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A micro framework for creating web applications in Kotlin and Java 8 with minimal effort
/*
* Copyright 2011- Per Wendel
*
* 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 spark;
import spark.route.HttpMethod;
import spark.route.RouteMatcher;
import spark.route.RouteMatcherFactory;
import spark.webserver.SparkServer;
import spark.webserver.SparkServerFactory;
/**
* The main building block of a Spark application is a set of routes. A route is
* made up of three simple pieces:
*
*
* - A verb (get, post, put, delete, head, trace, connect, options)
* - A path (/hello, /users/:name)
* - A callback ( handle(Request request, Response response) )
*
*
* Example:
*
*
* {@code
* Spark.get(new Route("/hello") {
* public Object handle(Request request, Response response) {
* return "Hello World!";
* }
* });
*
*
*
*
*
*
* @author Per Wendel
*/
public final class Spark {
private static final int SPARK_DEFAULT_PORT = 4567;
private static boolean initialized = false;
private static SparkServer server;
private static RouteMatcher routeMatcher;
private static String ipAddress = "0.0.0.0";
private static int port = SPARK_DEFAULT_PORT;
private static String keystoreFile;
private static String keystorePassword;
private static String truststoreFile;
private static String truststorePassword;
private static String staticFileFolder = null;
private static String externalStaticFileFolder = null;
// Hide constructor
private Spark() {
}
/**
* Set the IP address that Spark should listen on. If not called the default
* address is '0.0.0.0'. This has to be called before any route mapping is
* done.
*
* @param ipAddress The ipAddress
*/
public static synchronized void setIpAddress(String ipAddress) {
if (initialized) {
throwBeforeRouteMappingException();
}
Spark.ipAddress = ipAddress;
}
/**
* Set the port that Spark should listen on. If not called the default port
* is 4567. This has to be called before any route mapping is done.
*
* @param port The port number
*/
public static synchronized void setPort(int port) {
if (initialized) {
throwBeforeRouteMappingException();
}
Spark.port = port;
}
/**
* Set the connection to be secure, using the specified keystore and
* truststore. This has to be called before any route mapping is done. You
* have to supply a keystore file, truststore file is optional (keystore
* will be reused).
*
* This method is only relevant when using embedded Jetty servers. It should
* not be used if you are using Servlets, where you will need to secure the
* connection in the servlet container
*
* @param keystoreFile The keystore file location as string
* @param keystorePassword the password for the keystore
* @param truststoreFile the truststore file location as string, leave null to reuse
* keystore
* @param truststorePassword the trust store password
*/
public static synchronized void setSecure(String keystoreFile,
String keystorePassword, String truststoreFile,
String truststorePassword) {
if (initialized) {
throwBeforeRouteMappingException();
}
if (keystoreFile == null) {
throw new IllegalArgumentException(
"Must provide a keystore file to run secured");
}
Spark.keystoreFile = keystoreFile;
Spark.keystorePassword = keystorePassword;
Spark.truststoreFile = truststoreFile;
Spark.truststorePassword = truststorePassword;
}
/**
* Sets the folder in classpath serving static files. Observe: this method
* must be called before all other methods.
*
* @param folder the folder in classpath.
*/
public static synchronized void staticFileLocation(String folder) {
if (initialized) {
throwBeforeRouteMappingException();
}
staticFileFolder = folder;
}
/**
* Sets the external folder serving static files. Observe: this method
* must be called before all other methods.
*
* @param externalFolder the external folder serving static files.
