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修复url反转义失败时字符乱码相关bug (#2932 #2935)

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xiongguangjie 2023-10-27 22:49:42 +08:00 committed by GitHub
parent 6d06649a5b
commit 0f94b48823
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1 changed files with 45 additions and 19 deletions
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64
src/Common/strCoding.cpp
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@ -36,20 +36,21 @@ void UnicodeToUTF8(char *pOut, const wchar_t *pText) {
return;
}
char 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);
char HexCharToBin(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 StrToBin(const 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;
char HexStrToBin(const char *str) {
auto high = HexCharToBin(str[0]);
auto low = HexCharToBin(str[1]);
if (high == -1 || low == -1) {
// 无法把16进制字符串转换为二进制
return -1;
}
return (high << 4) | low;
}
string strCoding::UrlEncode(const string &str) {
@ -70,26 +71,51 @@ string strCoding::UrlEncode(const string &str) {
string strCoding::UrlDecode(const string &str) {
string output;
char tmp[2];
size_t i = 0, len = str.length();
while (i < len) {
if (str[i] == '%') {
if (i > len - 3) {
//防止内存溢出
if (i + 3 > len) {
// %后面必须还有两个字节才会反转义
output.append(str, i, len - i);
break;
}
tmp[0] = str[i + 1];
tmp[1] = str[i + 2];
output += StrToBin(tmp);
i = i + 3;
char ch = HexStrToBin(&(str[i + 1]));
if (ch == -1) {
// %后面两个字节不是16进制字符串，转义失败；直接拼接3个原始字符
output.append(str, i, 3);
} else {
output += ch;
}
i += 3;
} else {
output += str[i];
i++;
++i;
}
}
return output;
}
#if 0
#include "Util/onceToken.h"
static toolkit::onceToken token([]() {
auto str0 = strCoding::UrlDecode(
"rtsp%3A%2F%2Fadmin%3AJm13317934%25jm%40111.47.84.69%3A554%2FStreaming%2FChannels%2F101%3Ftransportmode%3Dunicast%26amp%3Bprofile%3DProfile_1");
auto str1 = strCoding::UrlDecode("%j1"); // 测试%后面两个字节不是16进制字符串
auto str2 = strCoding::UrlDecode("%a"); // 测试%后面字节数不够
auto str3 = strCoding::UrlDecode("%"); // 测试只有%
auto str4 = strCoding::UrlDecode("%%%"); // 测试多个%
auto str5 = strCoding::UrlDecode("%%%%40"); // 测试多个非法%后恢复正常解析
auto str6 = strCoding::UrlDecode("Jm13317934%jm"); // 测试多个非法%后恢复正常解析
cout << str0 << endl;
cout << str1 << endl;
cout << str2 << endl;
cout << str3 << endl;
cout << str4 << endl;
cout << str5 << endl;
cout << str6 << endl;
});
#endif
///////////////////////////////windows专用///////////////////////////////////
#if defined(_WIN32)
void UnicodeToGB2312(char* pOut, wchar_t uData)