resumable upload default use v2

[YangSen-qn]

变更背景描述

jira issue链接

主要变更点

• fix bug
• new feature
• 不兼容变更

Checklist

• 已自测
• 已更新Readme

[gemini-code-assist]

Summary of Changes

Hello @YangSen-qn, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request standardizes the use of Resumable Upload API V2 by making it the default option for all relevant upload functionalities. This change simplifies the user experience by removing the need to explicitly enable V2 for resumable uploads and ensures that the system leverages the latest API version by default for improved performance or reliability.

Highlights

• Default Resumable Upload API Version: The default setting for using Resumable Upload API V2 has been changed from false to true across various upload commands.
• Command Line Flags Update: The --resumable-api-v2 flag in the upload, sync, and resumeUpload commands now defaults to true, and their help descriptions have been updated accordingly.
• Internal Configuration Change: The DefaultUploadConfig function now initializes ResumableAPIV2 to true, ensuring V2 is used by default in the underlying upload operations.

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[qiniu-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [YangSen-qn]

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[gemini-code-assist]

Code Review

本次代码变更将分片上传的默认 API 版本切换到了 v2。代码修改本身是正确的，但这一变更会影响现有测试用例的正确性，并且对于命令行用户来说是一个不兼容的变更。具体的反馈已在代码行评论中给出。

[xgopilot]

Code Review Summary

The code changes are well-implemented and consistent. However, documentation and configuration templates need updates to match the new default behavior.

✅ Approved: Code quality, security, and performance
⚠️ Action Required: Update documentation files before merging

[xgopilot]

Detailed Review Findings

✅ What's Good

Code Quality: All code changes are clean and consistent across the three affected commands (qupload2, sync, rput). The flag descriptions correctly document "default is true".

Security: No security concerns. Both v1 and v2 APIs use identical authentication mechanisms and data integrity validation. V2 actually includes MD5 checksums per part for improved integrity.

Performance: No concerns. The v2 API adds minimal overhead (one extra initialization call) but provides better session management and progress tracking.

⚠️ Issues to Address

The inline comments highlight inconsistencies between the code and supporting files that should be fixed before merging.