| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package org.apache.catalina.servlets; |
| |
| |
| import java.io.BufferedInputStream; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.io.RandomAccessFile; |
| import java.io.Reader; |
| import java.io.StringReader; |
| import java.io.StringWriter; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.StringTokenizer; |
| |
| import javax.naming.InitialContext; |
| import javax.naming.NameClassPair; |
| import javax.naming.NamingEnumeration; |
| import javax.naming.NamingException; |
| import javax.naming.directory.DirContext; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletOutputStream; |
| import javax.servlet.UnavailableException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.xml.transform.Source; |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.stream.StreamResult; |
| import javax.xml.transform.stream.StreamSource; |
| |
| import org.apache.catalina.Globals; |
| import org.apache.catalina.util.RequestUtil; |
| import org.apache.catalina.util.ServerInfo; |
| import org.apache.catalina.util.StringManager; |
| import org.apache.catalina.util.URLEncoder; |
| import org.apache.naming.resources.CacheEntry; |
| import org.apache.naming.resources.ProxyDirContext; |
| import org.apache.naming.resources.Resource; |
| import org.apache.naming.resources.ResourceAttributes; |
| |
| |
| /** |
| * The default resource-serving servlet for most web applications, |
| * used to serve static resources such as HTML pages and images. |
| * |
| * @author Craig R. McClanahan |
| * @author Remy Maucherat |
| * @version $Revision$ $Date$ |
| */ |
| |
| public class DefaultServlet |
| extends HttpServlet { |
| |
| |
| // ----------------------------------------------------- Instance Variables |
| |
| |
| /** |
| * The debugging detail level for this servlet. |
| */ |
| protected int debug = 0; |
| |
| |
| /** |
| * The input buffer size to use when serving resources. |
| */ |
| protected int input = 2048; |
| |
| |
| /** |
| * Should we generate directory listings? |
| */ |
| protected boolean listings = false; |
| |
| |
| /** |
| * Read only flag. By default, it's set to true. |
| */ |
| protected boolean readOnly = true; |
| |
| |
| /** |
| * The output buffer size to use when serving resources. |
| */ |
| protected int output = 2048; |
| |
| |
| /** |
| * Array containing the safe characters set. |
| */ |
| protected static URLEncoder urlEncoder; |
| |
| |
| /** |
| * Allow customized directory listing per directory. |
| */ |
| protected String localXsltFile = null; |
| |
| |
| /** |
| * Allow customized directory listing per instance. |
| */ |
| protected String globalXsltFile = null; |
| |
| |
| /** |
| * Allow a readme file to be included. |
| */ |
| protected String readmeFile = null; |
| |
| |
| /** |
| * Proxy directory context. |
| */ |
| protected ProxyDirContext resources = null; |
| |
| |
| /** |
| * File encoding to be used when reading static files. If none is specified |
| * the platform default is used. |
| */ |
| protected String fileEncoding = null; |
| |
| |
| /** |
| * Minimum size for sendfile usage in bytes. |
| */ |
| protected int sendfileSize = 48 * 1024; |
| |
| |
| /** |
| * Full range marker. |
| */ |
| protected static ArrayList FULL = new ArrayList(); |
| |
| |
| // ----------------------------------------------------- Static Initializer |
| |
| |
| /** |
| * GMT timezone - all HTTP dates are on GMT |
| */ |
| static { |
| urlEncoder = new URLEncoder(); |
| urlEncoder.addSafeCharacter('-'); |
| urlEncoder.addSafeCharacter('_'); |
| urlEncoder.addSafeCharacter('.'); |
| urlEncoder.addSafeCharacter('*'); |
| urlEncoder.addSafeCharacter('/'); |
| } |
| |
| |
| /** |
| * MIME multipart separation string |
| */ |
| protected static final String mimeSeparation = "CATALINA_MIME_BOUNDARY"; |
| |
| |
| /** |
| * JNDI resources name. |
| */ |
| protected static final String RESOURCES_JNDI_NAME = "java:/comp/Resources"; |
| |
| |
| /** |
| * The string manager for this package. |
| */ |
| protected static StringManager sm = |
| StringManager.getManager(Constants.Package); |
| |
| |
| /** |
| * Size of file transfer buffer in bytes. |
| */ |
| protected static final int BUFFER_SIZE = 4096; |
| |
| |
| // --------------------------------------------------------- Public Methods |
| |
| |
| /** |
| * Finalize this servlet. |
| */ |
| public void destroy() { |
| } |
| |
| |
| /** |
| * Initialize this servlet. |
| */ |
| public void init() throws ServletException { |
| |
| // Set our properties from the initialization parameters |
| String value = null; |
| try { |
| value = getServletConfig().getInitParameter("debug"); |
| if (value != null) { |
| debug = Integer.parseInt(value); |
| } |
| } catch (Exception e) { |
| log("DefaultServlet.init: couldn't read debug from " + value); |
| } |
| |
| try { |
| value = getServletConfig().getInitParameter("input"); |
| if (value != null) { |
| input = Integer.parseInt(value); |
| } |
| } catch (Exception e) { |
| log("DefaultServlet.init: couldn't read input from " + value); |
| } |
| |
| try { |
| value = getServletConfig().getInitParameter("listings"); |
| if (value != null) { |
| listings = (new Boolean(value)).booleanValue(); |
| } |
| } catch (Exception e) { |
| log("DefaultServlet.init: couldn't read listings from " + value); |
| } |
| |
| try { |
| value = getServletConfig().getInitParameter("readonly"); |
| if (value != null) { |
| readOnly = (new Boolean(value)).booleanValue(); |
| } |
| } catch (Exception e) { |
| log("DefaultServlet.init: couldn't read readonly from " + value); |
| } |
| |
| try { |
| value = getServletConfig().getInitParameter("output"); |
| if (value != null) { |
| output = Integer.parseInt(value); |
| } |
| } catch (Exception e) { |
| log("DefaultServlet.init: couldn't read output from " + value); |
| } |
| |
| try { |
| value = getServletConfig().getInitParameter("sendfileSize"); |
| if (value != null) { |
| sendfileSize = Integer.parseInt(value) * 1024; |
| } |
| } catch (Exception e) { |
| log("DefaultServlet.init: couldn't read sendfileSize from " + value); |
| } |
| |
| try { |
| value = getServletConfig().getInitParameter("fileEncoding"); |
| if (value != null) { |
| fileEncoding = value; |
| } |
| } catch (Exception e) { |
| log("DefaultServlet.init: couldn't read fileEncoding from " + value); |
| } |
| |
| globalXsltFile = getServletConfig().getInitParameter("globalXsltFile"); |
| localXsltFile = getServletConfig().getInitParameter("localXsltFile"); |
| readmeFile = getServletConfig().getInitParameter("readmeFile"); |
| |
| // Sanity check on the specified buffer sizes |
| if (input < 256) |
| input = 256; |
| if (output < 256) |
| output = 256; |
| |
| if (debug > 0) { |
| log("DefaultServlet.init: input buffer size=" + input + |
| ", output buffer size=" + output); |
| } |
| |
| // Load the proxy dir context. |
| try { |
| resources = (ProxyDirContext) getServletContext() |
| .getAttribute(Globals.RESOURCES_ATTR); |
| } catch(ClassCastException e) { |
| // Failed : Not the right type |
| } |
| |
| if (resources == null) { |
| try { |
| resources = |
| (ProxyDirContext) new InitialContext() |
| .lookup(RESOURCES_JNDI_NAME); |
| } catch (NamingException e) { |
| // Failed |
| } catch (ClassCastException e) { |
| // Failed : Not the right type |
| } |
| } |
| |
| if (resources == null) { |
| throw new UnavailableException("No resources"); |
| } |
| |
| } |
| |
| |
| // ------------------------------------------------------ Protected Methods |
| |
| |
| /** |
| * Return the relative path associated with this servlet. |
