CODEWITHSUNDEEP
pythonpostpython-requestspython-3.6
Seunghyun Baek
Seunghyun Baek

Reputation: 55

Why requests is no sending data?

I made simply server.

This Server is return post raw data. So, When I use Restlet Client in Chrome Extension to Server, I can return my json post data.

But, Python Requests module is no return. I think requests did not send data.

Python 3.6.8 Requests 2.21.0 PHP 7

In PHP:

<?php
print_r($_POST);
?>

In Python:

    try:
        task = self.q.get_nowait()
        # json_data = json.dumps(task)
        if 'picture' in task['data']:
            filename = task['data']['picture']
        else:
            filename = ''

        try:
            task['uuid'] = self.uuid
            if filename == '':
                url = 'http://server_domin/upload_nopic.php'
                data = json.dumps(task)
                print('task: ' + data)
                r = requests.post(url, data=data)
                print("Response: %s" % r.json())
            else:
                url = 'http://server_domin/upload.php'
                files = {'file': open('./images/' + filename, 'rb')}
                print('task: ' + json.dumps(task))
                r = requests.post(url, files=files, data=json.dumps(task))
                print("Response: %s" % r.json())

            # print("Response: %s" % str(r.text()))

        except Exception as ex:
            print("Upload Failure. ", filename, ex)
            traceback.print_stack()
            traceback.print_exc()

    except queues.QueueEmpty:
        pass

I checked the data(variable) just before sending and the response after sending. data is saved normally, but response recieved empty data.

In Variable data:

{
  "data": {
    "utc": 1563862224,
    "accel": {
      "ax": -2.3630770385742186,
      "ay": 6.636727001953124,
      "az": 6.009446166992187
    },
    "gyro": {
      "gx": -4.137404580152672,
      "gy": -0.1297709923664122,
      "gz": 0.2366412213740458
    },
    "angle": {
      "ax": -14.785298705742603,
      "ay": 45.78478003457668,
      "az": 49.535035853061935
    },
    "temp": 26.459411764705884
  },
  "uuid": "ac2bbe96-5c2d-b960-6b88-40693bfb6a39"
}

In requests.text():

'' or Array()

Upvotes: 1

Views: 300

Answers (1)

Ivan Vinogradov
Ivan Vinogradov

Reputation: 4483

The remote server probably wants a JSON as an input.

And since you use 

data = json.dumps(task)
requests.post(url, data=data)

and

requests.post(url, files=files, data=json.dumps(task))

without setting Content-Type: application/json header, remote server may be unable to understand your HTTP request.

When you want to send a JSON, use json=data, not data=data. It will set appropriate Content-Type for you automatically.

Example:

data = {
    "uuid": "ac2bbe96-5c2d-b960-6b88-40693bfb6a39",
    "utc": 1563862224
    # ... other data
}
r = requests.post(url, json=data)
print(r.status_code, r.text)  # it is always a good idea to check response HTTP status code

Upvotes: 1

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