WIP : call jar parser

src/app/app.py

 from flask import Flask
 from flask import request
 from flask import render_template
+import tempfile
+import subprocess
+import os
+
 app = Flask(__name__)
 
 
@@ -13,13 +17,38 @@ def main():
 def unl2rdf():
     if request.method == 'POST':
         unl = request.form['unl']
-        rdf = convertUnl2Rdf(unl)
+        # Validate formats list
+        formats = list(set(['rdf', 'dot']) & set(request.form.getlist('outputs')))
+        output = convertUnl(unl, formats)
     else:
         unl = None
-        rdf = None
-    return render_template('unl2rdf.html', unl=unl, rdf=rdf)
+        output = None
+    return render_template('unl2rdf.html', unl=unl, output=output)
+
+
+def convertUnl(unl, outputs):
+    with tempfile.NamedTemporaryFile() as temp:
+        out_name = temp.name
+
+    with tempfile.NamedTemporaryFile() as in_file:
+        in_file.write(unl)
+        unl2rdf_path = "/opt/UnlParser-1.0-SNAPSHOT.jar"
+        cmd = ['java', '-jar', unl2rdf_path, '--input-file', in_file.name,
+               '--output-filename', out_name, '--output-type', outputs]
+        subprocess.run(cmd)
+
+    res = {}
+    if 'rdf' in outputs:
+        fname = '{}.rdf'.format(out_name)
+        with open('{}.rdf'.format(out_name), 'r') as f:
+            res['rdf'] = f.read()
+        os.remove(fname)
 
+    if 'dot' in outputs:
+        fname = '{}.dot'.format(out_name)
+        cmd = ['dot', '-Tsvg', fname]
+        with subprocess.Popen(cmd, stdout=subprocess.PIPE) as proc:
+            res['dot'] = proc.stdout.read()
+        os.remove(fname)
 
-def convertUnl2Rdf(unl):
-    # TODO handle text here, do not call bash command or sanitize input first
-    return "Please implement me so I can convert '{}' to RDF".format(unl)
+    return res

src/app/templates/unl2rdf.html

@@ -2,26 +2,39 @@
 {% block title %}UNL 2 RDF demo{% endblock %}
 {% block content %}
 {% if not unl %}
-<h1>Enter some UNL here I will convert it to RDF for you</h1>
 <div class="form-group">
     <form action="{{request.path}}" method="POST">
+        <h2>Enter some UNL here I will convert it for you</h2>
         <textarea class="form-control" name="unl" cols="80" rows="10" style="width: 300px; height: 150px;"></textarea>
+        <h2>Tell me which output(s) you want</h2>
+        <ul>
+            <li><label><input type="checkbox" name="outputs" value="rdf" checked>RDF</label></li>
+            <li><label><input type="checkbox" name="outputs" value="dot" checked>Graph (dot)</label></li>
+        </ul>
         <button class="btn btn-primary" type="submit">Submit</button>
     </form>
 </div>
 {% else %}
-<h2> UNL </h2>
-<pre>
-    <code>
-        {{ unl }}
-    </code>
-</pre>
-<h2> RDF </h2>
-<pre>
-    <code>
-        {{ rdf }}
-    </code>
-</pre>
+    <h2> UNL </h2>
+    <pre>
+        <code>
+            {{ unl }}
+        </code>
+    </pre>
+
+    {% if output['dot'] %}
+        <h2> Unl graph </h2>
+        {{ output['dot'] }}
+    {% endif %}
+
+    {% if output['rdf'] %}
+        <h2> RDF </h2>
+        <pre>
+            <code>
+                {{ output['rdf'] }}
+            </code>
+        </pre>
+    {% endif %}
 
 {% endif %}
 {% endblock %}