rollback upload api

app/modules/filemanager/storages/u115.py

@@ -4,12 +4,12 @@ import io
 import secrets
 import threading
 import time
-from concurrent.futures import ThreadPoolExecutor, as_completed
 from pathlib import Path
 from typing import List, Dict, Optional, Tuple, Union
 
 import oss2
 import requests
+from oss2 import SizedFileAdapter, determine_part_size
 from oss2.models import PartInfo
 from tqdm import tqdm
 
@@ -54,13 +54,6 @@ class U115Pan(StorageBase, metaclass=Singleton):
     # CID和路径缓存
     _id_cache: Dict[str, str] = {}
 
-    # 最大线程数
-    MAX_WORKERS = 10
-    # 最大分片大小(1GB)
-    MAX_PART_SIZE = 1024 * 1024 * 1024
-    # 最小分片大小(100MB)
-    MIN_PART_SIZE = 100 * 1024 * 1024
-
     def __init__(self):
         super().__init__()
         self.session = requests.Session()
@@ -406,35 +399,6 @@ class U115Pan(StorageBase, metaclass=Singleton):
             modify_time=int(time.time())
         )
 
-    def _calc_parts(self, file_size: int) -> Tuple[int, int]:
-        """
-        计算最优分片大小和线程数，在最大分片大小和最小分片大小之间取最优值
-        :param file_size: 文件大小
-        :return: 分片大小，线程数
-        """
-        if file_size <= self.MIN_PART_SIZE:
-            return file_size, 1
-        if file_size >= self.MAX_PART_SIZE:
-            part_size = self.MAX_PART_SIZE
-        else:
-            part_size = max(self.MIN_PART_SIZE, file_size // self.MAX_WORKERS)
-        return part_size, (file_size + part_size - 1) // part_size
-
-    @staticmethod
-    def _upload_part(bucket: oss2.Bucket, object_name: str, upload_id: str,
-                     part_number: int, part_data: bytes) -> Tuple[PartInfo, int]:
-        """
-        上传单个分片
-        """
-        try:
-            result = bucket.upload_part(object_name, upload_id, part_number, part_data)
-            part_info = PartInfo(part_number, result.etag)
-            logger.info(f"【115】分片 {part_number} 上传完成")
-            return part_info, len(part_data)
-        except Exception as e:
-            logger.error(f"【115】分片 {part_number} 上传失败: {str(e)}")
-            raise
-
     @staticmethod
     def _log_progress(desc: str, total: int) -> tqdm:
         """
@@ -461,10 +425,10 @@ class U115Pan(StorageBase, metaclass=Singleton):
     def upload(self, target_dir: schemas.FileItem, local_path: Path,
                new_name: Optional[str] = None) -> Optional[schemas.FileItem]:
         """
-        实现带秒传、断点续传和多线程并发上传
+        实现带秒传、断点续传和二次认证的文件上传
         """
 
-        def encode_callback(cb: str):
+        def encode_callback(cb: str) -> str:
             return oss2.utils.b64encode_as_string(cb)
 
         target_name = new_name or local_path.name
@@ -496,7 +460,6 @@ class U115Pan(StorageBase, metaclass=Singleton):
         if not init_resp.get("state"):
             logger.warn(f"【115】初始化上传失败: {init_resp.get('error')}")
             return None
-
         # 结果
         init_result = init_resp.get("data")
         logger.debug(f"【115】上传 Step 1 初始化结果: {init_result}")
@@ -514,10 +477,15 @@ class U115Pan(StorageBase, metaclass=Singleton):
             sign_checks = sign_check.split("-")
             start = int(sign_checks[0])
             end = int(sign_checks[1])
+            # 计算指定区间的SHA1
+            # sign_check （用下划线隔开,截取上传文内容的sha1）(单位是byte): "2392148-2392298"
             with open(local_path, "rb") as f:
+                # 取2392148-2392298之间的内容(包含2392148、2392298)的sha1
                 f.seek(start)
                 chunk = f.read(end - start + 1)
                 sign_val = hashlib.sha1(chunk).hexdigest().upper()
+            # 重新初始化请求
+            # sign_key，sign_val(根据sign_check计算的值大写的sha1值)
             init_data.update({
                 "pick_code": pick_code,
                 "sign_key": sign_key,
@@ -530,6 +498,7 @@ class U115Pan(StorageBase, metaclass=Singleton):
             )
             if not init_resp:
                 return None
+            # 二次认证结果
             init_result = init_resp.get("data")
             logger.debug(f"【115】上传 Step 2 二次认证结果: {init_result}")
             if not pick_code:
@@ -556,7 +525,7 @@ class U115Pan(StorageBase, metaclass=Singleton):
             logger.warn("【115】获取上传凭证失败")
             return None
         logger.debug(f"【115】上传 Step 4 获取上传凭证结果: {token_resp}")
-
+        # 上传凭证
         endpoint = token_resp.get("endpoint")
         AccessKeyId = token_resp.get("AccessKeyId")
         AccessKeySecret = token_resp.get("AccessKeySecret")
@@ -579,74 +548,60 @@ class U115Pan(StorageBase, metaclass=Singleton):
             if resume_resp.get("callback"):
                 callback = resume_resp["callback"]
 
