Increase preview task timeout to 60 seconds to cover for even the wost load scenario. Consolidate literal to store the timeout value.

mayan/apps/documents/api_views.py

@@ -18,6 +18,7 @@ from permissions.models import Permission
 from rest_api.filters import MayanObjectPermissionsFilter
 from rest_api.permissions import MayanPermission
 
+from .literals import DOCUMENT_IMAGE_TASK_TIMEOUT
 from .models import (Document, DocumentPage, DocumentType, DocumentVersion,
                      RecentDocument)
 from .permissions import (PERMISSION_DOCUMENT_CREATE,
@@ -37,9 +38,6 @@ from .settings import DISPLAY_SIZE, ZOOM_MAX_LEVEL, ZOOM_MIN_LEVEL
 from .tasks import task_get_document_image, task_new_document
 
 
-DOCUMENT_IMAGE_TASK_TIMEOUT = 10
-
-
 class APIDocumentListView(generics.ListAPIView):
     """
     Returns a list of all the documents.

mayan/apps/documents/literals.py

@@ -8,3 +8,5 @@ PICTURE_UNKNOWN_MEDIUM = u'1299549805_unknown.png'
 DEFAULT_ZIP_FILENAME = u'document_bundle.zip'
 
 LANGUAGE_CHOICES = [(i.bibliographic, i.name) for i in list(pycountry.languages)]
+
+DOCUMENT_IMAGE_TASK_TIMEOUT = 20

mayan/apps/documents/views.py

@@ -34,6 +34,7 @@ from .forms import (DocumentContentForm, DocumentDownloadForm, DocumentForm,
                     DocumentTypeForm, DocumentTypeFilenameForm,
                     DocumentTypeFilenameForm_create, DocumentTypeSelectForm,
                     PrintForm)
+from .literals import DOCUMENT_IMAGE_TASK_TIMEOUT
 from .models import (Document, DocumentType, DocumentPage,
                      DocumentPageTransformation, DocumentTypeFilename,
                      DocumentVersion, RecentDocument)
@@ -333,7 +334,7 @@ def get_document_image(request, document_id, size=PREVIEW_SIZE):
     rotation = int(request.GET.get('rotation', DEFAULT_ROTATION)) % 360
 
     task = task_get_document_image.apply_async(kwargs=dict(document_id=document.pk, size=size, page=page, zoom=zoom, rotation=rotation, as_base64=False, version=version), queue='converter')
-    return sendfile.sendfile(request, task.get(timeout=10), mimetype=DEFAULT_FILE_FORMAT_MIMETYPE)
+    return sendfile.sendfile(request, task.get(timeout=DOCUMENT_IMAGE_TASK_TIMEOUT), mimetype=DEFAULT_FILE_FORMAT_MIMETYPE)
 
 
 def document_download(request, document_id=None, document_id_list=None, document_version_pk=None):