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✏️ Editing: eliza.awk

function SetUpServer() {
  SetUpEliza()
  TopHeader = \
    "<HTML><title>An HTTP-based System with GAWK</title>\
    <HEAD><META HTTP-EQUIV=\"Content-Type\"\
    CONTENT=\"text/html; charset=iso-8859-1\"></HEAD>\
    <BODY BGCOLOR=\"#ffffff\" TEXT=\"#000000\"\
    LINK=\"#0000ff\" VLINK=\"#0000ff\"\
    ALINK=\"#0000ff\"> <A NAME=\"top\">"
  TopDoc    = "\
   <h2>Please choose one of the following actions:</h2>\
   <UL>\
   <LI>\
   <A HREF=" MyPrefix "/AboutServer>About this server</A>\
   </LI><LI>\
   <A HREF=" MyPrefix "/AboutELIZA>About Eliza</A></LI>\
   <LI>\
   <A HREF=" MyPrefix \
      "/StartELIZA>Start talking to Eliza</A></LI></UL>"
  TopFooter = "</BODY></HTML>"
}
function HandleGET() {
  # A real HTTP server would treat some parts of the URI as a file name.
  # We take parts of the URI as menu choices and go on accordingly.
  if (MENU[2] == "AboutServer") {
    Document    = "This is not a CGI script.\
      This is an httpd, an HTML file, and a CGI script all \
      in one GAWK script. It needs no separate www-server, \
      no installation, and no root privileges.\
      <p>To run it, do this:</p><ul>\
      <li> start this script with \"gawk -f httpserver.awk\",</li>\
      <li> and on the same host let your www browser open location\
           \"http://localhost:8080\"</li>\
      </ul>\<p>\ Details of HTTP come from:</p><ul>\
            <li>Hethmon:  Illustrated Guide to HTTP</p>\
            <li>RFC 2068</li></ul><p>JK 14.9.1997</p>"
  } else if (MENU[2] == "AboutELIZA") {
    Document    = "This is an implementation of the famous ELIZA\
        program by Joseph Weizenbaum. It is written in GAWK and\
        uses an HTML GUI."
  } else if (MENU[2] == "StartELIZA") {
    gsub(/\+/, " ", GETARG["YouSay"])
    # Here we also have to substitute coded special characters
    Document    = "<form method=GET>" \
      "<h3>" ElizaSays(GETARG["YouSay"]) "</h3>\
      <p><input type=text name=YouSay value=\"\" size=60>\
      <br><input type=submit value=\"Tell her about it\"></p></form>"
  }
}
function ElizaSays(YouSay) {
  if (YouSay == "") {
    cost = 0
    answer = "HI, IM ELIZA, TELL ME YOUR PROBLEM"
  } else {
    q = toupper(YouSay)
    gsub("'", "", q)
    if (q == qold) {
      answer = "PLEASE DONT REPEAT YOURSELF !"
    } else {
      if (index(q, "SHUT UP") > 0) {
        answer = "WELL, PLEASE PAY YOUR BILL. ITS EXACTLY ... $"\
                 int(100*rand()+30+cost/100)
      } else {
        qold = q
        w = "-"                 # no keyword recognized yet
        for (i in k) {          # search for keywords
          if (index(q, i) > 0) {
            w = i
            break
          }
        }
        if (w == "-") {         # no keyword, take old subject
          w    = wold
          subj = subjold
        } else {                # find subject
          subj = substr(q, index(q, w) + length(w)+1)
          wold = w
          subjold = subj        #  remember keyword and subject
        }
        for (i in conj)
           gsub(i, conj[i], q)   # conjugation
        # from all answers to this keyword, select one randomly
        answer = r[indices[int(split(k[w], indices) * rand()) + 1]]
        # insert subject into answer
        gsub("_", subj, answer)
      }
    }
  }
  cost += length(answer) # for later payment : 1 cent per character
  return answer
}
function SetUpEliza() {
  srand()
  wold = "-"
  subjold = " "

# table for conjugation
  conj[" ARE "     ] = " AM "
  conj["WERE "     ] = "WAS "
  conj[" YOU "     ] = " I "
  conj["YOUR "     ] = "MY "
  conj[" IVE "     ] =\
  conj[" I HAVE "  ] = " YOU HAVE "
  conj[" YOUVE "   ] =\
  conj[" YOU HAVE "] = " I HAVE "
  conj[" IM "      ] =\
  conj[" I AM "    ] = " YOU ARE "
  conj[" YOURE "   ] =\
  conj[" YOU ARE " ] = " I AM "

# table of all answers
  r[1]   = "DONT YOU BELIEVE THAT I CAN  _"
  r[2]   = "PERHAPS YOU WOULD LIKE TO BE ABLE TO _ ?"
  r[3]   = "YOU WANT ME TO BE ABLE TO _ ?"
  r[4]   = "PERHAPS YOU DONT WANT TO _ "
  r[5]   = "DO YOU WANT TO BE ABLE TO _ ?"
  r[6]   = "WHAT MAKES YOU THINK I AM _ ?"
  r[7]   = "DOES IT PLEASE YOU TO BELIEVE I AM _ ?"
  r[8]   = "PERHAPS YOU WOULD LIKE TO BE _ ?"
  r[9]   = "DO YOU SOMETIMES WISH YOU WERE _ ?"
  r[10]  = "DONT YOU REALLY _ ?"
  r[11]  = "WHY DONT YOU _ ?"
  r[12]  = "DO YOU WISH TO BE ABLE TO _ ?"
  r[13]  = "DOES THAT TROUBLE YOU ?"
  r[14]  = "TELL ME MORE ABOUT SUCH FEELINGS"
  r[15]  = "DO YOU OFTEN FEEL _ ?"
  r[16]  = "DO YOU ENJOY FEELING _ ?"
  r[17]  = "DO YOU REALLY BELIEVE I DONT _ ?"
  r[18]  = "PERHAPS IN GOOD TIME I WILL _ "
  r[19]  = "DO YOU WANT ME TO _ ?"
  r[20]  = "DO YOU THINK YOU SHOULD BE ABLE TO _ ?"
  r[21]  = "WHY CANT YOU _ ?"
  r[22]  = "WHY ARE YOU INTERESTED IN WHETHER OR NOT I AM _ ?"
  r[23]  = "WOULD YOU PREFER IF I WERE NOT _ ?"
  r[24]  = "PERHAPS IN YOUR FANTASIES I AM _ "
  r[25]  = "HOW DO YOU KNOW YOU CANT _ ?"
  r[26]  = "HAVE YOU TRIED ?"
  r[27]  = "PERHAPS YOU CAN NOW _ "
  r[28]  = "DID YOU COME TO ME BECAUSE YOU ARE _ ?"
  r[29]  = "HOW LONG HAVE YOU BEEN _ ?"
  r[30]  = "DO YOU BELIEVE ITS NORMAL TO BE _ ?"
  r[31]  = "DO YOU ENJOY BEING _ ?"
  r[32]  = "WE WERE DISCUSSING YOU -- NOT ME"
  r[33]  = "Oh, I _"
  r[34]  = "YOU'RE NOT REALLY TALKING ABOUT ME, ARE YOU ?"
  r[35]  = "WHAT WOULD IT MEAN TO YOU, IF YOU GOT _ ?"
  r[36]  = "WHY DO YOU WANT _ ?"
  r[37]  = "SUPPOSE YOU SOON GOT _"
  r[38]  = "WHAT IF YOU NEVER GOT _ ?"
  r[39]  = "I SOMETIMES ALSO WANT _"
  r[40]  = "WHY DO YOU ASK ?"
  r[41]  = "DOES THAT QUESTION INTEREST YOU ?"
  r[42]  = "WHAT ANSWER WOULD PLEASE YOU THE MOST ?"
