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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program 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 for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmsutil.http;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.util.Enumeration;
import java.util.Hashtable;
/**
* Basic HTTP Message, excluding message body.
* Not optimized for performance.
* Set fields or parse from input.
*/
public class HttpMessage {
protected String mLine = null; // request or response line.
protected Hashtable<String, String> mHeaders = null;
protected String mContent = null; // arbitrary content chars assumed.
/**
* Instantiate a HttpResponse for write to http client.
*/
public HttpMessage() {
mHeaders = new Hashtable<String, String>();
}
/**
* Set a header field. <br>
* Content-length is automatically set on write.<br>
* If value spans multiple lines must be in proper http format for
* multiple lines.
*/
public void setHeader(String name, String value) {
if (mHeaders == null)
mHeaders = new Hashtable<String, String>();
mHeaders.put(name.toLowerCase(), value);
}
/**
* get a header
*/
public String getHeader(String name) {
return mHeaders.get(name.toLowerCase());
}
/**
* write http headers
* does not support values of more than one line
*/
public void writeHeaders(OutputStreamWriter writer)
throws IOException {
if (mHeaders != null) {
Enumeration<String> keys = mHeaders.keys();
String header, value;
while (keys.hasMoreElements()) {
header = keys.nextElement();
value = mHeaders.get(header);
writer.write(header + ":" + value + Http.CRLF);
}
}
writer.write(Http.CRLF); // end with CRLF line.
}
/**
* read http headers.
* does not support values of more than one line or multivalue headers.
*/
public void readHeaders(BufferedReader reader)
throws IOException {
mHeaders = new Hashtable<String, String>();
int colon;
String line, key, value;
while (true) {
line = reader.readLine();
if (line == null || line.equals(""))
break;
colon = line.indexOf(':');
if (colon == -1) {
mHeaders = null;
throw new HttpProtocolException("Bad Http header format");
}
key = line.substring(0, colon);
value = line.substring(colon + 1);
mHeaders.put(key.toLowerCase(), value.trim());
}
}
public void write(OutputStreamWriter writer)
throws IOException {
writer.write(mLine + Http.CRLF);
writeHeaders(writer);
writer.flush();
if (mContent != null) {
writer.write(mContent);
}
writer.flush();
}
public void parse(BufferedReader reader)
throws IOException {
String line = reader.readLine();
if (line == null) {
throw new HttpEofException("End of stream reached");
}
if (line.equals("")) {
throw new HttpProtocolException("Bad Http req/resp line " + line);
}
mLine = line;
readHeaders(reader);
// won't work if content length is not set.
String lenstr = mHeaders.get("content-length");
if (lenstr != null) {
int len = Integer.parseInt(lenstr);
char[] cbuf = new char[len];
int done = reader.read(cbuf, 0, cbuf.length);
int total = done;
while (done >= 0 && total < len) {
done = reader.read(cbuf, total, len - total);
total += done;
}
mContent = new String(cbuf);
} else {
char[] cbuf = new char[8192];
StringWriter sw = new StringWriter();
int charsRead;
while ((charsRead = reader.read(cbuf)) != -1) {
sw.write(cbuf, 0, charsRead);
}
if (sw.getBuffer().length()>0) mContent = sw.toString();
}
}
public void reset() {
mLine = null;
mHeaders = null;
mContent = null;
}
public void setContent(String content) {
mContent = content;
}
public String getContent() {
return mContent;
}
}
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