Feat/support 302ai provider (#8742)

### What problem does this PR solve?

Support 302.AI provider.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

rag/llm/chat_model.py

@@ -1724,8 +1724,6 @@ class GPUStackChat(Base):
             raise ValueError("Local llm url cannot be None")
         base_url = urljoin(base_url, "v1")
         super().__init__(key, model_name, base_url, **kwargs)
-
-
 class DeepInfraChat(Base):
     _FACTORY_NAME = "DeepInfra"
 
@@ -1733,3 +1731,12 @@ class DeepInfraChat(Base):
         if not base_url:
             base_url = "https://api.deepinfra.com/v1/openai"
         super().__init__(key, model_name, base_url, **kwargs)
+        
+
+class Ai302Chat(Base):
+    _FACTORY_NAME = "302.AI"
+
+    def __init__(self, key, model_name, base_url="https://api.302.ai/v1", **kwargs):
+        if not base_url:
+            base_url = "https://api.302.ai/v1"
+        super().__init__(key, model_name, base_url, **kwargs)

rag/llm/embedding_model.py

@@ -930,8 +930,7 @@ class GiteeEmbed(SILICONFLOWEmbed):
         if not base_url:
             base_url = "https://ai.gitee.com/v1/embeddings"
         super().__init__(key, model_name, base_url)
-
-
+        
 class DeepInfraEmbed(OpenAIEmbed):
     _FACTORY_NAME = "DeepInfra"
 
@@ -939,3 +938,12 @@ class DeepInfraEmbed(OpenAIEmbed):
         if not base_url:
             base_url = "https://api.deepinfra.com/v1/openai"
         super().__init__(key, model_name, base_url)
+
+
+class Ai302Embed(Base):
+    _FACTORY_NAME = "302.AI"
+
+    def __init__(self, key, model_name, base_url="https://api.302.ai/v1/embeddings"):
+        if not base_url:
+            base_url = "https://api.302.ai/v1/embeddings"
+        super().__init__(key, model_name, base_url)

rag/llm/rerank_model.py

@@ -617,3 +617,12 @@ class GiteeRerank(JinaRerank):
         if not base_url:
             base_url = "https://ai.gitee.com/v1/rerank"
         super().__init__(key, model_name, base_url)
+
+
+class Ai302Rerank(Base):
+    _FACTORY_NAME = "302.AI"
+
+    def __init__(self, key, model_name, base_url="https://api.302.ai/v1/rerank"):
+        if not base_url:
+            base_url = "https://api.302.ai/v1/rerank"
+        super().__init__(key, model_name, base_url)

rag/llm/sequence2txt_model.py

@@ -208,7 +208,6 @@ class GiteeSeq2txt(Base):
         self.client = OpenAI(api_key=key, base_url=base_url)
         self.model_name = model_name
 
-
 class DeepInfraSeq2txt(Base):
     _FACTORY_NAME = "DeepInfra"
 

rag/llm/tts_model.py

@@ -383,7 +383,6 @@ class SILICONFLOWTTS(Base):
             if chunk:
                 yield chunk
 
-
 class DeepInfraTTS(OpenAITTS):
     _FACTORY_NAME = "DeepInfra"