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/*
* @(#)Request.java 1.10 07/01/02
*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package sun.net.httpserver;
import java.util.*;
import java.nio.*;
import java.net.*;
import java.io.*;
import java.nio.channels.*;
import com.sun.net.httpserver.*;
import com.sun.net.httpserver.spi.*;
/**
*/
class Request {
final static int BUF_LEN = 2048;
final static byte CR = 13;
final static byte LF = 10;
private String startLine;
private SocketChannel chan;
private InputStream is;
private OutputStream os;
Request (InputStream rawInputStream, OutputStream rawout) throws IOException {
this.chan = chan;
is = rawInputStream;
os = rawout;
do {
startLine = readLine();
/* skip blank lines */
} while (startLine.equals (""));
}
char[] buf = new char [BUF_LEN];
int pos;
StringBuffer lineBuf;
public InputStream inputStream () {
return is;
}
public OutputStream outputStream () {
return os;
}
/**
* read a line from the stream returning as a String.
* Not used for reading headers.
*/
public String readLine () throws IOException {
boolean gotCR = false, gotLF = false;
pos = 0; lineBuf = new StringBuffer();
while (!gotLF) {
int c = is.read();
if (c == -1) {
return null;
}
if (gotCR) {
if (c == LF) {
gotLF = true;
} else {
gotCR = false;
consume (CR);
consume (c);
}
} else {
if (c == CR) {
gotCR = true;
} else {
consume (c);
}
}
}
lineBuf.append (buf, 0, pos);
return new String (lineBuf);
}
private void consume (int c) {
if (pos == BUF_LEN) {
lineBuf.append (buf);
pos = 0;
}
buf[pos++] = (char)c;
}
/**
* returns the request line (first line of a request)
*/
public String requestLine () {
return startLine;
}
Headers hdrs = null;
Headers headers () throws IOException {
if (hdrs != null) {
return hdrs;
}
hdrs = new Headers();
char s[] = new char[10];
int firstc = is.read();
while (firstc != LF && firstc != CR && firstc >= 0) {
int len = 0;
int keyend = -1;
int c;
boolean inKey = firstc > ' ';
s[len++] = (char) firstc;
parseloop:{
while ((c = is.read()) >= 0) {
switch (c) {
case ':':
if (inKey && len > 0)
keyend = len;
inKey = false;
break;
case '\t':
c = ' ';
case ' ':
inKey = false;
break;
case CR:
case LF:
firstc = is.read();
if (c == CR && firstc == LF) {
firstc = is.read();
if (firstc == CR)
firstc = is.read();
}
if (firstc == LF || firstc == CR || firstc > ' ')
break parseloop;
/* continuation */
c = ' ';
break;
}
if (len >= s.length) {
char ns[] = new char[s.length * 2];
System.arraycopy(s, 0, ns, 0, len);
s = ns;
}
s[len++] = (char) c;
}
firstc = -1;
}
while (len > 0 && s[len - 1] <= ' ')
len--;
String k;
if (keyend <= 0) {
k = null;
keyend = 0;
} else {
k = String.copyValueOf(s, 0, keyend);
if (keyend < len && s[keyend] == ':')
keyend++;
while (keyend < len && s[keyend] <= ' ')
keyend++;
}
String v;
if (keyend >= len)
v = new String();
else
v = String.copyValueOf(s, keyend, len - keyend);
hdrs.add (k,v);
}
return hdrs;
}
/**
* Implements blocking reading semantics on top of a non-blocking channel
*/
static class ReadStream extends InputStream {
SocketChannel channel;
SelectorCache sc;
Selector selector;
ByteBuffer chanbuf;
SelectionKey key;
int available;
byte[] one;
boolean closed = false, eof = false;
ByteBuffer markBuf; /* reads may be satisifed from this buffer */
boolean marked;
boolean reset;
int readlimit;
static long readTimeout;
ServerImpl server;
static {
readTimeout = ServerConfig.getReadTimeout();
}
public ReadStream (ServerImpl server, SocketChannel chan) throws IOException {
this.channel = chan;
this.server = server;
sc = SelectorCache.getSelectorCache();
selector = sc.getSelector();
chanbuf = ByteBuffer.allocate (8* 1024);
key = chan.register (selector, SelectionKey.OP_READ);
available = 0;
one = new byte[1];
closed = marked = reset = false;
}
public synchronized int read (byte[] b) throws IOException {
return read (b, 0, b.length);
}
public synchronized int read () throws IOException {
