feat: add fs-backend service

This commit is contained in:
tao.chen
2026-07-29 10:07:13 +08:00
parent 59a1b5e4d4
commit a4e4e5b0db
12 changed files with 915 additions and 0 deletions
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"""
路由模块初始化
"""
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"""
文件系统相关路由
"""
import os
import shutil
import subprocess
from typing import List
from fastapi import APIRouter, HTTPException, Query
from app.core.config import settings
from app.schemas.fs import (
FileContentResponse,
FileContentUpdateRequest,
FileContentUpdateResponse,
FileCreateRequest,
FileOperationResponse,
FileTreeItem,
)
from app.schemas.project import ProjectCreateRequest, ProjectCreateResponse
router = APIRouter()
def _is_git_ignored(directory: str, absolute_path: str) -> bool:
"""
判断指定路径是否被 git 忽略。
依赖目标目录是否为 git 仓库:
- 若是 git 仓库,使用 `git check-ignore` 判定;
- 若不是 git 仓库或 git 不可用,默认返回 False。
"""
try:
result = subprocess.run(
["git", "-C", directory, "check-ignore", absolute_path],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
timeout=5,
)
# git check-ignore 退出码:0 表示被忽略,1 表示未被忽略
return result.returncode == 0
except (FileNotFoundError, subprocess.TimeoutExpired):
# git 未安装或超时,按非忽略处理
return False
def _assert_path_allowed(real_directory: str, real_target: str) -> None:
"""
确保解析后的真实路径在允许范围内。
允许范围:
- 项目目录 real_directory 内(常规文件访问);
- BASE_WORKSPACE 工作空间内(允许 tables_meta 这类指向工作空间根的共享软链接)。
这样既阻止通过 `..` 或外部软链接逃逸出工作空间,又允许项目内合法的共享软链接。
"""
real_workspace = os.path.realpath(settings.BASE_WORKSPACE)
within_dir = real_target == real_directory or real_target.startswith(real_directory + os.sep)
within_workspace = real_target == real_workspace or real_target.startswith(real_workspace + os.sep)
if not (within_dir or within_workspace):
raise HTTPException(
status_code=400,
detail="非法的查询路径,检测到路径逃逸尝试"
)
@router.get("/file", response_model=List[FileTreeItem])
async def list_file_tree(
directory: str = Query(..., description="项目顶层绝对目录(URL 编码传输)"),
path: str = Query(..., description="相对于 directory 的查询路径,. 表示根目录"),
):
"""
查询指定目录下的文件树列表
- directory:项目顶层绝对目录,固定值(如 /root/workspace/test
- path:相对查询路径
- 传 `.`:读取 directory 根目录下所有文件 / 文件夹
- 传 `文件夹名/`(如 `ningxia/`):读取 directory/文件夹名 子目录内文件树
"""
# 规范化 directory:去除尾部斜杠
directory = os.path.normpath(directory)
# 安全校验:directory 必须存在且为目录
if not os.path.isdir(directory):
raise HTTPException(
status_code=400,
detail=f"目录不存在或不是文件夹:{directory}"
)
# 规范化 path:仅允许 `.` 或以 `/` 结尾的相对子路径
# 处理 path 为 `.` 的根目录情形
if path == "." or path == "":
target_dir = directory
else:
# 去除首尾空白,确保以 / 结尾(约定:文件夹末尾带 /)
rel_path = path.strip()
if not rel_path.endswith("/"):
rel_path = rel_path + "/"
# 去除结尾的 / 用于拼接
rel_path_clean = rel_path.rstrip("/")
# 禁止路径逃逸
if ".." in rel_path_clean.split("/"):
raise HTTPException(
status_code=400,
detail="非法的相对路径,禁止路径逃逸 (..)"
