From e5b7380c874745c989d1816b8f552504f038e1bc Mon Sep 17 00:00:00 2001 From: lresende Date: Thu, 26 Sep 2013 20:33:20 +0000 Subject: 2.0 branch for possible maintenance release git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1526672 13f79535-47bb-0310-9956-ffa450edef68 --- .../tuscany/sca/common/http/HTTPCacheContext.java | 280 +++++++++++++++++++++ 1 file changed, 280 insertions(+) create mode 100644 sca-java-2.x/branches/2.0/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPCacheContext.java (limited to 'sca-java-2.x/branches/2.0/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPCacheContext.java') diff --git a/sca-java-2.x/branches/2.0/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPCacheContext.java b/sca-java-2.x/branches/2.0/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPCacheContext.java new file mode 100644 index 0000000000..08faf6a14b --- /dev/null +++ b/sca-java-2.x/branches/2.0/modules/common-http/src/main/java/org/apache/tuscany/sca/common/http/HTTPCacheContext.java @@ -0,0 +1,280 @@ +/* + * 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.tuscany.sca.common.http; + +import java.text.SimpleDateFormat; +import java.util.Date; + +import javax.servlet.http.HttpServletRequest; + +/** + * A class to store cache settings for Atom and HTTP requests and responses. + * + * Predicates are statements that work in conjunction with + * ETags and LastModified dates to determine if a precondition + * or postcondition is satisfied. + * See HTTP specification for how predicates wrk: + * http://tools.ietf.org/html/rfc2616 + * Example predicates in HTTP include If-Match, If-None-Match, + * If-Modified-Since, If-Unmodified-Since, If-Range. + * + * @version $Rev$ $Date$ + */ +public class HTTPCacheContext { + public static final SimpleDateFormat RFC822DateFormat = new SimpleDateFormat( "EEE, dd MMM yyyy HH:mm:ss Z" ); // RFC 822 date time + + public boolean enabled; + public String eTag; + public String lastModified; + public Date lastModifiedDate; + public boolean ifModifiedSince; + public boolean ifUnmodifiedSince; + public boolean ifMatch; + public boolean ifNoneMatch; + public boolean ifRange; + + + /** + * Enabled is true whenever ETag, LastModified, or predicate is set. + * @return the enabled + */ + public boolean isEnabled() { + return enabled; + } + + /** + * @param enabled the enabled to set + */ + public void setEnabled(boolean enabled) { + this.enabled = enabled; + } + + /** + * An ETag is a unique ID for an item. It changes when + * a field in the item or the update date changes. + * See HTTP specification for how ETags work: + * http://tools.ietf.org/html/rfc2616 + * @return the eTag + */ + public String getETag() { + return eTag; + } + + /** + * @param tag the eTag to set + */ + public void setETag(String tag) { + eTag = tag; + enabled = true; + } + + /** + * The LastModified date is the time the item was last + * changed. See HTTP specification for how ETags work: + * http://tools.ietf.org/html/rfc2616 + * @return the lastModified + */ + public String getLastModified() { + return lastModified; + } + + /** + * The LastModified date is the time the item was last + * changed. See HTTP specification for how ETags work: + * http://tools.ietf.org/html/rfc2616 + * @return the lastModified + */ + public Date getLastModifiedAsDate() { + return lastModifiedDate; + } + + /** + * @param lastModified the lastModified to set + */ + public void setLastModified(String lastModified) throws java.text.ParseException { + this.lastModified = lastModified; + // Catch date formatting on input to help debugging. + lastModifiedDate = RFC822DateFormat.parse( lastModified ); + enabled = true; + } + + /** + * @param lastModified the lastModified to set + */ + public void