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🗣 Wd提问: requests proxy python

🤖 Ai回答: In Python, the `requests` library is a popular HTTP client that allows you to send HTTP requests easily、To use proxies with the `requests` library, you can specify proxy settings when making requests、This is useful for scenarios such as bypassing firewalls, anonymizing requests, or accessing content through a specific network.

Key Concepts:
1、Proxies: A proxy server acts as an intermediary between your application and the target server、You can configure `requests` to route traffic through a proxy.
2、HTTP/HTTPS Proxies: Proxies can be configured for both HTTP and HTTPS protocols.
3、Authentication: Some proxies require authentication (username and password).

Basic Usage of Proxies in `requests`

Here's how you can use proxies with the `requests` library:

1、Simple Proxy Configuration
You can specify a proxy using the `proxies` parameter in the `requests` methods (`get`, `post`, etc.).

python
import requests

Define the proxy URL
proxies = {
'http': 'http://proxy.example.com:8080',
'https': 'https://proxy.example.com:8080'
}

Make a request using the proxy
response = requests.get('https://example.com', proxies=proxies)

print(response.status_code)
print(response.text)

Explanation:
The `proxies` dictionary specifies the proxy URLs for both HTTP and HTTPS requests.
The `requests.get` method uses the specified proxies to make the request.

2、Using Authentication with Proxies
If your proxy requires authentication (e.g., username and password), you can include it in the proxy URL.

python
import requests

Define the proxy URL with authentication
proxies = {
'http': 'http://username:password@proxy.example.com:8080',
'https': 'https://username:password@proxy.example.com:8080'
}

Make a request using the proxy with authentication
response = requests.get('https://example.com', proxies=proxies)

print(response.status_code)
print(response.text)

3、Using Environment Variables
Alternatively, you can set proxy information via environment variables、The `requests` library will automatically pick up these variables if they are defined.

bash
export HTTP_PROXY=http://proxy.example.com:8080
export HTTPS_PROXY=https://proxy.example.com:8080

Then, in your Python script:

python
import requests

No need to specify proxies explicitly; requests will use the environment variables
response = requests.get('https://example.com')

print(response.status_code)
print(response.text)

4、Disabling Proxies for Specific Hosts
You can also define a list of hosts for which no proxy should be used by setting the `no_proxy` environment variable.

bash
export NO_PROXY=localhost,127.0.0.1,.localdomain

Or programmatically:

python
import os

os.environ['NO_PROXY'] = 'localhost,127.0.0.1,.localdomain'

Now requests will not use proxies for localhost or .localdomain
response = requests.get('http://localhost')

5、Advanced Proxy Configuration
For more advanced configurations, such as custom proxy handlers or SOCKS proxies, you might need additional libraries like `requests[socks]`.

Example with SOCKS Proxy:
To use a SOCKS proxy, you need to install the `requests[socks]` package:

bash
pip install requests[socks]

Then, you can use SOCKS proxies as follows:

python
import requests

Define the SOCKS proxy
proxies = {
'http': 'socks5://user:pass@host:port',
'https': 'socks5://user:pass@host:port'
}

Make a request using the SOCKS proxy
response = requests.get('https://example.com', proxies=proxies)

print(response.status_code)
print(response.text)

Summary
Use the `proxies` parameter in `requests` methods to specify proxy URLs.
Include authentication in the proxy URL if required.
Alternatively, set proxy information via environment variables.
Use `NO_PROXY` to exclude specific hosts from using proxies.
For SOCKS proxies, install `requests[socks]` and specify the proxy accordingly.

This approach provides flexibility in handling different proxy requirements while keeping your code clean and maintainable.

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提问时间: 2025-09-17 22:33:26

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