Python URL Decoder
The function url_decoder in url_decoder.py
from url_decode import url_encoder, url_decoder url = "https://zh.wikipedia.org/zh-tw/%E7%99%BE%E5%88%86%E5%8F%B7%E7%BC%96%E7%A0%81" url = url_decoder(url) print(url) ## output: https://zh.wikipedia.org/zh-tw/百分号编码
def url_decoder(b): # https://zh.wikipedia.org/zh-tw/%E7%99%BE%E5%88%86%E5%8F%B7%E7%BC%96%E7%A0%81 # %21 mean 21hex, => int("21",16) => 33 => chr(33) => "!", result: "!" if type(b)==bytes: b = b.decode("utf-8") #byte can't insert utf8 charater result = bytearray() enter_hex_unicode_mode = 0 hex_tmp = "" now_index = 0 for i in b: if i=='%': #like %51%52, have entered mode, continue appending bytearray enter_hex_unicode_mode = 1 continue if enter_hex_unicode_mode: hex_tmp += i now_index += 1 if now_index==2: #%51%5F len("51")=2 len("5F")=2 result.append(int(hex_tmp, 16) ) hex_tmp = "" now_index = 0 enter_hex_unicode_mode = 0 continue result.append(ord(i)) result = result.decode(encoding="utf-8") return result
#保留字元的百分號編碼 URL_RFC_3986 = { "!": "%21", "#": "%23", "$": "%24", "&": "%26", "'": "%27", "(": "%28", ")": "%29", "*": "%2A", "+": "%2B", ",": "%2C", "/": "%2F", ":": "%3A", ";": "%3B", "=": "%3D", "?": "%3F", "@": "%40", "[": "%5B", "]": "%5D", } def url_encoder(b): # https://zh.wikipedia.org/wiki/%E7%99%BE%E5%88%86%E5%8F%B7%E7%BC%96%E7%A0%81 if type(b)==bytes: b = b.decode(encoding="utf-8") #byte can't insert many utf8 charaters result = bytearray() #bytearray: rw, bytes: read-only for i in b: if i in URL_RFC_3986: for j in URL_RFC_3986[i]: result.append(ord(j)) continue i = bytes(i, encoding="utf-8") if len(i)==1: result.append(ord(i)) else: for c in i: c = hex(c)[2:].upper() result.append(ord("%")) result.append(ord(c[0:1])) result.append(ord(c[1:2])) result = result.decode(encoding="ascii") return result #print(url_encoder("我好棒==%%0.0:)")) ==> '%E6%88%91%E5%A5%BD%E6%A3%92%3D%3D%%0.0%3A%29'