问题
I have no experience whatsoever with using dialog flow so I'm trying to follow this youtube tutorial
to make a bot. Now, the bot works well when I tested it on the DialogFlow console, but it doesn't get deployed on Heroku. Whenever I try to open the url where the app's supposed to be deployed in, I keep on getting "Internal server error" (this used to be {"speech":"","displayText":"","source":"webhook"} before I applied this). It says "Failed to load resource: the server responded with a status of 500 (Internal Server Error)" in the console.
I tried following the docs here but I used Heroku instead of Google Platform and I'm not sure if I'm doing things right.
This is the current build log I got from the latest build:
-----> Node.js app detected
-----> Creating runtime environment
NPM_CONFIG_LOGLEVEL=error
NPM_CONFIG_PRODUCTION=true
NODE_VERBOSE=false
NODE_ENV=production
NODE_MODULES_CACHE=true
-----> Installing binaries
engines.node (package.json): 4.1.1
engines.npm (package.json): unspecified (use default)
Resolving node version 4.1.1...
Downloading and installing node 4.1.1...
Using default npm version: 2.14.4
-----> Restoring cache
Skipping cache restore (not-found)
-----> Building dependencies
Prebuild detected (node_modules already exists)
Rebuilding any native modules
ejs@2.5.7 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/ejs
express@4.16.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/express
accepts@1.3.4 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/accepts
mime-types@2.1.17 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/mime-types
mime-db@1.30.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/mime-db
negotiator@0.6.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/negotiator
array-flatten@1.1.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/array-flatten
body-parser@1.18.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/body-parser
bytes@3.0.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/bytes
content-type@1.0.4 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/content-type
debug@2.6.9 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/debug
ms@2.0.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/ms
depd@1.1.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/depd
http-errors@1.6.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/http-errors
inherits@2.0.3 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/inherits
setprototypeof@1.0.3 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/http-errors/node_modules/setprototypeof
statuses@1.3.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/statuses
iconv-lite@0.4.19 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/iconv-lite
on-finished@2.3.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/on-finished
ee-first@1.1.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/ee-first
qs@6.5.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/qs
raw-body@2.3.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/raw-body
unpipe@1.0.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/unpipe
type-is@1.6.15 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/type-is
media-typer@0.3.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/media-typer
content-disposition@0.5.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/content-disposition
cookie@0.3.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/cookie
cookie-signature@1.0.6 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/cookie-signature
encodeurl@1.0.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/encodeurl
escape-html@1.0.3 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/escape-html
etag@1.8.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/etag
finalhandler@1.1.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/finalhandler
parseurl@1.3.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/parseurl
fresh@0.5.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/fresh
merge-descriptors@1.0.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/merge-descriptors
methods@1.1.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/methods
path-to-regexp@0.1.7 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/path-to-regexp
proxy-addr@2.0.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/proxy-addr
forwarded@0.1.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/forwarded
ipaddr.js@1.5.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/ipaddr.js
range-parser@1.2.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/range-parser
safe-buffer@5.1.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/safe-buffer
send@0.16.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/send
destroy@1.0.4 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/destroy
mime@1.4.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/mime
serve-static@1.13.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/serve-static
setprototypeof@1.1.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/setprototypeof
utils-merge@1.0.1 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/utils-merge
vary@1.1.2 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/vary
node-env-file@0.1.8 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/node-env-file
js@0.1.0 /tmp/build_07222934258aa157e39d784f7e60dd1c/digracesion-make-sandwich-9119d54/node_modules/js
Installing any new modules (package.json)
-----> Caching build
Clearing previous node cache
Saving 2 cacheDirectories (default):
- node_modules
- bower_components (nothing to cache)
-----> Build succeeded!
-----> Discovering process types
Procfile declares types -> web
-----> Compressing...
Done: 11.5M
-----> Launching...
Released v3
https://make-sandwich.herokuapp.com/ deployed to Heroku
Please help me fix this error. I've posted the code here.
additionally, i've tried deploying the app on localhost and i keep getting this error:
Error: Cannot find module 'js'
at Function.Module._resolveFilename (module.js:536:15)
at Function.Module._load (module.js:466:25)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at new View (C:\Users\EtoNalangGamitinMo\Downloads\make-sandwich-master\make-sandwich-master\node_modules\express\lib\view.js:81:14)
at Function.render (C:\Users\EtoNalangGamitinMo\Downloads\make-sandwich-master\make-sandwich-master\node_modules\express\lib\application.js:570:12)
at ServerResponse.render (C:\Users\EtoNalangGamitinMo\Downloads\make-sandwich-master\make-sandwich-master\node_modules\express\lib\response.js:1008:7)
at C:\Users\EtoNalangGamitinMo\Downloads\make-sandwich-master\make-sandwich-master\index.js:22:11
at Layer.handle [as handle_request] (C:\Users\EtoNalangGamitinMo\Downloads\make-sandwich-master\make-sandwich-master\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\EtoNalangGamitinMo\Downloads\make-sandwich-master\make-sandwich-master\node_modules\express\lib\router\route.js:137:13)
回答1:
The problem is that the directions at https://dialogflow.com/docs/getting-started/basic-fulfillment-conversation assume you're using Google's Cloud Functions (GCF). GCF makes it simple to deploy node.js functions without some boilerplate code required to attach those functions to an HTTP endpoint.
Heroku, however, needs to have those endpoints explicitly setup. GCF expects an express-like environment, which is one that Heroku also supports. Based on the barebones Heroku example at https://github.com/heroku/node-js-getting-started/blob/master/index.js, you might need to add lines such as this (which I haven't tested) to invoke your makeSandwich function:
const express = require('express')
const PORT = process.env.PORT || 5000
express()
.use(express.static(path.join(__dirname, 'public')))
.get('/', (req, res) => exports.makeSandwich( req, res ))
.listen(PORT, () => console.log(`Listening on ${ PORT }`));
You'll also need to adjust your package.json to make sure it includes the express package.
来源：https://stackoverflow.com/questions/48161060/dialogflow-app-does-not-get-deployed-in-heroku