refactor with blueprints

app/photo_routes/photo_upload.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+
+from flask import current_app
+from flask_login import current_user
+from flask import Blueprint, render_template, redirect, url_for, flash, request, abort
+from app.forms import UploadPhotoForm
+from .scripts.process_uploaded_photo import process_uploaded_photo
+from werkzeug.utils import secure_filename
+
+pupload = Blueprint(
+    "pupload", __name__, template_folder="templates"
+)
+
+
+@pupload.route('/photo-upload', methods=['GET', 'POST'])
+def photo_upload():
+    if not current_user.is_authenticated:
+        return(redirect(url_for('proute.index')))
+    form = UploadPhotoForm()
+    if request.method == 'POST' and form.validate_on_submit():
+        f = request.files['image']
+        filename = secure_filename(f.filename)
+        if filename != '':
+            import os
+            file_ext = os.path.splitext(filename)[1]
+            if file_ext not in ['.jpg', '.png'] or file_ext != validate_image(f.stream):
+                abort(400)
+            f.save(os.path.join(current_app.config['PHOTO_SAVE_PATH'], 'raw_' + filename))
+            photo_id = process_uploaded_photo(filename, current_user, current_app.config)
+            print(photo_id)
+            flash("Thanks for the new photo!")
+            return(redirect(url_for('p_route.photo', photo_id=photo_id)))
+        return(redirect(url_for('proute.index')))
+    return render_template('upload.html', title="Photo Upload", form=form)
+
+
+def validate_image(stream):
+    import imghdr
+    header = stream.read(512)
+    stream.seek(0)
+    format = imghdr.what(None, header)
+    if not format:
+        return None
+    return '.' + (format if format != 'jpeg' else 'jpg')