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kennels-server/request_handler.py
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2022-01-10 11:09:49 -06:00

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Python

from http.server import BaseHTTPRequestHandler, HTTPServer
from views import get_all_animals
from http.server import BaseHTTPRequestHandler, HTTPServer
# Here's a class. It inherits from another class.
# For now, think of a class as a container for functions that
# work together for a common purpose. In this case, that
# common purpose is to respond to HTTP requests from a client.
class HandleRequests(BaseHTTPRequestHandler):
# This is a Docstring it should be at the beginning of all classes and functions
# It gives a description of the class or function
"""Controls the functionality of any GET, PUT, POST, DELETE requests to the server
"""
# Here's a class function
def _set_headers(self, status):
# Notice this Docstring also includes information about the arguments passed to the function
"""Sets the status code, Content-Type and Access-Control-Allow-Origin
headers on the response
Args:
status (number): the status code to return to the front end
"""
self.send_response(status)
self.send_header('Content-type', 'application/json')
self.send_header('Access-Control-Allow-Origin', '*')
self.end_headers()
# Another method! This supports requests with the OPTIONS verb.
def do_OPTIONS(self):
"""Sets the options headers
"""
self.send_response(200)
self.send_header('Access-Control-Allow-Origin', '*')
self.send_header('Access-Control-Allow-Methods',
'GET, POST, PUT, DELETE')
self.send_header('Access-Control-Allow-Headers',
'X-Requested-With, Content-Type, Accept')
self.end_headers()
# Here's a method on the class that overrides the parent's method.
# It handles any GET request.
def do_GET(self):
"""Handles GET requests to the server
"""
# Set the response code to 'Ok'
self._set_headers(200)
# Your new console.log() that outputs to the terminal
print(self.path)
if self.path == "/animals":
response = get_all_animals()
# It's an if..else statement
else:
response = []
# This weird code sends a response back to the client
self.wfile.write(f"{response}".encode())
# Here's a method on the class that overrides the parent's method.
# It handles any POST request.
def do_POST(self):
"""Handles POST requests to the server
"""
# Set response code to 'Created'
self._set_headers(201)
content_len = int(self.headers.get('content-length', 0))
post_body = self.rfile.read(content_len)
response = f"received post request:<br>{post_body}"
self.wfile.write(response.encode())
# Here's a method on the class that overrides the parent's method.
# It handles any PUT request.
def do_PUT(self):
"""Handles PUT requests to the server
"""
self.do_POST()
# This function is not inside the class. It is the starting
# point of this application.
def main():
"""Starts the server on port 8088 using the HandleRequests class
"""
host = ''
port = 8088
HTTPServer((host, port), HandleRequests).serve_forever()
if __name__ == "__main__":
main()