Repository: knox Updated Branches: refs/heads/master 7c9b30aad -> 47e89d000
KNOX-763 Missing function files Project: http://git-wip-us.apache.org/repos/asf/knox/repo Commit: http://git-wip-us.apache.org/repos/asf/knox/commit/47e89d00 Tree: http://git-wip-us.apache.org/repos/asf/knox/tree/47e89d00 Diff: http://git-wip-us.apache.org/repos/asf/knox/diff/47e89d00 Branch: refs/heads/master Commit: 47e89d000106ed505280662a1a2f53c589b24fa4 Parents: 7c9b30a Author: Sumit Gupta <su...@apache.org> Authored: Wed Nov 16 12:17:47 2016 -0500 Committer: Sumit Gupta <su...@apache.org> Committed: Wed Nov 16 12:17:47 2016 -0500 ---------------------------------------------------------------------- .../impl/html/HtmlImportFunctionDescriptor.java | 30 +++++++ .../impl/html/HtmlImportFunctionProcessor.java | 89 ++++++++++++++++++++ 2 files changed, 119 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/knox/blob/47e89d00/gateway-provider-rewrite/src/main/java/org/apache/hadoop/gateway/filter/rewrite/impl/html/HtmlImportFunctionDescriptor.java ---------------------------------------------------------------------- diff --git a/gateway-provider-rewrite/src/main/java/org/apache/hadoop/gateway/filter/rewrite/impl/html/HtmlImportFunctionDescriptor.java b/gateway-provider-rewrite/src/main/java/org/apache/hadoop/gateway/filter/rewrite/impl/html/HtmlImportFunctionDescriptor.java new file mode 100644 index 0000000..e5bddfd --- /dev/null +++ b/gateway-provider-rewrite/src/main/java/org/apache/hadoop/gateway/filter/rewrite/impl/html/HtmlImportFunctionDescriptor.java @@ -0,0 +1,30 @@ +/** + * 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 + * <p> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p> + * 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.hadoop.gateway.filter.rewrite.impl.html; + +import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteFunctionDescriptor; + +public class HtmlImportFunctionDescriptor implements UrlRewriteFunctionDescriptor<HtmlImportFunctionDescriptor> { + + public static final String FUNCTION_NAME = "import"; + + @Override + public String name() { + return FUNCTION_NAME; + } +} http://git-wip-us.apache.org/repos/asf/knox/blob/47e89d00/gateway-provider-rewrite/src/main/java/org/apache/hadoop/gateway/filter/rewrite/impl/html/HtmlImportFunctionProcessor.java ---------------------------------------------------------------------- diff --git a/gateway-provider-rewrite/src/main/java/org/apache/hadoop/gateway/filter/rewrite/impl/html/HtmlImportFunctionProcessor.java b/gateway-provider-rewrite/src/main/java/org/apache/hadoop/gateway/filter/rewrite/impl/html/HtmlImportFunctionProcessor.java new file mode 100644 index 0000000..27d6ef5 --- /dev/null +++ b/gateway-provider-rewrite/src/main/java/org/apache/hadoop/gateway/filter/rewrite/impl/html/HtmlImportFunctionProcessor.java @@ -0,0 +1,89 @@ +/** + * 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 + * <p> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p> + * 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.hadoop.gateway.filter.rewrite.impl.html; + +import org.apache.hadoop.gateway.filter.rewrite.api.FrontendFunctionDescriptor; +import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteEnvironment; +import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteFunctionDescriptor; +import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteFunctionDescriptorFactory; +import org.apache.hadoop.gateway.filter.rewrite.impl.UrlRewriteFunctionProcessorFactory; +import org.apache.hadoop.gateway.filter.rewrite.spi.UrlRewriteContext; +import org.apache.hadoop.gateway.filter.rewrite.spi.UrlRewriteFunctionProcessor; + +import java.util.Arrays; +import java.util.List; + +/** + * This function enhances the 'frontend' function with the ability to add a prefix to the rewritten frontend portion + * along with the '@import' literal. This is a workaround for the requirement to provide the ability to rewrite + * a portion of html content that contains a tag like the following + * + * <head> <style type=\"text/css\">@import "pretty.css";</style></head> + * + * and needs to be rewritten to something like + * + * <head> <style type=\"text/css\">@import "http://localhost:8443/sandbox/service/pretty.css";;</style></head> + * + * The rewrite rule could then contain the $import function that would delegate to the frontend function. + * + * If there are more than one params passed, the first one is used as a prefix to the value of the frontend function. + * + */ +public class HtmlImportFunctionProcessor implements UrlRewriteFunctionProcessor<HtmlImportFunctionDescriptor> { + + private static final String IMPORT_LITERAL = "@import"; + + private UrlRewriteFunctionProcessor frontend; + + @Override + public void initialize(UrlRewriteEnvironment environment, HtmlImportFunctionDescriptor descriptor) throws Exception { + UrlRewriteFunctionDescriptor frontendDescriptor = UrlRewriteFunctionDescriptorFactory.create(FrontendFunctionDescriptor.FUNCTION_NAME); + frontend = UrlRewriteFunctionProcessorFactory.create(FrontendFunctionDescriptor.FUNCTION_NAME, frontendDescriptor); + frontend.initialize(environment, frontendDescriptor); + } + + @Override + public void destroy() throws Exception { + frontend.destroy(); + } + + @Override + public List<String> resolve(UrlRewriteContext context, List<String> parameters) throws Exception { + String prefix = ""; + if ( parameters != null && parameters.size() > 1 ) { + prefix = parameters.get(0); + parameters = parameters.subList(1, parameters.size()); + } + List<String> frontendValues = frontend.resolve(context, parameters); + StringBuffer buffer = new StringBuffer(IMPORT_LITERAL); + buffer.append(" "); + buffer.append(prefix); + if ( frontendValues != null && frontendValues.size() > 0 ) { + for ( String value : frontendValues ) { + buffer.append(value); + } + } + return Arrays.asList(buffer.toString()); + } + + @Override + public String name() { + return HtmlImportFunctionDescriptor.FUNCTION_NAME; + } + +}
