Python中url的编码以及解码

当有些请求，或者地址中的汉字以及特殊符号不编码使用不了时候，则需要去把中文进行编码，有些地址拿到之后，需要进行解码，不然中文会变成百分号加几个字母和数字的形式

1.url编码

from urllib.parse import quote

# 将字符串‘程序设计’进行编码
text = quote("程序设计", 'utf-8')
print(text)
# 打印结果
# %E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1

2.url解码

from urllib.parse import unquote

# 对字符串‘%E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1’进行解密
text = unquote("%E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1", 'utf-8')
print(text)
# 打印结果
# 程序设计

3.源码

def quote(string, safe='/', encoding=None, errors=None):
    """quote('abc def') -> 'abc%20def'

    Each part of a URL, e.g. the path info, the query, etc., has a
    different set of reserved characters that must be quoted. The
    quote function offers a cautious (not minimal) way to quote a
    string for most of these parts.

    RFC 3986 Uniform Resource Identifier (URI): Generic Syntax lists
    the following (un)reserved characters.

    unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
    reserved      = gen-delims / sub-delims
    gen-delims    = ":" / "/" / "?" / "#" / "[" / "]" / "@"
    sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
                  / "*" / "+" / "," / ";" / "="

    Each of the reserved characters is reserved in some component of a URL,
    but not necessarily in all of them.

    The quote function %-escapes all characters that are neither in the
    unreserved chars ("always safe") nor the additional chars set via the
    safe arg.

    The default for the safe arg is '/'. The character is reserved, but in
    typical usage the quote function is being called on a path where the
    existing slash characters are to be preserved.

    Python 3.7 updates from using RFC 2396 to RFC 3986 to quote URL strings.
    Now, "~" is included in the set of unreserved characters.

    string and safe may be either str or bytes objects. encoding and errors
    must not be specified if string is a bytes object.

    The optional encoding and errors parameters specify how to deal with
    non-ASCII characters, as accepted by the str.encode method.
    By default, encoding='utf-8' (characters are encoded with UTF-8), and
    errors='strict' (unsupported characters raise a UnicodeEncodeError).
    """
    if isinstance(string, str):
        if not string:
            return string
        if encoding is None:
            encoding = 'utf-8'
        if errors is None:
            errors = 'strict'
        string = string.encode(encoding, errors)
    else:
        if encoding is not None:
            raise TypeError("quote() doesn't support 'encoding' for bytes")
        if errors is not None:
            raise TypeError("quote() doesn't support 'errors' for bytes")
    return quote_from_bytes(string, safe)

def unquote(string, encoding='utf-8', errors='replace'):
    """Replace %xx escapes by their single-character equivalent. The optional
    encoding and errors parameters specify how to decode percent-encoded
    sequences into Unicode characters, as accepted by the bytes.decode()
    method.
    By default, percent-encoded sequences are decoded with UTF-8, and invalid
    sequences are replaced by a placeholder character.

    unquote('abc%20def') -> 'abc def'.
    """
    if '%' not in string:
        string.split
        return string
    if encoding is None:
        encoding = 'utf-8'
    if errors is None:
        errors = 'replace'
    bits = _asciire.split(string)
    res = [bits[0]]
    append = res.append
    for i in range(1, len(bits), 2):
        append(unquote_to_bytes(bits[i]).decode(encoding, errors))
        append(bits[i + 1])
    return ''.join(res)