Curl has the best proxy support among many HTTP clients and download tools. This is how you use a socks5 proxy and also resolve hostname in the URL using the socks5 proxy. For some use case, resolving hostname via the proxy is essential.
Suppose you have a socks5 proxy running on localhost:8001.
In curl >= 7.21.7, you can use
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curl -x socks5h://localhost:8001 http://www.google.com/ |
In curl >= 7.18.0, you can use
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curl --socks5-hostname localhost:8001 http://www.google.com/ |
Many tools use libcurl internally or use curl command in their installer script. If it’s difficult to modify the command line itself, you can set proxy using environment variables.
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env ALL_PROXY=socks5h://localhost:8001 PROGRAM [OPTION]... |
If you want to overwrite system proxy settings, you may also need to set two more variables:
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env http_proxy=socks5h://localhost:8001 HTTPS_PROXY=socks5h://localhost:8001 ALL_PROXY=socks5h://localhost:8001 PROGRAM [OPTION]... |
Note that http_proxy is lower case, the other two is upper case.
