//从 URL 专用格式字符串还原成普通字符串

#include <iconv.h>
#include <iostream>

using namespace std;

char Char2Int(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 Str2Bin(char *str){
char tempWord[2];
char chn;

tempWord[0] = Char2Int(str[0]); //make the B to 11 -- 00001011
tempWord[1] = Char2Int(str[1]); //make the 0 to 0 -- 00000000

chn = (tempWord[0] << 4) | tempWord[1]; //to change the BO to 10110000

return chn;
}

string UrlDecode(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+=Str2Bin(tmp);
i=i+3;
}
else if(str[i]=='+'){
output+=' ';
i++;
}
else{
output+=str[i];
i++;
}
}

return output;
}

// 代码转换操作类 用于将utf-8 格式转成 gb2312
class CodeConverter {
private:
iconv_t cd;
public:
CodeConverter(const char *from_charset,const char *to_charset) {// 构造
cd = iconv_open(to_charset,from_charset);
}

~CodeConverter() {// 析构
iconv_close(cd);
}

int convert(char *inbuf,int inlen,char *outbuf,int outlen) {// 转换输出
char **pin = &inbuf;
char **pout = &outbuf;

memset(outbuf,0,outlen);
return iconv(cd,pin,(size_t *)&inlen,pout,(size_t *)&outlen);
}
};

//输入url_Utf-8 ,输出 gb2312
string Url2Str_Utf8(string instr){
string input;
input=UrlDecode(instr);

const int outlen=instr.length();
char output[outlen];

CodeConverter cc = CodeConverter("utf-8","gb2312");
cc.convert((char *)input.c_str(),strlen(input.c_str()),output,outlen);

return output;
}

//输入url_gb2312 ,输出 gb2312 实际上是直接调用 UrlDecode()
string Url2Str_gb2312(string str){
return UrlDecode(str);
}


//示例程序
/*int main(){
//char out2[OUTLEN];

//+中国哈哈哈终于得了^_^
cout<<"Url2String_gb2312:"<<Url2String_gb2312("%2B%D6%D0%B9%FA%B9%FE%B9%FE%B9%FE%D6%D5%D3%DA%B5%C3%C1%CB%5E_%5E")<<endl;
cout<<"Url2String_Utf8:"<<Url2String_Utf8("%2B%E4%B8%AD%E5%9B%BD%E5%93%88%E5%93%88%E5%93%88%E7%BB%88%E4%BA%8E%E5%BE%97%E4%BA%86%5E_%5E")<<endl;

// utf-8-->gb2312

//cout << "utf-8-->gb2312 in=" << out1 << ",out=" << out2 << endl;
//cout<<Url2String_Utf8(out1);

return 0;
}*/  回复  更多评论