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# Introduction
The AAF Forward Proxy is a forward proxy service with credential caching capabilities for incoming REST requests. It is one of two applications (along with Reverse proxy) deployed as a
Kubernetes sidecar to the main Primary service
## Features
Forward Proxy:
* The service will forward all incoming REST requests on to their original endpoints.
* Add any cached security credentials to the forwarding request
### Credential Cache:
The credential cache is a short-lived in-memory cache, keyed on a transaction ID. The following data is cached:
* Transaction ID - this is the key for retrieving cached values
* CredentialName - this is the name of the credential to be cached.
This should correspond to the header name for a header credential, or the cookie name for a cookie credential.
* CredentialValue - this is the value associated with the credential.
This should correspond to the header value of a header credential, or the cookie contents for a cookie credential.
* CredentialType - this is the type of the credential to be cached. Currently supported values are: HEADER, COOKIE.
The cache has a configurable cache expiry period, so that any cache entries older than the expiry period will be automatically removed from the cache.
### Credential Cache REST API:
Credentials can be added to the credential cache by performing a REST POST using the following URL:
(Note that the transaction ID is provided as a URL parameter)
https://<host>:<port>/credential-cache/<transactionid>
The body of the request should contain the cached data (described above) in JSON format as follows:
{ "credentialName":"foo", "credentialValue":"bar", "credentialType":"<HEADER/COOKIE>" }
## Configuring the fProxy service
The fProxy service is configured through the fproxy.properties file that resides under the ${CONFIG_HOME} environment variable.
The file has the following configurable properties:
credential.cache.timeout.ms This is the time in milliseconds that a cache entry will expire after it is added. 180000
transactionid.header.name This is the name of the header in incoming requests that will contain the transaction ID. X-TransactionId
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