/**
* Send a file (with zero-copy) to the client. This method doesn't provide any security guarantee.
* The caller is responsible for the argument they pass in.
*
* @param status The status of the request (e.g. 200 OK or 404 Not Found).
* @param path The path to the file to send to the client.
* @param max_age The expiration time of this entity, in seconds. This is not a timestamp, it's
* how old the resource is allowed to be in the client cache. See RFC 2616 section 14.9 for
* more information. Use 0 to disable caching.
*/
public void sendFile(final HttpResponseStatus status, final String path, final int max_age)
throws IOException {
if (max_age < 0) {
throw new IllegalArgumentException("Negative max_age=" + max_age + " for path=" + path);
}
if (!chan.isConnected()) {
done();
return;
}
RandomAccessFile file;
try {
file = new RandomAccessFile(path, "r");
} catch (FileNotFoundException e) {
logWarn("File not found: " + e.getMessage());
if (querystring != null) {
querystring.remove("png"); // Avoid potential recursion.
}
notFound();
return;
}
final long length = file.length();
{
final DefaultHttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, status);
final String mimetype = guessMimeTypeFromUri(path);
response.setHeader(
HttpHeaders.Names.CONTENT_TYPE, mimetype == null ? "text/plain" : mimetype);
final long mtime = new File(path).lastModified();
if (mtime > 0) {
response.setHeader(HttpHeaders.Names.AGE, (System.currentTimeMillis() - mtime) / 1000);
} else {
logWarn("Found a file with mtime=" + mtime + ": " + path);
}
response.setHeader(
HttpHeaders.Names.CACHE_CONTROL, max_age == 0 ? "no-cache" : "max-age=" + max_age);
HttpHeaders.setContentLength(response, length);
chan.write(response);
}
final DefaultFileRegion region = new DefaultFileRegion(file.getChannel(), 0, length);
final ChannelFuture future = chan.write(region);
future.addListener(
new ChannelFutureListener() {
public void operationComplete(final ChannelFuture future) {
region.releaseExternalResources();
done();
}
});
if (!HttpHeaders.isKeepAlive(request)) {
future.addListener(ChannelFutureListener.CLOSE);
}
}
/**
* Sends an HTTP reply to the client.
*
* @param status The status of the request (e.g. 200 OK or 404 Not Found).
* @param buf The content of the reply to send.
*/
private void sendBuffer(final HttpResponseStatus status, final ChannelBuffer buf) {
if (!chan.isConnected()) {
done();
return;
}
final DefaultHttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, status);
response.setHeader(HttpHeaders.Names.CONTENT_TYPE, guessMimeType(buf));
// TODO(tsuna): Server, X-Backend, etc. headers.
response.setContent(buf);
final boolean keepalive = HttpHeaders.isKeepAlive(request);
if (keepalive) {
HttpHeaders.setContentLength(response, buf.readableBytes());
}
final ChannelFuture future = chan.write(response);
if (!keepalive) {
future.addListener(ChannelFutureListener.CLOSE);
}
done();
}