< draft-ietf-urn-ietf-02.txt   draft-ietf-urn-ietf-03.txt >
Internet-Draft Ryan Moats Internet-Draft Ryan Moats
draft-ietf-urn-ietf-02.txt AT&T draft-ietf-urn-ietf-03.txt AT&T
Expires in six months July 1997 Expires in six months September 1997
A URN Namespace for IETF Documents A URN Namespace for IETF Documents
Filename: draft-ietf-urn-ietf-02.txt Filename: draft-ietf-urn-ietf-03.txt
Status of This Memo Status of This Memo
This document is an Internet-Draft. Internet-Drafts are working This document is an Internet-Draft. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its documents of the Internet Engineering Task Force (IETF), its
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Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net
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Coast), or ftp.isi.edu (US West Coast). Coast), or ftp.isi.edu (US West Coast).
Abstract Abstract
A system for Uniform Resource Names (URNs) must be capable of A system for Uniform Resource Names (URNs) must be capable of
supporting new naming systems. As an example of how a new namespace supporting new naming systems. As an example of proposing a new
may be proposed, this document presents a naming system based on the namespace, this document proposes the ''ietf'' namespace. This
namespace consists of the RFC family of documents (RFCs, STDs, and
FYIs) developed by the IETF and published by the RFC editor and the
minutes of working groups (WG) and birds of a feather (BOF) meetings
that occur during IETF conferences. Both the current URN framework
and URN syntax support this namespace.
0. Changes from -02
This document has been restructured to use the template proposed in
draft-ietf-urn-nid-req-03.txt. Example Perl scripts for resolving
this namespace have been supplied in an Appendix.
1. Introduction
This document proposes the "ietf" namespace, which consists of the
RFC family of documents (RFCs, STDs, and FYIs) developed by the IETF RFC family of documents (RFCs, STDs, and FYIs) developed by the IETF
and published by the RFC editor and the minutes of working groups and published by the RFC editor and the minutes of working groups
(WG) and birds of a feather (BOF) meetings that occur during IETF (WG) and birds of a feather (BOF) meetings that occur during IETF
conferences. This namespace can be supported within the URN conferences.
framework and the currently proposed syntax for URNs.
1. Namespace Syntax The namespace specification is for a formal namespace.
Consistent with the URN syntax specification [1], each namespace must 2. Specification Template
specify syntax related information that is specific to that
namespace. This section covers these specifications.
1.1. Namespace Identifier (NID) Namespace ID:
The namespace identifier for this namespace is "ietf". "ietf" requested.
1.2. Namespace Specific String (NSS) Declared registrant of the namespace:
The Namespace Specific String has the following ABNF [2] Ryan Moats
specification: jayhawk@att.com
NSS = (family ":" number) / ("mtg-" number "-" wgbofname)
family = "rfc" / "std" / "fyi" Declaration of structure:
number = 1*DIGIT The identifier has the following ABNF [2] specification:
wgbofname = 1*LETDIGIT NSS = (family ":" number) / ("mtg-" number "-" wgbofname)
family = "rfc" / "std" / "fyi"
number = 1*DIGIT
wgbofname = 1*LETDIGIT
LETDIGIT = DIGIT / %x41..%x5a / %x61..%x7a
DIGIT = %x30..%x39
LETDIGIT = DIGIT / %x41..%x5a / %x61..%x7a If the IESG (or it successor) adds a new document
series, this ABNF specification will need to be
updated. Further, If a working group or BOF is
created that used characters outside the range of this
ABNF specification, this specification will need to be
updated. Any system intended to resolve names for
this namespace should be written with the awareness
that this could occur at any time.
DIGIT = %x30..%x39 Identifier uniqueness considerations:
The ABNF specification for "family" is based on the current documents Because the rfc-editor assigns the RFC, FYI and STD
in the RFC family. As new document series are added to the IETF number uniquely these URNs are unique. The meeting
family by the IESG (or its successor), this ABNF specification will minutes portion of the namespace is guaranteed unique
need to be updated. Any system intended to resolve names for this because the URN includes the sequence number of the
namespace should be written with the awareness that a new document IETF conference
series may be introduced at any time.
