Updated recovery logic to fall back on older version if no image-hash is valid

iotclient/iot_client.py

@@ -73,11 +73,13 @@ def update_image(identifier, image_path, metadata_payload):
     return True
 
 
-def get_image(identifier):
+def get_image(identifier, version=None):
     print("Getting image with identifier " + identifier)
 
     baseurl = "http://127.0.0.1:8000"
     get_url = "/image/get/" + identifier
+    if version is not None:
+        get_url = get_url + "/version/"+str(version)
 
     try:
         response = requests.get(baseurl + get_url)
@@ -248,6 +250,7 @@ while (command.lower() not in ["exit", "quit", "end"]):
         print("trigger - next image in line is sent to backend")
         print("update - next image in line is updated in backend")
         print("fetch - gets the next image from database if exists")
+        print("fetchversion - gets the next image with specified version from database if exists")
         print("fetchall - get all images")
         print("delete - delets the next image from db if exists")
         print("deleteall - delets all images from the service")
@@ -354,6 +357,25 @@ while (command.lower() not in ["exit", "quit", "end"]):
         get_image(filename[:-4])
         print_cursor()
 
+    if command.lower() == "fetchversion":
+        if (len(attributes) < 1):
+            print("Error: No version supplied")
+            continue
+        if not attributes[0].isnumeric():
+            print("Version is no number")
+            continue
+        version = int(attributes[0])
+        if metadata is None:
+            print("No metadata loaded")
+            continue
+        if image_folder is None:
+            print("No image folder selected")
+            continue
+        meta_payload = metadata[index]
+        filename = meta_payload['filename']
+        get_image(filename[:-4], version)
+        print_cursor()
+
     if command.lower() == "fetchall":
         if metadata is None:
             print("No metadata loaded")