src/java.net.http/share/classes/jdk/internal/net/http/common/Log.java
author chegar
Tue, 17 Apr 2018 08:54:17 -0700
changeset 49765 ee6f7a61f3a5
parent 48083 src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/common/Log.java@b1c1b4ef4be2
child 50681 4254bed3c09d
child 56451 9585061fdb04
permissions -rw-r--r--
8197564: HTTP Client implementation Reviewed-by: chegar, dfuchs, michaelm, prappo Contributed-by: Chris Hegarty <chris.hegarty@oracle.com>, Daniel Fuchs <daniel.fuchs@oracle.com>, Michael McMahon <michael.x.mcmahon@oracle.com>, Pavel Rappo <pavel.rappo@oracle.com>
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/*
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 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package jdk.internal.net.http.common;
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import java.net.http.HttpHeaders;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.Set;
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import java.util.function.Supplier;
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import jdk.internal.net.http.frame.DataFrame;
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import jdk.internal.net.http.frame.Http2Frame;
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import jdk.internal.net.http.frame.WindowUpdateFrame;
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import javax.net.ssl.SNIServerName;
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import javax.net.ssl.SSLParameters;
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/**
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 * -Djava.net.HttpClient.log=
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 *          errors,requests,headers,
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 *          frames[:control:data:window:all..],content,ssl,trace
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 *
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 * Any of errors, requests, headers or content are optional.
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 *
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 * Other handlers may be added. All logging is at level INFO
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 *
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 * Logger name is "jdk.httpclient.HttpClient"
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 */
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// implements System.Logger in order to be skipped when printing the caller's
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// information
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public abstract class Log implements System.Logger {
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    static final String logProp = "jdk.httpclient.HttpClient.log";
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    public static final int OFF = 0;
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    public static final int ERRORS = 0x1;
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    public static final int REQUESTS = 0x2;
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    public static final int HEADERS = 0x4;
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    public static final int CONTENT = 0x8;
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    public static final int FRAMES = 0x10;
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    public static final int SSL = 0x20;
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    public static final int TRACE = 0x40;
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    static int logging;
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    // Frame types: "control", "data", "window", "all"
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    public static final int CONTROL = 1; // all except DATA and WINDOW_UPDATES
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    public static final int DATA = 2;
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    public static final int WINDOW_UPDATES = 4;
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    public static final int ALL = CONTROL| DATA | WINDOW_UPDATES;
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    static int frametypes;
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    static final System.Logger logger;
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    static {
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        String s = Utils.getNetProperty(logProp);
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        if (s == null) {
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            logging = OFF;
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        } else {
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            String[] vals = s.split(",");
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            for (String val : vals) {
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                switch (val.toLowerCase(Locale.US)) {
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                    case "errors":
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                        logging |= ERRORS;
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                        break;
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                    case "requests":
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                        logging |= REQUESTS;
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                        break;
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                    case "headers":
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                        logging |= HEADERS;
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                        break;
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                    case "content":
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                        logging |= CONTENT;
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                        break;
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                    case "ssl":
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                        logging |= SSL;
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                        break;
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                    case "trace":
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                        logging |= TRACE;
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                        break;
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                    case "all":
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                        logging |= CONTENT|HEADERS|REQUESTS|FRAMES|ERRORS|TRACE|SSL;
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                        break;
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                    default:
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                        // ignore bad values
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                }
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                if (val.startsWith("frames")) {
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                    logging |= FRAMES;
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                    String[] types = val.split(":");
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                    if (types.length == 1) {
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                        frametypes = CONTROL | DATA | WINDOW_UPDATES;
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                    } else {
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                        for (String type : types) {
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                            switch (type.toLowerCase(Locale.US)) {
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                                case "control":
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                                    frametypes |= CONTROL;
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                                    break;
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                                case "data":
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                                    frametypes |= DATA;
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                                    break;
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                                case "window":
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                                    frametypes |= WINDOW_UPDATES;
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                                    break;
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                                case "all":
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                                    frametypes = ALL;
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                                    break;
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                                default:
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                                    // ignore bad values
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                            }
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                        }
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                    }
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                }
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            }
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        }
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        if (logging != OFF) {
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            logger = System.getLogger("jdk.httpclient.HttpClient");
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        } else {
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            logger = null;
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        }
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    }
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    public static boolean errors() {
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        return (logging & ERRORS) != 0;
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    }
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    public static boolean requests() {
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        return (logging & REQUESTS) != 0;
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    }
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    public static boolean headers() {
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        return (logging & HEADERS) != 0;
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    }
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    public static boolean trace() {
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        return (logging & TRACE) != 0;
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    }
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    public static boolean ssl() {
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        return (logging & SSL) != 0;
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    }
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    public static boolean frames() {
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        return (logging & FRAMES) != 0;
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    }
