Add support for user given conversion formats

Author: jochenklar

converter_app/app.py

@@ -14,6 +14,7 @@
 from .options import OPTIONS
 from .readers import registry
 from .utils import checkpw, human2bytes
+from .writers.jcamp import JcampWriter
 from .writers.jcampzip import JcampZipWriter
 
 
@@ -104,7 +105,17 @@ def retrieve_conversion():
                     converter.process()
 
                     if converter.tables:
-                        writer = JcampZipWriter(converter)
+                        conversion_format = request.form.get('format', 'jcampzip')
+
+                        if conversion_format == 'jcampzip':
+                            writer = JcampZipWriter(converter)
+                        elif conversion_format == 'jcamp':
+                            if len(converter.tables) == 1:
+                                writer = JcampWriter(converter)
+                            else:
+                                return jsonify({'error': 'Conversion to a single JCAMP file is not supported for this file.'}), 400
+                        else:
+                            return jsonify({'error': 'Conversion format is not supported.'}), 400
                     else:
                         return jsonify({'error': 'No tables could be converted.'}), 400