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如何建立帶有多個進度條的 wget GUI？

tag-icon • tag-icon wget zenity
如何建立帶有多個進度條的 wget GUI？

我正在編寫自己的腳本來下載多個專案（同時，每個命令一個專案），wget並且我需要一個進度列。我目前使用zenity --progress進度條，但問題是下載時它會產生多個進度條。

我想要實現的是類似 Nautilus 中的檔案傳輸對話框：

Ubuntu 的檔案傳輸對話框

任何人都可以為我指出正確的方向，即哪種程式或語言可以實現這一目標。

筆記： 我只有 shell 腳本的基本知識，沒有太多其他知識。

答案1

使用 YAD 的解決方案

概述

Zenity 已經有一段時間沒有更新了。幸運的是有一個叫做亞德有很多附加功能。它尚未到達官方存儲庫，但您可以從 webupd8 PPA 安裝它：

sudo add-apt-repository ppa:webupd8team/y-ppa-manager
sudo apt-get update
sudo apt-get install yad

YAD 新增的功能之一是多​​進度條對話框。以下是 YAD 手冊中有關多個進度條的摘錄：

Multi progress bars dialog options
--bar=LABEL[:TYPE]
  Add progress bar. LABEL is a text label for progress bar. TYPE is a progress bar type. Types are:
  NORM for normal progress bar, RTL for inverted progress bar and PULSE for pulsate progress bar.
--vertical
  Set vertical orientation of progress bars.
--align=TYPE
  Set alignment of bar labels. Possible types are left, center or right. Default is left.

Initial values for bars set as extra arguments. Each lines with progress data passed to stdin must be started
from N: where N is a number of progress bar. Rest is the same as in progress dialog.

因此，一個非常簡單的具有多個進度條的腳本可能如下所示：

for i in {1..100}; do
   printf "1:$i\n2:$i\n3:$i\n"
   sleep 0.2
done | yad --multi-progress --bar="Bar 1":NORM --bar="Bar 2":NORM --bar="Bar 3":NORM

結果如下：

簡單的 yad 多進度腳本

我們可以使用以下命令為欄位新增描述#：

for i in {1..100}; do
   printf "1:$i\n2:$i\n3:$i\n"
   printf "1:#Progress 1 is at $i percent\n2:#Progress 2 is at $i percent\n3:#Progress 3 is at $i percent\n"
   sleep 0.2
done | yad --multi-progress --bar="Bar 1":NORM --bar="Bar 2":NORM --bar="Bar 3":NORM

結果：

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如果我們想在 wget 下載腳本中實現這一點，我們必須先做一些事情：

  • 找到一種方法從 wget 輸出中提取下載進度和其他有趣的數據
  • 找到一種迭代多個檔案的方法
  • 找到一種方法將我們擁有的所有資訊傳遞給一個 yad 對話框

我發現這個項目相當有趣，所以我坐下來編寫了一個應該完成上述所有操作的腳本。

亞德_wget

這是我想出來的：

#!/bin/bash

# NAME:         yad_wget
# VERSION:      0.2
# AUTHOR:       (c) 2014 Glutanimate
# DESCRIPTION:  graphical frontend to wget in form of a yad script
# FEATURES:     - display progress of multiple simultaneous downloads
#               - set maximum number of simultaneous downloads
# DEPENDENCIES: yad
#
#               Install yad on Ubuntu with:
#
#                   sudo add-apt-repository ppa:webupd8team/y-ppa-manager
#                   sudo apt-get update
#                   sudo apt-get install yad
#
# LICENSE:      GNU GPLv3 (http://www.gnu.de/documents/gpl-3.0.en.html)
#
# NOTICE:       THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. 
#               EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 
#               PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR 
#               IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
#               AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND 
#               PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE,
#               YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
#
#               IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY 
#               COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS 
#               PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, 
#               INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE 
#               THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED 
#               INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE 
#               PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER 
#               PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
#
# USAGE:        yad_wget <space-delimited URLs>
#               Closing the yad dialog will terminate all downloads in progress

# Variables and settings

MAXDLS="5" # set maximum number of simultaneous downloads

URILIST="$@" # gets list of URIs from stdin
USAGE="$0 <space-delimited URLs>"

# Set GUI variables up
TITLE="YAD wget downloader"                 # dialog title
TEXT="<b>Downloads</b> in progress:"        # dialog text
ICON="emblem-downloads"                     # window icon (appears in launcher)
IMAGE="browser-download"                    # window image (appears in dialog)

#URILIST="http://proof.ovh.net/files/100Mb.dat http://speedtest.wdc01.softlayer.com/downloads/test10.zip http://cachefly.cachefly.net/100mb.test"

# Usage checks

if [[ -z "$URILIST" ]]
  then
      echo "Error: No arguments provided"
      echo "Usage: $USAGE"
      exit 1
fi


# download file and extract progress, speed and ETA from wget
# we use sed regex for this
# source: http://ubuntuforums.org/showthread.php?t=306515&page=2&p=7455412#post7455412
# modified to work with different locales and decimal point conventions
download(){
    wget  "$1" 2>&1 | sed -u \
    "s/.* \([0-9]\+%\)\ \+\([0-9,.]\+.\) \(.*\)/$2:\1\n$2:# Downloading at \2\/s, ETA \3/"
    RET_WGET="${PIPESTATUS[0]}"             # get return code of wget
    if [[ "$RET_WGET" = 0 ]]                # check return code for errors
      then
          echo "$2:100%"
          echo "$2:#Download completed."
      else
          echo "$2:#Download error."
    fi
}


# compose list of bars for yad
for URI in $URILIST; do                     # iterate through all URIs
    FILENAME="${URI##*/}"                   # extract last field of URI as filename
    YADBARS="$YADBARS --bar=$FILENAME:NORM" # add filename to the list of URIs
done

IFS=" "
COUNTER="1"
DYNAMIC_COUNTER="1"

# main
# iterate through all URIs, download them in the background and 
# pipe all output simultaneously to yad
# source: http://pastebin.com/yBL2wjaY

for URI in $URILIST; do
    if [[ "$DYNAMIC_COUNTER" = "$MAXDLS" ]] # only download n files at a time
      then
          download "$URI" "$COUNTER"        # if limit reached wait until wget complete
          DYNAMIC_COUNTER="1"               # before proceeding (by not sending download() to bg)
      else
          download "$URI" "$COUNTER" &      # pass URI and URI number to download()
          DYNAMIC_COUNTER="$[$DYNAMIC_COUNTER+1]"
    fi
    COUNTER="$[$COUNTER+1]"                 # increment counter
done | yad --multi-progress --auto-kill $YADBARS --title "$TITLE" \
--text "$TEXT" --window-icon "$ICON" --image "$IMAGE"

# ↑ launch yad multi progress-bar window

這就是它的樣子：

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請務必閱讀所有評論，以了解腳本的工作原理，如果您有任何疑問，請隨時在下面的評論中提出。

編輯：

我添加了對設定最大同時下載數的支援。例如對於MAXDLS="5"：

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