/usr/share/doc/gawk/examples/network/coreserv.awk is in gawk 1:4.1.4+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | # CGI Library and core of a web server
#
# Juergen Kahrs, Juergen.Kahrs@vr-web.de
# with Arnold Robbins, arnold@skeeve.com
# September 2000
# Global arrays
# GETARG --- arguments to CGI GET command
# MENU --- menu items (path names)
# PARAM --- parameters of form x=y
# Optional variable MyHost contains host address
# Optional variable MyPort contains port number
# Needs TopHeader, TopDoc, TopFooter
# Sets MyPrefix, HttpService, Status, Reason
BEGIN {
if (MyHost == "") {
"uname -n" | getline MyHost
close("uname -n")
}
if (MyPort == 0) MyPort = 8080
HttpService = "/inet/tcp/" MyPort "/0/0"
MyPrefix = "http://" MyHost ":" MyPort
SetUpServer()
while ("awk" != "complex") {
# header lines are terminated this way
RS = ORS = "\r\n"
Status = 200 # this means OK
Reason = "OK"
Header = TopHeader
Document = TopDoc
Footer = TopFooter
if (GETARG["Method"] == "GET") {
HandleGET()
} else if (GETARG["Method"] == "HEAD") {
# not yet implemented
} else if (GETARG["Method"] != "") {
print "bad method", GETARG["Method"]
}
Prompt = Header Document Footer
print "HTTP/1.0", Status, Reason |& HttpService
print "Connection: Close" |& HttpService
print "Pragma: no-cache" |& HttpService
len = length(Prompt) + length(ORS)
print "Content-length:", len |& HttpService
print ORS Prompt |& HttpService
# ignore all the header lines
while ((HttpService |& getline) > 0)
continue
# stop talking to this client
close(HttpService)
# wait for new client request
HttpService |& getline
# do some logging
print systime(), strftime(), $0
CGI_setup($1, $2, $3)
}
}
function CGI_setup( method, uri, version, i)
{
delete GETARG
delete MENU
delete PARAM
GETARG["Method"] = method
GETARG["URI"] = uri
GETARG["Version"] = version
i = index(uri, "?")
if (i > 0) { # is there a "?" indicating a CGI request?
split(substr(uri, 1, i-1), MENU, "[/:]")
split(substr(uri, i+1), PARAM, "&")
for (i in PARAM) {
PARAM[i] = _CGI_decode(PARAM[i])
j = index(PARAM[i], "=")
GETARG[substr(PARAM[i], 1, j-1)] = \
substr(PARAM[i], j+1)
}
} else { # there is no "?", no need for splitting PARAMs
split(uri, MENU, "[/:]")
}
for (i in MENU) # decode characters in path
if (i > 4) # but not those in host name
MENU[i] = _CGI_decode(MENU[i])
}
function _CGI_decode(str, hexdigs, i, pre, code1, code2,
val, result)
{
hexdigs = "123456789abcdef"
i = index(str, "%")
if (i == 0) # no work to do
return str
do {
pre = substr(str, 1, i-1) # part before %xx
code1 = substr(str, i+1, 1) # first hex digit
code2 = substr(str, i+2, 1) # second hex digit
str = substr(str, i+3) # rest of string
code1 = tolower(code1)
code2 = tolower(code2)
val = index(hexdigs, code1) * 16 \
+ index(hexdigs, code2)
result = result pre sprintf("%c", val)
i = index(str, "%")
} while (i != 0)
if (length(str) > 0)
result = result str
return result
}
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