http11processor.java

业界著名的tomcat服务器的最新6.0的源代码。

    /**
     * Set compressable mime-type list
     * List contains users agents separated by ',' :
     *
     * ie: "text/html,text/xml,text/plain"
     */
    public void setCompressableMimeTypes(String compressableMimeTypes) {
        if (compressableMimeTypes != null) {
            StringTokenizer st = new StringTokenizer(compressableMimeTypes, ",");

            while (st.hasMoreTokens()) {
                addCompressableMimeType(st.nextToken().trim());
            }
        }
    }


    /**
     * Return the list of restricted user agents.
     */
    public String[] findCompressableMimeTypes() {
        return (compressableMimeTypes);
    }



    // --------------------------------------------------------- Public Methods


    /**
     * Add input or output filter.
     *
     * @param className class name of the filter
     */
    protected void addFilter(String className) {
        try {
            Class clazz = Class.forName(className);
            Object obj = clazz.newInstance();
            if (obj instanceof InputFilter) {
                inputBuffer.addFilter((InputFilter) obj);
            } else if (obj instanceof OutputFilter) {
                outputBuffer.addFilter((OutputFilter) obj);
            } else {
                log.warn(sm.getString("http11processor.filter.unknown", className));
            }
        } catch (Exception e) {
            log.error(sm.getString("http11processor.filter.error", className), e);
        }
    }


    /**
     * General use method
     *
     * @param sArray the StringArray
     * @param value string
     */
    private String[] addStringArray(String sArray[], String value) {
        String[] result = null;
        if (sArray == null) {
            result = new String[1];
            result[0] = value;
        }
        else {
            result = new String[sArray.length + 1];
            for (int i = 0; i < sArray.length; i++)
                result[i] = sArray[i];
            result[sArray.length] = value;
        }
        return result;
    }


    /**
     * General use method
     *
     * @param rArray the REArray
     * @param value Obj
     */
    private Pattern[] addREArray(Pattern rArray[], Pattern value) {
        Pattern[] result = null;
        if (rArray == null) {
            result = new Pattern[1];
            result[0] = value;
        }
        else {
            result = new Pattern[rArray.length + 1];
            for (int i = 0; i < rArray.length; i++)
                result[i] = rArray[i];
            result[rArray.length] = value;
        }
        return result;
    }


    /**
     * General use method
     *
     * @param sArray the StringArray
     * @param value string
     */
    private boolean inStringArray(String sArray[], String value) {
        for (int i = 0; i < sArray.length; i++) {
            if (sArray[i].equals(value)) {
                return true;
            }
        }
        return false;
    }


    /**
     * Checks if any entry in the string array starts with the specified value
     *
     * @param sArray the StringArray
     * @param value string
     */
    private boolean startsWithStringArray(String sArray[], String value) {
        if (value == null)
           return false;
        for (int i = 0; i < sArray.length; i++) {
            if (value.startsWith(sArray[i])) {
                return true;
            }
        }
        return false;
    }


    /**
     * Add restricted user-agent (which will downgrade the connector
     * to HTTP/1.0 mode). The user agent String given will be matched
     * via regexp to the user-agent header submitted by the client.
     *
     * @param userAgent user-agent string
     */
    public void addRestrictedUserAgent(String userAgent) {
        try {
            Pattern nRule = Pattern.compile(userAgent);
            restrictedUserAgents = addREArray(restrictedUserAgents, nRule);
        } catch (PatternSyntaxException pse) {
            log.error(sm.getString("http11processor.regexp.error", userAgent), pse);
        }
    }


    /**
     * Set restricted user agent list (this method is best when used with
     * a large number of connectors, where it would be better to have all of
     * them referenced a single array).
     */
    public void setRestrictedUserAgents(Pattern[] restrictedUserAgents) {
        this.restrictedUserAgents = restrictedUserAgents;
    }


    /**
     * Set restricted user agent list (which will downgrade the connector
     * to HTTP/1.0 mode). List contains users agents separated by ',' :
     *
     * ie: "gorilla,desesplorer,tigrus"
     */
    public void setRestrictedUserAgents(String restrictedUserAgents) {
        if (restrictedUserAgents != null) {
            StringTokenizer st =
                new StringTokenizer(restrictedUserAgents, ",");
            while (st.hasMoreTokens()) {
                addRestrictedUserAgent(st.nextToken().trim());
            }
        }
    }


    /**
     * Return the list of restricted user agents.
     */
    public String[] findRestrictedUserAgents() {
        String[] sarr = new String [restrictedUserAgents.length];

        for (int i = 0; i < restrictedUserAgents.length; i++)
            sarr[i] = restrictedUserAgents[i].toString();

        return (sarr);
    }


    /**
     * Set the maximum number of Keep-Alive requests to honor.
     * This is to safeguard from DoS attacks.  Setting to a negative
     * value disables the check.
     */
    public void setMaxKeepAliveRequests(int mkar) {
        maxKeepAliveRequests = mkar;
    }


    /**
     * Return the number of Keep-Alive requests that we will honor.
     */
    public int getMaxKeepAliveRequests() {
        return maxKeepAliveRequests;
    }

