# 请求头、Cookie、方法

网页爬虫API通过使用我们团队预定义的请求头和Cookie，最大化网站解锁效率。如有需要，您可以定义自己的请求头、Cookie和 HTTP 方法。

## 自定义标头

如果你需要使用自己的标头，可以通过添加 `context:force_headers` 参数并将其设置为 `true` 在提交抓取任务时。网页爬虫API会将你的自定义请求头与预定义请求头集合一起发送，然后使用它们访问网站。

#### 代码示例

```json
{
    "context": [
        {
            "key": "force_headers",
            "value": true
        },
        {
            "key": "请求头",
            "value": {
                "Accept-Language": "en-US,en;q=0.5"
            }
        }
    ]
    "source": "universal",
    "url": "https://example.com",
}
```

## 自定义 Cookie

如果你需要使用自己的 Cookie，可以通过添加以下内容来实现 `context:force_Cookie` 参数并将其设置为 `true` 在提交抓取任务时。网页爬虫API会将您的自定义Cookie与预定义的Cookie集一起发送，然后使用它们访问网站。如果您还想复用同一个代理 IP 地址，请查看 [代理会话](/products/cn/web-scraper-api/features/localization/proxy-location.md#sessions) 文档。

#### 代码示例

```json
{
    "context": [
        {
            "key": "force_Cookie",
            "value": true
        },
        {
            "key": "Cookie",
            "value": [
                {
                    "key": "NID", 
                    "value": "1234567890"
                }
            ]
        },
    ],
    "source": "universal",
    "url": "https://example.com",
}
```

## HTTP 方法

`universal` 源使用了 `GET` 默认的 HTTP 方法。

如果你需要向目标网站提交数据，必须将 HTTP 方法设置为 `POST` 并提供一个 Base64 编码的 `POST` 请求体。

**代码示例**

```json
[
    {
        "key": "http_method",
        "value": "post"
    },
    {
        "key": "content",
        "value": "base64EncodedPOSTBody"
    }
]
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://developers.oxylabs.io/products/cn/web-scraper-api/features/http-context-and-job-management/headers-cookies-method.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.