同学写了个上传文件的网站：share 用于解决linux下QQ传文件的问题。我突发奇想，做一命令行下的share客户端。完整代码见share-terminal
需要用到:
- zsh
- xmllint
- curl
- wget
首先网站地址是：https://share.whoisnian.com，准备从服务器上拉取文件列表，存在本地/tmp/share.list，下载的时候可以快速补全文件名，创建一个名为share的bash脚本：
url="https://share.whoisnian.com" |
同步列表
首先编写第一个功能，同步远端文件列表到本地：function _shareSync() {
echo "local file list synchronizing....."
(curl $url | \
xmllint --html --xpath \
'//a[@class="maxlen"]/text()' \
--noout 2>/dev/null - \
) > $localList
echo "Done."
}
这里先用curl获得html代码，然后用管道传输给xmllint，用--xpath解析出class是”maxlen”的链接标签的文本，也就是文件名。用--noout 2>/dev/null取消报错输出，把最终结果也就是文件列表，存入/tmp/share.list
这个临时文件内容是这样：$ cat /tmp/share.list
Screenshot_2020-02-05-20-28-47.jpg
beijing_all_20200101.csv
统计学习方法.pdf
trpl-zh-cn.pdf
Wallpaper.jpg
Proxy-SwitchyOmega-Chromium-2.5.15.crx
Shadowsocks-Qt5-3.0.1-x86_64.AppImage
macOSPublicBetaAccessUtility.dmg
jmeter.png
深入浅出React和Redux (实战).pdf
IdeaProjects.rar
下载
下载文件就是按照”https://share.whoisnian.com/upload/"+文件名的链接，直接用`wget`下载function _shareDownload() {
href=$url"/upload/"$1
echo "href: "$href
wget $href
}
删除
删除文件需要传入POST参数”submit=delete”和”name=文件名”，用curl模拟POSTfunction _shareDelete() {
echo "delete: "$1
curl -s $url"/index.php" \
-X POST \
-d "name="$1"&submit=delete" \
> /dev/null
_shareSync
}
上传
上传文件，需要传入文件和”submit=upload”参数function _shareUpload() {
echo "upload: "$1
curl \
-F "file[]=@"$1 \
-F "submit=upload" \
$url"/index.php" > /dev/null
}
命令行参数
最后写做一下提示功能和命令行参数识别：function help() {
echo "Usage: share [option] <filename>"
echo "Options:"
echo " sync: update local file list from server"
echo " ls: show files from local list"
echo " d: download file"
echo " u: upload local file"
echo " del: delete file from server"
echo "Example:"
echo " share d myfile.txt"
}
if [[ $1 == "sync" ]]; then #synchronize list
_shareSync
elif [[ $1 == "ls" ]]; then #local lost
_shareList
elif [[ $1 == "d" ]]; then #download
if [[ $2 == "" ]]; then
echo "filename required"
else
_shareDownload $2
fi
elif [[ $1 == "u" ]]; then
_shareUpload $2
elif [[ $1 == "del" ]]; then
if [[ $2 == "" ]]; then
echo "filename required"
else
_shareDelete $2
fi
elif [[ $1 == "help" ]]; then
help
elif [[ $1 == "" ]]; then
help
else
echo "unknown option: "$1" sh ,see usage:\"share help\""
fi
自动补全
如果就做到上述的，已经能用了，但是需要手动输入文件名，很麻烦，习惯摁Tab的我当然要实现自动补全。
自动补全需要在shell中配置complete，创建一个bash.rc用于存放自动补全的配置
function _share() { |
在~/.zshrc中把share加入环境变量$PATH，并source bash.rc就可以了，效果如下：╭─xuranus@Thanos ~
╰─$ share d
beijing_all_20200101.csv macOSPublicBetaAccessUtility.dmg Shadowsocks-Qt5-3.0.1-x86_64.AppImage 深入浅出React和Redux
IdeaProjects.rar Proxy-SwitchyOmega-Chromium-2.5.15.crx trpl-zh-cn.pdf 统计学习方法.pdf
jmeter.png Screenshot_2020-02-05-20-28-47.jpg Wallpaper.jpg
输入share后按Tab可以补全option，如果option是d，则按Tab补全文件名。
需要注意的是：bash和zsh的语法略有差异，根据你的环境需要区别对开。zsh下如果出现command not found:complete,需要在~/.zshrc头加入：autoload bashcompinit
bashcompinit
最后试试使用效果：╭─xuranus@Thanos ~
╰─$ share sync 130 ↵
local file list synchronizing.....
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 10098 0 10098 0 0 1315 0 --:--:-- 0:00:07 --:--:-- 2237
Done.
╭─xuranus@Thanos ~
╰─$ share ls
Screenshot_2020-02-05-20-28-47.jpg
beijing_all_20200101.csv
统计学习方法.pdf
trpl-zh-cn.pdf
Wallpaper.jpg
Proxy-SwitchyOmega-Chromium-2.5.15.crx
Shadowsocks-Qt5-3.0.1-x86_64.AppImage
macOSPublicBetaAccessUtility.dmg
jmeter.png
IdeaProjects.rar
╭─xuranus@Thanos ~
╰─$ share d 统计学习方法.pdf
href: https://share.whoisnian.com/upload/统计学习方法.pdf
--2020-02-21 10:46:59-- https://share.whoisnian.com/upload/%E7%BB%9F%E8%AE%A1%E5%AD%A6%E4%B9%A0%E6%96%B9%E6%B3%95.pdf
Loaded CA certificate '/etc/ssl/certs/ca-certificates.crt'
Resolving share.whoisnian.com (share.whoisnian.com)... 45.77.145.72, 2001:19f0:5:6c2a:5400:2ff:fe1b:7404
Connecting to share.whoisnian.com (share.whoisnian.com)|45.77.145.72|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 18415263 (18M) [application/pdf]
Saving to: ‘统计学习方法.pdf’
统计学习方法.pdf 100%[====================================================================================================================>] 17.56M 819KB/s in 49s
2020-02-21 10:47:52 (369 KB/s) - ‘统计学习方法.pdf’ saved [18415263/18415263]
╭─xuranus@Thanos ~/Downloads
╰─$ share u shiyan.json
upload: shiyan.json
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 25313 0 10797 100 14516 3591 4829 0:00:03 0:00:03 --:--:-- 8420
╭─xuranus@Thanos ~
╰─$ share del shiyan.json
delete: shiyan.json
local file list synchronizing.....
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 10098 0 10098 0 0 11108 0 --:--:-- --:--:-- --:--:-- 11096
Done.