new

code/utils/misc.py

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+from datetime import datetime
+from flask import current_app as app
+
+
+def file_date_human(num):
+    return datetime.fromtimestamp(num).strftime("%y-%m-%d %H:%M")
+
+
+def file_size_human(num, HTML=True):
+    space = " " if HTML else " "
+    for x in [space + "B", "KB", "MB", "GB", "TB"]:
+        if num < 1024.0:
+            if x == space + "B":
+                return "%d%s%s" % (num, space, x)
+            return "%3.1f%s%s" % (num, space, x)
+        num /= 1024.0
+
+
+def file_size_MB(num):
+    return "{:,.2f}".format(num / (1024 * 1024))
+
+
+def get_or_none(key, d, none=None):
+    if key in d:
+        return d[key]
+    else:
+        return none
+
+
+def is_path_safe(path):
+    if path.startswith("."):
+        return False
+    if "/." in path:
+        return False
+    return True
+
+
+def is_valid_url(url, qualifying=None):
+    min_attributes = ("scheme", "netloc")
+    qualifying = min_attributes if qualifying is None else qualifying
+    token = urlparse(url)
+    return all([getattr(token, qualifying_attr) for qualifying_attr in qualifying])
+
+
+def path2url(path):
+    return pathname2url(path)
+
+
+def safe_name(s):
+    return safe_string(s, "-_")
+
+
+def safe_path(s):
+    return safe_string(s, "-_/")
+
+
+def safe_string(s, valid, no_repeat=False):
+    """return a safe string, replace non alnum characters with _ . all characters in valid are considered valid."""
+    safe = "".join([c if c.isalnum() or c in valid else "_" for c in s])
+    if no_repeat:
+        safe = re.sub(r"_+", "_", safe)
+    return safe