| * |
| * @param request The servlet request we are processing |
| */ |
| protected String getRelativePath(HttpServletRequest request) { |
| |
| // Are we being processed by a RequestDispatcher.include()? |
| if (request.getAttribute(Globals.INCLUDE_REQUEST_URI_ATTR) != null) { |
| String result = (String) request.getAttribute( |
| Globals.INCLUDE_PATH_INFO_ATTR); |
| if (result == null) |
| result = (String) request.getAttribute( |
| Globals.INCLUDE_SERVLET_PATH_ATTR); |
| if ((result == null) || (result.equals(""))) |
| result = "/"; |
| return (result); |
| } |
| |
| // No, extract the desired path directly from the request |
| String result = request.getPathInfo(); |
| if (result == null) { |
| result = request.getServletPath(); |
| } |
| if ((result == null) || (result.equals(""))) { |
| result = "/"; |
| } |
| return (result); |
| |
| } |
| |
| |
| /** |
| * Process a GET request for the specified resource. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * |
| * @exception IOException if an input/output error occurs |
| * @exception ServletException if a servlet-specified error occurs |
| */ |
| protected void doGet(HttpServletRequest request, |
| HttpServletResponse response) |
| throws IOException, ServletException { |
| |
| // Serve the requested resource, including the data content |
| try { |
| serveResource(request, response, true); |
| } catch( IOException ex ) { |
| // we probably have this check somewhere else too. |
| if( ex.getMessage() != null |
| && ex.getMessage().indexOf("Broken pipe") >= 0 ) { |
| // ignore it. |
| } |
| throw ex; |
| } |
| |
| } |
| |
| |
| /** |
| * Process a HEAD request for the specified resource. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * |
| * @exception IOException if an input/output error occurs |
| * @exception ServletException if a servlet-specified error occurs |
| */ |
| protected void doHead(HttpServletRequest request, |
| HttpServletResponse response) |
| throws IOException, ServletException { |
| |
| // Serve the requested resource, without the data content |
| serveResource(request, response, false); |
| |
| } |
| |
| |
| /** |
| * Process a POST request for the specified resource. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * |
| * @exception IOException if an input/output error occurs |
| * @exception ServletException if a servlet-specified error occurs |
| */ |
| protected void doPost(HttpServletRequest request, |
| HttpServletResponse response) |
| throws IOException, ServletException { |
| doGet(request, response); |
| } |
| |
| |
| /** |
| * Process a POST request for the specified resource. |
| * |
| * @param req The servlet request we are processing |
| * @param resp The servlet response we are creating |
| * |
| * @exception IOException if an input/output error occurs |
| * @exception ServletException if a servlet-specified error occurs |
| */ |
| protected void doPut(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| |
| if (readOnly) { |
| resp.sendError(HttpServletResponse.SC_FORBIDDEN); |
| return; |
| } |
| |
| String path = getRelativePath(req); |
| |
| boolean exists = true; |
| try { |
| resources.lookup(path); |
| } catch (NamingException e) { |
| exists = false; |
| } |
| |
| boolean result = true; |
| |
| // Temp. content file used to support partial PUT |
| File contentFile = null; |
| |
| Range range = parseContentRange(req, resp); |
| |
| InputStream resourceInputStream = null; |
| |
| // Append data specified in ranges to existing content for this |
| // resource - create a temp. file on the local filesystem to |
| // perform this operation |
| // Assume just one range is specified for now |
| if (range != null) { |
| contentFile = executePartialPut(req, range, path); |
| resourceInputStream = new FileInputStream(contentFile); |
| } else { |
| resourceInputStream = req.getInputStream(); |
| } |
| |
| try { |
| Resource newResource = new Resource(resourceInputStream); |
| // FIXME: Add attributes |
| if (exists) { |
| resources.rebind(path, newResource); |
| } else { |
| resources.bind(path, newResource); |
| } |
| } catch(NamingException e) { |
| result = false; |
| } |
| |
| // Bugzilla 40326: at this point content file should be safe to delete |
| // as it's no longer referenced. Let's not rely on deleteOnExit because |
| // it's a memory leak, as noted in this Bugzilla issue. |
| try { |
| contentFile.delete(); |
| } catch (Exception e) { |
| log("DefaultServlet.doPut: couldn't delete temporary file: " + e.getMessage()); |
| } |
| |
| if (result) { |
| if (exists) { |
| resp.setStatus(HttpServletResponse.SC_NO_CONTENT); |
| } else { |
| resp.setStatus(HttpServletResponse.SC_CREATED); |
| } |
| } else { |
| resp.sendError(HttpServletResponse.SC_CONFLICT); |
| } |
| |
| } |
| |
| |
| /** |
| * Handle a partial PUT. New content specified in request is appended to |
| * existing content in oldRevisionContent (if present). This code does |
| * not support simultaneous partial updates to the same resource. |
| */ |
| protected File executePartialPut(HttpServletRequest req, Range range, |
| String path) |
| throws IOException { |
| |
| // Append data specified in ranges to existing content for this |
| // resource - create a temp. file on the local filesystem to |
| // perform this operation |
| File tempDir = (File) getServletContext().getAttribute |
| ("javax.servlet.context.tempdir"); |
| // Convert all '/' characters to '.' in resourcePath |
| String convertedResourcePath = path.replace('/', '.'); |
| File contentFile = new File(tempDir, convertedResourcePath); |
| contentFile.createNewFile(); |
| |
| RandomAccessFile randAccessContentFile = |
| new RandomAccessFile(contentFile, "rw"); |
| |
| Resource oldResource = null; |
| try { |
| Object obj = resources.lookup(path); |
| if (obj instanceof Resource) |
| oldResource = (Resource) obj; |
| } catch (NamingException e) { |
| log("DefaultServlet.executePartialPut: couldn't find resource at " + path); |
| } |
| |
| // Copy data in oldRevisionContent to contentFile |
| if (oldResource != null) { |
| BufferedInputStream bufOldRevStream = |
| new BufferedInputStream(oldResource.streamContent(), |
| BUFFER_SIZE); |
| |
| int numBytesRead; |
| byte[] copyBuffer = new byte[BUFFER_SIZE]; |
| while ((numBytesRead = bufOldRevStream.read(copyBuffer)) != -1) { |
| randAccessContentFile.write(copyBuffer, 0, numBytesRead); |
| } |
| |
| bufOldRevStream.close(); |
| } |
| |
| randAccessContentFile.setLength(range.length); |
| |
| // Append data in request input stream to contentFile |
| randAccessContentFile.seek(range.start); |
| int numBytesRead; |
| byte[] transferBuffer = new byte[BUFFER_SIZE]; |
| BufferedInputStream requestBufInStream = |
| new BufferedInputStream(req.getInputStream(), BUFFER_SIZE); |
| while ((numBytesRead = requestBufInStream.read(transferBuffer)) != -1) { |
| randAccessContentFile.write(transferBuffer, 0, numBytesRead); |
| } |
| randAccessContentFile.close(); |
| requestBufInStream.close(); |
| |
| return contentFile; |
| |
| } |
| |
| |
| /** |
| * Process a POST request for the specified resource. |
| * |
| * @param req The servlet request we are processing |
| * @param resp The servlet response we are creating |
| * |
| * @exception IOException if an input/output error occurs |
| * @exception ServletException if a servlet-specified error occurs |
| */ |
| protected void doDelete(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| |
| if (readOnly) { |
| resp.sendError(HttpServletResponse.SC_FORBIDDEN); |
| return; |
| } |
| |
| String path = getRelativePath(req); |
