HTTP Caching

common/spaces/asset_bundle_space_primitives.ts

@@ -3,6 +3,7 @@ import { FileMeta } from "../types.ts";
 import { FileData, FileEncoding, SpacePrimitives } from "./space_primitives.ts";
 import { AssetBundle } from "../../plugos/asset_bundle/bundle.ts";
 
+const bootTime = Date.now();
 export class AssetBundlePlugSpacePrimitives implements SpacePrimitives {
   constructor(
     private wrapped: SpacePrimitives,
@@ -16,7 +17,7 @@ export class AssetBundlePlugSpacePrimitives implements SpacePrimitives {
       .map((p) => ({
         name: p,
         contentType: "application/json",
-        lastModified: 0,
+        lastModified: bootTime,
         perm: "ro",
         size: -1,
       } as FileMeta)).concat(l);
@@ -32,7 +33,7 @@ export class AssetBundlePlugSpacePrimitives implements SpacePrimitives {
       return Promise.resolve({
         data: encoding === "string" ? new TextDecoder().decode(data) : data,
         meta: {
-          lastModified: 0,
+          lastModified: bootTime,
           size: data.byteLength,
           perm: "ro",
           contentType: "application/json",
@@ -46,7 +47,7 @@ export class AssetBundlePlugSpacePrimitives implements SpacePrimitives {
     if (this.assetBundle.has(name)) {
       const data = this.assetBundle.readFileSync(name);
       return Promise.resolve({
-        lastModified: 0,
+        lastModified: bootTime,
         size: data.byteLength,
         perm: "ro",
         contentType: "application/json",

plugs/core/cloud.ts

@@ -5,12 +5,13 @@ import type {
 import { renderToText, replaceNodesMatching } from "$sb/lib/tree.ts";
 import type { FileMeta } from "../../common/types.ts";
 import { parseMarkdown } from "$sb/silverbullet-syscall/markdown.ts";
+import { base64EncodedDataUrl } from "../../plugos/asset_bundle/base64.ts";
 
 const pagePrefix = "💭 ";
 
 export async function readFileCloud(
   name: string,
-  _encoding: FileEncoding,
+  encoding: FileEncoding,
 ): Promise<{ data: FileData; meta: FileMeta } | undefined> {
   const originalUrl = name.substring(
     pagePrefix.length,
@@ -36,10 +37,15 @@ export async function readFileCloud(
     console.error("ERROR", e.message);
     text = e.message;
   }
-  return {
+  text = await translateLinksWithPrefix(
-    data: await translateLinksWithPrefix(
     text,
     `${pagePrefix}${originalUrl.split("/")[0]}/`,
+  );
+  console.log("Got this", text);
+  return {
+    data: encoding === "string" ? text : base64EncodedDataUrl(
+      "text/markdown",
+      new TextEncoder().encode(text),
     ),
     meta: {
       name,

plugs/core/page.ts

@@ -228,11 +228,12 @@ export async function reindexSpace() {
 }
 
 export async function clearPageIndex(page: string) {
-  console.log("Clearing page index for page", page);
+  // console.log("Clearing page index for page", page);
   await index.clearPageIndexForPage(page);
 }
 
 export async function parseIndexTextRepublish({ name, text }: IndexEvent) {
+  console.log("Reindexing", name);
   await events.dispatchEvent("page:index", {
     name,
     tree: await markdown.parseMarkdown(text),

server/http_server.ts

@@ -215,16 +215,26 @@ export class HttpServer {
     // Serve static files (javascript, css, html)
     this.app.use(async ({ request, response }, next) => {
       if (request.url.pathname === "/") {
+        if (request.headers.get("If-Modified-Since") === staticLastModified) {
+          response.status = 304;
+          return;
+        }
         response.headers.set("Content-type", "text/html");
         response.body = this.assetBundle.readTextFileSync(
           "web/index.html",
         );
         response.headers.set("Last-Modified", staticLastModified);
-        response.headers.set("ETag", await etag.calculate(response.body));
         return;
       }
       try {
         const assetName = `web${request.url.pathname}`;
+        if (
+          this.assetBundle.has(assetName) &&
+          request.headers.get("If-Modified-Since") === staticLastModified
+        ) {
+          response.status = 304;
+          return;
+        }
         response.status = 200;
         response.headers.set(
           "Content-type",
@@ -233,9 +243,9 @@ export class HttpServer {
         const data = this.assetBundle.readFileSync(
           assetName,
         );
+        response.headers.set("Cache-Control", "no-cache");
         response.headers.set("Content-length", "" + data.length);
         response.headers.set("Last-Modified", staticLastModified);
-        response.headers.set("ETag", await etag.calculate(data));
 
         if (request.method === "GET") {
           response.body = data;
@@ -299,7 +309,7 @@ export class HttpServer {
     });
 
     fsRouter
-      .get("\/(.+)", async ({ params, response }) => {
+      .get("\/(.+)", async ({ params, response, request }) => {
         const name = params[0];
         console.log("Loading file", name);
         try {
@@ -307,12 +317,23 @@ export class HttpServer {
             name,
             "arraybuffer",
           );
+          const lastModifiedHeader = new Date(attachmentData.meta.lastModified)
+            .toUTCString();
+          if (request.headers.get("If-Modified-Since") === lastModifiedHeader) {
+            response.status = 304;
+            return;
+          }
           response.status = 200;
           response.headers.set(
             "X-Last-Modified",
             "" + attachmentData.meta.lastModified,
           );
+          response.headers.set("Cache-Control", "no-cache");
           response.headers.set("X-Permission", attachmentData.meta.perm);
+          response.headers.set(
+            "Last-Modified",
+            lastModifiedHeader,
+          );
           response.headers.set("Content-Type", attachmentData.meta.contentType);
           response.body = attachmentData.data as ArrayBuffer;
         } catch {
@@ -343,7 +364,6 @@ export class HttpServer {
           response.body = "Write failed";
           console.error("Pipeline failed", err);
         }
-        console.log("Done with put", name);
       })
       .options("\/(.+)", async ({ response, params }) => {
         const name = params[0];