/
views.py
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/
views.py
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from django.conf import settings
from django.http import HttpResponse, JsonResponse
from django.shortcuts import render, get_object_or_404
from django.contrib.auth.decorators import login_required
from django.contrib.auth import logout as django_logout
import requests
from requests.auth import HTTPBasicAuth
import numpy
from PIL import Image
def login(request):
context = {}
return render(request, 'login.html', context)
def logout(request):
django_logout(request)
context = {}
return render(request, 'logout.html', context)
@login_required
def index(request):
context = {}
return render(request, 'index.html', context)
def upload(request, context, png_name, scroll_speed):
############################################################################
# convert PNG to rgb565 BMP
############################################################################
image = Image.open('pico_sign_web/static/' + png_name).transpose(Image.ROTATE_270)
width, height = image.size
if image.mode == 'P':
palette = np.array(image.getpalette()).reshape(-1, 3)
getPixel = lambda x,y: palette[image.getpixel((x, y))]
else:
getPixel = lambda x,y: image.getpixel((x, y))
bin_name = png_name.rsplit('.', 1)[0] + '.bin'
bin_fp = open('pico_sign_web/static/' + bin_name, 'wb')
for y in range(height):
for x in range(width):
rgb888 = getPixel(x, y)
rgb565 = ((rgb888[0]>>3)<<11) | ((rgb888[1]>>2)<<5) | (rgb888[2]>>3)
bin_fp.write(rgb565.to_bytes(2, byteorder = "little"))
bin_fp.close()
############################################################################
# uploading image bin to mono-PF
# refers : https://manual.sakura.ad.jp/cloud/iotpf/api.html#iotpf-api-filetransfer
############################################################################
# create common service item id on sakura cloud
ret = requests.put( \
settings.SAKURACLOUD_COMMONSERVICEITEM_ENDPOINT + '/' + settings.SIPF_PROJECT_ID + '/iotplatform/vmgw/files/' + bin_name + '/stat', \
auth=HTTPBasicAuth(settings.SAKURACLOUD_ACCESS_TOKEN, settings.SAKURACLOUD_ACCESS_TOKEN_SECRET), \
)
if not (ret.status_code == 200 or ret.status_code == 201):
return render(request, 'error.html', context)
# file upload request
ret = requests.put( \
settings.SAKURACLOUD_COMMONSERVICEITEM_ENDPOINT + '/' + settings.SIPF_PROJECT_ID + '/iotplatform/vmgw/files/' + bin_name + '/upload_request', \
auth=HTTPBasicAuth(settings.SAKURACLOUD_ACCESS_TOKEN, settings.SAKURACLOUD_ACCESS_TOKEN_SECRET), \
)
if ret.status_code != 200:
return render(request, 'error.html', context)
ret_json = ret.json()
upload_url = ret_json['IoTPlatform']['url']
upload_token = ret_json['IoTPlatform']['token']
# file upload
bin_fp = open('pico_sign_web/static/' + bin_name, 'rb')
headers_dict = {
'Authorization' : 'Bearer ' + upload_token,
}
ret = requests.put( \
upload_url, \
headers=headers_dict, \
files={'attachment': bin_fp}, \
)
bin_fp.close()
if ret.status_code != 202:
return render(request, 'error.html', context)
############################################################################
# submit bin_name message to mono-PF
# refers : https://manual.sakura.ad.jp/cloud/iotpf/service-adapter/service-adapter-incoming-webhook.html
############################################################################
headers_dict = {'Content-Type' : 'application/json'}
json_dict = {
'device_id' : settings.SIPF_DEVICE_ID,
'type' : 'object',
'payload' : [
{
'type' : 'string.utf8',
'tag' : 'FF',
'value' : bin_name,
}
],
}
result = requests.post(settings.SIPF_WEBHOOK_ENDPOINT, headers=headers_dict, json=json_dict)
############################################################################
# submit scroll_speed message to mono-PF
############################################################################
headers_dict = {'Content-Type' : 'application/json'}
json_dict = {
'device_id' : settings.SIPF_DEVICE_ID,
'type' : 'object',
'payload' : [
{
'type' : 'int16',
'tag' : 'FF',
'value' : scroll_speed,
}
],
}
result = requests.post(settings.SIPF_WEBHOOK_ENDPOINT, headers=headers_dict, json=json_dict)
# inject result page parameters
context["bin_name"] = bin_name
context["scroll_speed"] = scroll_speed
return render(request, 'done.html', context)
@login_required
def preset(request):
context = {}
# POST only
if request.method != 'POST':
return render(request, 'error.html', context)
# check if valid POST parameter exists
param_str = request.POST.get('param_str', None)
if param_str == None:
return render(request, 'error.html', context)
# parse "{filename}:{scroll}" string into parameters
params = param_str.split(':')
if len(params) != 2:
return render(request, 'error.html', context)
if not params[1].isdigit():
return render(request, 'error.html', context)
png_name = params[0]
scroll_speed = int(params[1])
if scroll_speed > 32767:
scroll_speed = 32767
if scroll_speed < -32768:
scroll_speed = -32768
return upload(request, context, png_name, scroll_speed)
@login_required
def custom(request):
context = {}
# POST only
if request.method != 'POST':
return render(request, 'error.html', context)
# check if valid POST multipart upload + scroll_speed number exists
png_body = request.FILES.get('png_body')
if png_body == None:
return render(request, 'error.html', context)
scroll_speed_str = request.POST.get('scroll_speed')
if scroll_speed_str == None:
return render(request, 'error.html', context)
if not scroll_speed_str.isdigit():
return render(request, 'error.html', context)
# store multipart upload
png_name = 'custom.png'
png_fp = open('pico_sign_web/static/' + png_name, 'wb')
for chunk in png_body.chunks():
png_fp.write(chunk)
png_fp.close()
# store scroll_speed number
scroll_speed = int(scroll_speed_str)
if scroll_speed > 32767:
scroll_speed = 32767
if scroll_speed < -32768:
scroll_speed = -32768
return upload(request, context, png_name, scroll_speed)