| /* |
| * 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.jasper.tagplugins.jstl.core; |
| |
| import org.apache.jasper.compiler.tagplugin.TagPlugin; |
| import org.apache.jasper.compiler.tagplugin.TagPluginContext; |
| import org.apache.jasper.tagplugins.jstl.Util; |
| |
| public class Import implements TagPlugin { |
| |
| public void doTag(TagPluginContext ctxt) { |
| boolean hasContext, hasVar, hasScope, hasVarReader, hasCharEncoding; |
| |
| //flags |
| hasContext = ctxt.isAttributeSpecified("context"); |
| hasVar = ctxt.isAttributeSpecified("var"); |
| hasScope = ctxt.isAttributeSpecified("scope"); |
| hasVarReader = ctxt.isAttributeSpecified("varReader"); |
| hasCharEncoding = ctxt.isAttributeSpecified("charEncoding"); |
| |
| //variables' names |
| String urlName = ctxt.getTemporaryVariableName(); |
| String contextName = ctxt.getTemporaryVariableName(); |
| String iauName = ctxt.getTemporaryVariableName(); // is absolute url |
| String urlObjName = ctxt.getTemporaryVariableName(); //URL object |
| String ucName = ctxt.getTemporaryVariableName(); //URLConnection |
| String inputStreamName = ctxt.getTemporaryVariableName(); |
| String tempReaderName = ctxt.getTemporaryVariableName(); |
| String tempReaderName2 = ctxt.getTemporaryVariableName(); |
| String charSetName = ctxt.getTemporaryVariableName(); |
| String charEncodingName = ctxt.getTemporaryVariableName(); |
| String contentTypeName = ctxt.getTemporaryVariableName(); |
| String varReaderName = ctxt.getTemporaryVariableName(); |
| String servletContextName = ctxt.getTemporaryVariableName(); |
| String servletPathName = ctxt.getTemporaryVariableName(); |
| String requestDispatcherName = ctxt.getTemporaryVariableName(); |
| String irwName = ctxt.getTemporaryVariableName(); //ImportResponseWrapper name |
| String brName = ctxt.getTemporaryVariableName(); //BufferedReader name |
| String sbName = ctxt.getTemporaryVariableName(); //StringBuffer name |
| String tempStringName = ctxt.getTemporaryVariableName(); |
| |
| //is absolute url |
| ctxt.generateJavaSource("boolean " + iauName + ";"); |
| |
| //get the url value |
| ctxt.generateJavaSource("String " + urlName + " = "); |
| ctxt.generateAttribute("url"); |
| ctxt.generateJavaSource(";"); |
| |
| //validate the url |
| ctxt.generateJavaSource("if(" + urlName + " == null || " + urlName + ".equals(\"\")){"); |
| ctxt.generateJavaSource(" throw new JspTagException(\"The \\\"url\\\" attribute " + |
| "illegally evaluated to \\\"null\\\" or \\\"\\\" in <import>\");"); |
| ctxt.generateJavaSource("}"); |
| |
| //initialize the is_absolute_url |
| ctxt.generateJavaSource(iauName + " = " + |
| "org.apache.jasper.tagplugins.jstl.Util.isAbsoluteUrl(" + urlName + ");"); |
| |
| //validate the context |
| if(hasContext){ |
| |
| ctxt.generateJavaSource("String " + contextName + " = "); |
| ctxt.generateAttribute("context"); |
| ctxt.generateJavaSource(";"); |
| |
| ctxt.generateJavaSource("if((!" + contextName + ".startsWith(\"/\")) " + |
| "|| (!" + urlName + ".startsWith(\"/\"))){"); |
| ctxt.generateJavaSource(" throw new JspTagException" + |
| "(\"In URL tags, when the \\\"context\\\" attribute is specified, " + |
| "values of both \\\"context\\\" and \\\"url\\\" must start with \\\"/\\\".\");"); |
