Fix printing via printservant

labelmaker/main.py

@@ -88,10 +88,13 @@ def stuff_print(size):
     renderer.render_text(text, 'Sans {}'.format(size), 0, -1, html)
 
     data = renderer.surface.write_to_png()
-    payload = {'printer': 'dymo_labelwriter450', 'copies': 1, 'body': data}
-    r = requests.post(os.environ.get('PRINTSERVANT_HOST') + '/print', params=payload)
-    print('Printing job response', r.text)
-
+    response = requests.post(
+        os.environ.get('PRINTSERVANT_HOST') + '/print',
+        params={'printer': 'dymo', 'copies': 1},
+        data=data,
+        headers={'Content-Type': 'image/png'},
+    )
+    print('Printing job response', response)
     return 'ok'
 
 def main():