Stop polling. Use SocketIO!

app/__init__.py

@@ -27,9 +27,6 @@ def create_app(config_name):
     scheduler.start()
     socketio.init_app(app)
 
-    from .api import api as api_blueprint
-    app.register_blueprint(api_blueprint, url_prefix='/api')
-
     from .auth import auth as auth_blueprint
     app.register_blueprint(auth_blueprint, url_prefix='/auth')
 

app/api/__init__.py

@@ -1,5 +0,0 @@
-from flask import Blueprint
-
-api = Blueprint('api', __name__)
-
-from . import views

app/api/views.py

@@ -1,103 +0,0 @@
-from flask import abort, jsonify, make_response, request
-from flask_login import current_user, login_required
-from . import api
-from ..decorators import admin_required
-from ..models import Corpus, Job, User
-
-
-@api.route('/v1.0/admin/corpora')
-@login_required
-@admin_required
-def admin_corpora():
-    user_id = request.args.get('user_id', default=str(current_user.id))
-    if user_id == '*':
-        corpora = Corpus.query.all()
-    else:
-        user = User.query.filter_by(id=user_id).first()
-        if user:
-            corpora = user.corpora.all()
-        else:
-            return abort(404)
-    jsonifyable_corpora = []
-    for corpus in corpora:
-        jsonifyable_corpora.append(corpus.to_dict())
-    return jsonify(jsonifyable_corpora)
-
-
-@api.route('/v1.0/admin/corpora/<int:corpus_id>')
-@login_required
-@admin_required
-def admin_coprus(corpus_id):
-    corpus = Corpus.query.filter_by(id=corpus_id).first()
-    if corpus:
-        return jsonify(corpus.to_dict())
-    else:
-        return abort(404)
-
-
-@api.route('/v1.0/admin/jobs')
-@login_required
-@admin_required
-def admin_jobs():
-    user_id = request.args.get('user_id', default=str(current_user.id))
-    if user_id == '*':
-        jobs = Job.query.all()
-    else:
-        user = User.query.filter_by(id=user_id).first()
-        if user:
-            jobs = user.jobs.all()
-        else:
-            return abort(404)
-    jsonifyable_jobs = []
-    for job in jobs:
-        jsonifyable_jobs.append(job.to_dict())
-    return jsonify(jsonifyable_jobs)
-
-
-@api.route('/v1.0/admin/jobs/<int:job_id>')
-@login_required
-@admin_required
-def admin_job(job_id):
-    job = Job.query.filter_by(id=job_id).first()
-    if job:
-        return jsonify(job.to_dict())
-    else:
-        return abort(404)
-
-
-@api.route('/v1.0/corpora')
-@login_required
-def corpora():
-    jsonifyable_corpora = []
-    for corpus in current_user.corpora.all():
-        jsonifyable_corpora.append(corpus.to_dict())
-    return jsonify(jsonifyable_corpora)
-
-
-@api.route('/v1.0/corpora/<int:corpus_id>')
-@login_required
-def corpus(corpus_id):
-    corpus = current_user.corpora.filter_by(id=corpus_id).first()
-    if corpus:
-        return jsonify(corpus.to_dict())
-    else:
-        return abort(404)
-
-
-@api.route('/v1.0/jobs')
-@login_required
-def jobs():
-    jsonifyable_jobs = []
-    for job in current_user.jobs.all():
-        jsonifyable_jobs.append(job.to_dict())
-    return jsonify(jsonifyable_jobs)
-
-
-@api.route('/v1.0/jobs/<int:job_id>')
-@login_required
-def job(job_id):
-    job = current_user.jobs.filter_by(id=job_id).first()
-    if job:
-        return jsonify(job.to_dict())
-    else:
-        return abort(404)

app/main/views.py

@@ -1,10 +1,12 @@
 from flask import (abort, current_app, flash, redirect, request,
                    render_template, url_for, send_from_directory)
 from flask_login import current_user, login_required
+from flask_socketio import emit
 from . import main
 from .forms import CreateCorpusForm
 from .. import db, socketio
 from ..models import Corpus
+import json
 import os
 