| ctxt.generateJavaSource("}"); |
| |
| } |
| |
| //define charset |
| ctxt.generateJavaSource("String " + charSetName + " = null;"); |
| |
| //if the charEncoding attribute is specified |
| if(hasCharEncoding){ |
| |
| //initialize the charEncoding |
| ctxt.generateJavaSource("String " + charEncodingName + " = "); |
| ctxt.generateAttribute("charEncoding"); |
| ctxt.generateJavaSource(";"); |
| |
| //assign appropriate value tp the charset |
| ctxt.generateJavaSource("if(null != " + charEncodingName + " " + |
| "&& !" + charEncodingName + ".equals(\"\")){"); |
| ctxt.generateJavaSource(" " + charSetName + " = " |
| + charEncodingName + ";"); |
| ctxt.generateJavaSource("}"); |
| } |
| |
| //reshape the url string |
| ctxt.generateJavaSource("if(!"+iauName+"){"); |
| ctxt.generateJavaSource(" if(!" + urlName + ".startsWith(\"/\")){"); |
| ctxt.generateJavaSource(" String " + servletPathName + " = " + |
| "((HttpServletRequest)pageContext.getRequest()).getServletPath();"); |
| ctxt.generateJavaSource(" " + urlName + " = " |
| + servletPathName + ".substring(0," + servletPathName + ".lastIndexOf('/')) + '/' + " + urlName + ";"); |
| ctxt.generateJavaSource(" }"); |
| ctxt.generateJavaSource("}"); |
| |
| //if the varReader attribute specified |
| if(hasVarReader){ |
| |
| //get the String value of varReader |
| ctxt.generateJavaSource("String " + varReaderName + " = "); |
| ctxt.generateAttribute("varReader"); |
| ctxt.generateJavaSource(";"); |
| |
| //if the url is absolute url |
| ctxt.generateJavaSource("if(" + iauName + "){"); |
| |
| //get the content of the target |
| ctxt.generateJavaSource(" java.net.URL " + urlObjName + " = new java.net.URL(" + urlName + ");"); |
| ctxt.generateJavaSource(" java.net.URLConnection " + ucName + " = " |
| + urlObjName + ".openConnection();"); |
| ctxt.generateJavaSource(" java.io.InputStream " + inputStreamName + " = " |
| + ucName + ".getInputStream();"); |
| |
| ctxt.generateJavaSource(" if(" + charSetName + " == null){"); |
| ctxt.generateJavaSource(" String " + contentTypeName + " = " |
| + ucName + ".getContentType();"); |
| ctxt.generateJavaSource(" if(null != " + contentTypeName + "){"); |
| ctxt.generateJavaSource(" " + charSetName + " = " + |
| "org.apache.jasper.tagplugins.jstl.Util.getContentTypeAttribute(" + contentTypeName + ", \"charset\");"); |
| ctxt.generateJavaSource(" if(" + charSetName + " == null) " |
| + charSetName + " = org.apache.jasper.tagplugins.jstl.Util.DEFAULT_ENCODING;"); |
| ctxt.generateJavaSource(" }else{"); |
| ctxt.generateJavaSource(" " + charSetName + " = org.apache.jasper.tagplugins.jstl.Util.DEFAULT_ENCODING;"); |
| ctxt.generateJavaSource(" }"); |
| ctxt.generateJavaSource(" }"); |
| |
| if(!hasCharEncoding){ |
| ctxt.generateJavaSource(" String " + contentTypeName + " = " + ucName + ".getContentType();"); |
| } |
| |
| //define the Reader |
| ctxt.generateJavaSource(" java.io.Reader " + tempReaderName + " = null;"); |
| |
| //initialize the Reader object |
| ctxt.generateJavaSource(" try{"); |
| ctxt.generateJavaSource(" " + tempReaderName + " = new java.io.InputStreamReader(" + inputStreamName + ", " + charSetName + ");"); |
| ctxt.generateJavaSource(" }catch(Exception ex){"); |
