What tools have you used for working with the HTTP…

For analyzing and debugging HTTP requests/responses on the client and server side, I used the following tools:

On the client side:

Browser developer tools:
- The "Network" tab (F12 in Chrome, Firefox, Edge) to view all HTTP requests, their parameters, headers, body, response times, and statuses.
- Ability to send modified requests (Headers, Body).
Postman: A powerful tool for manual and automated API testing. It allows creating, sending, and grouping HTTP requests (GET, POST, PUT, DELETE, etc.), viewing responses, and creating scripts for validation and automation.
Insomnia: An alternative to Postman, similar in functionality but more convenient for some tasks.

curl: A command-line tool for sending HTTP requests and receiving responses. Useful for scripts and automation.

curl -v -X GET "https://example.com/api/resource" -H "Accept: application/json"
# -v: verbose output
# -X GET: HTTP method
# -H: add header

On the server side / Proxy:

Charles Proxy / Fiddler: Tools that work as intercepting proxy servers. They allow viewing and modifying HTTP/HTTPS traffic between client and server. Very useful for debugging and monitoring.
tcpdump / Wireshark: Low-level network protocol analyzers. Wireshark with a graphical interface allows detailed analysis of packets, including HTTP. Used for deep network diagnostics.
Server logs: Analyzing web server logs (Apache, Nginx) or application logs to get information about incoming HTTP requests, response statuses, and errors.

For automated testing:

Rest-Assured (Java): A library for writing automated API tests. It makes it easy to construct requests, send them, and verify responses.

given()
    .contentType(ContentType.JSON)
    .body("{ \"name\": \"test\" }")
.when()
    .post("/api/resource")
.then()
    .statusCode(201)
    .body("id", notNullValue());

HTTParty (Ruby): A library for interacting with APIs in Ruby.

response = HTTParty.get('https://example.com/api/resource')
puts response.code
puts response.body

Requests (Python): A popular library for working with HTTP in Python.

import requests

response = requests.get('https://example.com/api/resource')
print(response.status_code)
print(response.json())

The choice of tool depended on the specific task: browser debugging, manual API testing, traffic monitoring, low-level analysis, or automation.

What tools have you used for working with the HTTP protocol?