未找到Heroku（Python）

Question

As a beginner, I just can't get any further. I am trying to load a python program on heroku, but somehow only the following will always appear:

Not Found

The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.

My logs:

2018-02-12T11:33:54.658010+00:00 heroku[web.1]: Starting process with 
command `python app.py`
2018-02-12T11:33:56.853591+00:00 heroku[web.1]: State changed from starting 
to up
2018-02-12T11:33:56.619420+00:00 app[web.1]: Starting app on port 50619
2018-02-12T11:33:56.661819+00:00 app[web.1]:  * Running on 
http://0.0.0.0:50619/ (Press CTRL+C to quit)
2018-02-12T11:34:48.437183+00:00 app[web.1]: 10.5.180.220 - - [12/Feb/2018 
11:34:48] "GET / HTTP/1.1" 404 -
2018-02-12T11:34:48.445571+00:00 heroku[router]: at=info method=GET 
path="/" host=protected-citadel-58416.herokuapp.com request_id=e8d60622-
5acd-4ddf-9b98-87307b1266b7 fwd="79.213.120.187" dyno=web.1 connect=1ms 
service=29ms status=404 bytes=380 protocol=https
2018-02-12T11:40:15.749446+00:00 heroku[router]: at=info method=GET path="/" 
host=protected-citadel-58416.herokuapp.com request_id=8e5c9f8e-c750-48bd-
a8ae-d40e7d3ea1d6 fwd="79.213.120.187" dyno=web.1 connect=0ms service=3ms 
status=404 bytes=380 protocol=https
2018-02-12T11:40:15.743311+00:00 app[web.1]: 10.79.228.240 - - [12/Feb/2018 
11:40:15] "GET / HTTP/1.1" 404 -
2018-02-12T11:40:57.718508+00:00 heroku[router]: at=info method=GET path="/" 
host=protected-citadel-58416.herokuapp.com request_id=312900cd-79d6-4f9c-
9c5b-a40d356219bb fwd="79.213.120.187" dyno=web.1 connect=0ms service=3ms 
status=404 bytes=380 protocol=https
2018-02-12T11:40:57.712039+00:00 app[web.1]: 10.79.228.240 - - [12/Feb/2018 
11:40:57] "GET / HTTP/1.1" 404 -

My program (a dialogflow webhook, could also be the problem):

from __future__ import print_function
from future.standard_library import install_aliases
install_aliases()

from urllib.parse import urlparse, urlencode, quote_plus
from urllib.request import urlopen, Request
from urllib.error import HTTPError

import json
import os

from flask import Flask
from flask import request
from flask import make_response

# Flask app should start in global layout
app = Flask(__name__)


@app.route('/webhook', methods=['POST'])
def webhook():
    req = request.get_json(silent=True, force=True)

    print("Request:")
    print(json.dumps(req, indent=4))

    res = processRequest(req)

    res = json.dumps(res, indent=4)
    # print(res)
    r = make_response(res)
    r.headers['Content-Type'] = 'application/json'
    return r


def processRequest(req):
    print("Request:")
    print(json.dumps(req, indent=4))
    if req.get("result").get("action") == "getpassword":
         baseurl = "http://www.passwordrandom.com/query?command=password&format=json&count=1"
         if yql_query is None:
             return {}
         yql_url = baseurl 
         result = urlopen(yql_url).read()
         data = json.loads(result)
         res = makeWebhookResult(data)
    else:
        return {}
    return res

def makeWebhookResult(data):
    query = data.get('queryresult')
    if queryresult is None:
        return {}

    password = query.get('char')


    # print(json.dumps(item, indent=4))

    speech = "Your new password is " + password

    print("Response:")
    print(speech)

    return {
        "speech": speech,
        "displayText": speech,
        "data": {...},
        "contextOut": [...],
        "source": "WolframAlpha"
    }


if __name__ == '__main__':
    port = int(os.getenv('PORT', 5000))

    print("Starting app on port %d" % port)

app.run(debug=False, port=port, host='0.0.0.0')

