c的urldecode

编程技术  /  houtizong 发布于 3年前   137

#include <stdio.h>#include <stdlib.h>#include <string.h>void encodeurl(){    int c;    char *hex = "0123456789abcdef";    while( (c = getchar()) != EOF ){        if( ('a' <= c && c <= 'z')        || ('A' <= c && c <= 'Z')        || ('0' <= c && c <= '9') ){            putchar(c);        } else {            putchar('%');            putchar(hex[c >> 4]);            putchar(hex[c & 15]);        }    }}void hao_urldecode(char *dest, const char *src){    const char *p = src;    char code[3] = {0};    unsigned long ascii = 0;    char *end = NULL;    while(*p)    {        if(*p == '%')        {            memcpy(code, ++p, 2);            ascii = strtoul(code, &end, 16);            *dest++ = (char)ascii;            p += 2;        }        else            *dest++ = *p++;    }}int main(){    char in[] = "ram%40d%20omain.tld";    char out[sizeof in] = {0};    hao_urldecode(out, in);    printf("in == %s\nout == %s\n", in, out);    return 0;}