| |
| boolean exists = true; |
| try { |
| resources.lookup(path); |
| } catch (NamingException e) { |
| exists = false; |
| } |
| |
| if (exists) { |
| boolean result = true; |
| try { |
| resources.unbind(path); |
| } catch (NamingException e) { |
| result = false; |
| } |
| if (result) { |
| resp.setStatus(HttpServletResponse.SC_NO_CONTENT); |
| } else { |
| resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED); |
| } |
| } else { |
| resp.sendError(HttpServletResponse.SC_NOT_FOUND); |
| } |
| |
| } |
| |
| |
| /** |
| * Check if the conditions specified in the optional If headers are |
| * satisfied. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * @param resourceAttributes The resource information |
| * @return boolean true if the resource meets all the specified conditions, |
| * and false if any of the conditions is not satisfied, in which case |
| * request processing is stopped |
| */ |
| protected boolean checkIfHeaders(HttpServletRequest request, |
| HttpServletResponse response, |
| ResourceAttributes resourceAttributes) |
| throws IOException { |
| |
| return checkIfMatch(request, response, resourceAttributes) |
| && checkIfModifiedSince(request, response, resourceAttributes) |
| && checkIfNoneMatch(request, response, resourceAttributes) |
| && checkIfUnmodifiedSince(request, response, resourceAttributes); |
| |
| } |
| |
| |
| /** |
| * Get the ETag associated with a file. |
| * |
| * @param resourceAttributes The resource information |
| */ |
| protected String getETag(ResourceAttributes resourceAttributes) { |
| String result = null; |
| if ((result = resourceAttributes.getETag(true)) != null) { |
| return result; |
| } else if ((result = resourceAttributes.getETag()) != null) { |
| return result; |
| } else { |
| return "W/\"" + resourceAttributes.getContentLength() + "-" |
| + resourceAttributes.getLastModified() + "\""; |
| } |
| } |
| |
| |
| /** |
| * URL rewriter. |
| * |
| * @param path Path which has to be rewiten |
| */ |
| protected String rewriteUrl(String path) { |
| return urlEncoder.encode( path ); |
| } |
| |
| |
| /** |
| * Display the size of a file. |
| */ |
| protected void displaySize(StringBuffer buf, int filesize) { |
| |
| int leftside = filesize / 1024; |
| int rightside = (filesize % 1024) / 103; // makes 1 digit |
| // To avoid 0.0 for non-zero file, we bump to 0.1 |
| if (leftside == 0 && rightside == 0 && filesize != 0) |
| rightside = 1; |
| buf.append(leftside).append(".").append(rightside); |
| buf.append(" KB"); |
| |
| } |
| |
| |
| /** |
| * Serve the specified resource, optionally including the data content. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * @param content Should the content be included? |
| * |
| * @exception IOException if an input/output error occurs |
| * @exception ServletException if a servlet-specified error occurs |
| */ |
| protected void serveResource(HttpServletRequest request, |
| HttpServletResponse response, |
| boolean content) |
| throws IOException, ServletException { |
| |
| // Identify the requested resource path |
| String path = getRelativePath(request); |
| if (debug > 0) { |
| if (content) |
| log("DefaultServlet.serveResource: Serving resource '" + |
| path + "' headers and data"); |
| else |
| log("DefaultServlet.serveResource: Serving resource '" + |
| path + "' headers only"); |
| } |
| |
| CacheEntry cacheEntry = resources.lookupCache(path); |
| |
| if (!cacheEntry.exists) { |
| // Check if we're included so we can return the appropriate |
| // missing resource name in the error |
| String requestUri = (String) request.getAttribute( |
| Globals.INCLUDE_REQUEST_URI_ATTR); |
| if (requestUri == null) { |
| requestUri = request.getRequestURI(); |
| } else { |
| // We're included, and the response.sendError() below is going |
| // to be ignored by the resource that is including us. |
| // Therefore, the only way we can let the including resource |
| // know is by including warning message in response |
| response.getWriter().write( |
| sm.getString("defaultServlet.missingResource", |
| requestUri)); |
| } |
| |
| response.sendError(HttpServletResponse.SC_NOT_FOUND, |
| requestUri); |
| return; |
| } |
| |
| // If the resource is not a collection, and the resource path |
| // ends with "/" or "\", return NOT FOUND |
| if (cacheEntry.context == null) { |
| if (path.endsWith("/") || (path.endsWith("\\"))) { |
| // Check if we're included so we can return the appropriate |
| // missing resource name in the error |
| String requestUri = (String) request.getAttribute( |
| Globals.INCLUDE_REQUEST_URI_ATTR); |
| if (requestUri == null) { |
| requestUri = request.getRequestURI(); |
| } |
| response.sendError(HttpServletResponse.SC_NOT_FOUND, |
| requestUri); |
| return; |
| } |
| } |
| |
| // Check if the conditions specified in the optional If headers are |
| // satisfied. |
| if (cacheEntry.context == null) { |
| |
| // Checking If headers |
| boolean included = |
| (request.getAttribute(Globals.INCLUDE_CONTEXT_PATH_ATTR) != null); |
| if (!included |
| && !checkIfHeaders(request, response, cacheEntry.attributes)) { |
| return; |
| } |
| |
| } |
| |
| // Find content type. |
| String contentType = cacheEntry.attributes.getMimeType(); |
| if (contentType == null) { |
| contentType = getServletContext().getMimeType(cacheEntry.name); |
| cacheEntry.attributes.setMimeType(contentType); |
| } |
| |
| ArrayList ranges = null; |
| long contentLength = -1L; |
| |
| if (cacheEntry.context != null) { |
| |
| // Skip directory listings if we have been configured to |
| // suppress them |
| if (!listings) { |
| response.sendError(HttpServletResponse.SC_NOT_FOUND, |
| request.getRequestURI()); |
| return; |
| } |
| contentType = "text/html;charset=UTF-8"; |
| |
| } else { |
| |
| // Parse range specifier |
| |
| ranges = parseRange(request, response, cacheEntry.attributes); |
| |
| // ETag header |
| response.setHeader("ETag", getETag(cacheEntry.attributes)); |
| |
| // Last-Modified header |
| response.setHeader("Last-Modified", |
| cacheEntry.attributes.getLastModifiedHttp()); |
| |
| // Get content length |
| contentLength = cacheEntry.attributes.getContentLength(); |
| // Special case for zero length files, which would cause a |
| // (silent) ISE when setting the output buffer size |
| if (contentLength == 0L) { |
| content = false; |
| } |
| |
| } |
| |
| ServletOutputStream ostream = null; |
| PrintWriter writer = null; |
| |
| if (content) { |
| |
| // Trying to retrieve the servlet output stream |
| |
| try { |
| ostream = response.getOutputStream(); |
| } catch (IllegalStateException e) { |
| // If it fails, we try to get a Writer instead if we're |
| // trying to serve a text file |
| if ( (contentType == null) |
| || (contentType.startsWith("text")) |
| || (contentType.endsWith("xml")) ) { |
| writer = response.getWriter(); |
| } else { |
| throw e; |
| } |
| } |
| |
| } |
| |
| if ( (cacheEntry.context != null) |
| || ( ((ranges == null) || (ranges.isEmpty())) |
| && (request.getHeader("Range") == null) ) |
| || (ranges == FULL) ) { |
| |
| // Set the appropriate output headers |
| if (contentType != null) { |
| if (debug > 0) |
| log("DefaultServlet.serveFile: contentType='" + |
| contentType + "'"); |
| response.setContentType(contentType); |
| } |
| if ((cacheEntry.resource != null) && (contentLength >= 0)) { |
| if (debug > 0) |
| log("DefaultServlet.serveFile: contentLength=" + |
| contentLength); |
| if (contentLength < Integer.MAX_VALUE) { |
| response.setContentLength((int) contentLength); |
| } else { |
| // Set the content-length as String to be able to use a long |