| ctxt.generateJavaSource(" " + tempReaderName + " = new java.io.InputStreamReader(" + inputStreamName + ", org.apache.jasper.tagplugins.jstl.Util.DEFAULT_ENCODING);"); |
| ctxt.generateJavaSource(" }"); |
| |
| //validate the response |
| ctxt.generateJavaSource(" if(" + ucName + " instanceof java.net.HttpURLConnection){"); |
| ctxt.generateJavaSource(" int status = ((java.net.HttpURLConnection) " + ucName + ").getResponseCode();"); |
| ctxt.generateJavaSource(" if(status < 200 || status > 299){"); |
| ctxt.generateJavaSource(" throw new JspTagException(status + \" \" + " + urlName + ");"); |
| ctxt.generateJavaSource(" }"); |
| ctxt.generateJavaSource(" }"); |
| |
| //set attribute in the page context scope |
| ctxt.generateJavaSource(" pageContext.setAttribute(" + varReaderName + ", " + tempReaderName + ");"); |
| |
| //if the url is relative |
| ctxt.generateJavaSource("}else{"); |
| |
| //if the url is relative, http request is needed |
| ctxt.generateJavaSource(" if (!(pageContext.getRequest() instanceof HttpServletRequest " + |
| "&& pageContext.getResponse() instanceof HttpServletResponse)){"); |
| ctxt.generateJavaSource(" throw new JspTagException(\"Relative <import> from non-HTTP request not allowed\");"); |
| ctxt.generateJavaSource(" }"); |
| |
| //get the servlet context of the context defined in the context attribute |
| ctxt.generateJavaSource(" ServletContext " + servletContextName + " = null;"); |
| if(hasContext){ |
| ctxt.generateJavaSource(" if(null != " + contextName + "){"); |
| ctxt.generateJavaSource(" " + servletContextName + " = pageContext.getServletContext().getContext(" + contextName + ");" ); |
| ctxt.generateJavaSource(" }else{"); |
| ctxt.generateJavaSource(" " + servletContextName + " = pageContext.getServletContext();"); |
| ctxt.generateJavaSource(" }"); |
| }else{ |
| ctxt.generateJavaSource(" " + servletContextName + " = pageContext.getServletContext();"); |
| } |
| |
| // |
| ctxt.generateJavaSource(" if(" + servletContextName + " == null){"); |
| if(hasContext){ |
| ctxt.generateJavaSource(" throw new JspTagException(\"Unable to get RequestDispatcher for Context: \\\" \"+" + contextName + "+\" \\\" and URL: \\\" \" +" + urlName + "+ \" \\\". Verify values and/or enable cross context access.\");"); |
| }else{ |
| ctxt.generateJavaSource(" throw new JspTagException(\"Unable to get RequestDispatcher for URL: \\\" \" +" + urlName + "+ \" \\\". Verify values and/or enable cross context access.\");"); |
| } |
| ctxt.generateJavaSource(" }"); |
| |
| //get the request dispatcher |
| ctxt.generateJavaSource(" RequestDispatcher " + requestDispatcherName + " = " + servletContextName + ".getRequestDispatcher(org.apache.jasper.tagplugins.jstl.Util.stripSession("+urlName+"));"); |
| ctxt.generateJavaSource(" if(" + requestDispatcherName + " == null) throw new JspTagException(org.apache.jasper.tagplugins.jstl.Util.stripSession("+urlName+"));"); |
| |
| //initialize a ImportResponseWrapper to include the resource |
| ctxt.generateJavaSource(" org.apache.jasper.tagplugins.jstl.Util.ImportResponseWrapper " + irwName + " = new org.apache.jasper.tagplugins.jstl.Util.ImportResponseWrapper((HttpServletResponse) pageContext.getResponse());"); |
