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CoyoteAdapter.javaAPI DocApache Tomcat 6.0.1428591Fri Jul 20 04:20:34 BST 2007org.apache.catalina.connector

CoyoteAdapter

public class CoyoteAdapter extends Object implements org.apache.coyote.Adapter
Implementation of a request processor which delegates the processing to a Coyote processor.
author
Craig R. McClanahan
author
Remy Maucherat
version
$Revision: 555304 $ $Date: 2007-07-11 17:28:52 +0200 (mer., 11 juil. 2007) $

Fields Summary
private static org.apache.juli.logging.Log
log
public static final int
ADAPTER_NOTES
protected static final boolean
ALLOW_BACKSLASH
private Connector
connector
The CoyoteConnector with which this processor is associated.
private static final String
match
The match string for identifying a session ID parameter.
protected org.apache.catalina.util.StringManager
sm
The string manager for this package.
Constructors Summary
public CoyoteAdapter(Connector connector)
Construct a new CoyoteProcessor associated with the specified connector.

param
connector CoyoteConnector that owns this processor



    // ----------------------------------------------------------- Constructors


                         
       

        super();
        this.connector = connector;
Methods Summary
protected voidconvertMB(org.apache.tomcat.util.buf.MessageBytes mb)
Character conversion of the a US-ASCII MessageBytes.


        // This is of course only meaningful for bytes
        if (mb.getType() != MessageBytes.T_BYTES)
            return;
        
        ByteChunk bc = mb.getByteChunk();
        CharChunk cc = mb.getCharChunk();
        int length = bc.getLength();
        cc.allocate(length, -1);

        // Default encoding: fast conversion
        byte[] bbuf = bc.getBuffer();
        char[] cbuf = cc.getBuffer();
        int start = bc.getStart();
        for (int i = 0; i < length; i++) {
            cbuf[i] = (char) (bbuf[i + start] & 0xff);
        }
        mb.setChars(cbuf, 0, length);
protected voidconvertURI(org.apache.tomcat.util.buf.MessageBytes uri, Request request)
Character conversion of the URI.


        ByteChunk bc = uri.getByteChunk();
        int length = bc.getLength();
        CharChunk cc = uri.getCharChunk();
        cc.allocate(length, -1);

        String enc = connector.getURIEncoding();
        if (enc != null) {
            B2CConverter conv = request.getURIConverter();
            try {
                if (conv == null) {
                    conv = new B2CConverter(enc);
                    request.setURIConverter(conv);
                } else {
                    conv.recycle();
                }
            } catch (IOException e) {
                // Ignore
                log.error("Invalid URI encoding; using HTTP default");
                connector.setURIEncoding(null);
            }
            if (conv != null) {
                try {
                    conv.convert(bc, cc);
                    uri.setChars(cc.getBuffer(), cc.getStart(), 
                                 cc.getLength());
                    return;
                } catch (IOException e) {
                    log.error("Invalid URI character encoding; trying ascii");
                    cc.recycle();
                }
            }
        }

        // Default encoding: fast conversion
        byte[] bbuf = bc.getBuffer();
        char[] cbuf = cc.getBuffer();
        int start = bc.getStart();
        for (int i = 0; i < length; i++) {
            cbuf[i] = (char) (bbuf[i + start] & 0xff);
        }
        uri.setChars(cbuf, 0, length);
protected static voidcopyBytes(byte[] b, int dest, int src, int len)
Copy an array of bytes to a different position. Used during normalization.

        for (int pos = 0; pos < len; pos++) {
            b[pos + dest] = b[pos + src];
        }
public booleanevent(org.apache.coyote.Request req, org.apache.coyote.Response res, org.apache.tomcat.util.net.SocketStatus status)
Event method.

return
false to indicate an error, expected or not



    // -------------------------------------------------------- Adapter Methods

    
                     
        
                

