CSV Parsing in openFrameworks

parser.cpp

    ofHttpResponse response = ofLoadURL("http://lvaqi.org/data/data.txt");
    
    if(response.status == 200 /* successfully http response */) {
        ofBuffer buffer = response.data;
        
        string lastLine = ""; // empty for the moment
        
        // we are going to cycle through until we come to the last line.
        // since we stop when the variable is !buffer.isLastLine(), the last line
        // will fill the lastLine variable.
        do {
            lastLine = buffer.getNextLine();
        } while(!buffer.isLastLine());
        
        ofLogNotice() << "The last line is: " << lastLine;
        
        if(lastLine.empty()) {
            ofLogError() << "There was no data in the last line ... probably should quit."
        }
        
        vector<string> tokens = ofSplitString(lastLine,",",true);
        
        if(tokens.size() >= 5) {
            // this parces the last line into separate arrays
            int _temp = ofToInt(tokens[1]);
            int _hum  = ofToInt(tokens[2]);
            int _o3   = ofToInt(tokens[3]);
            int _co   = ofToInt(tokens[4]);
            //maps arrays into new variables
            float temp = ofMap(_temp, 0, 100, 0, ofGetWidth()/2);
            float hum  = ofMap(_hum, 0, 50, 0, ofGetWidth()/2);
            float o3   = ofMap(_o3, 0, 1200, 0, ofGetWidth()/2);
            float co   = ofMap(_co, 0, 1200, 0, ofGetWidth()/2);
    
            ofLogNotice() << "Temp = " << temp;
            ofLogNotice() << "Hum  = " << hum;
            ofLogNotice() << "O3   = " << o3;
            ofLogNotice() << "CO   = " << co;
    
        } else {
            ofLogError() << "There were only " << tokens.size() << " tokens parse, and we need at least 5.";
        }
    
    } else {
        ofLogError() << "Unsuccessful data load: " << response.status << " : " << response.error;
    }