The US ASCII Character Set corresponding code can solve the transmission problem of special symbols in the URL

The US ASCII Character Set

US ASCII, ANSI x3.4-1986 (ISO 646 International Reference Version)

Codes 0 through and 127 (decimal) are unprintable control characters.
Code (decimal) is a nonprinting spacing character. Codes through 126 (decimal) is printable graphic characters.

Legend:  Char      The printed representation of the character, if any  Dec      The decimal code for the character  Row/co L  The decimal row/column representation for the character  Oct      the octal (base 8) code for TH E character  Hex      the hexadecimal (base) code for the character

Char Dec col/row Oct Hex  Name and Description

       0 00/00 xx NUL ([email protected]) NULL 1 00/01 SOH (ctrl-a) START of HEADING   2 00/02 (ctrl-b) START of text 3 00/03 ETX (ctrl-c) END of text 4 00/04 04 EOT (ctrl-d) END of transmission 5 00/05 ENQ (CTRL-E) Enquiry 6 00/06 ACK (Ct       RL-F) Acknowledge 7 00/07, BEL (ctrl-g) BELL (Beep) 8 00/08 BS (ctrl-h) BACKSPACE 9 00/09 HT (ctrl-i) Horizontal TAB 00/10 0A LF (ctrl-j) line FEED 11 00/11 1 3 0B VT (ctrl-k) VERTICAL TAB 00/12 0C FF (ctrl-l) FORM FEED 00/13 0D CR (ctrl-m      ) Carriage RETURN 00/14 0E SO (ctrl-n) shift out of 00/15 0F SI (Ctrl-o) shift in 01/00 DLE (ctrl-p) DATA LINK ESCAPE 01/01 DC1 (ctrl-q) DEVICE CONTROL 1 (XON) 1  8 01/02 DC2(Ctrl-r) Device Control 2 01/03 DC3 (ctrl-s) DEVICE control 3 (XOFF) 01/04 (DC4) D Evice CONTROL 4 01/05 NAK (ctrl-u) negative acknowledge (01/06) SYN (ctrl-v) SYNCH Ronous IDLE 01/07 ETB (ctrl-w) END of transmission BLOCK 01/08-CAN (ctrl-x) Canc    EL 01/09-EM (ctrl-y) END of MEDIUM 01/10 1 a SUB (ctrl-z) substitute 27 01/11 1 b ESC (ctrl-[) escape 01/12 1C FS (ctrl-\) FILE SEPARATOR 01/13 1D GS (Ctr L]) GROUP SEPARATOR 01/14 1E RS (ctrl-^) RECORD SEPARATOR 01/15 PNs 1F US (ctrl-_) UNI T SEPARATOR

() 02/00 + SPACE (!)   02/01 exclamation mark (") 02/02 quotation mark (#) 35 02/03   Total number sign ($) 02/04-DOLLAR sign (%)  PNS 02/05 PERCENT sign (&) 02/06-AMPERSAND (') 39 02/07 47                 Apostrophe (() 02/08 parenthesis ()) 41 02/09 51 29 Right parenthesis (*) 02/10 2A ASTERISK (+)-02/11 2B PLUS Sign   (,) 02/12 2C COMMA (-) 02/13 2D hyphen, minus sign (.)    02/14 2E PERIOD, full STOP (/) 02/15 2F solidus, SLASH (0) 48 03/00                 DIGIT ZERO (1) 03/01 DIGIT One (2) 50 03/02 62 32 DIGIT(3) Wuyi 03/03 DIGIT Three (4) 03/04 DIGIT Four (5) 53 03/05                 DIGIT FIVE (6) 03/06 DIGIT SIX (7) 55 03/07 67 37   DIGIT SEVEN (8) 03/08, DIGIT EIGHT (9), 03/09-DIGIT (:)   03/10 3 a COLON (;) 03/11 3B Semicolon (<) 03/12 3C Less-than sign, left ANGLE bracket (=) 03/13 3D EQUALS sign (>) 03/14 3E Greater-than   Ngle bracket (?)   03/15 3F QUESTION MARK (@) 04/00 commercial at sign (A) 65 04/01 101 Capital Letter A (B) 04/02 102 $ letter B (C) 67 04/03 103 4 3 Capital Letter C (D) 04/04 104 CapitAL Letter D (e) 04/05-E (F) 04/06 106-Lette   R F (G) 04/07 107 Capital Letter G (h) 04/08-Capital Letter H (I) 04/09 111 (j) 04/10 4 a capital letter J (K) 75 04/  113 4 B Capital Letter K (L) 04/12 4C Capital Letter L (M) 77 04/13 115                 4D Capital Letter M (N) 04/14-4E Capital Letter N (O) 04/15 117 4F                 Capital Letter O (p) 05/00-Capital Letter P (Q) 81 05/01 121 51 Capital Letter Q (R) 05/02 122-Capital Letter R (S) 05/03 123-CAPI TAL Letter S (T) 05/04 124-Capital Letter T (U)-05/05-LETT ER U (V) 86 05/06 126  $ Letter V (W) 05/07 127-Capital Letter W (X) 88 05/08 130 58                 Capital Letter X (Y) 05/09 131 $ letter Y (Z) 05/10 5A                 Capital Letter Z ([) 05/11 133 5B left SQUARE bracket (\) 05/12 134 5C                 REVERSE Solidus (backslash) (]) 05/13 135 5D Right SQUARE bracket (^) 94 05/14 136 5E                 Circumflex ACCENT (_) 05/15 137 5F Low Line, underline (') 96 06/00 140 60 GRAVE ACCENT (a) 06/01 141-SMALL Letter A (b) 98 06/02 142-SMALL Lette  R b (c) 06/03 143 SMALL letter C (d) 06/04 144 © SMALL letter D (E) 101  06/05 145 SMALL Letter E (f) 102 06/06 146 $ SMALL Letter F (g) 103 06/07 147 SMALL letter G (h) 104 06/08 SMALL Letter H (i) 06/09 151-SMALL Letter I (j ) 106 06/10 6A SMALL Letter J (k) 107 06/11 153 6B SMALL Letter K (l) 108 06/1                 2 154 6C SMALL letter L (m) 109 06/13 155 6D SMALL Letter M (n) 06/14 156 6E                 SMALL Letter N (o) 111 06/15 157 6F SMALL letter O (P) 112 07/00 160 70 SMALL Letter P (q) 113 07/01 161, SMALL letter Q (R) 07/02 162, SMALL let TER R (s) 07/03 163 SMALL letter S (t) 07/04 164-SMALL Letter T (u) 11 7 07/05 165 SMALL Letter U (v) 118 07/06 166-SMALL Letter V (w) 119 07/07 16                 7 SMALL Letter W (x) 07/08 SMALL letter X (y) 121 07/09 171 79 SMALL Letter Y(z) 122 07/10 172 7A SMALL Letter Z ({) 123 07/11 173 7B left CURLY bracket, left B  RACE (|) 124 07/12 174 7C VERTICAL Line, VERTICAL BAR (}) 07/13 175 7D Right CURLY Bracke T, right brace (~) 126 07/14 176 7E Tilde

     127  07/15  177  7F   RUB (Ctrl-?)  Rubout (DELETE)

The US ASCII Character Set corresponding code can solve the transmission problem of special symbols in the URL