背景
在使用puppeteer进行访问页面的时候，有时候需要用到代理。
环境： centos 7
chrome 安装
puppeteer使用chrome。 参考chrome的命令行使用方式。 在官网中没看到说明，不过一般的执行文件都是支持help的。
在服务器上安装chrome ：
vim /etc/yum.repos.d/google-chrome.repo添加内容
[google-chrome]name=google-chrome
baseurl=http://dl.google.com/linux/chrome/rpm/stable/$basearch
enabled=1
gpgcheck=1
gpgkey=https://dl-ssl.google.com/linux/linux_signing_key.pub安装浏览器
yum -y install google-chrome-stable说明： yum search chrome 可以查看供安装的包
chrome 命令行代理
在shell中执行命令：
google-chrome -h即可看到所有的命令选项，其中 OPTION 下面有代理添加的介绍以及示例：
--proxy-server=host:port
Specify the HTTP/SOCKS4/SOCKS5 proxy server to use for requests.
This overrides any environment variables or settings picked via
the options dialog. An individual proxy server is specified
using the format: [<proxy-scheme>://]<proxy-host>[:<proxy-port>]
Where <proxy-scheme> is the protocol of the proxy server, and is
one of:
"http", "socks", "socks4", "socks5".
If the <proxy-scheme> is omitted, it defaults to "http". Also
note that "socks" is equivalent to "socks5".
Examples:
--proxy-server="foopy:99"
Use the HTTP proxy "foopy:99" to load all URLs.
--proxy-server="socks://foobar:1080"
Use the SOCKS v5 proxy "foobar:1080" to load all URLs.
--proxy-server="socks4://foobar:1080"
Use the SOCKS v4 proxy "foobar:1080" to load all URLs.
--proxy-server="socks5://foobar:66"
Use the SOCKS v5 proxy "foobar:66" to load all URLs.
It is also possible to specify a separate proxy server for dif‐
ferent URL types, by prefixing the proxy server specifier with a
URL specifier:
Example:
--proxy-server="https=proxy1:80;http=socks4://baz:1080"
Load https://* URLs using the HTTP proxy "proxy1:80". And
load http://*
URLs using the SOCKS v4 proxy "baz:1080".
--no-proxy-server
Disables the proxy server. Overrides any environment variables
or settings picked via the options dialog.
--proxy-auto-detect
Autodetect proxy configuration. Overrides any environment vari‐
ables or settings picked via the options dialog.
--proxy-pac-url=URL
Specify proxy autoconfiguration URL. Overrides any environment
