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安装编译工具及依赖：

yum -y groupinstall "Development Tools"
yum -y install qt-devel boost-devel openssl-devel qt5-qtbase-devel qt5-linguist

安装libtorrent，libtorrent1.1.x版本会出现invalid port问题，参考https://tieba.baidu.com/p/5864985886

wget https://github.com/arvidn/libtorrent/releases/download/libtorrent-1_1_9/libtorrent-rasterbar-1.1.9.tar.gz
tar -zxf libtorrent-rasterbar-1.1.9.tar.gz
cd libtorrent-rasterbar-1.1.9
#修改为固定端口号
#sed -i "s/i2p ? 1 : tracker_req().listen_port/8999/" src/http_tracker_connection.cpp
./configure --prefix=/usr/local/libtorrent CXXFLAGS=-std=c++11
make && make install
echo '/usr/local/libtorrent/lib' > /etc/ld.so.conf.d/libtorrent-x86_64.conf 
ldconfig
#export LD_LIBRARY_PATH=/usr/local/libtorrent/lib/
export CPLUS_INCLUDE_PATH=/usr/local/libtorrent/include/
export PKG_CONFIG_PATH=/usr/local/libtorrent/lib/pkgconfig/

安装qbittorrent：

wget https://github.com/qbittorrent/qBittorrent/archive/release-4.1.2.tar.gz
tar zxf release-4.1.2.tar.gz
cd qBittorrent-release-4.1.2/
./configure --prefix=/usr/local/qbittorrent --disable-gui
make && make install
export PATH=$PATH:/usr/local/qbittorrent/bin/ 
echo 'export PATH=$PATH:/usr/local/qbittorrent/bin/' >> ~/.bashrc 

配置文件：

cat > ~/.config/qBittorrent/qBittorrent.conf <<- EOM
[AutoRun]
enabled=false
program=

[BitTorrent]
IPFilter\Enabled=false
Session\AnnounceToAllTiers=true
Session\BTProtocol=TCP
Session\MultiConnectionsPerIp=true
Session\SendBufferLowWatermark=7680
Session\SendBufferWatermark=15360
Session\SendBufferWatermarkFactor=150
Session\SuggestMode=true

[LegalNotice]
Accepted=true

[Preferences]
Advanced\AnnounceToAllTrackers=true
Advanced\osCache=true
Bittorrent\AddTrackers=false
Bittorrent\DHT=false
Bittorrent\Encryption=0
Bittorrent\LSD=false
Bittorrent\MaxConnecs=2000
Bittorrent\MaxConnecsPerTorrent=200
Bittorrent\MaxRatioAction=0
Bittorrent\MaxUploads=1000
Bittorrent\MaxUploadsPerTorrent=100
Bittorrent\PeX=false
Bittorrent\uTP=false
Bittorrent\uTP_rate_limited=true
Connection\GlobalDLLimit=30000
Connection\GlobalDLLimitAlt=-1
Connection\GlobalUPLimit=30000
Connection\GlobalUPLimitAlt=-1
Connection\MaxHalfOpenConnec=200
Connection\PortRangeMin=8999
Connection\ResolvePeerCountries=false
Connection\ResolvePeerHostNames=false
Connection\UPnP=false
Downloads\PreAllocation=false
Downloads\SavePath=/home/download/
Downloads\ScanDirsV2=@Variant(\0\0\0\x1c\0\0\0\0)
DynDNS\DomainName=changeme.dyndns.org
DynDNS\Enabled=false
DynDNS\Password=
DynDNS\Service=0
DynDNS\Username=
General\Locale=en
General\UseRandomPort=false
IPFilter\Enabled=false
MailNotification\email=
MailNotification\enabled=false
MailNotification\password=
MailNotification\req_auth=true
MailNotification\req_ssl=false
MailNotification\smtp_server=smtp.changeme.com
MailNotification\username=
Queueing\MaxActiveDownloads=500
Queueing\MaxActiveTorrents=500
Queueing\MaxActiveUploads=500
Queueing\QueueingEnabled=false
WebUI\Address=0.0.0.0
WebUI\AuthSubnetWhitelist=@Invalid()
WebUI\AuthSubnetWhitelistEnabled=false
WebUI\CSRFProtection=true
WebUI\ClickjackingProtection=true
WebUI\HTTPS\Enabled=false
WebUI\LocalHostAuth=true
WebUI\Port=8080
WebUI\ServerDomains=
WebUI\UseUPnP=false
EOM

