Weixin (ilink): file upload fails — CDN returns empty params

[zzysgdhrrr-coder]

Environment

• cc-connect: v1.2.2-beta.4
• Platform: weixin (personal WeChat / ilink)
• OS: macOS Darwin 25.3.0
• Agent: Claude Code 2.1.87

Description

When using cc-connect send --file <path> on the weixin (ilink) platform, file upload fails. Both .txt and .docx files fail with the same error — the CDN upload endpoint returns empty parameters.

The agent correctly creates the file locally and attempts to send it via cc-connect send --file, but the ilink CDN upload step fails silently (returns empty/null params), so the file is never delivered to the user's WeChat.

Steps to Reproduce

1. Configure cc-connect with type = "weixin" and attachment_send = "on"
2. Ask the agent to create a file and send it via cc-connect send --file /path/to/file.txt
3. The command fails; file is not delivered to WeChat

Expected Behavior

The file should be uploaded to the ilink CDN and delivered to the user's WeChat chat.

Actual Behavior

CDN upload returns empty parameters. The file cannot be sent. Both .txt and .docx formats fail.

Notes

• ImageSender / FileSender are documented as implemented for the weixin platform
• attachment_send = "on" is correctly configured
• This appears to be an ilink gateway limitation rather than a cc-connect code issue

[github-actions]

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We'll review it as soon as possible. While waiting, please make sure:

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[zzysgdhrrr-coder]

Logs

Relevant error logs from ~/.cc-connect/logs/cc-connect.log:

time=2026-03-29T23:29:46.152+08:00 level=ERROR msg="platform send failed" platform=weixin error="weixin: send: weixin: sendMessage: ret=-2 errcode=0 errmsg=" content_len=54
time=2026-03-29T23:29:46.685+08:00 level=WARN msg="weixin: sendMessage declined by API" ret=-2 errcode=0 errmsg=""
time=2026-03-29T23:29:47.258+08:00 level=WARN msg="weixin: sendMessage declined by API" ret=-2 errcode=0 errmsg=""
time=2026-03-29T23:29:47.258+08:00 level=ERROR msg="platform send failed" platform=weixin error="weixin: send: weixin: sendMessage: ret=-2 errcode=0 errmsg=" content_len=142
time=2026-03-29T23:30:23.986+08:00 level=ERROR msg="platform send failed" platform=weixin error="weixin: send: weixin: sendMessage: ret=-2 errcode=0 errmsg=" content_len=134

The pattern is consistent: sendMessage returns ret=-2, errcode=0, errmsg="" for all file/attachment sends. Regular text messages work fine on the same session.

Tested with both .txt and .docx files — same error for both.

[chenhg5]

感谢反馈！

分析结论：
这是 ilink gateway/API 限制问题，不是 cc-connect 代码 bug。

cc-connect 已正确处理 upload_param 为空的情况（检测并返回错误），但 ilink API ilink/bot/getuploadurl 返回空的 upload_param，可能原因包括：

• 账户/账号权限限制
• 文件类型不支持
• CDN 配置问题

建议：

1. 确认 ilink gateway 配置是否支持文件上传功能
2. 检查 ilink API 文档了解 upload_param 返回条件
3. 联系 ilink 技术支持确认 CDN 上传功能是否可用

如果 ilink 确认支持文件上传但仍返回空参数，请提供更多信息以便进一步排查。

[zzysgdhrrr-coder]

感谢回复和分析！理解这是 ilink 侧的限制。

想再确认一下：其他用户使用 weixin (ilink) 平台时，文件/附件发送是正常的吗？还是说这是目前 ilink 的普遍限制？

我这边日常确实有通过微信发送文件的需求（比如 Claude 生成的文档回传），如果是已知限制的话，后续 ilink 支持文件上传后能否跟进适配？

再次感谢 🙏

[bbbbbbbbly]

好像是CDN的限制，我这边也让claude 发送文件，也回传不了了。上周测试是可以的，估计微信那边关了