Clean up proxy codes

Closes #35

src/config.ts

@@ -58,7 +58,6 @@ interface Mixin {
 	auth_url: string;
 	dev_url: string;
 	drive_url: string;
-	proxy_url: string;
 }
 
 export type IConfig = ISource & Mixin;
@@ -90,7 +89,6 @@ export default (path: string) => {
 	mixin.auth_url = `${mixin.scheme}://auth.${mixin.host}`;
 	mixin.dev_url = `${mixin.scheme}://dev.${mixin.host}`;
 	mixin.drive_url = `${mixin.secondary_scheme}://file.${mixin.secondary_host}`;
-	mixin.proxy_url = `${mixin.secondary_scheme}://proxy.${mixin.secondary_host}`;
 
 	return Object.assign(config || {}, mixin) as IConfig;
 };

src/server.ts

@@ -29,7 +29,6 @@ app.use((req, res, next) => {
 app.use(vhost(`api.${config.host}`, require('./api/server')));
 app.use(vhost(config.secondary_host, require('./himasaku/server')));
 app.use(vhost(`file.${config.secondary_host}`, require('./file/server')));
-app.use(vhost(`proxy.${config.secondary_host}`, require('./web/service/proxy/server')));
 app.use(require('./web/server'));
 
 /**

src/web/service/proxy/proxy.ts

-import * as URL from 'url';
-import * as express from 'express';
-import * as request from 'request';
-import * as isUrl from 'is-url';
-
-module.exports = (req: express.Request, res: express.Response) => {
-	const url = req.params.url;
-
-	if (!url || !isUrl(url)) {
-		return;
-	}
-
-	request({
-		url: url + URL.parse(req.url, true).search,
-		encoding: null
-	}, (err, response, content) => {
-		if (err) {
-			console.error(err);
-			return;
-		}
-
-		const contentType = response.headers['content-type'];
-
-		if (/^text\//.test(contentType) || contentType === 'application/javascript') {
-			content = content.toString().replace(/http:\/\//g, `${config.secondary_scheme}://proxy.${config.secondary_host}/http://`);
-		}
-
-		res.header('Content-Type', contentType);
-		res.send(content);
-	});
-};

src/web/service/proxy/server.ts

-/**
- * Forward Proxy Service
- */
-
-import * as express from 'express';
-import * as cors from 'cors';
-
-/**
- * Init app
- */
-const app = express();
-app.disable('x-powered-by');
-app.use(cors());
-
-app.get('/:url(*)', require('./proxy'));
-
-module.exports = app;

src/web/service/url-preview.ts

@@ -9,5 +9,7 @@ module.exports = async (req: express.Request, res: express.Response) => {
 };
 
 function wrap(url: string): string {
-	return `${config.proxy_url}/${url}`;
+	return url != null
+		? `https://images.weserv.nl/?url=${url.replace(/^https?:\/\//, '')}`
+		: null;
 }