IAPDemo/Libraries/cocos2d/cocos/common/UrlEncodeHelper.cpp

//
//  UrlEncodeHelper.cpp
//  cocos2d_libs
//
//  Created by zhuge on 2018/1/26.
//

#include "UrlEncodeHelper.h"

unsigned char ToHex(unsigned char x) {   
    return  x > 9 ? x + 55 : x + 48;   
}

unsigned char FromHex(unsigned char x) {   
    unsigned char y;  
    if (x >= 'A' && x <= 'Z') y = x - 'A' + 10;  
    else if (x >= 'a' && x <= 'z') y = x - 'a' + 10;  
    else if (x >= '0' && x <= '9') y = x - '0';  
    else assert(0);  
    return y;  
}  

string UrlEncodeHelper::url_encode(const string &str) {
    std::string strTemp = "";  
    size_t length = str.length();  
    for (size_t i = 0; i < length; i++)  
    {  
        if (isalnum((unsigned char)str[i]) ||   
            (str[i] == '-') ||  
            (str[i] == '_') ||   
            (str[i] == '.') ||   
            (str[i] == '~'))  
        strTemp += str[i];  
        else if (str[i] == ' ')  
        strTemp += "+";  
        else  
        {  
            strTemp += '%';  
            strTemp += ToHex((unsigned char)str[i] >> 4);  
            strTemp += ToHex((unsigned char)str[i] % 16);  
        }  
    }  
    return strTemp;
}

string UrlEncodeHelper::url_decode(const string &str) {
    std::string strTemp = "";  
    size_t length = str.length();  
    for (size_t i = 0; i < length; i++)  
    {  
        if (str[i] == '+') strTemp += ' ';  
        else if (str[i] == '%')  
        {  
            assert(i + 2 < length);  
            unsigned char high = FromHex((unsigned char)str[++i]);  
            unsigned char low = FromHex((unsigned char)str[++i]);  
            strTemp += high*16 + low;  
        }  
        else strTemp += str[i];  
    }  
    return strTemp; 
}