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Program, unless a warranty or assumption of liability accompanies a
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

35
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# Mangadex@Home
## To Build
### Requirements
- The Java(TM) SE JDK, version 8 or greater
- ~500MB of free space
### Instructions
- Run `./gradlew build` in order to build the entire project
- Find the generated jars in `build/libs`, where the `-all` jar is fat-jar with all dependencies
## Features
### V1.0
- [X] **implement [API calls](https://gitlab.com/mangadex/mangadex_at_home/-/wikis/backend)**
- [X] HTTPS
- [X] cache eviction (on max size)
- [X] cert refresh (when sent by API)
- [X] async server (for users and upstream)
- [X] streaming response (for users, upstream and in between)
- [X] logging files
- [X] config file
- [X] license GPL V3 (c) Mangadex.org
### V2.0
- [X] bandwidth limit
- [X] egress limit
- [X] max connections limit
- [X] graceful shutdown (finish in-flight requests)
- [X] cache encryption (encryption key = cache key)
### Stashed
- [ ] IPv6
- [ ] HTTP/2 and HTTP/3

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<mxfile host="Electron" modified="2020-06-02T01:45:48.396Z" agent="5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/13.0.3 Chrome/80.0.3987.163 Electron/8.2.1 Safari/537.36" etag="YbFghwnMSFGyhuGluChs" version="13.0.3" type="device"><diagram id="UM38FNnQUuN8YsT_Dwxj" name="Page-1">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</diagram></mxfile>

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plugins {
id 'java'
id 'org.jetbrains.kotlin.jvm' version '1.3.72'
id 'application'
id 'com.github.johnrengelman.shadow' version '5.2.0'
id "com.diffplug.gradle.spotless" version "3.18.0"
}
group = 'com.mangadex'
version = '1.0.0-rc0'
mainClassName = 'mdnet.base.MangadexClient'
repositories {
mavenCentral()
jcenter()
}
dependencies {
implementation group: 'com.konghq', name: 'unirest-java', version: '3.7.02'
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
implementation group: "org.http4k", name: "http4k-core", version: "$http_4k_version"
implementation group: "org.http4k", name: "http4k-server-netty", version: "$http_4k_version"
implementation group: "org.http4k", name: "http4k-client-apache", version: "$http_4k_version"
implementation group: 'commons-io', name: 'commons-io', version: '2.7'
implementation "ch.qos.logback:logback-classic:$logback_version"
}
java {
sourceCompatibility = JavaVersion.VERSION_1_8
targetCompatibility = JavaVersion.VERSION_1_8
}
spotless {
java {
eclipse()
removeUnusedImports()
trimTrailingWhitespace()
endWithNewline()
}
kotlin {
ktlint()
trimTrailingWhitespace()
endWithNewline()
}
}
run {
args = ["dev/settings.json"]
}

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{
"client_secret": "7rc7p00md0n0xsvqnv4rv17fthvjjrzpdghak1yq45833zvdvnb0",
"max_cache_size_mib": 2048,
"client_port": 8080,
"max_burst_rate_kib_per_second": 100,
"max_bandwidth_mib_per_hour": 1
}

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http_4k_version=3.249.0
logback_version=1.2.1

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#Wed May 27 21:24:59 CDT 2020
distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStorePath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME

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#!/usr/bin/env sh
##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null
APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m"'
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"
warn () {
echo "$*"
}
die () {
echo
echo "$*"
echo
exit 1
}
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
NONSTOP* )
nonstop=true
;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD="java"
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi
# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi
# For Cygwin, switch paths to Windows format before running java
if $cygwin ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
JAVACMD=`cygpath --unix "$JAVACMD"`
# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=$((i+1))
done
case $i in
(0) set -- ;;
(1) set -- "$args0" ;;
(2) set -- "$args0" "$args1" ;;
(3) set -- "$args0" "$args1" "$args2" ;;
(4) set -- "$args0" "$args1" "$args2" "$args3" ;;
(5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
(6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
(7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
(8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
(9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi
# Escape application args
save () {
for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
echo " "
}
APP_ARGS=$(save "$@")
# Collect all arguments for the java command, following the shell quoting and substitution rules
eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
cd "$(dirname "$0")"
fi
exec "$JAVACMD" "$@"

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@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto init
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:init
@rem Get command-line arguments, handling Windows variants
if not "%OS%" == "Windows_NT" goto win9xME_args
:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2
:win9xME_args_slurp
if "x%~1" == "x" goto execute
set CMD_LINE_ARGS=%*
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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rootProject.name = 'mangadex_at_home'