The ABNF specification for "wgbofname" is based on the current and Identifier persistence considerations:
past abbreviations for working groups and BOFs in the IETF. If a
working group or BOF is created that used characters outside the
range of this ABNF specification, this specification will need to be
updated. Any system intended to resolve names for this namespace
should be written with the awareness that this could occur at any
time.
1.3. Assignment of URNs in this Namespace Persistence of the URNs of this namespace is dependent
on the persistence of the underlying documents.
URNs are assigned in the namespace in two ways. The first is when a Process of identifier assignment:
new RFC, FYI or STD is passed by the IESG and published by the RFC
Editor. This new document will have a new series number and will
therefore define a new URN. The document mappings maintained by the
RFC Editor (the index files "rfc-index.txt", "fyi-index.txt", "std-
index.txt") are defined to be the definitive statement of the
assignment of RFC Family URNs in this namespace.
The second way a URN is assigned is when a working group or birds of Assignment of URNs from this namespace occur in two
a feather files meeting minutes as part of an IETF conference. The ways. The first is when a new RFC, FYI or STD is
list of minutes maintained by the IETF for each working group and passed by the IESG and published by the RFC
conference in the subtree pointed at by the URL ftp://ietf.org/ietf/ Editor. This new document will have a new series
is considered the definitive assignment of URNs for working group or number and will therefore define a new URN. The
birds of a feather minutes. document mappings maintained by the RFC Editor (the
index files "rfc-index.txt", "fyi-index.txt",
"std-index.txt") are defined to be the definitive
statement of the assignment of RFC Family URNs in this
namespace.
1.4. Additional Reserved Characters The second way a URN is assigned is when a working
group or birds of a feather files meeting minutes as
part of an IETF conference. The list of minutes
maintained by the IETF for each working group and
conference in the subtree pointed at by the URL
ftp://ietf.org/ietf/ is considered the definitive
assignment of URNs for working group or birds of a
feather minutes.
No characters in addition to those specified in [1] are reserved by Process of identifier resolution:
this namespace.
1.5. Additional Lexical Equivalence Relations A mirrored copy of the underlying documentation is
required to resolve these URNs. Resolution via
HTTP is accomplished by a set of simple Perl cgi-bin
scripts presented in Appendix A.
Note that the entire URN is case-insensitive, because of the Rules for Lexical Equivalence:
definition of the NSS.
1.6. Functional Equivalence Relations The entire URN is case-insensitive.
Rules for equivalence in this namespace are embedded in the document Conformance with URN Syntax:
mappings maintained by the RFC Editor (the index files "rfc-
index.txt", "fyi-index.txt", "std-index.txt"). A resource is
equivalent to the set of resources implied by the "(Also...)"
construct in these mappings. As an example, the URN
"urn:ietf:rfc:1661" is equivalent to th URN "urn:ietf:std:51" because
the "rfc-index.txt" map shows that RFC 1661 is also STD 51. However,
the URN "urn:ietf:std:51" is equivalent to the SET of URNs
"urn:ietf:rfc:1661" and "urn:ietf:rfc:1662" since the "std-index.txt"
shows that STD 51 is also RFC 1661 and RFC 1662. Therefore, a
resolver receiving a N2R request for "urn:ietf:std:51" MUST return
either STD 51 or BOTH RFC 1661 and RFC 1662.
2. Comments There are no additional characters reserved.
Readers will notice that this namespace does not include internet Validation mechanism:
drafts. While these documents are published by the internet drafts
editor, they were excluded because they do not provide persistent None specified.
resources to refer to (all internet drafts expire after six months).
This is as opposed to the RFC family of documents which never expire Scope:
(an RFC may be obsoleted or superceded but the actual RFC document
itself does not expire). Global.
3. Security Considerations 3. Security Considerations
Because this namespace defines no additional reserved characters, it Because this namespace defines no additional reserved characters, it
does not add any security considerations beyond those inherent from does not add any security considerations beyond those inherent from
the existence of the reserved characters from [1]. Further, the the existence of the reserved characters from [1]. Further, none of
definition of the NSS above does not use any of the reserved the reserved characters from [1] are used in the definition of the
characters from [1], which means that resolvers for this namespace NSS. This means that resolvers for this namespace may be considered
may be considered "secure" in the sense that any escaping of "secure" in the sense that any escaping of characters in the NSS MUST
characters in the NSS MUST result in the resolver indicating that the result in the resolver indicating that the URN has incorrect syntax.