 
@@ -19,6 +21,21 @@ def handle_message(message):
     print('received message: ' + str(message))
 
 
+@socketio.on('connect')
+@login_required
+def connect():
+    corpora = []
+    jobs = []
+
+    for corpus in current_user.corpora:
+        corpora.append(corpus.to_dict())
+    for job in current_user.jobs:
+        jobs.append(job.to_dict())
+
+    emit('corpora', {'data': json.dumps(corpora)})
+    emit('jobs', {'data': json.dumps(jobs)})
+
+
 @main.route('/corpora/<int:corpus_id>')
 @login_required
 def corpus(corpus_id):

app/models.py

@@ -288,7 +288,7 @@ class Corpus(db.Model):
 
     def to_dict(self):
         return {'id': self.id,
-                'creation_date': self.creation_date,
+                'creation_date': self.creation_date.timestamp(),
                 'description': self.description,
                 'title': self.title,
                 'user_id': self.user_id}

app/static/js/CorpusList.js

@@ -1,10 +1,12 @@
 class CorpusList extends List {
-  constructor(idOrElement, options, live=false) {
+  constructor(idOrElement, options) {
     super(idOrElement, options);
-    this.createCorpusElements(corpora);
-    if (live) {
-      subscribers.corpora.push(this);
+    corporaSubscribers.push(this);
   }
+
+
+  init() {
+    this.createCorpusElements(corpora);
   }
 
 
@@ -48,7 +50,7 @@ class CorpusList extends List {
     List.updatePagination(this);
   }
 
-
+/*
   corporaUpdateHandler(delta) {
     var corpusElement, key, listItem;
 
@@ -76,4 +78,5 @@ class CorpusList extends List {
       }
     }
   }
+*/
 }

app/static/js/JobList.js

@@ -1,10 +1,12 @@
 class JobList extends List {
-  constructor(idOrElement, options, live=false) {
+  constructor(idOrElement, options) {
     super(idOrElement, options);
-    this.createJobElements(jobs);
-    if (live) {
-      subscribers.jobs.push(this);
+    jobsSubscribers.push(this);
   }
+
+
+  init() {
+    this.createJobElements(jobs);
   }
 
 
@@ -51,7 +53,7 @@ class JobList extends List {
     List.updatePagination(this);
   }
 
-
+/*
   jobsUpdateHandler(delta) {
     var jobElement, jobStatusElement, key, listItem;
 
@@ -85,6 +87,7 @@ class JobList extends List {
       }
     }
   }
+*/
 }
 
 JobList.SERVICE_COLORS = {"nlp": "blue",

app/static/js/polls.js

@@ -1,58 +0,0 @@
-var subscribers = {"corpora": [], "jobs": []};
-
-
-function getCorpora() {
-  fetch("/api/v1.0/corpora")
-  .then(function(response) {
-    if (response.status >= 200 && response.status < 300) {
-      return Promise.resolve(response);
-    } else {
-      return Promise.reject(new Error(response.statusText));
-    }
-  })
-  .then(function(response) {
-      return response.json();
-  })
-  .then(function(data) {
-    if (JSON.stringify(corpora) != JSON.stringify(data)) {
-      corpora = data;
-      for (subscriber of subscribers.corpora) {
-        subscriber.corporaUpdateHandler();
-      }
-    }
-  })
-  .catch(function(error) {
-    console.log('Request failed', error);
-  });
-}
-
-
-function getJobs() {
-  fetch("/api/v1.0/jobs")
-  .then(function(response) {
-    if (response.status >= 200 && response.status < 300) {
-      return Promise.resolve(response);
-    } else {
-      return Promise.reject(new Error(response.statusText));
-    }
-  })
-  .then(function(response) {
-      return response.json();
-  })
-  .then(function(json) {
-    var delta = jsondiffpatch.diff(jobs, json);
-    if (delta) {
-      jobs = json;
-      for (subscriber of subscribers.jobs) {
-        subscriber.jobsUpdateHandler(delta);
-      }
-    }
-  })
-  .catch(function(error) {
-    console.log('Request failed', error);
-  });
-}
-
-
-setInterval(getCorpora, 5000);
-setInterval(getJobs, 5000);

