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如何创建带有多个进度条的 wget GUI？

tag-icon • tag-icon wget zenity
如何创建带有多个进度条的 wget GUI？

我正在编写自己的脚本来下载多个项目（同时下载，每个命令一个项目），wget我需要一个进度条。我目前使用zenity --progress进度条，但问题是它在下载时会生成多个进度条。

我想要实现的是类似于 Nautilus 中的文件传输对话框的功能：

Ubuntu 的文件传输对话框

有人能指出正确的方向吗？哪种程序或语言可以实现这一目标。

笔记： 我只具备 shell 脚本的基本知识，其他的就不多了。

答案1

使用 YAD 的解决方案

概述

Zenity 已经有一段时间没有更新了。幸运的是，有一个名为亚德具有许多附加功能。它尚未到达官方存储库，但您可以从 webupd8 PPA 安装它：

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​​进度条对话框。以下是 YAD 手册中有关多进度条的摘录：

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，具有多个进度条的非常简单的脚本可能如下所示：

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

结果如下：

简单的 yad 多进度脚本

我们可以使用以下命令为条形图添加描述#：

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

结果：

在此处输入图片描述

如果我们想在 wget 下载脚本中实现这一点，我们首先必须做几件事：

  • 找到一种方法来从 wget 输出中提取下载进度和其他有趣的数据
  • 找到一种迭代多个文件的方法
  • 找到一种方法将我们拥有的所有信息传递到一个 yad 对话框中

我发现这个项目相当有趣，所以我坐下来编写了一个可以完成上述所有操作的脚本。

yad_wget

以下是我的想法：

#!/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

它看起来是这样的：

在此处输入图片描述

           在此处输入图片描述

请务必阅读所有评论以了解脚本的工作原理，如果您有任何疑问，请随时在下面的评论中提问。

编辑：

我添加了设置最大同时下载数量的支持。例如MAXDLS="5"：

在此处输入图片描述

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