added upload image

cao_blogr/views/default.py

@@ -13,6 +13,9 @@ from ..forms import UserCreateForm, TopicForm, TagForm
 from ..models.user import User
 from ..models.blog_record import Topics, Tags
 import os
+from PIL import Image
+import shutil
+import magic
 
 
 @view_config(route_name='home',
@@ -296,6 +299,7 @@ def tag_edit(request):
              renderer='cao_blogr:templates/images.jinja2')
 def images(request):
 
+    message = ''
     folder_path = request.registry.settings['images_dir']
 
     images_list = []
@@ -305,8 +309,46 @@ def images(request):
         image.append(f.name)
         images_list.append(image)
 
+    if 'form.submitted' in request.params:
+        if request.POST['uploadfile'] != b'':
+            # récupère le fichier download dans le dossier /tmp
+            input_file = request.POST['uploadfile'].file
+            input_name = request.POST['uploadfile'].filename
+            ext_allowed = ['image/jpeg', 'image/jpg', 'image/png']
+
+            mime = magic.from_buffer(input_file.read(), mime=True) 
+            # types de fichiers autorisés ?
+            if mime not in ext_allowed:
+                request.session.flash("ERREUR: Le format du fichier n'est pas valide. Téléchargement impossible.", 'danger')
+                return HTTPFound(location=request.route_url('images'))
+
+            # Finally write the data to a temporary file
+            temp_file_path = os.path.join(folder_path, input_name)
+            # supprimer le fichier s'il existe déjà
+            if os.path.exists(temp_file_path):
+                os.remove(temp_file_path)
+
+            # copie le fichier upload dans temp_file
+            input_file.seek(0)
+            with open(temp_file_path, 'wb') as output_file:
+                shutil.copyfileobj(input_file, output_file)
+
+            # controler la taille du fichier < 4 Mo
+            filesize = round(os.path.getsize(temp_file_path) / 1024)
+            if filesize > 4096:
+                os.remove(temp_file_path)
+                request.session.flash("ERREUR: La taille du fichier dépasse la limite autorisée. Téléchargement impossible.", 'danger')
+                return HTTPFound(location=request.route_url('images'))
+
+            # using the Python Image Library (PIL) to resize an image
+            resize_photos(temp_file_path)
+
+            request.session.flash('%s : Ce fichier est téléchargé avec succès.' % input_name, 'success')
+            return HTTPFound(location=request.route_url('images'))
+
     return {
         'page_title': "Images",
+        'message': message,
         'images_list': images_list,
         }
 
@@ -339,3 +381,27 @@ def image_edit(request):
         'file_url': request.static_url('cao_blogr:static/img/') + filename,
         }
 
+def resize_photos(image_file):
+    # using the Python Image Library (PIL) to resize an image
+    img_org = Image.open(image_file)
+    # get the size of the original image
+    width_org, height_org = img_org.size
+    original_size = max(width_org, height_org)
+
+    MAX_SIZE = 800
+    # width or height > than MAX_SIZE ?
+    if original_size >= MAX_SIZE:
+        if (width_org > height_org):
+            resized_width = MAX_SIZE
+            resized_height = int(round((MAX_SIZE/float(width_org))*height_org)) 
+        else:
+            resized_height = MAX_SIZE
+            resized_width = int(round((MAX_SIZE/float(height_org))*width_org))
+
+    # best down-sizing filter
+    img_anti = img_org.resize((resized_width, resized_height), Image.ANTIALIAS)
+    # create a new file name for saving the result
+    img_anti.save(image_file)
+
+    return
+