feat contrib: aiogram 3

Relates: https://st.yandex-team.ru/, https://st.yandex-team.ru/

1 files changed, 117 insertions, 0 deletions

diff --git a/library/python/strings/strings.py b/library/python/strings/strings.py
index f5fa2d32c6a..d068f30b766 100644
--- a/library/python/strings/strings.py
+++ b/library/python/strings/strings.py
@@ -176,3 +176,120 @@ def fix_utf8(data):
     # remove destroyed symbol code
     udata = six.ensure_text(data, 'utf-8', 'ignore')
     return six.ensure_str(udata, 'utf-8', errors='ignore')
+
+
+_hexdig = "0123456789ABCDEFabcdef"
+_hextobyte = {
+    (a + b).encode(): bytes.fromhex(a + b) if six.PY3 else (a + b).decode("hex") for a in _hexdig for b in _hexdig
+}
+
+
+def parse_qs_binary(qs, keep_blank_values=False, strict_parsing=False, max_num_fields=None, separator=b'&'):
+    """Parse a query like original `parse_qs` from `urlparse`, `urllib.parse`, but query given as a bytes argument.
+
+    Arguments:
+
+    qs: percent-encoded query string to be parsed
+
+    keep_blank_values: flag indicating whether blank values in
+        percent-encoded queries should be treated as blank byte strings.
+        A true value indicates that blanks should be retained as
+        blank byte strings. The default false value indicates that
+        blank values are to be ignored and treated as if they were
+        not included.
+
+    strict_parsing: flag indicating what to do with parsing errors.
+        If false (the default), errors are silently ignored.
+        If true, errors raise a ValueError exception.
+
+    max_num_fields: int. If set, then throws a ValueError if there
+        are more than n fields read by parse_qsl_binary().
+
+    separator: bytes. The symbol to use for separating the query arguments.
+        Defaults to &.
+
+    Returns a dictionary.
+    """
+    parsed_result = {}
+    pairs = parse_qsl_binary(qs, keep_blank_values, strict_parsing, max_num_fields=max_num_fields, separator=separator)
+    for name, value in pairs:
+        if name in parsed_result:
+            parsed_result[name].append(value)
+        else:
+            parsed_result[name] = [value]
+    return parsed_result
+
+
+def parse_qsl_binary(qs, keep_blank_values=False, strict_parsing=False, max_num_fields=None, separator=b'&'):
+    """Parse a query like original `parse_qs` from `urlparse`, `urllib.parse`, but query given as a bytes argument.
+
+    Arguments:
+
+    qs: percent-encoded query bytes to be parsed
+
+    keep_blank_values: flag indicating whether blank values in
+        percent-encoded queries should be treated as blank byte strings.
+        A true value indicates that blanks should be retained as blank
+        byte strings. The default false value indicates that blank values
+        are to be ignored and treated as if they were not included.
+
+    strict_parsing: flag indicating what to do with parsing errors. If
+        false (the default), errors are silently ignored. If true,
+        errors raise a ValueError exception.
+
+    max_num_fields: int. If set, then throws a ValueError
+        if there are more than n fields read by parse_qsl_binary().
+
+    separator: bytes. The symbol to use for separating the query arguments.
+        Defaults to &.
+
+    Returns a list.
+    """
+
+    if max_num_fields is not None:
+        num_fields = 1 + qs.count(separator) if qs else 0
+        if max_num_fields < num_fields:
+            raise ValueError('Max number of fields exceeded')
+
+    r = []
+    query_args = qs.split(separator) if qs else []
+    for name_value in query_args:
+        if not name_value and not strict_parsing:
+            continue
+        nv = name_value.split(b'=', 1)
+
+        if len(nv) != 2:
+            if strict_parsing:
+                raise ValueError("bad query field: %r" % (name_value,))
+            # Handle case of a control-name with no equal sign
+            if keep_blank_values:
+                nv.append(b'')
+            else:
+                continue
+        if len(nv[1]) or keep_blank_values:
+            name = nv[0].replace(b'+', b' ')
+            name = unquote_binary(name)
+            value = nv[1].replace(b'+', b' ')
+            value = unquote_binary(value)
+            r.append((name, value))
+    return r
+
+
+def unquote_binary(string):
+    """Replace %xx escapes by their single-character equivalent.
+    By default, percent-encoded sequences are replaced by ASCII character or
+    byte code, and invalid sequences are replaced by a placeholder character.
+
+    unquote('abc%20def') -> 'abc def'
+    unquote('abc%FFdef') -> 'abc\xffdef'
+    unquote('%no') -> '%no'
+    """
+    bits = string.split(b"%")
+    if len(bits) == 1:
+        return bits[0]
+
+    res = [bits[0]]
+    for item in bits[1:]:
+        res.append(_hextobyte.get(item[:2], b"%"))
+        res.append(item if res[-1] == b"%" else item[2:])
+    return b"".join(res)