The payload transmitted from JavaScript to Django Views is devoid of any content

Question

The payload transmitted from JavaScript to Django Views is devoid of any content

I'm currently working on sending data from JavaScript to Django using ajax. Below is the code snippet I am using for this:

            var json_name = {'name': 123}
            $.ajax({
            method: 'POST',
            url: 'my url',
            contentType: "application/json",
            headers: {
                    'Content-Type':'application/json',
                    'X-CSRFToken': "{{ csrf_token }}"
                },

            data: JSON.stringify(json_name),
            success: function (data) {
         //this gets called when server returns an OK response
            alert("it worked!");
            },
        error: function (data) {
             alert("it didnt work");
            }
        });

Below is the corresponding code in my Views.py file:

def myview(request):
    if request.is_ajax():
       request_data = request.body
       # data = json.loads(request.body)
       print(request_data)
       # print(data)
       return render(request, 'candidate/view.html')
    else:
       return render(request, 'candidate/view.html')

The output I receive is b''

When I attempt to include these lines:

data = json.loads(request.body)
print(data)

I encounter the following error:

TypeError: the JSON object must be str, not 'bytes'

I have referred to a similar issue on Stack Overflow here

If anyone could assist me with resolving this issue, please let me know if you require any additional information.

javascript json ajax django

Answer 1

Answer №1

Dealing with significant hair loss on my head led me to the following solution:

In my views.py:

from django.views.decorators.csrf import csrf_exempt

@csrf_exempt
def myview(request):
if request.is_ajax():
    if request.method == 'POST':
        data = request.POST.get('senddata')
        print(data)
    return render(request, 'candidate/view.html')
else:
    return render(request, 'candidate/view.html')

Here is a snippet of my JavaScript code:

            <script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script>

            $.ajax({
            type: 'POST',
            url: 'my_url',
            // contentType: "application/json",
            // headers: {
      //               'Content-Type':'application/json',
      //               'X-CSRFToken': "{{ csrf_token }}"
      //           },
            dataType: "json",
            data: {
                senddata: JSON.stringify(json_name),
                },

            // data: json_name,

            success: function (data) {
         //this gets called when server returns an OK response
            alert("it worked!");
            },
        error: function (data) {
             alert("it didn't work");
            }
        });

Although the terminal displays that the data was successfully passed, I encounter the message it didn't work upon running it.

I attempted to incorporate the csrf token in the ajax request without success, leading me to utilize csrf_exempt in my views as a temporary workaround.

This method may not be ideal but serves its purpose for now. If you have a cleaner or more effective solution, please share it here!

Answer 2

Dealing with significant hair loss on my head led me to the following solution:

In my views.py:

from django.views.decorators.csrf import csrf_exempt

@csrf_exempt
def myview(request):
if request.is_ajax():
    if request.method == 'POST':
        data = request.POST.get('senddata')
        print(data)
    return render(request, 'candidate/view.html')
else:
    return render(request, 'candidate/view.html')

Here is a snippet of my JavaScript code:

            <script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script>

            $.ajax({
            type: 'POST',
            url: 'my_url',
            // contentType: "application/json",
            // headers: {
      //               'Content-Type':'application/json',
      //               'X-CSRFToken': "{{ csrf_token }}"
      //           },
            dataType: "json",
            data: {
                senddata: JSON.stringify(json_name),
                },

            // data: json_name,

            success: function (data) {
         //this gets called when server returns an OK response
            alert("it worked!");
            },
        error: function (data) {
             alert("it didn't work");
            }
        });

Although the terminal displays that the data was successfully passed, I encounter the message it didn't work upon running it.

I attempted to incorporate the csrf token in the ajax request without success, leading me to utilize csrf_exempt in my views as a temporary workaround.

This method may not be ideal but serves its purpose for now. If you have a cleaner or more effective solution, please share it here!

Answer 3

Answer №2

In my Django 1.11 testcase, I have tested with both Python 3.6 and Python 2.7.

The template file used for testing includes:

<button>Send data</button>
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script>
$('button').on('click', function(event) {
    var data = { name: 123 };
    $.ajax({
        method: 'POST',
        url: '',
        contentType: 'application/json',
        headers: {
            'X-CSRFToken': '{{ csrf_token }}',
        },
        data: JSON.stringify(data),
        success: function() {
            console.log('Success!');
        },
        error: function() {
            console.log('Error...');
        },
    });
});
</script>

Furthermore, the route provided delivers the template file and displays any AJAX data:

from django.http import response
from django.shortcuts import render
import json

def index(request):
    if request.is_ajax():
        request_body = request.body
        data = json.loads(request_body)
        print(data)
    return render(request, 'stackoverflowhelp/index.html')

Despite attempts to reproduce the issue, I have not encountered it so far.

Upon further investigation, I discovered that in Python 3.6, the json.loads method can support bytes objects, whereas in Python 2.7, it only supports string types according to the Python 2.7 documentation on json.loads. Although your reported error aligns with this, my efforts to replicate it have been unsuccessful.

Considering the error information provided, one potential solution could involve calling decode on request.body:

def index(request):
    if request.is_ajax():
        request_body = request.body.decode("utf-8")
        data = json.loads(request_body)
        print(data)
    return render(request, 'stackoverflowhelp/index.html')

Answer 4

In my Django 1.11 testcase, I have tested with both Python 3.6 and Python 2.7.

The template file used for testing includes:

<button>Send data</button>
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script>
$('button').on('click', function(event) {
    var data = { name: 123 };
    $.ajax({
        method: 'POST',
        url: '',
        contentType: 'application/json',
        headers: {
            'X-CSRFToken': '{{ csrf_token }}',
        },
        data: JSON.stringify(data),
        success: function() {
            console.log('Success!');
        },
        error: function() {
            console.log('Error...');
        },
    });
});
</script>

Furthermore, the route provided delivers the template file and displays any AJAX data:

from django.http import response
from django.shortcuts import render
import json

def index(request):
    if request.is_ajax():
        request_body = request.body
        data = json.loads(request_body)
        print(data)
    return render(request, 'stackoverflowhelp/index.html')

Despite attempts to reproduce the issue, I have not encountered it so far.

Upon further investigation, I discovered that in Python 3.6, the json.loads method can support bytes objects, whereas in Python 2.7, it only supports string types according to the Python 2.7 documentation on json.loads. Although your reported error aligns with this, my efforts to replicate it have been unsuccessful.

Considering the error information provided, one potential solution could involve calling decode on request.body:

def index(request):
    if request.is_ajax():
        request_body = request.body.decode("utf-8")
        data = json.loads(request_body)
        print(data)
    return render(request, 'stackoverflowhelp/index.html')

The payload transmitted from JavaScript to Django Views is devoid of any content

Answer №1

Answer №2

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