A c ++ class for URL encoding and decoding

# Pragma once # include <iostream> # include <string> # include <windows. h> using namespace STD; Class strcoding {public: strcoding (void );~ Strcoding (void); void utf_8togb2312 (string & pout, char * ptext, int Plen); // convert utf_8 to gb2312 void gb2312toutf_8 (string & pout, char * ptext, int Plen ); // convert gb2312 to utf_8 string url2312 (char * Str); // url2312 encoding string urlutf8 (char * Str); // urlutf8 encoding string urlutf8decode (string Str ); // urlutf8 decoding string url2312decode (string Str); // url2312 decoding PRIVATE: void gb2312tounicode (wchar * pout, char * gbbuffer); V Oid utf_8tounicode (wchar * pout, char * ptext); void unicodetoutf_8 (char * pout, wchar * ptext); void unicodetogb2312 (char * pout, wchar udata ); char chartoint (char ch); char strtobin (char * Str) ;};# include "stdafx. H "# include ". \ urlcodeing. H "// This is a class strcoding (strcoding. CPP file) strcoding: strcoding (void) {} strcoding ::~ Strcoding (void) {} void strcoding: gb2312tounicode (wchar * pout, char * gbbuffer) {: multibytetowidechar (cp_acp, mb_precomposed, gbbuffer, 2, pout, 1 ); return;} void strcoding: utf_8tounicode (wchar * pout, char * ptext) {char * uchar = (char *) pout; uchar [1] = (ptext [0] & 0x0f) <4) + (ptext [1]> 2) & 0x0f ); uchar [0] = (ptext [1] & 0x03) <6) + (ptext [2] & 0x3f); return;} void strcoding :: unicodetoutf_8 (char * pout, wchar * ptext) {// pay attention to the order of the wchar high and low characters. The low bytes are in front, and the high byte is in the back char * pchar = (char *) ptext; pout [0] = (0xe0 | (pchar [1] & 0xf0)> 4 )); pout [1] = (0x80 | (pchar [1] & 0x0f) <2) + (pchar [0] & 0xc0)> 6 ); pout [2] = (0x80 | (pchar [0] & 0x3f); return;} void strcoding: unicodetogb2312 (char * pout, wchar udata) {widechartomultibyte (cp_acp, null, & udata, 1, pout, sizeof (wchar), null, null); Return ;}// use char strcoding for URL Decoding :: chartoint (char ch) {If (CH> = '0' & Ch <= '9') Return (char) (CH-'0 '); if (CH> = 'A' & Ch <= 'F') Return (char) (CH-'A' + 10 ); if (CH> = 'A' & Ch <= 'F') Return (char) (CH-'A' + 10); Return-1;} Char strcoding :: strtobin (char * Str) {char tempword [2]; char CHN; tempword [0] = chartoint (STR [0]); // make the B to 11 -- 00001011 tempword [1] = chartoint (STR [1]); // make the 0 to 0 -- 00000000 CHN = (tempword [0] <4) | tempword [1]; // to change the Bo to 10110000 return CHN ;} // convert utf_8 to gb2312void strcoding: utf_8togb2312 (string & pout, char * ptext, int Plen) {char Buf [4]; char * rst = new char [Plen + (Plen> 2) + 2]; memset (BUF, 0, 4); memset (RST, 0, Plen + (Plen> 2) + 2); int I = 0; Int J = 0; while (I <Plen) {If (* (ptext + I)> = 0) {rst [J ++] = ptext [I ++];} else {wchar wtemp; utf_8tounicode (& wtemp, ptext + I); unicodetogb2312 (BUF, wtemp ); unsigned short int TMP = 0; TMP = rst [J] = Buf [0]; TMP = rst [J + 1] = Buf [1]; TMP = rst [J + 2] = Buf [2]; // newbuf [J] = ctemp [0]; // newbuf [J + 1] = ctemp [1]; I + = 3; j + = 2 ;}} rst [J] = '\ 0'; pout = RST; Delete [] RST;} // convert gb2312 to UTF-8void strcoding :: gb2312toutf_8 (string & pout, char * ptext, int Plen) {char Buf [4]; memset (BUF, 0, 4); pout. clear (); int I = 0; while (I <Plen) {// if it is an English copy, you can use if (ptext [I]> = 0) {char asciistr [2] = {0}; asciistr [0] = (ptext [I ++]); pout. append (asciistr);} else {wchar pbuffer; gb2312tounicode (& pbuffer, ptext + I); unicodetoutf_8 (BUF, & pbuffer); pout. append (BUF); I + = 2 ;}} return ;}// encode STR as the gb2312 URL encode in the webpage, which remains unchanged in English, double Bytes of Chinese characters such as % 3d % AE % 88 string strcoding: url2312 (char * Str) {string dd; size_t Len = strlen (STR); For (size_t I = 0; I <Len; I ++) {If (isalnum (byte) STR [I]) {char tempbuff [2]; sprintf (tempbuff, "% C ", STR [I]); DD. append (tempbuff);} else if (isspace (byte) STR [I]) {DD. append ("+");} else {char tempbuff [4]; sprintf (tempbuff, "% x", (byte *) Str) [I]> 4, (byte *) Str) [I] % 16); DD. append (tempbuff);} return dd;} // encode STR as the UTF-8 URL encode in the web page, which remains unchanged in English. Three bytes of Chinese characters, such as % 3d % AE % 88 string strcoding :: urlutf8 (char * Str) {string tt; string dd; gb2312toutf_8 (TT, STR, (INT) strlen (STR); size_t Len = TT. length (); For (size_t I = 0; I <Len; I ++) {If (isalnum (byte) TT. at (I) {char tempbuff [2] = {0}; sprintf (tempbuff, "% C", (byte) TT. at (I); DD. append (tempbuff);} else if (isspace (byte) TT. at (I) {DD. append ("+");} else {char tempbuff [4]; sprintf (tempbuff, "% x", (byte) TT. at (I)> 4, (byte) TT. at (I) % 16); DD. append (tempbuff) ;}} return dd ;}// decodes URL gb2312 from string strcoding: url2312decode (string Str) {string output = ""; char TMP [2]; int I = 0, idx = 0, ndx, Len = Str. length (); While (I <Len) {If (STR [I] = '%') {TMP [0] = STR [I + 1]; TMP [1] = STR [I + 2]; Output + = strtobin (TMP); I = I + 3;} else if (STR [I] = '+ ') {output + = ''; I ++;} else {output + = STR [I]; I ++ ;}} return output ;} // decodes URL utf8 from string strcoding: urlutf8decode (string Str) {string output = ""; string temp = url2312decode (STR); // utf_8togb2312 (output, (char *) temp. data (), strlen (temp. data (); Return output ;}