Lære HTTP Basics in Python | UDP and HTTP Communication

Understanding how the Hypertext Transfer Protocol (HTTP) works is essential for interacting with web servers using Python. HTTP is the foundation of data communication on the World Wide Web. When you visit a website or use an API, your computer sends an HTTP request to a server, which then sends back an HTTP response. Each HTTP transaction consists of a request sent by the client (your computer) and a response returned by the server. The request specifies what resource you want, and the response contains the data or an error message, along with status information.


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import socket

# Connect to example.com on port 80 (HTTP)
host = "example.com"
port = 80

# Create a TCP socket
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((host, port))
    # Prepare a simple HTTP GET request
    request = "GET / HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\n\r\n"
    s.sendall(request.encode())
    # Receive the response data in chunks
    response = b""
    while True:
        data = s.recv(4096)
        if not data:
            break
        response += data
    # Print the HTTP response as text
    print(response.decode(errors="replace"))

The code above demonstrates how to use Python's socket module to make a basic HTTP GET request. An HTTP request consists of a request line (GET / HTTP/1.1), followed by headers such as Host and Connection, and is terminated by an empty line (\r\n\r\n). The server responds with an HTTP response, which includes a status line (like HTTP/1.1 200 OK), response headers, a blank line, and then the response body (such as the HTML for a web page). When you send this request, the server returns the full HTTP response, which you can display or process as needed.

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              123456789101112131415161718192021
            
import socket

# Connect to example.com on port 80 (HTTP)
host = "example.com"
port = 80

# Create a TCP socket
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((host, port))
    # Prepare a simple HTTP GET request
    request = "GET / HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\n\r\n"
    s.sendall(request.encode())
    # Receive the response data in chunks
    response = b""
    while True:
        data = s.recv(4096)
        if not data:
            break
        response += data
    # Print the HTTP response as text
    print(response.decode(errors="replace"))

Var alt klart?

Tak for dine kommentarer!

Sektion 3. Kapitel 2