Function does_encoding_match

src/iocore/cache/HttpTransactCache.cc:808–824

Match request Accept-Encoding with response Content-Encoding. First determine if the cached document has identity encoding. This can be the case if the document has no Content-Encoding header field or if the Content-Encoding field explicitly lists "identity". Then, if there is no Accept-Encoding header and the cached response uses identity encoding return a match. If there is no Accept-

*/
static inline bool
does_encoding_match(char *enc1, const char *enc2)
{
  if (is_asterisk(enc1) || ((strcasecmp(enc1, enc2)) == 0)) {
    return true;
  }

  // rfc2616,sec3.5: applications SHOULD consider "x-gzip" and "x-compress" to be
  //                equivalent to "gzip" and "compress" respectively
  if ((!strcasecmp(enc1, "gzip") && !strcasecmp(enc2, "x-gzip")) || (!strcasecmp(enc1, "x-gzip") && !strcasecmp(enc2, "gzip")) ||
      (!strcasecmp(enc1, "compress") && !strcasecmp(enc2, "x-compress")) ||
      (!strcasecmp(enc1, "x-compress") && !strcasecmp(enc2, "compress"))) {
    return true;
  }

  return false;
}

bool
HttpTransactCache::match_content_encoding(MIMEField *accept_field, const char *encoding_identifier)