Request/Response Handling
This section outlines the process of constructing and parsing HTTP requests and responses within docker-py.
Request Construction
Requests are constructed using the requests library. The requests library provides a simple and elegant API for making HTTP requests. It handles all the low-level details of HTTP communication, such as encoding and decoding data, and managing connection pools.
Example:
import requests
response = requests.get('https://api.example.com/v1/containers')
This code snippet sends a GET request to the https://api.example.com/v1/containers endpoint and stores the response in the response variable.
Response Parsing
Responses are parsed using the json library. The json library provides a simple and efficient way to parse JSON data.
Example:
import json
response_data = json.loads(response.text)
This code snippet converts the response text (in JSON format) to a Python dictionary.
API Endpoints
The following API endpoints are supported by docker-py:
/containers: Lists all containers./containers/{id}: Retrieves information about a specific container./containers/create: Creates a new container./containers/{id}/start: Starts a container./containers/{id}/stop: Stops a container./containers/{id}/restart: Restarts a container./containers/{id}/kill: Kills a container./containers/{id}/pause: Pauses a container./containers/{id}/unpause: Unpauses a container./containers/{id}/rename: Renames a container./containers/{id}/delete: Deletes a container.
Error Handling
Error handling is implemented using the requests library’s exceptions module. This module provides a set of exceptions that can be raised during HTTP requests.
Example:
import requests
try:
response = requests.get('https://api.example.com/v1/containers')
except requests.exceptions.RequestException as e:
print(f"An error occurred: {e}")
This code snippet attempts to send a GET request to the https://api.example.com/v1/containers endpoint. If an error occurs, the RequestException is caught and printed to the console.
Authentication
Authentication is handled using the docker-py library’s DockerClient class. The DockerClient class provides methods for authenticating with the Docker API.
Example:
from docker import DockerClient
client = DockerClient(base_url='https://api.example.com', version='1.38')
This code snippet creates a DockerClient object and connects to the Docker API at https://api.example.com. The version parameter specifies the version of the Docker API to use.
Conclusion
The docker-py library provides a comprehensive set of tools for interacting with the Docker API. The library simplifies the process of constructing and parsing HTTP requests and responses, and provides robust error handling and authentication mechanisms.
