Enhancements

Fix not processing quotes in ws-headers in Surge VMess configurations.
Fix when default_url is set and insert_url is not set in YAML configuration and access /sub without url argument, the nodes in default_url will be added twice.
Add /version interface to compatible with some front-end.

src/misc.cpp

@@ -438,14 +438,14 @@ std::string getSystemProxy()
 #endif // _WIN32
 }
 
-std::string trim(const std::string& str)
+std::string trim_of(const std::string& str, char target)
 {
-    std::string::size_type pos = str.find_first_not_of(' ');
+    std::string::size_type pos = str.find_first_not_of(target);
     if (pos == std::string::npos)
     {
         return str;
     }
-    std::string::size_type pos2 = str.find_last_not_of(' ');
+    std::string::size_type pos2 = str.find_last_not_of(target);
     if (pos2 != std::string::npos)
     {
         return str.substr(pos, pos2 - pos + 1);
@@ -453,6 +453,16 @@ std::string trim(const std::string& str)
     return str.substr(pos);
 }
 
+std::string trim(const std::string& str)
+{
+    return trim_of(str, ' ');
+}
+
+std::string trim_quote(const std::string &str)
+{
+    return trim_of(str, '\"');
+}
+
 std::string getUrlArg(const std::string &url, const std::string &request)
 {
     //std::smatch result;