> ## 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 文件集成

> 使用 LangChain Python 集成华为 OBS 文件文档加载器。

以下代码演示了如何从华为 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.obs_file import OBSFileLoader
```

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

```python theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
from obs import ObsClient

obs_client = ObsClient(
    access_key_id="your-access-key",
    secret_access_key="your-secret-key",
    server=endpoint,
)
loader = OBSFileLoader("your-bucket-name", "your-object-key", client=obs_client)
```

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

## 每个加载器使用独立的认证信息

如果不需要在不同加载器之间复用 OBS 连接，可以直接配置 `config`。加载器将使用配置信息初始化自己的 OBS 客户端。

```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 = OBSFileLoader(
    "your-bucket-name", "your-object-key", endpoint=endpoint, config=config
)
```

```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/en-us/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 = OBSFileLoader(
    "your-bucket-name", "your-object-key", endpoint=endpoint, config=config
)
```

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

## 访问公开可读对象

如果您要访问的对象允许匿名用户访问（匿名用户拥有 `GetObject` 权限），可以直接加载对象而无需配置 `config` 参数。

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

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

***

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