> 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/residential-proxies/session-control.md).

# 会话控制

## 设置默认会话

该 `sessid` 参数可让你通过同一 IP 地址路由多个请求。将 `sessid` 在你的 `username` 后面添加一个随机生成的字母数字字符串，例如 `sessid-abcd1234`.

{% embed url="<https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzrXw45naRpCZ0Ku9AjY1%2Fuploads%2FxR5NdybM3rjlbhAbPBZN%2Fsession-id.mp4?alt=media>" %}

例如，首次请求使用 `sessid-abcd1234` 时，可能会被分配到 IP `1.1.1.1`。只要你继续使用相同的会话 ID 发送请求，并且该 IP 保持在线，你的查询就会继续通过 `1.1.1.1`。如果你暂停 60 秒或该 IP 离线，系统会分配一个新的 IP，因此你下一次使用 `sessid-abcd1234` 时，会通过不同的 IP 路由，例如 `1.1.1.2`.

默认情况下，会话持续 10 分钟，或者在 60 秒内没有任何请求时结束——以先发生者为准。一旦发生这种情况，系统会自动分配新的 IP 地址。要更改会话长度，请参考 [**延长会话持续时间**](#extend-session-duration).

#### **凭据列表示例：**

该示例表示一组用于建立不同会话的凭据。

```
customer-USERNAME-cc-DE-sessid-qwert:PASSWORD
customer-USERNAME-cc-US-sessid-asdfg:PASSWORD
customer-USERNAME-cc-GB-sessid-zxcvb:PASSWORD
```

#### 代码示例

在此示例中，我们在 `sessid-abcd1234` 的用户名中使用德国 IP，并在首次请求中添加。后续所有请求都会继续使用相同的德国 IP 进行查询：

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

```shell
curl -x pr.oxylabs.io:7777 -U "customer-USERNAME-cc-DE-sessid-abcd1234:PASSWORD" https://ip.oxylabs.io/location
```

{% endtab %}

{% tab title="PHP" %}

```php
<?php
$username = 'USERNAME';
$password = 'PASSWORD';
$country = 'DE';
$session = mt_rand();
$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-cc-$country-sessid-$session:$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'
country = 'DE'
session = random.random()
entry = ('http://customer-%s-cc-%s-sessid-%s:%s@pr.oxylabs.io:7777' %
    (username, country, session, 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 java.io.*;
import java.util.Random;
import org.apache.http.HttpHost;
import org.apache.http.auth.*;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.fluent.Request;
import org.apache.http.client.methods.*;
import org.apache.http.impl.client.*;
import org.apache.http.impl.conn.BasicHttpClientConnectionManager;
import org.apache.http.util.EntityUtils;

class Client {
    public static final String username = "USERNAME";
    public static final String password = "PASSWORD";
    public String session_id = Integer.toString(new Random().nextInt(Integer.MAX_VALUE));
    public CloseableHttpClient client;

    public Client(String country) {
        String login = "customer-"+username+(country!=null ? "-cc-"+country : "")
            +"-sessid-" + session_id;
        HttpHost entry_node = new HttpHost("pr.oxylabs.io:7777");
        CredentialsProvider credentials_provider = new BasicCredentialsProvider();
        credentials_provider.setCredentials(new AuthScope(entry_node),
            new UsernamePasswordCredentials(login, password));
        client = HttpClients.custom()
            .setConnectionManager(new BasicHttpClientConnectionManager())
            .setProxy(entry_node)
            .setDefaultCredentialsProvider(credentials_provider)
            .build();
    }

    public String request(String url) throws IOException {
        HttpGet request = new HttpGet(url);
        CloseableHttpResponse response = client.execute(request);
        try {
            return EntityUtils.toString(response.getEntity());
        } finally { response.close(); }
    }

    public void close() throws IOException { client.close(); }
}

public class Example {
    public static void main(String[] args) throws IOException {
        Client client = new Client("de");
        try {
            System.out.println(client.request("https://ip.oxylabs.io/location"));
        } finally { client.close(); }
    }
}
```

