sun.net.httpserver.ExchangeImpl Maven / Gradle / Ivy
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/*
* @(#)ExchangeImpl.java 1.10 07/03/12
*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package sun.net.httpserver;
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.net.*;
import javax.net.ssl.*;
import java.util.*;
import java.text.*;
import sun.net.www.MessageHeader;
import com.sun.net.httpserver.*;
import com.sun.net.httpserver.spi.*;
class ExchangeImpl {
Headers reqHdrs, rspHdrs;
Request req;
String method;
URI uri;
HttpConnection connection;
int reqContentLen;
long rspContentLen;
/* raw streams which access the socket directly */
InputStream ris;
OutputStream ros;
Thread thread;
/* close the underlying connection when this exchange finished */
boolean close;
boolean closed;
boolean http10 = false;
/* for formatting the Date: header */
static TimeZone tz;
static DateFormat df;
static {
String pattern = "EEE, dd MMM yyyy HH:mm:ss zzz";
tz = TimeZone.getTimeZone ("GMT");
df = new SimpleDateFormat (pattern, Locale.US);
df.setTimeZone (tz);
}
/* streams which take care of the HTTP protocol framing
* and are passed up to higher layers
*/
InputStream uis;
OutputStream uos;
LeftOverInputStream uis_orig; // uis may have be a user supplied wrapper
PlaceholderOutputStream uos_orig;
boolean sentHeaders; /* true after response headers sent */
Map attributes;
int rcode = -1;
HttpPrincipal principal;
ServerImpl server;
ExchangeImpl (
String m, URI u, Request req, int len, HttpConnection connection
) throws IOException {
this.req = req;
this.reqHdrs = req.headers();
this.rspHdrs = new Headers();
this.method = m;
this.uri = u;
this.connection = connection;
this.reqContentLen = len;
/* ros only used for headers, body written directly to stream */
this.ros = req.outputStream();
this.ris = req.inputStream();
server = getServerImpl();
server.startExchange();
}
public Headers getRequestHeaders () {
return new UnmodifiableHeaders (reqHdrs);
}
public Headers getResponseHeaders () {
return rspHdrs;
}
public URI getRequestURI () {
return uri;
}
public String getRequestMethod (){
return method;
}
public HttpContextImpl getHttpContext (){
return connection.getHttpContext();
}
public void close () {
if (closed) {
return;
}
closed = true;
/* close the underlying connection if,
* a) the streams not set up yet, no response can be sent, or
* b) if the wrapper output stream is not set up, or
* c) if the close of the input/outpu stream fails
*/
try {
if (uis_orig == null || uos == null) {
connection.close();
return;
}
if (!uos_orig.isWrapped()) {
connection.close();
return;
}
if (!uis_orig.isClosed()) {
uis_orig.close();
}
uos.close();
} catch (IOException e) {
connection.close();
}
}
public InputStream getRequestBody () {
if (uis != null) {
return uis;
}
if (reqContentLen == -1) {
uis_orig = new ChunkedInputStream (this, ris);
uis = uis_orig;
} else {
uis_orig = new FixedLengthInputStream (this, ris, reqContentLen);
uis = uis_orig;
}
return uis;
}
LeftOverInputStream getOriginalInputStream () {
return uis_orig;
}
public int getResponseCode () {
return rcode;
}
public OutputStream getResponseBody () {
/* TODO. Change spec to remove restriction below. Filters
* cannot work with this restriction
*
* if (!sentHeaders) {
* throw new IllegalStateException ("headers not sent");
* }
*/
if (uos == null) {
uos_orig = new PlaceholderOutputStream (null);
uos = uos_orig;
}
return uos;
}
/* returns the place holder stream, which is the stream
* returned from the 1st call to getResponseBody()
* The "real" ouputstream is then placed inside this
*/
PlaceholderOutputStream getPlaceholderResponseBody () {
getResponseBody();
return uos_orig;
}
public void sendResponseHeaders (int rCode, long contentLen)
throws IOException
{
if (sentHeaders) {
throw new IOException ("headers already sent");
}
this.rcode = rCode;
String statusLine = "HTTP/1.1 "+rCode+Code.msg(rCode)+"\r\n";
OutputStream tmpout = new BufferedOutputStream (ros);
PlaceholderOutputStream o = getPlaceholderResponseBody();
tmpout.write (bytes(statusLine, 0), 0, statusLine.length());
boolean noContentToSend = false; // assume there is content
rspHdrs.set ("Date", df.format (new Date()));
if (contentLen == 0) {
if (http10) {
o.setWrappedStream (new UndefLengthOutputStream (this, ros));
close = true;
} else {
rspHdrs.set ("Transfer-encoding", "chunked");
o.setWrappedStream (new ChunkedOutputStream (this, ros));
}
} else {
if (contentLen == -1) {
noContentToSend = true;
contentLen = 0;
}
/* content len might already be set, eg to implement HEAD resp */
if (rspHdrs.getFirst ("Content-length") == null) {
rspHdrs.set ("Content-length", Long.toString(contentLen));
}
o.setWrappedStream (new FixedLengthOutputStream (this, ros, contentLen));
}
write (rspHdrs, tmpout);
this.rspContentLen = contentLen;
tmpout.flush() ;
tmpout = null;
sentHeaders = true;
if (noContentToSend) {
WriteFinishedEvent e = new WriteFinishedEvent (this);
server.addEvent (e);
closed = true;
}
server.logReply (rCode, req.requestLine(), null);
}
void write (Headers map, OutputStream os) throws IOException {
Set>> entries = map.entrySet();
for (Map.Entry> entry : entries) {
String key = entry.getKey();
byte[] buf;
List values = entry.getValue();
for (String val : values) {
int i = key.length();
buf = bytes (key, 2);
buf[i++] = ':';
buf[i++] = ' ';
os.write (buf, 0, i);
buf = bytes (val, 2);
i = val.length();
buf[i++] = '\r';
buf[i++] = '\n';
os.write (buf, 0, i);
}
}
os.write ('\r');
os.write ('\n');
}
private byte[] rspbuf = new byte [128]; // used by bytes()
/**
* convert string to byte[], using rspbuf
* Make sure that at least "extra" bytes are free at end
* of rspbuf. Reallocate rspbuf if not big enough.
* caller must check return value to see if rspbuf moved
*/
private byte[] bytes (String s, int extra) {
int slen = s.length();
if (slen+extra > rspbuf.length) {
int diff = slen + extra - rspbuf.length;
rspbuf = new byte [2* (rspbuf.length + diff)];
}
char c[] = s.toCharArray();
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