org.xnio.http.HttpUpgradeParser Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source
*
* Copyright 2013 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.xnio.http;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
/**
* @author Stuart Douglas
*/
class HttpUpgradeParser {
private static final int VERSION = 0;
private static final int STATUS_CODE = 1;
private static final int MESSAGE = 2;
private static final int HEADER_NAME = 3;
private static final int HEADER_VALUE = 4;
private static final int COMPLETE = 5;
private int parseState = 0;
private String httpVersion;
private int responseCode;
private String message;
private final Map> headers = new HashMap>();
private final StringBuilder current = new StringBuilder();
private String headerName;
void parse(final ByteBuffer buffer) throws IOException {
while (buffer.hasRemaining() && !isComplete()) {
switch (parseState) {
case VERSION:
parseVersion(buffer);
break;
case STATUS_CODE:
parseStatusCode(buffer);
break;
case MESSAGE:
parseMessage(buffer);
break;
case HEADER_NAME:
parseHeaderName(buffer);
break;
case HEADER_VALUE:
parseHeaderValue(buffer);
break;
case COMPLETE:
return;
}
}
}
private void parseHeaderValue(final ByteBuffer buffer) {
while (buffer.hasRemaining()) {
byte b = buffer.get();
if (b == '\r' || b == '\n') {
String key = headerName.toLowerCase(Locale.ENGLISH);
List list = headers.get(key);
if(list == null) {
headers.put(key, list = new ArrayList());
}
list.add(current.toString().trim());
parseState--;
current.setLength(0);
return;
} else {
current.append((char) b);
}
}
}
private void parseHeaderName(final ByteBuffer buffer) throws IOException {
while (buffer.hasRemaining()) {
byte b = buffer.get();
if (b == '\r' || b == '\n') {
if (current.length() > 2) {
throw new IOException("Invalid response");
} else if (current.length() == 2) {
//the first /r was consumed by the previous line
if (current.charAt(0) == '\n' &&
current.charAt(1) == '\r'
&& b == '\n') {
parseState = COMPLETE;
return;
}
throw new IOException("Invalid response");
}
current.append((char) b);
} else if (b == ':') {
headerName = current.toString().trim();
parseState++;
current.setLength(0);
return;
} else {
current.append((char) b);
}
}
}
private void parseMessage(final ByteBuffer buffer) throws IOException {
while (buffer.hasRemaining()) {
byte b = buffer.get();
if (b == '\r' || b == '\n') {
message = current.toString().trim();
parseState++;
current.setLength(0);
return;
} else {
current.append((char) b);
}
}
}
private void parseStatusCode(final ByteBuffer buffer) throws IOException {
while (buffer.hasRemaining()) {
byte b = buffer.get();
if (b == '\r' || b == '\n') {
throw new IOException("Invalid response");
} else if (b == ' ' || b == '\t') {
responseCode = Integer.parseInt(current.toString().trim());
parseState++;
current.setLength(0);
return;
} else {
current.append((char) b);
}
}
}
private void parseVersion(final ByteBuffer buffer) throws IOException {
while (buffer.hasRemaining()) {
byte b = buffer.get();
if (b == '\r' || b == '\n') {
throw new IOException("Invalid response");
} else if (b == ' ' || b == '\t') {
httpVersion = current.toString().trim();
parseState++;
current.setLength(0);
return;
} else {
current.append((char) b);
}
}
}
boolean isComplete() {
return parseState == COMPLETE;
}
public String getHttpVersion() {
return httpVersion;
}
public int getResponseCode() {
return responseCode;
}
public String getMessage() {
return message;
}
public Map> getHeaders() {
return headers;
}
}