        Request request = (Request) req.getNote(ADAPTER_NOTES);
        Response response = (Response) res.getNote(ADAPTER_NOTES);

        if (request.getWrapper() != null) {
            
            boolean error = false;
            boolean read = false;
            try {
                if (status == SocketStatus.OPEN) {
                    if (response.isClosed()) {
                        // The event has been closed asynchronously, so call end instead of
                        // read to cleanup the pipeline
                        request.getEvent().setEventType(CometEvent.EventType.END);
                        request.getEvent().setEventSubType(null);
                    } else {
                        try {
                            // Fill the read buffer of the servlet layer
                            if (request.read()) {
                                read = true;
                            }
                        } catch (IOException e) {
                            error = true;
                        }
                        if (read) {
                            request.getEvent().setEventType(CometEvent.EventType.READ);
                            request.getEvent().setEventSubType(null);
                        } else if (error) {
                            request.getEvent().setEventType(CometEvent.EventType.ERROR);
                            request.getEvent().setEventSubType(CometEvent.EventSubType.CLIENT_DISCONNECT);
                        } else {
                            request.getEvent().setEventType(CometEvent.EventType.END);
                            request.getEvent().setEventSubType(null);
                        }
                    }
                } else if (status == SocketStatus.DISCONNECT) {
                    request.getEvent().setEventType(CometEvent.EventType.ERROR);
                    request.getEvent().setEventSubType(CometEvent.EventSubType.CLIENT_DISCONNECT);
                    error = true;
                } else if (status == SocketStatus.ERROR) {
                    request.getEvent().setEventType(CometEvent.EventType.ERROR);
                    request.getEvent().setEventSubType(CometEvent.EventSubType.IOEXCEPTION);
                    error = true;
                } else if (status == SocketStatus.STOP) {
                    request.getEvent().setEventType(CometEvent.EventType.END);
                    request.getEvent().setEventSubType(CometEvent.EventSubType.SERVER_SHUTDOWN);
                } else if (status == SocketStatus.TIMEOUT) {
                    if (response.isClosed()) {
                        // The event has been closed asynchronously, so call end instead of
                        // read to cleanup the pipeline
                        request.getEvent().setEventType(CometEvent.EventType.END);
                        request.getEvent().setEventSubType(null);
                    } else {
                        request.getEvent().setEventType(CometEvent.EventType.ERROR);
                        request.getEvent().setEventSubType(CometEvent.EventSubType.TIMEOUT);
                    }
                }

                req.getRequestProcessor().setWorkerThreadName(Thread.currentThread().getName());
                
                // Calling the container
                connector.getContainer().getPipeline().getFirst().event(request, response, request.getEvent());

                if (!error && !response.isClosed() && (request.getAttribute(Globals.EXCEPTION_ATTR) != null)) {
                    // An unexpected exception occurred while processing the event, so
                    // error should be called
                    request.getEvent().setEventType(CometEvent.EventType.ERROR);
                    request.getEvent().setEventSubType(null);
                    error = true;
                    connector.getContainer().getPipeline().getFirst().event(request, response, request.getEvent());
                }
                if (response.isClosed() || !request.isComet()) {
                    res.action(ActionCode.ACTION_COMET_END, null);
                } else if (!error && read && request.getAvailable()) {
                    // If this was a read and not all bytes have been read, or if no data
                    // was read from the connector, then it is an error
                    request.getEvent().setEventType(CometEvent.EventType.ERROR);
                    request.getEvent().setEventSubType(CometEvent.EventSubType.IOEXCEPTION);
                    error = true;
                    connector.getContainer().getPipeline().getFirst().event(request, response, request.getEvent());
                }
                return (!error);
            } catch (Throwable t) {
                if (!(t instanceof IOException)) {
                    log.error(sm.getString("coyoteAdapter.service"), t);
                }
                error = true;
                return false;
            } finally {
                req.getRequestProcessor().setWorkerThreadName(null);
                // Recycle the wrapper request and response
                if (error || response.isClosed() || !request.isComet()) {
                    request.recycle();
                    request.setFilterChain(null);
                    response.recycle();
                }
            }
            
        } else {
            return false;
        }
public static booleannormalize(org.apache.tomcat.util.buf.MessageBytes uriMB)
Normalize URI.

