Code-Memo

Handling Requests and Responses

The HttpRequest object encapsulates all HTTP request information. It provides attributes like method, GET, POST, COOKIES, FILES, and META data.

from django.http import HttpResponse

def my_view(request):
    if request.method == 'POST':
        # Process POST data
        return HttpResponse('POST request processed.')
    else:
        # Process GET data
        return HttpResponse('GET request processed.')

• request.method checks the HTTP method (GET or POST).
• request.POST accesses POST data.

Django HttpResponse Object

The HttpResponse object represents the HTTP response. It contains the content and optional headers to send back to the client.

from django.http import HttpResponse

def hello_world(request):
    return HttpResponse('Hello, world!')

• HttpResponse('Hello, world!') sends a simple HTTP response with content.

JsonResponse for JSON Responses

The JsonResponse class in Django simplifies returning JSON-encoded data as a response.

from django.http import JsonResponse

def api_data(request):
    data = {'key': 'value'}
    return JsonResponse(data)

• JsonResponse(data) sends a JSON response with the specified data.

Redirects

Django provides utilities to perform HTTP redirects.

from django.shortcuts import redirect

def my_view(request):
    if some_condition:
        return redirect('another_view_name')
    else:
        return redirect('/some_url/')

• redirect('view_name') redirects to a named view.
• redirect('/some_url/') redirects to a specified URL.

Handling File Uploads

Django facilitates handling file uploads with request.FILES.

def handle_uploaded_file(request):
    if request.method == 'POST' and request.FILES:
        uploaded_file = request.FILES['file']
        # Process the uploaded file
        return HttpResponse('File uploaded successfully.')
    return HttpResponse('File upload failed.')

• request.FILES['file'] accesses the uploaded file.