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Querying the twitter api with Node.js but getting an error – Twitter-api

I am a newbie to node.js but I am getting a “write after end” error and I am not sure why. I know there are other similar questions but none of them provide a working solution to my problem I am trying to query the twitter api. 

req.on('end', function() {
      var string = JSON.parse(body);
      res.writeHead(200, {
        "Content-Type": "application/json"
      });
      res.end(body);

      var tweetsArray = [];
      var finalTweets = [];

      client.get('search/tweets', {
          q: string.teamname,
          count: 1
        },
        function searchTweets(err, data, listStatuses) {
          for (var index in data.statuses) {
            var tweet = data.statuses[index];
            tweetsArray.push(JSON.stringify(tweet.text));
          }
          /* Callback function to query Twitter for statuses*/
          client.get('statuses/user_timeline', {
              screen_name: string.teamname,
              count: 1
            },
            function listStatuses(err, data, response) {
              for (var index in data) {
                var tweet = data[index];
                tweetsArray.push(JSON.stringify(tweet.text));
              }
              var tweets = JSON.parse(tweetsArray[0]);
              var tweetsB = JSON.parse(tweetsArray[1]);

              finalTweets = tweets.concat(tweetsB);

              res.write(JSON.stringify(finalTweets));

              res.end();

            });

        });
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2

Answers


  1. 0

    You call res.end(body); before even invoking client.get('search/tweets'. Then you have res.write(JSON.stringify(finalTweets)); (and also res.end() again). You can’t close the http response and then write to it.

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  2. 0

    You are calling res.end() near the beginning of your router. This ends the response, and then once your callback is executed you are writing to the response again with res.write(JSON.stringify(finalTweets));.

    response.end([data][, encoding][, callback])

    This method signals to the server that all of the response headers and body have been sent; that server should consider this message complete. The method, response.end(), MUST be called on each response.

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