My Procfile:

web: python app.py

My requirements.txt:

certifi==2018.1.18
chardet==3.0.4
click==6.7
flake8==3.5.0
Flask==0.12.2
future==0.16.0
idna==2.6
itsdangerous==0.24
Jinja2==2.10
MarkupSafe==1.0
mccabe==0.6.1
pew==1.1.2
pipenv==9.0.3
psutil==5.3.1
pycodestyle==2.3.1
pyflakes==1.6.0
requests==2.18.4
urllib3==1.22
virtualenv==15.1.0
virtualenv-clone==0.2.6
Werkzeug==0.14.1

What am I doing wrong? Thank you very much in advance

This is my template

UPDATE

The code has been changed as suggested.

Log:

2018-02-12T15:12:39.069747+00:00 app[web.1]: Request:
2018-02-12T15:12:39.069877+00:00 app[web.1]: {
2018-02-12T15:12:39.069880+00:00 app[web.1]:     "id": "14fe0cb2-ce54-48cd-9569-87fc55b6cacc",
2018-02-12T15:12:39.069882+00:00 app[web.1]:     "timestamp": "2018-02-12T15:12:38.929Z",
2018-02-12T15:12:39.069884+00:00 app[web.1]:     "lang": "en",
2018-02-12T15:12:39.069885+00:00 app[web.1]:     "result": {
2018-02-12T15:12:39.069886+00:00 app[web.1]:         "source": "agent",
2018-02-12T15:12:39.069887+00:00 app[web.1]:         "resolvedQuery": "make a password",
2018-02-12T15:12:39.069889+00:00 app[web.1]:         "speech": "",
2018-02-12T15:12:39.069890+00:00 app[web.1]:         "action": "getpassword",
2018-02-12T15:12:39.069891+00:00 app[web.1]:         "actionIncomplete": false,
2018-02-12T15:12:39.069892+00:00 app[web.1]:         "parameters": {
2018-02-12T15:12:39.069894+00:00 app[web.1]:             "passwordlenght": ""
2018-02-12T15:12:39.069895+00:00 app[web.1]:         },
2018-02-12T15:12:39.069896+00:00 app[web.1]:         "contexts": [],
2018-02-12T15:12:39.069897+00:00 app[web.1]:         "metadata": {
2018-02-12T15:12:39.069898+00:00 app[web.1]:             "intentId": "f46eb1ca-e0e3-428f-8442-8e6327b935d7",
2018-02-12T15:12:39.069900+00:00 app[web.1]:             "webhookUsed": "true",
2018-02-12T15:12:39.069901+00:00 app[web.1]:             "webhookForSlotFillingUsed": "false",
2018-02-12T15:12:39.069902+00:00 app[web.1]:             "intentName": "GeneratePassword"
2018-02-12T15:12:39.069903+00:00 app[web.1]:         },
2018-02-12T15:12:39.069904+00:00 app[web.1]:         "fulfillment": {
2018-02-12T15:12:39.069906+00:00 app[web.1]:             "speech": "The service is currently not aviable.",
2018-02-12T15:12:39.069907+00:00 app[web.1]:             "messages": [
2018-02-12T15:12:39.069908+00:00 app[web.1]:                 {
2018-02-12T15:12:39.069909+00:00 app[web.1]:                     "type": 0,
2018-02-12T15:12:39.069911+00:00 app[web.1]:                     "speech": "The service is currently not aviable."
2018-02-12T15:12:39.069913+00:00 app[web.1]:                 }
2018-02-12T15:12:39.069915+00:00 app[web.1]:             ]
2018-02-12T15:12:39.069916+00:00 app[web.1]:         },
2018-02-12T15:12:39.069918+00:00 app[web.1]:         "score": 1.0
2018-02-12T15:12:39.069919+00:00 app[web.1]:     },
2018-02-12T15:12:39.069921+00:00 app[web.1]:     "status": {
2018-02-12T15:12:39.069922+00:00 app[web.1]:         "code": 200,
2018-02-12T15:12:39.069924+00:00 app[web.1]:         "errorType": "success",
2018-02-12T15:12:39.069925+00:00 app[web.1]:         "webhookTimedOut": false
2018-02-12T15:12:39.069927+00:00 app[web.1]:     },
2018-02-12T15:12:39.069929+00:00 app[web.1]:     "sessionId": "dbb472ca-cd7d-4c03-b666-66d90b458f22"
2018-02-12T15:12:39.069934+00:00 app[web.1]: }
2018-02-12T15:12:39.341869+00:00 app[web.1]: 10.45.77.75 - - [12/Feb/2018 15:12:39] "POST / HTTP/1.1" 200 -
2018-02-12T15:12:39.344514+00:00 heroku[router]: at=info method=POST path="/" host=protected-citadel-58416.herokuapp.com request_id=842f0891-6768-48e9-a6d8-740b8dc4a8d6 fwd="35.202.154.33" dyno=web.1 connect=2ms service=275ms status=200 bytes=147 protocol=https

