Examples with ManagedServlets io.undertow.servlet.core.ManagedServlets used on opensource projects

Example 1 with ManagedServlets

use of io.undertow.servlet.core.ManagedServlets in project undertow by undertow-io.

the class ServletPathMatches method setupServletChains.

/**
     * Sets up the handlers in the servlet chain. We setup a chain for every path + extension match possibility.
     * (i.e. if there a m path mappings and n extension mappings we have n*m chains).
     * <p/>
     * If a chain consists of only the default servlet then we add it as an async handler, so that resources can be
     * served up directly without using blocking operations.
     * <p/>
     * TODO: this logic is a bit convoluted at the moment, we should look at simplifying it
     */
private ServletPathMatchesData setupServletChains() {
    //create the default servlet
    ServletHandler defaultServlet = null;
    final ManagedServlets servlets = deployment.getServlets();
    final ManagedFilters filters = deployment.getFilters();
    final Map<String, ServletHandler> extensionServlets = new HashMap<>();
    final Map<String, ServletHandler> pathServlets = new HashMap<>();
    final Set<String> pathMatches = new HashSet<>();
    final Set<String> extensionMatches = new HashSet<>();
    DeploymentInfo deploymentInfo = deployment.getDeploymentInfo();
    //loop through all filter mappings, and add them to the set of known paths
    for (FilterMappingInfo mapping : deploymentInfo.getFilterMappings()) {
        if (mapping.getMappingType() == FilterMappingInfo.MappingType.URL) {
            String path = mapping.getMapping();
            if (path.equals("*")) {
                //UNDERTOW-95, support this non-standard filter mapping
                path = "/*";
            }
            if (!path.startsWith("*.")) {
                pathMatches.add(path);
            } else {
                extensionMatches.add(path.substring(2));
            }
        }
    }
    //now loop through all servlets.
    for (Map.Entry<String, ServletHandler> entry : servlets.getServletHandlers().entrySet()) {
        final ServletHandler handler = entry.getValue();
        //add the servlet to the approprite path maps
        for (String path : handler.getManagedServlet().getServletInfo().getMappings()) {
            if (path.equals("/")) {
                //the default servlet
                pathMatches.add("/*");
                if (defaultServlet != null) {
                    throw UndertowServletMessages.MESSAGES.twoServletsWithSameMapping(path);
                }
                defaultServlet = handler;
            } else if (!path.startsWith("*.")) {
                //either an exact or a /* based path match
                if (path.isEmpty()) {
                    path = "/";
                }
                pathMatches.add(path);
                if (pathServlets.containsKey(path)) {
                    throw UndertowServletMessages.MESSAGES.twoServletsWithSameMapping(path);
                }
                pathServlets.put(path, handler);
            } else {
                //an extension match based servlet
                String ext = path.substring(2);
                extensionMatches.add(ext);
                if (extensionServlets.containsKey(ext)) {
                    throw UndertowServletMessages.MESSAGES.twoServletsWithSameMapping(path);
                }
                extensionServlets.put(ext, handler);
            }
        }
    }
    ServletHandler managedDefaultServlet = servlets.getServletHandler(DEFAULT_SERVLET_NAME);
    if (managedDefaultServlet == null) {
        //we always create a default servlet, even if it is not going to have any path mappings registered
        managedDefaultServlet = servlets.addServlet(new ServletInfo(DEFAULT_SERVLET_NAME, DefaultServlet.class));
    }
    if (defaultServlet == null) {
        //no explicit default servlet was specified, so we register our mapping
        pathMatches.add("/*");
        defaultServlet = managedDefaultServlet;
    }
    final ServletPathMatchesData.Builder builder = ServletPathMatchesData.builder();
    //these paths contain both /* and exact matches.
    for (final String path : pathMatches) {
        //resolve the target servlet, will return null if this is the default servlet
        MatchData targetServletMatch = resolveServletForPath(path, pathServlets, extensionServlets, defaultServlet);
        final Map<DispatcherType, List<ManagedFilter>> noExtension = new EnumMap<>(DispatcherType.class);
        final Map<String, Map<DispatcherType, List<ManagedFilter>>> extension = new HashMap<>();
        //any filters that match the extension key
        for (String ext : extensionMatches) {
            extension.put(ext, new EnumMap<DispatcherType, List<ManagedFilter>>(DispatcherType.class));
        }
        //loop over all the filters, and add them to the appropriate map in the correct order
        for (final FilterMappingInfo filterMapping : deploymentInfo.getFilterMappings()) {
            ManagedFilter filter = filters.getManagedFilter(filterMapping.getFilterName());
            if (filterMapping.getMappingType() == FilterMappingInfo.MappingType.SERVLET) {
                if (targetServletMatch.handler != null) {
                    if (filterMapping.getMapping().equals(targetServletMatch.handler.getManagedServlet().getServletInfo().getName()) || filterMapping.getMapping().equals("*")) {
                        addToListMap(noExtension, filterMapping.getDispatcher(), filter);
                    }
                }
                for (Map.Entry<String, Map<DispatcherType, List<ManagedFilter>>> entry : extension.entrySet()) {
                    ServletHandler pathServlet = targetServletMatch.handler;
                    boolean defaultServletMatch = targetServletMatch.defaultServlet;
                    if (defaultServletMatch && extensionServlets.containsKey(entry.getKey())) {
