I have a hapi.js route where I want to defer the response. I've tried storing the reply
function and calling it later, or wrapping it in a promise, but hapi always responds immediately with a 500 Internal Server Error response.
Store the reply for later:
var pendingReplies = {};
server.route({
method: "POST",
path: "/",
handler: function (request, reply) {
var id = generateId();
pendingReplies[id] = reply;
}
});
... // reply later by calling:
function sendResponse(id, data) {
pendingReplies[id](data);
}
I've tried creating a promise to reply:
handler: function (request, reply) {
var id = generateId();
return new Promise(function (resolve, reject) {
pendingReplies[id] = resolve;
}).then(function (data) {
return reply(data);
});
}
I've tried using reply().hold()
handler: function (request, reply) {
var id = generateId();
var response = reply().hold();
pendingReplies[id] = function (data) {
response.source = data;
response.send();
};
return response;
}
I've tried using reply().hold()
with a Promise:
handler: function (request, reply) {
var id = generateId();
var response = reply().hold();
return new Promise(function (resolve, reject) {
pendingReplies[id] = resolve;
}).then(function (data) {
response.source = data;
response.send();
return response;
});
}
With each of these, as soon as the handler function exits, I get a 500 response and the following output in the node console:
Debug: internal, implementation, error Error: Uncaught error: socket hang up at createHangUpError (_http_client.js:198:15) at Socket.socketOnEnd (_http_client.js:283:23) at emitNone (events.js:72:20) at Socket.emit (events.js:163:7) at _stream_readable.js:891:16 at process._tickDomainCallback (node.js:388:13)
Is it possible with hapi to reply to a request asynchronously from outside of the route handler?
If an error is thrown within your handler, hapi.js
will immediately exit and give a 500
status code. Check if generateId()
is a valid function.
The rest of your code looks right for your third and fourth examples. reply().hold()
is necessary to keep the connection open after handler
returns.