Merge pull request #52 from doublecrowngaming/add-header-options

Add support for any request header

README.md

@@ -40,6 +40,7 @@ Additionally you can pass an options object which should add more functionality
 | ------------- |:-------------:|
 | imagesPropertyType  (**optional**) (ex: 'og')     | Fetches images only with the specified property, `meta[property='${imagesPropertyType}:image']` |
 | language  (**optional**) (ex: 'de', 'en-US')     | Fetch content with specific language |
+| headers  (**optional**) (ex: { 'user-agent': 'googlebot' })     | Add request headers to fetch call |
 
 
 ```javascript
@@ -48,6 +49,10 @@ LinkPreview.getPreview(
   {
     imagesPropertyType: 'og', // fetches only open-graph images
     language: 'fr-CA', // fetches site for French language
+    headers: {
+      'user-agent': 'googlebot', // fetches with googlebot crawler user agent
+      // ...other optional request headers
+    },
   })
   .then(data => console.debug(data));
 ```
@@ -122,4 +127,3 @@ yarn test
 ## License
 
 MIT license
-

index.js

@@ -23,9 +23,10 @@ exports.getPreview = function (text, options) {
 
     if (detectedUrl) {
       var fetchOptions = {}
-      if (options && options.language) {
+      if (options) {
         fetchOptions.headers = {
-          'Accept-Language': options.language
+          'Accept-Language': options.language,
+          ...options.headers,
         }
       }
       fetch(detectedUrl, fetchOptions)