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import requests | ||
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def generate_caption(image_path, onnx, blip): | ||
json = { | ||
"image_path": image_path, | ||
"onnx": onnx, | ||
"blip": blip, | ||
} | ||
caption_response = requests.post( | ||
"http://localhost:8007/generate-caption", json=json | ||
).json() | ||
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return caption_response["caption"] | ||
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def unload_model(): | ||
requests.get("http://localhost:8007/unload-model") | ||
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def export_onnx(encoder_path, decoder_path): | ||
json = { | ||
"encoder_path": encoder_path, | ||
"decoder_path": decoder_path, | ||
} | ||
requests.get("http://localhost:8007/export-onnx", json=json) |
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import threading | ||
import time | ||
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import gevent | ||
from flask import Flask, request | ||
from gevent.pywsgi import WSGIServer | ||
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from api.im2txt.sample import Im2txt | ||
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app = Flask(__name__) | ||
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im2txt_instance = None | ||
last_request_time = time.time() | ||
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def log(message): | ||
print("image_captioning: {}".format(message)) | ||
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@app.route("/generate-caption", methods=["POST"]) | ||
def generate_caption(): | ||
global last_request_time | ||
# Update last request time | ||
last_request_time = time.time() | ||
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try: | ||
data = request.get_json() | ||
image_path = data["image_path"] | ||
onnx = data["onnx"] | ||
blip = data["blip"] | ||
except Exception as e: | ||
print(str(e)) | ||
return "", 400 | ||
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global im2txt_instance | ||
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if im2txt_instance is None: | ||
im2txt_instance = Im2txt(blip=blip) | ||
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return { | ||
"caption": im2txt_instance.generate_caption(image_path=image_path, onnx=onnx) | ||
}, 201 | ||
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@app.route("/unload-model", methods=["GET"]) | ||
def unload_model(): | ||
global im2txt_instance | ||
im2txt_instance.unload_models() | ||
im2txt_instance = None | ||
return "", 200 | ||
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@app.route("/export-onnx", methods=["GET"]) | ||
def export_onnx(): | ||
global im2txt_instance | ||
if im2txt_instance is None: | ||
im2txt_instance = Im2txt() | ||
data = request.get_json() | ||
encoder_path = data["encoder_path"] | ||
decoder_path = data["decoder_path"] | ||
im2txt_instance.export_onnx( | ||
encoder_output_path=encoder_path, decoder_output_path=decoder_path | ||
) | ||
return "", 200 | ||
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def check_inactivity(): | ||
global last_request_time | ||
idle_threshold = 30 | ||
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while True: | ||
time.sleep(1) | ||
idle_time = time.time() - last_request_time | ||
if idle_time > idle_threshold and im2txt_instance is not None: | ||
print("Unloading model due to inactivity") | ||
unload_model() | ||
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threading.Thread(target=check_inactivity).start() | ||
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if __name__ == "__main__": | ||
log("service starting") | ||
server = WSGIServer(("0.0.0.0", 8007), app) | ||
server_thread = gevent.spawn(server.serve_forever) | ||
gevent.joinall([server_thread]) |