fetchFeedMessageForLine(lineString, function(resp){
            cachedMessage = resp;
            response.send(cachedMessage)
        });

function fetchFeedMessageForLine(line:string, callback: (data:any) => void){

    let url = (feedMessageURLs as any)[line]

    console.log('requesting: '+url);

    http.get(url, (resp:http.IncomingMessage) => {
        console.log('response.');
        let data = Buffer.concat([])

        // A chunk of data has been recieved.
        resp.on('data', (chunk:Buffer) => {
            console.log("ondata")
            data = Buffer.concat([data,chunk])
        });

        // The whole response has been received. Print out the result.
        resp.on('end', () => {
            feedMessages[line] = data
            callback(feedMessages[line]);
            if (resp.statusCode === 200){
                console.log("code: "+resp.statusCode + " got feedmessage for line: "+line)
            } else {
                console.error("ERROR code: "+resp.statusCode + " got feedmessage for line: "+line)
            }
        });

    }).on("error", (err) => {
      console.log("Error: " + err.message);
    });
}