> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-zh.cn/llms.txt
> Use this file to discover all available pages before exploring further.

# 华为 OBS 目录集成

> 使用 LangChain Python 集成华为 OBS 目录文档加载器。

以下代码展示了如何从华为 OBS（对象存储服务）加载对象作为文档。

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
# 安装所需包
# pip install esdk-obs-python
```

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
from langchain_community.document_loaders import OBSDirectoryLoader
```

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
endpoint = "your-endpoint"
```

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
# 配置您的访问凭证\n
config = {"ak": "your-access-key", "sk": "your-secret-key"}
loader = OBSDirectoryLoader("your-bucket-name", endpoint=endpoint, config=config)
```

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
loader.load()
```

## 指定加载前缀

如果您想从存储桶中加载具有特定前缀的对象，可以使用以下代码：

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
loader = OBSDirectoryLoader(
    "your-bucket-name", endpoint=endpoint, config=config, prefix="test_prefix"
)
```

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
loader.load()
```

## 从 ECS 获取认证信息

如果您的 langchain 部署在华为云 ECS 上，并且[已设置委托](https://support.huaweicloud.com/intl/zh-cn/usermanual-ecs/ecs_03_0166.html#section7)，加载器可以直接从 ECS 获取安全令牌，无需访问密钥和秘密密钥。

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
config = {"get_token_from_ecs": True}
loader = OBSDirectoryLoader("your-bucket-name", endpoint=endpoint, config=config)
```

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
loader.load()
```

## 使用公共存储桶

如果您的存储桶策略允许匿名访问（匿名用户拥有 `listBucket` 和 `GetObject` 权限），您可以直接加载对象，无需配置 `config` 参数。

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
loader = OBSDirectoryLoader("your-bucket-name", endpoint=endpoint)
```

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
loader.load()
```

***

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