synchronizing node.js calls

I am writing my first "real" AWS lambda application, and I need to synchronize a couple calls. There don't appear to be "sync" versions of the methods I am calling.

Specifically, I want to make a call to Dynamo, and then use data parsed from the JSON to make an http request.

After having set it up, here's my working Dynamo call...

dynamoDb.get(params, function(err, data)
if (err)
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
else
url = parse(data);
console.log("GetItem succeeded:", JSON.stringify(data, null, 2));

);


I then call an http request using that url...

http.get(url,function(res)
res.on('error', function(err)
console.log(err);
);

res.on('data',function(d)
console.log("received more chunks");
chunks += d;
);

res.on('end',function()
console.log("http request complete");
)



The problem seems to be that the second call doesn't wait for the first one. I have looked into using async/await, but I am not sure how I use those with the error handling callbacks. Examples I have found online are either too general and hard for me to comprehend, or specific without the error handling.

Any idea how I sync these two?

1 Answer
1

Ignoring async/await for the moment, have you tried:

dynamoDb.get(params, function(err, data)
if (err)
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
else
url = parse(data);
console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
http.get(url,function(res)
res.on('error', function(err)
console.log(err);
);

res.on('data',function(d)
console.log("received more chunks");
chunks += d;
);

res.on('end',function()
console.log("http request complete");
);
);

);


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