1c43a8f3d3
* url must be quoted inside the curl command otherwise '&' between
params are interpreted by shells
* View url format updated
* Streamer yielded the last row returned by curl ("}]") as nil
* Specs
51 lines
1.2 KiB
Ruby
51 lines
1.2 KiB
Ruby
module CouchRest
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class Streamer
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attr_accessor :db
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def initialize db
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@db = db
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end
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# Stream a view, yielding one row at a time. Shells out to <tt>curl</tt> to keep RAM usage low when you have millions of rows.
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def view name, params = nil, &block
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urlst = if /^_/.match(name) then
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"#{@db.root}/#{name}"
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else
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name = name.split('/')
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dname = name.shift
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vname = name.join('/')
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"#{@db.root}/_design/#{dname}/_view/#{vname}"
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end
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url = CouchRest.paramify_url urlst, params
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# puts "stream #{url}"
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first = nil
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IO.popen("curl --silent \"#{url}\"") do |view|
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first = view.gets # discard header
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while line = view.gets
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row = parse_line(line)
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block.call row unless row.nil? # last line "}]" discarded
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end
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end
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parse_first(first)
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end
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private
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def parse_line line
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return nil unless line
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if /(\{.*\}),?/.match(line.chomp)
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JSON.parse($1)
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end
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end
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def parse_first first
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return nil unless first
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parts = first.split(',')
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parts.pop
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line = parts.join(',')
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JSON.parse("#{line}}")
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rescue
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nil
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end
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end
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end
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