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import io
import os
import re
import time
import numpy as np
import logging
import urllib.request
from flask import Blueprint, request, jsonify
from PIL import Image
from app.models.sql_factory import search_by_phash, add_phash
from app.utils.im_utils import compute_phash_int
from app.utils.file_utils import sha256_stream
sanitize_re = re.compile('[\W]+')
valid_exts = ['.gif', '.jpg', '.jpeg', '.png']
MATCH_THRESHOLD = 20
MATCH_LIMIT = 10
SIMILAR_THRESHOLD = 20
SIMILAR_LIMIT = 10
api = Blueprint('api', __name__)
@api.route('/')
def index():
"""
API status test endpoint
"""
return jsonify({ 'status': 'ok' })
def get_params(default_threshold=MATCH_THRESHOLD, default_limit=MATCH_LIMIT):
try:
threshold = int(request.form.get('threshold') or default_threshold)
limit = int(request.form.get('limit') or default_limit)
except:
return jsonify({
'success': False,
'match': False,
'error': 'param_error'
})
if 'q' in request.files:
file = request.files['q']
fn = file.filename
if fn.endswith('blob'): # FIX PNG IMAGES?
logging.debug('received a blob, assuming JPEG')
fn = 'filename.jpg'
basename, ext = os.path.splitext(fn)
if ext.lower() not in valid_exts:
return jsonify({
'success': False,
'match': False,
'error': 'not_an_image'
})
raw = None
im = Image.open(file.stream).convert('RGB')
else:
url = request.form.get('url')
if not url:
return jsonify({
'success': False,
'match': False,
'error': 'no_image'
})
basename, ext = os.path.splitext(url)
if ext.lower() not in valid_exts:
return jsonify({
'success': False,
'match': False,
'error': 'not_an_image'
})
remote_request = urllib.request.Request(url)
remote_response = urllib.request.urlopen(remote_request)
raw = remote_response.read()
im = Image.open(io.BytesIO(raw)).convert('RGB')
@api.route('/v1/match', methods=['POST'])
def match():
"""
Search by uploading an image
"""
start = time.time()
threshold, limit, raw, im = get_params()
phash = compute_phash_int(im)
ext = ext[1:].lower()
results = search_by_phash(phash=phash, threshold=threshold, limit=limit)
if len(results) == 0:
if url:
# hash = sha256_stream(file)
hash = sha256_stream(io.BytesIO(raw))
add_phash(sha256=hash, phash=phash, ext=ext, url=url)
match = False
else:
match = True
logging.debug('query took {0:.2g} s.'.format(time.time() - start))
return jsonify({
'success': True,
'match': match,
'results': results,
'timing': time.time() - start,
})
@api.route('/v1/similar', methods=['POST'])
def similar():
"""
Search by uploading an image
"""
start = time.time()
threshold, limit, raw, im = get_params(default_threshold=SIMILARITY_THRESHOLD, default_limit=SIMILARITY_LIMIT)
phash = compute_phash_int(im)
ext = ext[1:].lower()
results = search_by_phash(phash=phash, threshold=threshold, limit=limit)
if len(results) == 0:
match = False
else:
match = True
logging.debug('query took {0:.2g} s.'.format(time.time() - start))
return jsonify({
'success': True,
'match': match,
'results': results,
'timing': time.time() - start,
})
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