Created
July 13, 2018 08:27
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use hadoop hdfs in ruby
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class HDFSClient | |
attr_accessor :prefix_url | |
def initialize(prefix_url) | |
prefix_url.append("/") unless prefix_url.end_with?("/") | |
@prefix_url = prefix_url | |
end | |
def upload(file_name, file_path) | |
system "curl -i -L -s -X PUT -T #{file_path} \ | |
#{@prefix_url}#{file_name}\\?op\\=CREATE" | |
raise "😱 upload failed" unless $?.exitstatus == 0 | |
end | |
def download(file_name) | |
cmd = "curl \ | |
#{@prefix_url}#{file_name}\\?op\\=OPEN \ | |
--output #{file_name}" | |
system cmd | |
raise "😱 download failed" unless $?.exitstatus == 0 | |
end | |
end | |
# usage | |
# hdfs = HDFSClient.new("http://hadoop02.dev.rack.zhihu.com:50070/webhdfs/v1/user/ios/osee2binary/") | |
# hdfs.upload("upload.py", File.expand_path("upload.py", __dir__)) | |
# system "rm -rf upload.py" | |
# hdfs.download("upload.py") |
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