Bash脚本可从网站下载图形文件

Question

I'm trying to write bash script in Linux (Debian), that will be used for downloading graphic files from website given by user during start-up. I'm not sure if my code is correct but first problem is when i try to run my script with website eg http://www.bbc.com/ an error shows: http://www.bbc.com/ : invalid identifier . I even tried a simple website that has only a few JPG files. My next problem is to find out how to download files from .txt file where the images Internet adresses are included.

#!/bin/bash
# $1 - URL        $2 - new catalog name
read $1 $2
url=$1
fold=$2
mkdir -p $fold

if [$# -ne 3];
then
echo "Wrong command"
exit -1
fi

curl $url | grep -o -e "<img src=\".*\"+>" > img_list.txt |wc -l img_list.txt |  lin=${% *}

baseurl=$(echo $url | grep -o "https?://[a-z.]*"")
curl -s $url | egrep -o "<img src\=[^>]*>" | sed 's/<img src=\"\([^"]*\).*/\1/.*/\1/g' >  url_list.txt

sed -i "s|^/|$baseurl/|" url_list.txt
cd $fold;

what can I do next?

Answer 1

For download every image from the webpage I would to use:

mech-dump --absolute --images http://example.com | xargs -n1 curl -O

but this need to be installed the mech-dump command from the WWW::Mechanize package.

Using the list file

while read -r url folder
do
    mkdir -p "$folder" || exit 1
    (cd "$folder" && mech-dump --absolute --images "$url" | xargs -n1 curl -O)
done < list.txt

(assuming than no url nor folder containing a space).

Answer 2

an error shows: http://www.bbc.com/ : invalid identifier

Your use of read is wrong; change

read $1 $2
url=$1
fold=$2

to

read url fold

or decide to specify the arguments on the command line and omit only read $1 $2 .

Also, each operand in [ ] must be separated from the brackets; change

if [$# -ne 3];

to

if [ -z "$fold" ]