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选题: How to use curl command with proxy username/password on Linux/ Unix
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translating by lujun9972
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How to use curl command with proxy username/password on Linux/ Unix
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======
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My sysadmin provided me the following proxy details:
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```
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IP: 202.54.1.1
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Port: 3128
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Username: foo
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Password: bar
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```
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The settings worked perfectly with Google Chrome and Firefox browser. How do I use it with the curl command? How do I tell the curl command to use my proxy settings from Google Chrome browser?
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Many Linux and Unix command line tools such as curl command, wget command, lynx command, and others; use the environment variable called http_proxy, https_proxy, ftp_proxy to find the proxy details. It allows you to connect text based session and applications via the proxy server with or without a userame/password. T **his page shows how to perform HTTP/HTTPS requests with cURL cli using PROXY server.**
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## Unix and Linux curl command with proxy syntax
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The syntax is:
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```
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## Set the proxy address of your uni/company/vpn network ##
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export http_proxy=http://your-ip-address:port/
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## http_proxy with username and password
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export http_proxy=http://user:password@your-proxy-ip-address:port/
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## HTTPS version ##
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export https_proxy=https://your-ip-address:port/
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export https_proxy=https://user:password@your-proxy-ip-address:port/
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```
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Another option is to pass the -x option to the curl command. To use the specified proxy:
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```
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curl -x <[protocol://][user:password@]proxyhost[:port]> url
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--proxy <[protocol://][user:password@]proxyhost[:port]> url
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--proxy http://user:password@Your-Ip-Here:Port url
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-x http://user:password@Your-Ip-Here:Port url
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```
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## Linux use curl command with proxy
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First set the http_proxy:
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```
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## proxy server, 202.54.1.1, port: 3128, user: foo, password: bar ##
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export http_proxy=http://foo:bar@202.54.1.1:3128/
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export https_proxy=$http_proxy
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## Use the curl command ##
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curl -I https://www.cyberciti.biz
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curl -v -I https://www.cyberciti.biz
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```
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Sample outputs:
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```
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* Rebuilt URL to: www.cyberciti.biz/
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* Trying 202.54.1.1...
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* Connected to 1202.54.1.1 (202.54.1.1) port 3128 (#0)
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* Proxy auth using Basic with user 'foo'
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> HEAD HTTP://www.cyberciti.biz/ HTTP/1.1
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> Host: www.cyberciti.biz
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> Proxy-Authorization: Basic x9VuUml2xm0vdg93MtIz
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> User-Agent: curl/7.43.0
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> Accept: */*
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> Proxy-Connection: Keep-Alive
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>
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< HTTP/1.1 200 OK
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HTTP/1.1 200 OK
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< Server: nginx
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Server: nginx
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< Date: Sun, 17 Jan 2016 11:49:21 GMT
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Date: Sun, 17 Jan 2016 11:49:21 GMT
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< Content-Type: text/html; charset=UTF-8
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Content-Type: text/html; charset=UTF-8
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< Vary: Accept-Encoding
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Vary: Accept-Encoding
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< X-Whom: Dyno-l1-com-cyber
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X-Whom: Dyno-l1-com-cyber
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< Vary: Cookie
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Vary: Cookie
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< Link: <http://www.cyberciti.biz/wp-json/>; rel="https://api.w.org/"
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Link: <http://www.cyberciti.biz/wp-json/>; rel="https://api.w.org/"
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< X-Frame-Options: SAMEORIGIN
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X-Frame-Options: SAMEORIGIN
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< X-Content-Type-Options: nosniff
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X-Content-Type-Options: nosniff
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< X-XSS-Protection: 1; mode=block
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X-XSS-Protection: 1; mode=block
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< X-Cache: MISS from server1
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X-Cache: MISS from server1
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< X-Cache-Lookup: MISS from server1:3128
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X-Cache-Lookup: MISS from server1:3128
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< Connection: keep-alive
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Connection: keep-alive
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<
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* Connection #0 to host 10.12.249.194 left intact
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```
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In this example, I'm downloading a pdf file:
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```
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$ export http_proxy="vivek:myPasswordHere@10.12.249.194:3128/"
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$ curl -v -O http://dl.cyberciti.biz/pdfdownloads/b8bf71be9da19d3feeee27a0a6960cb3/569b7f08/cms/631.pdf
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```
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OR use the -x option:
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```
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curl -x 'http://vivek:myPasswordHere@10.12.249.194:3128' -v -O https://dl.cyberciti.biz/pdfdownloads/b8bf71be9da19d3feeee27a0a6960cb3/569b7f08/cms/631.pdf
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```
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Sample outputs:
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[![Fig.01: curl in action \(click to enlarge\)][1]][2]
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## How to use the specified proxy server with curl on Unix
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```
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$ curl -x http://prox_server_vpn:3128/ -I https://www.cyberciti.biz/faq/howto-nginx-customizing-404-403-error-page/
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```
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## How to use socks protocol?
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The syntax is same:
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```
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curl -x socks5://[user:password@]proxyhost[:port]/ url
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curl --socks5 192.168.1.254:3099 https://www.cyberciti.biz/
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```
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## How do I configure and setup curl to permanently use a proxy connection?
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Update/edit your ~/.curlrc file using a text editor such as vim:
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`$ vi ~/.curlrc`
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Append the following:
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```
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proxy = server1.cyberciti.biz:3128
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proxy-user = "foo:bar"
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```
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Save and close the file. Another option is create a bash shell alias in your ~/.bashrc file:
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```
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## alias for curl command
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## set proxy-server and port, the syntax is
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## alias curl="curl -x {your_proxy_host}:{proxy_port}"
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alias curl = "curl -x server1.cyberciti.biz:3128"
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```
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Remember, the proxy string can be specified with a protocol:// prefix to specify alternative proxy protocols. Use socks4://, socks4a://, socks5:// or socks5h:// to request the specific SOCKS version to be used. No protocol specified, http:// and all others will be treated as HTTP proxies. If the port number is not specified in the proxy string, it is assumed to be 1080. The -x option overrides existing environment variables that set the proxy to use. If there's an environment variable setting a proxy, you can set proxy to "" to override it. See curl command man page [here for more info][3].
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--------------------------------------------------------------------------------
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via: https://www.cyberciti.biz/faq/linux-unix-curl-command-with-proxy-username-password-http-options/
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作者：[Vivek Gite][a]
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译者：[lujun9972](https://github.com/lujun9972)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://www.cyberciti.biz
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[1]:https://www.cyberciti.biz/media/new/faq/2016/01/curl-download-output-300x141.jpg
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[2]:https://www.cyberciti.biz//www.cyberciti.biz/media/new/faq/2016/01/curl-download-output.jpg
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[3]:https://curl.haxx.se/docs/manpage.html
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