| response.setHeader("content-length", "" + contentLength); |
| } |
| } |
| |
| InputStream renderResult = null; |
| if (cacheEntry.context != null) { |
| |
| if (content) { |
| // Serve the directory browser |
| renderResult = |
| render(request.getContextPath(), cacheEntry); |
| } |
| |
| } |
| |
| // Copy the input stream to our output stream (if requested) |
| if (content) { |
| try { |
| response.setBufferSize(output); |
| } catch (IllegalStateException e) { |
| // Silent catch |
| } |
| if (ostream != null) { |
| if (!checkSendfile(request, response, cacheEntry, contentLength, null)) |
| copy(cacheEntry, renderResult, ostream); |
| } else { |
| copy(cacheEntry, renderResult, writer); |
| } |
| } |
| |
| } else { |
| |
| if ((ranges == null) || (ranges.isEmpty())) |
| return; |
| |
| // Partial content response. |
| |
| response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); |
| |
| if (ranges.size() == 1) { |
| |
| Range range = (Range) ranges.get(0); |
| response.addHeader("Content-Range", "bytes " |
| + range.start |
| + "-" + range.end + "/" |
| + range.length); |
| long length = range.end - range.start + 1; |
| if (length < Integer.MAX_VALUE) { |
| response.setContentLength((int) length); |
| } else { |
| // Set the content-length as String to be able to use a long |
| response.setHeader("content-length", "" + length); |
| } |
| |
| if (contentType != null) { |
| if (debug > 0) |
| log("DefaultServlet.serveFile: contentType='" + |
| contentType + "'"); |
| response.setContentType(contentType); |
| } |
| |
| if (content) { |
| try { |
| response.setBufferSize(output); |
| } catch (IllegalStateException e) { |
| // Silent catch |
| } |
| if (ostream != null) { |
| if (!checkSendfile(request, response, cacheEntry, range.end - range.start + 1, range)) |
| copy(cacheEntry, ostream, range); |
| } else { |
| copy(cacheEntry, writer, range); |
| } |
| } |
| |
| } else { |
| |
| response.setContentType("multipart/byteranges; boundary=" |
| + mimeSeparation); |
| |
| if (content) { |
| try { |
| response.setBufferSize(output); |
| } catch (IllegalStateException e) { |
| // Silent catch |
| } |
| if (ostream != null) { |
| copy(cacheEntry, ostream, ranges.iterator(), |
| contentType); |
| } else { |
| copy(cacheEntry, writer, ranges.iterator(), |
| contentType); |
| } |
| } |
| |
| } |
| |
| } |
| |
| } |
| |
| |
| /** |
| * Parse the content-range header. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * @return Range |
| */ |
| protected Range parseContentRange(HttpServletRequest request, |
| HttpServletResponse response) |
| throws IOException { |
| |
| // Retrieving the content-range header (if any is specified |
| String rangeHeader = request.getHeader("Content-Range"); |
| |
| if (rangeHeader == null) |
| return null; |
| |
| // bytes is the only range unit supported |
| if (!rangeHeader.startsWith("bytes")) { |
| response.sendError(HttpServletResponse.SC_BAD_REQUEST); |
| return null; |
| } |
| |
| rangeHeader = rangeHeader.substring(6).trim(); |
| |
| int dashPos = rangeHeader.indexOf('-'); |
| int slashPos = rangeHeader.indexOf('/'); |
| |
| if (dashPos == -1) { |
| response.sendError(HttpServletResponse.SC_BAD_REQUEST); |
| return null; |
| } |
| |
| if (slashPos == -1) { |
| response.sendError(HttpServletResponse.SC_BAD_REQUEST); |
| return null; |
| } |
| |
| Range range = new Range(); |
| |
| try { |
| range.start = Long.parseLong(rangeHeader.substring(0, dashPos)); |
| range.end = |
| Long.parseLong(rangeHeader.substring(dashPos + 1, slashPos)); |
| range.length = Long.parseLong |
| (rangeHeader.substring(slashPos + 1, rangeHeader.length())); |
| } catch (NumberFormatException e) { |
| response.sendError(HttpServletResponse.SC_BAD_REQUEST); |
| return null; |
| } |
| |
| if (!range.validate()) { |
| response.sendError(HttpServletResponse.SC_BAD_REQUEST); |
| return null; |
| } |
| |
| return range; |
| |
| } |
| |
| |
| /** |
| * Parse the range header. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * @return Vector of ranges |
| */ |
| protected ArrayList parseRange(HttpServletRequest request, |
| HttpServletResponse response, |
| ResourceAttributes resourceAttributes) |
| throws IOException { |
| |
| // Checking If-Range |
| String headerValue = request.getHeader("If-Range"); |
| |
| if (headerValue != null) { |
| |
| long headerValueTime = (-1L); |
| try { |
| headerValueTime = request.getDateHeader("If-Range"); |
| } catch (Exception e) { |
| ; |
| } |
| |
| String eTag = getETag(resourceAttributes); |
| long lastModified = resourceAttributes.getLastModified(); |
| |
| if (headerValueTime == (-1L)) { |
| |
| // If the ETag the client gave does not match the entity |
| // etag, then the entire entity is returned. |
| if (!eTag.equals(headerValue.trim())) |
| return FULL; |
| |
| } else { |
| |
| // If the timestamp of the entity the client got is older than |
| // the last modification date of the entity, the entire entity |
| // is returned. |
| if (lastModified > (headerValueTime + 1000)) |
| return FULL; |
| |
| } |
| |
| } |
| |
| long fileLength = resourceAttributes.getContentLength(); |
| |
| if (fileLength == 0) |
| return null; |
| |
| // Retrieving the range header (if any is specified |
| String rangeHeader = request.getHeader("Range"); |
| |
| if (rangeHeader == null) |
| return null; |
| // bytes is the only range unit supported (and I don't see the point |
| // of adding new ones). |
| if (!rangeHeader.startsWith("bytes")) { |
| response.addHeader("Content-Range", "bytes */" + fileLength); |
| response.sendError |
| (HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); |
| return null; |
| } |
| |
| rangeHeader = rangeHeader.substring(6); |
| |
| // Vector which will contain all the ranges which are successfully |
| // parsed. |
| ArrayList result = new ArrayList(); |
| StringTokenizer commaTokenizer = new StringTokenizer(rangeHeader, ","); |
| |
| // Parsing the range list |
| while (commaTokenizer.hasMoreTokens()) { |
| String rangeDefinition = commaTokenizer.nextToken().trim(); |
| |
| Range currentRange = new Range(); |
| currentRange.length = fileLength; |
| |
| int dashPos = rangeDefinition.indexOf('-'); |
| |
| if (dashPos == -1) { |
| response.addHeader("Content-Range", "bytes */" + fileLength); |
| response.sendError |
| (HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); |
| return null; |
| } |
| |
| if (dashPos == 0) { |
| |
| try { |
| long offset = Long.parseLong(rangeDefinition); |
| currentRange.start = fileLength + offset; |
| currentRange.end = fileLength - 1; |
| } catch (NumberFormatException e) { |
| response.addHeader("Content-Range", |
| "bytes */" + fileLength); |
| response.sendError |
| (HttpServletResponse |
| .SC_REQUESTED_RANGE_NOT_SATISFIABLE); |
| return null; |
| } |
| |
| } else { |
| |
| try { |
| currentRange.start = Long.parseLong |
| (rangeDefinition.substring(0, dashPos)); |
| if (dashPos < rangeDefinition.length() - 1) |
| currentRange.end = Long.parseLong |
| (rangeDefinition.substring |
| (dashPos + 1, rangeDefinition.length())); |
| else |
| currentRange.end = fileLength - 1; |
| } catch (NumberFormatException e) { |
| response.addHeader("Content-Range", |
| "bytes */" + fileLength); |
| response.sendError |
| (HttpServletResponse |
| .SC_REQUESTED_RANGE_NOT_SATISFIABLE); |
| return null; |
| } |
| |
| } |
| |
| if (!currentRange.validate()) { |
| response.addHeader("Content-Range", "bytes */" + fileLength); |
| response.sendError |
| (HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); |
| return null; |
| } |
| |
