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Netty example

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This commit is contained in:
Alex Tkachman
2012-02-06 16:32:04 +02:00
parent 964b66ecb1
commit 9d69c62a6c
13 changed files with 1295 additions and 141 deletions
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examples/src/netty/netty.kt
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import java.util.concurrent.Executors
import java.net.InetSocketAddress
import java.net.URLDecoder
import java.io.*
import org.jboss.netty.bootstrap.ServerBootstrap
import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory
import org.jboss.netty.channel.*
import org.jboss.netty.handler.codec.http.*
import org.jboss.netty.handler.stream.ChunkedWriteHandler
import org.jboss.netty.handler.codec.frame.TooLongFrameException
import org.jboss.netty.buffer.ChannelBuffers
import org.jboss.netty.util.CharsetUtil
import org.jboss.netty.handler.codec.http.HttpResponseStatus.*
import netty.*
import jlstring.*
package jlstring {
fun String.replace(c: Char, by: Char) : String = (this as java.lang.String).replace(c, by) as String
fun String.contains(s: String) : Boolean = (this as java.lang.String).contains(s as java.lang.CharSequence)
fun java.lang.String.plus(s: Any?) : String = (this as String) + s.toString()
}
package netty {
fun ChannelPipeline.with(op: fun ChannelPipeline.() ) : ChannelPipeline {
this.op()
return this
}
fun HttpResponse.set(header: String, value: Any?) : Unit {
setHeader(header, value)
}
fun HttpResponse.setContent(content: Any?) : Unit {
setContent(ChannelBuffers.copiedBuffer(content.toString() as java.lang.String, CharsetUtil.UTF_8))
}
fun ChannelHandlerContext.sendError(status: HttpResponseStatus?) {
val response = DefaultHttpResponse(HttpVersion.HTTP_1_1, status)
response["Content-Type"] = "text/plain; charset=UTF-8"
response.setContent("Failure: " + status.toString() + "\r\n")
// Close the connection as soon as the error message is sent.
this.getChannel()?.write(response)?.addListener(ChannelFutureListener.CLOSE)
}
fun String.decodeURI(encoding : String) : String? {
try {
return URLDecoder.decode(this, encoding)
}
catch (e : UnsupportedEncodingException) {
return null
}
}
fun String.sanitizeUri() : String? {
val path = decodeURI("UTF-8") ?: decodeURI("ISO-8859-1")
if (path == null)
throw Error()
val localizedPath : String = path.replace('/', File.separatorChar)
return if (localizedPath.contains(File.separator + ".") ||
localizedPath.contains("." + File.separator) ||
localizedPath.startsWith(".") || endsWith("."))
null
else
localizedPath
}
class StandardPipelineFactory(val config: fun ChannelPipeline.():Unit) : ChannelPipelineFactory {
override fun getPipeline() : ChannelPipeline {
val pipeline = DefaultChannelPipeline().with {
addLast("decoder", HttpRequestDecoder())
addLast("aggregator", HttpChunkAggregator(65536))
addLast("encoder", HttpResponseEncoder())
addLast("chunkedWriter", ChunkedWriteHandler())
}
pipeline.config () // can not move it inside with{} because of codegen bug
return pipeline
}
}
fun ServerBootstrap.configPipeline(config: fun ChannelPipeline.(): Unit) =
setPipelineFactory(
StandardPipelineFactory(config)
)
}
fun main(args : Array<String>) {
val bootstrap = ServerBootstrap(
NioServerSocketChannelFactory(
Executors.newCachedThreadPool(),
Executors.newCachedThreadPool()
)
)
bootstrap.configPipeline {
addLast("handler", HttpStaticFileServerHandler(args[0]))
}
bootstrap.bind(InetSocketAddress(8080))
}
class HttpStaticFileServerHandler(val rootDir: String) : SimpleChannelUpstreamHandler() {
fun messageReceived(ctx : ChannelHandlerContext, e : MessageEvent) {
val request = e.getMessage() as HttpRequest
if (request.getMethod() != HttpMethod.GET) {
ctx.sendError(METHOD_NOT_ALLOWED);
return;
}
val path = request.getUri()?.sanitizeUri()
if (path == null) {
ctx.sendError(FORBIDDEN);
return;
}
val file = File(rootDir + File.separator + path)
if (file.isHidden() || !file.exists()) {
ctx.sendError(NOT_FOUND)
return
}
if (!file.isFile()) {
ctx.sendError(FORBIDDEN)
return
}
var raf = RandomAccessFile(file, "r")
val fileLength = raf.length()
val response = DefaultHttpResponse(HttpVersion.HTTP_1_1, OK)
response["Content-Length"] = fileLength
val ch = e.getChannel()
ch?.write(response)
ch?.write(DefaultFileRegion(raf.getChannel(), 0, fileLength))
}
}
examples/src/nettyserver/lib/netty-3.2.5.Final-sources.jar
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examples/src/nettyserver/lib/netty-3.2.5.Final.jar
