kubernetes/staging/src/k8s.io/client-go/discovery/cached/disk/round_tripper.go

type cacheRoundTripper …

// newCacheRoundTripper creates a roundtripper that reads the ETag on
// response headers and send the If-None-Match header on subsequent
// corresponding requests.
func newCacheRoundTripper(cacheDir string, rt http.RoundTripper) http.RoundTripper { … }

func (rt *cacheRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) { … }

func (rt *cacheRoundTripper) CancelRequest(req *http.Request) { … }

func (rt *cacheRoundTripper) WrappedRoundTripper() http.RoundTripper { … }

type sumDiskCache …

// Get the requested key from the cache on disk. If Get encounters an error, or
// the returned value is not a SHA256 sum followed by bytes with a matching
// checksum it will return false to indicate a cache miss.
func (c *sumDiskCache) Get(key string) ([]byte, bool) { … }

// Set writes the response to a file on disk. The filename will be the SHA256
// sum of the key. The file will contain a SHA256 sum of the response bytes,
// followed by said response bytes.
func (c *sumDiskCache) Set(key string, response []byte) { … }

func (c *sumDiskCache) Delete(key string) { … }

// Sanitize an httpcache key such that it can be used as a diskv key, which must
// be a valid filename. The httpcache key will either be the requested URL (if
// the request method was GET) or "<method> <url>" for other methods, per the
// httpcache.cacheKey function.
func sanitize(key string) string { … }