Prerender adheres to google's
_escaped_fragment_ proposal, which we recommend you use. It's easy:
- Just add <meta name="fragment" content="!"> to the <head> of all of your pages
- If you use hash urls (#), change them to the hash-bang (#!)
Prerender includes lots of plugins, for example using Amazon S3 to cache your prerendered HTML.
Prerender also starts multiple phantomjs processes to maximize throughput.
This is a list of middleware available to use with the prerender service:
- prerender-node (Express)
- prerender_rails (Rails)
Request more middleware for a different framework in this issue.
How it works
This is a simple service that only takes a url and returns the rendered HTML (with all script tags removed).
Note: you should proxy the request through your server (using middleware) so that any relative links to CSS/images/etc still work.
GET http://<your container ip>:<your container port>/https://www.google.com
GET http://<your container ip>:<your container port>/https://www.google.com/search?q=angular
You can enable the Redis feature by setting the
REDIS_URL (in the format redis://user:password@host:port). This currently covers all heroku add-ons for Redis to support quick start.
GET request will check S3 for a cached copy. If a cached copy is found, it will return that. Otherwise, it will make the request to your server and then persist the HTML to the S3 cache.
POST request will skip the S3 cache. It will make a request to your server and then persist the HTML to the S3 cache. The
POST is meant to update the cache.
You'll need to sign up with Amazon Web Services and export these 3 environment variables.
$ export AWS_ACCESS_KEY_ID=<aws access key> $ export AWS_SECRET_ACCESS_KEY=<aws secret access key> $ export S3_BUCKET_NAME=<bucket name>
Warning! Your keys should be kept private and you'll be charged for all files uploaded to S3.
By default, s3HtmlCache works with the US Standard region (East), if your bucket is localized in another region you can config it with an environment variable :
$ export AWS_REGION=<region name>
For example :
$ export AWS_REGION=eu-west-1
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