)
# 禁止绝对路径
if os.path.isabs(rel_path_clean):
raise HTTPException(
status_code=400,
detail="相对路径 path 不能为绝对路径"
)
target_dir = os.path.join(directory, rel_path_clean)
# 解析真实物理路径,确保最终路径在允许范围内(防逃逸,允许工作空间内软链接)
real_directory = os.path.realpath(directory)
real_target = os.path.realpath(target_dir)
_assert_path_allowed(real_directory, real_target)
if not os.path.isdir(real_target):
raise HTTPException(
status_code=404,
detail=f"查询的子目录不存在:{path}"
)
# 计算 path 前缀(基于 directory 的相对路径,用于拼接每个条目的 path)
# path 为 `.` 时前缀为空;否则前缀为 `文件夹名/`
if path == "." or path == "":
rel_prefix = ""
else:
rel_prefix = path.strip()
if not rel_prefix.endswith("/"):
rel_prefix = rel_prefix + "/"
items: List[FileTreeItem] = []
try:
entries = sorted(os.listdir(real_target))
except OSError as e:
raise HTTPException(
status_code=500,
detail=f"读取目录失败:{str(e)}"
)
for entry in entries:
abs_path = os.path.join(real_target, entry)
is_dir = os.path.isdir(abs_path)
# 基于 directory 的相对路径:文件夹末尾带 /,文件不带
rel_path = rel_prefix + entry + ("/" if is_dir else "")
items.append(
FileTreeItem(
name=entry,
path=rel_path,
absolute=abs_path,
type="directory" if is_dir else "file",
ignored=_is_git_ignored(directory, abs_path),
)
)
return items
def _resolve_file_path(directory: str, path: str):
"""
解析并校验「相对文件路径」对应的真实物理路径。
校验规则:
- directory 必须存在且为目录
- path 必须指向具体文件,不能为根目录(. / 空)
- 禁止路径逃逸(..)与绝对路径
- realpath 解析后必须仍位于 directory 内(防符号链接逃逸)
返回:(real_directory, real_target, rel_path)
"""
# 规范化 directory
directory = os.path.normpath(directory)
if not os.path.isdir(directory):
raise HTTPException(
status_code=400,
detail=f"目录不存在或不是文件夹:{directory}"
)
rel_path = path.strip().rstrip("/")
# 仅允许相对路径,禁止路径逃逸
if rel_path in ("", "."):
raise HTTPException(
status_code=400,
detail="path 必须指向具体文件,不能为根目录"
)
if ".." in rel_path.split("/"):
raise HTTPException(
status_code=400,
detail="非法的相对路径,禁止路径逃逸 (..)"
)
if os.path.isabs(rel_path):
raise HTTPException(
status_code=400,
detail="相对路径 path 不能为绝对路径"
)
target = os.path.join(directory, rel_path)
# 解析真实物理路径,确保最终路径在允许范围内(防逃逸,允许工作空间内软链接)
real_directory = os.path.realpath(directory)
real_target = os.path.realpath(target)
_assert_path_allowed(real_directory, real_target)
return real_directory, real_target, rel_path
@router.get("/file/content", response_model=FileContentResponse)
async def get_file_content(
directory: str = Query(..., description="项目顶层绝对目录(URL 编码传输)"),
path: str = Query(..., description="相对于 directory 的文件路径,如 appfile/main.py"),
):
"""
预览文件内容
- directory:项目顶层绝对目录
- path:相对于 directory 的文件路径(不带尾部 /,指向具体文件)
- 返回文本文件内容;二进制文件返回 type=binary 且 content 为空
"""
_real_directory, real_target, _rel_path = _resolve_file_path(directory, path)
if not os.path.exists(real_target):
raise HTTPException(
status_code=404,
detail=f"文件不存在:{path}"
)
if os.path.isdir(real_target):
raise HTTPException(
status_code=400,
detail=f"目标路径是文件夹,不是文件:{path}"
)
# 限制预览文件大小,避免读取超大文件
max_size = 5 * 1024 * 1024 # 5MB
try:
file_size = os.path.getsize(real_target)
if file_size > max_size:
raise HTTPException(
status_code=413,
detail=f"文件过大,无法预览({file_size} 字节,上限 {max_size} 字节)"
)
except OSError as e:
raise HTTPException(
status_code=500,
detail=f"读取文件信息失败:{str(e)}"
)
# 先按二进制读取前若干字节判断是否为文本
try:
with open(real_target, "rb") as f:
chunk = f.read(1024)
# 含 NUL 字节通常视为二进制
if b"\x00" in chunk:
return FileContentResponse(type="binary", content="")
# 尝试以 UTF-8 解码全文
with open(real_target, "r", encoding="utf-8") as f:
content = f.read()
return FileContentResponse(type="text", content=content)
except UnicodeDecodeError:
# 非 UTF-8 文本,按二进制处理
return FileContentResponse(type="binary", content="")
except OSError as e:
raise HTTPException(
status_code=500,
detail=f"读取文件失败:{str(e)}"
)
@router.put("/file/content", response_model=FileContentUpdateResponse)
async def update_file_content(
request: FileContentUpdateRequest,
directory: str = Query(..., description="项目顶层绝对目录(URL 编码传输)"),
path: str = Query(..., description="相对于 directory 的文件路径,如 appfile/main.py"),
):
"""
修改(覆盖写入)文件内容
- directory:项目顶层绝对目录
- path:相对于 directory 的文件路径(不带尾部 /,指向具体文件)
- 请求体 content:文件新内容(UTF-8 文本,整文件覆盖写入)
"""
_real_directory, real_target, rel_path = _resolve_file_path(directory, path)
