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A set of utilities for Java
package org.rx.net.http;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.*;
import io.netty.handler.codec.http.*;
import io.netty.handler.codec.http.multipart.*;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.util.SelfSignedCertificate;
import io.netty.handler.stream.ChunkedWriteHandler;
import io.netty.util.CharsetUtil;
import lombok.Getter;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.rx.bean.MultiValueMap;
import org.rx.core.Arrays;
import org.rx.core.Disposable;
import org.rx.core.Extends;
import org.rx.core.Strings;
import org.rx.io.Bytes;
import org.rx.net.Sockets;
import java.net.InetSocketAddress;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static io.netty.handler.codec.http.HttpResponseStatus.*;
import static org.rx.core.Extends.ifNull;
@Slf4j
public class HttpServer extends Disposable {
class ServerHandler extends SimpleChannelInboundHandler {
HttpRequest request;
HttpPostRequestDecoder decoder;
Handler handler;
ServerRequest req;
@Override
protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception {
if (msg instanceof HttpRequest) {
request = (HttpRequest) msg;
if (!request.decoderResult().isSuccess()) {
sendError(ctx, BAD_REQUEST);
return;
}
QueryStringDecoder queryStringDecoder = new QueryStringDecoder(request.uri());
handler = mapping.get(queryStringDecoder.path());
if (handler == null) {
sendError(ctx, NOT_FOUND);
return;
}
HttpMethod[] method = handler.method();
if (method != null && !Arrays.contains(method, request.method())) {
sendError(ctx, METHOD_NOT_ALLOWED);
return;
}
req = new ServerRequest((InetSocketAddress) ctx.channel().remoteAddress(), request.uri(), request.method());
req.getHeaders().setAll(request.headers());
Map> params = queryStringDecoder.parameters();
if (!params.isEmpty()) {
for (Map.Entry> p : params.entrySet()) {
for (String val : p.getValue()) {
req.getQueryString().put(p.getKey(), val);
}
}
}
if (Strings.startsWith(req.getContentType(), HttpHeaderValues.MULTIPART_FORM_DATA.toString())
|| Strings.startsWith(req.getContentType(), HttpHeaderValues.APPLICATION_X_WWW_FORM_URLENCODED.toString())) {
try {
decoder = new HttpPostRequestDecoder(factory, request);
} catch (HttpPostRequestDecoder.ErrorDataDecoderException e) {
log.error("post decode", e);
sendError(ctx, BAD_REQUEST);
return;
}
}
}
if (msg instanceof HttpContent) {
if (req == null) {
return;
}
HttpContent content = (HttpContent) msg;
if (decoder != null) {
try {
decoder.offer(content);
} catch (HttpPostRequestDecoder.ErrorDataDecoderException e) {
log.error("post decode", e);
sendError(ctx, BAD_REQUEST);
return;
}
try {
while (decoder.hasNext()) {
InterfaceHttpData httpData = decoder.next();
if (httpData != null) {
if (httpData.getHttpDataType().equals(InterfaceHttpData.HttpDataType.Attribute)) {
Attribute attr = (Attribute) httpData;
MultiValueMap form = req.getForm();
if (form == null) {
req.setForm(form = new MultiValueMap<>());
}
form.put(attr.getName(), attr.getValue());
} else if (httpData.getHttpDataType().equals(InterfaceHttpData.HttpDataType.FileUpload)) {
FileUpload file = (FileUpload) httpData;
MultiValueMap files = req.getFiles();
if (files == null) {
req.setFiles(files = new MultiValueMap<>());
}
files.put(file.getName(), file);
}
}
}
} catch (HttpPostRequestDecoder.EndOfDataDecoderException e) {
log.debug("EndOfData", e);
}
} else {
ByteBuf buf = req.getContent();
if (buf == null) {
req.setContent(buf = Bytes.directBuffer());
}
buf.writeBytes(content.content());