  r[43]  = "WHAT DO YOU THINK ?"
  r[44]  = "ARE SUCH QUESTIONS IN YOUR MIND OFTEN ?"
  r[45]  = "WHAT IS IT THAT YOU REALLY WANT TO KNOW ?"
  r[46]  = "HAVE YOU ASKED ANYONE ELSE ?"
  r[47]  = "HAVE YOU ASKED SUCH QUESTIONS BEFORE ?"
  r[48]  = "WHAT ELSE COMES TO MIND WHEN YOU ASK THAT ?"
  r[49]  = "NAMES DON'T INTEREST ME"
  r[50]  = "I DONT CARE ABOUT NAMES -- PLEASE GO ON"
  r[51]  = "IS THAT THE REAL REASON ?"
  r[52]  = "DONT ANY OTHER REASONS COME TO MIND ?"
  r[53]  = "DOES THAT REASON EXPLAIN ANYTHING ELSE ?"
  r[54]  = "WHAT OTHER REASONS MIGHT THERE BE ?"
  r[55]  = "PLEASE DON'T APOLOGIZE !"
  r[56]  = "APOLOGIES ARE NOT NECESSARY"
  r[57]  = "WHAT FEELINGS DO YOU HAVE WHEN YOU APOLOGIZE ?"
  r[58]  = "DON'T BE SO DEFENSIVE"
  r[59]  = "WHAT DOES THAT DREAM SUGGEST TO YOU ?"
  r[60]  = "DO YOU DREAM OFTEN ?"
  r[61]  = "WHAT PERSONS APPEAR IN YOUR DREAMS ?"
  r[62]  = "ARE YOU DISTURBED BY YOUR DREAMS ?"
  r[63]  = "HOW DO YOU DO ... PLEASE STATE YOUR PROBLEM"
  r[64]  = "YOU DON'T SEEM QUITE CERTAIN"
  r[65]  = "WHY THE UNCERTAIN TONE ?"
  r[66]  = "CAN'T YOU BE MORE POSITIVE ?"
  r[67]  = "YOU AREN'T SURE ?"
  r[68]  = "DON'T YOU KNOW ?"
  r[69]  = "WHY NO _ ?"
  r[70]  = "DON'T SAY NO, IT'S ALWAYS SO NEGATIVE"
  r[71]  = "WHY NOT ?"
  r[72]  = "ARE YOU SURE ?"
  r[73]  = "WHY NO ?"
  r[74]  = "WHY ARE YOU CONCERNED ABOUT MY _ ?"
  r[75]  = "WHAT ABOUT YOUR OWN _ ?"
  r[76]  = "CAN'T YOU THINK ABOUT A SPECIFIC EXAMPLE ?"
  r[77]  = "WHEN ?"
  r[78]  = "WHAT ARE YOU THINKING OF ?"
  r[79]  = "REALLY, ALWAYS ?"
  r[80]  = "DO YOU REALLY THINK SO ?"
  r[81]  = "BUT YOU ARE NOT SURE YOU _ "
  r[82]  = "DO YOU DOUBT YOU _ ?"
  r[83]  = "IN WHAT WAY ?"
  r[84]  = "WHAT RESEMBLANCE DO YOU SEE ?"
  r[85]  = "WHAT DOES THE SIMILARITY SUGGEST TO YOU ?"
  r[86]  = "WHAT OTHER CONNECTION DO YOU SEE ?"
  r[87]  = "COULD THERE REALLY BE SOME CONNECTIONS ?"
  r[88]  = "HOW ?"
  r[89]  = "YOU SEEM QUITE POSITIVE"
  r[90]  = "ARE YOU SURE ?"
  r[91]  = "I SEE"
  r[92]  = "I UNDERSTAND"
  r[93]  = "WHY DO YOU BRING UP THE TOPIC OF FRIENDS ?"
  r[94]  = "DO YOUR FRIENDS WORRY YOU ?"
