You have been tasked with building a URL file validator for a web crawler. A web crawler is an application that fetches a web page, extracts the URLs present in that page, and then recursively fetches new pages using the extracted URLs. The end goal of a web crawler is to collect text data, images, or other resources present in order to validate resource URLs or hyperlinks on a page. URL validators can be useful to validate if the extracted URL is a valid resource to fetch. In this scenario, you will build a URL validator that checks for supported protocols and file types.
What you need to do?
1. Writing detailed comments and docstrings
2. Organizing and structuring code for readability
3. URL = :///
Steps for Completion
Task
Create two lists of strings - one list for Protocol called valid_protocols, and one list for storing File extension called valid_ftleinfo . For this take the protocol list should be restricted to http , https and ftp. The file extension list should be hrl. and docx CSV.
Split an input named url, and then use the first element to see whether the protocol of the URL is in valid_protocols. Similarly, check whether the URL contains a valid file_info.
Task
Write the conditions to return a Boolean value of True if the URL is valid, and False if either the Protocol or the File extension is not valid.
main.py х +
1 def validate_url(url):
2 *****Validates the given url passed as string.
3
4 Arguments:
5 url --- String, A valid url should be of form :///
6
7 Protocol = [http, https, ftp]
8 Hostname = string
9 Fileinfo = [.html, .csv, .docx]
10 ***
11 # your code starts here.
12
13
14
15 return # return True if url is valid else False
16
17
18 if
19 name _main__': url input("Enter an Url: ")
20 print(validate_url(url))
21
22
23
24
25

Answer:

Python Code:

def validate_url(url):

#Creating the list of valid protocols and file name extensions

valid_protocols = ['http', 'https', 'ftp']

valid_fileinfo = ['.html', '.csv', '.docx']

#splitting the url into two parts

url_split = url.split('://')

isProtocolValid = False

isFileValid = False

#iterating over the valid protocols and file names for validity

for x in valid_protocols:

if x in url_split[0]:

isProtocolValid = True

break

for x in valid_fileinfo:

if x in url_split[1]:

isFileValid = True

break

#Returning the result if the URL has both valid protocol and file extension

return (isProtocolValid and isFileValid)

url = input("Enter an URL: ")

print(validate_url(url))

Explanation:

The image of the output code is attached. Hope it helps.

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Thanks in advance!
:L

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A
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B
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C
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E
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