init: 初始化项目

backend/app/services/ref_parser.py

@@ -0,0 +1,46 @@
+import os
+import json
+from docx import Document
+from PyPDF2 import PdfReader
+from app.services.file_storage import get_file_content
+
+
+async def parse_reference_file(file_path: str) -> str:
+    ext = os.path.splitext(file_path)[1].lower()
+    content = await get_file_content(file_path)
+
+    if ext == ".txt":
+        return content.decode("utf-8", errors="ignore")
+    if ext == ".docx":
+        from io import BytesIO
+        doc = Document(BytesIO(content))
+        return "\n".join(p.text for p in doc.paragraphs if p.text.strip())
+    if ext == ".pdf":
+        from io import BytesIO
+        reader = PdfReader(BytesIO(content))
+        return "\n".join(page.extract_text() or "" for page in reader.pages)
+
+    raise ValueError(f"不支持的文件格式: {ext}")
+
+
+async def parse_reference_files(ref_file_path: str | None) -> str:
+    if not ref_file_path:
+        return ""
+
+    try:
+        paths = json.loads(ref_file_path)
+        if isinstance(paths, list):
+            texts = []
+            for path in paths:
+                try:
+                    texts.append(await parse_reference_file(path))
+                except Exception:
+                    texts.append(f"[无法解析文件: {path}]")
+            return "\n\n".join(texts)
+    except json.JSONDecodeError:
+        pass
+
+    try:
+        return await parse_reference_file(ref_file_path)
+    except Exception:
+        return f"[无法解析文件: {ref_file_path}]"