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API interface for viewing file information #8342

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opened 2026-02-21 18:25:10 -05:00 by yindo · 3 comments
yindo commented 2026-02-21 18:25:10 -05:00
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Originally created by @948024326 on GitHub (Feb 17, 2025).

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I uploaded the file through the upload interface and obtained the file ID and other information. These files are all stored in the database. I would like to ask if there is an API interface that can retrieve the information of a certain file through the file ID? thanks a lot for answering

Originally created by @948024326 on GitHub (Feb 17, 2025). ### Self Checks - [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones. - [x] I confirm that I am using English to submit report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:） - [x] Please do not modify this template :) and fill in all the required fields. ### Provide a description of requested docs changes ![Image](https://github.com/user-attachments/assets/24fda873-67fc-45bc-8ec4-1be6fceb509e) I uploaded the file through the upload interface and obtained the file ID and other information. These files are all stored in the database. I would like to ask if there is an API interface that can retrieve the information of a certain file through the file ID? thanks a lot for answering
yindo closed this issue 2026-02-21 18:25:10 -05:00
yindo commented 2026-02-21 18:25:10 -05:00
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@dosubot[bot] commented on GitHub (Feb 17, 2025):

Yes, there is an API interface that can retrieve the information of a certain file through the file ID. The FileService class provides a method get_file_generator_by_file_id that takes a file_id, timestamp, nonce, and sign as parameters. This method verifies the file using the file_helpers.verify_file_signature function and retrieves the file information from the database. If the file is found and the signature is valid, it loads the file from storage and returns a generator along with the file details. Additionally, the FileService class offers methods like get_file_preview and get_image_preview to retrieve file previews and image previews using the file ID [1][2][3][4].

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@dosubot[bot] commented on GitHub (Feb 17, 2025): <!-- Answer --> Yes, there is an API interface that can retrieve the information of a certain file through the file ID. The `FileService` class provides a method `get_file_generator_by_file_id` that takes a `file_id`, `timestamp`, `nonce`, and `sign` as parameters. This method verifies the file using the `file_helpers.verify_file_signature` function and retrieves the file information from the database. If the file is found and the signature is valid, it loads the file from storage and returns a generator along with the file details. Additionally, the `FileService` class offers methods like `get_file_preview` and `get_image_preview` to retrieve file previews and image previews using the file ID <sup>[[1]](https://github.com/langgenius/dify/blob/main/api/controllers/files/tool_files.py)</sup><sup>[[2]](https://github.com/langgenius/dify/blob/main/api/core/tools/tool_file_manager.py)</sup><sup>[[3]](https://github.com/langgenius/dify/blob/main/api/services/file_service.py)</sup><sup>[[4]](https://github.com/langgenius/dify/blob/main/api/controllers/files/image_preview.py)</sup>. <!-- Dosu Comment Footer --> *To continue talking to [Dosu](https://dosu.dev), mention @dosu.* --- <sup>Help Dosu learn! Give it feedback: [Great Response](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=great_response) | [Irrelevant Answer](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=irrelevant_answer) | [Incorrect Sources](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=incorrect_sources) | [Too Verbose](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=hallucination) | [Bug Report](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=bug_report) | [Other](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=other)</sup>
yindo commented 2026-02-21 18:25:10 -05:00
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@948024326 commented on GitHub (Feb 17, 2025):

Yes, there is an API interface that can retrieve the information of a certain file through the file ID. The FileService class provides a method get_file_generator_by_file_id that takes a file_id, timestamp, nonce, and sign as parameters. This method verifies the file using the file_helpers.verify_file_signature function and retrieves the file information from the database. If the file is found and the signature is valid, it loads the file from storage and returns a generator along with the file details. Additionally, the FileService class offers methods like get_file_preview and get_image_preview to retrieve file previews and image previews using the file ID [1][2][3][4].

To continue talking to Dosu, mention @dosu.

Help Dosu learn! Give it feedback: Great Response | Irrelevant Answer | Incorrect Sources | Too Verbose | Hallucination | Bug Report | Other

what? i mean, is there a certain api address?

@948024326 commented on GitHub (Feb 17, 2025): > Yes, there is an API interface that can retrieve the information of a certain file through the file ID. The `FileService` class provides a method `get_file_generator_by_file_id` that takes a `file_id`, `timestamp`, `nonce`, and `sign` as parameters. This method verifies the file using the `file_helpers.verify_file_signature` function and retrieves the file information from the database. If the file is found and the signature is valid, it loads the file from storage and returns a generator along with the file details. Additionally, the `FileService` class offers methods like `get_file_preview` and `get_image_preview` to retrieve file previews and image previews using the file ID [[1]](https://github.com/langgenius/dify/blob/main/api/controllers/files/tool_files.py)[[2]](https://github.com/langgenius/dify/blob/main/api/core/tools/tool_file_manager.py)[[3]](https://github.com/langgenius/dify/blob/main/api/services/file_service.py)[[4]](https://github.com/langgenius/dify/blob/main/api/controllers/files/image_preview.py). > > _To continue talking to [Dosu](https://dosu.dev), mention [@dosu](https://github.com/dosu)._ > > Help Dosu learn! Give it feedback: [Great Response](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=great_response) | [Irrelevant Answer](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=irrelevant_answer) | [Incorrect Sources](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=incorrect_sources) | [Too Verbose](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=hallucination) | [Bug Report](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=bug_report) | [Other](https://app.dosu.dev/response-feedback/ab4f3127-6309-4e84-8ebb-c5404ea80f29?feedback_type=other) what? i mean, is there a certain api address?
yindo commented 2026-02-21 18:25:10 -05:00
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@crazywoola commented on GitHub (Feb 17, 2025):

No

@crazywoola commented on GitHub (Feb 17, 2025): No
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