87
src/main/java/mdnet/base/CachingInputStream.java Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 mdnet.base;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.input.ProxyInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.concurrent.ExecutorService;
import static org.apache.commons.io.IOUtils.EOF;
public class CachingInputStream extends ProxyInputStream {
private final OutputStream cache;
private final ExecutorService executor;
private final Runnable onClose;
public CachingInputStream(InputStream response, ExecutorService executor, OutputStream cache, Runnable onClose) {
super(response);
this.executor = executor;
this.cache = cache;
this.onClose = onClose;
}
@Override
public void close() throws IOException {
executor.submit(() -> {
try {
IOUtils.copy(in, cache);
} catch (IOException ignored) {
} finally {
try {
in.close();
} catch (IOException ignored) {
}
try {
cache.close();
} catch (IOException ignored) {
}
onClose.run();
}
});
}
@Override
public int read() throws IOException {
final int ch = super.read();
if (ch != EOF) {
cache.write(ch);
}
return ch;
}
@Override
public int read(final byte[] bts, final int st, final int end) throws IOException {
final int n = super.read(bts, st, end);
if (n != EOF) {
cache.write(bts, st, n);
}
return n;
}
@Override
public int read(final byte[] bts) throws IOException {
final int n = super.read(bts);
if (n != EOF) {
cache.write(bts, 0, n);
}
return n;
}
}

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package mdnet.base;
import com.google.gson.annotations.SerializedName;
import java.util.Objects;
import java.util.regex.Pattern;
public final class ClientSettings {
@SerializedName("max_cache_size_mib")
private final long maxCacheSizeMib;
@SerializedName("max_bandwidth_mib_per_hour")
private final long maxBandwidthMibPerHour;
@SerializedName("max_burst_rate_kib_per_second")
private final long maxBurstRateKibPerSecond;
@SerializedName("client_port")
private final int clientPort;
@SerializedName("client_secret")
private final String clientSecret;
public ClientSettings(long maxCacheSizeMib, long maxBandwidthMibPerHour, long maxBurstRateKibPerSecond,
int clientPort, String clientSecret) {
this.maxCacheSizeMib = maxCacheSizeMib;
this.maxBandwidthMibPerHour = maxBandwidthMibPerHour;
this.maxBurstRateKibPerSecond = maxBurstRateKibPerSecond;
this.clientPort = clientPort;
this.clientSecret = Objects.requireNonNull(clientSecret);
}
public long getMaxCacheSizeMib() {
return maxCacheSizeMib;
}
public long getMaxBandwidthMibPerHour() {
return maxBandwidthMibPerHour;
}
public long getMaxBurstRateKibPerSecond() {
return maxBurstRateKibPerSecond;
}
public int getClientPort() {
return clientPort;
}
public String getClientSecret() {
return clientSecret;
}
@Override
public String toString() {
return "ClientSettings{" + "maxCacheSizeMib=" + maxCacheSizeMib + ", maxBandwidthMibPerHour="
+ maxBandwidthMibPerHour + ", maxBurstRateKibPerSecond=" + maxBurstRateKibPerSecond + ", clientPort="
+ clientPort + ", clientSecret='" + clientSecret + '\'' + '}';
}
public static boolean isSecretValid(String clientSecret) {
final int CLIENT_KEY_LENGTH = 52;
return Pattern.matches("^[a-zA-Z0-9]{" + CLIENT_KEY_LENGTH + "}$", clientSecret);
}
}

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src/main/java/mdnet/base/Constants.java Normal file
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package mdnet.base;
import java.time.Duration;
public class Constants {
public static final int CLIENT_BUILD = 1;
public static final String CLIENT_VERSION = "1.0";
public static final Duration MAX_AGE_CACHE = Duration.ofDays(14);
public static final int MAX_CONCURRENT_CONNECTIONS = 100;
public static final String OVERLOADED_MESSAGE = "This server is experiencing a surge in connections. Please try again later.";
}

