/**
* Copies passed in {@link Request} and but sets action to GET and removes all supported
* conditions making the GET request "unconditional". This method must be in sync with {@link
* #requestPredicate(Request)} and process same conditions.
*/
@Nonnull
public static Request copyAsUnconditionalGet(@Nonnull final Request request) {
checkNotNull(request);
final Request getRequest = new Request.Builder().copy(request).action(GET).build();
getRequest.getHeaders().remove(HttpHeaders.IF_MODIFIED_SINCE);
getRequest.getHeaders().remove(HttpHeaders.IF_UNMODIFIED_SINCE);
getRequest.getHeaders().remove(HttpHeaders.IF_MATCH);
getRequest.getHeaders().remove(HttpHeaders.IF_NONE_MATCH);
return getRequest;
}
@Nullable
private static Predicate<Response> ifNoneMatch(final Request request) {
final String match = request.getHeaders().get(HttpHeaders.IF_NONE_MATCH);
if (match != null && !"*".equals(match)) {
return new Predicate<Response>() {
@Override
public boolean apply(final Response response) {
final String etag = response.getHeaders().get(HttpHeaders.ETAG);
if (etag != null) {
return !match.contains(etag);
}
return true;
}
@Override
public String toString() {
return HttpConditions.class.getSimpleName() + ".ifNoneMatch(" + match + ")";
}
};
}
return null;
}
@Nullable
private static Predicate<Response> ifModifiedSince(final Request request) {
final DateTime date = parseDateHeader(request.getHeaders().get(HttpHeaders.IF_MODIFIED_SINCE));
if (date != null) {
return new Predicate<Response>() {
@Override
public boolean apply(final Response response) {
final DateTime lastModified =
parseDateHeader(response.getHeaders().get(HttpHeaders.LAST_MODIFIED));
if (lastModified != null) {
return lastModified.isAfter(date);
}
return true;
}
@Override
public String toString() {
return HttpConditions.class.getSimpleName() + ".ifModifiedSince(" + date + ")";
}
};
}
return null;
}