| ctxt.generateJavaSource(" if(" + charSetName + " == null){"); |
| ctxt.generateJavaSource(" " + charSetName + " = org.apache.jasper.tagplugins.jstl.Util.DEFAULT_ENCODING;"); |
| ctxt.generateJavaSource(" }"); |
| ctxt.generateJavaSource(" " + irwName + ".setCharEncoding(" + charSetName + ");"); |
| ctxt.generateJavaSource(" try{"); |
| ctxt.generateJavaSource(" " + requestDispatcherName + ".include(pageContext.getRequest(), " + irwName + ");"); |
| ctxt.generateJavaSource(" }catch(java.io.IOException ex){"); |
| ctxt.generateJavaSource(" throw new JspException(ex);"); |
| ctxt.generateJavaSource(" }catch(RuntimeException ex){"); |
| ctxt.generateJavaSource(" throw new JspException(ex);"); |
| ctxt.generateJavaSource(" }catch(ServletException ex){"); |
| ctxt.generateJavaSource(" Throwable rc = ex.getRootCause();"); |
| ctxt.generateJavaSource(" if (rc == null)"); |
| ctxt.generateJavaSource(" throw new JspException(ex);"); |
| ctxt.generateJavaSource(" else"); |
| ctxt.generateJavaSource(" throw new JspException(rc);"); |
| ctxt.generateJavaSource(" }"); |
| |
| //validate the response status |
| ctxt.generateJavaSource(" if(" + irwName + ".getStatus() < 200 || " + irwName + ".getStatus() > 299){"); |
| ctxt.generateJavaSource(" throw new JspTagException(" + irwName + ".getStatus()+\" \" + org.apache.jasper.tagplugins.jstl.Util.stripSession(" + urlName + "));"); |
| ctxt.generateJavaSource(" }"); |
| |
| //push in the page context |
| ctxt.generateJavaSource(" java.io.Reader " + tempReaderName + " = new java.io.StringReader(" + irwName + ".getString());"); |
| ctxt.generateJavaSource(" pageContext.setAttribute(" + varReaderName + ", " + tempReaderName + ");"); |
| |
| ctxt.generateJavaSource("}"); |
| |
| //execute the body action |
| ctxt.generateBody(); |
| |
| //close the reader |
| ctxt.generateJavaSource("java.io.Reader " + tempReaderName2 + " = (java.io.Reader)pageContext.getAttribute(" + varReaderName + ");"); |
| ctxt.generateJavaSource("if(" + tempReaderName2 + " != null) " + tempReaderName2 + ".close();"); |
| ctxt.generateJavaSource("pageContext.removeAttribute(" + varReaderName + ",1);"); |
| } |
| |
| //if the varReader is not specified |
| else{ |
| |
| ctxt.generateJavaSource("pageContext.setAttribute(\"url_without_param\"," + urlName + ");"); |
| ctxt.generateBody(); |
| ctxt.generateJavaSource(urlName + " = (String)pageContext.getAttribute(\"url_without_param\");"); |
| ctxt.generateJavaSource("pageContext.removeAttribute(\"url_without_param\");"); |
| String strScope = "page"; |
| if(hasScope){ |
| strScope = ctxt.getConstantAttribute("scope"); |
| } |
| int iScope = Util.getScope(strScope); |
| |
| ctxt.generateJavaSource("String " + tempStringName + " = null;"); |
| |
| ctxt.generateJavaSource("if(" + iauName + "){"); |
| |
| //get the content of the target |
| ctxt.generateJavaSource(" java.net.URL " + urlObjName + " = new java.net.URL(" + urlName + ");"); |
| ctxt.generateJavaSource(" java.net.URLConnection " + ucName + " = " + urlObjName + ".openConnection();"); |
| ctxt.generateJavaSource(" java.io.InputStream " + inputStreamName + " = " + ucName + ".getInputStream();"); |
| ctxt.generateJavaSource(" java.io.Reader " + tempReaderName + " = null;"); |
| |
