Conditionally changing a URL

  Last updated August 01, 2018

To conditionally change a URL based on the domain, include VCL that looks something like this:

if (req.http.host ~ "^restricted") {
  set req.url = "/sanitized" req.url;

If you have shielding enabled, however, add the following code instead to avoid rewriting the URL twice:

if (req.http.host ~ "^restricted" && req.url !~ "^/sanitized") {
  set req.url = "/sanitized" req.url;

In Fastly's web interface, this VCL would be the equivalent of creating a new Header:

the Header window set up to restrict a URL

and then creating a request condition that restricts connections to that host:

a New Request Condition set up to restrict a URL

Additional resources:

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