{% endtab %}

{% tab title="C#" %}

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

class Client : WebClient
{
    public static string username = "USERNAME";
    public static string password = "PASSWORD";
    public string session_id = new Random().Next().ToString();

    public Client(string country_iso = null)
    {
        this.Proxy = new WebProxy("pr.oxylabs.io:7777");
        var login = "customer-"+username+(country_iso != null ? "-cc-"+country_iso : "")
            +"-sessid-"+session_id;
        this.Proxy.Credentials = new NetworkCredential(login, password);
    }

    protected override WebRequest GetWebRequest(Uri address)
    {
        var request = base.GetWebRequest(address) as HttpWebRequest;
        request.ConnectionGroupName = session_id;
        return request;
    }
}

class Example
{
    static void Main()
    {
        var client = new Client("de");
        Console.WriteLine(client.DownloadString("https://ip.oxylabs.io/location"));
    }
}
```

{% endtab %}

{% tab title="Ruby" %}

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

entry_node = 'pr.oxylabs.io'
entry_port = '7777'
username = 'USERNAME'
password = 'PASSWORD'
session_id = Random.rand(1000000)

uri = URI.parse("https://ip.oxylabs.io/location")
headers = {
    'Accept-Encoding' => 'gzip'
}

proxy = Net::HTTP::Proxy(entry_node, entry_port, "#{username}-cc-DE-sessid-#{session_id}", password)
http = proxy.new(uri.host,uri.port)

if uri.scheme == 'https'
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
end

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

result = http.start do |con|
    con.request(req)
end

puts result.body
```

{% endtab %}
{% endtabs %}

## 延长会话持续时间

sesstime 参数与 sessid 一起使用，用于将会话保持得比默认 10 分钟更久，或者在 60 秒无活动（无请求）后继续保持。

{% hint style="success" %}
**免责声明：** 你可以使用 `sesstime` 参数来 **将相同 IP 保持最长 1440 分钟** （24 小时）。不过，由于住宅代理池是动态的，你的连接可能会更早结束。如果发生这种情况，请使用新的会话参数开始一个会话。
{% endhint %}

{% hint style="warning" %}
**注意：** 会话时间参数并不保证所有请求都会在会话结束前完成。即使某些请求仍在进行中，一旦达到时间限制，会话也会过期。
{% endhint %}

#### **凭据列表示例：**

该示例表示一组建立不同会话的凭据，并具有不同的会话时长（分钟）。

```
customer-USERNAME-cc-DE-sessid-qwert-sesstime-10:PASSWORD
customer-USERNAME-cc-US-sessid-asdfg-sesstime-20:PASSWORD
customer-USERNAME-cc-GB-sessid-zxcvb-sesstime-30:PASSWORD
```

#### 代码示例

我们选择了与前一个示例相同的德国 IP，这次我们添加 `sessid` 字符串和 `sesstime` 参数，持续 7 分钟：

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

```shell
curl -x pr.oxylabs.io:7777 -U "customer-USERNAME-cc-DE-sessid-abcd1234-sesstime-7:PASSWORD" https://ip.oxylabs.io/location
```

{% endtab %}

{% tab title="PHP" %}

```php
<?php
$username = 'USERNAME';
$password = 'PASSWORD';
$country = 'DE';
$session = mt_rand();
$sesstime = 7;
$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-cc-$country-sessid-$session-sesstime-$sesstime:$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'
country = 'DE'
session = random.random()
sesstime = 7
entry = ('http://customer-%s-cc-%s-sessid-%s-sesstime-%d:%s@pr.oxylabs.io:7777' %
    (username, country, city, session, sesstime, 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 java.io.*;
import java.util.Random;
import org.apache.http.HttpHost;
import org.apache.http.auth.*;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.fluent.Request;
import org.apache.http.client.methods.*;
import org.apache.http.impl.client.*;
import org.apache.http.impl.conn.BasicHttpClientConnectionManager;
import org.apache.http.util.EntityUtils;

class Client {
    public static final String username = "USERNAME";
    public static final String password = "PASSWORD";
    public String session_id = Integer.toString(new Random().nextInt(Integer.MAX_VALUE));
    public String sesstime = "7";
    public CloseableHttpClient client;

    public Client(String country) {
        String login = "customer-"+username+(country_iso != null ? "-cc-"+country_iso : "")+"-sessid-"+session_id+"-sesstime-" +sesstime;
        HttpHost entry_node = new HttpHost("pr.oxylabs.io:7777");
        CredentialsProvider credentials_provider = new BasicCredentialsProvider();
        credentials_provider.setCredentials(new AuthScope(entry_node),
            new UsernamePasswordCredentials(login, password));
        client = HttpClients.custom()
            .setConnectionManager(new BasicHttpClientConnectionManager())
            .setProxy(entry_node)
            .setDefaultCredentialsProvider(credentials_provider)
            .build();
    }

    public String request(String url) throws IOException {
        HttpGet request = new HttpGet(url);
        CloseableHttpResponse response = client.execute(request);
        try {
            return EntityUtils.toString(response.getEntity());
        } finally { response.close(); }
    }

    public void close() throws IOException { client.close(); }
}

public class Example {
    public static void main(String[] args) throws IOException {
        Client client = new Client("de");
        try {
            System.out.println(client.request("https://ip.oxylabs.io/location"));
        } finally { client.close(); }
    }
}
```

