Caddy是一個Go寫的服務器軟件，官方的宣傳語“The HTTP/2 web server with automatic HTTPS”以及“Serve The Web Like It's 2016”簡明表達了這個軟件的優點和趨勢，它擁有基本的apache或者nginx有的web server模塊，同時還有一些很有特色的功能，比如:
HTTP/2
Automatic HTTPSMulti-coreWebsocketsMarkdownIPv6Git…...用Caddy我們就可以很方便的部署一個Markdown文本作為靜態網站訪問，或者它的Git指令完成代碼的自動化部署，當然它很大的特色就是它的語法非常簡潔，比nginx還要簡單，配置部署起來很方便，下面隨便舉幾個例子吧。對網站添加BasicAuth，用戶名ryan，密碼 12345
basicauth / ryan 12345
用CORS解決跨域問題
cors / {
origin http://allowedSite.com origin http://anotherSite.org https://anotherSite.org methods POST,PUT allow_credentials false max_age 3600 allowed_headers X-Custom-Header,X-Foobar exposed_headers X-Something-Special,SomethingElse}IP過濾
ipfilter / {
rule block ip 212.10.15.0-255 213.10.15.0-10 5.23.4.24 blockpage /local/data/default.html}HTTPS 配置
tls ../cert.pem ../key.pem實在太簡單了配置起來，具體還有其他簡潔到哭的指令可以看官方的User Guide，很快就刷完了。既然Caddy自動部署https,而且是通過Let's Encrypt，那么就實踐一下，本博客是用Ghost 搭建，Nginx代理的，現在就改用Caddy，并支持https，步驟大體如下：
證書申請請移步 Let's Encrypt
Caddy 安裝很簡單，直接下載 https://caddyserver.com/docs/getting-started配置Caddyfile，看起來指令簡潔明了https://www.yuansir-web.com, http://www.yuansir-web.com, http://yuansir-web.com { redir https://yuansir-web.com{uri} tls yuansir88@gmail.com}https://yuansir-web.com { gzip errors { log /var/log/caddy/yuansir-web.error.log { size 50 age 30 keep 5 } } log /var/log/caddy/yuansir-web.access.log tls yuansir88@gmail.com proxy / http://127.0.0.1:2368 { proxy_header X-Real-IP {remote} proxy_header HOST {host} proxy_header X-Forwarded-Proto {scheme} }}用supservisor來管理Caddy運行
[program:caddy]command=/usr/bin/caddy -conf="/var/www/Caddyfile"directory=/var/www ; directory to cwd to before exec (def no cwd)autostart=true ; start at supervisord start (default: true)autorestart=unexpected ; whether/when to restart (default: unexpected)startsecs=1 ; number of secs prog must stay running (def. 1)startretries=3 ; max # of serial start failures (default 3)exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)stopsignal=QUIT ; signal used to kill process (default TERM)stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)stopasgroup=false ; send stop signal to the UNIX process group (default false)user=www ; setuid to this UNIX account to run the programredirect_stderr=true ; redirect proc stderr to stdout (default false)stdout_logfile=/var/log/caddy.log ; stdout log path, NONE for none; default AUTOstderr_logfile=/var/log/caddyerr.log ; stderr log path, NONE for none; default AUTO
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