| result.add(currentRange); |
| } |
| |
| return result; |
| } |
| |
| |
| |
| /** |
| * Decide which way to render. HTML or XML. |
| */ |
| protected InputStream render |
| (String contextPath, CacheEntry cacheEntry) { |
| InputStream xsltInputStream = |
| findXsltInputStream(cacheEntry.context); |
| |
| if (xsltInputStream==null) { |
| return renderHtml(contextPath, cacheEntry); |
| } else { |
| return renderXml(contextPath, cacheEntry, xsltInputStream); |
| } |
| |
| } |
| |
| /** |
| * Return an InputStream to an HTML representation of the contents |
| * of this directory. |
| * |
| * @param contextPath Context path to which our internal paths are |
| * relative |
| */ |
| protected InputStream renderXml(String contextPath, |
| CacheEntry cacheEntry, |
| InputStream xsltInputStream) { |
| |
| StringBuffer sb = new StringBuffer(); |
| |
| sb.append("<?xml version=\"1.0\"?>"); |
| sb.append("<listing "); |
| sb.append(" contextPath='"); |
| sb.append(contextPath); |
| sb.append("'"); |
| sb.append(" directory='"); |
| sb.append(cacheEntry.name); |
| sb.append("' "); |
| sb.append(" hasParent='").append(!cacheEntry.name.equals("/")); |
| sb.append("'>"); |
| |
| sb.append("<entries>"); |
| |
| try { |
| |
| // Render the directory entries within this directory |
| NamingEnumeration enumeration = resources.list(cacheEntry.name); |
| |
| // rewriteUrl(contextPath) is expensive. cache result for later reuse |
| String rewrittenContextPath = rewriteUrl(contextPath); |
| |
| while (enumeration.hasMoreElements()) { |
| |
| NameClassPair ncPair = (NameClassPair) enumeration.nextElement(); |
| String resourceName = ncPair.getName(); |
| String trimmed = resourceName/*.substring(trim)*/; |
| if (trimmed.equalsIgnoreCase("WEB-INF") || |
| trimmed.equalsIgnoreCase("META-INF") || |
| trimmed.equalsIgnoreCase(localXsltFile)) |
| continue; |
| |
| CacheEntry childCacheEntry = |
| resources.lookupCache(cacheEntry.name + resourceName); |
| if (!childCacheEntry.exists) { |
| continue; |
| } |
| |
| sb.append("<entry"); |
| sb.append(" type='") |
| .append((childCacheEntry.context != null)?"dir":"file") |
| .append("'"); |
| sb.append(" urlPath='") |
| .append(rewrittenContextPath) |
| .append(rewriteUrl(cacheEntry.name + resourceName)) |
| .append((childCacheEntry.context != null)?"/":"") |
| .append("'"); |
| if (childCacheEntry.resource != null) { |
| sb.append(" size='") |
| .append(renderSize(childCacheEntry.attributes.getContentLength())) |
| .append("'"); |
| } |
| sb.append(" date='") |
| .append(childCacheEntry.attributes.getLastModifiedHttp()) |
| .append("'"); |
| |
| sb.append(">"); |
| sb.append(RequestUtil.filter(trimmed)); |
| if (childCacheEntry.context != null) |
| sb.append("/"); |
| sb.append("</entry>"); |
| |
| } |
| |
| } catch (NamingException e) { |
| // Something went wrong |
| e.printStackTrace(); |
| } |
| |
| sb.append("</entries>"); |
| |
| String readme = getReadme(cacheEntry.context); |
| |
| if (readme!=null) { |
| sb.append("<readme><![CDATA["); |
| sb.append(readme); |
| sb.append("]]></readme>"); |
| } |
| |
| |
| sb.append("</listing>"); |
| |
| |
| try { |
| TransformerFactory tFactory = TransformerFactory.newInstance(); |
| Source xmlSource = new StreamSource(new StringReader(sb.toString())); |
| Source xslSource = new StreamSource(xsltInputStream); |
| Transformer transformer = tFactory.newTransformer(xslSource); |
| |
| ByteArrayOutputStream stream = new ByteArrayOutputStream(); |
| OutputStreamWriter osWriter = new OutputStreamWriter(stream, "UTF8"); |
| StreamResult out = new StreamResult(osWriter); |
| transformer.transform(xmlSource, out); |
| osWriter.flush(); |
| return (new ByteArrayInputStream(stream.toByteArray())); |
| } catch (Exception e) { |
| log("directory transform failure: " + e.getMessage()); |
| return renderHtml(contextPath, cacheEntry); |
| } |
| } |
| |
| /** |
| * Return an InputStream to an HTML representation of the contents |
| * of this directory. |
| * |
| * @param contextPath Context path to which our internal paths are |
| * relative |
| */ |
| protected InputStream renderHtml |
| (String contextPath, CacheEntry cacheEntry) { |
| |
| String name = cacheEntry.name; |
| |
| // Number of characters to trim from the beginnings of filenames |
| int trim = name.length(); |
| if (!name.endsWith("/")) |
| trim += 1; |
| if (name.equals("/")) |
| trim = 1; |
| |
| // Prepare a writer to a buffered area |
| ByteArrayOutputStream stream = new ByteArrayOutputStream(); |
| OutputStreamWriter osWriter = null; |
| try { |
| osWriter = new OutputStreamWriter(stream, "UTF8"); |
| } catch (Exception e) { |
| // Should never happen |
| osWriter = new OutputStreamWriter(stream); |
| } |
| PrintWriter writer = new PrintWriter(osWriter); |
| |
| StringBuffer sb = new StringBuffer(); |
| |
| // rewriteUrl(contextPath) is expensive. cache result for later reuse |
| String rewrittenContextPath = rewriteUrl(contextPath); |
| |
| // Render the page header |
| sb.append("<html>\r\n"); |
| sb.append("<head>\r\n"); |
| sb.append("<title>"); |
| sb.append(sm.getString("directory.title", name)); |
| sb.append("</title>\r\n"); |
| sb.append("<STYLE><!--"); |
| sb.append(org.apache.catalina.util.TomcatCSS.TOMCAT_CSS); |
| sb.append("--></STYLE> "); |
| sb.append("</head>\r\n"); |
| sb.append("<body>"); |
| sb.append("<h1>"); |
| sb.append(sm.getString("directory.title", name)); |
| |
| // Render the link to our parent (if required) |
| String parentDirectory = name; |
| if (parentDirectory.endsWith("/")) { |
| parentDirectory = |
| parentDirectory.substring(0, parentDirectory.length() - 1); |
| } |
| int slash = parentDirectory.lastIndexOf('/'); |
| if (slash >= 0) { |
| String parent = name.substring(0, slash); |
| sb.append(" - <a href=\""); |
| sb.append(rewrittenContextPath); |
| if (parent.equals("")) |
| parent = "/"; |
| sb.append(rewriteUrl(parent)); |
| if (!parent.endsWith("/")) |
| sb.append("/"); |
| sb.append("\">"); |
| sb.append("<b>"); |
| sb.append(sm.getString("directory.parent", parent)); |
| sb.append("</b>"); |
| sb.append("</a>"); |
| } |
| |
| sb.append("</h1>"); |
| sb.append("<HR size=\"1\" noshade=\"noshade\">"); |
| |
| sb.append("<table width=\"100%\" cellspacing=\"0\"" + |
| " cellpadding=\"5\" align=\"center\">\r\n"); |
| |
| // Render the column headings |
| sb.append("<tr>\r\n"); |
| sb.append("<td align=\"left\"><font size=\"+1\"><strong>"); |
| sb.append(sm.getString("directory.filename")); |
| sb.append("</strong></font></td>\r\n"); |
| sb.append("<td align=\"center\"><font size=\"+1\"><strong>"); |
| sb.append(sm.getString("directory.size")); |
| sb.append("</strong></font></td>\r\n"); |
| sb.append("<td align=\"right\"><font size=\"+1\"><strong>"); |
| sb.append(sm.getString("directory.lastModified")); |
| sb.append("</strong></font></td>\r\n"); |
| sb.append("</tr>"); |
| |
| try { |
| |
| // Render the directory entries within this directory |
| NamingEnumeration enumeration = resources.list(cacheEntry.name); |
| boolean shade = false; |
| while (enumeration.hasMoreElements()) { |
| |
| NameClassPair ncPair = (NameClassPair) enumeration.nextElement(); |
| String resourceName = ncPair.getName(); |
| String trimmed = resourceName/*.substring(trim)*/; |
| if (trimmed.equalsIgnoreCase("WEB-INF") || |
| trimmed.equalsIgnoreCase("META-INF")) |
| continue; |
| |
| CacheEntry childCacheEntry = |
| resources.lookupCache(cacheEntry.name + resourceName); |
| if (!childCacheEntry.exists) { |
| continue; |
| } |
| |
| sb.append("<tr"); |
| if (shade) |
| sb.append(" bgcolor=\"#eeeeee\""); |
| sb.append(">\r\n"); |
