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On systems with case insensitive environment variables there exists a +name clash between the CGI environment variables and the HTTP_PROXY e +nvironment variable normally picked up by env_proxy(). Because of thi +s HTTP_PROXY is not honored for CGI scripts. The CGI_HTTP_PROXY envir +onment variable can be used instead. 2001-03-14 Gisle Aas <gisle@ActiveState.com> Release 5.51 SECURITY FIX: If LWP::UserAgent::env_proxy is called in a CGI environment, the case-insensitivity when looking for "http_proxy" permits "HTTP_PROXY" to be found, but this can be trivially set by + the web client using the "Proxy:" header. The fix applied is that $ENV{HTTP_PROXY} is not longer honored for CGI scripts. The CGI_HTTP_PROXY environment variable can be used instead. Problem reported by Randal L. Schwartz. sub env_proxy { my ($self) = @_; my($k,$v); while(($k, $v) = each %ENV) { if ($ENV{REQUEST_METHOD}) { # Need to be careful when called in the CGI environment, as # the HTTP_PROXY variable is under control of that other guy. next if $k =~ /^HTTP_/; $k = "HTTP_PROXY" if $k eq "CGI_HTTP_PROXY"; } $k = lc($k); next unless $k =~ /^(.*)_proxy$/; $k = $1; if ($k eq 'no') { $self->no_proxy(split(/\s*,\s*/, $v)); } else { $self->proxy($k, $v); } } }

In reply to Re^2: Proxy with LWP by tachyon-II
in thread Proxy with LWP by Sixtease

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