def get_json_for_image(barcode: str, image_name: str) -> \
Optional[JSONType]:
url = generate_json_ocr_url(barcode, image_name)
r = http_session.get(url)
if r.status_code == 404:
return None
return r.json()
def download_dataset(output_path: os.PathLike) -> str:
r = http_session.get(settings.JSONL_DATASET_URL, stream=True)
current_etag = r.headers.get("ETag", "").strip("'\"")
logger.info("Dataset has changed, downloading file")
logger.debug("Saving temporary file in {}".format(output_path))
with open(output_path, "wb") as f:
shutil.copyfileobj(r.raw, f)
return current_etag
def fetch_taxonomy(url: str, fallback_path: str, offline=False) \
-> Optional[Taxonomy]:
if offline:
return Taxonomy.from_json(fallback_path)
try:
r = http_session.get(url, timeout=5)
data = r.json()
except Exception:
if fallback_path:
return Taxonomy.from_json(fallback_path)
else:
return None
return Taxonomy.from_dict(data)
def save_image(directory: pathlib.Path,
image_meta: JSONType,
barcode: str,
override: bool = False):
image_name = image_meta['imgid']
image_full_name = "{}_{}.jpg".format(barcode, image_name)
image_path = directory / image_full_name
if image_path.exists() and not override:
return
image_url = generate_image_url(barcode, image_name)
logger.info("Downloading image {}".format(image_url))
r = http_session.get(image_url)
with open(str(image_path), 'wb') as fd:
logger.info("Saving image in {}".format(image_path))
for chunk in r.iter_content(chunk_size=128):
fd.write(chunk)
def extract_ocr_insights(ocr_url: str,
insight_types: Iterable[str]) -> JSONType:
r = http_session.get(ocr_url)
r.raise_for_status()
ocr_data: Dict = r.json()
ocr_result = ocr.OCRResult.from_json(ocr_data)
if ocr_result is None:
logger.info("Error during OCR extraction: {}".format(ocr_url))
return {}
results = {}
for insight_type in insight_types:
insights = ocr.extract_insights(ocr_result, insight_type)
if insights:
results[insight_type] = insights
return results
def fetch_images_for_ean(ean: str):
url = "https://world.openfoodfacts.org/api/v0/product/" \
"{}.json?fields=images".format(ean)
images = http_session.get(url).json()
return images
