Understanding the aiohttp Response Object in Python

Mar 3, 2024 ยท 2 min read

The aiohttp response object contains all the information sent back from a web server after an aiohttp request. Getting familiar with the response object helps you better handle and process responses in your asynchronous Python code.

When you make a request using aiohttp, such as:

async with aiohttp.ClientSession() as session:
    async with session.get('https://api.example.com') as response:
        # response object returned here

The object returned and assigned to the response variable contains the full HTTP response from the server. Some key attributes and methods of the aiohttp response object include:

  • response.status - The HTTP status code, like 200, 404, 500, etc.
  • response.headers - A case-insensitive multi-dict containing all the response headers.
  • response.content - The response body as bytes.
  • response.text() - An async method to return the response body as a string.
  • response.json() - An async method to return the JSON-decoded response body.
  • So for example, you can print the response status code, get a header value, and process the JSON response body with:

    content_type = response.headers['Content-Type']
    data = await response.json()

    The response object also contains some convenience properties like response.ok which returns True if the status code is 200-299.

    When handling responses, be sure to:

  • Check the status code to confirm the request was successful
  • Handle any encoding specified in the Content-Type header
  • Gracefully handle errors and exceptions in the response
  • Working with the aiohttp response object helps make it easier to write asynchronous Python clients and web applications. The key is becoming familiar with accessing response attributes like the status, headers, content, and using async methods like .text() and .json() to parse response bodies.

    Browse by tags:

    Browse by language:

    The easiest way to do Web Scraping

    Get HTML from any page with a simple API call. We handle proxy rotation, browser identities, automatic retries, CAPTCHAs, JavaScript rendering, etc automatically for you

    Try ProxiesAPI for free

    curl "http://api.proxiesapi.com/?key=API_KEY&url=https://example.com"

    <!doctype html>
        <title>Example Domain</title>
        <meta charset="utf-8" />
        <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1" />


    Don't leave just yet!

    Enter your email below to claim your free API key: