remove old inetd+git examples and exec_cgi

While it was technically interesting and fun to tunnel arbitrary
protocols over a semi-compliant Rack interface, nobody actually does
it (and anybody who does can look in our git history).  This was
from back in 2009 when this was one of the few servers that could
handle chunked uploads,were one of the few users of chunked uploads,
nowadays everyone does it! (or do they? :)

A newer version of exec_cgi.rb still lives on in the repository of
yet another horribly-named server, but there's no point in bloating
the installation footprint of somewhat popular server such as unicorn.

1 files changed, 0 insertions, 154 deletions

diff --git a/lib/unicorn/app/exec_cgi.rb b/lib/unicorn/app/exec_cgi.rb
deleted file mode 100644
index 232b681..0000000
--- a/lib/unicorn/app/exec_cgi.rb
+++ /dev/null
@@ -1,154 +0,0 @@
-# -*- encoding: binary -*-
-# :enddoc:
-require 'unicorn'
-
-module Unicorn::App
-
-  # This class is highly experimental (even more so than the rest of Unicorn)
-  # and has never run anything other than cgit.
-  class ExecCgi < Struct.new(:args)
-
-    CHUNK_SIZE = 16384
-    PASS_VARS = %w(
-      CONTENT_LENGTH
-      CONTENT_TYPE
-      GATEWAY_INTERFACE
-      AUTH_TYPE
-      PATH_INFO
-      PATH_TRANSLATED
-      QUERY_STRING
-      REMOTE_ADDR
-      REMOTE_HOST
-      REMOTE_IDENT
-      REMOTE_USER
-      REQUEST_METHOD
-      SERVER_NAME
-      SERVER_PORT
-      SERVER_PROTOCOL
-      SERVER_SOFTWARE
-    ).map { |x| x.freeze } # frozen strings are faster for Hash assignments
-
-    class Body < Unicorn::TmpIO
-      def body_offset=(n)
-        sysseek(@body_offset = n)
-      end
-
-      def each
-        sysseek @body_offset
-        # don't use a preallocated buffer for sysread since we can't
-        # guarantee an actual socket is consuming the yielded string
-        # (or if somebody is pushing to an array for eventual concatenation
-        begin
-          yield sysread(CHUNK_SIZE)
-        rescue EOFError
-          break
-        end while true
-      end
-    end
-
-    # Intializes the app, example of usage in a config.ru
-    #   map "/cgit" do
-    #     run Unicorn::App::ExecCgi.new("/path/to/cgit.cgi")
-    #   end
-    def initialize(*args)
-      self.args = args
-      first = args[0] or
-        raise ArgumentError, "need path to executable"
-      first[0] == ?/ or args[0] = ::File.expand_path(first)
-      File.executable?(args[0]) or
-        raise ArgumentError, "#{args[0]} is not executable"
-    end
-
-    # Calls the app
-    def call(env)
-      out, err = Body.new, Unicorn::TmpIO.new
-      inp = force_file_input(env)
-      pid = fork { run_child(inp, out, err, env) }
-      inp.close
-      pid, status = Process.waitpid2(pid)
-      write_errors(env, err, status) if err.stat.size > 0
-      err.close
-
-      return parse_output!(out) if status.success?
-      out.close
-      [ 500, { 'Content-Length' => '0', 'Content-Type' => 'text/plain' }, [] ]
-    end
-
-    private
-
-    def run_child(inp, out, err, env)
-      PASS_VARS.each do |key|
-        val = env[key] or next
-        ENV[key] = val
-      end
-      ENV['SCRIPT_NAME'] = args[0]
-      ENV['GATEWAY_INTERFACE'] = 'CGI/1.1'
-      env.keys.grep(/^HTTP_/) { |key| ENV[key] = env[key] }
-
-      $stdin.reopen(inp)
-      $stdout.reopen(out)
-      $stderr.reopen(err)
-      exec(*args)
-    end
-
-    # Extracts headers from CGI out, will change the offset of out.
-    # This returns a standard Rack-compatible return value:
-    #   [ 200, HeadersHash, body ]
-    def parse_output!(out)
-      size = out.stat.size
-      out.sysseek(0)
-      head = out.sysread(CHUNK_SIZE)
-      offset = 2
-      head, body = head.split(/\n\n/, 2)
-      if body.nil?
-        head, body = head.split(/\r\n\r\n/, 2)
-        offset = 4
-      end
-      offset += head.length
-      out.body_offset = offset
-      size -= offset
-      prev = nil
-      headers = Rack::Utils::HeaderHash.new
-      head.split(/\r?\n/).each do |line|
-        case line
-        when /^([A-Za-z0-9-]+):\s*(.*)$/ then headers[prev = $1] = $2
-        when /^[ \t]/ then headers[prev] << "\n#{line}" if prev
-        end
-      end
-      status = headers.delete("Status") || 200
-      headers['Content-Length'] = size.to_s
-      [ status, headers, out ]
-    end
-
-    # ensures rack.input is a file handle that we can redirect stdin to
-    def force_file_input(env)
-      inp = env['rack.input']
-      # inp could be a StringIO or StringIO-like object
-      if inp.respond_to?(:size) && inp.size == 0
-        ::File.open('/dev/null', 'rb')
-      else
-        tmp = Unicorn::TmpIO.new
-
-        buf = inp.read(CHUNK_SIZE)
-        begin
-          tmp.syswrite(buf)
-        end while inp.read(CHUNK_SIZE, buf)
-        tmp.sysseek(0)
-        tmp
-      end
-    end
-
-    # rack.errors this may not be an IO object, so we couldn't
-    # just redirect the CGI executable to that earlier.
-    def write_errors(env, err, status)
-      err.seek(0)
-      dst = env['rack.errors']
-      pid = status.pid
-      dst.write("#{pid}: #{args.inspect} status=#{status} stderr:\n")
-      err.each_line { |line| dst.write("#{pid}: #{line}") }
-      dst.flush
-    end
-
-  end
-
-end