(k);
+                    if (p !== k) {
+                        map.inputs[p] = map.inputs[k];
+                        delete map.inputs[k];
+                        k = p;
+                    }
+                    const data = map.inputs[k];
+                    data.md5 = await calFileMd5(k);
+                },
+            );
+            await asyncForEach(
+                Object.getOwnPropertyNames(map.outputs),
+                async (k) => {
+                    const p = resolve(k);
+                    if (p !== k) {
+                        map.outputs[p] = map.outputs[k];
+                        delete map.outputs[k];
+                        k = p;
+                    }
+                    const data = map.outputs[k];
+                    data.md5 = await calFileMd5(k);
+                },
+            );
+            await Deno.writeTextFile(map_file, JSON.stringify(map));
+            console.log("Rebuild.");
+        }
+    }
+    const res = await ctx.next();
+    if (url.pathname == "/sw.js") {
+        res.headers.delete("etag");
+    }
+    return res;
+}

routes/api/deploy_id.ts

@@ -0,0 +1,10 @@
+import { Handlers } from "$fresh/server.ts";
+
+export const handler: Handlers = {
+    GET(_req, _ctx) {
+        const data = { id: Deno.env.get("DENO_DEPLOYMENT_ID") };
+        return new Response(JSON.stringify(data), {
+            headers: { "Content-Type": "application/json" },
+        });
+    },
+};