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examples/src/nettyserver/nettyserver.iml
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examples/src/nettyserver/nettyserver.ipr
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examples/src/nettyserver/nettyserver.iws
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<state line="36" column="0" selection-start="1181" selection-end="1181" vertical-scroll-proportion="0.0">
<folding />
</state>
</provider>
</entry>
<entry file="file://$PROJECT_DIR$/src/StaticFileProcessor.kt">
<provider selected="true" editor-type-id="text-editor">
<state line="3" column="0" selection-start="98" selection-end="98" vertical-scroll-proportion="0.06838906">
<folding />
</state>
</provider>
</entry>
</component>
<component name="masterDetails">
<states>
<state key="ArtifactsStructureConfigurable.UI">
<settings>
<artifact-editor />
<splitter-proportions>
<option name="proportions">
<list>
<option value="0.2" />
</list>
</option>
</splitter-proportions>
</settings>
</state>
<state key="FacetStructureConfigurable.UI">
<settings>
<last-edited>No facets are configured</last-edited>
<splitter-proportions>
<option name="proportions">
<list>
<option value="0.2" />
</list>
</option>
</splitter-proportions>
</settings>
</state>
<state key="GlobalLibrariesConfigurable.UI">
<settings>
<splitter-proportions>
<option name="proportions">
<list>
<option value="0.2" />
</list>
</option>
</splitter-proportions>
</settings>
</state>
<state key="JdkListConfigurable.UI">
<settings>
<last-edited>1.6</last-edited>
<splitter-proportions>
<option name="proportions">
<list>
<option value="0.2" />
</list>
</option>
</splitter-proportions>
</settings>
</state>
<state key="ModuleStructureConfigurable.UI">
<settings>
<last-edited>nettyserver</last-edited>
<splitter-proportions>
<option name="proportions">
<list>
<option value="0.2" />
</list>
</option>
</splitter-proportions>
</settings>
</state>
<state key="ProjectJDKs.UI">
<settings>
<last-edited>1.6</last-edited>
<splitter-proportions>
<option name="proportions">
<list>
<option value="0.2" />
</list>
</option>
</splitter-proportions>
</settings>
</state>
<state key="ProjectLibrariesConfigurable.UI">
<settings>
<last-edited>KotlinRuntime</last-edited>
<splitter-proportions>
<option name="proportions">
<list>
<option value="0.2" />
</list>
</option>
</splitter-proportions>
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</state>
</states>
</component>
</project>
examples/src/nettyserver/src/HttpHandler.kt
+41
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package org.jetbrains.kotlin.examples.netty
import org.jboss.netty.channel.SimpleChannelUpstreamHandler
import java.util.LinkedList
import org.jboss.netty.channel.ChannelHandlerContext
import org.jboss.netty.channel.MessageEvent
import org.jboss.netty.handler.codec.http.HttpResponseStatus.*
import org.jboss.netty.handler.codec.http.HttpMethod
import org.jboss.netty.handler.codec.http.HttpResponseStatus
class HttpHandler(config: HttpHandler.() -> Unit) : SimpleChannelUpstreamHandler() {
private var processors = LinkedList<Processor>();
var onNotFound : (RequestResponse)->Any? = { request -> request.setError(NOT_FOUND) };
{
this.bind(config)()
}
fun messageReceived(ctx : ChannelHandlerContext, e : MessageEvent) {
val request = RequestResponse(e)
for(processor in processors) {
if(processor.tryToProcess(request)) {
request.write()
return
}
}
(onNotFound)(request)
}
fun static(prefix: String = "/", directory: String) {
processors.add(StaticFileProcessor(prefix, directory))
}
fun rest(prefix: String, config: RestBuilder.()->Any?) {
val builder = RestBuilder()
(builder.bind(config))()
processors.add(RestProcessor(prefix, builder))
}
}
examples/src/nettyserver/src/Main.kt
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package org.jetbrains.kotlin.examples.netty
import org.jboss.netty.handler.codec.http.HttpResponseStatus
import org.jboss.netty.handler.codec.http.DefaultHttpResponse
import org.jboss.netty.handler.codec.http.HttpVersion
import org.jboss.netty.buffer.ChannelBuffers
import java.nio.charset.Charset
fun main(args : Array<String>) {
if(args.size == 0) {
println("Please provide command line argument <path to static resources>")
System.exit(1)
}
else {
println("Please open http://localhost:8080/index.html page in your browser")
}
httpServer(8080) {
static(directory = args[0])
rest("/sayhello") {
GET {
response.content = "Hello, World!"
