The right thing to do (which is what everybody else does) is to just get the IE settings and assume that they're correct, since they almost always are. This function is used by Firefox and Opera to get their proxy settings by default, although you can override them per-browser. The function you're looking for is WinHttpGetIEProx圜onfigForCurrentUser(), which is documented at (VS.85).aspx. I know that I can probably read the values directly out of the appropriate registry locations if they are configured manually, but does this also work with "automatically detect proxy server?" Do I even have to bother with that option, or is it (almost) never used?īefore people start suggesting alternatives: I'm using C, so I'm limited to the Win32 API, and I really really want to keep using C and libcurl.Is there one set of "proxy settings" in Windows, used by all browsers (probably IE's), or would I have to write different routines for IE, Firefox, Opera, etc?.How do I go about this? More specifically: So I figure that I can find out whether to use a proxy by looking at IE's proxy settings. This will be true for even the most basic user because otherwise "their internet wouldn't work". So I thought, everyone's browser will usually already be set up properly, proxy configured and everything. My tool doesn't even have a config file, so the user would otherwise have to pass in the proxy settings on every command, or set an environment variable or somesuch - way too much hassle. I want to keep my tool as simple as possible however, and not have to burden the user with having to configure the proxy. Obviously, the downloading doesn't work when the user is behind a proxy server, because the proxy needs to be configured. I am writing a command-line tool for Windows that uses libcurl to download files from the internet.
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