Available inall subroutines.
A code representing one of Fastly's POP locations.
We recommend using
server.datacenter when referring to a POP for location
specific use cases.
server.datacenter is used in the following code examples. Examples apply VCL to real-world use cases and can be deployed as they are, or adapted for your own service. See the full list of code examples for more inspiration.
Click RUN on a sample below to provision a Fastly service, execute the code on Fastly, and see how the function behaves.
Tag requests with geolocation data
Add GeoIP data about the client browser as extra headers in any requests from Fastly to your origin.
Fastly offers a myriad of different variables that you can log. See and test a large collection here.