Add static file serve for resources inside of data-directory (coder#19)

Author: kylecarbs

packages/server/package.json

@@ -17,13 +17,15 @@
 		"@oclif/errors": "^1.2.2",
 		"@oclif/plugin-help": "^2.1.4",
 		"express": "^4.16.4",
+		"mime-types": "^2.1.21",
 		"nexe": "^2.0.0-rc.34",
 		"node-pty": "^0.8.1",
 		"spdlog": "^0.7.2",
 		"ws": "^6.1.2"
 	},
 	"devDependencies": {
 		"@types/express": "^4.16.0",
+		"@types/mime-types": "^2.1.0",
 		"@types/ws": "^6.0.1",
 		"string-replace-webpack-plugin": "^0.1.3",
 		"ts-node": "^7.0.1",

packages/server/src/server.ts

@@ -4,8 +4,11 @@ import { Server, ServerOptions } from "@coder/protocol/src/node/server";
 import { NewSessionMessage } from '@coder/protocol/src/proto';
 import { ChildProcess } from "child_process";
 import * as express from "express";
+import * as fs from "fs";
 import * as http from "http";
+import * as mime from "mime-types";
 import * as path from "path";
+import * as util from "util";
 import * as ws from "ws";
 import { forkModule } from "./vscode/bootstrapFork";
 
@@ -63,6 +66,43 @@ export const createApp = (registerMiddleware?: (app: express.Application) => voi
 
 	app.use(express.static(path.join(__dirname, "../build/web")));
 
+	app.get("/resource/:url(*)", async (req, res) => {
+		try {
+			const fullPath = `/${req.params.url}`;
+			const relative = path.relative(options!.dataDirectory, fullPath);
+			if (relative.startsWith("..")) {
+				return res.status(403).end();
+			}
+			const exists = await util.promisify(fs.exists)(fullPath);
+			if (!exists) {
+				res.status(404).end();
+				return;
+			}
+			const stat = await util.promisify(fs.stat)(fullPath);
+			if (!stat.isFile()) {
+				res.write("Resource must be a file.");
+				res.status(422);
+				res.end();
+
+				return;
+			}
+			let mimeType = mime.lookup(fullPath);
+			if (mimeType === false) {
+				mimeType = "application/octet-stream";
+			}
+			const content = await util.promisify(fs.readFile)(fullPath);
+
+			res.header("Content-Type", mimeType as string);
+			res.write(content);
+			res.status(200);
+			res.end();
+		} catch (ex) {
+			res.write(ex.toString());
+			res.status(500);
+			res.end();
+		}
+	});
+
 	return {
 		express: app,
 		server,

packages/server/yarn.lock

@@ -107,6 +107,11 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha1-7ihweulOEdK4J7y+UnC86n8+ce4=
 
+"@types/mime-types@^2.1.0":
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/@types/mime-types/-/mime-types-2.1.0.tgz#9ca52cda363f699c69466c2a6ccdaad913ea7a73"
+  integrity sha1-nKUs2jY/aZxpRmwqbM2q2RPqenM=
+
 "@types/mime@*":
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.0.tgz#5a7306e367c539b9f6543499de8dd519fac37a8b"
@@ -2224,7 +2229,7 @@ mime-db@^1.28.0, mime-db@~1.37.0:
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.37.0.tgz#0b6a0ce6fdbe9576e25f1f2d2fde8830dc0ad0d8"
   integrity sha512-R3C4db6bgQhlIhPU48fUtdVmKnflq+hRdad7IyKhtFj06VPNVdk2RhiYL3UjQIlso8L+YxAtFkobT0VK+S/ybg==
 
-mime-types@^2.1.12, mime-types@~2.1.18, mime-types@~2.1.19:
+mime-types@^2.1.12, mime-types@^2.1.21, mime-types@~2.1.18, mime-types@~2.1.19:
   version "2.1.21"
   resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.21.tgz#28995aa1ecb770742fe6ae7e58f9181c744b3f96"
   integrity sha512-3iL6DbwpyLzjR3xHSFNFeb9Nz/M8WDkX33t1GFQnFOllWk8pOrh/LSrB5OXlnlW5P9LH73X6loW/eogc+F5lJg==