Simple server

Procfile

+web: gunicorn app:app --log-file=-

app.py

+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#    Copyright 2014 J. Fernando Sánchez Rada - Grupo de Sistemas Inteligentes
+#                                                       DIT, UPM
+#
+#    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.
+'''
+Simple Sentiment Analysis server for EUROSENTIMENT
+'''
+from flask import Flask
+from random import random
+from nif_server import *
+import config
+
+app = Flask(__name__)
+
+def hard_analysis(params):
+    response = basic_analysis(params)
+    response["analysis"][0]["marl:algorithm"] = "SimpleAlgorithm"
+    for i in response["entries"]:
+        polValue = random()
+        if polValue > 0.5:
+            pol = "marl:Positive"
+        elif polValue == 0.5:
+            pol = "marl:Neutral"
+        else:
+            pol = "marl:Negative"
+        i["opinions"] = [{"marl:polarityValue": polValue,
+                          "marl:hasPolarity": pol
+
+                          }]
+    return response
+
+app.analyse = hard_analysis
+app.register_blueprint(nif_server)
+
+if __name__ == '__main__':
+    app.debug = config.DEBUG
+    app.run()

config.py

+import os
+
+SERVER_PORT = os.environ.get("SERVER_PORT", 5000)
+DEBUG = os.environ.get("DEBUG", True)

nif_server.py

+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#    Copyright 2014 J. Fernando Sánchez Rada - Grupo de Sistemas Inteligentes
+#                                                       DIT, UPM
+#
+#    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.
+'''
+Simple Sentiment Analysis server for EUROSENTIMENT
+'''
+from flask import Blueprint, render_template, request, jsonify, current_app
+import config
+import json
+
+nif_server = Blueprint("NIF Sentiment Analysis Server", __name__)
+
+PARAMS = {"input": {"aliases": ["i", "input"],
+                    "help": "Input text"
+                    },
+          "informat": {"aliases": ["f", "informat"],
+                       "default": "text",
+                       "options": ["turtle", "text"],
+                       },
+          "intype": {"aliases": ["intype", "t"],
+                     "default": "direct",
+                     "options": ["direct", "url", "file"],
+                     },
+          "outformat": {"aliases": ["outformat", "o"],
+                        "default": "json-ld",
+                        "options": ["json-ld"],
+                        },
+          "language": {"aliases": ["language", "l"],
+                        "default": None,
+                        "options": ["es", "en"],
+                        },
+          "urischeme": {"aliases": ["urischeme", "u"],
+                        "default": "RFC5147String",
+                        "options": "RFC5147String"
+                        },
+          }
+
+
+def get_params(req):
+    indict = None
+    if req.method == 'POST':
+        indict = req.form
+    if req.method == 'GET':
+        indict = req.args
+    else:
+        raise ValueError("Invalid data")
+
+    outdict = {}
+    missingParams = []
+    for param, options in PARAMS.iteritems():
+        for alias in options["aliases"]:
+            if alias in indict:
+                outdict[param] = indict[alias]
+        if param not in outdict:
+            if "default" in options:
+                if options["default"]:
+                    outdict[param] = options["default"]
+            else:
+                missingParams.append(param)
+    if missingParams:
+        message = {"status": "failed", "message": "Missing parameters"}
+        message["parameters"] = {param:PARAMS[param] for param in missingParams}
+        raise ValueError(json.dumps(message))
+    return outdict
+
+def basic_analysis(params):
+    response = {"@context": "http://demos.gsi.dit.upm.es/eurosentiment/static/context.jsonld",
+                "analysis": [{
+                    "@type": "marl:SentimentAnalysis"
+                }],
+                "entries": []
+                }
+    if "language" in params:
+        response["language"] = params["language"]
+    for sentence in params["input"].split("."):
+        response["entries"].append({
+            "nif:isString": sentence
+        })
+    return response
+
+@nif_server.route('/', methods=['POST', 'GET'])
+def home(entries=None):
+    try:
+        params = get_params(request)
+    except ValueError as ex:
+        return ex.message
+    response = current_app.analyse(params)
+    return jsonify(response)
+
+if __name__ == '__main__':
+    from flask import Flask
+    app = Flask(__name__)
+    app.register_blueprint(nif_server)
+    app.debug = config.DEBUG
+    app.run()

requirements.txt

+Flask==0.10.1
+gunicorn==19.0.0