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    public static void logError(String s, Object... s1) {
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        if (errors()) {
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            logger.log(Level.INFO, "ERROR: " + s, s1);
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        }
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    }
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    public static void logError(Throwable t) {
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        if (errors()) {
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            String s = Utils.stackTrace(t);
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            logger.log(Level.INFO, "ERROR: " + s);
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        }
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    }
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    public static void logSSL(String s, Object... s1) {
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        if (ssl()) {
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            logger.log(Level.INFO, "SSL: " + s, s1);
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        }
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    }
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    public static void logSSL(Supplier<String> msgSupplier) {
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        if (ssl()) {
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            logger.log(Level.INFO, "SSL: " + msgSupplier.get());
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        }
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    }
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    public static void logTrace(String s, Object... s1) {
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        if (trace()) {
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            String format = "TRACE: " + s;
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            logger.log(Level.INFO, format, s1);
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        }
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    }
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    public static void logRequest(String s, Object... s1) {
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        if (requests()) {
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            logger.log(Level.INFO, "REQUEST: " + s, s1);
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        }
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    }
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    public static void logResponse(Supplier<String> supplier) {
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        if (requests()) {
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            logger.log(Level.INFO, "RESPONSE: " + supplier.get());
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        }
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    }
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    public static void logHeaders(String s, Object... s1) {
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        if (headers()) {
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            logger.log(Level.INFO, "HEADERS: " + s, s1);
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        }
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    }
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    public static boolean loggingFrame(Class<? extends Http2Frame> clazz) {
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        if (frametypes == ALL) {
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            return true;
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        }
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        if (clazz == DataFrame.class) {
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            return (frametypes & DATA) != 0;
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        } else if (clazz == WindowUpdateFrame.class) {
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            return (frametypes & WINDOW_UPDATES) != 0;
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        } else {
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            return (frametypes & CONTROL) != 0;
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        }
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    }
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    public static void logFrames(Http2Frame f, String direction) {
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        if (frames() && loggingFrame(f.getClass())) {
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            logger.log(Level.INFO, "FRAME: " + direction + ": " + f.toString());
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        }
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    }
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    public static void logParams(SSLParameters p) {
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        if (!Log.ssl()) {
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            return;
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        }
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        if (p == null) {
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            Log.logSSL("SSLParameters: Null params");
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            return;
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        }
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        final StringBuilder sb = new StringBuilder("SSLParameters:");
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        final List<Object> params = new ArrayList<>();
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        if (p.getCipherSuites() != null) {
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            for (String cipher : p.getCipherSuites()) {
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                sb.append("\n    cipher: {")
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                        .append(params.size()).append("}");
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                params.add(cipher);
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            }
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        }
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        // SSLParameters.getApplicationProtocols() can't return null
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        // JDK 8 EXCL START
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        for (String approto : p.getApplicationProtocols()) {
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            sb.append("\n    application protocol: {")
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                    .append(params.size()).append("}");
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            params.add(approto);
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        }
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        // JDK 8 EXCL END
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        if (p.getProtocols() != null) {
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            for (String protocol : p.getProtocols()) {
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                sb.append("\n    protocol: {")
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                        .append(params.size()).append("}");
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                params.add(protocol);
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            }
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        }
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        if (p.getEndpointIdentificationAlgorithm() != null) {
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            sb.append("\n    endpointIdAlg: {")
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                .append(params.size()).append("}");
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            params.add(p.getEndpointIdentificationAlgorithm());
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        }
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        if (p.getServerNames() != null) {
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            for (SNIServerName sname : p.getServerNames()) {
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                sb.append("\n    server name: {")
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                        .append(params.size()).append("}");
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                params.add(sname.toString());
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            }
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        }
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        sb.append('\n');
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        Log.logSSL(sb.toString(), params.toArray());
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    }
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    public static void dumpHeaders(StringBuilder sb, String prefix, HttpHeaders headers) {
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        if (headers != null) {
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            Map<String,List<String>> h = headers.map();
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            Set<Map.Entry<String,List<String>>> entries = h.entrySet();
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            String sep = "";
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            for (Map.Entry<String,List<String>> entry : entries) {
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                String key = entry.getKey();
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                List<String> values = entry.getValue();
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                if (values == null || values.isEmpty()) {
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                    // should not happen
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                    sb.append(sep);
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                    sb.append(prefix).append(key).append(':');
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                    sep = "\n";
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                    continue;
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                }
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                for (String value : values) {
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                    sb.append(sep);
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                    sb.append(prefix).append(key).append(':');
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                    sb.append(' ').append(value);
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                    sep = "\n";
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                }
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            }
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            sb.append('\n');
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        }
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    }
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    // not instantiable
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    private Log() {}
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}