c++ - 'std::out_of_range' on substr string -


i got small problem in 1 of scripts. have connection websocket , messages sent server client. format json. wrote simple interpreter searching quotes.

the function header: processevent( string msg )

the function starts this:

  size_t hastype = msg.find("type");   size_t length = msg.size();     /* type */     string date, name, message, color, room, roomname;     int pos = msg.find("type");     if(pos!=std::string::npos) {       msg = msg.substr(pos+7);       int pos2 = msg.find_first_of("\"");       string type = msg.substr(0, pos2);       msg = msg.substr(pos2);

the basic problem on part:

        /* message */         pos = msg.find("message");         if(pos!=std::string::npos) {           msg = msg.substr(pos+10);           pos2 = msg.find_first_of("\""); cout << msg << endl; console_print("size: "+util_tostring(msg.size())+", pos2: "+util_tostring(pos2));           message = msg.substr(0, pos2);           msg = msg.substr(pos2);         } else { message = "empty"; }

as can see tried debug problem. problem occurs on messages huge length (this thing coming data). return of second debug this:

size: 949, pos2: -1

the problem now, example input client this:

lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. @ vero eos et accusam et justo duo dolores et ea rebum. stet clita kasd gubergren, no sea takimata sanctus est lorem ipsum dolor sit amet. lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. @ vero eos et accusam et justo duo dolores et ea rebum. stet clita kasd gubergren, no sea takimata sanctus est lorem ipsum dolor sit amet. lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. @ vero eos et accusam et justo duo dolores et ea rebum. stet clita kasd gubergren, no sea takimata sanctus est lorem ipsum dolor sit amet.

duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis @ vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.

ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis @ vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.

nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer

this 300 chars lorem ipsum. text if debug print isn't 300 chars anymore:

lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. @ vero eos et accusam et justo duo dolores et ea rebum. stet clita kasd gubergren, no sea takimata sanctus est lorem ipsum dolor sit amet. lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. @ vero eos et accusam et justo duo dolores et ea rebum. stet clita kasd gubergren, no sea takimata sanctus est lorem ipsum dolor sit amet. lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. @ vero eos et accusam et justo duo dolores et ea rebum. stet clita kasd gubergren, no sea takimata sanctus est lorem ipsum dolor sit amet. duis autem vel eum iriure dolor in hendrerit in vulputate

that reason why couldnt find trailing quote message. on first text there isnt trailing quote also, used copy text input, isnt normal format. main problem not missing quote, string stripped without reason. whole exception this:

terminate called after throwing instance of 'std::out_of_range'   what():  basic_string::substr aborted

what reason string cut this?


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