feat: 静态资源支持缓存

Author: Flex-7746

backend/src/cgi.js

@@ -13,15 +13,18 @@ async function getData() {
 
   if (assets) {
     const path = assets === "/" ? "/index.html" : assets;
+    const cache = assets !== "/";
 
     return {
-      api: "assets",
-      query: { path: `/var/apps/code.editor/target/server/dist${path}` },
+      env,
+      api: "read",
+      query: { path: `/var/apps/code.editor/target/server/dist${path}`, cache },
       body: {},
     };
   }
 
   const result = {
+    env,
     api: env.HTTP_API_PATH || "",
     query: querystring.parse(env.QUERY_STRING || ""),
     body: {},

backend/src/router/read.js

@@ -20,6 +20,17 @@ module.exports = async function read({ query }) {
     const testFd = fs.openSync(path, "r");
     fs.closeSync(testFd);
 
+    if (query.cache) {
+      const maxAge = 365 * 24 * 60 * 60;
+
+      console.log(`Cache-Control: public, max-age=${maxAge}, immutable`);
+      console.log(
+        `Expires: ${new Date(Date.now() + maxAge * 1000).toUTCString()}`
+      );
+      console.log(`Last-Modified: ${stat.mtime.toUTCString()}`);
+      console.log(`ETag: "${stat.size}-${stat.mtime.getTime()}"`);
+    }
+
     return {
       code: 200,
       msg: "操作成功",

backend/src/utils/exec.js

@@ -1,7 +1,6 @@
 const getType = require("./type");
 
 const router = {
-  assets: { type: "file", run: require("../router/read") },
   read: { type: "file", run: require("../router/read") },
   save: { run: require("../router/save") },
 };