| import io |
| import os |
| from urllib.parse import urlparse |
| from PIL import Image |
|
|
|
|
| def fsize(file): |
| if isinstance(file, io.BytesIO): |
| return file.getbuffer().nbytes |
| elif isinstance(file, str): |
| return os.path.getsize(file) |
| elif hasattr(file, "seek") and hasattr(file, "tell"): |
| pos = file.tell() |
| file.seek(0, os.SEEK_END) |
| size = file.tell() |
| file.seek(pos) |
| return size |
| else: |
| raise TypeError("Unsupported type") |
|
|
|
|
| def compress_imgfile(file, max_size): |
| if fsize(file) <= max_size: |
| return file |
| file.seek(0) |
| img = Image.open(file) |
| rgb_image = img.convert("RGB") |
| quality = 95 |
| while True: |
| out_buf = io.BytesIO() |
| rgb_image.save(out_buf, "JPEG", quality=quality) |
| if fsize(out_buf) <= max_size: |
| return out_buf |
| quality -= 5 |
|
|
|
|
| def split_string_by_utf8_length(string, max_length, max_split=0): |
| encoded = string.encode("utf-8") |
| start, end = 0, 0 |
| result = [] |
| while end < len(encoded): |
| if max_split > 0 and len(result) >= max_split: |
| result.append(encoded[start:].decode("utf-8")) |
| break |
| end = min(start + max_length, len(encoded)) |
| |
| while end < len(encoded) and (encoded[end] & 0b11000000) == 0b10000000: |
| end -= 1 |
| result.append(encoded[start:end].decode("utf-8")) |
| start = end |
| return result |
|
|
|
|
| def get_path_suffix(path): |
| path = urlparse(path).path |
| return os.path.splitext(path)[-1].lstrip('.') |
|
|
