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End asyncStream later in the process (before piping) #185

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Sep 22, 2017
Merged

End asyncStream later in the process (before piping) #185

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a1fb334
End asyncStream later in the process (before piping)
Sep 21, 2017
7d91770
Address comments + add test (would fail without without the new changes)
Sep 21, 2017
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7 changes: 4 additions & 3 deletions lib/request-handler.js
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,10 @@ module.exports = function processRequest(options, request, response) {
} = options;

const asyncStream = new AsyncStream();
asyncStream.once('plugged', () => {
asyncStream.end();
});

const contextPromise = fetchContext(request).catch(err => {
this.emit('context:error', request, err);
return {};
Expand Down Expand Up @@ -195,9 +199,6 @@ module.exports = function processRequest(options, request, response) {
});

resultStream.once('finish', () => {
// Flush the async stream only after stringifer stream is finished
// This guarentees the async fragments are flushed to the client at last
asyncStream.end();
const statusCode = response.statusCode || 200;
if (shouldWriteHead) {
shouldWriteHead = false;
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2 changes: 2 additions & 0 deletions lib/streams/stringifier-stream.js
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Expand Up @@ -22,6 +22,8 @@ module.exports = class StringifierStream extends stream.Transform {
}
let st = this.queue.shift();
if (st instanceof stream) {
st.emit('plugged');
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would only emit this if its a instance of async stream though. Totally useless for other fragment streams.

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Currently yes, but I didn't want to mix up knowledge of async stream into the stringifier stream

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In that case we would need alternative way of handling for this particular instance.


st.setMaxListeners(st.getMaxListeners() + 1);
this.isBusy = true;

Expand Down