/*
* Copyright 2015 Odnoklassniki Ltd, Mail.Ru Group
*
* 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 one.nio.http;
import one.nio.util.ByteArrayBuilder;
import one.nio.util.URLEncoder;
import one.nio.util.Utf8;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Iterator;
import java.util.NoSuchElementException;
public class Request {
public static final int METHOD_GET = 1;
public static final int METHOD_POST = 2;
public static final int METHOD_HEAD = 3;
public static final int METHOD_OPTIONS = 4;
public static final byte[] VERB_GET = Utf8.toBytes("GET ");
public static final byte[] VERB_POST = Utf8.toBytes("POST ");
public static final byte[] VERB_HEAD = Utf8.toBytes("HEAD ");
public static final byte[] VERB_OPTIONS = Utf8.toBytes("OPTIONS ");
private static final byte[][] VERBS = {
new byte[0],
VERB_GET,
VERB_POST,
VERB_HEAD,
VERB_OPTIONS
};
private static final byte[] HTTP10_HEADER = Utf8.toBytes(" HTTP/1.0\r\n");
private static final byte[] HTTP11_HEADER = Utf8.toBytes(" HTTP/1.1\r\n");
private static final int PROTOCOL_HEADER_LENGTH = 13;
private static final Charset UTF8 = Charset.forName("UTF-8");
private int method;
private String uri;
private boolean http11;
private int params;
private int headerCount;
private String[] headers;
private byte[] body;
public Request(int method, String uri, boolean http11) {
this.method = method;
this.uri = uri;
this.http11 = http11;
this.params = uri.indexOf('?');
this.headerCount = 0;
this.headers = new String[16];
}
public Request(Request prototype) {
this.method = prototype.method;
this.uri = prototype.uri;
this.http11 = prototype.http11;
this.params = prototype.params;
this.headerCount = prototype.headerCount;
this.headers = prototype.headers.clone();
this.body = prototype.body;
}
public int getMethod() {
return method;
}
public String getURI() {
return uri;
}
public boolean isHttp11() {
return http11;
}
public String getPath() {
return params >= 0 ? uri.substring(0, params) : uri;
}
public String getQueryString() {
return params >= 0 ? URLEncoder.decode(uri.substring(params + 1)) : null;
}
public String getParameter(String key) {
int cur = params + 1;
while (cur > 0) {
int next = uri.indexOf('&', cur);
if (uri.startsWith(key, cur)) {
cur += key.length();
String rawValue = next > 0 ? uri.substring(cur, next) : uri.substring(cur);
return URLEncoder.decode(rawValue);
}
cur = next + 1;
}
return null;
}
public Iterator<String> getParameters(final String key) {
return new Iterator<String>() {
int cur = findNext(params + 1);
@Override
public boolean hasNext() {
return cur > 0;
}
@Override
public String next() {
int next = uri.indexOf('&', cur);
cur += key.length();
String rawValue = next > 0 ? uri.substring(cur, next) : uri.substring(cur);
cur = findNext(next + 1);
return URLEncoder.decode(rawValue);
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
private int findNext(int cur) {
while (cur > 0 && !uri.startsWith(key, cur)) {
cur = uri.indexOf('&', cur) + 1;
}
return cur;
}
};
}
public String getParameter(String key, String defaultValue) {
String value = getParameter(key);
return value != null ? value : defaultValue;
}
public String getRequiredParameter(String key) {
String value = getParameter(key);
if (value == null) {
throw new NoSuchElementException("Missing required parameter: " + key);
}
return value;
}
public int getHeaderCount() {
return headerCount;
}
public String[] getHeaders() {
return headers;
}
public String getHeader(String key) {
int keyLength = key.length();
for (int i = 0; i < headerCount; i++) {
if (headers[i].regionMatches(true, 0, key, 0, keyLength)) {
return headers[i].substring(keyLength);
}
}
return null;
}
public String getHeader(String key, String defaultValue) {
String value = getHeader(key);
return value != null ? value : defaultValue;
}
public String getRequiredHeader(String key) {
String value = getHeader(key);
if (value == null) {
throw new NoSuchElementException("Missing required header: " + key);
}
return value;
}
public void addHeader(String header) {
if (headerCount >= headers.length) {
headers = Arrays.copyOf(headers, headers.length + 8);
}
headers[headerCount++] = header;
}
public byte[] getBody() {
return body;
}
public void setBody(byte[] body) {
this.body = body;
}
public void setBodyUtf8(String body) {
this.body = body.getBytes(UTF8);
}
public byte[] toBytes() {
int estimatedSize = VERBS[method].length + Utf8.length(uri) + PROTOCOL_HEADER_LENGTH + headerCount * 2;
for (int i = 0; i < headerCount; i++) {
estimatedSize += headers[i].length();
}
if (body != null) {
estimatedSize += body.length;
}
ByteArrayBuilder builder = new ByteArrayBuilder(estimatedSize);
builder.append(VERBS[method]).append(uri).append(http11 ? HTTP11_HEADER : HTTP10_HEADER);
for (int i = 0; i < headerCount; i++) {
builder.append(headers[i]).append('\r').append('\n');
}
builder.append('\r').append('\n');
if (body != null) {
builder.append(body);
}
return builder.trim();
}
@Override
public String toString() {
return new String(toBytes(), UTF8);
}
}