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fix: use spooled temp file to reduce memory usage

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Signed-off-by: Frost Ming <me@frostming.com>
This commit is contained in:
Frost Ming 2023-12-12 12:07:48 +08:00
parent 3007ed67a9
commit 23484f5b7c
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GPG Key ID: 5BFA9CB4DDA943BF
1 changed files with 14 additions and 12 deletions
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26
hy_tg.py
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@ -1,10 +1,10 @@
import argparse
import gc
import io
import random
import shutil
import subprocess
import traceback
from tempfile import SpooledTemporaryFile
import numpy as np
import PIL
@ -18,6 +18,7 @@ from telebot import TeleBot # type: ignore
from telebot.types import Message # type: ignore
PIL.Image.MAX_IMAGE_PIXELS = 933120000
MAX_IN_MEMORY = 10 * 1024 * 1024 # 10MiB
class Plot(PrettyPlot):
@ -52,16 +53,15 @@ class Plot(PrettyPlot):
def sizeof_image(image):
with io.BytesIO() as buff:
image.save(buff, format="JPEG", quality=95)
return buff.tell()
with SpooledTemporaryFile(max_size=MAX_IN_MEMORY) as f:
image.save(f, format="JPEG", quality=95)
return f.tell()
def compress_image(input_image, target_size):
quality = 95
factor = 1.0
input_image.seek(0)
output = io.BytesIO()
output = SpooledTemporaryFile(max_size=MAX_IN_MEMORY)
with Image.open(input_image) as img:
while sizeof_image(img) > target_size:
factor -= 0.05
@ -79,12 +79,13 @@ def draw_pretty_map(location, style):
aoi = get_aoi(address=location, radius=1100, rectangular=True)
df = get_osm_geometries(aoi=aoi)
fig = Plot(df=df, aoi_bounds=aoi.bounds, draw_settings=STYLES[style]).plot_all()
buffer = io.BytesIO()
fig.savefig(buffer, format="jpeg")
return compress_image(
buffer,
10 * 1024 * 1024, # telegram tog need png less than 10MB
)
with SpooledTemporaryFile(max_size=MAX_IN_MEMORY) as buffer:
fig.savefig(buffer, format="jpeg")
buffer.seek(0)
return compress_image(
buffer,
10 * 1024 * 1024, # telegram tog need png less than 10MB
)
def main():
@ -158,6 +159,7 @@ def main():
bot.send_photo(
message.chat.id, out_image, reply_to_message_id=message.message_id
)
out_image.close()
except Exception:
traceback.print_exc()