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64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
# -*- coding: utf-8 -*-
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"""验证 Edge 无头模式是不是把窗口宽度夹住了。
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怀疑：--window-size=420 实际渲染宽度比 420 大（Edge 有最小窗口宽度），
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截图再裁到 420 —— 于是看起来像"右边被截断"，
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其实页面本身没问题。
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做法：造一个宽度=100% 的蓝色条，看截图里蓝条有多宽。
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如果蓝条比截图宽，就说明渲染宽度 > 截图宽度（被裁了）。
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"""
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from __future__ import annotations
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import subprocess
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import sys
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import tempfile
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from pathlib import Path
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EDGE = next((p for p in (
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Path(r"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"),
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Path(r"C:\Program Files\Microsoft\Edge\Application\msedge.exe"))
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if p.is_file()), None)
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def main() -> int:
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if not EDGE:
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print(" 没找到 Edge")
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return 1
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from PIL import Image
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work = Path(tempfile.mkdtemp(prefix="edge_probe_"))
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page = work / "probe.html"
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page.write_text(
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'<html><body style="margin:0">'
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'<div style="width:100%;height:40px;background:#2f81f7"></div>'
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"</body></html>",
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encoding="utf-8")
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print(f" {'请求宽度':>8} {'截图宽度':>8} {'蓝条宽度':>8} {'判断':>14}")
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for width in (400, 420, 480, 500, 560, 600, 700, 800):
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shot = work / f"s{width}.png"
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subprocess.run(
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[str(EDGE), "--headless=new", "--disable-gpu", "--hide-scrollbars",
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f"--window-size={width},300", f"--screenshot={shot}",
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page.as_uri()],
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capture_output=True, timeout=60)
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if not shot.is_file():
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print(f" {width:>8} 截图失败")
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continue
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img = Image.open(shot).convert("RGB")
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row = [img.getpixel((x, 20)) for x in range(img.width)]
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blue = sum(1 for c in row if c[2] > 180 and c[0] < 100)
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verdict = "正常" if abs(blue - img.width) <= 2 else "被裁了!"
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print(f" {width:>8} {img.width:>8} {blue:>8} {verdict:>14}")
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print()
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print(" 结论：如果某些宽度显示[被裁了]，说明 Edge 无头版有最小窗口宽度，")
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print(" 截图比实际渲染窄 —— 那么窄屏截图看起来的截断是假象。")
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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