{% endtab %}

{% tab title="C#" %}

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

class Client : WebClient
{
    public static string username = "USERNAME";
    public static string password = "PASSWORD";
    public string session_id = new Random().Next().ToString();

    public Client(string country_iso = null)
    {
        this.Proxy = new WebProxy("pr.oxylabs.io:7777");
        var login = "customer-"+username+(country_iso != null ? "-cc-"+country_iso : "")
            +"-sessid-"+session_id;
        this.Proxy.Credentials = new NetworkCredential(login, password);
    }

    protected override WebRequest GetWebRequest(Uri address)
    {
        var request = base.GetWebRequest(address) as HttpWebRequest;
        request.ConnectionGroupName = session_id;
        return request;
    }
}

class Example
{
    static void Main()
    {
        var client = new Client("de");
        Console.WriteLine(client.DownloadString("https://ip.oxylabs.io/location"));
    }
}
```

{% endtab %}

{% tab title="Ruby" %}

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

entry_node = 'pr.oxylabs.io'
entry_port = '7777'
username = 'USERNAME'
password = 'PASSWORD'
session_id = Random.rand(1000000)
sesstime = 7

uri = URI.parse("https://ip.oxylabs.io/location")
headers = {
    'Accept-Encoding' => 'gzip'
}

proxy = Net::HTTP::Proxy(entry_node, entry_port, "#{username}-cc-DE-sessid-#{session_id}-sesstime-#{sesstime}", password)
http = proxy.new(uri.host,uri.port)

if uri.scheme == 'https'
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
end

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

result = http.start do |con|
    con.request(req)
end

puts result.body
```

{% endtab %}
{% endtabs %}

## 控制会话 IP 轮换

该 `sessid_oneip` 参数是 `sessid` 的替代方案，适用于你必须在整个会话期间保持完全相同 IP 的情况。

使用常规的 `sessid`，如果分配的出口节点在会话时间结束前离线，系统会自动分配新的 IP，会话继续。使用 `sessid_oneip`时，会话会绑定到单个出口节点：一旦该 IP 不再可用，请求不会轮换到新 IP，而是返回 HTTP `502` 响应。此时，请使用新的 `sessid_oneip` 值重新开始一个新会话。 `sessid_oneip` 可以与 `sesstime` 像 sessid 一样组合使用。

{% hint style="info" %}
**注意：** `sessid_oneip` 是 `sessid`的一个可选替代方案。默认 `sessid` 行为（当出口节点失效时自动轮换到新的 IP）保持不变。
{% endhint %}

#### 凭据列表示例：

以下凭据各自建立一个单 IP 会话，具有不同的国家和会话时长：

```
customer-USERNAME-cc-DE-sessid_oneip-qwert-sesstime-10:PASSWORD
customer-USERNAME-cc-US-sessid_oneip-asdfg-sesstime-20:PASSWORD
customer-USERNAME-cc-GB-sessid_oneip-zxcvb-sesstime-30:PASSWORD
```

#### 代码示例

本示例使用德国（`DE`) IP，使用 `sessid_oneip-qwert` 以及一个 `sesstime` 10 分钟的会话时长。该 IP 在整个会话期间保持固定；如果它变得不可用，请求将返回 HTTP `502` ，而不是轮换：

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

```shell
curl -x pr.oxylabs.io:7777 -U "customer-USERNAME-cc-DE-sessid_oneip-qwert-sesstime-10:PASSWORD" https://ip.oxylabs.io/location
```

{% endtab %}
{% endtabs %}

若要使用其他语言，请从上面的任一 `sessid` 示例中选取一个，并将 `sessid` 替换为 `sessid_oneip` 登录字符串中的内容。


---

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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/dai-li/residential-proxies/session-control.md?ask=<question>&goal=<endgoal>
```

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