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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"
}