mirror of
https://github.com/RhenCloud/Cloud-Index.git
synced 2025-12-06 15:26:10 +08:00
501 lines
16 KiB
Python
501 lines
16 KiB
Python
import base64
|
||
import os
|
||
from datetime import datetime
|
||
from io import BytesIO
|
||
from typing import Any, Dict
|
||
|
||
import dotenv
|
||
import requests
|
||
from PIL import Image
|
||
|
||
from .base import BaseStorage
|
||
|
||
dotenv.load_dotenv()
|
||
|
||
|
||
class StreamWrapper:
|
||
"""为 BytesIO 包装器，使其支持 iter_chunks() 方法以兼容 R2 的流式响应"""
|
||
|
||
def __init__(self, data: bytes, chunk_size: int = 8192):
|
||
self.data = data
|
||
self.chunk_size = chunk_size
|
||
self.position = 0
|
||
|
||
def iter_chunks(self, chunk_size: int = None):
|
||
"""迭代返回数据块"""
|
||
chunk_size = chunk_size or self.chunk_size
|
||
offset = 0
|
||
while offset < len(self.data):
|
||
yield self.data[offset : offset + chunk_size]
|
||
offset += chunk_size
|
||
|
||
def read(self, size: int = -1):
|
||
"""为了兼容性支持 read() 方法"""
|
||
if size == -1:
|
||
return self.data
|
||
result = self.data[self.position : self.position + size]
|
||
self.position += len(result)
|
||
return result
|
||
|
||
def seek(self, offset: int):
|
||
"""为了兼容性支持 seek() 方法"""
|
||
self.position = offset
|
||
|
||
def tell(self):
|
||
"""为了兼容性支持 tell() 方法"""
|
||
return self.position
|
||
|
||
|
||
class GitHubStorage(BaseStorage):
|
||
"""基于 GitHub 仓库的存储实现"""
|
||
|
||
def __init__(self):
|
||
self.repo_owner = os.getenv("GITHUB_REPO_OWNER")
|
||
self.repo_name = os.getenv("GITHUB_REPO_NAME")
|
||
self.access_token = os.getenv("GITHUB_ACCESS_TOKEN")
|
||
self.branch = os.getenv("GITHUB_BRANCH", "main")
|
||
# 反向代理 URL，用于加速 GitHub raw 文件访问
|
||
# 例如：https://raw. githubusercontent.com/ 的反向代理 URL
|
||
self.raw_proxy_url = os.getenv("GITHUB_RAW_PROXY_URL", "").rstrip("/")
|
||
|
||
if not all([self.repo_owner, self.repo_name, self.access_token]):
|
||
raise RuntimeError(
|
||
"GITHUB_REPO_OWNER, GITHUB_REPO_NAME, GITHUB_ACCESS_TOKEN must be set"
|
||
)
|
||
|
||
self.api_base_url = (
|
||
f"https://api.github.com/repos/{self.repo_owner}/{self.repo_name}"
|
||
)
|
||
|
||
# 如果配置了代理 URL，则使用代理 URL；否则使用官方 raw.githubusercontent.com
|
||
if self.raw_proxy_url:
|
||
self.raw_content_url = f"{self.raw_proxy_url}/https://raw.githubusercontent.com/{self.repo_owner}/{self.repo_name}/{self.branch}"
|
||
else:
|
||
self.raw_content_url = f"https://raw.githubusercontent.com/{self.repo_owner}/{self.repo_name}/{self.branch}"
|
||
|
||
def _headers(self) -> Dict[str, str]:
|
||
"""返回 API 请求的公共头部信息"""
|
||
return {
|
||
"Authorization": f"token {self.access_token}",
|
||
"Accept": "application/vnd.github.v3+json",
|
||
}
|
||
|
||
def _get_file_sha(self, file_path: str) -> str:
|
||
"""获取文件的 SHA 值用于更新或删除"""
|
||
try:
|
||
url = f"{self.api_base_url}/contents/{file_path}"
|
||
response = requests.get(url, headers=self._headers())
|
||
if response.status_code == 200:
|
||
return response.json().get("sha")
|
||
except Exception:
|
||
pass
|
||
return None
|
||
|
||
def _get_last_commit_time(self, file_path: str) -> datetime:
|
||
"""获取文件的最后提交时间，返回 datetime 对象"""
|
||
try:
|
||
url = f"{self.api_base_url}/commits"
