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Diffstat (limited to 'railties/guides')
| -rw-r--r-- | railties/guides/source/asset_pipeline.textile | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/railties/guides/source/asset_pipeline.textile b/railties/guides/source/asset_pipeline.textile index aca3c51db5..bd7319d331 100644 --- a/railties/guides/source/asset_pipeline.textile +++ b/railties/guides/source/asset_pipeline.textile @@ -367,6 +367,20 @@ config.assets.prefix = "/some_other_path" This is a handy option if you have any existing project (pre Rails 3.1) that already uses this path. +h4. X-Sendfile headers + +The X-Sendfile header is a directive to the server to ignore the response from the application, and instead serve the file specified in the headers. In production Rails (via Sprockets) does not send the asset - just the location and a zero-length response - relying on the server to do work. Files are faster served by the webserver. Both Apache and nginx support this option. + +New applications contain this line in +production.rb+ + +<erb> +config.action_dispatch.x_sendfile_header = "X-Sendfile" # Use 'X-Accel-Redirect' for nginx +</erb> + +You should check that your server or hosting service actually supports this, otherwise comment it out. + +Gotcha: If you are upgrading an existing application and intend to use this option, take care to paste this configuration option only into +production.rb+ (and not +application.rb+ ). + h3. How caching works Sprockets uses the default rails cache store to cache assets in dev and production. The only difference is filenames are fingerprinted and get far-future headers in production. |