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Architect_Programmer_Code Agriculture Network»Architect › Front-end design & web › Html/CSS/JavaScript › Front-end HTML form uploads files directly to US3 (UFile) storage ...
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[HTML/HTML5] The front-end HTML form uploads files directly to the US3 (UFile) store

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Posted on 1/30/2026 9:28:02 AM | | | |
Requirements: The original file upload logic was that the frontend uploaded the file to the backend, and then the backend uploaded the file to the US3 storage. Files are now uploaded directly to UCloud's US3 object store via front-end forms.
.NET/C# operand storage US3 (UFile) storage
https://www.itsvse.com/thread-10807-1-1.html

Form Upload (PostFile) Document:https://docs.ucloud.cn/api/ufile-api/post_file

There are some bug descriptions in the documentation, and they are not very detailed, and it took a long time to test to get through.

The upload is as shown below:



HTML front-end code:
Generate signature code using C#:

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