URN has incorrect syntax.
4. Acknowledgments 4. Acknowledgments
Thanks to various members of the URN working group for comments on Thanks to various members of the URN working group for comments on
earlier drafts of this document. The work described in this document earlier drafts of this document. The work described in this document
is partially supported by the National Science Foundation, is partially supported by the National Science Foundation,
Cooperative Agreement NCR-9218179. Cooperative Agreement NCR-9218179.
4. References 4. References
Request For Comments (RFC) and Internet Draft documents are available Request For Comments (RFC) and Internet Draft documents are available
from <URL:ftp://ftp.internic.net> and numerous mirror sites. from <URL:ftp://ftp.internic.net> and numerous mirror sites.
[1] R. Moats, "URN Syntax," RFC 2141, May 5, 1997. [1] R. Moats, "URN Syntax," RFC 2141, May 5, 1997.
[2] D. Crocker, P. Overell, "Augmented BNF for Syntax [2] D. Crocker, P. Overell, "Augmented BNF for Syntax Specifica-
Specifications: ABNF," Internet Draft (work in pro- tions: ABNF," Internet Draft (work in progress), January
gress), January 1997. 1997.
5. Author's Address 5. Author's Address
Ryan Moats Ryan Moats
AT&T AT&T
15621 Drexel Circle 15621 Drexel Circle
Omaha, NE 68135-2358 Omaha, NE 68135-2358
USA USA
Phone: +1 402 894-9456 Phone: +1 402 894-9456
EMail: jayhawk@att.com EMail: jayhawk@att.com
This Internet Draft expires January 31, 1998. Appendix A. Example Resolution Scripts
The following scripts are examples that can be used for resolving
URNs in this namespace.
A.1 I2C
#!/usr/local/bin/perl
use strict;
#
# this is a URN 2 URC resolver for the ietf namespace
#
my(%cite) = (
rfc => "/ftp/rfc/rfc-index.txt",
fyi => "/ftp/fyi/fyi-index.txt",
std => "/ftp/std/std-index.txt"
);
my(%number2date) = (
41 => "98apr",
40 => "97dec", 39 => "97aug", 38 => "97apr",
37 => "96dec", 36 => "96jun", 35 => "96mar",
34 => "95dec", 33 => "95jul", 32 => "95apr",
31 => "94dec", 30 => "94jul", 29 => "94mar",
28 => "93nov", 27 => "93jul", 26 => "93mar",
25 => "92nov", 24 => "92jul", 23 => "92mar",
22 => "91nov", 21 => "91jul", 20 => "91mar",
19 => "90dec" );
my($wgpath) = "/ftp/ietf";
my($urn) = $ENV{'QUERY_STRING'};
my($host) = $ENV{'SERVER_NAME'}; #get my host name for ftp: URLs
my($accept) = $ENV{'HTTP_ACCEPT'}; #this is the "Accept:" HTTP header
(&resolve1($1, $2), exit) if ($urn =~ /urn:ietf:(\w*):(\d*)/i);
(&resolve2($1, $2), exit) if ($urn =~ /urn:ietf:mtg-(\d*)-(\w*)/i);
&urn_error("400 Bad Request\n");
sub resolve2 {
my($ietfnum, $sesnam) = @_;
&urn_error("404 Not Found\n") if (!defined $number2date{$ietfnum});
my($date)=$number2date{$ietfnum};
my($link)="$wgpath/$sesnam/$sesnam-minutes-$date.txt";
if (-f $link) {
print "HTTP/1.0 200 OK\r\n";
print "Content-type: text/html\r\n\r\n";
