Package org.eclipse.jgit.http.server

Source Code of org.eclipse.jgit.http.server.ReceivePackServlet$InfoRefs

/*
* Copyright (C) 2009-2010, Google Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above
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*   names of its contributors may be used to endorse or promote
*   products derived from this software without specific prior
*   written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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package org.eclipse.jgit.http.server;

import static javax.servlet.http.HttpServletResponse.SC_BAD_REQUEST;
import static javax.servlet.http.HttpServletResponse.SC_FORBIDDEN;
import static javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
import static javax.servlet.http.HttpServletResponse.SC_UNAUTHORIZED;
import static javax.servlet.http.HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE;
import static org.eclipse.jgit.http.server.ClientVersionUtil.hasChunkedEncodingRequestBug;
import static org.eclipse.jgit.http.server.ClientVersionUtil.hasPushStatusBug;
import static org.eclipse.jgit.http.server.ClientVersionUtil.parseVersion;
import static org.eclipse.jgit.http.server.GitSmartHttpTools.RECEIVE_PACK;
import static org.eclipse.jgit.http.server.GitSmartHttpTools.RECEIVE_PACK_REQUEST_TYPE;
import static org.eclipse.jgit.http.server.GitSmartHttpTools.RECEIVE_PACK_RESULT_TYPE;
import static org.eclipse.jgit.http.server.GitSmartHttpTools.sendError;
import static org.eclipse.jgit.http.server.ServletUtils.ATTRIBUTE_HANDLER;
import static org.eclipse.jgit.http.server.ServletUtils.consumeRequestBody;
import static org.eclipse.jgit.http.server.ServletUtils.getInputStream;
import static org.eclipse.jgit.http.server.ServletUtils.getRepository;
import static org.eclipse.jgit.util.HttpSupport.HDR_USER_AGENT;

import java.io.IOException;
import java.util.List;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jgit.errors.UnpackException;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.ReceivePack;
import org.eclipse.jgit.transport.RefAdvertiser.PacketLineOutRefAdvertiser;
import org.eclipse.jgit.transport.resolver.ReceivePackFactory;
import org.eclipse.jgit.transport.resolver.ServiceNotAuthorizedException;
import org.eclipse.jgit.transport.resolver.ServiceNotEnabledException;

/** Server side implementation of smart push over HTTP. */
class ReceivePackServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;

  static class InfoRefs extends SmartServiceInfoRefs {
    private final ReceivePackFactory<HttpServletRequest> receivePackFactory;

    InfoRefs(ReceivePackFactory<HttpServletRequest> receivePackFactory,
        List<Filter> filters) {
      super(RECEIVE_PACK, filters);
      this.receivePackFactory = receivePackFactory;
    }

    @Override
    protected void begin(HttpServletRequest req, Repository db)
        throws IOException, ServiceNotEnabledException,
        ServiceNotAuthorizedException {
      ReceivePack rp = receivePackFactory.create(req, db);
      req.setAttribute(ATTRIBUTE_HANDLER, rp);
    }

    @Override
    protected void advertise(HttpServletRequest req,
        PacketLineOutRefAdvertiser pck) throws IOException,
        ServiceNotEnabledException, ServiceNotAuthorizedException {
      ReceivePack rp = (ReceivePack) req.getAttribute(ATTRIBUTE_HANDLER);
      try {
        rp.sendAdvertisedRefs(pck);
      } finally {
        rp.getRevWalk().release();
      }
    }
  }

  static class Factory implements Filter {
    private final ReceivePackFactory<HttpServletRequest> receivePackFactory;

    Factory(ReceivePackFactory<HttpServletRequest> receivePackFactory) {
      this.receivePackFactory = receivePackFactory;
    }

    public void doFilter(ServletRequest request, ServletResponse response,
        FilterChain chain) throws IOException, ServletException {
      HttpServletRequest req = (HttpServletRequest) request;
      HttpServletResponse rsp = (HttpServletResponse) response;
      ReceivePack rp;
      try {
        rp = receivePackFactory.create(req, getRepository(req));
      } catch (ServiceNotAuthorizedException e) {
        rsp.sendError(SC_UNAUTHORIZED);
        return;

      } catch (ServiceNotEnabledException e) {
        sendError(req, rsp, SC_FORBIDDEN);
        return;
      }

      try {
        req.setAttribute(ATTRIBUTE_HANDLER, rp);
        chain.doFilter(req, rsp);
      } finally {
        req.removeAttribute(ATTRIBUTE_HANDLER);
      }
    }

    public void init(FilterConfig filterConfig) throws ServletException {
      // Nothing.
    }

    public void destroy() {
      // Nothing.
    }
  }

  @Override
  public void doPost(final HttpServletRequest req,
      final HttpServletResponse rsp) throws IOException {
    if (!RECEIVE_PACK_REQUEST_TYPE.equals(req.getContentType())) {
      rsp.sendError(SC_UNSUPPORTED_MEDIA_TYPE);
      return;
    }

    int[] version = parseVersion(req.getHeader(HDR_USER_AGENT));
    if (hasChunkedEncodingRequestBug(version, req)) {
      GitSmartHttpTools.sendError(req, rsp, SC_BAD_REQUEST, "\n\n"
          + HttpServerText.get().clientHas175ChunkedEncodingBug);
      return;
    }

    SmartOutputStream out = new SmartOutputStream(req, rsp) {
      @Override
      public void flush() throws IOException {
        doFlush();
      }
    };

    ReceivePack rp = (ReceivePack) req.getAttribute(ATTRIBUTE_HANDLER);
    try {
      rp.setBiDirectionalPipe(false);
      rp.setEchoCommandFailures(hasPushStatusBug(version));
      rsp.setContentType(RECEIVE_PACK_RESULT_TYPE);

      rp.receive(getInputStream(req), out, null);
      out.close();
    } catch (UnpackException e) {
      // This should be already reported to the client.
      getServletContext().log(
          HttpServerText.get().internalErrorDuringReceivePack,
          e.getCause());
      consumeRequestBody(req);
      out.close();

    } catch (Throwable e) {
      getServletContext().log(HttpServerText.get().internalErrorDuringReceivePack, e);
      if (!rsp.isCommitted()) {
        rsp.reset();
        sendError(req, rsp, SC_INTERNAL_SERVER_ERROR);
      }
      return;
    }
  }
}
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