int result = read (one, 0, 1);
if (result == 1) {
return one[0] & 0xFF;
} else {
return -1;
}
}
public synchronized int read (byte[] b, int off, int srclen) throws IOException {
int canreturn, willreturn;
if (closed)
throw new IOException ("Stream closed");
if (eof) {
return -1;
}
if (reset) { /* satisfy from markBuf */
canreturn = markBuf.remaining ();
willreturn = canreturn>srclen ? srclen : canreturn;
markBuf.get(b, off, willreturn);
if (canreturn == willreturn) {
reset = false;
}
} else { /* satisfy from channel */
canreturn = available();
while (canreturn == 0 && !eof) {
block ();
canreturn = available();
}
if (eof) {
return -1;
}
willreturn = canreturn>srclen ? srclen : canreturn;
chanbuf.get(b, off, willreturn);
available -= willreturn;
if (marked) { /* copy into markBuf */
try {
markBuf.put (b, off, willreturn);
} catch (BufferOverflowException e) {
marked = false;
}
}
}
return willreturn;
}
public synchronized int available () throws IOException {
if (closed)
throw new IOException ("Stream is closed");
if (eof)
return -1;
if (reset)
return markBuf.remaining();
if (available > 0)
return available;
chanbuf.clear ();
available = channel.read (chanbuf);
if (available > 0) {
chanbuf.flip();
} else if (available == -1) {
eof = true;
available = 0;
}
return available;
}
/**
* block() only called when available==0 and buf is empty
*/
private synchronized void block () throws IOException {
long currtime = server.getTime();
long maxtime = currtime + readTimeout;
while (currtime < maxtime) {
if (selector.select (readTimeout) == 1) {
selector.selectedKeys().clear();
available ();
return;
}
currtime = server.getTime();
}
throw new SocketTimeoutException ("no data received");
}
public void close () throws IOException {
if (closed) {
return;
}
channel.close ();
selector.selectNow();
sc.freeSelector(selector);
closed = true;
}
public synchronized void mark (int readlimit) {
if (closed)
return;
this.readlimit = readlimit;
markBuf = ByteBuffer.allocate (readlimit);
marked = true;
reset = false;
}
public synchronized void reset () throws IOException {
if (closed )
return;
if (!marked)
throw new IOException ("Stream not marked");
marked = false;
reset = true;
markBuf.flip ();
}
}
static class WriteStream extends java.io.OutputStream {
SocketChannel channel;
ByteBuffer buf;
SelectionKey key;
SelectorCache sc;
Selector selector;
boolean closed;
byte[] one;
ServerImpl server;
static long writeTimeout;
static {
writeTimeout = ServerConfig.getWriteTimeout();
}
public WriteStream (ServerImpl server, SocketChannel channel) throws IOException {
this.channel = channel;
this.server = server;
sc = SelectorCache.getSelectorCache();
selector = sc.getSelector();
key = channel.register (selector, SelectionKey.OP_WRITE);
closed = false;
one = new byte [1];
buf = ByteBuffer.allocate (4096);
}
public synchronized void write (int b) throws IOException {
one[0] = (byte)b;
write (one, 0, 1);
}
public synchronized void write (byte[] b) throws IOException {
write (b, 0, b.length);
}
public synchronized void write (byte[] b, int off, int len) throws IOException {
int l = len;
if (closed)
throw new IOException ("stream is closed");
int cap = buf.capacity();
if (cap < len) {
int diff = len - cap;
buf = ByteBuffer.allocate (2*(cap+diff));
}
buf.clear();
buf.put (b, off, len);
buf.flip ();
int n;
while ((n = channel.write (buf)) < l) {
l -= n;
if (l == 0)
return;
block();
}
}
void block () throws IOException {
long currtime = server.getTime();
long maxtime = currtime + writeTimeout;
while (currtime < maxtime) {
if (selector.select (writeTimeout) == 1) {
selector.selectedKeys().clear ();
return;
}
currtime = server.getTime();
}
throw new SocketTimeoutException ("write blocked too long");
}
public void close () throws IOException {
if (closed)
return;
channel.close ();
selector.selectNow();
sc.freeSelector(selector);
closed = true;
}
}
}
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