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core.go
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core.go
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package net
import (
"crypto/tls"
"fmt"
"io"
"mime"
"net"
"net/http"
"net/http/cookiejar"
"os"
"os/signal"
"path"
"path/filepath"
"strings"
"sync"
"syscall"
"time"
cio "github.com/openbiox/ligo/io"
"github.com/openbiox/ligo/net/hget"
mpb "github.com/vbauerster/mpb/v7"
"github.com/vbauerster/mpb/v7/decor"
)
// HTTPGetURLs can use golang http.Get and external commandline tools including wget, curl, axel, git and rsync
// to query URL with progress bar
func HTTPGetURLs(urls []string, destDir []string, opt *Params) (destFns []string) {
sem := make(chan bool, opt.Thread)
newOpt := *opt
if len(urls) > 1 && opt.Thread > 1 && opt.Engine != "simplego" && opt.Engine != "default" {
newOpt.Quiet = true
}
wg := sync.WaitGroup{}
destMap := make(map[string]string)
wg.Add(len(urls))
for j := range urls {
url := urls[j]
dest := destDir[j]
go func(url, dest string) {
filename := FormatURLfileName(url, newOpt.RemoteName, newOpt.Timeout, newOpt.Proxy)
lock.Lock()
destMap[url] = path.Join(dest, filename)
lock.Unlock()
wg.Done()
}(url, dest)
}
wg.Wait()
for k, v := range destMap {
log.Infof("Trying %s => %s", k, v)
}
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT)
for j := range urls {
cio.CreateDir(destDir[j])
destFn := destMap[urls[j]]
if newOpt.Overwrite {
err := os.RemoveAll(destFn)
if err != nil {
log.Warnf("Can not remove %s.", destFn)
}
}
hasStFn, _ := cio.PathExists(destFn + ".st")
if hasDestFn, _ := cio.PathExists(destFn); hasStFn || !hasDestFn || newOpt.Ignore {
url := urls[j]
sem <- true
go func(url string, destFn string, signalChan chan os.Signal) {
time.Sleep(2 * time.Second)
err := AsyncURL2(url, destFn, &newOpt)
if err == nil {
destFns = append(destFns, destFn)
}
defer func() {
select {
case <-signalChan:
//send par number of interrupt for each routine
time.Sleep(2 * time.Second)
os.Exit(130)
case <-sem:
return
}
}()
}(url, destFn, signalChan)
} else {
destFns = append(destFns, destFn)
log.Infof("%s existed.", destFn)
}
}
for i := 0; i < cap(sem); i++ {
sem <- true
}
opt.Pbar.Wait()
return destFns
}
// NewHTTPClient create http.Client with timeout, proxy, and gCurCookieJar
func NewHTTPClient(timeout int, proxy string) *http.Client {
transPort := &http.Transport{
Dial: (&net.Dialer{
Timeout: time.Duration(timeout) * time.Second,
}).Dial,
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
if proxy != "" {
urlproxy, _ := RandProxy(proxy)
transPort.Proxy = http.ProxyURL(urlproxy)
}
return &http.Client{
CheckRedirect: defaultCheckRedirect,
Jar: gCurCookieJar,
Transport: transPort,
}
}
// HTTPGetURL can use golang http.Get to query URL with progress bar
func HTTPGetURL(url string, destFn string, opt *Params) error {
client := NewHTTPClient(opt.Timeout, opt.Proxy)
req, err := http.NewRequest("GET", url, nil)
req.Header.Set("Connection", "keep-alive")
req.Header.Set("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36")
if err != nil {
// handle error
log.Warn(err)
return err
}
gCurCookies = gCurCookieJar.Cookies(req.URL)
hget.SciencedirectassetsRed(url, req, client)
var t int
var success = false
for t = 0; t < opt.Retries; t++ {
err = downloadWorker(client, req, url, destFn, opt)
if err == nil {
success = true
break
} else {
filler := makeLogBar(fmt.Sprintf("Failed to retrive on attempt %d...", t+1))
opt.Pbar.Add(0, filler).SetTotal(0, true)
//filler = makeLogBar(fmt.Sprintf("error: %v", err))
//opt.Pbar.Add(0, filler).SetTotal(0, true)
filler = makeLogBar(fmt.Sprintf("retrying after %d seconds.", opt.RetSleepTime))
opt.Pbar.Add(0, filler).SetTotal(0, true)
time.Sleep(time.Duration(opt.RetSleepTime) * time.Second)
}
}
if !success {
return err
}
return nil
}
// ParseOutfnFromHeader get filename from response header
func ParseOutfnFromHeader(outfn string, resp *http.Response, useRemoteName bool) string {
contentDis := resp.Header.Get("Content-Disposition")
if outfn == "" && contentDis != "" && useRemoteName &&
strings.Contains(contentDis, "filename") {
_, params, err := mime.ParseMediaType(contentDis)
if err != nil {
log.Warn(err)
} else {
outfn = params["filename"]
}
}
return outfn
}
// AsyncURL can access URL via using external commandline tools including
// wget, curl, axel, git and rsync
func AsyncURL(url string, destFn string, opt *Params) error {
if opt.Mirror != "" {
if !strings.HasSuffix(opt.Mirror, "/") {
opt.Mirror = opt.Mirror + "/"
}
url = opt.Mirror + filepath.Base(url)
}
gitEngine := checkGitEngine(url)
engine := opt.Engine
if gitEngine == "git" {
engine = "git"
} else if gitEngine == "hg" {
engine = "hg"
}
if engine == "wget" {
return Wget(url, destFn, opt)
} else if engine == "curl" {
return Curl(url, destFn, opt)
} else if engine == "axel" {
return Axel(url, destFn, opt)
} else if engine == "rsync" {
return Rsync(url, destFn, opt)
} else if engine == "git" {
return Git(url, destFn, opt)
} else if engine == "hg" {
return Hg(url, destFn, opt)
}
log.Infof("Not found valid download engine name.")