|
||
params = {"path": file_path, "per_page": 1}
|
||
response = requests.get(url, headers=self._headers(), params=params)
|
||
if response.status_code == 200:
|
||
commits = response.json()
|
||
if commits and len(commits) > 0:
|
||
time_str = commits[0]["commit"]["author"]["date"]
|
||
# 解析 ISO 格式时间字符串为 datetime 对象
|
||
# 格式: "2025-11-08T10:55:26Z"
|
||
return datetime.fromisoformat(time_str.replace("Z", "+00:00"))
|
||
except Exception:
|
||
pass
|
||
return datetime.now()
|
||
|
||
def list_objects(self, prefix: str = "") -> Dict[str, Any]:
|
||
"""
|
||
列出存储桶中的对象
|
||
|
||
Args:
|
||
prefix: 对象前缀（用于目录浏览）
|
||
|
||
Returns:
|
||
包含对象列表的字典
|
||
"""
|
||
try:
|
||
# 移除末尾的 / 以保持 GitHub API 的一致性
|
||
prefix = prefix.rstrip("/") if prefix else ""
|
||
url = (
|
||
f"{self.api_base_url}/contents/{prefix}"
|
||
if prefix
|
||
else f"{self.api_base_url}/contents"
|
||
)
|
||
response = requests.get(url, headers=self._headers())
|
||
response.raise_for_status()
|
||
|
||
contents = response.json()
|
||
if not isinstance(contents, list):
|
||
contents = [contents]
|
||
|
||
files = []
|
||
folders = []
|
||
|
||
for item in contents:
|
||
if item["type"] == "file":
|
||
# 跳过 .gitkeep 文件
|
||
if item["name"] == ".gitkeep":
|
||
continue
|
||
|
||
# 获取最后提交时间
|
||
last_modified = self._get_last_commit_time(item["path"])
|
||
|
||
files.append(
|
||
{
|
||
"Key": item["path"],
|
||
"Size": item["size"],
|
||
"LastModified": last_modified,
|
||
"ETag": item["sha"],
|
||
}
|
||
)
|
||
elif item["type"] == "dir":
|
||
folders.append({"Prefix": item["path"] + "/"})
|
||
|
||
return {
|
||
"Contents": files,
|
||
"CommonPrefixes": folders,
|
||
"IsTruncated": False,
|
||
}
|
||
except Exception as e:
|
||
return {"Contents": [], "CommonPrefixes": [], "Error": str(e)}
|
||
|
||
def get_object_info(self, key: str) -> Dict[str, Any]:
|
||
"""
|
||
获取对象基本信息
|
||
|
||
Args:
|
||
key: 对象键名
|
||
|
||
Returns:
|
||
对象元数据
|
||
"""
|
||
try:
|
||
url = f"{self.api_base_url}/contents/{key}"
|
||
response = requests.get(url, headers=self._headers())
|
||
response.raise_for_status()
|
||
|
||
data = response.json()
|
||
last_modified = self._get_last_commit_time(key)
|
||
|
||
return {
|
||
"Key": data["path"],
|
||
"Size": data["size"],
|
||
"ContentLength": data["size"], # 为了兼容路由代码
|
||
"LastModified": last_modified,
|
||
"ETag": data["sha"],
|
||
"ContentType": "application/octet-stream",
|
||
}
|
||
except Exception as e:
|
||
raise RuntimeError(f"Failed to get object info: {str(e)}") from e
|
||
|
||
def get_object(self, key: str) -> Dict[str, Any]:
|
||
"""
|
||
获取对象内容
|
||
|
||
Args:
|
||
key: 对象键名
|
||
|
||
Returns:
|
||
包含对象内容的字典，Body 支持 iter_chunks() 方法
|
||
"""
|
||
try:
|
||
url = f"{self.raw_content_url}/{key}"
|
||
response = requests.get(url)
|
||
response.raise_for_status()
|
||
|
||
content = response.content
|
||
return {
|
||
"Body": StreamWrapper(content),
|
||
"ContentLength": len(content),
|
||
"ContentType": response.headers.get(
|
||
"Content-Type", "application/octet-stream"
|
||
),
|
||
}
|
||
except Exception as e:
|
||
raise RuntimeError(f"Failed to get object: {str(e)}") from e
