[JAVA] How to change the maximum and maximum number of POST data in Spark

The maximum form value in Jetty is 200KB by default. Spark uses Jetty, so it's similar to this.

It seems that there are various setting methods for Jetty alone, but it is quite annoying for Spark.

I will omit the details, but the method is as follows.


public class Main {
  public static void main(String[] args) {
    EmbeddedServers.add(EmbeddedServers.Identifiers.JETTY, new EmbeddedJettyFactory(new MyJettyServerFactory()));

    get("/", () -> "Hello Spark!");

class MyJettyServerFactory implements JettyServerFactory {
     * Creates a Jetty server.
     * @param maxThreads          maxThreads
     * @param minThreads          minThreads
     * @param threadTimeoutMillis threadTimeoutMillis
     * @return a new jetty server instance
    public Server create(int maxThreads, int minThreads, int threadTimeoutMillis) {
        Server server;

        if (maxThreads > 0) {
            int max = maxThreads;
            int min = (minThreads > 0) ? minThreads : 8;
            int idleTimeout = (threadTimeoutMillis > 0) ? threadTimeoutMillis : 60000;

            server = new Server(new QueuedThreadPool(max, min, idleTimeout));
        } else {
            server = new Server();

        server.setAttribute("org.eclipse.jetty.server.Request.maxFormKeys", 20000); //Maximum number of POST data
        server.setAttribute("org.eclipse.jetty.server.Request.maxFormContentSize", 5000000); //Maximum value of POST data

        return server;

     * Creates a Jetty server with supplied thread pool
     * @param threadPool thread pool
     * @return a new jetty server instance
    public Server create(ThreadPool threadPool) {
        return threadPool != null ? new Server(threadPool) : new Server();

By the way, unless you get the value of the form programmatically, no error will occur. What about the specifications?

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