lang option (#131)

src/general.ts

@@ -18,7 +18,13 @@ client.set('maxDataSize', 1024 * 1024);
 
 import Summary from './summary';
 
-export default async (url: URL.Url): Promise<Summary> => {
+export default async (url: URL.Url, lang: string = null): Promise<Summary> => {
+	if (lang && !lang.match(/^[\w-]+(\s*,\s*[\w-]+)*$/)) lang = null;
+
+	client.set('headers', {
+		'Accept-Language': lang
+	});
+
 	const res = await client.fetch(url.href);
 
 	if (res.error) {

src/index.ts

@@ -19,6 +19,11 @@ const builtinPlugins = Object.keys(_builtinPlugins)
 	.map(key => _builtinPlugins[key]);
 
 type Options = {
+	/**
+	 * Accept-Language for the request
+	 */
+	lang?: string;
+
 	/**
 	 * Whether follow redirects
 	 */
@@ -38,6 +43,7 @@ type Result = Summary & {
 };
 
 const defaultOptions = {
+	lang: null,
 	followRedirects: true,
 	plugins: null
 } as Options;
@@ -58,7 +64,7 @@ export default async (url: string, options?: Options): Promise<Result> => {
 	const match = plugins.filter(plugin => plugin.test(_url))[0];
 
 	// Get summary
-	const summary = await (match ? match.summarize : general)(_url);
+	const summary = await (match ? match.summarize : general)(_url, opts.lang);
 
 	if (summary == null) {
 		throw 'failed summarize';

src/iplugin.ts

@@ -3,7 +3,7 @@ import Summary from './summary';
 
 interface IPlugin {
 	test: (url: URL.Url) => boolean;
-	summarize: (url: URL.Url) => Promise<Summary>;
+	summarize: (url: URL.Url, lang?: string) => Promise<Summary>;
 }
 
 export default IPlugin;

src/server/index.ts

@@ -12,6 +12,7 @@ app.use(async ctx => {
 
 	try {
 		const summary = await summaly(ctx.query.url, {
+			lang: ctx.query.lang,
 			followRedirects: false
 		});