Add no-proxy flags for downloading files

[LinuxSuRen]

No description provided.

[codecov]

Codecov Report

Merging #283 (aeaa4d8) into master (0f6cfe2) will increase coverage by 5.68%.
The diff coverage is 76.78%.

@@            Coverage Diff             @@
##           master     #283      +/-   ##
==========================================
+ Coverage   34.66%   40.34%   +5.68%     
==========================================
  Files          30       29       -1     
  Lines        2002     2015      +13     
==========================================
+ Hits          694      813     +119     
+ Misses       1277     1167     -110     
- Partials       31       35       +4     

Flag	Coverage Δ
unittests	40.34% <76.78%> (+5.68%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/common/util.go	33.33% <ø> (ø)
pkg/net/http.go	79.83% <70.45%> (+35.13%)	⬆️
cmd/get.go	74.83% <100.00%> (+6.52%)	⬆️
cmd/install.go	34.46% <100.00%> (+0.28%)	⬆️
pkg/net/progress.go	68.57% <0.00%> (+2.85%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.