| ctxt.generateJavaSource(" if(" + charSetName + " == null){"); |
| ctxt.generateJavaSource(" String " + contentTypeName + " = " |
| + ucName + ".getContentType();"); |
| ctxt.generateJavaSource(" if(null != " + contentTypeName + "){"); |
| ctxt.generateJavaSource(" " + charSetName + " = " + |
| "org.apache.jasper.tagplugins.jstl.Util.getContentTypeAttribute(" + contentTypeName + ", \"charset\");"); |
| ctxt.generateJavaSource(" if(" + charSetName + " == null) " |
| + charSetName + " = org.apache.jasper.tagplugins.jstl.Util.DEFAULT_ENCODING;"); |
| ctxt.generateJavaSource(" }else{"); |
| ctxt.generateJavaSource(" " + charSetName + " = org.apache.jasper.tagplugins.jstl.Util.DEFAULT_ENCODING;"); |
| ctxt.generateJavaSource(" }"); |
| ctxt.generateJavaSource(" }"); |
| |
| ctxt.generateJavaSource(" try{"); |
| ctxt.generateJavaSource(" " + tempReaderName + " = new java.io.InputStreamReader(" + inputStreamName + "," + charSetName + ");"); |
| ctxt.generateJavaSource(" }catch(Exception ex){"); |
| //ctxt.generateJavaSource(" throw new JspTagException(ex.toString());"); |
| ctxt.generateJavaSource(" " + tempReaderName + " = new java.io.InputStreamReader(" + inputStreamName + ",org.apache.jasper.tagplugins.jstl.Util.DEFAULT_ENCODING);"); |
| ctxt.generateJavaSource(" }"); |
| |
| //validate the response |
| ctxt.generateJavaSource(" if(" + ucName + " instanceof java.net.HttpURLConnection){"); |
| ctxt.generateJavaSource(" int status = ((java.net.HttpURLConnection) " + ucName + ").getResponseCode();"); |
| ctxt.generateJavaSource(" if(status < 200 || status > 299){"); |
| ctxt.generateJavaSource(" throw new JspTagException(status + \" \" + " + urlName + ");"); |
| ctxt.generateJavaSource(" }"); |
| ctxt.generateJavaSource(" }"); |
| |
| ctxt.generateJavaSource(" java.io.BufferedReader " + brName + " = new java.io.BufferedReader(" + tempReaderName + ");"); |
| ctxt.generateJavaSource(" StringBuffer " + sbName + " = new StringBuffer();"); |
| String index = ctxt.getTemporaryVariableName(); |
| ctxt.generateJavaSource(" int " + index + ";"); |
| ctxt.generateJavaSource(" while(("+index+" = "+brName+".read()) != -1) "+sbName+".append((char)"+index+");"); |
| ctxt.generateJavaSource(" " + tempStringName + " = " +sbName + ".toString();"); |
| |
| ctxt.generateJavaSource("}else{"); |
| |
| //if the url is relative, http request is needed. |
| ctxt.generateJavaSource(" if (!(pageContext.getRequest() instanceof HttpServletRequest " + |
| "&& pageContext.getResponse() instanceof HttpServletResponse)){"); |
| ctxt.generateJavaSource(" throw new JspTagException(\"Relative <import> from non-HTTP request not allowed\");"); |
| ctxt.generateJavaSource(" }"); |
| |
| //get the servlet context of the context defined in the context attribute |
| ctxt.generateJavaSource(" ServletContext " + servletContextName + " = null;"); |
| if(hasContext){ |
| ctxt.generateJavaSource(" if(null != " + contextName + "){"); |
| ctxt.generateJavaSource(" " + servletContextName + " = pageContext.getServletContext().getContext(" + contextName + ");" ); |
| ctxt.generateJavaSource(" }else{"); |
| ctxt.generateJavaSource(" " + servletContextName + " = pageContext.getServletContext();"); |
| ctxt.generateJavaSource(" }"); |
| }else{ |