| shade = !shade; |
| |
| sb.append("<td align=\"left\"> \r\n"); |
| sb.append("<a href=\""); |
| sb.append(rewrittenContextPath); |
| resourceName = rewriteUrl(name + resourceName); |
| sb.append(resourceName); |
| if (childCacheEntry.context != null) |
| sb.append("/"); |
| sb.append("\"><tt>"); |
| sb.append(RequestUtil.filter(trimmed)); |
| if (childCacheEntry.context != null) |
| sb.append("/"); |
| sb.append("</tt></a></td>\r\n"); |
| |
| sb.append("<td align=\"right\"><tt>"); |
| if (childCacheEntry.context != null) |
| sb.append(" "); |
| else |
| sb.append(renderSize(childCacheEntry.attributes.getContentLength())); |
| sb.append("</tt></td>\r\n"); |
| |
| sb.append("<td align=\"right\"><tt>"); |
| sb.append(childCacheEntry.attributes.getLastModifiedHttp()); |
| sb.append("</tt></td>\r\n"); |
| |
| sb.append("</tr>\r\n"); |
| } |
| |
| } catch (NamingException e) { |
| // Something went wrong |
| e.printStackTrace(); |
| } |
| |
| // Render the page footer |
| sb.append("</table>\r\n"); |
| |
| sb.append("<HR size=\"1\" noshade=\"noshade\">"); |
| |
| String readme = getReadme(cacheEntry.context); |
| if (readme!=null) { |
| sb.append(readme); |
| sb.append("<HR size=\"1\" noshade=\"noshade\">"); |
| } |
| |
| sb.append("<h3>").append(ServerInfo.getServerInfo()).append("</h3>"); |
| sb.append("</body>\r\n"); |
| sb.append("</html>\r\n"); |
| |
| // Return an input stream to the underlying bytes |
| writer.write(sb.toString()); |
| writer.flush(); |
| return (new ByteArrayInputStream(stream.toByteArray())); |
| |
| } |
| |
| |
| /** |
| * Render the specified file size (in bytes). |
| * |
| * @param size File size (in bytes) |
| */ |
| protected String renderSize(long size) { |
| |
| long leftSide = size / 1024; |
| long rightSide = (size % 1024) / 103; // Makes 1 digit |
| if ((leftSide == 0) && (rightSide == 0) && (size > 0)) |
| rightSide = 1; |
| |
| return ("" + leftSide + "." + rightSide + " kb"); |
| |
| } |
| |
| |
| /** |
| * Get the readme file as a string. |
| */ |
| protected String getReadme(DirContext directory) { |
| if (readmeFile!=null) { |
| try { |
| Object obj = directory.lookup(readmeFile); |
| |
| if (obj!=null && obj instanceof Resource) { |
| StringWriter buffer = new StringWriter(); |
| InputStream is = ((Resource)obj).streamContent(); |
| copyRange(new InputStreamReader(is), |
| new PrintWriter(buffer)); |
| |
| return buffer.toString(); |
| } |
| } catch(IOException ioe) { |
| log("DefaultServlet.getReadme: IO exception: " + ioe.getMessage()); |
| } catch (NamingException ne) { |
| log("DefaultServlet.getReadme: Naming exception: " + ne.getMessage()); |
| } |
| } |
| |
| return null; |
| } |
| |
| |
| /** |
| * Return the xsl template inputstream (if possible) |
| */ |
| protected InputStream findXsltInputStream(DirContext directory) { |
| |
| if (localXsltFile!=null) { |
| try { |
| Object obj = directory.lookup(localXsltFile); |
| if (obj!=null && obj instanceof Resource) { |
| InputStream is = ((Resource)obj).streamContent(); |
| if (is!=null) |
| return is; |
| } |
| } catch(IOException ioe) { |
| log("DefaultServlet.findXsltInputStream: IO exception: " + ioe.getMessage()); |
| } catch (NamingException ne) { |
| log("DefaultServlet.findXsltInputStream: Naming exception: " + ne.getMessage()); |
| } |
| } |
| |
| /* Open and read in file in one fell swoop to reduce chance |
| * chance of leaving handle open. |
| */ |
| if (globalXsltFile!=null) { |
| FileInputStream fis = null; |
| |
| try { |
| File f = new File(globalXsltFile); |
| if (f.exists()){ |
| fis =new FileInputStream(f); |
| byte b[] = new byte[(int)f.length()]; /* danger! */ |
| fis.read(b); |
| return new ByteArrayInputStream(b); |
| } |
| } catch(Exception e) { |
| log("DefaultServlet.findXsltInputStream: can't read " |
| + globalXsltFile); |
| return null; |
| } finally { |
| try { |
| if (fis!=null) |
| fis.close(); |
| } catch(Exception e) { |
| log("DefaultServlet.findXsltInputStream: " |
| + " exception closing input stream: " + e.getMessage()); |
| } |
| } |
| } |
| |
| return null; |
| |
| } |
| |
| |
| // -------------------------------------------------------- protected Methods |
| |
| |
| /** |
| * Check if sendfile can be used. |
| */ |
| protected boolean checkSendfile(HttpServletRequest request, |
| HttpServletResponse response, |
| CacheEntry entry, |
| long length, Range range) { |
| if ((sendfileSize > 0) |
| && (entry.resource != null) |
| && ((length > sendfileSize) || (entry.resource.getContent() == null)) |
| && (entry.attributes.getCanonicalPath() != null) |
| && (Boolean.TRUE == request.getAttribute("org.apache.tomcat.sendfile.support")) |
| && (request.getClass().getName().equals("org.apache.catalina.connector.RequestFacade")) |
| && (response.getClass().getName().equals("org.apache.catalina.connector.ResponseFacade"))) { |
| request.setAttribute("org.apache.tomcat.sendfile.filename", entry.attributes.getCanonicalPath()); |
| if (range == null) { |
| request.setAttribute("org.apache.tomcat.sendfile.start", new Long(0L)); |
| request.setAttribute("org.apache.tomcat.sendfile.end", new Long(length)); |
| } else { |
| request.setAttribute("org.apache.tomcat.sendfile.start", new Long(range.start)); |
| request.setAttribute("org.apache.tomcat.sendfile.end", new Long(range.end + 1)); |
| } |
| request.setAttribute("org.apache.tomcat.sendfile.token", this); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| |
| /** |
| * Check if the if-match condition is satisfied. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * @param resourceInfo File object |
| * @return boolean true if the resource meets the specified condition, |
| * and false if the condition is not satisfied, in which case request |
| * processing is stopped |
| */ |
| protected boolean checkIfMatch(HttpServletRequest request, |
| HttpServletResponse response, |
| ResourceAttributes resourceAttributes) |
| throws IOException { |
| |
| String eTag = getETag(resourceAttributes); |
| String headerValue = request.getHeader("If-Match"); |
| if (headerValue != null) { |
| if (headerValue.indexOf('*') == -1) { |
| |
| StringTokenizer commaTokenizer = new StringTokenizer |
| (headerValue, ","); |
| boolean conditionSatisfied = false; |
| |
| while (!conditionSatisfied && commaTokenizer.hasMoreTokens()) { |
| String currentToken = commaTokenizer.nextToken(); |
| if (currentToken.trim().equals(eTag)) |
| conditionSatisfied = true; |
| } |
| |
| // If none of the given ETags match, 412 Precodition failed is |
| // sent back |
| if (!conditionSatisfied) { |
| response.sendError |
| (HttpServletResponse.SC_PRECONDITION_FAILED); |
| return false; |
| } |
| |
| } |
| } |
| return true; |
| |
| } |
| |
| |
| /** |
| * Check if the if-modified-since condition is satisfied. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * @param resourceInfo File object |
| * @return boolean true if the resource meets the specified condition, |
| * and false if the condition is not satisfied, in which case request |
| * processing is stopped |
| */ |
| protected boolean checkIfModifiedSince(HttpServletRequest request, |
| HttpServletResponse response, |
| ResourceAttributes resourceAttributes) |
| throws IOException { |
| try { |
| long headerValue = request.getDateHeader("If-Modified-Since"); |
| long lastModified = resourceAttributes.getLastModified(); |
| if (headerValue != -1) { |
| |
| // If an If-None-Match header has been specified, if modified since |
| // is ignored. |
| if ((request.getHeader("If-None-Match") == null) |
| && (lastModified < headerValue + 1000)) { |
