github.com/fzfile/BaiduPCS-Go@v0.0.0-20200606205115-4408961cf336/requester/downloader/example.go (about)

     1  package downloader
     2  
     3  import (
     4  	"fmt"
     5  	"github.com/fzfile/BaiduPCS-Go/pcsutil/converter"
     6  	"github.com/fzfile/BaiduPCS-Go/requester/transfer"
     7  	"io"
     8  	"os"
     9  )
    10  
    11  // DoDownload 执行下载
    12  func DoDownload(durl string, savePath string, cfg *Config) {
    13  	var (
    14  		file   *os.File
    15  		writer io.WriterAt
    16  		err    error
    17  	)
    18  
    19  	if savePath != "" {
    20  		writer, file, err = NewDownloaderWriterByFilename(savePath, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0666)
    21  		if err != nil {
    22  			fmt.Println(err)
    23  			return
    24  		}
    25  		defer file.Close()
    26  	}
    27  
    28  	download := NewDownloader(durl, writer, cfg)
    29  
    30  	exitDownloadFunc := make(chan struct{})
    31  
    32  	download.OnDownloadStatusEvent(func(status transfer.DownloadStatuser, workersCallback func(RangeWorkerFunc)) {
    33  		var ts string
    34  		if status.TotalSize() <= 0 {
    35  			ts = converter.ConvertFileSize(status.Downloaded(), 2)
    36  		} else {
    37  			ts = converter.ConvertFileSize(status.TotalSize(), 2)
    38  		}
    39  
    40  		fmt.Printf("\r ↓ %s/%s %s/s in %s ............",
    41  			converter.ConvertFileSize(status.Downloaded(), 2),
    42  			ts,
    43  			converter.ConvertFileSize(status.SpeedsPerSecond(), 2),
    44  			status.TimeElapsed(),
    45  		)
    46  	})
    47  
    48  	err = download.Execute()
    49  	close(exitDownloadFunc)
    50  	if err != nil {
    51  		fmt.Printf("err: %s\n", err)
    52  	}
    53  }