optimize download

[YangSen-qn]

变更背景描述

当用户指定了下载域名，那么就仅使用用户指定的域名进行下载

jira issue链接

KODO-18923

主要变更点

• fix bug
• new feature
• 不兼容变更

Checklist

• 已自测
• 已更新Readme

[qiniu-bot]

Hi @YangSen-qn. Thanks for your PR.

I'm waiting for a qiniu member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[qiniu-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bachue, YangSen-qn

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• OWNERS [bachue]

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[codecov]

Codecov Report

Merging #401 (5d71747) into master (180cb0f) will decrease coverage by 0.11%.
Report is 9 commits behind head on master.
The diff coverage is 0.00%.

❗ Current head 5d71747 differs from pull request most recent head dd6e8ea. Consider uploading reports for the commit dd6e8ea to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #401      +/-   ##
==========================================
- Coverage   12.18%   12.07%   -0.11%     
==========================================
  Files          24       24              
  Lines        1116     1126      +10     
==========================================
  Hits          136      136              
- Misses        957      967      +10     
  Partials       23       23              

Files	Coverage Δ
iqshell/common/utils/utils.go	18.67% <0.00%> (-0.35%)	⬇️
iqshell/common/utils/crypto.go	0.00% <0.00%> (ø)
iqshell/common/utils/file.go	8.57% <0.00%> (-0.19%)	⬇️