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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
#
# The httpd_ procedures implement a stub http server.
#
# Copyright (c) 1997-1998 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# SCCS: @(#) httpd 1.2 98/02/20 14:51:59
#set httpLog 1
proc httpd_init {{port 8015}} {
socket -server httpdAccept $port
}
proc httpd_log {args} {
global httpLog
if {[info exists httpLog] && $httpLog} {
puts stderr "httpd: [join $args { }]"
}
}
array set httpdErrors {
204 {No Content}
400 {Bad Request}
404 {Not Found}
503 {Service Unavailable}
504 {Service Temporarily Unavailable}
}
proc httpdError {sock code args} {
global httpdErrors
puts $sock "$code $httpdErrors($code)"
httpd_log "error: [join $args { }]"
}
proc httpdAccept {newsock ipaddr port} {
global httpd
upvar #0 httpd$newsock data
fconfigure $newsock -blocking 0 -translation {auto crlf}
httpd_log $newsock Connect $ipaddr $port
set data(ipaddr) $ipaddr
fileevent $newsock readable [list httpdRead $newsock]
}
# read data from a client request
proc httpdRead { sock } {
upvar #0 httpd$sock data
if {![info exists data(state)]} {
set readCount [gets $sock line]
if [regexp {(POST|GET|HEAD) ([^?]+)\??([^ ]*) HTTP/1.0} \
$line x data(proto) data(url) data(query)] {
set data(state) mime
httpd_log $sock Query $line
} else {
httpdError $sock 400
httpd_log $sock Error "bad first line:$line"
httpdSockDone $sock
}
return
} elseif {$data(state) == "mime"} {
set readCount [gets $sock line]
if {[regexp {Content-Length: (\d+)} $line match length]} {
set data(length) $length
}
} elseif {$data(state) == "query"} {
if {![info exist data(length_orig)]} {
set data(length_orig) $data(length)
}
set line [read $sock $data(length)]
set readCount [string length $line]
incr data(length) -$readCount
}
# string compare $readCount 0 maps -1 to -1, 0 to 0, and > 0 to 1
set state [string compare $readCount 0],$data(state),$data(proto)
httpd_log $sock $state
switch -- $state {
-1,mime,HEAD -
-1,mime,GET -
-1,mime,POST {
# gets would block
return
}
0,mime,HEAD -
0,mime,GET -
0,query,POST { httpdRespond $sock }
0,mime,POST { set data(state) query }
1,mime,HEAD -
1,mime,POST -
1,mime,GET {
if {[regexp {([^:]+):[ ]*(.*)} $line dummy key value]} {
set data(mime,[string tolower $key]) $value
}
}
-1,query,POST {
httpd_log $sock Error "unexpected eof on <$data(url)> request"
httpdError $sock 404
httpdSockDone $sock
}
1,query,POST {
append data(query) $line
if {$data(length) <= 0} {
set data(length) $data(length_orig)
httpdRespond $sock
}
}
default {
if [eof $sock] {
httpd_log $sock Error "unexpected eof on <$data(url)> request"
} else {
httpd_log $sock Error "unhandled state <$state> fetching <$data(url)>"
}
httpdError $sock 404
httpdSockDone $sock
}
}
}
proc httpdSockDone { sock } {
upvar #0 httpd$sock data
unset data
close $sock
}
# Respond to the query.
proc httpdRespond { sock } {
global httpd bindata port
upvar #0 httpd$sock data
switch -glob -- $data(url) {
*binary* {
set html "$bindata[info hostname]:$port$data(url)"
set type application/octet-stream
}
*post* {
set html "Got [string length $data(query)] bytes"
set type text/plain
}
default {
set type text/html
set html "<html><head><title>HTTP/1.0 TEST</title></head><body>
<h1>Hello, World!</h1>
<h2>$data(proto) $data(url)</h2>
"
if {[info exists data(query)] && [string length $data(query)]} {
append html "<h2>Query</h2>\n<dl>\n"
foreach {key value} [split $data(query) &=] {
append html "<dt>$key<dd>$value\n"
}
append html </dl>\n
}
append html </body></html>
}
}
if {$data(proto) == "HEAD"} {
puts $sock "HTTP/1.0 200 OK"
} else {
puts $sock "HTTP/1.0 200 Data follows"
}
puts $sock "Date: [clock format [clock clicks]]"
puts $sock "Content-Type: $type"
puts $sock "Content-Length: [string length $html]"
puts $sock ""
if {$data(proto) != "HEAD"} {
fconfigure $sock -translation binary
puts -nonewline $sock $html
}
httpd_log $sock Done ""
httpdSockDone $sock
}
|