|
||
|
||
def generate_presigned_url(self, key: str, expires: int = None) -> str:
|
||
"""
|
||
为指定对象生成预签名 URL
|
||
|
||
Args:
|
||
key: 对象键名
|
||
expires: 过期时间（秒）
|
||
|
||
Returns:
|
||
预签名 URL，失败返回 None
|
||
"""
|
||
try:
|
||
# GitHub raw 内容 URL - 直接返回文件内容
|
||
# 这会被前端用于下载
|
||
return f"{self.raw_content_url}/{key}"
|
||
except Exception:
|
||
return None
|
||
|
||
def get_public_url(self, key: str) -> str:
|
||
"""
|
||
生成对象的公共访问 URL
|
||
|
||
Args:
|
||
key: 对象键名
|
||
|
||
Returns:
|
||
公共 URL，未配置返回 None
|
||
"""
|
||
return f"{self.raw_content_url}/{key}"
|
||
|
||
def generate_thumbnail(self, file_path: str) -> bytes:
|
||
"""
|
||
生成图片缩略图
|
||
|
||
Args:
|
||
file_path: 文件路径
|
||
|
||
Returns:
|
||
缩略图字节数据
|
||
"""
|
||
try:
|
||
obj = self.get_object(file_path)
|
||
# StreamWrapper 需要转换为 BytesIO 以兼容 PIL
|
||
body = obj["Body"]
|
||
if isinstance(body, StreamWrapper):
|
||
image_data = body.read()
|
||
image_bytes = BytesIO(image_data)
|
||
else:
|
||
image_bytes = body
|
||
|
||
img = Image.open(image_bytes)
|
||
img.thumbnail((200, 200))
|
||
|
||
thumbnail_io = BytesIO()
|
||
img.save(thumbnail_io, format="JPEG")
|
||
thumbnail_io.seek(0)
|
||
return thumbnail_io.read()
|
||
except Exception as e:
|
||
raise RuntimeError(f"Failed to generate thumbnail: {str(e)}") from e
|
||
|
||
def upload_file(self, key: str, file_data: bytes, content_type: str = None) -> bool:
|
||
"""
|
||
上传文件到存储
|
||
|
||
Args:
|
||
key: 对象键名（文件路径）
|
||
file_data: 文件二进制数据
|
||
content_type: 文件类型（MIME type）
|
||
|
||
Returns:
|
||
上传成功返回 True，失败返回 False
|
||
"""
|
||
try:
|
||
url = f"{self.api_base_url}/contents/{key}"
|
||
encoded_content = base64.b64encode(file_data).decode("utf-8")
|
||
|
||
# 检查文件是否已存在
|
||
sha = self._get_file_sha(key)
|
||
|
||
data = {
|
||
"message": f"Upload {key}",
|
||
"content": encoded_content,
|
||
"branch": self.branch,
|
||
}
|
||
|
||
if sha:
|
||
data["sha"] = sha
|
||
|
||
response = requests.put(url, json=data, headers=self._headers())
|
||
response.raise_for_status()
|
||
return True
|
||
except Exception as e:
|
||
print(f"Upload failed: {str(e)}")
|
||
return False
|
||
|
||
def delete_file(self, key: str) -> bool:
|
||
"""
|
||
删除存储中的文件
|
||
|
||
Args:
|
||
key: 对象键名（文件路径）
|
||
|
||
Returns:
|
||
删除成功返回 True，失败返回 False
|
||
"""
|
||
try:
|
||
sha = self._get_file_sha(key)
|
||
if not sha:
|
||
return False
|
||
|
||
url = f"{self.api_base_url}/contents/{key}"
|
||
data = {
|
||
"message": f"Delete {key}",
|
||
"sha": sha,
|
||
"branch": self.branch,
|
||
}
|
||
|
||
response = requests.delete(url, json=data, headers=self._headers())
|
||
response.raise_for_status()
|
||
return True
|
||
except Exception as e:
|
||
print(f"Delete failed: {str(e)}")
|
||
return False
|
||
|
||
def rename_file(self, old_key: str, new_key: str) -> bool:
|
||
"""
|
||
重命名存储中的文件
|
||
|
||
Args:
|
||
old_key: 旧的对象键名
|
||
new_key: 新的对象键名
|
||
|
||
Returns:
|
||
重命名成功返回 True，失败返回 False
|
||
"""
|
||
try:
|
||
# 获取原文件内容
|
||
obj = self.get_object(old_key)
|
||
content = obj["Body"].read()
|
||
|
||
# 上传到新位置
|
||
if not self.upload_file(new_key, content):
|
||
