Static files serving

chapter04/flags/license.txt

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+Copyright (c) 2017 Go Squared Ltd. http://www.gosquared.com/
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of the Software,
+and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

chapter04/src/hello_world.js

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+/* @flow */
+"use strict";
+
+const express = require("express");
+const app = express();
+
+app.get("/", (req, res) => res.send("Server alive, with Express!"));
+
+app.listen(8080, () => console.log("Mini server (with Express) ready at http://localhost:8080/!"));

chapter04/src/serve_statics.js

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+/* @flow */
+"use strict";
+
+const express = require("express");
+const path = require("path");
+const app = express();
+
+app.get("/", (req, res) => res.send("Server alive, with Express!"));
+
+app.use(
+    "/static",
+    express.static(path.join(__dirname, "../flags"), {
+        immutable: true,
+        maxAge: "30 days"
+    })
+);
+
+app.listen(8080, () =>
+    console.log(
+        "Mini Express static server ready at http://localhost:8080/!"
+    )
+);

chapter04/src/serve_statics_alt.js

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+/* @flow */
+"use strict";
+
+const express = require("express");
+const app = express();
+
+const path = require("path");
+
+const flagsPath = path.join(__dirname, "../flags");
+
+app.get("/uruguay", (req, res) =>
+    res.sendFile(`${flagsPath}/america/south/UY.png`)
+);
+
+app.get("/england", (req, res) =>
+    res.sendFile(`${flagsPath}/europe/GB.png`)
+);
+
+app.get("/license", (req, res) =>
+    res.sendFile(`${flagsPath}/license.txt`)
+);
+
+app.listen(8080, () =>
+    console.log(
+        "Mini Express static server ready at http://localhost:8080/!"
+    )
+);