diff options
| -rw-r--r-- | fg21sim/webui/handlers/configs.py | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/fg21sim/webui/handlers/configs.py b/fg21sim/webui/handlers/configs.py index 18adb65..9736650 100644 --- a/fg21sim/webui/handlers/configs.py +++ b/fg21sim/webui/handlers/configs.py @@ -34,6 +34,7 @@ class ConfigsAJAXHandler(BaseRequestHandler): Supported actions: - get: Get the specified/all configuration values - validate: Validate the configurations and response the errors + - exists: Whether the file already exists NOTE ---- @@ -50,6 +51,15 @@ class ConfigsAJAXHandler(BaseRequestHandler): elif action == "validate": __, errors = self.configs.check_all(raise_exception=False) success = True + elif action == "exists": + filepath = json_decode(self.get_argument("filepath", "null")) + exists, error = self._exists_file(filepath) + if exists is None: + success = False + reason = error + else: + success = True + data["exists"] = exists else: # ERROR: bad action success = False @@ -270,3 +280,33 @@ class ConfigsAJAXHandler(BaseRequestHandler): except (ValueError, OSError) as e: error = str(e) return (success, error) + + @staticmethod + def _exists_file(filepath): + """Check whether the given filepath already exists? + + Parameters + ---------- + filepath: str + The input filepath to check its existence, must be + an *absolute path*. + + Returns + ------- + exists : bool + ``True`` if the filepath already exists, ``False`` if not exists, + and ``None`` if error occurs. + error : str + The error information, and ``None`` if no errors. + """ + exists = None + error = None + try: + filepath = os.path.expanduser(filepath) + if os.path.isabs(filepath): + exists = os.path.exists(filepath) + else: + error = "Not an absolute path: {0}".format(filepath) + except AttributeError: + error = "Invalid input filepath: {0}".format(filepath) + return (exists, error) |