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src/main/java/mdnet/base/MangadexClient.java Normal file
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package mdnet.base;
import com.google.gson.Gson;
import mdnet.cache.DiskLruCache;
import org.http4k.server.Http4kServer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
public class MangadexClient {
private final static Logger LOGGER = LoggerFactory.getLogger(MangadexClient.class);
// This lock protects the Http4kServer from concurrent restart attempts
private final Object shutdownLock = new Object();
private final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
private final ServerHandler serverHandler;
private final ClientSettings clientSettings;
private final AtomicReference<Statistics> statistics;
private ServerSettings serverSettings;
// if this is null, then the server has shutdown
private Http4kServer engine;
private DiskLruCache cache;
public MangadexClient(ClientSettings clientSettings) {
this.clientSettings = clientSettings;
this.serverHandler = new ServerHandler(clientSettings);
this.statistics = new AtomicReference<>();
try {
cache = DiskLruCache.open(new File("cache"), 1, 2,
clientSettings.getMaxCacheSizeMib() * 1024 * 1024 /* MiB to bytes */);
} catch (IOException e) {
MangadexClient.dieWithError(e);
}
}
// This function also does most of the program initialization.
public void runLoop() {
statistics.set(new Statistics());
loginAndStartServer();
if (LOGGER.isInfoEnabled()) {
LOGGER.info("MDNet initialization completed successfully. Starting normal operation.");
}
// we don't really care about the Atomic part here
AtomicInteger counter = new AtomicInteger();
// ping keep-alive every 45 seconds
executorService.scheduleAtFixedRate(() -> {
int num = counter.get();
if (num == 80) {
counter.set(0);
// if server is stopped due to egress limits, restart it
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Hourly update: refreshing statistics");
}
statistics.set(new Statistics());
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Restarting server stopped due to hourly bandwidth limit");
}
if (engine == null) {
loginAndStartServer();
}
} else {
counter.set(num + 1);
}
if (clientSettings.getMaxBandwidthMibPerHour() != 0 && clientSettings.getMaxBandwidthMibPerHour() * 1024
* 1024 /* MiB to bytes */ < statistics.get().getBytesSent().get()) {
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Shutting down server as hourly bandwidth limit reached");
}
synchronized (shutdownLock) {
logoutAndStopServer();
}
}
// if the server is offline then don't try and refresh certs
if (engine == null) {
return;
}
ServerSettings n = serverHandler.pingControl(serverSettings);
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Server settings received: {}", n);
}
if (n != null && (n.getTls() != null || !n.getImageServer().equals(serverSettings.getImageServer()))) {
// certificates or upstream url must have changed, restart webserver
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Doing internal restart of HTTP server to refresh certs/upstream URL");
}
synchronized (shutdownLock) {
logoutAndStopServer();
loginAndStartServer();
}
}
}, 45, 45, TimeUnit.SECONDS);
}
private void loginAndStartServer() {
serverSettings = serverHandler.loginToControl();
if (serverSettings == null) {
MangadexClient.dieWithError("Failed to get a login response from server - check API secret for validity");
}
engine = ApplicationKt.getServer(cache, serverSettings, clientSettings, statistics);
engine.start();
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Internal HTTP server was successfully started");
}
}
private void logoutAndStopServer() {
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Gracefully shutting down HTTP server");
}
serverHandler.logoutFromControl();
engine.stop();
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Internal HTTP server has gracefully shut down");
}
engine = null;
}
public void shutdown() {
executorService.shutdown();
synchronized (shutdownLock) {
if (engine == null) {
return;
}
logoutAndStopServer();
}
}
public static void main(String[] args) {
System.out.println("Mangadex@Home Client " + Constants.CLIENT_VERSION + " (Build " + Constants.CLIENT_BUILD
+ ") initializing\n");
System.out.println("Copyright (c) 2020, Mangadex");
try {
String file = "settings.json";
if (args.length == 1) {
file = args[0];
} else if (args.length != 0) {
MangadexClient.dieWithError("Expected one argument: path to config file, or nothing");
}
ClientSettings settings = new Gson().fromJson(new FileReader(file), ClientSettings.class);
if (!ClientSettings.isSecretValid(settings.getClientSecret()))
MangadexClient.dieWithError("Config Error: API Secret is invalid, must be 52 alphanumeric characters");
if (settings.getClientPort() == 0) {
MangadexClient.dieWithError("Config Error: Invalid port number");
}
if (settings.getMaxCacheSizeMib() < 1024) {
MangadexClient.dieWithError("Config Error: Invalid max cache size, must be >= 1024 MiB (1GiB)");
}
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Client settings loaded: {}", settings);
}
MangadexClient client = new MangadexClient(settings);
Runtime.getRuntime().addShutdownHook(new Thread(client::shutdown));
client.runLoop();
} catch (FileNotFoundException e) {
MangadexClient.dieWithError(e);
}
}
public static void dieWithError(Throwable e) {
if (LOGGER.isErrorEnabled()) {
LOGGER.error("Critical Error", e);
}
System.exit(1);
}
public static void dieWithError(String error) {
if (LOGGER.isErrorEnabled()) {
LOGGER.error("Critical Error: " + error);
}
System.exit(1);
}
}

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src/main/java/mdnet/base/ServerHandler.java Normal file
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package mdnet.base;
import kong.unirest.HttpResponse;
import kong.unirest.Unirest;
import kong.unirest.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
public class ServerHandler {
private final static Logger LOGGER = LoggerFactory.getLogger(ServerHandler.class);
private static final String SERVER_ADDRESS = "https://mangadex-test.net/";
private final ClientSettings settings;
public ServerHandler(ClientSettings settings) {
this.settings = settings;
}
public boolean logoutFromControl() {
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Disconnecting from the control server");
}
HashMap<String, Object> params = new HashMap<>();
params.put("secret", settings.getClientSecret());
HttpResponse<?> json = Unirest.post(SERVER_ADDRESS + "stop").header("Content-Type", "application/json")
.body(new JSONObject(params)).asEmpty();
return json.isSuccess();
}
public ServerSettings loginToControl() {
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Connecting to the control server");
}
HashMap<String, Object> params = new HashMap<>();
params.put("secret", settings.getClientSecret());
params.put("port", settings.getClientPort());
params.put("disk_space", settings.getMaxCacheSizeMib() * 1024 * 1024 /* MiB to bytes */);
HttpResponse<ServerSettings> response = Unirest.post(SERVER_ADDRESS + "ping")
.header("Content-Type", "application/json").body(new JSONObject(params)).asObject(ServerSettings.class);
if (response.isSuccess()) {
return response.getBody();
} else {
// unirest deserializes errors into an object with all null fields instead of a