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reqvsaiohttp

MIT 31 1 3,893
58.1 thousand (month) May 18 2023 v3.42.3(a month ago)
14,369 30 496 Apache 2
3.9.3(21 days ago) Jul 26 2019 106.2 million (month)

The Go library "req" is a simple and easy-to-use library for making HTTP requests in Go. It is designed to make working with HTTP requests as simple as possible, by providing a clean and consistent API for handling various types of requests, including GET, POST, PUT, and DELETE.

One of the key features of req is its support for handling JSON data. The library automatically serializes and deserializes JSON data, making it easy to work with JSON data in your Go applications. Additionally, it supports multipart file uploads and automatic decompression of gzip and deflate encoded responses.

req also includes a number of convenience functions for working with common HTTP request types, such as sending GET and POST requests, handling redirects, and setting headers and query parameters. The library can also be easily extended with custom middleware and request handlers.

Overall, req is a powerful and flexible library that makes it easy to work with HTTP requests in Go. It is well-documented and actively maintained, making it a great choice for any Go project that needs to work with HTTP requests.

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. It provides a simple API for making HTTP requests and handling both client and server functionality. Like the requests package, aiohttp is designed to be easy to use and handle many of the low-level details of working with HTTP.

The main benefit of aiohttp over requests is that it is built on top of the asyncio library, which means that it can handle many requests at the same time without blocking the execution of your program. This can lead to significant performance improvements when making many small requests, or when dealing with slow or unreliable network connections.

aiohttp provides both client and server side functionality, so you can use it to create web servers and handle client requests in a non-blocking manner. It also supports WebSocket protocol, so it can be used for building real-time application like chat, game, etc.

aiohttp also provide several features for handling connection errors, managing timeouts, and client sessions. It also provide similar features like requests package like redirect handling, cookies, and support for several authentication modules.

You can install aiohttp via pip package manager:

pip install aiohttp

In terms of API design, aiohttp is similar to requests and thus should be familiar to anyone who has used the requests library, but it provides an async with block to manage the context of the connection and used await statement to wait for the result.

It''s worth noting that aiohttp is built on top of asyncio and is designed to be used in Python 3.5 and above. It provides the same functionality as httpx but it is specifically built for the asyncio framework.

Highlights


asynciowebsocketshttp2http-servermulti-partresponse-streaminghttp-proxy

Example Use


req.DevMode() //  Use Client.DevMode to enable debugging details

// There are 2 ways to use req (like many other http clients)
// First way is to create a persistent session client:
client := req.C(). // defaults like timeout and headers can be set for the whole session
    SetUserAgent("my-custom-client").
    SetTimeout(5 * time.Second)
// defaults can be overriden and extended in each request
resp, err := client.R(). // Use R() to create a request and set with chainable request settings.
    SetHeader("Accept", "application/vnd.github.v3+json").
    SetPathParam("username", "imroc").
    SetQueryParam("page", "1").
    SetResult(&result). // Unmarshal response into struct automatically if status code >= 200 and <= 299.
    SetError(&errMsg). // Unmarshal response into struct automatically if status code >= 400.
    EnableDump(). // Enable dump at request level to help troubleshoot, log content only when an unexpected exception occurs.
    Get("https://api.github.com/users/{username}/repos")

// Alternatively, it can be used as is without establishing a client

resp := client.Get("https://api.github.com/users/{username}/repos"). // Create a GET request with specified URL.
    SetHeader("Accept", "application/vnd.github.v3+json").
    SetPathParam("username", "imroc").
    SetQueryParam("page", "1").
    SetResult(&result).
    SetError(&errMsg).
    EnableDump().
    Do() // Send request with Do.
import asyncio
from aiohttp import ClientSession, WSMsgType

# aiohttp only provides async client so we must use a coroutine:
async def run():
    async with ClientSession(headers={"User-Agent": "webscraping.fyi"}) as session:
        # we can use the session to make requests:
        response = await session.get("http://httpbin.org/headers")
        print(response.status)
        # note: to read the response body we must use await:
        print(await response.text())

        # aiohttp also comes with convenience methods for common requests:
        # POST json
        resp = await session.post("http://httpbin.org/post", json={"key": "value"})
        # POST form data
        resp = await session.post("http://httpbin.org/post", data={"key": "value"})
        # decode response as json
        resp = await session.get("http://httpbin.org/json")
        data = await resp.json()
        print(data)

        # aiohttp also supports websocket connections
        # which can be used to scrape websites that use websockets:
        async with session.ws_connect("http://example.org/ws") as ws:
            async for msg in ws:
                if msg.type == WSMsgType.TEXT:
                    if msg.data == "close cmd":
                        await ws.close()
                        break
                    else:
                        await ws.send_str(msg.data + "/answer")
                elif msg.type == WSMsgType.ERROR:
                    break


asyncio.run(run())

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