jdisc_http_service/src/main/java/com/yahoo/jdisc/http/server/jetty/HttpRequestFactory.java


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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.server.jetty;

import com.yahoo.jdisc.Response;
import com.yahoo.jdisc.http.HttpRequest;
import com.yahoo.jdisc.http.servlet.ServletRequest;
import com.yahoo.jdisc.service.CurrentContainer;
import org.eclipse.jetty.util.Utf8Appendable;

import javax.servlet.http.HttpServletRequest;
import java.net.InetSocketAddress;
import java.net.URI;
import java.security.cert.X509Certificate;
import java.util.Enumeration;

import static com.yahoo.jdisc.http.core.HttpServletRequestUtils.getConnection;

/**
 * @author Simon Thoresen Hult
 * @author bjorncs
 */
class HttpRequestFactory {

    public static HttpRequest newJDiscRequest(CurrentContainer container, HttpServletRequest servletRequest) {
        try {
            HttpRequest httpRequest = HttpRequest.newServerRequest(
                    container,
                    getUri(servletRequest),
                    HttpRequest.Method.valueOf(servletRequest.getMethod()),
                    HttpRequest.Version.fromString(servletRequest.getProtocol()),
                    new InetSocketAddress(servletRequest.getRemoteAddr(), servletRequest.getRemotePort()),
                    getConnection(servletRequest).getCreatedTimeStamp());
            httpRequest.context().put(ServletRequest.JDISC_REQUEST_X509CERT, getCertChain(servletRequest));
            return httpRequest;
        } catch (Utf8Appendable.NotUtf8Exception e) {
            throw createBadQueryException(e);
        }
    }

    public static URI getUri(HttpServletRequest servletRequest) {
        String query = servletRequest.getQueryString();
        try {
            return URI.create(servletRequest.getRequestURL() + (query != null ? '?' + query : ""));
        } catch (IllegalArgumentException e) {
            throw createBadQueryException(e);
        }
    }

    private static RequestException createBadQueryException(IllegalArgumentException e) {
        return new RequestException(Response.Status.BAD_REQUEST, "Query violates RFC 2396: " + e.getMessage(), e);
    }

    public static void copyHeaders(HttpServletRequest from, HttpRequest to) {
        for (Enumeration<String> it = from.getHeaderNames(); it.hasMoreElements(); ) {
            String key = it.nextElement();
            for (Enumeration<String> value = from.getHeaders(key); value.hasMoreElements(); ) {
                to.headers().add(key, value.nextElement());
            }
        }
    }

    private static X509Certificate[] getCertChain(HttpServletRequest servletRequest) {
        return (X509Certificate[]) servletRequest.getAttribute("javax.servlet.request.X509Certificate");
    }
}