  r[95]  = "DO YOUR FRIENDS PICK ON YOU ?"
  r[96]  = "ARE YOU SURE YOU HAVE ANY FRIENDS ?"
  r[97]  = "DO YOU IMPOSE ON YOUR FRIENDS ?"
  r[98]  = "PERHAPS YOUR LOVE FOR FRIENDS WORRIES YOU"
  r[99]  = "DO COMPUTERS WORRY YOU ?"
  r[100] = "ARE YOU TALKING ABOUT ME IN PARTICULAR ?"
  r[101] = "ARE YOU FRIGHTENED BY MACHINES ?"
  r[102] = "WHY DO YOU MENTION COMPUTERS ?"
  r[103] = "WHAT DO YOU THINK MACHINES HAVE TO DO WITH YOUR PROBLEMS ?"
  r[104] = "DON'T YOU THINK COMPUTERS CAN HELP PEOPLE ?"
  r[105] = "WHAT IS IT ABOUT MACHINES THAT WORRIES YOU ?"
  r[106] = "SAY, DO YOU HAVE ANY PSYCHOLOGICAL PROBLEMS ?"
  r[107] = "WHAT DOES THAT SUGGEST TO YOU ?"
  r[108] = "I SEE"
  r[109] = "IM NOT SURE I UNDERSTAND YOU FULLY"
  r[110] = "COME COME ELUCIDATE YOUR THOUGHTS"
  r[111] = "CAN YOU ELABORATE ON THAT ?"
  r[112] = "THAT IS QUITE INTERESTING"
  r[113] = "WHY DO YOU HAVE PROBLEMS WITH MONEY ?"
  r[114] = "DO YOU THINK MONEY IS EVERYTHING ?"
  r[115] = "ARE YOU SURE THAT MONEY IS THE PROBLEM ?"
  r[116] = "I THINK WE WANT TO TALK ABOUT YOU, NOT ABOUT ME"
  r[117] = "WHAT'S ABOUT ME ?"
  r[118] = "WHY DO YOU ALWAYS BRING UP MY NAME ?"
  # table for looking up answers that
  # fit to a certain keyword
  k["CAN YOU"]      = "1 2 3"
  k["CAN I"]        = "4 5"
  k["YOU ARE"]      =\
  k["YOURE"]        = "6 7 8 9"
  k["I DONT"]       = "10 11 12 13"
  k["I FEEL"]       = "14 15 16"
  k["WHY DONT YOU"] = "17 18 19"
  k["WHY CANT I"]   = "20 21"
  k["ARE YOU"]      = "22 23 24"
  k["I CANT"]       = "25 26 27"
  k["I AM"]         =\
  k["IM "]          = "28 29 30 31"
  k["YOU "]         = "32 33 34"
  k["I WANT"]       = "35 36 37 38 39"
  k["WHAT"]         =\
  k["HOW"]          =\
  k["WHO"]          =\
  k["WHERE"]        =\
  k["WHEN"]         =\
  k["WHY"]          = "40 41 42 43 44 45 46 47 48"
  k["NAME"]         = "49 50"
  k["CAUSE"]        = "51 52 53 54"
  k["SORRY"]        = "55 56 57 58"
  k["DREAM"]        = "59 60 61 62"
  k["HELLO"]        =\
  k["HI "]          = "63"
  k["MAYBE"]        = "64 65 66 67 68"
  k[" NO "]         = "69 70 71 72 73"
  k["YOUR"]         = "74 75"
  k["ALWAYS"]       = "76 77 78 79"
  k["THINK"]        = "80 81 82"
  k["LIKE"]         = "83 84 85 86 87 88 89"
  k["YES"]          = "90 91 92"
  k["FRIEND"]       = "93 94 95 96 97 98"
  k["COMPUTER"]     = "99 100 101 102 103 104 105"
  k["-"]            = "106 107 108 109 110 111 112"
  k["MONEY"]        = "113 114 115"
  k["ELIZA"]        = "116 117 118"
}

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