| // The entity has not been modified since the date |
| // specified by the client. This is not an error case. |
| response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); |
| response.setHeader("ETag", getETag(resourceAttributes)); |
| |
| return false; |
| } |
| } |
| } catch(IllegalArgumentException illegalArgument) { |
| return true; |
| } |
| return true; |
| |
| } |
| |
| |
| /** |
| * Check if the if-none-match condition is satisfied. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * @param resourceInfo File object |
| * @return boolean true if the resource meets the specified condition, |
| * and false if the condition is not satisfied, in which case request |
| * processing is stopped |
| */ |
| protected boolean checkIfNoneMatch(HttpServletRequest request, |
| HttpServletResponse response, |
| ResourceAttributes resourceAttributes) |
| throws IOException { |
| |
| String eTag = getETag(resourceAttributes); |
| String headerValue = request.getHeader("If-None-Match"); |
| if (headerValue != null) { |
| |
| boolean conditionSatisfied = false; |
| |
| if (!headerValue.equals("*")) { |
| |
| StringTokenizer commaTokenizer = |
| new StringTokenizer(headerValue, ","); |
| |
| while (!conditionSatisfied && commaTokenizer.hasMoreTokens()) { |
| String currentToken = commaTokenizer.nextToken(); |
| if (currentToken.trim().equals(eTag)) |
| conditionSatisfied = true; |
| } |
| |
| } else { |
| conditionSatisfied = true; |
| } |
| |
| if (conditionSatisfied) { |
| |
| // For GET and HEAD, we should respond with |
| // 304 Not Modified. |
| // For every other method, 412 Precondition Failed is sent |
| // back. |
| if ( ("GET".equals(request.getMethod())) |
| || ("HEAD".equals(request.getMethod())) ) { |
| response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); |
| response.setHeader("ETag", getETag(resourceAttributes)); |
| |
| return false; |
| } else { |
| response.sendError |
| (HttpServletResponse.SC_PRECONDITION_FAILED); |
| return false; |
| } |
| } |
| } |
| return true; |
| |
| } |
| |
| |
| /** |
| * Check if the if-unmodified-since condition is satisfied. |
| * |
| * @param request The servlet request we are processing |
| * @param response The servlet response we are creating |
| * @param resourceInfo File object |
| * @return boolean true if the resource meets the specified condition, |
| * and false if the condition is not satisfied, in which case request |
| * processing is stopped |
| */ |
| protected boolean checkIfUnmodifiedSince(HttpServletRequest request, |
| HttpServletResponse response, |
| ResourceAttributes resourceAttributes) |
| throws IOException { |
| try { |
| long lastModified = resourceAttributes.getLastModified(); |
| long headerValue = request.getDateHeader("If-Unmodified-Since"); |
| if (headerValue != -1) { |
| if ( lastModified >= (headerValue + 1000)) { |
| // The entity has not been modified since the date |
| // specified by the client. This is not an error case. |
| response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); |
| return false; |
| } |
| } |
| } catch(IllegalArgumentException illegalArgument) { |
| return true; |
| } |
| return true; |
| |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param resourceInfo The resource information |
| * @param ostream The output stream to write to |
| * |
| * @exception IOException if an input/output error occurs |
| */ |
| protected void copy(CacheEntry cacheEntry, InputStream is, |
| ServletOutputStream ostream) |
| throws IOException { |
| |
| IOException exception = null; |
| InputStream resourceInputStream = null; |
| |
| // Optimization: If the binary content has already been loaded, send |
| // it directly |
| if (cacheEntry.resource != null) { |
| byte buffer[] = cacheEntry.resource.getContent(); |
| if (buffer != null) { |
| ostream.write(buffer, 0, buffer.length); |
| return; |
| } |
| resourceInputStream = cacheEntry.resource.streamContent(); |
| } else { |
| resourceInputStream = is; |
| } |
| |
| InputStream istream = new BufferedInputStream |
| (resourceInputStream, input); |
| |
| // Copy the input stream to the output stream |
| exception = copyRange(istream, ostream); |
| |
| // Clean up the input stream |
| try { |
| istream.close(); |
| } catch (Exception e) { |
| log("DefaultServlet.copy: exception closing input stream: " |
| + e.getMessage()); |
| } |
| |
| // Rethrow any exception that has occurred |
| if (exception != null) { |
| throw exception; |
| } |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param resourceInfo The resource info |
| * @param writer The writer to write to |
| * |
| * @exception IOException if an input/output error occurs |
| */ |
| protected void copy(CacheEntry cacheEntry, InputStream is, PrintWriter writer) |
| throws IOException { |
| |
| IOException exception = null; |
| |
| InputStream resourceInputStream = null; |
| if (cacheEntry.resource != null) { |
| resourceInputStream = cacheEntry.resource.streamContent(); |
| } else { |
| resourceInputStream = is; |
| } |
| |
| Reader reader; |
| if (fileEncoding == null) { |
| reader = new InputStreamReader(resourceInputStream); |
| } else { |
| reader = new InputStreamReader(resourceInputStream, |
| fileEncoding); |
| } |
| |
| // Copy the input stream to the output stream |
| exception = copyRange(reader, writer); |
| |
| // Clean up the reader |
| try { |
| reader.close(); |
| } catch (Exception e) { |
| log("DefaultServlet.copy: exception closing reader: " |
| + e.getMessage()); |
| } |
| |
| // Rethrow any exception that has occurred |
| if (exception != null) { |
| throw exception; |
| } |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param resourceInfo The ResourceInfo object |
| * @param ostream The output stream to write to |
| * @param range Range the client wanted to retrieve |
| * @exception IOException if an input/output error occurs |
| */ |
| protected void copy(CacheEntry cacheEntry, ServletOutputStream ostream, |
| Range range) |
| throws IOException { |
| |
| IOException exception = null; |
| |
| InputStream resourceInputStream = cacheEntry.resource.streamContent(); |
| InputStream istream = |
| new BufferedInputStream(resourceInputStream, input); |
| exception = copyRange(istream, ostream, range.start, range.end); |
| |
| // Clean up the input stream |
| try { |
| istream.close(); |
| } catch (Exception e) { |
| log("DefaultServlet.copy: exception closing input stream: " |
| + e.getMessage()); |
| } |
| |
| // Rethrow any exception that has occurred |
| if (exception != null) { |
| throw exception; |
| } |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param resourceInfo The ResourceInfo object |
| * @param writer The writer to write to |
| * @param range Range the client wanted to retrieve |
| * @exception IOException if an input/output error occurs |
| */ |
| protected void copy(CacheEntry cacheEntry, PrintWriter writer, |
| Range range) |
| throws IOException { |
| |
| IOException exception = null; |
| |
| InputStream resourceInputStream = cacheEntry.resource.streamContent(); |
| |
| Reader reader; |
| if (fileEncoding == null) { |
| reader = new InputStreamReader(resourceInputStream); |
| } else { |
| reader = new InputStreamReader(resourceInputStream, |
| fileEncoding); |
| } |
| |
| exception = copyRange(reader, writer, range.start, range.end); |
| |
| // Clean up the input stream |
| try { |
| reader.close(); |
| } catch (Exception e) { |
| log("DefaultServlet.copy: exception closing reader: " |
| + e.getMessage()); |
| } |
| |
| // Rethrow any exception that has occurred |
| if (exception != null) { |
| throw exception; |
