forked from GoogleCloudPlatform/getting-started-python
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathmain.py
More file actions
83 lines (67 loc) · 2.63 KB
/
Copy pathmain.py
File metadata and controls
83 lines (67 loc) · 2.63 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
# Copyright 2019 Google LLC All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" This web app shows translations that have been previously requested, and
provides a form to request a new translation.
"""
# [START getting_started_background_app_main]
import json
import os
from google.cloud import firestore
from google.cloud import pubsub
from flask import Flask, render_template, redirect, request
app = Flask(__name__)
# Get client objects to reuse over multiple invocations
db = firestore.Client()
publisher = pubsub.PublisherClient()
# Keep this list of supported languages up to date
ACCEPTABLE_LANGUAGES = ('de', 'en', 'es', 'fr', 'ja', 'sw')
# [END getting_started_background_app_main]
# [START getting_started_background_app_list]
@app.route('/', methods=['GET'])
def index():
""" The home page has a list of prior translations and a form to
ask for a new translation.
"""
doc_list = []
docs = db.collection('translations').stream()
for doc in docs:
doc_list.append(doc.to_dict())
return render_template('index.html', translations=doc_list)
# [END getting_started_background_app_list]
# [START getting_started_background_app_request]
@app.route('/request-translation', methods=['POST'])
def translate():
""" Handle a request to translate a string (form field 'v') to a given
language (form field 'lang'), by sending a PubSub message to a topic.
"""
source_string = request.form.get('v', '')
to_language = request.form.get('lang', '')
if source_string == '':
error_message = 'Empty value'
return error_message, 400
if to_language not in ACCEPTABLE_LANGUAGES:
error_message = 'Unsupported language: {}'.format(to_language)
return error_message, 400
message = {
'Original': source_string,
'Language': to_language,
'Translated': '',
'OriginalLanguage': '',
}
topic_name = 'projects/{}/topics/{}'.format(
os.getenv('GOOGLE_CLOUD_PROJECT'), 'translate'
)
publisher.publish(topic_name, json.dumps(message).encode('utf8'))
return redirect('/')
# [END getting_started_background_app_request]