[R] `install.packages()` and https proxy with R 4.5

[Jan van der Laan]

On 30-09-2025 17:49, Jeroen Ooms wrote:
> On Sun, Sep 28, 2025 at 10:45 AM Lukas Schneiderbauer
> <lukas.schneiderbauer using gmail.com> wrote:
>>
>> Hi all,
>>
>> I work from a Windows 11 environment behind a firewall, and I require proxy
>> settings to reach the (private) R package repository I work with.
>> Using R 4.4 I used to set the environment variable "https_proxy" which led
>> to e.g. "install.packages()" to work just fine.
> 
> 
> Maybe also try some of the other variables mentioned in
> https://curl.se/libcurl/c/libcurl-env.html


That documentation mentions that 'http_proxy' is used for 'https://' 
addresses. Is that variable also set?


I could also be that the proxy requires authentication with wininet this 
is often automatically done (I believe that was de default before R4.5). 
However, that doesn't explain why `method="curl"` would work. In that 
case you could try to set the proxy to `http_proxy=":@yourproxy"`.

HTH,
Jan



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