我正在寻找可执行文件在Google App Engine（标准环境）中的位置。
原因是我试图使用pyppeteer进行某些工作，但是pyppeteer总是将Chrome下载到自定义文件夹中，然后退出。
我看到puppeteer在GAE上运行，因此我希望我能说服pyppeteer也可以运行。
以下是Google App Engine日志：
2019-07-23 17:39:33 default[test] [W:pyppeteer.chromium_downloader] start chromium download.
2019-07-23 17:39:33 default[test] Download may take a few minutes.
2019-07-23 17:39:33 default[test]
2019-07-23 17:39:34 default[test] 0%| | 0/106826418 [00:00<?, ?it/s]
2019-07-23 17:39:34 default[test] 2%|▏ | 1925120/106826418 [00:00<00:07, 13602613.39it/s]
2019-07-23 17:39:34 default[test] 4%|▍ | 4392960/106826418 [00:00<00:06, 15716861.03it/s]
2019-07-23 17:39:34 default[test] 6%|▌ | 6256640/106826418 [00:00<00:06, 16489218.92it/s]
2019-07-23 17:39:34 default[test] 8%|▊ | 8407040/106826418 [00:00<00:05, 17728112.85it/s]
2019-07-23 17:39:34 default[test] 11%|█ | 11683840/106826418 [00:00<00:04, 20557603.00it/s]
2019-07-23 17:39:34 default[test] 13%|█▎ | 14356480/106826418 [00:00<00:04, 22086461.51it/s]
2019-07-23 17:39:34 default[test] 16%|█▌ | 17008640/106826418 [00:00<00:03, 23246105.82it/s]
2019-07-23 17:39:34 default[test] 18%|█▊ | 19374080/106826418 [00:00<00:03, 23225442.25it/s]
2019-07-23 17:39:35 default[test] 20%|██ | 21729280/106826418 [00:00<00:03, 23203081.94it/s]
2019-07-23 17:39:35 default[test] 24%|██▍ | 25681920/106826418 [00:01<00:03, 26483368.08it/s]
2019-07-23 17:39:35 default[test] 27%|██▋ | 28508160/106826418 [00:01<00:02, 26759076.64it/s]
2019-07-23 17:39:35 default[test] 29%|██▉ | 31313920/106826418 [00:01<00:02, 26995282.49it/s]
2019-07-23 17:39:35 default[test] 32%|███▏ | 34375680/106826418 [00:01<00:02, 27987817.70it/s]
2019-07-23 17:39:35 default[test] 35%|███▍ | 37253120/106826418 [00:01<00:02, 28005026.46it/s]
2019-07-23 17:39:35 default[test] 38%|███▊ | 40212480/106826418 [00:01<00:02, 28458335.10it/s]
2019-07-23 17:39:35 default[test] 40%|████ | 43100160/106826418 [00:01<00:02, 28379615.37it/s]
2019-07-23 17:39:35 default[test] 43%|████▎ | 45967360/106826418 [00:01<00:02, 22218027.73it/s]
2019-07-23 17:39:36 default[test] 45%|████▌ | 48414720/106826418 [00:01<00:02, 22336538.22it/s]
2019-07-23 17:39:36 default[test] 48%|████▊ | 51435520/106826418 [00:02<00:02, 24224996.22it/s]
2019-07-23 17:39:36 default[test] 51%|█████▏ | 54763520/106826418 [00:02<00:01, 26376309.32it/s]
2019-07-23 17:39:36 default[test] 54%|█████▍ | 57569280/106826418 [00:02<00:02, 21505161.66it/s]
2019-07-23 17:39:36 default[test] 56%|█████▌ | 60078080/106826418 [00:02<00:02, 22466550.18it/s]
2019-07-23 17:39:36 default[test] 59%|█████▉ | 63027200/106826418 [00:02<00:01, 24192591.42it/s]
2019-07-23 17:39:36 default[test] 61%|██████▏ | 65628160/106826418 [00:02<00:01, 24070010.24it/s]
2019-07-23 17:39:36 default[test] 64%|██████▍ | 68556800/106826418 [00:02<00:01, 25428249.96it/s]
2019-07-23 17:39:36 default[test] 68%|██████▊ | 72529920/106826418 [00:02<00:01, 28506739.68it/s]
