Abstract: Placeholders are inserted and replaced in placeholders in code included in resources. A proxy receives a request for a resource from a client and verifies an authentication credential included therein. The proxy determines a placeholder value indicating the authentication credential is verified and determines the requested resource corresponds to a first modified version of the resource stored in memory accessible to the proxy, the first modified version comprising a code component including a placeholder inserted by the proxy. The proxy replaces the placeholder with a first placeholder value to generate a second modified version of the resource and transmits the second modified version of the resource to a client. In another aspect, a client-side proxy service detects events in a modified version of a web page, inserts a placeholder in code of the web page, replaces the placeholder with a placeholder value, and evaluates the modified code.

Abstract: Placeholders are inserted and replaced in placeholders in code included in resources. A proxy receives a request for a resource from a client and verifies an authentication credential included therein. The proxy determines a placeholder value indicating the authentication credential is verified and determines the requested resource corresponds to a first modified version of the resource stored in memory accessible to the proxy, the first modified version comprising a code component including a placeholder inserted by the proxy. The proxy replaces the placeholder with a first placeholder value to generate a second modified version of the resource and transmits the second modified version of the resource to a client. In another aspect, a client-side proxy service detects events in a modified version of a web page, inserts a placeholder in code of the web page, replaces the placeholder with a placeholder value, and evaluates the modified code.