Downloaded object content that differs from what you uploaded is caused by one of two things: DNS hijacking by your Internet Service Provider (ISP), or the object content being updated after you downloaded it.
Run ping on the download URL to determine which applies to you, then follow the corresponding steps below.
If the resolved IP address is not the OSS origin IP
Your request is not reaching the OSS origin server. This indicates DNS hijacking by your ISP.
Set your operating system's DNS servers to the following Alibaba public DNS addresses, which are designed to prevent DNS hijacking:
223.5.5.5223.6.6.6
After updating the DNS settings, test the download again to confirm the content is correct.
If the resolved IP address is the OSS origin IP
DNS resolution is correct. The mismatch is most likely a cached version of the object in your browser.
Clear your browser cache.
Download the object again and check whether the content matches.
If the content still differs after clearing the cache, the object was likely updated after you initially downloaded it. For objects that change frequently, include a version number in the object name — for example, use report-v2.csv instead of report.csv. Each update produces a new object name, which bypasses browser caches and avoids stale-content issues.
Applicable to
OSS