import argparse import getpass import os import sys from copy import deepcopy from typing import List, Optional, Union from httpie.cli.constants import DEFAULT_FORMAT_OPTIONS, SEPARATOR_CREDENTIALS from httpie.sessions import VALID_SESSION_NAME_PATTERN class KeyValueArg: """Base key-value pair parsed from CLI.""" def __init__(self, key: str, value: Optional[str], sep: str, orig: str): self.key = key self.value = value self.sep = sep self.orig = orig def __eq__(self, other: 'KeyValueArg'): return self.__dict__ == other.__dict__ def __repr__(self): return repr(self.__dict__) class SessionNameValidator: def __init__(self, error_message: str): self.error_message = error_message def __call__(self, value: str) -> str: # Session name can be a path or just a name. if (os.path.sep not in value and not VALID_SESSION_NAME_PATTERN.search(value)): raise argparse.ArgumentError(None, self.error_message) return value class Escaped(str): """Represents an escaped character.""" def __repr__(self): return f"Escaped({repr(str(self))})" class KeyValueArgType: """A key-value pair argument type used with `argparse`. Parses a key-value arg and constructs a `KeyValueArg` instance. Used for headers, form data, and other key-value pair types. """ key_value_class = KeyValueArg def __init__(self, *separators: str): self.separators = separators self.special_characters = set('\\') for separator in separators: self.special_characters.update(separator) def __call__(self, s: str) -> KeyValueArg: """Parse raw string arg and return `self.key_value_class` instance. The best of `self.separators` is determined (first found, longest). Back slash escaped characters aren't considered as separators (or parts thereof). Literal back slash characters have to be escaped as well (r'\\'). """ tokens = self.tokenize(s) # Sorting by length ensures that the longest one will be # chosen as it will overwrite any shorter ones starting # at the same position in the `found` dictionary. separators = sorted(self.separators, key=len) for i, token in enumerate(tokens): if isinstance(token, Escaped): continue found = {} for sep in separators: pos = token.find(sep) if pos != -1: found[pos] = sep if found: # Starting first, longest separator found. sep = found[min(found.keys())] key, value = token.split(sep, 1) # Any preceding tokens are part of the key. key = ''.join(tokens[:i]) + key # Any following tokens are part of the value. value += ''.join(tokens[i + 1:]) break else: raise argparse.ArgumentTypeError(f'{s!r} is not a valid value') return self.key_value_class(key=key, value=value, sep=sep, orig=s) def tokenize(self, s: str) -> List[Union[str, Escaped]]: r"""Tokenize the raw arg string There are only two token types - strings and escaped characters: >>> KeyValueArgType('=').tokenize(r'foo\=bar\\baz') ['foo', Escaped('='), 'bar', Escaped('\\'), 'baz'] """ tokens = [''] characters = iter(s) for char in characters: if char == '\\': char = next(characters, '') if char not in self.special_characters: tokens[-1] += '\\' + char else: tokens.extend([Escaped(char), '']) else: tokens[-1] += char return tokens class AuthCredentials(KeyValueArg): """Represents parsed credentials.""" def has_password(self) -> bool: return self.value is not None def prompt_password(self, host: str): prompt_text = f'http: password for {self.key}@{host}: ' try: self.value = self._getpass(prompt_text) except (EOFError, KeyboardInterrupt): sys.stderr.write('\n') sys.exit(0) @staticmethod def _getpass(prompt): # To allow easy mocking. return getpass.getpass(str(prompt)) class AuthCredentialsArgType(KeyValueArgType): """A key-value arg type that parses credentials.""" key_value_class = AuthCredentials def __call__(self, s): """Parse credentials from `s`. ("username" or "username:password"). """ try: return super().__call__(s) except argparse.ArgumentTypeError: # No password provided, will prompt for it later. return self.key_value_class( key=s, value=None, sep=SEPARATOR_CREDENTIALS, orig=s ) parse_auth = AuthCredentialsArgType(SEPARATOR_CREDENTIALS) def readable_file_arg(filename): try: with open(filename, 'rb'): return filename except IOError as ex: raise argparse.ArgumentTypeError(f'{filename}: {ex.args[1]}') def parse_format_options(s: str, defaults: Optional[dict]) -> dict: """ Parse `s` and update `defaults` with the parsed values. >>> parse_format_options( ... defaults={'json': {'indent': 4, 'sort_keys': True}}, ... s='json.indent:2,json.sort_keys:False', ... ) {'json': {'indent': 2, 'sort_keys': False}} """ value_map = { 'true': True, 'false': False, } options = deepcopy(defaults or {}) for option in s.split(','): try: path, value = option.lower().split(':') section, key = path.split('.') except ValueError: raise argparse.ArgumentTypeError(f'invalid option {option!r}') if value in value_map: parsed_value = value_map[value] else: if value.isnumeric(): parsed_value = int(value) else: parsed_value = value if defaults is None: options.setdefault(section, {}) else: try: default_value = defaults[section][key] except KeyError: raise argparse.ArgumentTypeError( f'invalid key {path!r}') default_type, parsed_type = type(default_value), type(parsed_value) if parsed_type is not default_type: raise argparse.ArgumentTypeError( 'invalid value' f' {value!r} in {option!r}' f' (expected {default_type.__name__}' f' got {parsed_type.__name__})' ) options[section][key] = parsed_value return options PARSED_DEFAULT_FORMAT_OPTIONS = parse_format_options( s=','.join(DEFAULT_FORMAT_OPTIONS), defaults=None, ) class UnsortedAction(argparse.Action): def __call__(self, *args, **kwargs): return 1