This method normalizes "\", "//", "/./" and "/../". This method will return false when trying to go above the root, or if the URI contains a null byte.

param
uriMB URI to be normalized


        ByteChunk uriBC = uriMB.getByteChunk();
        byte[] b = uriBC.getBytes();
        int start = uriBC.getStart();
        int end = uriBC.getEnd();

        // URL * is acceptable
        if ((end - start == 1) && b[start] == (byte) '*")
          return true;

        int pos = 0;
        int index = 0;

        // Replace '\' with '/'
        // Check for null byte
        for (pos = start; pos < end; pos++) {
            if (b[pos] == (byte) '\\") {
                if (ALLOW_BACKSLASH) {
                    b[pos] = (byte) '/";
                } else {
                    return false;
                }
            }
            if (b[pos] == (byte) 0) {
                return false;
            }
        }

        // The URL must start with '/'
        if (b[start] != (byte) '/") {
            return false;
        }

        // Replace "//" with "/"
        for (pos = start; pos < (end - 1); pos++) {
            if (b[pos] == (byte) '/") {
                while ((pos + 1 < end) && (b[pos + 1] == (byte) '/")) {
                    copyBytes(b, pos, pos + 1, end - pos - 1);
                    end--;
                }
            }
        }

        // If the URI ends with "/." or "/..", then we append an extra "/"
        // Note: It is possible to extend the URI by 1 without any side effect
        // as the next character is a non-significant WS.
        if (((end - start) >= 2) && (b[end - 1] == (byte) '.")) {
            if ((b[end - 2] == (byte) '/") 
                || ((b[end - 2] == (byte) '.") 
                    && (b[end - 3] == (byte) '/"))) {
                b[end] = (byte) '/";
                end++;
            }
        }

        uriBC.setEnd(end);

        index = 0;

        // Resolve occurrences of "/./" in the normalized path
        while (true) {
            index = uriBC.indexOf("/./", 0, 3, index);
            if (index < 0)
                break;
            copyBytes(b, start + index, start + index + 2, 
                      end - start - index - 2);
            end = end - 2;
            uriBC.setEnd(end);
        }

        index = 0;

        // Resolve occurrences of "/../" in the normalized path
        while (true) {
            index = uriBC.indexOf("/../", 0, 4, index);
            if (index < 0)
                break;
            // Prevent from going outside our context
            if (index == 0)
                return false;
            int index2 = -1;
            for (pos = start + index - 1; (pos >= 0) && (index2 < 0); pos --) {
                if (b[pos] == (byte) '/") {
                    index2 = pos;
                }
            }
            copyBytes(b, start + index2, start + index + 3,
                      end - start - index - 3);
            end = end + index2 - index - 3;
            uriBC.setEnd(end);
            index = index2;
        }

        uriBC.setBytes(b, start, end);

        return true;
protected voidparseSessionCookiesId(org.apache.coyote.Request req, Request request)
Parse session id in URL.


        // Parse session id from cookies
        Cookies serverCookies = req.getCookies();
        int count = serverCookies.getCookieCount();
        if (count <= 0)
            return;

        for (int i = 0; i < count; i++) {
            ServerCookie scookie = serverCookies.getCookie(i);
            if (scookie.getName().equals(Globals.SESSION_COOKIE_NAME)) {
                // Override anything requested in the URL
                if (!request.isRequestedSessionIdFromCookie()) {
                    // Accept only the first session id cookie
                    convertMB(scookie.getValue());
                    request.setRequestedSessionId
                        (scookie.getValue().toString());
                    request.setRequestedSessionCookie(true);
                    request.setRequestedSessionURL(false);
                    if (log.isDebugEnabled())
                        log.debug(" Requested cookie session id is " +
                            request.getRequestedSessionId());
                } else {
                    if (!request.isRequestedSessionIdValid()) {
                        // Replace the session id until one is valid
                        convertMB(scookie.getValue());
                        request.setRequestedSessionId
                            (scookie.getValue().toString());
                    }
                }
            }
        }
protected voidparseSessionId(org.apache.coyote.Request req, Request request)
Parse session id in URL.


        ByteChunk uriBC = req.requestURI().getByteChunk();
        int semicolon = uriBC.indexOf(match, 0, match.length(), 0);

        if (semicolon > 0) {

            // Parse session ID, and extract it from the decoded request URI
            int start = uriBC.getStart();
            int end = uriBC.getEnd();

            int sessionIdStart = semicolon + match.length();
            int semicolon2 = uriBC.indexOf(';", sessionIdStart);
            if (semicolon2 >= 0) {
                request.setRequestedSessionId
                    (new String(uriBC.getBuffer(), start + sessionIdStart, 
                            semicolon2 - sessionIdStart));
                // Extract session ID from request URI
                byte[] buf = uriBC.getBuffer();
                for (int i = 0; i < end - start - semicolon2; i++) {
                    buf[start + semicolon + i] 
                        = buf[start + i + semicolon2];
                }
                uriBC.setBytes(buf, start, end - start - semicolon2 + semicolon);
            } else {
                request.setRequestedSessionId
                    (new String(uriBC.getBuffer(), start + sessionIdStart, 
                            (end - start) - sessionIdStart));
                uriBC.setEnd(start + semicolon);
            }
            request.setRequestedSessionURL(true);

        } else {
            request.setRequestedSessionId(null);
            request.setRequestedSessionURL(false);
        }
protected booleanpostParseRequest(org.apache.coyote.Request req, Request request, org.apache.coyote.Response res, Response response)
Parse additional request parameters.


        // XXX the processor needs to set a correct scheme and port prior to this point, 
        // in ajp13 protocols dont make sense to get the port from the connector..
        // XXX the processor may have set a correct scheme and port prior to this point, 
        // in ajp13 protocols dont make sense to get the port from the connector...
        // otherwise, use connector configuration
        if (! req.scheme().isNull()) {
            // use processor specified scheme to determine secure state
            request.setSecure(req.scheme().equals("https"));
        } else {
            // use connector scheme and secure configuration, (defaults to
            // "http" and false respectively)
            req.scheme().setString(connector.getScheme());
            request.setSecure(connector.getSecure());
        }

        // FIXME: the code below doesnt belongs to here, 
        // this is only have sense 
        // in Http11, not in ajp13..
        // At this point the Host header has been processed.
        // Override if the proxyPort/proxyHost are set 
        String proxyName = connector.getProxyName();
        int proxyPort = connector.getProxyPort();
        if (proxyPort != 0) {
            req.setServerPort(proxyPort);
        }
        if (proxyName != null) {
            req.serverName().setString(proxyName);
        }

        // Parse session Id
        parseSessionId(req, request);

        // URI decoding
        MessageBytes decodedURI = req.decodedURI();
        decodedURI.duplicate(req.requestURI());

        if (decodedURI.getType() == MessageBytes.T_BYTES) {
            // Remove any path parameters
            ByteChunk uriBB = decodedURI.getByteChunk();
            int semicolon = uriBB.indexOf(';", 0);
            if (semicolon > 0) {
                decodedURI.setBytes
                    (uriBB.getBuffer(), uriBB.getStart(), semicolon);
            }
            // %xx decoding of the URL
            try {
                req.getURLDecoder().convert(decodedURI, false);
            } catch (IOException ioe) {
                res.setStatus(400);
                res.setMessage("Invalid URI: " + ioe.getMessage());
                return false;
            }
            // Normalization
            if (!normalize(req.decodedURI())) {
                res.setStatus(400);
                res.setMessage("Invalid URI");
                return false;
            }
            // Character decoding
            convertURI(decodedURI, request);
        } else {
            // The URL is chars or String, and has been sent using an in-memory
            // protocol handler, we have to assume the URL has been properly
            // decoded already
            decodedURI.toChars();
            // Remove any path parameters
            CharChunk uriCC = decodedURI.getCharChunk();
            int semicolon = uriCC.indexOf(';");
            if (semicolon > 0) {
                decodedURI.setChars
                    (uriCC.getBuffer(), uriCC.getStart(), semicolon);
            }
        }

        // Set the remote principal
        String principal = req.getRemoteUser().toString();
        if (principal != null) {
            request.setUserPrincipal(new CoyotePrincipal(principal));
        }

        // Set the authorization type
        String authtype = req.getAuthType().toString();
        if (authtype != null) {
            request.setAuthType(authtype);
        }

        // Request mapping.
        MessageBytes serverName;
        if (connector.getUseIPVHosts()) {
            serverName = req.localName();
            if (serverName.isNull()) {
                // well, they did ask for it
                res.action(ActionCode.ACTION_REQ_LOCAL_NAME_ATTRIBUTE, null);
            }
        } else {
            serverName = req.serverName();
        }
        connector.getMapper().map(serverName, decodedURI, 
                                  request.getMappingData());
        request.setContext((Context) request.getMappingData().context);
        request.setWrapper((Wrapper) request.getMappingData().wrapper);

