Merge pull request #96 from ral-facilities/DSEGOG-298-Backend-Create-…

…image-hashing-script-for-phash

Replace hashlib.md5 with imagehash.phash in util script

.github/ci_config.yml

@@ -24,7 +24,7 @@ auth:
   private_key_path: /home/runner/work/operationsgateway-api/id_rsa
   public_key_path: /home/runner/work/operationsgateway-api/id_rsa.pub
   jwt_algorithm: RS256
-  access_token_validity_mins: 120
+  access_token_validity_mins: 180
   refresh_token_validity_days: 7
   fedid_server_url: ldap://fed.cclrc.ac.uk:389
   fedid_server_ldap_realm: FED.CCLRC.AC.UK

util/thumbnail_md5_converter.py → util/thumbnail_phash_converter.py

@@ -1,9 +1,12 @@
 import argparse
 import base64
-import hashlib
+import io
+
+import imagehash
+from PIL import Image
 
 """
-This script is used to generate MD5 checksums, used to assert thumbnails in tests
+This script is used to generate perceptual hashes, used to assert thumbnails in tests
 """
 
 parser = argparse.ArgumentParser()
@@ -20,6 +23,7 @@
 BASE64_THUMBNAIL = args.thumbnail
 
 bytes_thumbnail = base64.b64decode(BASE64_THUMBNAIL)
-md5_checksum = hashlib.md5(bytes_thumbnail).hexdigest()
+image = Image.open(io.BytesIO(bytes_thumbnail))
+phash = imagehash.phash(image)
 
-print(f"MD5 Checksum: {md5_checksum}")
+print(f"Perceptual hash: {phash}")