if not os.path.exists(real_target):
raise HTTPException(
status_code=404,
detail=f"文件不存在:{path}"
)
if os.path.isdir(real_target):
raise HTTPException(
status_code=400,
detail=f"目标路径是文件夹,不是文件:{path}"
)
try:
# 整文件覆盖写入(UTF-8
with open(real_target, "w", encoding="utf-8") as f:
f.write(request.content)
except OSError as e:
raise HTTPException(
status_code=500,
detail=f"写入文件失败:{str(e)}"
)
return FileContentUpdateResponse(
success=True,
message="文件已保存",
path=rel_path,
absolute=real_target,
)
@router.post("/file", response_model=FileOperationResponse)
async def create_file_entry(
request: FileCreateRequest,
directory: str = Query(..., description="项目顶层绝对目录(URL 编码传输)"),
path: str = Query(..., description="相对于 directory 的新建项路径,如 appfile/new.py"),
):
"""
新建文件 / 文件夹
- directory:项目顶层绝对目录
- path:相对于 directory 的新建项路径(不带尾部 /)
- 请求体 typefile / directorytype=file 时可用 content 指定初始内容
- 目标已存在返回 409;新建文件时会自动创建所需父目录
"""
_real_directory, real_target, rel_path = _resolve_file_path(directory, path)
if os.path.exists(real_target):
raise HTTPException(
status_code=409,
detail=f"目标已存在:{path}"
)
item_type = request.type
try:
if item_type == "directory":
os.makedirs(real_target, exist_ok=False)
else:
# 文件:确保父目录存在后写入初始内容
parent_dir = os.path.dirname(real_target)
if parent_dir:
os.makedirs(parent_dir, exist_ok=True)
with open(real_target, "w", encoding="utf-8") as f:
f.write(request.content or "")
except OSError as e:
raise HTTPException(
status_code=500,
detail=f"新建失败:{str(e)}"
)
return FileOperationResponse(
success=True,
message=f"{'文件夹' if item_type == 'directory' else '文件'}已创建",
path=rel_path,
absolute=real_target,
type=item_type,
)
@router.delete("/file", response_model=FileOperationResponse)
async def delete_file_entry(
directory: str = Query(..., description="项目顶层绝对目录(URL 编码传输)"),
path: str = Query(..., description="相对于 directory 的待删除项路径"),
):
"""
删除文件 / 文件夹
- directory:项目顶层绝对目录
- path:相对于 directory 的待删除项路径(文件夹可带尾部 /)
- 文件夹递归删除;不存在返回 404
- path 不能为根目录(.),不会删除 directory 本身
"""
_real_directory, real_target, rel_path = _resolve_file_path(directory, path)
if not os.path.exists(real_target):
raise HTTPException(
status_code=404,
detail=f"目标不存在:{path}"
)
is_dir = os.path.isdir(real_target)
try:
if is_dir:
shutil.rmtree(real_target)
else:
os.remove(real_target)
except OSError as e:
raise HTTPException(
status_code=500,
detail=f"删除失败:{str(e)}"
)
return FileOperationResponse(
success=True,
message=f"{'文件夹' if is_dir else '文件'}已删除",
path=rel_path,
absolute=real_target,
type="directory" if is_dir else "file",
)
@router.post("/project/create", response_model=ProjectCreateResponse)
async def create_project(request: ProjectCreateRequest):
"""
创建新项目
- 校验项目名格式
- 拼接完整路径
- 确保路径在安全目录内
- 创建项目目录
- 软链接 BASE_WORKSPACE/tables_meta 到新项目下(共享表元数据)
"""
project_name = request.project_name
# 二次校验:禁止路径逃逸字符(防御性编程)
if ".." in project_name or "/" in project_name or "\\" in project_name:
raise HTTPException(
status_code=400,
detail="项目名称不能包含路径逃逸字符 (../ 或 / 或 \\)"
)
# 拼接完整路径
project_path = os.path.join(settings.BASE_WORKSPACE, project_name)
# 安全校验:确保最终路径在 base_workspace 内
real_workspace = os.path.realpath(settings.BASE_WORKSPACE)
real_project_path = os.path.realpath(os.path.dirname(project_path))
# 检查路径是否逃逸
if not real_project_path.startswith(real_workspace):
raise HTTPException(
status_code=400,
detail="非法的项目路径,检测到路径逃逸尝试"
)
try:
# 创建项目目录
os.makedirs(project_path, exist_ok=True)
except OSError as e:
raise HTTPException(
status_code=500,
detail=f"创建项目目录失败:{str(e)}"
)
# 软链接 BASE_WORKSPACE/tables_meta 到新项目下(共享表元数据)
# 使用相对路径,便于工作空间整体迁移;已存在则不覆盖
tables_meta_src = os.path.join(settings.BASE_WORKSPACE, "tables_meta")
tables_meta_link = os.path.join(project_path, "tables_meta")
symlink_note = ""
try:
if os.path.lexists(tables_meta_link):
# 已存在(可能是历史软链接或实际文件),不覆盖
pass
elif not os.path.exists(tables_meta_src):
symlink_note = "(未找到 tables_meta 源,已跳过软链接)"
else:
rel_src = os.path.relpath(tables_meta_src, project_path)
os.symlink(rel_src, tables_meta_link)
except OSError as e:
symlink_note = f"(软链接 tables_meta 失败:{str(e)}"
return ProjectCreateResponse(
success=True,
message=f"项目 '{project_name}' 创建成功{symlink_note}",
project_path=project_path
)