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Request.java
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/*
* Copyright (c) 2005, 2023, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package robaho.net.httpserver;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import com.sun.net.httpserver.Headers;
/**
*/
class Request {
static final char CR = 13;
static final char LF = 10;
private final InputStream is;
private final OutputStream os;
private final String requestLine;
Request(InputStream rawInputStream, OutputStream rawout) throws IOException {
is = rawInputStream;
os = rawout;
requestLine = readRequestLine();
}
public InputStream inputStream() {
return is;
}
public OutputStream outputStream() {
return os;
}
static class PushbackStream {
private final InputStream is;
private int pushback = -1;
private boolean eof=false;
public PushbackStream(InputStream is) {
this.is = is;
}
public int read() throws IOException {
if(pushback!=-1) {
try {
return pushback;
} finally {
pushback=-1;
}
}
if(eof) return -1;
return is.read();
}
public void skipWhitespace() throws IOException {
int c;
for(c=read();c==' ' || c=='\t';c=read()){}
if(c==-1) eof=true; else pushback=c;
}
}
/**
* read a line from the stream returning as a String.
* Not used for reading headers.
*/
private boolean readLine(BufferedBuilder lineBuf) throws IOException {
boolean gotCR = false;
while (true) {
int c;
try {
c = is.read();
} catch(IOException e) {
if(lineBuf.isEmpty()) return false;
throw e;
}
if (c == -1) {
lineBuf.count=0;
return false;
}
if (gotCR) {
if (c == LF) {
return true;
} else {
gotCR = false;
lineBuf.append(CR);
lineBuf.append((char)c);
}
} else {
if (c == CR) {
gotCR = true;
} else {
lineBuf.append((char)c);
}
}
}
}
/**
* read the request line into the buffer
*/
private String readRequestLine() throws IOException {
final BufferedBuilder bb = new BufferedBuilder(64);
while(readLine(bb)) {
if(!bb.isEmpty()) break;
}
return bb.trimmed();
}
/** return trimmed value from StringBuilder and reset to empty */
private static String trimmed(BufferedBuilder bb) {
return bb.trimmed();
}
/**
* @returns the request line or the empty string if not found
*/
public String requestLine() {
return requestLine;
}
Headers hdrs = null;
private static final class BufferedBuilder {
private byte[] buffer;
private int capacity;
private int count;
BufferedBuilder(int capacity) {
buffer = new byte[capacity];
this.capacity=capacity;
}
boolean isEmpty() {
return count==0;
}
void append(char c) {
if(count==capacity) {
capacity *= 2;
buffer = Arrays.copyOf(buffer, capacity);
}
buffer[count++]=(byte)c;
}
public String trimmed() {
int start=0;
while(start<count && buffer[start]==' ') start++;
int end=count;
while(end>0 && buffer[end-1]==' ') end--;
count=0;
return new String(buffer,start,end-start,StandardCharsets.ISO_8859_1);
}
}
@SuppressWarnings("fallthrough")
Headers headers() throws IOException {
if (hdrs != null) {
return hdrs;
}
hdrs = new Headers();
BufferedBuilder key = new BufferedBuilder(32);
BufferedBuilder value = new BufferedBuilder(128);
PushbackStream pbs = new PushbackStream(is);
BufferedBuilder current = key;
boolean prevCR = false;
boolean sol = true;
int c;
while((c=pbs.read())!=-1) {
if(c==CR) { prevCR = true; }
else if(c==LF && prevCR) {
if(key.isEmpty() && value.isEmpty()) break;
if(sol) {
hdrs.add(trimmed(key),trimmed(value));
break;
}
prevCR=false;
sol=true;
} else {
if(sol && (c==' ' || c=='\t')) {
pbs.skipWhitespace();
current=value;
sol=false;
} else {
if(sol) {
if(!key.isEmpty() || !value.isEmpty()) {
hdrs.add(trimmed(key),trimmed(value));
}
current=key;
sol=false;
}
if(c==':' && current==key) {
current=value;
pbs.skipWhitespace();
} else {
current.append((char)c);
}
}
}
}
return hdrs;
}
}