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Django

Video Upload

The following sections describe how to handle video uploads on your server using Django as a server-side language. For information on the upload workflow refer to the video upload documentation.

Requirements

For this example to work you need an upload folder

To create the upload folder copy and paste this code snippet to settings.py

# Create public directory at startup.
publicDirectory = os.path.join(BASE_DIR, "public")
if not os.path.exists(publicDirectory):
os.makedirs(publicDirectory)

Frontend

Setting up the index page.

  1. On the head section include the Editor style.

  2. <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    
    <link href="https://cdn.jsdelivr.net/npm/froala-editor@latest/css/froala_editor.pkgd.min.css" rel="stylesheet" type="text/css" />
    </head>
  3. On the body section include the Editor JS files and define the area for the editor.

  4. <body>  
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/froala-editor@latest/js/froala_editor.pkgd.min.js"></script>
    
    <div class="sample">
    <h2>Video upload example.</h2>
    <form>
    <textarea id="edit" name="content"></textarea>
    </form>
    </div>
    
  5. Initialize the editor and set the video upload URL

  6. <script>
    new FroalaEditor('#edit', {
    // Set the video upload URL.
    videoUploadURL: '/UploadFiles',
    
    videoUploadParams: {
    id: 'my_editor'
    }
    })
    </script>
    </body>
    </html>

The full code should look like this:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link href="https://cdn.jsdelivr.net/npm/froala-editor@latest/css/froala_editor.pkgd.min.css" rel="stylesheet" type="text/css" />
</head>

<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/froala-editor@latest/js/froala_editor.pkgd.min.js"></script>

<div class="sample">
<h2>Video upload example.</h2>
<form>
<textarea id="edit" name="content"></textarea>
</form>
</div>


<script>
new FroalaEditor('#edit', {

videoUploadURL: '/UploadFiles',

videoUploadParams: {
id: 'my_editor'
}
})
</script>
</body>
</html>

Backend

views.py handles the server part for django

Inside views.py, the Video class handles the video upload

from django.http import HttpResponse
from django.conf import settings
from django.shortcuts import render_to_response
from os.path import isfile, join
from mimetypes import MimeTypes
from os import listdir
from wand.image import Image
import wand.image
import hashlib
import json
import time
import hmac
import copy
import sys
import os

def index(request):
return render_to_response(os.path.join(settings.STATIC_DIR, "index.html"))


def upload_video(request):
try:
response = Video.upload(DjangoAdapter(request), "/public/")
except Exception:
response = {"error": str(sys.exc_info()[1])}
return HttpResponse(json.dumps(response), content_type="application/json")


def upload_video_validation(request):

def validation(filePath, mimetype):
size = os.path.getsize(filePath)
if size > 50 * 1024 * 1024:
  return False
return True

options = {
"fieldname": "myFile",
"validation": validation
}

try:
response = Video.upload(DjangoAdapter(request), "/public/", options)
except Exception:
response = {"error": str(sys.exc_info()[1])}
return HttpResponse(json.dumps(response), content_type="application/json")


class Video(object):

defaultUploadOptions = {
"fieldname": "file",
"validation": {
  "allowedExts": ["mp4", "webm", "ogg"],
  "allowedMimeTypes": ["video/mp4", "video/webm", "video/ogg"]
}
}

    @staticmethod
def upload(req, fileRoute, options=None):
"""
Video upload to disk.
Parameters:
  req: framework adapter to http request. See BaseAdapter.
  fileRoute: string
  options: dict optional, see defaultUploadOptions attribute
Return:
  dict: {link: "linkPath"}
"""

if options is None:
  options = Video.defaultUploadOptions
else:
  options = Utils.merge_dicts(Video.defaultUploadOptions, options)

return File.upload(req, fileRoute, options)

    @staticmethod
def delete(src):
return File.delete(src)

    @staticmethod
def list(folderPath, thumbPath=None):

if thumbPath == None:
  thumbPath = folderPath

# Array of video objects to return.
response = []

absoluteFolderPath = Utils.getServerPath() + folderPath

# Video types.
videoTypes = Video.defaultUploadOptions["validation"]["allowedMimeTypes"]

# Filenames in the uploads folder.
fnames = [f for f in listdir(absoluteFolderPath) if isfile(join(absoluteFolderPath, f))]

for fname in fnames:
  mime = MimeTypes()
  mimeType = mime.guess_type(absoluteFolderPath + fname)[0]

  if mimeType in videoTypes:
      response.append({
          "url": folderPath + fname,
          "thumb": thumbPath + fname,
          "name": fname
      })

return response


class Utils(object):
"""
Utils static class.
"""

    @staticmethod
def hmac(key, string, hex=False):
"""
Calculate hmac.
Parameters:
  key: string
  string: string
  hex: boolean optional, return in hex, else return in binary
Return:
  string: hmax in hex or binary
"""