                        pathServlet = extensionServlets.get(entry.getKey());
                    }
                    if (filterMapping.getMapping().equals(pathServlet.getManagedServlet().getServletInfo().getName()) || filterMapping.getMapping().equals("*")) {
                        addToListMap(extension.get(entry.getKey()), filterMapping.getDispatcher(), filter);
                    }
                }
            } else {
                if (filterMapping.getMapping().isEmpty() || !filterMapping.getMapping().startsWith("*.")) {
                    if (isFilterApplicable(path, filterMapping.getMapping())) {
                        addToListMap(noExtension, filterMapping.getDispatcher(), filter);
                        for (Map<DispatcherType, List<ManagedFilter>> l : extension.values()) {
                            addToListMap(l, filterMapping.getDispatcher(), filter);
                        }
                    }
                } else {
                    addToListMap(extension.get(filterMapping.getMapping().substring(2)), filterMapping.getDispatcher(), filter);
                }
            }
        }
        //resolve any matches and add them to the builder
        if (path.endsWith("/*")) {
            String prefix = path.substring(0, path.length() - 2);
            //add the default non-extension match
            builder.addPrefixMatch(prefix, createHandler(deploymentInfo, targetServletMatch.handler, noExtension, targetServletMatch.matchedPath, targetServletMatch.defaultServlet, targetServletMatch.mappingMatch, targetServletMatch.userPath), targetServletMatch.defaultServlet || targetServletMatch.handler.getManagedServlet().getServletInfo().isRequireWelcomeFileMapping());
            //build up the chain for each non-extension match
            for (Map.Entry<String, Map<DispatcherType, List<ManagedFilter>>> entry : extension.entrySet()) {
                ServletHandler pathServlet = targetServletMatch.handler;
                String pathMatch = targetServletMatch.matchedPath;
                boolean defaultServletMatch = targetServletMatch.defaultServlet;
                if (defaultServletMatch && extensionServlets.containsKey(entry.getKey())) {
                    defaultServletMatch = false;
                    pathServlet = extensionServlets.get(entry.getKey());
                }
                HttpHandler handler = pathServlet;
                if (!entry.getValue().isEmpty()) {
                    handler = new FilterHandler(entry.getValue(), deploymentInfo.isAllowNonStandardWrappers(), handler);
                }
                builder.addExtensionMatch(prefix, entry.getKey(), servletChain(handler, pathServlet.getManagedServlet(), pathMatch, deploymentInfo, defaultServletMatch, defaultServletMatch ? MappingMatch.DEFAULT : MappingMatch.EXTENSION, defaultServletMatch ? "/" : "*." + entry.getKey()));
            }
        } else if (path.isEmpty()) {
            //the context root match
            builder.addExactMatch("/", createHandler(deploymentInfo, targetServletMatch.handler, noExtension, targetServletMatch.matchedPath, targetServletMatch.defaultServlet, targetServletMatch.mappingMatch, targetServletMatch.userPath));
        } else {
            //we need to check for an extension match, so paths like /exact.txt will have the correct filter applied
            int lastSegmentIndex = path.lastIndexOf('/');
            String lastSegment;
            if (lastSegmentIndex > 0) {
                lastSegment = path.substring(lastSegmentIndex);
            } else {
                lastSegment = path;
            }
            if (lastSegment.contains(".")) {
                String ext = lastSegment.substring(lastSegment.lastIndexOf('.') + 1);
                if (extension.containsKey(ext)) {
                    Map<DispatcherType, List<ManagedFilter>> extMap = extension.get(ext);
                    builder.addExactMatch(path, createHandler(deploymentInfo, targetServletMatch.handler, extMap, targetServletMatch.matchedPath, targetServletMatch.defaultServlet, targetServletMatch.mappingMatch, targetServletMatch.userPath));
                } else {
                    builder.addExactMatch(path, createHandler(deploymentInfo, targetServletMatch.handler, noExtension, targetServletMatch.matchedPath, targetServletMatch.defaultServlet, targetServletMatch.mappingMatch, targetServletMatch.userPath));
                }
            } else {
                builder.addExactMatch(path, createHandler(deploymentInfo, targetServletMatch.handler, noExtension, targetServletMatch.matchedPath, targetServletMatch.defaultServlet, targetServletMatch.mappingMatch, targetServletMatch.userPath));
            }
        }
    }
    //these are used for name based dispatch
    for (Map.Entry<String, ServletHandler> entry : servlets.getServletHandlers().entrySet()) {
        final Map<DispatcherType, List<ManagedFilter>> filtersByDispatcher = new EnumMap<>(DispatcherType.class);
        for (final FilterMappingInfo filterMapping : deploymentInfo.getFilterMappings()) {
            ManagedFilter filter = filters.getManagedFilter(filterMapping.getFilterName());
            if (filterMapping.getMappingType() == FilterMappingInfo.MappingType.SERVLET) {
                if (filterMapping.getMapping().equals(entry.getKey())) {
                    addToListMap(filtersByDispatcher, filterMapping.getDispatcher(), filter);
                }
            }
        }
        if (filtersByDispatcher.isEmpty()) {
            builder.addNameMatch(entry.getKey(), servletChain(entry.getValue(), entry.getValue().getManagedServlet(), null, deploymentInfo, false, MappingMatch.UNKNOWN, ""));
        } else {
            builder.addNameMatch(entry.getKey(), servletChain(new FilterHandler(filtersByDispatcher, deploymentInfo.isAllowNonStandardWrappers(), entry.getValue()), entry.getValue().getManagedServlet(), null, deploymentInfo, false, MappingMatch.UNKNOWN, ""));
        }
    }
    return builder.build();
}