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This guide explains how to troubleshoot common issues encountered during file uploads.

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File submission failed

File upload consists of three steps. For details, see Obtain file upload information.
  1. Obtain file upload information.
  2. Upload the file to OSS over HTTP.
  3. Submit the file.

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Confirm that step 2 (uploading the file to OSS) returns 200.

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Failed to upload file to OSS

Check your code. Replace <authorization>, <x-oss-date>, and <url> with the values returned by the file upload information API in step 1. Replace a.txt with an existing local file, then run the following command: 
curl -v -T a.txt \
--header "Authorization: <authorization>" \
--header "x-oss-date: <x-oss-date>" \
--url "<url>"
  • If curl returns the RequestTimeTooSkewed error, the upload information has expired. Obtain the file upload information again.
  • If curl returns 200, the issue is in your code. The documentation provides demos in the corresponding languages. Refer to the relevant sample to troubleshoot your code.
  • If your code upload returns SignatureDoesNotMatch, the HTTP request headers most likely include an extra contentType. Set it to empty explicitly. (You can print the request headers to inspect the contentType value.)
  • If curl does not return 200:
    • If a domain resolution failure or connection failure is reported, troubleshoot as follows:
      • ping <domain or IP>
      • telnet <domain or IP> 443
      • Connect to a mobile hotspot and run ping and telnet, or switch to another network and try again.
      • Disable the firewall on your computer, then run ping and telnet.
      • Contact your IT team to allowlist the OSS public domains. See Appendix I at the bottom of this document for the domain list.
      • For dedicated storage, contact the dedicated storage operations team to investigate network connectivity issues.

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Appendix I: OSS public domains

  • sz.trans.dingtalk.io
  • sh.trans.dingtalk.io
  • zjk.trans.dingtalk.io
  • lippi-space-zjk.oss-cn-zhangjiakou.aliyuncs.com
  • lippi-space-sh.oss-cn-shanghai.aliyuncs.com
  • lippi-space-sz.oss-cn-shenzhen.aliyuncs.com
  • cdn-zjk-trans.dingtalk.io
  • cdn-sh-trans.dingtalk.io
  • cdn-sz-trans.dingtalk.io