# python 2-3 compatible:
try:
  hmac256 = hmac.new(key.encode() if isinstance(key, str) else key, msg=string.encode("utf-8") if isinstance(string, str) else string, digestmod=hashlib.sha256) # v3
except Exception:
  hmac256 = hmac.new(key, msg=string, digestmod=hashlib.sha256) # v2

return hmac256.hexdigest() if hex else hmac256.digest()

    @staticmethod
def merge_dicts(a, b, path=None):
"""
Deep merge two dicts without modifying them. Source: http://stackoverflow.com/questions/7204805/dictionaries-of-dictionaries-merge/7205107#7205107
Parameters:
  a: dict
  b: dict
  path: list
Return:
  dict: Deep merged dict.
"""

aClone = copy.deepcopy(a);
# Returns deep b into a without affecting the sources.
if path is None: path = []
for key in b:
  if key in a:
      if isinstance(a[key], dict) and isinstance(b[key], dict):
          aClone[key] = Utils.merge_dicts(a[key], b[key], path + [str(key)])
      else:
          aClone[key] = b[key]
  else:
      aClone[key] = b[key]
return aClone

    @staticmethod
def getExtension(filename):
"""
Get filename extension.
Parameters:
  filename: string
Return:
  string: The extension without the dot.
"""
return os.path.splitext(filename)[1][1:]

    @staticmethod
def getServerPath():
"""
Get the path where the server has started.
Return:
  string: serverPath
"""
return os.path.abspath(os.path.dirname(sys.argv[0]))

    @staticmethod
def isFileValid(filename, mimetype, allowedExts, allowedMimeTypes):
"""
Test if a file is valid based on its extension and mime type.
Parameters:
  filename string
  mimeType string
  allowedExts list
  allowedMimeTypes list
Return:
  boolean
"""

# Skip if the allowed extensions or mime types are missing.
if not allowedExts or not allowedMimeTypes:
  return False

extension = Utils.getExtension(filename)
return extension.lower() in allowedExts and mimetype in allowedMimeTypes

    @staticmethod
def isValid(validation, filePath, mimetype):
"""
Generic file validation.
Parameters:
  validation: dict or function
  filePath: string
  mimetype: string
"""

# No validation means you dont want to validate, so return affirmative.
if not validation:
  return True

# Validation is a function provided by the user.
if callable(validation):
  return validation(filePath, mimetype)

if isinstance(validation, dict):
  return Utils.isFileValid(filePath, mimetype, validation["allowedExts"], validation["allowedMimeTypes"])

# Else: no specific validating behaviour found.
return False


class BaseAdapter(object):
"""
Interface. Inherit this class to use the lib in your framework.
"""

def __init__(self, request):
"""
Constructor.
Parameters:
  request: http request object from some framework.
"""
self.request = request

def riseError(self):
"""
Use this when you want to make an abstract method.
"""
raise NotImplementedError( "Should have implemented this method." )

def getFilename(self, fieldname):
"""
Get upload filename based on the fieldname.
Parameters:
  fieldname: string
Return:
  string: filename
"""
self.riseError()

def getMimetype(self, fieldname):
"""
Get upload file mime type based on the fieldname.
Parameters:
  fieldname: string
Return:
  string: mimetype
"""
self.riseError()

def saveFile(self, fieldname, fullNamePath):
"""
Save the upload file based on the fieldname on the fullNamePath location.
Parameters:
  fieldname: string
  fullNamePath: string
"""
self.riseError()


class DjangoAdapter(BaseAdapter):
"""
Django Adapter: Check BaseAdapter to see what methods description.
"""

def checkFile(self, fieldname):
if fieldname not in self.request.FILES:
  raise Exception("File does not exist.")

def getFilename(self, fieldname):
self.checkFile(fieldname)
return self.request.FILES[fieldname].name

def getMimetype(self, fieldname):
self.checkFile(fieldname)
return self.request.FILES[fieldname].content_type

def saveFile(self, fieldname, fullNamePath):
print("should save now")
print("the path" + fullNamePath)
self.checkFile(fieldname)

with open(fullNamePath, "wb+") as destination:
  for chunk in self.request.FILES[fieldname].chunks():
      destination.write(chunk)

In urls.py define the request path with the according method, in this case the video upload.

from django.conf.urls import url
import views
from django.conf.urls.static import static
from django.conf import settings

urlpatterns = [
url(r"^$", views.index, name="index"),
url(r"^upload_video$", views.upload_video, name="upload_video"),
url(r"^upload_video_validation", views.upload_video_validation, name="upload_video_validation")
] + static(settings.STATIC_URL, document_root=settings.STATIC_DIR) + static(settings.STATIC_PUBLIC_URL, document_root=settings.STATIC_PUBLIC_DIR)

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