| ctxt.generateJavaSource(" " + servletContextName + " = pageContext.getServletContext();"); |
| } |
| |
| // |
| ctxt.generateJavaSource(" if(" + servletContextName + " == null){"); |
| if(hasContext){ |
| ctxt.generateJavaSource(" throw new JspTagException(\"Unable to get RequestDispatcher for Context: \\\" \" +" + contextName + "+ \" \\\" and URL: \\\" \" +" + urlName + "+ \" \\\". Verify values and/or enable cross context access.\");"); |
| }else{ |
| ctxt.generateJavaSource(" throw new JspTagException(\"Unable to get RequestDispatcher for URL: \\\" \" +" + urlName + "+ \" \\\". Verify values and/or enable cross context access.\");"); |
| } |
| ctxt.generateJavaSource(" }"); |
| |
| //get the request dispatcher |
| ctxt.generateJavaSource(" RequestDispatcher " + requestDispatcherName + " = " + servletContextName + ".getRequestDispatcher(org.apache.jasper.tagplugins.jstl.Util.stripSession("+urlName+"));"); |
| ctxt.generateJavaSource(" if(" + requestDispatcherName + " == null) throw new JspTagException(org.apache.jasper.tagplugins.jstl.Util.stripSession("+urlName+"));"); |
| |
| //initialize a ImportResponseWrapper to include the resource |
| ctxt.generateJavaSource(" org.apache.jasper.tagplugins.jstl.Util.ImportResponseWrapper " + irwName + " = new org.apache.jasper.tagplugins.jstl.Util.ImportResponseWrapper((HttpServletResponse) pageContext.getResponse());"); |
| ctxt.generateJavaSource(" if(" + charSetName + " == null){"); |
| ctxt.generateJavaSource(" " + charSetName + " = org.apache.jasper.tagplugins.jstl.Util.DEFAULT_ENCODING;"); |
| ctxt.generateJavaSource(" }"); |
| ctxt.generateJavaSource(" " + irwName + ".setCharEncoding(" + charSetName + ");"); |
| ctxt.generateJavaSource(" try{"); |
| ctxt.generateJavaSource(" " + requestDispatcherName + ".include(pageContext.getRequest(), " + irwName + ");"); |
| ctxt.generateJavaSource(" }catch(java.io.IOException ex){"); |
| ctxt.generateJavaSource(" throw new JspException(ex);"); |
| ctxt.generateJavaSource(" }catch(RuntimeException ex){"); |
| ctxt.generateJavaSource(" throw new JspException(ex);"); |
| ctxt.generateJavaSource(" }catch(ServletException ex){"); |
| ctxt.generateJavaSource(" Throwable rc = ex.getRootCause();"); |
| ctxt.generateJavaSource(" if (rc == null)"); |
| ctxt.generateJavaSource(" throw new JspException(ex);"); |
| ctxt.generateJavaSource(" else"); |
| ctxt.generateJavaSource(" throw new JspException(rc);"); |
| ctxt.generateJavaSource(" }"); |
| |
| //validate the response status |
| ctxt.generateJavaSource(" if(" + irwName + ".getStatus() < 200 || " + irwName + ".getStatus() > 299){"); |
| ctxt.generateJavaSource(" throw new JspTagException(" + irwName + ".getStatus()+\" \" + org.apache.jasper.tagplugins.jstl.Util.stripSession(" + urlName + "));"); |
| ctxt.generateJavaSource(" }"); |
| |
| ctxt.generateJavaSource(" " + tempStringName + " = " + irwName + ".getString();"); |
| |
| ctxt.generateJavaSource("}"); |
| |
| if(hasVar){ |
| String strVar = ctxt.getConstantAttribute("var"); |
| ctxt.generateJavaSource("pageContext.setAttribute(\""+strVar+"\"," + tempStringName + "," + iScope + ");"); |
| }else{ |
| ctxt.generateJavaSource("pageContext.getOut().print(" + tempStringName + ");"); |
| } |
| } |
| } |
| |
| |
| |
| } |