}
if (msg instanceof LastHttpContent) {
// LastHttpContent trailer = (LastHttpContent) msg;
// if (!trailer.decoderResult().isSuccess()) {
// sendError(ctx, BAD_REQUEST);
// return;
// }
ServerResponse res = new ServerResponse();
try {
handler.handle(req, res);
//redirect
if (res.getHeaders().contains(HttpHeaderNames.LOCATION)) {
FullHttpResponse response = new DefaultFullHttpResponse(request.protocolVersion(), FOUND, Unpooled.EMPTY_BUFFER);
sendResponse(ctx, response);
return;
}
} catch (Throwable e) {
log.error("handle", e);
sendError(ctx, INTERNAL_SERVER_ERROR);
return;
}
DefaultFullHttpResponse response = new DefaultFullHttpResponse(request.protocolVersion(), OK, ifNull(res.getContent(), Unpooled.EMPTY_BUFFER));
response.headers().setAll(res.getHeaders());
sendResponse(ctx, response);
}
}
}
private void sendError(ChannelHandlerContext ctx, HttpResponseStatus status) {
FullHttpResponse response = new DefaultFullHttpResponse(request.protocolVersion(), status,
Unpooled.copiedBuffer("Failure: " + status, CharsetUtil.UTF_8));
response.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/plain; charset=UTF-8");
sendResponse(ctx, response);
}
private void sendResponse(ChannelHandlerContext ctx, FullHttpResponse response) {
boolean keepAlive = HttpUtil.isKeepAlive(request);
HttpUtil.setContentLength(response, response.content().readableBytes());
if (keepAlive) {
response.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE);
} else {
response.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.CLOSE);
}
ChannelFuture future = ctx.writeAndFlush(response);
if (!keepAlive) {
future.addListener(ChannelFutureListener.CLOSE);
}
if (decoder != null) {
decoder.destroy();
decoder = null;
}
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
if (decoder != null) {
decoder.cleanFiles();
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
log.error("caught", cause);
if (ctx.channel().isActive()) {
sendError(ctx, INTERNAL_SERVER_ERROR);
}
}
}
public interface Handler {
default HttpMethod[] method() {
return null;
}
void handle(ServerRequest request, ServerResponse response) throws Throwable;
}
private static final HttpDataFactory factory = new DefaultHttpDataFactory(DefaultHttpDataFactory.MINSIZE); // Disk if size exceed
public static String normalize(String uri) {
// "/" => "/"
// "" => "/"
// "/a/b/" => "/a/b"
// "a/b/" => "/a/b"
uri = uri.trim();
// 删除后缀的/
while (uri.endsWith("/")) {
uri = uri.substring(0, uri.length() - 1);
}
// 删除前缀的/
while (uri.startsWith("/")) {
uri = uri.substring(1);
}
// 前缀补充/
if (!uri.startsWith("/")) {
uri = "/" + uri;
}
return uri;
}
final ServerBootstrap serverBootstrap;
@Getter
final Map mapping = new ConcurrentHashMap<>();
@SneakyThrows
public HttpServer(int port, boolean ssl) {
final SslContext sslCtx;
if (ssl) {
SelfSignedCertificate ssc = new SelfSignedCertificate();
sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey()).build();
} else {
sslCtx = null;
}
serverBootstrap = Sockets.serverBootstrap(ch -> {
ChannelPipeline p = ch.pipeline();
if (sslCtx != null) {
p.addLast(sslCtx.newHandler(ch.alloc()));
}
p.addLast(new HttpServerCodec(),
new HttpServerExpectContinueHandler(),
new HttpContentCompressor(),
new ChunkedWriteHandler(),
new ServerHandler());
});
serverBootstrap.bind(port).addListener(Sockets.logBind(port));
}
@Override
protected void freeObjects() {
Sockets.closeBootstrap(serverBootstrap);
}
public HttpServer requestMapping(String path, Handler handler) {
mapping.put(normalize(path), handler);
return this;
}
}