}
POST {
response.content = "You said: ${request.getContent().sure().toString(Charset.defaultCharset())}"
}
}
onNotFound = { requestResponse ->
when(requestResponse.path) {
"/prototype.js" -> {
requestResponse.redirect("https://ajax.googleapis.com/ajax/libs/prototype/1.7.0.0/prototype.js")
}
else ->
requestResponse.setError(HttpResponseStatus.FORBIDDEN)
}
}
}
}
examples/src/nettyserver/src/Netty.kt
+66
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@@ -0,0 +1,66 @@
package org.jetbrains.kotlin.examples.netty
import java.util.concurrent.Executors
import java.net.*
import java.io.*
import org.jboss.netty.bootstrap.ServerBootstrap
import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory
import org.jboss.netty.channel.*
import org.jboss.netty.handler.codec.http.*
import org.jboss.netty.handler.stream.ChunkedWriteHandler
import org.jboss.netty.handler.codec.frame.TooLongFrameException
import org.jboss.netty.buffer.ChannelBuffers
import org.jboss.netty.util.CharsetUtil
import org.jboss.netty.handler.codec.http.HttpResponseStatus.*
import org.jboss.netty.bootstrap.ServerBootstrap
import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory
import org.jboss.netty.channel.*
import org.jboss.netty.handler.codec.http.*
import org.jboss.netty.handler.stream.ChunkedWriteHandler
import org.jboss.netty.handler.codec.frame.TooLongFrameException
import org.jboss.netty.buffer.ChannelBuffers
import org.jboss.netty.util.CharsetUtil
import org.jboss.netty.handler.codec.http.HttpResponseStatus.*
import java.util.LinkedList
// This is workaround for compiler bug
fun <T> T.bind(op: T.()->Any?) = { op() }
fun HttpResponse.set(header: String, value: Any?) : Unit {
setHeader(header, value)
}
var HttpResponse.content : Any?
get() = throw UnsupportedOperationException()
set(c: Any?) {
val buffer = ChannelBuffers.copiedBuffer(c.toString(), CharsetUtil.UTF_8).sure()
setContent(buffer)
setHeader("Content-Length", buffer.readableBytes())
}
fun ServerBootstrap.configPipeline(config: ChannelPipeline.() -> Unit) = setPipelineFactory(object: ChannelPipelineFactory {
override fun getPipeline() : ChannelPipeline {
val pipeline = DefaultChannelPipeline()
pipeline.bind(config) ()
return pipeline
}
})
fun httpServer(port: Int, handler: HttpHandler.() -> Unit) {
val bootstrap = ServerBootstrap(
NioServerSocketChannelFactory(
Executors.newCachedThreadPool(),
Executors.newCachedThreadPool()
)
)
bootstrap.configPipeline {
addLast("decoder", HttpRequestDecoder())
addLast("aggregator", HttpChunkAggregator(65536))
addLast("encoder", HttpResponseEncoder())
addLast("chunkedWriter", ChunkedWriteHandler())
addLast("handler", HttpHandler(handler))
}
bootstrap.bind(InetSocketAddress(port))
}
examples/src/nettyserver/src/Request.kt
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package org.jetbrains.kotlin.examples.netty
import org.jboss.netty.channel.SimpleChannelUpstreamHandler
import java.util.LinkedList
import org.jboss.netty.channel.ChannelHandlerContext
import org.jboss.netty.channel.MessageEvent
import org.jboss.netty.handler.codec.http.HttpResponseStatus.*
import org.jboss.netty.handler.codec.http.HttpRequest
import org.jboss.netty.channel.Channel
import org.jboss.netty.handler.codec.http.HttpResponseStatus
import org.jboss.netty.handler.codec.http.DefaultHttpResponse
import org.jboss.netty.channel.ChannelFutureListener
import org.jboss.netty.handler.codec.http.HttpVersion
import java.io.File
import java.io.UnsupportedEncodingException
import java.net.URLDecoder
import org.jboss.netty.handler.codec.http.HttpHeaders.*
import org.jboss.netty.handler.codec.http.HttpMessage
import org.jboss.netty.channel.ChannelFuture
class RequestResponse(e: MessageEvent) {
val request = e.getMessage() as HttpRequest
val response = DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.FORBIDDEN)
val channel = e.getChannel().sure()
val path = request.getUri().sure().sanitizeUri()
fun setError(status: HttpResponseStatus?) {
response.setStatus(status)
response["Content-Type"] = "text/plain; charset=UTF-8"
response.content = "Failure: " + status.toString() + "\r\n"
}
fun redirect(path: String) {
response.setStatus(HttpResponseStatus.MOVED_PERMANENTLY)
response["Location"] = path
response["Content-Length"] = 0
channel.write(response)
}
fun ok() : RequestResponse {
response.setStatus(HttpResponseStatus.OK)
return this
}
fun write() =
if(response.getStatus().sure().getCode() >= 400) {
channel.write(response).sure().addListener(ChannelFutureListener.CLOSE)
}
else {
channel.write(response)
}
}
fun String.sanitizeUri() : String {
val path = decodeURI("UTF-8") ?: decodeURI("ISO-8859-1") ?: throw Error()
val localizedPath = path.replace('/', File.separatorChar)
return if (localizedPath.contains(File.separator + ".") ||
localizedPath.contains("." + File.separator) ||
localizedPath.startsWith(".") || localizedPath.endsWith("."))
