Fake User Agent Python

Fake User Agent Python

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pip install fake_user_agent

Copy PIP instructions

Randomly generates a useragent for fetching a web page without a browser.

View statistics for this project via Libraries.io , or by using our public dataset on Google BigQuery

Tags

python,

useragent,

http,

header

Randomly generate a fake useragent.
This project's idea is inspired by fake-useragent . I rewrote the whole codes in order to boost performance by:
Supported browsers are: chrome, edge, firefox, safari, and opera. Browser name is case insensitive. Some other possible spellings of each browser are mapped to the right one (e.g. "ie" -> "edge", "google" -> "chrome").
On your terminal, just simply enter fakeua

In your python script, import the function. Every time you run the script, the useragent value will be different.

View statistics for this project via Libraries.io , or by using our public dataset on Google BigQuery

Tags

python,

useragent,

http,

header

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Uploaded Aug 28, 2022

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How to fake a User Agent in Python March 25, 2020 April 22, 2021
import requests

user_agent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36'

response = requests.get( 'https://ao.gl' , headers={ 'User-Agent' : user_agent})
html = response.content
print(response.content)

import urllib.request

user_agent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36'

request = urllib.request.Request( 'https://ao.gl' , headers={ 'User-Agent' : user_agent})
response = urllib.request.urlopen(request)
html = response.read()

See also Returning Highest and Lowest in Python

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A User-Agent is a bunch of text that is sent with every HTTP and HTTPS request. The server processing this request is able to determine what type of device and browser has made the request.
Often times servers use this parameter to restrict access to the resource.
However, it’s easy to fake a User-Agent when using Python to make HTTP and HTTPS requests.
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By Python Linux

Post date

05/22/2022

No Comments on How to fake and rotate User Agents using Python 3

DOWNLOADER_MIDDLEWARES = {
'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware' : None ,
'scrapy_useragents.downloadermiddlewares.useragents.UserAgentsMiddleware' : 500 ,
}

USER_AGENTS = [
( 'Mozilla/5.0 (X11; Linux x86_64) '
'AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/57.0.2987.110 '
'Safari/537.36' ), # chrome
( 'Mozilla/5.0 (X11; Linux x86_64) '
'AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/61.0.3163.79 '
'Safari/537.36' ), # chrome
( 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:55.0) '
'Gecko/20100101 '
'Firefox/55.0' ), # firefox
( 'Mozilla/5.0 (X11; Linux x86_64) '
'AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/61.0.3163.91 '
'Safari/537.36' ), # chrome
( 'Mozilla/5.0 (X11; Linux x86_64) '
'AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/62.0.3202.89 '
'Safari/537.36' ), # chrome
( 'Mozilla/5.0 (X11; Linux x86_64) '
'AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/63.0.3239.108 '
'Safari/537.36' ), # chrome
]

Tags

python 3 , scrape , user agent

To rotate user agents in Python here is what you need to do
There are different methods to do it depending on the level of blocking you encounter.
A user agent is a string that a browser or application sends to each website you visit. A typical user agent string contains details like – the application type, operating system, software vendor, or software version of the requesting software user agent. Web servers use this data to assess the capabilities of your computer, optimizing a page’s performance and display. User-Agents are sent as a request header called “User-Agent”.
User-Agent: Mozilla/ () ()
Below is the User-Agent string for Chrome 83 on Mac Os 10.15
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36
Before we look into rotating user agents, let’s see how to fake or spoof a user agent in a request.
Most websites block requests that come in without a valid browser as a User-Agent. For example here are the User-Agent and other headers sent for a simple python request by default while making a request.
Ignore the X-Amzn-Trace-Id as it is not sent by Python Requests, instead generated by Amazon Load Balancer used by HTTPBin.
Any website could tell that this came from Python Requests, and may already have measures in place to block such user agents. User-agent spoofing is when you replace the user agent string your browser sends as an HTTP header with another character string. Major browsers have extensions that allow users to change their User-agent.
We can fake the user agent by changing the User-Agent header of the request and bypass such User-Agent based blocking scripts used by websites.
To change the User-Agent using Python Requests, we can pass a dict with a key ‘User-Agent’ with the value as the User-Agent string of a real browser,
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36
As before lets ignore the headers that start with X- as they are generated by Amazon Load Balancer used by HTTPBin, and not from what we sent to the server
But, websites that use more sophisticated anti-scraping tools can tell this request did not come from Chrome.
Although we had set a user agent, the other headers that we sent are different from what the real chrome browser would have sent.
Here is what real Chrome would have sent
It is missing these headers chrome would sent when downloading an HTML Page or has the wrong values for it
Anti Scraping Tools can easily detect this request as a bot a so just sending a User-Agent wouldn’t be good enough to get past the latest anti-scraping tools and services.
Let’s add these missing headers and make the request look like it came from a real chrome browser
Now, this request looks more like it came from Chrome 83, and should get you past most anti scraping tools – if you are not flooding the website with requests.
If you are making a large number of requests for web scraping a website, it is a good idea to randomize. You can make each request you send look random, by changing the exit IP address of the request using rotating proxies and sending a different set of HTTP headers to make it look like the request is coming from different computers from different browsers
If you are just rotating user agents. The process is very simple.
To rotate user agents in Scrapy, you need an additional middleware. There are a few Scrapy middlewares that let you rotate user agents like:
Our example is based on Scrapy-UserAgents.
Add in settings file of Scrapy add the following lines
Most of the techniques above just rotates the User-Agent header, but we already saw that it is easier for bot detection tools to block you when you are not sending the other correct headers for the user agent you are using.
To get better results and less blocking, we should rotate a full set of headers associated with each User-Agent we use. We can prepare a list like that by taking a few browsers and going to https://httpbin.org/headers and copy the set headers used by each User-Agent. (Remember to remove the headers that start with X- in HTTPBin)
Browsers may behave differently to different websites based on the features and compression methods each website supports. A better way is
In order to make your requests from web scrapers look as if they came from a real browser:
Having said that, let’s get to the final piece of code
You cannot see the order in which the requests were sent in HTTPBin, as it orders them alphabetically.
There you go! We just made these requests look like they came from real browsers.
Rotating user agents can help you from getting blocked by websites that use intermediate levels of bot detection, but advanced anti-scraping services has a large array of tools and data at their disposal and can see past your user agents and IP address.
You can learn more on this topic here How do websites detect web scrapers and other bots.
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I want to get the content from this website.
If I use a browser like Firefox or Chrome I could get the real website page I want, but if I use the Python requests package (or wget command) to get it, it returns a totally different HTML page.
I thought the developer of the website had made some blocks for this.
How do I fake a browser visit by using python requests or command wget?
Trending sort is based off of the default sorting method — by highest score — but it boosts votes that have happened recently, helping to surface more up-to-date answers.
It falls back to sorting by highest score if no posts are trending.
FYI, here is a list of User-Agent strings for different browsers:
As a side note, there is a pretty useful third-party package called fake-useragent that provides a nice abstraction layer over user agents:
Up to date simple useragent faker with real world database
Try doing this, using firefox as fake user agent (moreover, it's a good start
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Fake User Agent Python

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