        // Filter trace method
        if (!connector.getAllowTrace() 
                && req.method().equalsIgnoreCase("TRACE")) {
            Wrapper wrapper = request.getWrapper();
            String header = null;
            if (wrapper != null) {
                String[] methods = wrapper.getServletMethods();
                if (methods != null) {
                    for (int i=0; i<methods.length; i++) {
                        if ("TRACE".equals(methods[i])) {
                            continue;
                        }
                        if (header == null) {
                            header = methods[i];
                        } else {
                            header += ", " + methods[i];
                        }
                    }
                }
            }                               
            res.setStatus(405);
            res.addHeader("Allow", header);
            res.setMessage("TRACE method is not allowed");
            return false;
        }

        // Possible redirect
        MessageBytes redirectPathMB = request.getMappingData().redirectPath;
        if (!redirectPathMB.isNull()) {
            String redirectPath = redirectPathMB.toString();
            String query = request.getQueryString();
            if (request.isRequestedSessionIdFromURL()) {
                // This is not optimal, but as this is not very common, it
                // shouldn't matter
                redirectPath = redirectPath + ";" + Globals.SESSION_PARAMETER_NAME + "=" 
                    + request.getRequestedSessionId();
            }
            if (query != null) {
                // This is not optimal, but as this is not very common, it
                // shouldn't matter
                redirectPath = redirectPath + "?" + query;
            }
            response.sendRedirect(redirectPath);
            return false;
        }

        // Parse session Id
        parseSessionCookiesId(req, request);

        return true;
public voidservice(org.apache.coyote.Request req, org.apache.coyote.Response res)
Service method.


        Request request = (Request) req.getNote(ADAPTER_NOTES);
        Response response = (Response) res.getNote(ADAPTER_NOTES);

        if (request == null) {

            // Create objects
            request = (Request) connector.createRequest();
            request.setCoyoteRequest(req);
            response = (Response) connector.createResponse();
            response.setCoyoteResponse(res);

            // Link objects
            request.setResponse(response);
            response.setRequest(request);

            // Set as notes
            req.setNote(ADAPTER_NOTES, request);
            res.setNote(ADAPTER_NOTES, response);

            // Set query string encoding
            req.getParameters().setQueryStringEncoding
                (connector.getURIEncoding());

        }

        if (connector.getXpoweredBy()) {
            response.addHeader("X-Powered-By", "Servlet/2.5");
        }

        boolean comet = false;
        
        try {

            // Parse and set Catalina and configuration specific 
            // request parameters
            req.getRequestProcessor().setWorkerThreadName(Thread.currentThread().getName());
            if (postParseRequest(req, request, res, response)) {
                // Calling the container
                connector.getContainer().getPipeline().getFirst().invoke(request, response);

                if (request.isComet()) {
                    if (!response.isClosed() && !response.isError()) {
                        if (request.getAvailable()) {
                            // Invoke a read event right away if there are available bytes
                            if (event(req, res, SocketStatus.OPEN)) {
                                comet = true;
                                res.action(ActionCode.ACTION_COMET_BEGIN, null);
                            }
                        } else {
                            comet = true;
                            res.action(ActionCode.ACTION_COMET_BEGIN, null);
                        }
                    } else {
                        // Clear the filter chain, as otherwise it will not be reset elsewhere
                        // since this is a Comet request
                        request.setFilterChain(null);
                    }
                }

            }

            if (!comet) {
                response.finishResponse();
                req.action(ActionCode.ACTION_POST_REQUEST , null);
            }

        } catch (IOException e) {
            ;
        } catch (Throwable t) {
            log.error(sm.getString("coyoteAdapter.service"), t);
        } finally {
            req.getRequestProcessor().setWorkerThreadName(null);
            // Recycle the wrapper request and response
            if (!comet) {
                request.recycle();
                response.recycle();
            } else {
                // Clear converters so that the minimum amount of memory 
                // is used by this processor
                request.clearEncoders();
                response.clearEncoders();
            }
        }