*/
public static synchronized void externalStaticFileLocation(String externalFolder) {
if (initialized) {
throwBeforeRouteMappingException();
}
externalStaticFileFolder = externalFolder;
}
/**
* Map the route for HTTP GET requests
*
* @param route The route
*/
public static synchronized void get(Route route) {
addRoute(HttpMethod.get.name(), route);
}
/**
* Map the route for HTTP POST requests
*
* @param route The route
*/
public static synchronized void post(Route route) {
addRoute(HttpMethod.post.name(), route);
}
/**
* Map the route for HTTP PUT requests
*
* @param route The route
*/
public static synchronized void put(Route route) {
addRoute(HttpMethod.put.name(), route);
}
/**
* Map the route for HTTP PATCH requests
*
* @param route The route
*/
public static synchronized void patch(Route route) {
addRoute(HttpMethod.patch.name(), route);
}
/**
* Map the route for HTTP DELETE requests
*
* @param route The route
*/
public static synchronized void delete(Route route) {
addRoute(HttpMethod.delete.name(), route);
}
/**
* Map the route for HTTP HEAD requests
*
* @param route The route
*/
public static synchronized void head(Route route) {
addRoute(HttpMethod.head.name(), route);
}
/**
* Map the route for HTTP TRACE requests
*
* @param route The route
*/
public static synchronized void trace(Route route) {
addRoute(HttpMethod.trace.name(), route);
}
/**
* Map the route for HTTP CONNECT requests
*
* @param route The route
*/
public static synchronized void connect(Route route) {
addRoute(HttpMethod.connect.name(), route);
}
/**
* Map the route for HTTP OPTIONS requests
*
* @param route The route
*/
public static synchronized void options(Route route) {
addRoute(HttpMethod.options.name(), route);
}
/**
* Maps a filter to be executed before any matching routes
*
* @param filter The filter
*/
public static synchronized void before(Filter filter) {
addFilter(HttpMethod.before.name(), filter);
}
/**
* Maps a filter to be executed after any matching routes
*
* @param filter The filter
*/
public static synchronized void after(Filter filter) {
addFilter(HttpMethod.after.name(), filter);
}
static synchronized void runFromServlet() {
if (!initialized) {
routeMatcher = RouteMatcherFactory.get();
initialized = true;
}
}
// WARNING, used for jUnit testing only!!!
static synchronized void clearRoutes() {
routeMatcher.clearRoutes();
}
// Used for jUnit testing!
static synchronized void stop() {
if (server != null) {
server.stop();
}
initialized = false;
}
private static void addRoute(String httpMethod, Route route) {
init();
routeMatcher.parseValidateAddRoute(httpMethod + " '" + route.getPath()
+ "'", route.getAcceptType(), route);
}
private static void addFilter(String httpMethod, Filter filter) {
init();
routeMatcher.parseValidateAddRoute(httpMethod + " '" + filter.getPath()
+ "'", filter.getAcceptType(), filter);
}
private static boolean hasMultipleHandlers() {
return staticFileFolder != null || externalStaticFileFolder != null;
}
private static synchronized void init() {
if (!initialized) {
routeMatcher = RouteMatcherFactory.get();
new Thread(new Runnable() {
@Override
public void run() {
server = SparkServerFactory.create(hasMultipleHandlers());
server.ignite(
ipAddress,
port,
keystoreFile,
keystorePassword,
truststoreFile,
truststorePassword,
staticFileFolder,
externalStaticFileFolder);
}
}).start();
initialized = true;
}
}
private static void throwBeforeRouteMappingException() {
throw new IllegalStateException(
"This must be done before route mapping has begun");
}
/*
* TODO: discover new TODOs.
*
*
* TODO: Make available as maven dependency, upload on repo etc...
* TODO: Add *, splat possibility
* TODO: Add validation of routes, invalid characters and stuff, also validate parameters, check static, ONGOING
*
* TODO: Javadoc
*
* TODO: Create maven archetype, "ONGOING"
* TODO: Add cache-control helpers
*
* advanced TODO list:
* TODO: Add regexp URIs
*
* Ongoing
*
* Done
* TODO: Routes are matched in the order they are defined. The rirst route that matches the request is invoked. ???
* TODO: Before method for filters...check sinatra page
* TODO: Setting Headers
* TODO: Do we want get-prefixes for all *getters* or do we want a more ruby like approach???
* (Maybe have two choices?)
* TODO: Setting Body, Status Code
* TODO: Add possibility to set content type on return, DONE
* TODO: Add possibility to access HttpServletContext in method impl, DONE
* TODO: Redirect func in web context, DONE
* TODO: Refactor, extract interfaces, DONE
* TODO: Figure out a nice name, DONE - SPARK
* TODO: Add /uri/{param} possibility, DONE
* TODO: Tweak log4j config, DONE
* TODO: Query string in web context, DONE
* TODO: Add URI-param fetching from webcontext ie. ?param=value¶m2=...etc, AND headers, DONE
* TODO: sessions? (use session servlet context?) DONE
*/
}