return nil
}
// AsyncURL2 can access URL via using golang http library (with mbp progress bar) and
// external commandline tools including wget, curl, axel, git and rsync
func AsyncURL2(url string, destFn string, opt *Params) error {
engine := opt.Engine
gitEngine := checkGitEngine(url)
if gitEngine == "git" {
engine = "git"
} else if gitEngine == "hg" {
engine = "hg"
}
if engine == "simplego" {
if opt.Mirror != "" {
if !strings.HasSuffix(opt.Mirror, "/") {
opt.Mirror = opt.Mirror + "/"
}
url = opt.Mirror + filepath.Base(url)
}
return HTTPGetURL(url, destFn, opt)
} else if engine == "default" {
return hgetRetry(url, destFn, opt)
}
return AsyncURL(url, destFn, opt)
}
func hgetRetry(url string, destFn string, opt *Params) (err error) {
mode := ""
hasDest, _ := cio.PathExists(destFn)
hasState, _ := cio.PathExists(destFn + ".st")
if hasState {
mode = "resume"
} else if hasDest && !opt.Overwrite {
log.Infof("%s existed.", destFn)
return nil
}
var t int
var success = false
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT,
syscall.SIGKILL)
var wg sync.WaitGroup
for t = 0; t < opt.Retries; t++ {
wg.Add(1)
go func() {
defer func() {
select {
case <-signalChan:
time.Sleep(2 * time.Second)
os.Exit(130)
return
}
}()
time.Sleep(1 * time.Second)
err = hget.Pull(url, destFn, !opt.Quiet, opt.ThreadQuery, mode, opt.Timeout, opt.Proxy, opt.Pbar)
wg.Done()
}()
wg.Wait()
if err == nil {
success = true
break
} else {
filler := makeLogBar(fmt.Sprintf("Failed to retrive on attempt %d...", t+1))
opt.Pbar.Add(0, filler).SetTotal(0, true)
//filler = makeLogBar(fmt.Sprintf("error: %v", err))
//opt.Pbar.Add(0, filler).SetTotal(0, true)
filler = makeLogBar(fmt.Sprintf("retrying after %d seconds.", opt.RetSleepTime))
opt.Pbar.Add(0, filler).SetTotal(0, true)
time.Sleep(time.Duration(opt.RetSleepTime) * time.Second)
}
}
if !success {
return err
}
return nil
}
// AsyncURL3 can access URL via using golang http library (with mbp progress bar) and
// external commandline tools including wget, curl, axel, git and rsync
func AsyncURL3(url string, destFn string, opt *Params) (err error) {
engine := opt.Engine
gitEngine := checkGitEngine(url)
if gitEngine == "git" {
engine = "git"
} else if gitEngine == "hg" {
engine = "hg"
}
if engine == "simplego" {
if opt.Mirror != "" {
if !strings.HasSuffix(opt.Mirror, "/") {
opt.Mirror = opt.Mirror + "/"
}
url = opt.Mirror + filepath.Base(url)
}
err = HTTPGetURL(url, destFn, opt)
opt.Pbar.Wait()
} else {
err = AsyncURL(url, destFn, opt)
}
return nil
}
func makeLogBar(msg string) mpb.BarFiller {
return mpb.BarFillerFunc(func(w io.Writer, _ int, _ decor.Statistics) {
fmt.Fprintf(w, msg)
})
}
func init() {
gCurCookies = nil
//var err error;
gCurCookieJar, _ = cookiejar.New(nil)
}