---
name: "TSHttpTxnRedoCacheLookup"
section: "3ts"
platform: "linux"
package: "trafficserver-dev"
version: "9.2.5+ds-0+deb12u4"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/TSHttpTxnRedoCacheLookup"
---

# TSHttpTxnRedoCacheLookup(3ts)

TSHttpTxnRedoCacheLookup API function

## NAME

TSHttpTxnRedoCacheLookup - TSHttpTxnRedoCacheLookup API function

## SYNOPSIS

```
#include <ts/experimental.h>
```

- ***TSReturnCode* TSHttpTxnRedoCacheLookup(*TSHttpTxn* txnp, const char \*url, int length)**

  ## DESCRIPTION

Perform a cache lookup with a different url. This function rewinds the state machine to perform the new cache lookup. The cache\_info for the new url must have been initialized before calling this function.

If the length argument is -1, this function will take the length from the url argument.

## NOTES

This API may be changed in the future version since it is experimental.

## SEE ALSO

**[TSAPI(3ts)](/TSAPI/3ts.md)**,

## COPYRIGHT

2026, dev@trafficserver.apache.org