参考：https://github.com/qbittorrent/qBittorrent/wiki/Compiling-qbittorrent-nox-for-CentOS-from-source

rtorrent开启rpc：

scgi_port = 127.0.0.1:5000

通过nginx中转rpc请求：

server {
    listen 8000;
    server_name localhost;
    location ^~ /RPC2 {
        include scgi_params;
        scgi_pass   127.0.0.1:5000;
    }
}

php需安装xmlrpc扩展：

<?php
class XMLRPCClient
{
  public function __construct($uri)
  {
    $this->uri = $uri;
    $this->ch = null;
  }

  public function __destruct()
  {
    $this->close();
  }

  public function close()
  {
    if ($this->ch !== null)
    {
      curl_close($this->ch);
    }
    $this->ch = null;
  }

  public function get($method, $params = array())
  {
    $xml = xmlrpc_encode_request($method,$params);
    if ($this->ch === null)
    {
      $this->ch = curl_init();
      curl_setopt($this->ch, CURLOPT_URL, $this->uri);
      curl_setopt($this->ch, CURLOPT_HEADER, 0); 
      curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($this->ch, CURLOPT_POST, true);
    }
    curl_setopt($this->ch, CURLOPT_POSTFIELDS, $xml);
    $response = curl_exec($this->ch);
    $response = str_replace('i8>', 'string>', $response);
    $result = xmlrpc_decode_request($response, $method);
    return $result;
  }
}

$client = new XMLRPCClient("http://127.0.0.1:8000/RPC2");
//查看rpc命令列表
var_dump($client->get("system.listMethods"));
//查看任务列表
$list = $client->get("download_list", array("","started"));
//文件路径
$filepath = $client->get("d.get_base_path", $list[0]);
//上传速度
$up_rate = $client->get("d.get_up_rate", $list[0]);
$down_rate = $client->get("d.get_down_rate", $list[0]);
echo $up_rate.'/'.$down_rate.PHP_EOL;
//删除下载
//$client->get("d.erase", $list[0]);
//删除文件
//unlink($filepath);

rpc命令列表：https://github.com/rakshasa/rtorrent/wiki/rTorrent-0.9-Comprehensive-Command-list-(WIP)

能完epel源可直接安装：

yum install qbittorrent-nox -y

启动：

qbittorrent-nox --webui-port=8080 -d

通过浏览器访问：ip:8080，默认账号：admin/adminadmin

centos下epel源可直接安装：

yum install rtorrent

配置文件.rtorrent.rc ：

#下载时每个种子的最大连接数
min_peers = 1
max_peers = 500
#种子下载完成后每个种子最大连接数，-1等同于上面下载时连接数
min_peers_seed = -1
max_peers_seed = -1

#全局最大上传和下载连接数
max_uploads_global = 0
max_downloads_global = 0

#每个种子最大上传和下载连接数
max_uploads = 200
max_downloads = 200

#上传/下载限速，0为不限制
download_rate = 0
upload_rate = 0


check_hash = no
directory = /root/download
session = /root/session

port_random = yes
port_range = 6998-10000



#外出连接加密，如果连接失败转为不加密重试，允许进入连接加密，同时还允许未加密连接进入
#protocol.encryption.set = allow_incoming,try_outgoing,enable_retry 

#只允许进入、外出连接加密和内容加密
protocol.encryption.set = require

#进入、外出连接和内容都必须加密
#protocol.encryption.set = require,require_RC4

encoding_list = utf-8
dht = off
peer_exchange = no
use_udp_trackers = yes

#log.open_file = "rtorrent.log", (cat,/tmp/rtorrent.log)  
#log.add_output = "debug", "rtorrent.log"
#当删除任务时同时删除下载的文件
method.set_key = event.download.erased,delete_erased,"execute=rm,-rf,--,$d.base_path="
schedule = low_diskspace,5,60,close_low_diskspace=100M
schedule = watch_directory,5,5,load_start=/root/watch/*.torrent

在tmux或screen窗口内启动：

mkdir session download watch
rtorrent

将种上传到watch目录自动开始下载，在管理窗口通过上下左右方向键可查看详细信息。
ctrl+q退出，ctrl+d暂停，再按ctrl+d删除，ctrl+s开始。
加密的相关参数，多个值应该和iptables规则相似，从左到右匹配，默认不处理。

# Encryption options, set to none (default) or any combination of the following:
# allow_incoming: allow incoming encrypted connections
# try_outgoing: use encryption for outgoing connections
# require: disable unencrypted handshakes
# require_RC4: also disable plaintext transmission after the initial encrypted handshake
# enable_retry: if the initial outgoing connection fails, retry with encryption turned on if it was off or off if it was on
# prefer_plaintext: choose plaintext when peer offers a choice between plaintext transmission and RC4 encryption, otherwise RC4 will be used

使用epel源安装Transmission：

yum install transmission-daemon -y

修改配置文件允许远程管理：
/var/lib/transmission/.config/transmission-daemon/settings.json

"rpc-enabled": true,
"rpc-authentication-required": true,
"rpc-password": "password",
"rpc-username": "admin",
"rpc-host-whitelist-enabled": false,
"rpc-whitelist-enabled": false,

启动：

systemctl start transmission-daemon  
systemctl enable transmission-daemon  

在本地使用transmission gui管理。