| } |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param resourceInfo The ResourceInfo object |
| * @param ostream The output stream to write to |
| * @param ranges Enumeration of the ranges the client wanted to retrieve |
| * @param contentType Content type of the resource |
| * @exception IOException if an input/output error occurs |
| */ |
| protected void copy(CacheEntry cacheEntry, ServletOutputStream ostream, |
| Iterator ranges, String contentType) |
| throws IOException { |
| |
| IOException exception = null; |
| |
| while ( (exception == null) && (ranges.hasNext()) ) { |
| |
| InputStream resourceInputStream = cacheEntry.resource.streamContent(); |
| InputStream istream = |
| new BufferedInputStream(resourceInputStream, input); |
| |
| Range currentRange = (Range) ranges.next(); |
| |
| // Writing MIME header. |
| ostream.println(); |
| ostream.println("--" + mimeSeparation); |
| if (contentType != null) |
| ostream.println("Content-Type: " + contentType); |
| ostream.println("Content-Range: bytes " + currentRange.start |
| + "-" + currentRange.end + "/" |
| + currentRange.length); |
| ostream.println(); |
| |
| // Printing content |
| exception = copyRange(istream, ostream, currentRange.start, |
| currentRange.end); |
| |
| try { |
| istream.close(); |
| } catch (Exception e) { |
| log("DefaultServlet.copy: exception closing input stream: " |
| + e.getMessage()); |
| } |
| |
| } |
| |
| ostream.println(); |
| ostream.print("--" + mimeSeparation + "--"); |
| |
| // Rethrow any exception that has occurred |
| if (exception != null) { |
| throw exception; |
| } |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param resourceInfo The ResourceInfo object |
| * @param writer The writer to write to |
| * @param ranges Enumeration of the ranges the client wanted to retrieve |
| * @param contentType Content type of the resource |
| * @exception IOException if an input/output error occurs |
| */ |
| protected void copy(CacheEntry cacheEntry, PrintWriter writer, |
| Iterator ranges, String contentType) |
| throws IOException { |
| |
| IOException exception = null; |
| |
| while ( (exception == null) && (ranges.hasNext()) ) { |
| |
| InputStream resourceInputStream = cacheEntry.resource.streamContent(); |
| |
| Reader reader; |
| if (fileEncoding == null) { |
| reader = new InputStreamReader(resourceInputStream); |
| } else { |
| reader = new InputStreamReader(resourceInputStream, |
| fileEncoding); |
| } |
| |
| Range currentRange = (Range) ranges.next(); |
| |
| // Writing MIME header. |
| writer.println(); |
| writer.println("--" + mimeSeparation); |
| if (contentType != null) |
| writer.println("Content-Type: " + contentType); |
| writer.println("Content-Range: bytes " + currentRange.start |
| + "-" + currentRange.end + "/" |
| + currentRange.length); |
| writer.println(); |
| |
| // Printing content |
| exception = copyRange(reader, writer, currentRange.start, |
| currentRange.end); |
| |
| try { |
| reader.close(); |
| } catch (Exception e) { |
| log("DefaultServlet.copy: exception closing reader: " |
| + e.getMessage()); |
| } |
| |
| } |
| |
| writer.println(); |
| writer.print("--" + mimeSeparation + "--"); |
| |
| // Rethrow any exception that has occurred |
| if (exception != null) { |
| throw exception; |
| } |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param istream The input stream to read from |
| * @param ostream The output stream to write to |
| * @return Exception which occurred during processing |
| */ |
| protected IOException copyRange(InputStream istream, |
| ServletOutputStream ostream) { |
| |
| // Copy the input stream to the output stream |
| IOException exception = null; |
| byte buffer[] = new byte[input]; |
| int len = buffer.length; |
| while (true) { |
| try { |
| len = istream.read(buffer); |
| if (len == -1) |
| break; |
| ostream.write(buffer, 0, len); |
| } catch (IOException e) { |
| exception = e; |
| len = -1; |
| break; |
| } |
| } |
| return exception; |
| |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param reader The reader to read from |
| * @param writer The writer to write to |
| * @return Exception which occurred during processing |
| */ |
| protected IOException copyRange(Reader reader, PrintWriter writer) { |
| |
| // Copy the input stream to the output stream |
| IOException exception = null; |
| char buffer[] = new char[input]; |
| int len = buffer.length; |
| while (true) { |
| try { |
| len = reader.read(buffer); |
| if (len == -1) |
| break; |
| writer.write(buffer, 0, len); |
| } catch (IOException e) { |
| exception = e; |
| len = -1; |
| break; |
| } |
| } |
| return exception; |
| |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param istream The input stream to read from |
| * @param ostream The output stream to write to |
| * @param start Start of the range which will be copied |
| * @param end End of the range which will be copied |
| * @return Exception which occurred during processing |
| */ |
| protected IOException copyRange(InputStream istream, |
| ServletOutputStream ostream, |
| long start, long end) { |
| |
| if (debug > 10) |
| log("Serving bytes:" + start + "-" + end); |
| |
| try { |
| istream.skip(start); |
| } catch (IOException e) { |
| return e; |
| } |
| |
| IOException exception = null; |
| long bytesToRead = end - start + 1; |
| |
| byte buffer[] = new byte[input]; |
| int len = buffer.length; |
| while ( (bytesToRead > 0) && (len >= buffer.length)) { |
| try { |
| len = istream.read(buffer); |
| if (bytesToRead >= len) { |
| ostream.write(buffer, 0, len); |
| bytesToRead -= len; |
| } else { |
| ostream.write(buffer, 0, (int) bytesToRead); |
| bytesToRead = 0; |
| } |
| } catch (IOException e) { |
| exception = e; |
| len = -1; |
| } |
| if (len < buffer.length) |
| break; |
| } |
| |
| return exception; |
| |
| } |
| |
| |
| /** |
| * Copy the contents of the specified input stream to the specified |
| * output stream, and ensure that both streams are closed before returning |
| * (even in the face of an exception). |
| * |
| * @param reader The reader to read from |
| * @param writer The writer to write to |
| * @param start Start of the range which will be copied |
| * @param end End of the range which will be copied |
| * @return Exception which occurred during processing |
| */ |
| protected IOException copyRange(Reader reader, PrintWriter writer, |
| long start, long end) { |
| |
| try { |
| reader.skip(start); |
| } catch (IOException e) { |
| return e; |
| } |
| |
| IOException exception = null; |
| long bytesToRead = end - start + 1; |
| |
| char buffer[] = new char[input]; |
| int len = buffer.length; |
| while ( (bytesToRead > 0) && (len >= buffer.length)) { |
| try { |
| len = reader.read(buffer); |
| if (bytesToRead >= len) { |
| writer.write(buffer, 0, len); |
| bytesToRead -= len; |
| } else { |
| writer.write(buffer, 0, (int) bytesToRead); |
| bytesToRead = 0; |
| } |
| } catch (IOException e) { |
| exception = e; |
| len = -1; |
| } |
| if (len < buffer.length) |
| break; |
| } |
| |
| return exception; |
| |
| } |
| |
| |
| |
| // ------------------------------------------------------ Range Inner Class |
| |
| |
| protected class Range { |
| |
| public long start; |
| public long end; |
| public long length; |
| |
| /** |
| * Validate range. |
| */ |
| public boolean validate() { |
| if (end >= length) |
| end = length - 1; |
| return ( (start >= 0) && (end >= 0) && (start <= end) |
| && (length > 0) ); |
| } |
| |
| public void recycle() { |
| start = 0; |
| end = 0; |
| length = 0; |
| } |
| |
| } |
| |
| |
| } |