throw Error()
else
localizedPath
}
fun String.decodeURI(encoding : String) : String? {
try {
return URLDecoder.decode(this, encoding)
}
catch (e : UnsupportedEncodingException) {
return null
}
}
trait Processor {
fun tryToProcess(request: RequestResponse) : Boolean
}
examples/src/nettyserver/src/RestProcessor.kt
+37
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@@ -0,0 +1,37 @@
package org.jetbrains.kotlin.examples.netty
import org.jboss.netty.handler.codec.http.HttpMethod
import org.jboss.netty.handler.codec.http.HttpResponseStatus
class RestBuilder() {
var onGet : (RequestResponse.()->Any?)? = null
var onPost : (RequestResponse.()->Any?)? = null
fun GET(handler: RequestResponse.()->Unit) {
onGet = handler
}
fun POST(handler: RequestResponse.()->Unit) {
onPost = handler
}
}
class RestProcessor(val prefix: String, val builder: RestBuilder) : Processor {
override fun tryToProcess(request: RequestResponse): Boolean {
if(request.path.startsWith(prefix)) {
if(request.request.getMethod() == HttpMethod.GET && builder.onGet != null) {
request.ok()
request.(builder.onGet.sure())()
}
else if(request.request.getMethod() == HttpMethod.POST && builder.onPost != null) {
request.ok()
request.(builder.onPost.sure())()
}
else {
request.setError(HttpResponseStatus.METHOD_NOT_ALLOWED)
}
return true;
}
return false
}
}
examples/src/nettyserver/src/StaticFileProcessor.kt
+46
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@@ -0,0 +1,46 @@
package org.jetbrains.kotlin.examples.netty
import org.jboss.netty.handler.codec.http.HttpMethod
import java.io.File
import java.io.RandomAccessFile
import org.jboss.netty.handler.codec.http.DefaultHttpResponse
import org.jboss.netty.channel.DefaultFileRegion
import org.jboss.netty.handler.codec.http.HttpVersion
import org.jboss.netty.handler.codec.http.HttpResponseStatus.*
class StaticFileProcessor(val prefix: String, val root: String) : Processor {
override fun tryToProcess(request: RequestResponse) : Boolean {
if(request.path.startsWith(prefix)) {
return request.processStaticFile()
}
return false;
}
fun RequestResponse.processStaticFile() : Boolean {
val file = File(root + File.separator + path.substring(prefix.length))
if(!file.exists())
return false;
if (request.getMethod() != HttpMethod.GET) {
setError(METHOD_NOT_ALLOWED);
return true;
}
if (file.isHidden() || !file.isFile()) {
setError(FORBIDDEN)
return true
}
var raf = RandomAccessFile(file, "r")
val fileLength = raf.length()
val response = DefaultHttpResponse(HttpVersion.HTTP_1_1, OK)
response["Content-Length"] = fileLength
channel.write(response)
channel.write(DefaultFileRegion(raf.getChannel(), 0, fileLength))
return true;
}
}
examples/src/nettyserver/static/index.html
+31
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@@ -0,0 +1,31 @@
<html>
<head>
<script src="/prototype.js" ></script>
<script language="javascript">
function onLoad() {
new Ajax.Request('/sayhello', {
method: 'get',
onSuccess: function(transport) {
$('notice').update(transport.responseText)
}
});
}
function sayHello() {
new Ajax.Request('/sayhello', {
method: 'post',
postBody: $('input').value,
onSuccess: function(transport) {
var div = document.createElement('div')
div.innerHTML = transport.responseText
$('interactions').insert(div)
}
});
}
</script>
</head>
<body onload="onLoad()">
<div id="notice"><i>Waiting...</i></div>
<input type="text" id="input"><button onclick="sayHello();">Say Hello</button>
<div id="interactions"></div>
</body>
</html>