-        # Step 6: 多线程分片上传
+        # Step 6: 对象存储上传
         auth = oss2.StsAuth(
             access_key_id=AccessKeyId,
             access_key_secret=AccessKeySecret,
             security_token=SecurityToken
         )
         bucket = oss2.Bucket(auth, endpoint, bucket_name)  # noqa
-
-        # 计算分片大小和线程数
-        part_size, workers = self._calc_parts(file_size)
-        logger.info(f"【115】开始上传: {local_path} -> {target_path}，"
-                    f"分片大小：{StringUtils.str_filesize(part_size)}，线程数：{workers}")
+        # determine_part_size方法用于确定分片大小，设置分片大小为 100M
+        part_size = determine_part_size(file_size, preferred_size=100 * 1024 * 1024)
 
         # 初始化进度条
-        progress_bar = self._log_progress(f"【115】{target_name} 上传进度", file_size)
+        logger.info(f"【115】开始上传: {local_path} -> {target_path}，分片大小：{StringUtils.str_filesize(part_size)}")
+        progress_bar = tqdm(
+            total=file_size,
+            unit='B',
+            unit_scale=True,
+            desc="上传进度",
+            ascii=True
+        )
 
-        # 初始化分片上传
+        # 初始化分片
         upload_id = bucket.init_multipart_upload(object_name,
                                                  params={
-                                                     "encoding-type": "url"
+                                                     "encoding-type": "url",
+                                                     "sequential": ""
                                                  }).upload_id
+        parts = []
+        # 逐个上传分片
+        with open(local_path, 'rb') as fileobj:
+            part_number = 1
+            offset = 0
+            while offset < file_size:
+                num_to_upload = min(part_size, file_size - offset)
+                # 调用SizedFileAdapter(fileobj, size)方法会生成一个新的文件对象，重新计算起始追加位置。
+                logger.info(f"【115】开始上传 {target_name} 分片 {part_number}: {offset} -> {offset + num_to_upload}")
+                result = bucket.upload_part(object_name, upload_id, part_number,
+                                            data=SizedFileAdapter(fileobj, num_to_upload))
+                parts.append(PartInfo(part_number, result.etag))
+                logger.info(f"【115】{target_name} 分片 {part_number} 上传完成")
+                offset += num_to_upload
+                part_number += 1
+                # 更新进度
+                progress_bar.update(num_to_upload)
 
-        # 创建线程池
-        with ThreadPoolExecutor(max_workers=workers) as pool:
-            futures = []
-            parts = []
+        # 关闭进度条
+        if progress_bar:
+            progress_bar.close()
 
-            # 提交上传任务
-            with open(local_path, 'rb') as fileobj:
-                part_number = 1
-                offset = 0
-                while offset < file_size:
-                    size = min(part_size, file_size - offset)
-                    fileobj.seek(offset)
-                    part_data = fileobj.read(size)
-                    future = pool.submit(
-                        self._upload_part,
-                        bucket,
-                        object_name,
-                        upload_id,
-                        part_number,
-                        part_data
-                    )
-                    futures.append(future)
-                    offset += size
-                    part_number += 1
-
-            # 等待所有任务完成
-            for future in as_completed(futures):
-                try:
-                    part_info, uploaded = future.result()
-                    parts.append(part_info)
-                    progress_bar.update(uploaded)
-                except Exception as e:
-                    logger.error(f"【115】分片上传失败: {str(e)}")
-                    progress_bar.close()
-                    return None
-
-        # 按分片号排序
-        parts.sort(key=lambda x: x.part_number)
-
-        # 完成上传
+        # 请求头
         headers = {
             'X-oss-callback': encode_callback(callback["callback"]),
             'x-oss-callback-var': encode_callback(callback["callback_var"]),
             'x-oss-forbid-overwrite': 'false'
         }
-
         try:
             result = bucket.complete_multipart_upload(object_name, upload_id, parts,
                                                       headers=headers)
@@ -662,9 +617,6 @@ class U115Pan(StorageBase, metaclass=Singleton):
             else:
                 logger.error(f"【115】{target_name} 上传失败: {e.status}, 错误码: {e.code}, 详情: {e.message}")
                 return None
-        finally:
-            progress_bar.close()
-
         # 返回结果
         return self.get_item(target_path)