kopia lustrzana https://github.com/OpenDroneMap/WebODM
103 wiersze
4.4 KiB
Python
103 wiersze
4.4 KiB
Python
import mimetypes
|
|
import os
|
|
|
|
from django.http import FileResponse
|
|
from django.http import HttpResponse
|
|
from wsgiref.util import FileWrapper
|
|
from rest_framework import status
|
|
from rest_framework.response import Response
|
|
from app.plugins.views import TaskView
|
|
from worker.tasks import execute_grass_script
|
|
from app.plugins.grass_engine import grass, GrassEngineException, cleanup_grass_context
|
|
from worker.celery import app as celery
|
|
|
|
class TaskContoursGenerate(TaskView):
|
|
def post(self, request, pk=None):
|
|
task = self.get_and_check_task(request, pk)
|
|
|
|
layer = request.data.get('layer', None)
|
|
if layer == 'DSM' and task.dsm_extent is None:
|
|
return Response({'error': 'No DSM layer is available.'})
|
|
elif layer == 'DTM' and task.dtm_extent is None:
|
|
return Response({'error': 'No DTM layer is available.'})
|
|
|
|
try:
|
|
if layer == 'DSM':
|
|
dem = os.path.abspath(task.get_asset_download_path("dsm.tif"))
|
|
elif layer == 'DTM':
|
|
dem = os.path.abspath(task.get_asset_download_path("dtm.tif"))
|
|
else:
|
|
raise GrassEngineException('{} is not a valid layer.'.format(layer))
|
|
|
|
context = grass.create_context({'auto_cleanup' : False})
|
|
epsg = int(request.data.get('epsg', '3857'))
|
|
interval = float(request.data.get('interval', 1))
|
|
format = request.data.get('format', 'GPKG')
|
|
supported_formats = ['GPKG', 'ESRI Shapefile', 'DXF', 'GeoJSON']
|
|
if not format in supported_formats:
|
|
raise GrassEngineException("Invalid format {} (must be one of: {})".format(format, ",".join(supported_formats)))
|
|
simplify = float(request.data.get('simplify', 0.01))
|
|
|
|
context.add_param('dem_file', dem)
|
|
context.add_param('interval', interval)
|
|
context.add_param('format', format)
|
|
context.add_param('simplify', simplify)
|
|
context.add_param('epsg', epsg)
|
|
context.set_location('epsg:' + str(epsg))
|
|
|
|
celery_task_id = execute_grass_script.delay(os.path.join(
|
|
os.path.dirname(os.path.abspath(__file__)),
|
|
"calc_contours.grass"
|
|
), context.serialize()).task_id
|
|
|
|
return Response({'celery_task_id': celery_task_id}, status=status.HTTP_200_OK)
|
|
except GrassEngineException as e:
|
|
return Response({'error': str(e)}, status=status.HTTP_200_OK)
|
|
|
|
class TaskContoursCheck(TaskView):
|
|
def get(self, request, pk=None, celery_task_id=None):
|
|
res = celery.AsyncResult(celery_task_id)
|
|
if not res.ready():
|
|
return Response({'ready': False}, status=status.HTTP_200_OK)
|
|
else:
|
|
result = res.get()
|
|
if result.get('error', None) is not None:
|
|
cleanup_grass_context(result['context'])
|
|
return Response({'ready': True, 'error': result['error']})
|
|
|
|
contours_file = result.get('output')
|
|
if not contours_file:
|
|
cleanup_grass_context(result['context'])
|
|
return Response({'ready': True, 'error': 'No contours file was generated. This could be a bug.'})
|
|
|
|
request.session['contours_' + celery_task_id] = contours_file
|
|
return Response({'ready': True})
|
|
|
|
|
|
class TaskContoursDownload(TaskView):
|
|
def get(self, request, pk=None, celery_task_id=None):
|
|
contours_file = request.session.get('contours_' + celery_task_id, None)
|
|
|
|
if contours_file is not None:
|
|
filename = os.path.basename(contours_file)
|
|
filesize = os.stat(contours_file).st_size
|
|
|
|
f = open(contours_file, "rb")
|
|
|
|
# More than 100mb, normal http response, otherwise stream
|
|
# Django docs say to avoid streaming when possible
|
|
stream = filesize > 1e8
|
|
if stream:
|
|
response = FileResponse(f)
|
|
else:
|
|
response = HttpResponse(FileWrapper(f),
|
|
content_type=(mimetypes.guess_type(filename)[0] or "application/zip"))
|
|
|
|
response['Content-Type'] = mimetypes.guess_type(filename)[0] or "application/zip"
|
|
response['Content-Disposition'] = "inline; filename={}".format(filename)
|
|
response['Content-Length'] = filesize
|
|
|
|
return response
|
|
else:
|
|
return Response({'error': 'Invalid contours download id'})
|