JSON from dialogflow:

{
  "id": "947ae098-542c-4208-b49a-eed69fb001fd",
  "timestamp": "2018-02-12T15:30:24.471Z",
  "lang": "en",
  "result": {
    "source": "agent",
    "resolvedQuery": "make a password",
    "action": "getpassword",
    "actionIncomplete": false,
    "parameters": {
      "passwordlenght": ""
    },
    "contexts": [],
    "metadata": {
      "intentId": "f46eb1ca-e0e3-428f-8442-8e6327b935d7",
      "webhookUsed": "true",
      "webhookForSlotFillingUsed": "false",
      "webhookResponseTime": 290,
      "intentName": "GeneratePassword"
    },
    "fulfillment": {
      "messages": [
        {
          "type": 0,
          "speech": "The service is currently not aviable."
        }
      ]
    },
    "score": 1
  },
  "status": {
    "code": 200,
    "errorType": "success",
    "webhookTimedOut": false
  },
  "sessionId": "dbb472ca-cd7d-4c03-b666-66d90b458f22"
}

Answer 1

It looks like you don't have a route set for the / request, just for a POST to the /webhook path. It looks like you're trying to test it by hand by entering in the address to your browser - which won't really help you a lot.

Similarly, it looks like you haven't configured the webhook in Dialogflow to use the /webhook path. In the fulfillment section, you should set the URL for the full URL - including path. It might look something like this (note how it ends with /webhook):

https://YourHostNameHere:50619/webhook

You should be able to use a tool such as curl to hit the URL using a POST. You'll need to make sure it is via HTTPS and that you're sending JSON with a valid header. Possibly something like this

curl -d '{"key1":"value1", "key2":"value2"}' -H "Content-Type: application/json" -X POST https://YourHostNameHere:50619/webhook

or, if you have the JSON in a file

curl -d "@file.json" -X POST https://YourHostNameHere:50619/webhook

You can also try through Dialogflow's test sidebar - if the pattern matches something that should be fulfilled through a webhook, it will send it there.

But this still may not quite work as you expect. It doesn't look like the return from makeWebhookResult() is valid JSON, which will confuse all sorts of things in your code and Dialogflow's.

Update to explain your code a little bit

These lines in your code:

@app.route('/webhook', methods=['POST'])
def webhook():

very roughly say "I'm defining a function called webhook() . You should call this function when you get a POST request at the URL for this service that ends with the string /webhook ."

So if you were hosting this at heroku.example.com on port 59123 using HTTPS, then the full URL for the webhook would be https://heroku.example.com:59123/webhook , and this is the URL you would need to enter this into the Dialogflow fulfillment page.

Your logs indicate you are calling this without the /webhook part. In particular, this line

2018-02-12T14:23:15.577096+00:00 heroku[router]: at=info method=POST path="/" host=protected-citadel-58416.herokuapp.com request_id=b1b7e6d8-fd75-44e5-a2ab-1a73ea303f80 fwd="35.192.209.96" dyno=web.1 connect=0ms service=57ms status=404 bytes=380 protocol=https

Suggests that, although it is being called at your host using HTTPS and POST, the path it is trying to route to is "/" rather than "/webhook".