    /**
     * Set the Keep-Alive timeout.
     */
    public void setKeepAliveTimeout(int timeout) {
        keepAliveTimeout = timeout;
    }


    /**
     * Return the number Keep-Alive timeout.
     */
    public int getKeepAliveTimeout() {
        return keepAliveTimeout;
    }


    /**
     * Set the maximum size of a POST which will be buffered in SSL mode.
     */
    public void setMaxSavePostSize(int msps) {
        maxSavePostSize = msps;
    }


    /**
     * Return the maximum size of a POST which will be buffered in SSL mode.
     */
    public int getMaxSavePostSize() {
        return maxSavePostSize;
    }


    /**
     * Set the SSL information for this HTTP connection.
     */
    public void setSSLSupport(SSLSupport sslSupport) {
        this.sslSupport = sslSupport;
    }


    /**
     * Set the flag to control upload time-outs.
     */
    public void setDisableUploadTimeout(boolean isDisabled) {
        disableUploadTimeout = isDisabled;
    }

    /**
     * Get the flag that controls upload time-outs.
     */
    public boolean getDisableUploadTimeout() {
        return disableUploadTimeout;
    }

    /**
     * Set the socket buffer flag.
     */
    public void setSocketBuffer(int socketBuffer) {
        this.socketBuffer = socketBuffer;
        outputBuffer.setSocketBuffer(socketBuffer);
    }

    /**
     * Get the socket buffer flag.
     */
    public int getSocketBuffer() {
        return socketBuffer;
    }

    /**
     * Set the upload timeout.
     */
    public void setTimeout( int timeouts ) {
        timeout = timeouts ;
    }

    /**
     * Get the upload timeout.
     */
    public int getTimeout() {
        return timeout;
    }


    /**
     * Set the server header name.
     */
    public void setServer( String server ) {
        if (server==null || server.equals("")) {
            this.server = null;
        } else {
            this.server = server;
        }
    }

    /**
     * Get the server header name.
     */
    public String getServer() {
        return server;
    }


    /** Get the request associated with this processor.
     *
     * @return The request
     */
    public Request getRequest() {
        return request;
    }

    /**
     * Process pipelined HTTP requests using the specified input and output
     * streams.
     *
     * @param input stream from which the HTTP requests will be read
     * @param output stream which will be used to output the HTTP
     * responses
     * @throws IOException error during an I/O operation
     */
    public void process(Socket socket)
        throws IOException {
        RequestInfo rp = request.getRequestProcessor();
        rp.setStage(org.apache.coyote.Constants.STAGE_PARSE);

        // Set the remote address
        remoteAddr = null;
        remoteHost = null;
        localAddr = null;
        localName = null;
        remotePort = -1;
        localPort = -1;

        // Setting up the I/O
        this.socket = socket;
        inputBuffer.setInputStream(socket.getInputStream());
        outputBuffer.setOutputStream(socket.getOutputStream());

        // Error flag
        error = false;
        keepAlive = true;

        int keepAliveLeft = maxKeepAliveRequests;
        int soTimeout = socket.getSoTimeout();
        int oldSoTimeout = soTimeout;

        int threadRatio = (endpoint.getCurrentThreadsBusy() * 100)
                / endpoint.getMaxThreads();
        if (threadRatio > 75) {
            keepAliveLeft = 1;
        }
        
        if (soTimeout != oldSoTimeout) {
            try {
                socket.setSoTimeout(soTimeout);
            } catch (Throwable t) {
                log.debug(sm.getString("http11processor.socket.timeout"), t);
                error = true;
            }
        }

        boolean keptAlive = false;

        while (started && !error && keepAlive) {

            // Parsing the request header
            try {
                if (!disableUploadTimeout && keptAlive) {
                    if (keepAliveTimeout > 0) {
                        socket.setSoTimeout(keepAliveTimeout);
                    }
                    else if (soTimeout > 0) {
                        socket.setSoTimeout(soTimeout);
                    }
                }
                inputBuffer.parseRequestLine();
                request.setStartTime(System.currentTimeMillis());
                keptAlive = true;
                if (!disableUploadTimeout) {
                    socket.setSoTimeout(timeout);
                }
                inputBuffer.parseHeaders();
            } catch (IOException e) {
                error = true;
                break;
            } catch (Throwable t) {
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("http11processor.header.parse"), t);
                }
                // 400 - Bad Request
                response.setStatus(400);
                error = true;
            }

            // Setting up filters, and parse some request headers
            rp.setStage(org.apache.coyote.Constants.STAGE_PREPARE);
            try {
                prepareRequest();
            } catch (Throwable t) {
                if (log.isDebugEnabled()) {
                    log.debug(sm.getString("http11processor.request.prepare"), t);
                }
                // 400 - Internal Server Error
                response.setStatus(400);
                error = true;
            }

            if (maxKeepAliveRequests > 0 && --keepAliveLeft == 0)
                keepAlive = false;

            // Process the request in the adapter
            if (!error) {
                try {
                    rp.setStage(org.apache.coyote.Constants.STAGE_SERVICE);
                    adapter.service(request, response);
                    // Handle when the response was committed before a serious
                    // error occurred.  Throwing a ServletException should both
                    // set the status to 500 and set the errorException.
                    // If we fail here, then the response is likely already