print "<HTML>\n<TITLE>Citation for $urn</TITLE>\n";
print "<BODY>\n";
print "<H1><A HREF=\"$link\">$urn</A>:</H1>\n";
print "Minutes of the $sesnam working group from the " . &end($ietfnum) . " IETF";
print "</BODY>\n</HTML>\n";
return;
}
my($link)="$wgpath/$date/$sesnam-minutes-$date.txt";
if (-f $link) {
print "HTTP/1.0 200 OK\r\n";
print "Content-type: text/html\r\n\r\n";
print "<HTML>\n<TITLE>Citation for $urn</TITLE>\n";
print "<BODY>\n";
print "<H1><A HREF=\"$link\">$urn</A>:</H1>\n";
print "Minutes of the $sesnam working group from the " . &end($ietfnum) . " IETF";
print "</BODY>\n</HTML>\n";
return;
}
&urn_error("404 Not Found\n");
}
sub end {
my($inarg)=@_;
return $inarg . "st" if ($inarg =~ /1$/);
return $inarg . "nd" if ($inarg =~ /2$/);
return $inarg . "rd" if ($inarg =~ /3$/);
return $inarg . "th";
}
sub resolve1 {
my($flag,@bib,$i,$k,$j,$done,@ref);
my($l,$link);
my($scheme, $value) = @_;
$scheme =~ tr/A-Z/a-z/;
if (!defined $cite{$scheme}) {
&urn_error("404 Not Found\n");
}
$flag = 0;
open(INPUT, "$cite{$scheme}");
while (<INPUT>) {
$flag = 1 if (/^0*$value /);
if ($flag == 1) {
last if (/^$/);
chop;
push @bib,$_;
}
}
if ($scheme ne "rfc") {
print "HTTP/1.0 200 OK\r\n";
print "Content-type: text/html\r\n\r\n";
$bib[0] =~ s/^[0-9]*\s*/<B>/;
for ($i=0; $i<=$#bib; $i+=1) {
last if ($bib[$i] =~ s/\./.<\/B>/);
}
for ($i=0;$i<=$#bib;$i+=1) {
$k=$bib[$i];
while ($k =~ /(fyi|std|rfc)([0-9]+)(.*)/i) {
push @ref,"$1$2";
$k=$3;
}
$done="";
foreach $j (@ref) {
next if ($done =~ $j);
$done .= "$j ";
$l = $j;
$l =~ tr/A-Z/a-z/;
$link=&make_link("$l");
$bib[$i] =~ s/$j/<A HREF="$link">$j<\/A>/g;
}
}
print "<HTML>\n<TITLE>Citation for $urn</TITLE>\n";
print "<BODY>\n";
$link=&make_link("$scheme$value");
print "<H1><A HREF=\"$link\">$scheme$value</A>:</H1>\n";
foreach $i (@bib) {
print "$i\n";
}
print "</BODY>\n</HTML>\n";
} else {
print "HTTP/1.0 200 OK\r\n";
print "Content-type: text/html\r\n\r\n";
$bib[0] =~ s/^[0-9]*\s*//;
$j=0;
for ($i=0; $i<=$#bib; $i+=1) {
$j += ($bib[$i] =~ s/, "/, <B>"/);
$j += ($bib[$i] =~ s/",/"<\/B>,/);
}
for ($i=0;$i<=$#bib;$i+=1) {
$k=$bib[$i];
while ($k =~ /(fyi\s|std\s|rfc)([0-9]+)(.*)/i) {
push @ref,"$1$2";
$k=$3;
}
$done="";
foreach $j (@ref) {
next if ($done =~ $j);
$done .= "$j ";
$l = $j;
$l =~ s/\s//g;
$l =~ tr/A-Z/a-z/;
$link=&make_link("$l");
$bib[$i] =~ s/$j/<A HREF="$link">$j<\/A>/g;
}
}
print "<HTML>\n<TITLE>Citation for $urn</TITLE>\n";
print "<BODY>\n";
$link=&make_link("$scheme$value");
print "<H1><A HREF=\"$link\">$scheme$value</A>:</H1>\n";
foreach $i (@bib) {
print "$i\n";
}
print "</BODY>\n</HTML>\n";
}
}
sub make_link {
my($sc);
my($inarg)=@_;
($sc=$1) if ($inarg =~ /([a-z]*)/);
return "/$sc/$inarg.ps" if (-e "/ftp/$sc/$inarg.ps");
return "/$sc/$inarg.html" if (-e "/ftp/$sc/$inarg.html");
return "/$sc/$inarg.txt";
}
sub urn_error {
my($code) = @_; #store failure code here...