setLastModified(Date updated) { + this.lastModified = RFC822DateFormat.format( updated ); + lastModifiedDate = updated; + enabled = true; + } + + /** + * @return the ifModifedSince + */ + public boolean isIfModifiedSince() { + return ifModifiedSince; + } + + /** + * @param ifModifedSince the ifModifedSince to set + */ + public void setIfModifiedSince(boolean ifModifiedSince) { + this.ifModifiedSince = ifModifiedSince; + if ( ifModifiedSince ) { + enabled = true; + } + } + + /** + * @return the ifUnModifiedSince + */ + public boolean isIfUnmodifiedSince() { + return ifUnmodifiedSince; + } + + /** + * @param ifUnModifiedSince the ifUnModifiedSince to set + */ + public void setIfUnmodifiedSince(boolean ifUnmodifiedSince) { + this.ifUnmodifiedSince = ifUnmodifiedSince; + if ( ifUnmodifiedSince ) { + enabled = true; + } + } + + /** + * @return the ifMatch + */ + public boolean isIfMatch() { + return ifMatch; + } + + /** + * @param ifMatch the ifMatch to set + */ + public void setIfMatch(boolean ifMatch) { + this.ifMatch = ifMatch; + if ( ifMatch ) { + enabled = true; + } + } + + /** + * @return the ifNoneMatch + */ + public boolean isIfNoneMatch() { + return ifNoneMatch; + } + + /** + * @param ifNoneMatch the ifNoneMatch to set + */ + public void setIfNoneMatch(boolean ifNoneMatch) { + this.ifNoneMatch = ifNoneMatch; + if ( ifNoneMatch ) { + enabled = true; + } + } + + /** + * @return the ifRange + */ + public boolean isIfRange() { + return ifRange; + } + + /** + * @param ifRange the ifRange to set + */ + public void setIfRange(boolean ifRange) { + this.ifRange = ifRange; + if ( ifRange ) { + enabled = true; + } + } + + /** + * Gets the cache context information (ETag, LastModified, predicates) from the Http request. + * @param request + * @return + */ + public static HTTPCacheContext createCacheContextFromRequest( HttpServletRequest request ) throws java.text.ParseException { + HTTPCacheContext context = new HTTPCacheContext(); + + String eTag = request.getHeader( "If-Match" ); + if ( eTag != null ) { + context.setETag( eTag ); + context.setIfMatch( true ); + } + eTag = request.getHeader( "If-None-Match" ); + if ( eTag != null ) { + context.setETag( eTag ); + context.setIfNoneMatch( true ); + } + String lastModifiedString = request.getHeader( "If-Modified-Since" ); + if ( lastModifiedString != null ) { + context.setLastModified( lastModifiedString ); + context.setIfModifiedSince( true ); + } + lastModifiedString = request.getHeader( "If-Unmodified-Since" ); + if ( lastModifiedString != null ) { + context.setLastModified( lastModifiedString ); + context.setIfUnmodifiedSince( true ); + } + lastModifiedString = request.getHeader( "If-Range" ); + if ( lastModifiedString != null ) { + context.setLastModified( lastModifiedString ); + context.setIfRange( true ); + } + return context; + } + + public String toString() { + final String PREDPREFIX = ", predicates="; + StringBuffer sb = new StringBuffer(PREDPREFIX); + if ( ifMatch || ifNoneMatch || ifModifiedSince || ifUnmodifiedSince || ifRange ) { + if ( ifMatch ) { + if ( sb.length() > PREDPREFIX.length() ) sb.append( ", "); + sb.append("If-Match"); + } + if ( ifNoneMatch ) { + if ( sb.length() > PREDPREFIX.length() ) sb.append( ", "); + sb.append("If-None-Match"); + } + if ( ifModifiedSince ) { + if ( sb.length() > PREDPREFIX.length() ) sb.append( ", "); + sb.append("If-Modified-Since"); + } + if ( ifUnmodifiedSince ) { + if ( sb.length() > PREDPREFIX.length() ) sb.append( ", "); + sb.append("If-UnModified-Since"); + } + if ( ifRange ) { + if ( sb.length() > PREDPREFIX.length() ) sb.append( ", "); + sb.append("If-Range"); + } + } else { + sb.append("null"); + } + + return "eTag=" + eTag + ", lastModified=" + lastModified + + sb.toString(); + } + +} -- cgit v1.2.3