/*
* Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.net.www;
import java.net.URL;
import java.util.*;
/**
* A class to represent an active connection to an object
* represented by a URL.
* @author James Gosling
*/
abstract public class URLConnection extends java.net.URLConnection {
/** The URL that it is connected to */
private String contentType;
private int contentLength = -1;
protected MessageHeader properties;
/** Create a URLConnection object. These should not be created directly:
instead they should be created by protocol handers in response to
URL.openConnection.
@param u The URL that this connects to.
*/
public URLConnection (URL u) {
super(u);
properties = new MessageHeader();
}
/** Call this routine to get the property list for this object.
* Properties (like content-type) that have explicit getXX() methods
* associated with them should be accessed using those methods. */
public MessageHeader getProperties() {
return properties;
}
/** Call this routine to set the property list for this object. */
public void setProperties(MessageHeader properties) {
this.properties = properties;
}
public void setRequestProperty(String key, String value) {
if(connected)
throw new IllegalAccessError("Already connected");
if (key == null)
throw new NullPointerException ("key cannot be null");
properties.set(key, value);
}
/**
* The following three methods addRequestProperty, getRequestProperty,
* and getRequestProperties were copied from the superclass implementation
* before it was changed by CR:6230836, to maintain backward compatibility.
*/
public void addRequestProperty(String key, String value) {
if (connected)
throw new IllegalStateException("Already connected");
if (key == null)
throw new NullPointerException ("key is null");
}
public String getRequestProperty(String key) {
if (connected)
throw new IllegalStateException("Already connected");
return null;
}
public Map<String,List<String>> getRequestProperties() {
if (connected)
throw new IllegalStateException("Already connected");
return Collections.emptyMap();
}
public String getHeaderField(String name) {
try {
getInputStream();
} catch (Exception e) {
return null;
}
return properties == null ? null : properties.findValue(name);
}
/**
* Return the key for the nth header field. Returns null if
* there are fewer than n fields. This can be used to iterate
* through all the headers in the message.
*/
public String getHeaderFieldKey(int n) {
try {
getInputStream();
} catch (Exception e) {
return null;
}
MessageHeader props = properties;
return props == null ? null : props.getKey(n);
}
/**
* Return the value for the nth header field. Returns null if
* there are fewer than n fields. This can be used in conjunction
* with getHeaderFieldKey to iterate through all the headers in the message.
*/
public String getHeaderField(int n) {
try {
getInputStream();
} catch (Exception e) {
return null;
}
MessageHeader props = properties;
return props == null ? null : props.getValue(n);
}
/** Call this routine to get the content-type associated with this
* object.
*/
public String getContentType() {
if (contentType == null)
contentType = getHeaderField("content-type");
if (contentType == null) {
String ct = null;
try {
ct = guessContentTypeFromStream(getInputStream());
} catch(java.io.IOException e) {
}
String ce = properties.findValue("content-encoding");
if (ct == null) {
ct = properties.findValue("content-type");
if (ct == null)
if (url.getFile().endsWith("/"))
ct = "text/html";
else
ct = guessContentTypeFromName(url.getFile());
}
/*
* If the Mime header had a Content-encoding field and its value
* was not one of the values that essentially indicate no
* encoding, we force the content type to be unknown. This will
* cause a save dialog to be presented to the user. It is not
* ideal but is better than what we were previously doing, namely
* bringing up an image tool for compressed tar files.
*/
if (ct == null || ce != null &&
!(ce.equalsIgnoreCase("7bit")
|| ce.equalsIgnoreCase("8bit")
|| ce.equalsIgnoreCase("binary")))
ct = "content/unknown";
setContentType(ct);
}
return contentType;
}
/**
* Set the content type of this URL to a specific value.
* @param type The content type to use. One of the
* content_* static variables in this
* class should be used.
* eg. setType(URL.content_html);
*/
public void setContentType(String type) {
contentType = type;
properties.set("content-type", type);
}
/** Call this routine to get the content-length associated with this
* object.
*/
public int getContentLength() {
try {
getInputStream();
} catch (Exception e) {
return -1;
}
int l = contentLength;
if (l < 0) {
try {
l = Integer.parseInt(properties.findValue("content-length"));
setContentLength(l);
} catch(Exception e) {
}
}
return l;
}
/** Call this routine to set the content-length associated with this
* object.
*/
protected void setContentLength(int length) {
contentLength = length;
properties.set("content-length", String.valueOf(length));
}
/**
* Returns true if the data associated with this URL can be cached.
*/
public boolean canCache() {
return url.getFile().indexOf('?') < 0 /* && url.postData == null
REMIND */ ;
}
/**
* Call this to close the connection and flush any remaining data.
* Overriders must remember to call super.close()
*/
public void close() {
url = null;
}
private static HashMap<String,Void> proxiedHosts = new HashMap<>();
public synchronized static void setProxiedHost(String host) {
proxiedHosts.put(host.toLowerCase(), null);
}
public synchronized static boolean isProxiedHost(String host) {
return proxiedHosts.containsKey(host.toLowerCase());
}
}