return False
|
||
|
||
# 删除原文件
|
||
return self.delete_file(old_key)
|
||
except Exception as e:
|
||
print(f"Rename failed: {str(e)}")
|
||
return False
|
||
|
||
def delete_folder(self, prefix: str) -> bool:
|
||
"""
|
||
删除存储中的文件夹（前缀）
|
||
|
||
Args:
|
||
prefix: 要删除的文件夹前缀
|
||
|
||
Returns:
|
||
删除成功返回 True，失败返回 False
|
||
"""
|
||
try:
|
||
# 确保前缀以 / 结尾
|
||
if prefix and not prefix.endswith("/"):
|
||
prefix = prefix + "/"
|
||
|
||
contents = self.list_objects(prefix)
|
||
files = contents.get("Contents", [])
|
||
|
||
# 删除所有文件
|
||
for file_info in files:
|
||
file_key = file_info["Key"]
|
||
if not self.delete_file(file_key):
|
||
return False
|
||
|
||
# 递归删除子文件夹
|
||
folders = contents.get("CommonPrefixes", [])
|
||
for folder in folders:
|
||
folder_prefix = folder["Prefix"]
|
||
# 确保递归时也传入正确格式的前缀（带末尾 /）
|
||
if not self.delete_folder(folder_prefix):
|
||
return False
|
||
|
||
return True
|
||
except Exception as e:
|
||
print(f"Delete folder failed: {str(e)}")
|
||
return False
|
||
|
||
def rename_folder(self, old_prefix: str, new_prefix: str) -> bool:
|
||
"""
|
||
重命名存储中的文件夹（前缀）
|
||
|
||
Args:
|
||
old_prefix: 旧的文件夹前缀
|
||
new_prefix: 新的文件夹前缀
|
||
|
||
Returns:
|
||
重命名成功返回 True，失败返回 False
|
||
"""
|
||
try:
|
||
contents = self.list_objects(old_prefix)
|
||
files = contents.get("Contents", [])
|
||
|
||
for file_info in files:
|
||
old_key = file_info["Key"]
|
||
new_key = old_key.replace(old_prefix, new_prefix, 1)
|
||
|
||
if not self.rename_file(old_key, new_key):
|
||
return False
|
||
|
||
return True
|
||
except Exception as e:
|
||
print(f"Rename folder failed: {str(e)}")
|
||
return False
|
||
|
||
def copy_file(self, source_key: str, dest_key: str) -> bool:
|
||
"""
|
||
复制存储中的文件
|
||
|
||
Args:
|
||
source_key: 源对象键名
|
||
dest_key: 目标对象键名
|
||
|
||
Returns:
|
||
复制成功返回 True，失败返回 False
|
||
"""
|
||
try:
|
||
obj = self.get_object(source_key)
|
||
content = obj["Body"].read()
|
||
return self.upload_file(dest_key, content)
|
||
except Exception as e:
|
||
print(f"Copy failed: {str(e)}")
|
||
return False
|
||
|
||
def copy_folder(self, source_prefix: str, dest_prefix: str) -> bool:
|
||
"""
|
||
复制存储中的文件夹（前缀）
|
||
|
||
Args:
|
||
source_prefix: 源文件夹前缀
|
||
dest_prefix: 目标文件夹前缀
|
||
|
||
Returns:
|
||
复制成功返回 True，失败返回 False
|
||
"""
|
||
try:
|
||
contents = self.list_objects(source_prefix)
|
||
files = contents.get("Contents", [])
|
||
|
||
for file_info in files:
|
||
source_key = file_info["Key"]
|
||
dest_key = source_key.replace(source_prefix, dest_prefix, 1)
|
||
|
||
if not self.copy_file(source_key, dest_key):
|
||
return False
|
||
|
||
return True
|
||
except Exception as e:
|
||
print(f"Copy folder failed: {str(e)}")
|
||
return False
|
||
|
||
def create_folder(self, key: str) -> bool:
|
||
"""
|
||
创建文件夹
|
||
|
||
Args:
|
||
key: 文件夹路径（以 / 结尾）
|
||
|
||
Returns:
|
||
创建成功返回 True，失败返回 False
|
||
"""
|
||
try:
|
||
# GitHub 不需要显式创建文件夹
|
||
# 如果需要标记文件夹存在，可以创建 .gitkeep 文件
|
||
# 但为了不显示 .gitkeep，我们在这里直接返回 True
|
||
# 实际的文件夹会在上传文件时自动创建
|
||
return True
|
||
except Exception as e:
|
||
print(f"Create folder failed: {str(e)}")
|
||
return False
|