> 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/dai-li/mobile-proxies/making-requests.md).

# 发起请求

## 基本查询

基本查询只需要传入 `用户名` 和 `密码`。不需要其他参数。这样的查询会导致请求从随机 IP 地址（代理）发出。每个新请求都会使用不同的代理。

#### 代码示例

在此示例中，对 `ip.oxylabs.io` 从随机 IP 执行：

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

```shell
curl -x pr.oxylabs.io:7777 -U "customer-USERNAME:PASSWORD" https://ip.oxylabs.io/location
```

{% endtab %}

{% tab title="PHP" %}

```php
<?php
$username = 'USERNAME';
$password = 'PASSWORD';
$proxy = 'pr.oxylabs.io:7777';
$query = curl_init('https://ip.oxylabs.io/location');
curl_setopt($query, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($query, CURLOPT_PROXY, "http://$proxy");
curl_setopt($query, CURLOPT_PROXYUSERPWD, "customer-$username:$password");
$output = curl_exec($query);
curl_close($query);
if ($output)
    echo $output;
?>
```

{% endtab %}

{% tab title="Python" %}

```python
import urllib.request
import random
username = 'USERNAME'
password = 'PASSWORD'
entry = ('http://customer-%s:%s@pr.oxylabs.io:7777' %
    (username, password))
query = urllib.request.ProxyHandler({
    'http': entry,
    'https': entry,
})
execute = urllib.request.build_opener(query)
print(execute.open('https://ip.oxylabs.io/location').read())
```

{% endtab %}

{% tab title="Java" %}

```java
package example;

import org.apache.http.HttpHost;
import org.apache.http.client.fluent.*;

public class Example {
    public static void main(String[] args) throws Exception {
        HttpHost entry = new HttpHost("pr.oxylabs.io", 7777);
        String query = Executor.newInstance()
            .auth(entry, "customer-USERNAME", "PASS")
            .execute(Request.Get("http://ip.oxylabs.io/location").viaProxy(entry))
            .returnContent().asString();
        System.out.println(query);
    }
}
```

{% endtab %}

{% tab title="C#" %}

```csharp
using System;
using System.Net;

class Example
{
    static void Main()
    {
        var client = new WebClient();
        client.Proxy = new WebProxy("pr.oxylabs.io:7777");
        client.Proxy.Credentials = new NetworkCredential("customer-USERNAME", "PASSWORD");
        Console.WriteLine(client.DownloadString("https://ip.oxylabs.io/location"));
    }
c
```

{% endtab %}

{% tab title="Ruby" %}

```ruby
require 'uri'
require 'net/http'

uri = URI.parse('https://ip.oxylabs.io/location')
proxy = Net::HTTP::Proxy('pr.oxylabs.io', 7777, 'customer-USERNAME', 'PASSWORD')

req = Net::HTTP::Get.new(uri.path)

result = proxy.start(uri.host,uri.port) do |http|
    http.request(req)
end

puts result.body
```

{% endtab %}
{% endtabs %}

单个 backconnect 代理允许你通过用户名中的附加参数选择特定国家的代理。此方法也支持会话控制。下面是凭据结构示例：

`customer-USERNAME-cc-US-sessid-abcde12345:PASSWORD`

#### 查询参数

| 参数                                                        | 说明                                                                                                                                                                                                                                                                         |
| --------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <mark style="background-color:green;">**customer**</mark> | 用户名                                                                                                                                                                                                                                                                        |
| `cc`                                                      | 不区分大小写的两字母国家代码 [**3166-1 alpha-2 格式**](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2). 例如， `DE` 表示德国， `GB` 表示英国， `TH` 表示泰国。有关如何使用特定国家/地区代理的更多详情，请参阅 [**此处**](/products/cn/dai-li/mobile-proxies/location-settings/country.md#country-specific-entry-nodes).             |
| `city`                                                    | 不区分大小写的英文城市名称。为提高准确性，此参数必须与 `cc` 一起使用，例如， `cc-GB-city-london` 表示英国伦敦； `cc-DE-city-berlin` 表示德国柏林。对于包含两个以上单词的城市，请将空格替换为 `_`，例如， `city-st_petersburg` 或 `city-rio_de_janeiro`. 点击 [**此处**](/products/cn/dai-li/mobile-proxies/location-settings/select-city.md) 了解更多城市级定向信息。 |
| `st`                                                      | 不区分大小写的美国州名，前缀为 us\_，例如， `us_california`, `us_illinois`. [**点击此处**](/products/cn/dai-li/mobile-proxies/location-settings/select-state.md) 了解更多州级定向信息。                                                                                                                      |
| `sessid`                                                  | 会话 ID，用于在后续查询中保持相同 IP。会话在 10 分钟后过期。之后，该会话 ID 会分配新的 IP 地址。支持随机字符串、0-9 和 A-Z 字符。                                                                                                                                                                                             |
| `sesstime`                                                | 会话时长参数可在指定时间内保持相同 IP。最长会话时长为 30 分钟。                                                                                                                                                                                                                                        |
| <mark style="background-color:green;">**密码**</mark>       | 密码                                                                                                                                                                                                                                                                         |

&#x20;     \- 必填参数


---

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

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