@Override
public long lastModifiedMillis() {
final long newLastModifiedMillis = e.lastModifiedMillis();
if (newLastModifiedMillis != cachedLastModifiedMillis) {
cachedLastModifiedMillis = newLastModifiedMillis;
destroyContent();
}
return newLastModifiedMillis;
}
@Override
public synchronized ByteBuf readContent(ByteBufAllocator alloc) throws IOException {
if (cachedContent == null) {
final ByteBuf newContent = e.readContent(alloc);
if (newContent.readableBytes() > maxCacheEntrySizeBytes) {
// Do not cache if the content is too large.
return newContent;
}
cachedContent = newContent;
}
return cachedContent.duplicate().retain();
}
@Override
public void invoke(
ServiceInvocationContext ctx, Executor blockingTaskExecutor, Promise<Object> promise)
throws Exception {
final HttpRequest req = ctx.originalRequest();
if (req.method() != HttpMethod.GET) {
respond(
ctx,
promise,
HttpResponseStatus.METHOD_NOT_ALLOWED,
0,
ERROR_MIME_TYPE,
Unpooled.wrappedBuffer(CONTENT_METHOD_NOT_ALLOWED));
return;
}
final String path = normalizePath(ctx.mappedPath());
if (path == null) {
respond(
ctx,
promise,
HttpResponseStatus.NOT_FOUND,
0,
ERROR_MIME_TYPE,
Unpooled.wrappedBuffer(CONTENT_NOT_FOUND));
return;
}
Entry entry = getEntry(path);
long lastModifiedMillis;
if ((lastModifiedMillis = entry.lastModifiedMillis()) == 0) {
boolean found = false;
if (path.charAt(path.length() - 1) == '/') {
// Try index.html if it was a directory access.
entry = getEntry(path + "index.html");
if ((lastModifiedMillis = entry.lastModifiedMillis()) != 0) {
found = true;
}
}
if (!found) {
respond(
ctx,
promise,
HttpResponseStatus.NOT_FOUND,
0,
ERROR_MIME_TYPE,
Unpooled.wrappedBuffer(CONTENT_NOT_FOUND));
return;
}
}
long ifModifiedSinceMillis = Long.MIN_VALUE;
try {
ifModifiedSinceMillis =
req.headers().getTimeMillis(HttpHeaderNames.IF_MODIFIED_SINCE, Long.MIN_VALUE);
} catch (Exception e) {
// Ignore the ParseException, which is raised on malformed date.
//noinspection ConstantConditions
if (!(e instanceof ParseException)) {
throw e;
}
}
// HTTP-date does not have subsecond-precision; add 999ms to it.
if (ifModifiedSinceMillis > Long.MAX_VALUE - 999) {
ifModifiedSinceMillis = Long.MAX_VALUE;
} else {
ifModifiedSinceMillis += 999;
}
if (lastModifiedMillis < ifModifiedSinceMillis) {
respond(
ctx,
promise,
HttpResponseStatus.NOT_MODIFIED,
lastModifiedMillis,
entry.mimeType(),
Unpooled.EMPTY_BUFFER);
return;
}
respond(
ctx,
promise,
HttpResponseStatus.OK,
lastModifiedMillis,
entry.mimeType(),
entry.readContent(ctx.alloc()));
}
@Override
public String toString() {
return e.toString();
}
@Override
public String mimeType() {
return e.mimeType();
}
CachedEntry(Entry e, int maxCacheEntrySizeBytes) {
this.e = e;
this.maxCacheEntrySizeBytes = maxCacheEntrySizeBytes;
cachedLastModifiedMillis = e.lastModifiedMillis();
}