/**
* Check if passed {@link HttpContent} is {@link HttpTrailer}, which represents trailer chunk
* (when chunked Transfer-Encoding is used), if it is a trailer chunk - then copy all the
* available trailer headers to request headers map.
*
* @param httpContent
*/
private static void checkHttpTrailer(final HttpContent httpContent) {
if (HttpTrailer.isTrailer(httpContent)) {
final HttpTrailer httpTrailer = (HttpTrailer) httpContent;
final HttpHeader httpHeader = httpContent.getHttpHeader();
final MimeHeaders trailerHeaders = httpTrailer.getHeaders();
final int size = trailerHeaders.size();
for (int i = 0; i < size; i++) {
httpHeader.addHeader(
trailerHeaders.getName(i).toString(), trailerHeaders.getValue(i).toString());
}
}
}
/**
* Used to add additional HTTP message chunk content to {@link #inputContentBuffer}.
*
* @param requestedLen how much content should attempt to be read, <code>-1</code> means read till
* the end of the message.
* @return the number of bytes actually read
* @throws IOException if an I/O error occurs while reading content
*/
private int fill(final int requestedLen) throws IOException {
int read = 0;
while ((requestedLen == -1 || read < requestedLen) && httpHeader.isExpectContent()) {
final HttpContent c = blockingRead();
final boolean isLast = c.isLast();
// Check if HttpContent is chunked message trailer w/ headers
checkHttpTrailer(c);
final Buffer b;
try {
b = c.getContent();
} catch (HttpBrokenContentException e) {
final Throwable cause = e.getCause();
throw Exceptions.makeIOException(cause != null ? cause : e);
}
read += b.remaining();
updateInputContentBuffer(b);
c.recycle();
if (isLast) {
finished();
break;
}
}
if (read > 0 || requestedLen == 0) {
return read;
}
return -1;
}
/** @see java.io.Reader#ready() */
public boolean ready() {
if (closed) {
return false;
}
if (!processingChars) {
throw new IllegalStateException();
}
return (inputContentBuffer.hasRemaining() || httpHeader.isExpectContent());
}
/**
* This method should be called if the InputBuffer is being used in conjunction with a {@link
* java.io.Reader} implementation. If this method is not called, any character-based methods
* called on this <code>InputBuffer</code> will throw a {@link IllegalStateException}.
*/
public void processingChars() {
if (!processingChars) {
processingChars = true;
final String enc = httpHeader.getCharacterEncoding();
if (enc != null) {
encoding = enc;
final CharsetDecoder localDecoder = getDecoder();
averageCharsPerByte = localDecoder.averageCharsPerByte();
}
}
}
/**
* Method invoked when a first massage (Assumed to be HTTP) is received. Normally this would be
* HTTP CONNECT and this method processes it and opens a connection to the destination (the server
* that the client wants to access).
*
* <p>This method can be overridden to provide a test-specific handling of the CONNECT method.
*/
protected NextAction handleConnect(FilterChainContext ctx, HttpContent content) {
System.out.println("Handle CONNECT start . . .");
HttpHeader httpHeader = content.getHttpHeader();
HttpRequestPacket requestPacket = (HttpRequestPacket) httpHeader.getHttpHeader();
if (!requestPacket.getMethod().matchesMethod("CONNECT")) {
System.out.println("Received method is not CONNECT");
writeHttpResponse(ctx, 400);
return ctx.getStopAction();
}
String destinationUri = requestPacket.getRequestURI();
// We expect URI in form host:port, this is not flexible, but we use it only to test our clients
int colonIdx = destinationUri.indexOf(':');
if (colonIdx == -1) {
System.out.println("Destination URI not in host:port format: " + destinationUri);
writeHttpResponse(ctx, 400);
return ctx.getStopAction();
}
String hostName = destinationUri.substring(0, colonIdx);
String portStr = destinationUri.substring(colonIdx + 1);
int port;
try {
port = Integer.parseInt(portStr);
} catch (Throwable t) {
System.out.println("Could not parse destination port: " + portStr);
writeHttpResponse(ctx, 400);
return ctx.getStopAction();
}
try {
Socket tunnelSocket = new Socket(hostName, port);
Connection grizzlyConnection = ctx.getConnection();
tunnelSockets.set(grizzlyConnection, tunnelSocket);
TunnelSocketReader tunnelSocketReader =
new TunnelSocketReader(tunnelSocket, grizzlyConnection);
executorService.submit(tunnelSocketReader::read);
} catch (IOException e) {
writeHttpResponse(ctx, 400);
return ctx.getStopAction();
}
// Grizzly does not like CONNECT method and sets "keep alive" to false, if it is present
// This hacks Grizzly, so it will keep the connection open
HttpRequestPacket request = getHttpRequest(ctx);
request.getResponse().getProcessingState().setKeepAlive(true);
request.getResponse().setContentLength(0);
request.setMethod("GET");
// end of hack
writeHttpResponse(ctx, 200);
System.out.println("Connection to proxy established.");
return ctx.getStopAction();
}
/**
* Used to convert bytes to chars.
*
* @param requestedLen how much content should attempt to be read
* @return the number of chars actually read
* @throws IOException if an I/O error occurs while reading content
*/
private int fillChars(final int requestedLen, final CharBuffer dst) throws IOException {
int read = 0;
// 1) Check pre-decoded singleCharBuf
if (dst != singleCharBuf && singleCharBuf.hasRemaining()) {
dst.put(singleCharBuf.get());
read = 1;
}
// 2) Decode available byte[] -> char[]
if (inputContentBuffer.hasRemaining()) {
read += fillAvailableChars(requestedLen - read, dst);
}
if (read >= requestedLen) {
dst.flip();
return read;
}
// 3) If we don't expect more data - return what we've read so far
if (!httpHeader.isExpectContent()) {
dst.flip();
return read > 0 ? read : -1;
}
// 4) Try to read more data (we may block)
CharsetDecoder decoderLocal = getDecoder();
boolean isNeedMoreInput =
false; // true, if content in composite buffer is not enough to produce even 1 char
boolean last = false;
while (read < requestedLen && httpHeader.isExpectContent()) {
if (isNeedMoreInput || !inputContentBuffer.hasRemaining()) {
final HttpContent c = blockingRead();
updateInputContentBuffer(c.getContent());
last = c.isLast();
c.recycle();
isNeedMoreInput = false;
}
final ByteBuffer bytes = inputContentBuffer.toByteBuffer();
final int bytesPos = bytes.position();
final int dstPos = dst.position();
final CoderResult result = decoderLocal.decode(bytes, dst, false);
final int producedChars = dst.position() - dstPos;
final int consumedBytes = bytes.position() - bytesPos;
read += producedChars;
if (consumedBytes > 0) {
bytes.position(bytesPos);
inputContentBuffer.position(inputContentBuffer.position() + consumedBytes);
if (readAheadLimit == -1) {
inputContentBuffer.shrink();
}
} else {
isNeedMoreInput = true;
}
if (last || result == CoderResult.OVERFLOW) {
break;
}
}
dst.flip();
if (last && read == 0) {
read = -1;
}
return read;
}