Merge pull request #9 from jrbenito/pass-headers-nt3rp

Pass headers to s3-sync to be able to set metadata in objects

README.md

@@ -21,11 +21,28 @@ deploy:
   aws_secret: <AWS secret key>  // Optional, if the environment variable `AWS_SECRET_ACCESS_KEY` is set
   concurrency: <number of connections> // Optional
   region: <region>  // Optional, see https://github.com/LearnBoost/knox#region
+  headers: <headers in JSON format> // pass any headers to S3, usefull for metadata cache setting of Hexo assets
+```
+#### Example: header Cache-Control
+
+``` yaml
+deploy:
+  type: s3-cloudfront
+  bucket: my-site-bucket
+  cf_distribution: mydistributionid
+  headers: {CacheControl: 'max-age=604800, public'}
+```
+
+This will set "Cache-Control" header in every file deployed to max-age 1 week. This solves "Leverage browser caching" on most page speed analyzers. For custom metadata use:
+
+``` yaml
+  headers: {Metadata : { x-amz-meta-mykey: "my value" }}
 ```
 
 ## Contributors
 
 - Josh Strange ([joshstrange](https://github.com/joshstrange); original implementation)
+- Josenivaldo Benito Jr. ([JrBenito](https://github.com/jrbenito))
 
 ## License