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aria2c.go
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aria2c.go
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package main
import (
"bufio"
"bytes"
"encoding/json"
"flag"
"fmt"
"github.com/hanjm/log"
"io"
"io/ioutil"
"net/http"
"os/exec"
"strings"
"time"
)
// iana say port 6902-6934 Unassigned, it may be safety
// https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml
var aria2cPort = flag.Int("aria2cPort", 6902, "the command-line-arguments 'rpc-listen-port' when start aria2c")
// json rpc client
type Aria2cRPCClient struct {
httpClient *http.Client
requestURL string
}
func NewAria2cRPCClient() *Aria2cRPCClient {
reqURL := fmt.Sprintf("http://127.0.0.1:%d/jsonrpc", *aria2cPort)
return &Aria2cRPCClient{
httpClient: &http.Client{
Timeout: time.Minute,
},
requestURL: reqURL,
}
}
func (c *Aria2cRPCClient) AddURI(uri string) (taskGID string, err error) {
var respResult string
return respResult, c.callAria2cAndUnmarshal("aria2.addUri", uri, []interface{}{[]string{uri}}, &respResult)
}
func (c *Aria2cRPCClient) AddTorrent(base64Content string) (taskGID string, err error) {
var respResult string
return respResult, c.callAria2cAndUnmarshal("aria2.addTorrent", "addTorrent", []interface{}{base64Content}, &respResult)
}
type Aria2cTellStatusResult struct {
CompletedLength int64 `json:"completedLength,string"`
Connections int `json:"connections,string"`
DownloadSpeed int64 `json:"downloadSpeed,string"`
Files []struct {
CompletedLength int64 `json:"completedLength,string"`
Index int `json:"index,string"`
Length int64 `json:"length,string"`
Path string `json:"path"`
Selected bool `json:"selected,string"`
URIs []map[string]string `json:"uris"`
} `json:"files"`
FollowedBy []string `json:"followedBy"`
Following string `json:"following"`
GID string `json:"gid"`
NumSeeders int `json:"numSeeders,string"`
Seeder bool `json:"seeder,string"`
Status string `json:"status"`
TotalLength int64 `json:"totalLength,string"`
UploadLength int64 `json:"uploadLength,string"`
UploadSpeed int64 `json:"uploadSpeed,string"`
}
func (r *Aria2cTellStatusResult) GetFilePath() string {
for _, v := range r.Files {
return v.Path
}
return ""
}
func (r *Aria2cTellStatusResult) Completed() bool {
return r.Status == "complete"
}
func (c *Aria2cRPCClient) TellStatus(taskGID string) (*Aria2cTellStatusResult, error) {
var respResult = Aria2cTellStatusResult{}
return &respResult, c.callAria2cAndUnmarshal("aria2.tellStatus", taskGID, []interface{}{taskGID}, &respResult)
}
func (c *Aria2cRPCClient) RemoveDownloadResult(taskGID string) error {
var respResult string
err := c.callAria2cAndUnmarshal("aria2.removeDownloadResult", taskGID, []interface{}{taskGID}, &respResult)
if err != nil {
return err
}
if respResult != "OK" {
return fmt.Errorf("result expect 'ok', not %s", respResult)
}
return nil
}
func (c *Aria2cRPCClient) callAria2cAndUnmarshal(method string, requestID string, params []interface{}, respResult interface{}) (err error) {
var rpcReq = struct {
Method string `json:"method"`
JSONRPC string `json:"jsonrpc"`
ID string `json:"id"`
Params []interface{} `json:"params"`
}{
Method: method,
JSONRPC: "2.0",
ID: requestID,
Params: params,
}
reqData, err := json.Marshal(&rpcReq)
if err != nil {
err = fmt.Errorf("[callAria2c]marshal rpc req to json error:%s", err)
return err
}
var resp *http.Response
const maxRetry = 3
for retry := 1; retry <= maxRetry; retry++ {
