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每日壁纸脚本的 wget 图像问题

tag-icon • tag-icon grep scripting wget wallpaper
每日壁纸脚本的 wget 图像问题

我有一个脚本（努诺编写的），用于处理wget来自某个特定网站的图像并设置我的壁纸。但是我似乎无法修改它以便能够wget从该站点获取图像：铬铸

源中的图像具有如下 url：图像

我似乎无法隔离使用的网址，grep因为它很贪婪。我意识到grep -P可以工作，如果我在终端中手动输入它，它就可以工作。但在脚本中，当分配变量时，它不起作用。可以使用 来设置变量grep，但不能使用来设置grep -P。

#!/bin/bash
# * Name: earthwall.sh
# * Description: Downloads random image from earthview.withgoogle.com and sets as wallpaper on OSX
# * Author: Nuno Serro
# * Date: 09/07/2015 22:24:11 WEST
# * License: This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see      <http://www.gnu.org/licenses/>.
#
# * Copyright (c) 2015, Nuno Serro
#PID=$(pgrep gnome-session)
#PID=$(pgrep -f 'gnome-session' | head -n1)
#export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS     /proc/$PID/environ)

mkdir -p ~/Pictures/globewall
cd ~/Pictures/globewall

# Get page index
wget -q https://clients3.google.com/cast/chromecast/home -O ~/Pictures/globewall/.index.html 2> /dev/null
if [ $? -ne 0 ]; then
echo "Failed to get index from google chromecast"
exit 1
fi

# Set image url, name and location
image_url=`cat ~/Pictures/globewall/.index.html | grep lh3.googleusercontent.com | grep -shoP 'https:[\\][\/][\\][\/]lh3(.*?)-mv' -m 1 -o | head -1 | sed 's/\\//g' | sed 's/u003d/=/g'`
image_name= wallpaper.jpg

# Get image
wget -q $image_url -O ~/Pictures/globewall/$image_name 2> /dev/null
if [ $? -ne 0 ]; then
echo "Failed to get image from www.googleusercontent.com"
exit 1
fi

# Change wallpaper
sleep 1
/usr/bin/gsettings set org.gnome.desktop.background picture-options 'zoom'
/usr/bin/gsettings set org.gnome.desktop.background picture-uri "file://~/Pictures/globewall/$image_name"
/usr/bin/gsettings set org.gnome.desktop.screensaver picture-uri "file://~/Pictures/globewall/$image_name"

echo "Wallpaper changed to $image_name"
exit 0

我被困住了。

答案1

您的脚本需要进行一些修改。

该行后面的两行#Set image url, name and location由于各种原因被破坏（例如不正确的 grep 语法、不正确的赋值）。此外，您的脚本不会使用双引号文件名，这可能会根据情况破坏您的脚本。

为了使其工作更可靠，我重写了脚本的核心，如下所示：

#!/bin/bash
fn_basedir=~/Pictures/globewall/
fn_index='.index.html'
fn_image='wallpaper.jpg'

mkdir -p "$fn_basedir"

# Get page index
wget -q "https://clients3.google.com/cast/chromecast/home" -O "${fn_basedir}${fn_index}" 
if [ $? -ne 0 ]; then
  echo "Failed to get index from google chromecast"
  exit 1
fi

# Set image url
image_url=$(grep -oP 'https:\\/\\/lh3(.*?)-mv' "${fn_basedir}${fn_index}" | sed -e 's/\\//g' -e 's/u003d/=/g' | head -1)

# Get image
wget -q "$image_url" -O "${fn_basedir}${fn_image}" 
if [ $? -ne 0 ]; then
  echo "Failed to get image from www.googleusercontent.com"
  exit 1
fi

# Change wallpaper
sleep 1
/usr/bin/gsettings set org.gnome.desktop.background picture-options 'zoom'
/usr/bin/gsettings set org.gnome.desktop.background picture-uri "file://${fn_basedir}${fn_image}"
/usr/bin/gsettings set org.gnome.desktop.screensaver picture-uri "file://${fn_basedir}${fn_image}"

echo "Wallpaper changed to ${fn_image}"
exit 0

顺便说一句，很棒的图片！

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