brew install 失败

mac 安装 tesseract

brew install tesseract

失败报错

==> Downloading https://github.com/tesseract-ocr/tessdata_fast/raw/4.0.0/eng.traineddata
######################################################################## 100.0%
curl: (7) Failed to connect to raw.githubusercontent.com port 443: Connection refused
Error: Failed to download resource "tesseract--eng"
Download failed: https://github.com/tesseract-ocr/tessdata_fast/raw/4.0.0/eng.traineddata

手动curl 或者 browser get OK
代理设置啥的无果

参考一些文档和打印信息后发现下载的都缓存在指定目录下
～/Library/Caches/Homebrew/downloads/

==> Downloading https://github.com/uclouvain/openjpeg/archive/v2.3.1.tar.gz
Already downloaded: /Users/xx/Library/Caches/Homebrew/downloads/e80173a0e76f1052c3d696641bf0a93631ababf780c1aa99ec1d4bd21bbf0e4b--openjpeg-2.3.1.tar.gz

e80173a0e76f1052c3d696641bf0a93631ababf780c1aa99ec1d4bd21bbf0e4b--openjpeg-2.3.1.tar.gz
这个前缀是啥
https://github.com/Homebrew/brew
下载源码查看
ruby写的

# 加密算法 library/homebrew/extend/pathname.rb
  def sha256
    require "digest/sha2"
    Digest::SHA256.file(self).hexdigest
  end

# library/homebrew/down_strategy.rb
  def cached_location
    return @cached_location if defined?(@cached_location)

    url_sha256 = Digest::SHA256.hexdigest(url)
    downloads = Pathname.glob(HOMEBREW_CACHE/"downloads/#{url_sha256}--*")
                        .reject { |path| path.extname.end_with?(".incomplete") }

    @cached_location = if downloads.count == 1
      downloads.first
    else
      HOMEBREW_CACHE/"downloads/#{url_sha256}--#{resolved_basename}"
    end
  end

https://www.cmd5.com/hash.aspx?s=123456
测试验证几个URL无误后就OK了

Already downloaded: /Users/xx/Library/Caches/Homebrew/downloads/e9d299931c7904231cdcc678f32df30f903c0a59c45047f7db1304d843ae1136--leptonica-1.80.0.tar.gz
==> Downloading https://github.com/tesseract-ocr/tessdata_fast/raw/4.0.0/eng.traineddata
Already downloaded: /Users/xx/Library/Caches/Homebrew/downloads/43826098cb7f5ea003b3ea7e4cce9d6dc7196455e5e820328293b7a2527d6ea6--eng.traineddata
==> Downloading https://github.com/tesseract-ocr/tessdata_fast/raw/4.0.0/osd.traineddata
######################################################################## 100.0%
curl: (7) Failed to connect to raw.githubusercontent.com port 443: Connection refused

大爷的，还有其他的

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