solution canvas node-pre-gyp install --fallback-to-build node-pre-gyp WARN Using needle for node-pre-gyp https download

#439 #477 #525

If the print information is (如果打印信息是)

canvas@2.6.1 install  *\node_modules\canvas
node-pre-gyp install --fallback-to-build
node-pre-gyp WARN Using needle for node-pre-gyp https download

Please add when installing (安装时请添加)

--canvas_binary_host_mirror=https://npm.taobao.org/mirrors/node-canvas-prebuilt/

Full command (完整命令)

npm i --canvas_binary_host_mirror=https://npm.taobao.org/mirrors/node-canvas-prebuilt/

If you install canvas separately (如果是单独安装canvas)

npm i  canvas --canvas_binary_host_mirror=https://npm.taobao.org/mirrors/node-canvas-prebuilt/

reference (参考)
https://github.com/mapbox/node-pre-gyp#download-binary-files-from-a-mirror

Explanation:This is because canvas's package.json uses these configurations
(解释：这是因为 canvas 的 package.json 使用了这些配置)

  "binary": {
    "module_name": "canvas",
    "module_path": "build/Release",
    "host": "https://github.com/node-gfx/node-canvas-prebuilt/releases/download/",
    "remote_path": "v{version}",
    "package_name": "{module_name}-v{version}-{node_abi}-{platform}-{libc}-{arch}.tar.gz"
  },

In some areas, the download address of github is slow, so you can use the --{module_name}_binary_host_mirror command to change the download address to solve the problem that the download is very slow, causing stuck in node-pre-gyp WARN Using needle for node-pre-gyp https download problem.
For other package problems, you can find the corresponding mirror address to solve.
(某些地区github的下载地址比较慢，所以可以通过--{module_name}_binary_host_mirror命令来更换下载地址，解决下载很慢，导致卡在node-pre-gyp WARN Using needle for node-pre-gyp https download的问题。
其他包的问题，可以找一下对应的镜像地址来解决。)

Another method is to set up an npm proxy to speed up access to github.
(另一种方法是设置npm代理，加速访问github。)

npm config set proxy http://server:port
npm config set https-proxy http://server:port

delete agent (删除代理)

npm config delete proxy
npm config delete https-proxy

keywords: (关键词：)
node-pre-gyp install --fallback-to-build node-pre-gyp WARN Using needle for node-pre-gyp https download

Start with the issue's package.json binary configuration and the referenced node-pre-gyp mirror documentation. The issue describes a canvas download workaround but names no repository file, test, or specific documentation location; completion would require deciding where the workaround belongs and documenting or otherwise addressing the installation behavior.