### What problem does this PR solve?
API options like `stream` was ignored when no session_id was provided.
This PR fixes the issue.
Test command and expected result:
```
curl --request POST \
--url http://:9222/api/v1/chats/2f2e1d30ee6111efafe211749b004925/completions \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer ragflow-xxx' \
--data '{
"question":"Who are you",
"stream":false
}'
{"code":0,"data":"data:{\"code\": 0, \"message\": \"\", \"data\": {\"answer\": \"Hi! I'm your assistant, what can I do for you?\", \"reference\": {}, \"audio_binary\": null, \"id\": null, \"session_id\": \"82ceb0fcee7111efafe211749b004925\"}}\n\n"}
```
### Type of change
- [*] Bug Fix (non-breaking change which fixes an issue)
Fix: The max tokens defined by the tenant are not used (#4297) (#2817) (#5066)
### What problem does this PR solve?
Fix: The max tokens defined by the tenant are not used (#4297) (#2817)
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
---------
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
Update agent session API, to support uploading files while create a new session (#5039)
### What problem does this PR solve?
Update the agent session API "POST /api/v1/agents/{agent_id}/sessions",
to support uploading files while create a new session:
- currently, the API only supports requesting with a json body. If user
wants to upload a doc or image when create session, like what is already
supported on the web client, we need to update the API.
- if upload an image, ragflow will call image2text, and a user_id is
needed for the image2text model. So we need to send user_id in the API
request. As form-data is needed to upload files, not json body, seems we
need to put the user_id in the url as an optional parameter (currently
user_id is an optional in json body).
### Type of change
- [x] Documentation Update
- [x] Other (please describe):
Fix knowledge graph node not found (#4968) (#4970)
### What problem does this PR solve?
Fix knowledge graph node not found (#4968)
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
Fixes KeyError: 'content' when using stream=False (#4944)
### 🛠 Fixes `KeyError: 'content'` when using `stream=False`
#### 🔍 Problem
When calling the chat API with `stream=False`, the code attempts to
access `msg[-1]["content"]` without verifying if the key exists. This
causes a `KeyError` when the message structure does not contain
`"content"`.
This issue was discussed in
[#4885](https://github.com/infiniflow/ragflow/issues/4885), where we
analyzed the root cause. The error does not occur with `stream=True`, as
the response is processed differently.
#### ✅ Solution
- **Logging Fix:**
- Before accessing `msg[-1]["content"]`, we check if the key exists.
- If it does not exist, a default value (`"[content not available]"`) is
used to prevent errors.
- **Structural Fix in `msg` Construction:**
- Ensured that every message in `msg` contains the `"content"` key, even
if empty.
- This fixes the issue at its root and ensures consistent behavior
between `stream=True` and `stream=False`.
#### 🔄 Impact
- Prevents the `KeyError` without affecting normal application flow.
- Ensures the integrity of the `msg` structure, avoiding future
failures.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
optimize TenantLLMService.increase_usage for "can't update token usag… (#4755)
…e error " message
### What problem does this PR solve?
optimize TenantLLMService.increase_usage Performance
### Type of change
- [x] Performance Improvement
Co-authored-by: che_shuai <che_shuai@massclouds.com>
### What problem does this PR solve?
Add GPUStack as a new model provider.
[GPUStack](https://github.com/gpustack/gpustack) is an open-source GPU
cluster manager for running LLMs. Currently, locally deployed models in
GPUStack cannot integrate well with RAGFlow. GPUStack provides both
OpenAI compatible APIs (Models / Chat Completions / Embeddings /
Speech2Text / TTS) and other APIs like Rerank. We would like to use
GPUStack as a model provider in ragflow.
[GPUStack Docs](https://docs.gpustack.ai/latest/quickstart/)
Related issue: https://github.com/infiniflow/ragflow/issues/4064.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### Testing Instructions
1. Install GPUStack and deploy the `llama-3.2-1b-instruct` llm, `bge-m3`
text embedding model, `bge-reranker-v2-m3` rerank model,
`faster-whisper-medium` Speech-to-Text model, `cosyvoice-300m-sft` in
GPUStack.
2. Add provider in ragflow settings.
3. Testing in ragflow.
### What problem does this PR solve?
Fix potential SSRF attack vulnerability
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Fix agent_completion bug #4320
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
---------
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
Update error message for agent name conflict (#4299)
### What problem does this PR solve?
Update error message for agent name conflict
### Type of change
- [x] Refactoring
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
Add top_k for create_chat and update_chat api (#4294)
### What problem does this PR solve?
Add top_k for create_chat and update_chat api #4157
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Fix bugs in chunk api #4149
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
---------
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
petertc
zhxlp
Kevin Hu
flygithub
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kuschzzp
Peterson Alves
davidche
Zhichang Yu
Jin Hai
Alex Chen
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