ICAP integration with Reverse Proxy - Workflow

A client request follows the path depicted in the diagram:

1. A client sends a request to Reverse Proxy.
2. Reverse Proxy passes the request to the ICAP server.
3. The ICAP server uses the Internet Content Adaptation Protocol (ICAP) to generate a response and sends it back to Reverse Proxy. The response can be one of the following:
   1. A modified version of the request that is forwarded to other ICAP servers in the chain, or to the backend Web server.
   2. An HTTP response for this request that must then be sent back to the client.
   3. An error, which is processed by Reverse Proxy.
4. The modified request is then sent to the backend Web server.
5. A response is generated by the backend Web server.
6. Reverse Proxy passes the response to the ICAP server
7. A response is generated by the ICAP server and sent back to Reverse Proxy. The response can be one of the following:
   1. A modified version of the response.
   2. An error.
8. The response is sent to the client.