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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/gnu/java/net/protocol/core/Connection.java
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diff --git a/libjava/gnu/java/net/protocol/core/Connection.java b/libjava/gnu/java/net/protocol/core/Connection.java
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+// Connection.java - Implementation of URLConnection for core protocol.
+
+/* Copyright (C) 2001, 2003 Free Software Foundation
+
+ This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
+details. */
+
+package gnu.java.net.protocol.core;
+
+import gnu.gcj.Core;
+import java.io.InputStream;
+import java.io.IOException;
+import java.net.ProtocolException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.Map;
+import java.util.Vector;
+import java.util.Hashtable;
+import java.util.Enumeration;
+
+/**
+ * @author Anthony Green <green@redhat.com>
+ * @date August 13, 2001
+ */
+
+class Connection extends URLConnection
+{
+ private Hashtable hdrHash = new Hashtable();
+ private Vector hdrVec = new Vector();
+ private boolean gotHeaders = false;
+
+ private Core core;
+
+ public Connection (URL url)
+ {
+ super(url);
+ }
+
+ // Implementation of abstract method.
+ public void connect() throws IOException
+ {
+ // Call is ignored if already connected.
+ if (connected)
+ return;
+
+ // If not connected, then file needs to be opened.
+ core = Core.create (url.getFile());
+ connected = true;
+ }
+
+ public InputStream getInputStream() throws IOException
+ {
+ if (!connected)
+ connect();
+
+ if (! doInput)
+ throw new ProtocolException("Can't open InputStream if doInput is false");
+ return new CoreInputStream (core);
+ }
+
+ // Override default method in URLConnection.
+ public String getHeaderField(String name)
+ {
+ try
+ {
+ getHeaders();
+ }
+ catch (IOException x)
+ {
+ return null;
+ }
+ return (String) hdrHash.get(name.toLowerCase());
+ }
+
+ // Override default method in URLConnection.
+ public Map getHeaderFields()
+ {
+ try
+ {
+ getHeaders();
+ }
+ catch (IOException x)
+ {
+ return null;
+ }
+ return hdrHash;
+ }
+
+ // Override default method in URLConnection.
+ public String getHeaderField(int n)
+ {
+ try
+ {
+ getHeaders();
+ }
+ catch (IOException x)
+ {
+ return null;
+ }
+ if (n < hdrVec.size())
+ return getField ((String) hdrVec.elementAt(n));
+
+ return null;
+ }
+
+ // Override default method in URLConnection.
+ public String getHeaderFieldKey(int n)
+ {
+ try
+ {
+ getHeaders();
+ }
+ catch (IOException x)
+ {
+ return null;
+ }
+ if (n < hdrVec.size())
+ return getKey ((String) hdrVec.elementAt(n));
+
+ return null;
+ }
+
+ private String getKey(String str)
+ {
+ if (str == null)
+ return null;
+ int index = str.indexOf(':');
+ if (index >= 0)
+ return str.substring(0, index);
+ else
+ return null;
+ }
+
+ private String getField(String str)
+ {
+ if (str == null)
+ return null;
+ int index = str.indexOf(':');
+ if (index >= 0)
+ return str.substring(index + 1).trim();
+ else
+ return str;
+ }
+
+ private void getHeaders() throws IOException
+ {
+ if (gotHeaders)
+ return;
+ gotHeaders = true;
+
+ connect();
+
+ // Yes, it is overkill to use the hash table and vector here since
+ // we're only putting one header in the file, but in case we need
+ // to add others later and for consistency, we'll implement it this way.
+
+ // Add the only header we know about right now: Content-length.
+ long len = core.length;
+ String line = "Content-length: " + len;
+ hdrVec.addElement(line);
+
+ // The key will never be null in this scenario since we build up the
+ // headers ourselves. If we ever rely on getting a header from somewhere
+ // else, then we may have to check if the result of getKey() is null.
+ String key = getKey(line);
+ hdrHash.put(key.toLowerCase(), Long.toString(len));
+ }
+}
+