2019-07-23 17:39:37 default[test] 71%|███████ | 75581440/106826418 [00:02<00:01, 28986836.20it/s]
2019-07-23 17:39:37 default[test] 74%|███████▎ | 78622720/106826418 [00:03<00:00, 29210576.39it/s]
2019-07-23 17:39:37 default[test] 76%|███████▋ | 81643520/106826418 [00:03<00:01, 22926790.84it/s]
2019-07-23 17:39:37 default[test] 79%|███████▉ | 84224000/106826418 [00:03<00:00, 23612840.24it/s]
2019-07-23 17:39:37 default[test] 82%|████████▏ | 87193600/106826418 [00:03<00:00, 25157952.55it/s]
2019-07-23 17:39:37 default[test] 84%|████████▍ | 89937920/106826418 [00:03<00:00, 25797481.66it/s]
2019-07-23 17:39:37 default[test] 87%|████████▋ | 92672000/106826418 [00:03<00:00, 26235841.07it/s]
2019-07-23 17:39:37 default[test] 89%|████████▉ | 95488000/106826418 [00:03<00:00, 26776710.45it/s]
2019-07-23 17:39:37 default[test] 92%|█████████▏| 98232320/106826418 [00:03<00:00, 26824171.60it/s]
2019-07-23 17:39:38 default[test] 95%|█████████▍| 100966400/106826418 [00:03<00:00, 26803548.31it/s]
2019-07-23 17:39:38 default[test] 97%|█████████▋| 103925760/106826418 [00:04<00:00, 27583062.30it/s]
2019-07-23 17:39:38 default[test] 100%|██████████| 106826418/106826418 [00:04<00:00, 25706775.94it/s]
2019-07-23 17:39:38 default[test] [W:pyppeteer.chromium_downloader]
2019-07-23 17:39:38 default[test] chromium download done.
2019-07-23 17:39:44 default[test] [W:pyppeteer.chromium_downloader] chromium extracted to: /root/.local/share/pyppeteer/local-chromium/575458
2019-07-23 17:39:46 default[test] [I:pyppeteer.launcher] Browser listening on: ws://127.0.0.1:22168/devtools/browser/c820f895-a90a-4242-a3fa-35dfda06be3f
2019-07-23 17:39:48 default[test] [2019-07-23 17:39:48 +0000] [9] [INFO] Handling signal: term
2019-07-23 17:39:48 default[test] [2019-07-23 17:39:48 +0000] [17] [INFO] Worker exiting (pid: 17)```
答案 0 :(得分：2)
Pyppeteer正在将Chrome可执行文件下载到不可写的本地文件系统[1]，这就是为什么当它尝试访问文件时，该文件不再存在并退出的原因。您可以将铬下载到Google Cloud Storage上的存储桶中，然后从那里读取文件。
在App Engine中，应用程序部署到的本地文件系统不可写。此行为可确保您的应用程序的安全性和可伸缩性。
但是，如果应用程序需要在运行时读写文件，则App Engine提供了内置的Google Cloud Storage流包装器，可让您使用许多标准的PHP文件系统功能来读写App Engine中的文件PHP应用。
答案 1 :(得分：0)
您实际上可以在Google App Engine Flex上运行Pyppeteer。您只需要定义一个Dockerfile并指向图像容器gcr.io/google_appengine/python，它是GCR的标准Python图像。
然后，您将要添加所有允许Chromium运行的linux库。
这是docker文件：
FROM gcr.io/google_appengine/python
RUN apt-get update && apt-get -y install gconf-service libasound2 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget
RUN virtualenv /env
ENV VIRTUAL_ENV /env
ENV PATH /env/bin:$PATH
RUN mkdir /your/app/path
ADD . /your/app/path
WORKDIR /your/app/path
ADD requirements.txt /your/app/path/requirements.txt
RUN pip3 install -r /your/app/path/requirements.txt
EXPOSE 8080
ENTRYPOINT ["gunicorn", "-b", ":8080", "main:app"]
然后在您的python文件中设置标志
args = ['--no-sandbox']
browser = await launch(args=args)
page = await browser.newPage()
因此Chromium可以以root身份运行。
您可以查看我的完整演练和说明here：