/*
* $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/GetMethod.java,v 1.24.2.3 2004/06/13 20:24:49 olegk Exp $
* $Revision: 1.24.2.3 $
* $Date: 2004/06/13 20:24:49 $
*
* ====================================================================
*
* Copyright 1999-2004 The Apache Software Foundation
*
* Licensed 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package org.apache.commons.httpclient.methods;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import org.apache.commons.httpclient.HttpConnection;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpMethodBase;
import org.apache.commons.httpclient.HttpState;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Implements the HTTP GET method.
* <p>
* The HTTP GET method is defined in section 9.3 of
* <a href="http://www.ietf.org/rfc/rfc2616.txt">RFC2616</a>:
* <blockquote>
* The GET method means retrieve whatever information (in the form of an
* entity) is identified by the Request-URI. If the Request-URI refers
* to a data-producing process, it is the produced data which shall be
* returned as the entity in the response and not the source text of the
* process, unless that text happens to be the output of the process.
* </blockquote>
* </p>
* <p>
* GetMethods will follow redirect requests from the http server by default.
* This behavour can be disabled by calling setFollowRedirects(false).</p>
* <p>
* The useDisk methods have been deprecated. Disk I/O is the responsibility
* of the client. If you need to write a response body to a file, you
* can use the following as an example:
* <pre>
* out = new FileOutputStream(myFile);
* InputStream in = getResponseBodyAsStream();
* byte[] buffer = new byte[10000];
* int len ;
* while ((len = in.read(buffer)) > 0) {
* out.write(buffer, 0, len);
* }
* in.close();
* out.close();
* </pre>
* </p>
*
* @author <a href="mailto:[email protected]">Remy Maucherat</a>
* @author Sung-Gu Park
* @author Sean C. Sullivan
* @author <a href="mailto:[email protected]">Mike Bowler</a>
* @author <a href="mailto:[email protected]">Jeff Dever</a>
*
* @version $Revision: 1.24.2.3 $
* @since 1.0
*/
public class GetMethod extends HttpMethodBase {
// -------------------------------------------------------------- Constants
/** Log object for this class. */
private static final Log LOG = LogFactory.getLog(GetMethod.class);
/**
* Temporary directory.
* @deprecated the client is responsible for disk I/O
*/
private static final String TEMP_DIR = "temp/";
// ----------------------------------------------------- Instance Variables
/**
* File which contains the buffered data.
* @deprecated the client is responsible for disk I/O
*/
private File fileData;
/**
* Temporary directory to use.
* @deprecated the client is responsible for disk I/O
*/
private String tempDir = TEMP_DIR;
/**
* Temporary file to use.
* @deprecated the client is responsible for disk I/O
*/
private String tempFile = null;
/**
* By default, the get method will buffer read data to the memory.
* @deprecated the client is responsible for disk I/O
*/
private boolean useDisk = false;
// ----------------------------------------------------------- Constructors
/**
* No-arg constructor.
*
* @since 1.0
*/
public GetMethod() {
setFollowRedirects(true);
}
/**
* Constructor specifying a URI.
*
* @param uri either an absolute or relative URI
*
* @since 1.0
*/
public GetMethod(String uri) {
super(uri);
LOG.trace("enter GetMethod(String)");
setFollowRedirects(true);
}
/**
* Constructor.
*
* @param path the path to request
* @param tempDir the directory in which to store temporary files
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public GetMethod(String path, String tempDir) {
super(path);
LOG.trace("enter GetMethod(String, String)");
setUseDisk(true);
setTempDir(tempDir);
setFollowRedirects(true);
}
/**
* Constructor.
*
* @param path the path to request
* @param tempDir the directory in which to store temporary files
* @param tempFile the file (under tempDir) to buffer contents to
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public GetMethod(String path, String tempDir, String tempFile) {
super(path);
LOG.trace("enter GetMethod(String, String, String)");
setUseDisk(true);
setTempDir(tempDir);
setTempFile(tempFile);
setFollowRedirects(true);
}
/**
* Constructor.
*
* @param path the path to request
* @param fileData the file to buffer contents to
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public GetMethod(String path, File fileData) {
this(path);
LOG.trace("enter GetMethod(String, File)");
useDisk = true;
this.fileData = fileData;
setFollowRedirects(true);
}
//~ Methods ����������������������������������������������������������������
/**
* File data setter.
