PRBool
nsHttpResponseHead::IsResumable()
{
// even though some HTTP/1.0 servers may support byte range requests, we're not
// going to bother with them, since those servers wouldn't understand If-Range.
return mVersion >= NS_HTTP_VERSION_1_1 &&
PeekHeader(nsHttp::Content_Length) &&
(PeekHeader(nsHttp::ETag) || PeekHeader(nsHttp::Last_Modified)) &&
HasHeaderValue(nsHttp::Accept_Ranges, "bytes");
}
bool
nsHttpResponseHead::MustValidateIfExpired() const
{
// according to RFC2616, section 14.9.4:
//
// When the must-revalidate directive is present in a response received by a
// cache, that cache MUST NOT use the entry after it becomes stale to respond to
// a subsequent request without first revalidating it with the origin server.
//
return HasHeaderValue(nsHttp::Cache_Control, "must-revalidate");
}
bool
nsHttpResponseHead::IsResumable() const
{
// even though some HTTP/1.0 servers may support byte range requests, we're not
// going to bother with them, since those servers wouldn't understand If-Range.
// Also, while in theory it may be possible to resume when the status code
// is not 200, it is unlikely to be worth the trouble, especially for
// non-2xx responses.
return mStatus == 200 &&
mVersion >= NS_HTTP_VERSION_1_1 &&
PeekHeader(nsHttp::Content_Length) &&
(PeekHeader(nsHttp::ETag) || PeekHeader(nsHttp::Last_Modified)) &&
HasHeaderValue(nsHttp::Accept_Ranges, "bytes");
}
