/*
* Copyright ( c ) 2001 , 2019 , 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 .
*
* 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 .
*/
/**
* @ test
* @ bug 4333920
* @ bug 4394548
* @ library / test / lib
* @ summary Check that chunked encoding response doesn ' t cause
* getInputStream to block until last chunk arrives .
* Also regression against NPE in ChunkedInputStream .
*/
import java.net.*;
import java.io.*;
import java.util.Random;
import jdk.test.lib.net.URIBuilder;
public class ChunkedEncoding implements Runnable {
ServerSocket ss;
/*
* Our " http " server to return a chunked response
*/
public void run() {
try {
Socket s = ss.accept();
PrintStream out = new PrintStream(
new BufferedOutputStream(
s.getOutputStream() ));
/* send the header */
out.print("HTTP/1.1 200\r\n" );
out.print("Transfer-Encoding: chunked\r\n" );
out.print("Content-Type: text/html\r\n" );
out.print("\r\n" );
out.flush();
/* delay the server before first chunk */
Thread .sleep(5000 );
/*
* Our response will be of random length
* but > 32 k
*/
Random rand = new Random();
int len;
do {
len = rand.nextInt(128 *1024 );
} while (len < 32 *1024 );
/*
* Our chunk size will be 2 - 32 k
*/
int chunkSize;
do {
chunkSize = rand.nextInt(len / 3 );
} while (chunkSize < 2 *1024 );
/*
* Generate random content and check sum it
*/
byte buf[] = new byte [len];
int cs = 0 ;
for (int i=0 ; i<len; i++) {
buf[i] = (byte )('a' + rand.nextInt(26 ));
cs = (cs + buf[i]) % 65536 ;
}
/*
* Stream the chunks to the client
*/
int remaining = len;
int pos = 0 ;
while (remaining > 0 ) {
int size = Math.min(remaining, chunkSize);
out.print( Integer.toHexString(size) );
out.print("\r\n" );
out.write( buf, pos, size );
pos += size;
remaining -= size;
out.print("\r\n" );
out.flush();
}
/* send EOF chunk */
out.print("0\r\n" );
out.flush();
/*
* Send trailer with checksum
*/
String trailer = "Checksum:" + cs + "\r\n" ;
out.print(trailer);
out.print("\r\n" );
out.flush();
/*
* Sleep added to avoid connection reset
* on the client side
*/
Thread .sleep(1000 );
s.close();
ss.close();
} catch (Exception e) {
e.printStackTrace();
}
}
ChunkedEncoding() throws Exception {
/* start the server */
ss = new ServerSocket();
ss.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0 ));
(new Thread (this )).start();
/* establish http connection to server */
URL url = URIBuilder.newBuilder()
.scheme("http" )
.loopback()
.port(ss.getLocalPort())
.path("/foo" )
.toURL();
HttpURLConnection http = (HttpURLConnection) url.openConnection(Proxy.NO_PROXY);
/*
* Server should only send headers if TE : trailers
* specified - see updated HTTP 1 . 1 spec .
*/
http.setRequestProperty("TE" , "trailers" );
/* Time how long the getInputStream takes */
long ts = System.currentTimeMillis();
InputStream in = http.getInputStream();
long te = System.currentTimeMillis();
/*
* If getInputStream takes > 2 seconds it probably means
* that the implementation is waiting for the chunks to
* arrive .
*/
if ( (te-ts) > 2000 ) {
throw new Exception("getInputStream didn't return immediately" );
}
/*
* Read the stream and checksum it as it arrives
*/
int nread;
int cs = 0 ;
byte b[] = new byte [1024 ];
do {
nread = in.read(b);
if (nread > 0 ) {
for (int i=0 ; i<nread; i++) {
cs = (cs + b[i]) % 65536 ;
}
}
} while (nread > 0 );
/*
* Verify that the checksums match
*/
String trailer = http.getHeaderField("Checksum" );
if (trailer == null ) {
throw new Exception("Checksum trailer missing from response" );
}
int rcvd_cs = Integer.parseInt(trailer);
if (rcvd_cs != cs) {
throw new Exception("Trailer checksum doesn't equal calculated checksum" );
}
http.disconnect();
}
public static void main(String args[]) throws Exception {
new ChunkedEncoding();
}
}
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