GitSmartHttpTools: Do not use sideband when sending an error
Unlike ReceivePack, the V0/V1 UploadPack response does not support sideband except for the packfile parts. By sending an error in a sideband packet, the JGit client says "Expected ACK/NACK, got: ...". Use an error packet always. The recent Git clients will understand it better than out-of-context sideband packets. Change-Id: Ied6787973d3b6860c0b95c7910d4e4312bb7a184 Signed-off-by: Masaya Suzuki <masayasuzuki@google.com>
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@ -48,8 +48,6 @@
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import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
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import static org.eclipse.jgit.http.server.ServletUtils.ATTRIBUTE_HANDLER;
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import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_SIDE_BAND_64K;
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import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_SIDE_BAND;
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import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_SIDE_BAND_64K;
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import static org.eclipse.jgit.transport.SideBandOutputStream.CH_ERROR;
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import static org.eclipse.jgit.transport.SideBandOutputStream.SMALL_BUF;
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@ -64,14 +62,12 @@
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import javax.servlet.http.HttpServletResponse;
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import org.eclipse.jgit.internal.transport.parser.FirstCommand;
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import org.eclipse.jgit.internal.transport.parser.FirstWant;
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import org.eclipse.jgit.lib.Constants;
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import org.eclipse.jgit.transport.PacketLineIn;
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import org.eclipse.jgit.transport.PacketLineOut;
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import org.eclipse.jgit.transport.ReceivePack;
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import org.eclipse.jgit.transport.RequestNotYetReadException;
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import org.eclipse.jgit.transport.SideBandOutputStream;
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import org.eclipse.jgit.transport.UploadPack;
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/**
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* Utility functions for handling the Git-over-HTTP protocol.
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@ -220,44 +216,15 @@ private static void sendInfoRefsError(HttpServletRequest req,
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private static void sendUploadPackError(HttpServletRequest req,
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HttpServletResponse res, String textForGit) throws IOException {
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// Do not use sideband. Sideband is acceptable only while packfile is
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// being sent. Other places, like acknowledgement section, do not
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// support sideband. Use an error packet.
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ByteArrayOutputStream buf = new ByteArrayOutputStream(128);
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PacketLineOut pckOut = new PacketLineOut(buf);
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boolean sideband;
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UploadPack up = (UploadPack) req.getAttribute(ATTRIBUTE_HANDLER);
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if (up != null) {
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try {
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sideband = up.isSideBand();
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} catch (RequestNotYetReadException e) {
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sideband = isUploadPackSideBand(req);
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}
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} else
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sideband = isUploadPackSideBand(req);
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if (sideband)
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writeSideBand(buf, textForGit);
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else
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writePacket(pckOut, textForGit);
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writePacket(pckOut, textForGit);
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send(req, res, UPLOAD_PACK_RESULT_TYPE, buf.toByteArray());
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}
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private static boolean isUploadPackSideBand(HttpServletRequest req) {
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try {
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// The client may be in a state where they have sent the sideband
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// capability and are expecting a response in the sideband, but we might
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// not have an UploadPack, or it might not have read any of the request.
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// So, cheat and read the first line.
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String line = new PacketLineIn(req.getInputStream()).readString();
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FirstWant parsed = FirstWant.fromLine(line);
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return (parsed.getCapabilities().contains(OPTION_SIDE_BAND)
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|| parsed.getCapabilities().contains(OPTION_SIDE_BAND_64K));
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} catch (IOException e) {
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// Probably the connection is closed and a subsequent write will fail, but
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// try it just in case.
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return false;
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}
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}
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private static void sendReceivePackError(HttpServletRequest req,
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HttpServletResponse res, String textForGit) throws IOException {
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ByteArrayOutputStream buf = new ByteArrayOutputStream(128);
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@ -308,7 +275,7 @@ private static void writeSideBand(OutputStream out, String textForGit)
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private static void writePacket(PacketLineOut pckOut, String textForGit)
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throws IOException {
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pckOut.writeString("error: " + textForGit);
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pckOut.writeString("ERR " + textForGit);
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}
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private static void send(HttpServletRequest req, HttpServletResponse res,
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