84 lines
2.0 KiB
Python
84 lines
2.0 KiB
Python
import os
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import re
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import base64
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from appPublic.uniqueID import getID
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MIME_EXT = {
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# 图片
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"image/jpeg": "jpg",
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"image/png": "png",
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"image/gif": "gif",
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"image/webp": "webp",
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"image/bmp": "bmp",
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"image/svg+xml": "svg",
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"image/x-icon": "ico",
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"image/tiff": "tiff",
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# 音频
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"audio/mpeg": "mp3",
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"audio/wav": "wav",
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"audio/ogg": "ogg",
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"audio/webm": "weba",
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"audio/aac": "aac",
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"audio/flac": "flac",
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"audio/mp4": "m4a",
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"audio/3gpp": "3gp",
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# 视频
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"video/mp4": "mp4",
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"video/webm": "webm",
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"video/ogg": "ogv",
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"video/x-msvideo": "avi",
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"video/quicktime": "mov",
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"video/x-matroska": "mkv",
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"video/3gpp": "3gp",
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"video/x-flv": "flv",
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}
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import base64
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def hex2base64(hex_str, typ):
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"""
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将十六进制字符串转换为 Base64 编码字符串。
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:param hex_str: 输入的十六进制字符串（可选带 0x 前缀）
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:return: Base64 编码的字符串
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"""
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# 移除 0x 前缀（如果存在）
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if hex_str.startswith(('0x', '0X')):
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hex_str = hex_str[2:]
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# 将 Hex 字符串转换为字节数据
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bytes_data = bytes.fromhex(hex_str)
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# 编码为 Base64 并转为字符串
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base64_str = base64.b64encode(bytes_data).decode('utf-8')
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for k,v in MIME_EXT.items():
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if v == typ:
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base64_str = 'data:' + k + ';base64,' + base64_str
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return base64_str
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def getFilenameFromBase64(base64String):
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match = re.match(r"data:(.*?);base64,(.*)", base64String)
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if not match:
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raise ValueError("不是合法的 base64 Data URL")
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mime_type, b64_data = match.groups()
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ext = MIME_EXT.get(mime_type, mime_type.split("/")[-1])
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name = getID()
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fname = f'{name}.{ext}'
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return fname
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def base64_to_file(base64_string, output_path):
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# Remove data URL prefix if present (e.g., "data:image/png;base64,")
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if ',' in base64_string:
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header, base64_data = base64_string.split(',', 1)
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else:
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base64_data = base64_string
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# Decode Base64 string
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binary_data = base64.b64decode(base64_data)
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# Write binary data to file
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with open(output_path, 'wb') as file:
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file.write(binary_data)
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