json: export content of uploads (#7254)

wcs/backoffice/management.py

@@ -858,7 +858,7 @@ class FormPage(Directory):
             selected_filter, user=user, query=query, criterias=criterias,
             order_by=order_by)
         if get_request().form.get('full') == 'on':
-            output = [json.loads(filled.export_to_json()) for filled in items]
+            output = [json.loads(filled.export_to_json(include_files=False)) for filled in items]
         else:
             output = [{'id': filled.id,
                 'url': filled.get_url(),

wcs/fields.py

@@ -17,6 +17,7 @@
 import time
 import random
 import re
+import base64
 import xml.etree.ElementTree as ET
 
 from quixote import get_request, get_publisher
@@ -708,7 +709,12 @@ class FileField(WidgetField):
         return ['%s' % value]
 
     def get_json_value(self, value):
-        return {'field_id': self.id, 'filename': value.base_filename}
+        return {
+            'field_id': self.id,
+            'filename': value.base_filename,
+            'content_type': value.content_type or 'application/octet-stream',
+            'content': base64.b64encode(value.get_file_pointer().read())
+        }
 
     def perform_more_widget_changes(self, form, kwargs, edit = True):
         if not edit:

wcs/formdata.py

@@ -28,6 +28,7 @@ import qommon.misc
 from qommon.substitution import Substitutions
 
 from roles import Role
+from fields import FileField
 
 
 def get_dict_with_varnames(fields, data, formdata=None, varnames_only=False):
@@ -87,11 +88,13 @@ def flatten_dict(d):
             del d[k]
 
 
-def get_json_dict(fields, data):
+def get_json_dict(fields, data, include_files=True):
     new_data = {}
     for field in fields:
         if not field.varname: # exports only named fields
             continue
+        if not include_files and isinstance(field, FileField):
+            continue
         if data is not None:
             value = data.get(field.id)
             if value and hasattr(field, 'get_json_value'):
@@ -527,7 +530,7 @@ class FormData(StorableObject):
                 evo.parts = None
         self.store()
 
-    def export_to_json(self):
+    def export_to_json(self, include_files=True):
         data = {}
         data['id'] = '%s/%s' % (self.formdef.url_name, self.id)
         data['display_id'] = self.get_display_id()
@@ -553,7 +556,8 @@ class FormData(StorableObject):
         if user:
             data['user'] = {'id': user.id, 'name': user.display_name}
 
-        data['fields'] = get_json_dict(self.formdef.fields, self.data)
+        data['fields'] = get_json_dict(self.formdef.fields, self.data,
+                include_files=include_files)
 
         data['workflow'] = {}
         wf_status = self.get_visible_status()