*
* @param fileData the file to buffer data to
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public void setFileData(File fileData) {
checkNotUsed();
this.fileData = fileData;
}
/**
* File data getter.
*
* @return the file being used for buffering data
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public File getFileData() {
return fileData;
}
// --------------------------------------------------------- Public Methods
/**
* Returns <tt>"GET"</tt>.
*
* @return <tt>"GET"</tt>
*
* @since 2.0
*/
public String getName() {
return "GET";
}
/**
* Temporary directory setter.
*
* @param tempDir New value of tempDir
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public void setTempDir(String tempDir) {
checkNotUsed();
this.tempDir = tempDir;
setUseDisk(true);
}
/**
* Temporary directory getter.
*
* @return the current temporary directory
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public String getTempDir() {
return tempDir;
}
/**
* Temporary file setter.
*
* @param tempFile New value of tempFile
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public void setTempFile(String tempFile) {
checkNotUsed();
this.tempFile = tempFile;
}
/**
* Temporary file getter.
*
* @return the current temporary file
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public String getTempFile() {
return tempFile;
}
// ------------------------------------------------------------- Properties
/**
* Buffer the response in a file or not. The default is false.
*
* @param useDisk If true the entire response will be buffered in a
* temporary file.
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public void setUseDisk(boolean useDisk) {
checkNotUsed();
this.useDisk = useDisk;
}
/**
* Tells if the response will be buffered in a file.
*
* @return true if the response will be buffered
*
* @deprecated the client is responsible for disk I/O
* @since 1.0
*/
public boolean getUseDisk() {
return useDisk;
}
/**
* Recycles the HTTP method so that it can be used again.
* Note that all of the instance variables will be reset
* once this method has been called. This method will also
* release the connection being used by this HTTP method.
*
* @see #releaseConnection()
*
* @since 1.0
*
* @deprecated no longer supported and will be removed in the future
* version of HttpClient
*/
public void recycle() {
LOG.trace("enter GetMethod.recycle()");
super.recycle();
this.fileData = null;
setFollowRedirects(true);
}
// ----------------------------------------------------- HttpMethod Methods
/**
* Overrides method in {@link HttpMethodBase} to write data to the
* appropriate buffer.
*
* @param state the {@link HttpState state} information associated with this method
* @param conn the {@link HttpConnection connection} used to execute
* this HTTP method
*
* @throws IOException if an I/O (transport) error occurs
* @throws HttpException if a protocol exception occurs.
* @throws HttpRecoverableException if a recoverable transport error occurs.
* Usually this kind of exceptions can be recovered from by
* retrying the HTTP method
*
* @see #readResponse
* @see #processResponseBody
*
* @since 2.0
*/
protected void readResponseBody(HttpState state, HttpConnection conn)
throws IOException, HttpException {
LOG.trace("enter GetMethod.readResponseBody(HttpState, HttpConnection)");
super.readResponseBody(state, conn);
OutputStream out = null;
if (useDisk) {
out = new FileOutputStream(createTempFile());
InputStream in = getResponseBodyAsStream();
byte[] buffer = new byte[10000];
int len ;
while ((len = in.read(buffer)) > 0) {
out.write(buffer, 0, len);
}
in.close();
out.close();
setResponseStream(new FileInputStream(createTempFile()));
}
}
/**
* Returns the file buffer, creating it if necessary. The created file is
* deleted when the VM exits.
* @return Temporary file to hold the data buffer.
*
* @deprecated the client is responsible for disk I/O
*/
private File createTempFile() {
if (fileData == null) {
// Create a temporary file on the HD
File dir = new File(tempDir);
dir.deleteOnExit();
dir.mkdirs();
String tempFileName = null;
if (tempFile == null) {
String encodedPath = URLEncoder.encode(getPath());
int length = encodedPath.length();
if (length > 200) {
encodedPath =
encodedPath.substring(length - 190, length);
}
tempFileName = System.currentTimeMillis() + "-"
+ encodedPath + ".tmp";
} else {
tempFileName = tempFile;
}
fileData = new File(tempDir, tempFileName);
fileData = new File(tempDir, tempFileName);
fileData.deleteOnExit();
}
return fileData;
}
}
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