c++ 实现url的转码与解码 urlencode urldecode
2014-09-03 11:35
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在网上找的代码各种问题,最终根据网上的版本修改实现了自己的一个版本,其中= 不做处理,- _都进行了转码
#include<iostream> #include<stdio.h> using namespace std; static unsigned char char_to_hex( unsigned char x ) { return (unsigned char)(x > 9 ? x + 55: x + 48); } static int is_alpha_number_char( unsigned char c ) { if ( (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') ) return 1; return 0; } //url编码实现 void urlencode( unsigned char * src, int src_len, unsigned char * dest, int dest_len ) { unsigned char ch; int len = 0; while (len < (dest_len - 4) && *src) { ch = (unsigned char)*src; if (*src == ' ') { *dest++ = '+'; } else if (is_alpha_number_char(ch) || strchr("=!~*'()", ch)) { *dest++ = *src; } else { *dest++ = '%'; *dest++ = char_to_hex( (unsigned char)(ch >> 4) ); *dest++ = char_to_hex( (unsigned char)(ch % 16) ); } ++src; ++len; } *dest = 0; return ; } //解url编码实现 unsigned char* urldecode(unsigned char* encd,unsigned char* decd) { int j,i; char *cd =(char*) encd; char p[2]; unsigned int num; j=0; for( i = 0; i < strlen(cd); i++ ) { memset( p, '/0', 2 ); if( cd[i] != '%' ) { decd[j++] = cd[i]; continue; } p[0] = cd[++i]; p[1] = cd[++i]; p[0] = p[0] - 48 - ((p[0] >= 'A') ? 7 : 0) - ((p[0] >= 'a') ? 32 : 0); p[1] = p[1] - 48 - ((p[1] >= 'A') ? 7 : 0) - ((p[1] >= 'a') ? 32 : 0); decd[j++] = (unsigned char)(p[0] * 16 + p[1]); } decd[j] = '/0'; return decd; }
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