> For the complete documentation index, see [llms.txt](https://developers.oxylabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.oxylabs.io/products/cn/proxies/datacenter-proxies/free-datacenter-ips.md).

# 免费数据中心 IP

免费数据中心 IP 便于轻松测试 Oxylabs 代理。不过，如需完整产品功能和灵活性，建议迁移到付费方案。

{% hint style="info" %}
集成免费的数据中心 IP 遵循与我们的标准流程相同的流程 [**数据中心代理**](/products/cn/proxies/datacenter-proxies.md).
{% endhint %}

在我们的平台上注册后，进入你的仪表板并创建一个代理用户。此步骤会激活你的免费套餐 1 个月。

创建代理用户后，系统会弹出一个提示框，显示你的第一次测试请求，用于获取一个随机 IP。\
复制它并更改 `USERNAME` 和 `PASSWORD` 参数更改为你的代理凭证：

```bash
curl -x dc.oxylabs.io:8000 -U "user-USERNAME:PASSWORD" https://ip.oxylabs.io/location
```

请在下面的其他编程语言中查看更多代码示例：

{% tabs %}
{% tab title="cURL" %}

```sh
curl -x dc.oxylabs.io:8000 -U "user-USERNAME:PASSWORD" https://ip.oxylabs.io/location 
```

{% endtab %}

{% tab title="Python" %}

```python
#pip install requests
import requests

username = 'USERNAME'
密码 = 'PASSWORD'
proxy = 'dc.oxylabs.io:8000'

代理 = {
   "https": ('https://user-%s:%s@%s' % (username, password, proxy))
}

response=requests.get("https://ip.oxylabs.io/location", proxies=proxies)

print(response.content)
```

{% endtab %}

{% tab title="Node.js" %}

<pre class="language-javascript"><code class="lang-javascript"><strong>//npm install axios
</strong><strong>const axios = require("axios");
</strong>const https = require("https");

const client = axios.create({
    httpsAgent: new https.Agent({
        rejectUnauthorized: false,
    }),
});
const username = 'USERNAME';
const password = 'PASSWORD'

client
    .get("https://ip.oxylabs.io/location", {
        proxy: {
            protocol: "https",
            host: "dc.oxylabs.io",
            port: 8000,
            auth: {
                username: `user-${username}`,
                password: password,
            },
        },
    })
    .then((res) => {
        console.log(res.data);
    })
    .catch((err) => console.error(err));

</code></pre>

{% endtab %}

{% tab title="PHP" %}

```php
<?php

$username = 'USERNAME';
$password = 'PASSWORD';
$proxy = 'dc.oxylabs.io:8000';
$target = 'https://ip.oxylabs.io/location';

$request = curl_init($target);
curl_setopt($request, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($request, CURLOPT_PROXY, $proxy);
curl_setopt($request, CURLOPT_PROXYUSERPWD, "user-$username:$password");
$responseBody = curl_exec($request);
$error = curl_error($request);
curl_close($request);

if ($responseBody !== false) {
    echo 'Response: ' . $responseBody;
} else {
    echo 'Failed to connect to proxy: ' . $error;
}
```

{% endtab %}

{% tab title="Go" %}

```go
package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	username, password, entry := "USERNAME", "PASSWORD", "dc.oxylabs.io:8000"
	proxy, err := url.Parse(fmt.Sprintf("https://user-%s:%s@%s", username, password, entry))
	if err != nil {
		panic(err)
	}

	transport := &http.Transport{
		Proxy: http.ProxyURL(proxy),
	}
	client := &http.Client{Transport: transport}
	target := "https://ip.oxylabs.io/location"
	response, err := client.Get(target)
	if err != nil {
		panic(err)
	}
	defer response.Body.Close()

	body, err := io.ReadAll(response.Body)
	if err != nil {
		panic(err)
	}

	fmt.Println("Response:")
	fmt.Println(string(body))
}
```

{% endtab %}

{% tab title="Java" %}

```java
package com.example;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Base64;

import org.apache.hc.client5.http.fluent.Request;
import org.apache.hc.core5.http.HttpHost;

public class App {
    public static void main(String[] args) throws IOException, URISyntaxException {
        String target = "http://ip.oxylabs.io/location";
        String username = "USERNAME";
        String password = "PASSWORD";
        String proxy = "dc.oxylabs.io:8000";

        URI proxyURI = new URI(String.format("https://user-%s:%s@%s", username, password, proxy));

        String basicAuth = new String(
                Base64.getEncoder()
                        .encode(
                                proxyURI.getUserInfo().getBytes()));
        String response = Request.get(target)
                .addHeader("Proxy-Authorization", "Basic " + basicAuth)
                .viaProxy(HttpHost.create(proxyURI))
                .execute().returnContent().asString();

        System.out.println(response);
    }
}

```

{% endtab %}

{% tab title="C#" %}

```csharp
using System.Net;

// .NET 目前不支持 HTTPS 代理
var proxy = new WebProxy {
    Address = new Uri("dc.oxylabs.io:8000"),
    Credentials = new NetworkCredential(
        userName: "user-USERNAME",
        password: "PASSWORD"
    )
};

var httpClientHandler = new HttpClientHandler {Proxy = proxy};

using var client = new HttpClient(handler: httpClientHandler, disposeHandler: true);

var result = await client.GetStringAsync("https://ip.oxylabs.io/location");
Console.WriteLine(result);
```

{% endtab %}
{% endtabs %}

### 重要说明

#### **无需指定位置**

免费 IP 会自动分配，并提供有限的地理位置选项。 **全部 5 个 IP 都位于美国境内。** 无法选择位置，因此你 **无需在请求中包含特定的位置参数** 。

#### **认证方式**

你可以使用用户名和密码或 IP 白名单进行认证。无论你选择哪种方式， **都适用公平使用政策。**

#### **公平使用政策**

为确保我们服务的稳定性并防止潜在的流量滥用，我们已对免费的数据中心 IP 实施以下限制：

* **流量限制：** 免费套餐包含每个用户在激活后 1 个月内，覆盖全部 5 个 IP 的总计 5 GB 流量限制。此额度不会续期。
* **并发会话：** 为确保服务稳定并防止滥用，每个用户最多限制 20 个并发线程（会话）。
* **固定 IP：** 免费的数据中心 IP 是固定的，无法更换或刷新。如果你需要新的或不同的 IP，请考虑升级到付费套餐。


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://developers.oxylabs.io/products/cn/proxies/datacenter-proxies/free-datacenter-ips.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
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