109 lines
2.8 KiB
Python
109 lines
2.8 KiB
Python
from flask import Flask, request, Response, json
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from cat_detection import detect_cat
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from language_label_mapper import translate
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from validator import validate
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from flask_cors import CORS
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"""
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Flask Rest API application to cat recognition.
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If request is valid then send response with results of recognition.
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If key named 'Image' in body does not occurred then returns 400 (BAD REQUEST).
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Otherwise returns 200 with results of recognition.
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Format of response:
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{
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"lang": {users_lang},
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"results": {
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{filename}: {
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"isCat": {is_cat},
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"results": {
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"1": {result}
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"2": {result}
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"3": {result}
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...
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"10" {result}
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}
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},
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...
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},
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errors[
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{error_message},
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{error_message},
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...
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]
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}
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To see result format -> cat_detection.py
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"""
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# Define flask app
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app = Flask(__name__)
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app.secret_key = 'secret_key'
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CORS(app)
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# Available cats
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list_of_labels = [
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'lynx',
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'lion',
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'tiger',
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'cheetah',
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'leopard',
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'jaguar',
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'tabby',
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'Egyptian_cat',
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'cougar',
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'Persian_cat',
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'Siamese_cat',
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'snow_leopard',
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'tiger_cat'
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]
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# Available languages
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languages = {'pl', 'en'}
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@app.route('/api/v1/detect-cat', methods=['POST'])
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def upload_file():
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# Validate request
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error_messages = validate(request)
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# If any errors occurred, return 400 (BAD REQUEST)
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if len(error_messages) > 0:
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errors = json.dumps(
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{
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'errors': error_messages
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}
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)
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return Response(errors, status=400, mimetype='application/json')
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# Get files from request
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files = request.files.getlist('image')
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# Get user's language (Value in header 'Accept-Language'). Default value is English
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lang = request.accept_languages.best_match(languages, default='en')
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# Define JSON structure for results
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results = {
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'lang': lang,
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'results': {},
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'errors': []
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}
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# Generate results
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for file in files:
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predictions = detect_cat(file, list_of_labels)
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if predictions is not None:
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predictions, error_messages = translate(predictions, lang)
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results['results'][file.filename] = {
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'isCat': False if not predictions else True,
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**({'predictions': predictions} if predictions is not None else {})
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}
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if len(error_messages) > 1:
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results['errors'].append(error_messages)
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# Send response with 200 (Success)
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return Response(json.dumps(results), status=200, mimetype='application/json')
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if __name__ == '__main__':
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app.run(host='0.0.0.0')
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