@Override
public Date getLastModified() {
Object d = metadata.getFirst(HttpHeaders.LAST_MODIFIED);
if (d == null) return null;
if (d instanceof Date) return (Date) d;
return DateUtil.parseDate(d.toString());
}
@Override
public Date getDate() {
Object d = metadata.getFirst(HttpHeaders.DATE);
if (d == null) return null;
if (d instanceof Date) return (Date) d;
return DateUtil.parseDate(d.toString());
}
public ClientResponse updateOnNotModified(
ClientRequest request, BrowserCache.Entry old, BaseClientResponse response) throws Exception {
old.getHeaders().remove(HttpHeaders.CACHE_CONTROL);
old.getHeaders().remove(HttpHeaders.EXPIRES);
old.getHeaders().remove(HttpHeaders.LAST_MODIFIED);
String cc = (String) response.getResponseHeaders().getFirst(HttpHeaders.CACHE_CONTROL);
String exp = (String) response.getResponseHeaders().getFirst(HttpHeaders.EXPIRES);
int expires = -1;
if (cc != null) {
CacheControl cacheControl = CacheControl.valueOf(cc);
if (cacheControl.isNoCache()) {
return createClientResponse(request, old);
}
expires = cacheControl.getMaxAge();
} else if (exp != null) {
Date date = DateUtil.parseDate(exp);
expires = (int) ((date.getTime() - System.currentTimeMillis()) / 1000);
}
if (cc != null) {
old.getHeaders().putSingle(HttpHeaders.CACHE_CONTROL, cc);
}
if (exp != null) {
old.getHeaders().putSingle(HttpHeaders.CACHE_CONTROL, exp);
}
String lastModified =
(String) response.getResponseHeaders().getFirst(HttpHeaders.LAST_MODIFIED);
String etag = (String) response.getResponseHeaders().getFirst(HttpHeaders.ETAG);
if (etag == null) etag = old.getHeaders().getFirst(HttpHeaders.ETAG);
else old.getHeaders().putSingle(HttpHeaders.ETAG, etag);
if (lastModified != null) {
old.getHeaders().putSingle(HttpHeaders.LAST_MODIFIED, lastModified);
}
if (etag == null && lastModified == null && cc == null && exp == null) // don't cache
{
return createClientResponse(request, old);
}
BrowserCache.Entry entry =
cache.put(
request.getUri(),
old.getMediaType(),
old.getHeaders(),
old.getCached(),
expires,
etag,
lastModified);
return createClientResponse(request, entry);
}
public ClientResponse cacheIfPossible(ClientRequest request, BaseClientResponse response)
throws Exception {
String cc = (String) response.getResponseHeaders().getFirst(HttpHeaders.CACHE_CONTROL);
String exp = (String) response.getResponseHeaders().getFirst(HttpHeaders.EXPIRES);
int expires = -1;
if (cc != null) {
CacheControl cacheControl = CacheControl.valueOf(cc);
if (cacheControl.isNoCache()) return response;
expires = cacheControl.getMaxAge();
} else if (exp != null) {
Date date = DateUtil.parseDate(exp);
expires = (int) ((date.getTime() - System.currentTimeMillis()) / 1000);
}
String lastModified =
(String) response.getResponseHeaders().getFirst(HttpHeaders.LAST_MODIFIED);
String etag = (String) response.getResponseHeaders().getFirst(HttpHeaders.ETAG);
String contentType = (String) response.getResponseHeaders().getFirst(HttpHeaders.CONTENT_TYPE);
byte[] cached =
ReadFromStream.readFromStream(1024, response.getStreamFactory().getInputStream());
response.getStreamFactory().performReleaseConnection();
MediaType mediaType = MediaType.valueOf(contentType);
final BrowserCache.Entry entry =
cache.put(
request.getUri(),
mediaType,
response.getResponseHeaders(),
cached,
expires,
etag,
lastModified);
response.setStreamFactory(new CachedStreamFactory(entry));
return response;
}
@Override
public Date getDate() {
String date = requestHeaders.getFirst(DATE);
if (date == null) return null;
return DateUtil.parseDate(date);
}
@Override
public String toString(Date value) {
if (value == null) throw new IllegalArgumentException("param was null");
return DateUtil.formatDate(value);
}
@Override
public Date fromString(String value) {
if (value == null) throw new IllegalArgumentException("param was null");
return DateUtil.parseDate(value);
}