app/templates/base.html.j2

@@ -11,33 +11,31 @@
     <link type="text/css" rel="stylesheet" href="{{ url_for('static', filename='fonts/material-icons/material-icons.css') }}">
     <link type="text/css" rel="stylesheet" href="{{ url_for('static', filename='css/materialize.min.css') }}" media="screen,projection"/>
     <link type="text/css" rel="stylesheet" href="{{ url_for('static', filename='css/opaque.css') }}" media="screen,projection"/>
-    {% if current_user.is_authenticated %}
-    <script>
-      var corpora = [
-        {% for corpus in current_user.corpora.all() %}
-        {{ corpus.to_dict()|tojson }},
-        {% endfor %}
-      ];
-      var jobs = [
-        {% for job in current_user.jobs.all() %}
-        {{ job.to_dict()|tojson }},
-        {% endfor %}
-      ];
-    </script>
-    <script src="{{ url_for('static', filename='js/jsondiffpatch.umd.js') }}"></script>
-    <script src="{{ url_for('static', filename='js/polls.js') }}"></script>
-    {% endif %}
     <script src="{{ url_for('static', filename='js/socket.io.js') }}"></script>
-    <script type="text/javascript" charset="utf-8">
-        var socket = io();
-        socket.on('connect', function() {
-            socket.emit('my event', {data: 'I\'m connected!'});
-        });
-    </script>
-    <script src="{{ url_for('static', filename='js/list.min.js') }}"></script>
-    <script src="{{ url_for('static', filename='js/utils.js') }}"></script>
+    <script src="{{ url_for('static', filename='js/list.js') }}"></script>
+    <script src="{{ url_for('static', filename='js/list.utils.js') }}"></script>
     <script src="{{ url_for('static', filename='js/CorpusList.js') }}"></script>
     <script src="{{ url_for('static', filename='js/JobList.js') }}"></script>
+    <script>
+      var corpora;
+      var corporaSubscribers = [];
+      var jobs;
+      var jobsSubscribers = [];
+    </script>
+    <script>
+      var socket = io();
+
+      socket.on('corpora', function(msg) {
+        corpora = JSON.parse(msg.data);
+        for (subscriber of corporaSubscribers) {subscriber.init();}
+      });
+
+
+      socket.on('jobs', function(msg) {
+        jobs = JSON.parse(msg.data);
+        for (subscriber of jobsSubscribers) {subscriber.init();}
+      });
+    </script>
     <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
   </head>
   <body>

app/templates/main/dashboard.html.j2

@@ -35,7 +35,7 @@
                            page: 4,
                            pagination: true,
                            valueNames: ["description", "title", {data: ["id"]}]}
-  var corpusList = new CorpusList("corpus-list", corpusListOptions, true);
+  var corpusList = new CorpusList("corpus-list", corpusListOptions);
   corpusList.on("filterComplete", List.updatePagination);
   corpusList.on("searchComplete", List.updatePagination);
 </script>
@@ -78,7 +78,7 @@
                     page: 4,
                     pagination: true,
                     valueNames: ["description", "title", {data: ["id"]}]}
-  var jobList = new JobList("job-list", jobListOptions, true);
+  var jobList = new JobList("job-list", jobListOptions);
   jobList.on("filterComplete", List.updatePagination);
   jobList.on("searchComplete", List.updatePagination);
 </script>
@@ -135,5 +135,4 @@
   <li><a href="{{ url_for('services.nlp') }}"><i class="material-icons">format_textdirection_l_to_r</i>NLP</a></li>
   <li><a href="{{ url_for('services.ocr') }}"><i class="material-icons">find_in_page</i>OCR</a></li>
 </ul>
-
 {% endblock %}