src: add POST cache/delete method

Add API REST method to delete cache contents.

Resquest payload structure:
{
    'images': ['windows.img', 'linux.img']
}

The client will try to delete as many images in cache as available
with names matching the list of filenames in the 'images' field.

Resquest response structure:
{
    'cache': [
        {'name': 'windows.img', 'size': 2432370213, checksum: '5d4dcc677bc19f40a647d0002f4ade90'},
        {'name': 'linux.img', 'size': 243234534213, checksum: '3eb22f888f88a55ad954f55644e1192e'}
    ]
}

1 files changed, 40 insertions, 0 deletions

diff --git a/src/live/ogOperations.py b/src/live/ogOperations.py
index 6948d98..d557fac 100644
--- a/src/live/ogOperations.py
+++ b/src/live/ogOperations.py
@@ -576,6 +576,46 @@ class OgLiveOperations:
         logging.info('Image creation command OK')
         return image_info
 
+    def cache_delete(self, request, ogRest):
+        images = request.getImages()
+        deleted_images = []
+
+        if not mount_cache():
+            return
+
+        img_dir = OG_CACHE_IMAGE_PATH
+
+        if not os.path.isdir(img_dir):
+            return cache_contents
+
+        for file_name in os.listdir(img_dir):
+            file_path = os.path.join(img_dir, file_name)
+
+            if not os.path.isfile(file_path):
+                continue
+            if not file_name.endswith('.img'):
+                continue
+            if os.sep in file_name:
+                logging.info(f'Detected cache deletion request of filename with a path, ignoring {file_name}')
+                continue
+
+            if file_name in images:
+                os.remove(file_path)
+
+                csum_path = file_path + '.full.sum'
+                if not os.path.isfile(csum_path):
+                    logging.info(f'Missing checksum file for {file_path}')
+                    continue
+
+                os.remove(csum_path)
+
+        result = {'cache': self._get_cache_contents()}
+
+        self._restartBrowser(self._url)
+
+        logging.info('Sending response to cache/delete request')
+        return result
+
     def refresh(self, ogRest):
         self._restartBrowser(self._url_log)