resp, err = c.httpClient.Post(c.requestURL, "application/json-rpc", bytes.NewReader(reqData))
if err != nil {
err = fmt.Errorf("[callAria2c]do request error:%s, is aria2c process running? ", err)
log.Warnf("%s, retry... %d/%d", err, retry, maxRetry)
time.Sleep(time.Second)
} else {
break
}
}
if err != nil {
return err
}
defer resp.Body.Close()
respData, err := ioutil.ReadAll(resp.Body)
if err != nil {
err = fmt.Errorf("[callAria2c]read rpc resp error:%s", err)
return err
}
var rpcResp = struct {
ID string `json:"id"`
JSONRPC string `json:"jsonrpc"`
Result json.RawMessage `json:"result"`
Error struct {
Code int64 `json:"code"`
Message string `json:"message"`
} `json:"error"`
}{}
err = json.Unmarshal(respData, &rpcResp)
if err != nil {
err = fmt.Errorf("[callAria2c]json.Unmarshal respData error:%s, rawBody:%s", err, respData)
return err
}
if rpcResp.Error.Code != 0 {
return fmt.Errorf("[callAria2c]aria2 return error, code:%d, message:%s", rpcResp.Error.Code, rpcResp.Error.Message)
}
//log.Debugf("[Aria2cTellStatusResult]rpcResp.Result:%s", rpcResp.Result)
err = json.Unmarshal(rpcResp.Result, respResult)
if err != nil {
err = fmt.Errorf("[callAria2c]json.Unmarshal rpcResp.Resul error:%s, rawBody:%s", err, respData)
return err
}
return nil
}
var isAria2cRunning bool
func IsAria2cRunning() bool {
return isAria2cRunning
}
func hasAria2c() bool {
output, _ := exec.Command("hash", "aria2c").Output()
if len(output) == 0 {
return true
}
return false
}
func Aria2Worker(downloadDir string) (pid int) {
if hasAria2c() {
killCmd := exec.Command("sh")
killCmd.Stdin = strings.NewReader(fmt.Sprintf(`lsof -i :%d|grep LISTEN|awk '{printf $2"\n"}'|xargs -I {} kill -9 {}`, *aria2cPort))
err := killCmd.Run()
if err != nil {
log.Warnf("kill error:%s", err)
}
cmd := exec.Command("aria2c",
"--dir="+downloadDir,
"--enable-rpc",
fmt.Sprintf("--rpc-listen-port=%d", *aria2cPort),
"--rpc-listen-all=false",
// https://github.com/ngosang/trackerslist
"--bt-tracker=udp://tracker.skyts.net:6969/announce,udp://tracker.safe.moe:6969/announce,udp://tracker.piratepublic.com:1337/announce,udp://tracker.pirateparty.gr:6969/announce,udp://tracker.coppersurfer.tk:6969/announce,udp://tracker.leechers-paradise.org:6969/announce,udp://allesanddro.de:1337/announce,udp://9.rarbg.com:2710/announce,http://p4p.arenabg.com:1337/announce,udp://p4p.arenabg.com:1337/announce,udp://tracker.opentrackr.org:1337/announce,http://tracker.opentrackr.org:1337/announce,udp://public.popcorn-tracker.org:6969/announce,udp://tracker2.christianbro.pw:6969/announce,udp://tracker1.xku.tv:6969/announce,udp://tracker1.wasabii.com.tw:6969/announce,udp://tracker.zer0day.to:1337/announce,udp://tracker.mg64.net:6969/announce,udp://peerfect.org:6969/announce,udp://open.facedatabg.net:6969/announc")
output, err := cmd.StdoutPipe()
if err != nil {
log.Errorf("[Aria2Worker]cmd.StdoutPipe error:%s", err)
}
err = cmd.Start()
isAria2cRunning = true
if err != nil {
log.Errorf("[Aria2Worker]aria2c can not start, err:%s", err.Error())
isAria2cRunning = false
}
go func(output io.ReadCloser) {
defer func() {
if rec := recover(); rec != nil {
log.Errorf("[Aria2Worker]panic:%v", rec)
}
}()
// log aria2c stdout
scanner := bufio.NewScanner(output)
var outString string
for scanner.Scan() {
// 不能让空输出刷屏
outString = scanner.Text()
if strings.TrimSpace(outString) != "" {
log.Debugf("[aria2c][stdout]%s", outString)
}
}
cmd.Wait()
}(output)
return cmd.Process.Pid
} else {
log.Errorf("[Aria2Worker]aria2c not install, cannot download magnet")
}
return 0
}