print "HTTP/1.0 $code";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2C $code</title></head>\n";
print "<BODY>\n";
print "<h1>URN to URC resolution failed for the URN:</h1>\n";
print "<hr><h3>$urn</h3>\n";
print "</body>\n";
print "</html>\n";
exit;
};
A.2 I2L
#!/usr/local/bin/perl
use strict;
#
# this is a URN 2 URL resolver for the ietf namespace
#
my(%pathbase) = (
rfc => "rfc/rfc",
fyi => "fyi/fyi",
std => "std/std"
);
my(%number2date) = (
38 => "97apr",
37 => "96dec", 36 => "96jun", 35 => "96mar",
34 => "95dec", 33 => "95jul", 32 => "95apr",
31 => "94dec", 30 => "94jul", 29 => "94mar",
28 => "93nov", 27 => "93jul", 26 => "93mar",
25 => "92nov", 24 => "92jul", 23 => "92mar",
22 => "91nov", 21 => "91jul", 20 => "91mar",
19 => "90dec" );
my($wgpath) = "/ftp/ietf";
my($urn) = $ENV{'QUERY_STRING'};
my($host) = $ENV{'SERVER_NAME'}; #get my host name for ftp: URLs
my($accept) = $ENV{'HTTP_ACCEPT'}; #this is the "Accept:" HTTP header
(&resolve1($1, $2), exit) if ($urn =~ /urn:ietf:(\w*):(\d*)/i);
(&resolve2($1, $2), exit) if ($urn =~ /urn:ietf:mtg-(\d*)-(\w*)/i);
&urn_error("400 Bad Request\n");
sub resolve2 {
my($ietfnum, $sesnam) = @_;
&urn_error("404 Not Found\n") if (!defined $number2date{$ietfnum});
my($date)=$number2date{$ietfnum};
my($link)="$wgpath/$sesnam/$sesnam-minutes-$date.txt";
if (-f $link) {
print "HTTP/1.0 302 Moved temporarily\n";
print "Location: $link\n";
return;
}
my($link)="$wgpath/$date/$sesnam-minutes-$date.txt";
if (-f $link) {
print "HTTP/1.0 302 Moved temporarily\n";
print "Location: $link\n";
return;
}
&urn_error("404 Not Found\n");
}
sub end {
my($inarg)=@_;
return $inarg . "st" if ($inarg =~ /1$/);
return $inarg . "nd" if ($inarg =~ /2$/);
return $inarg . "rd" if ($inarg =~ /3$/);
return $inarg . "th";
}
sub resolve1 {
my($flag,@bib,$i,$k,$j,$done,@ref);
my($l,$link);
my($scheme, $value) = @_;
$scheme =~ tr/A-Z/a-z/;
&urn_error("404 Not Found\n")if (!defined $pathbase{$scheme});
my($txttry)="/ftp/$pathbase{$scheme}$value.txt";
my($pstry)="/ftp/$pathbase{$scheme}$value.ps";
my($htmltry)="/ftp/$pathbase{$scheme}$value.html";
MIME_SWITCH: {
if ($accept =~ /application\/postscript/ && -f $pstry) {
print "HTTP/1.0 302 Moved temporarily\n";
print "Location: http://$host/$pathbase{$scheme}$value.ps\n\n";
last MIME_SWITCH;
}
if ($accept =~ /text\/html/ && -f $htmltry) {
print "HTTP/1.0 302 Moved temporarily\n";
print "Location: http://$host/$pathbase{$scheme}$value.html\n\n";
last MIME_SWITCH;
}
if ($accept =~ /\*\/\*|text\/plain/ && -f $txttry) {
print "HTTP/1.0 302 Moved temporarily\n";
print "Location: http://$host/$pathbase{$scheme}$value.txt\n\n";
last MIME_SWITCH;
}
&urn_error("404 Not Found\n");
}
}
sub urn_error {
my($code) = @_; #store failure code here...
print "HTTP/1.0 $code";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2L $code</title></head>\n";
print "<BODY>\n";
print "<h1>URN to URL resolution failed for the URN:</h1>\n";
print "<hr><h3>$urn</h3>\n";
print "</body>\n";
print "</html>\n";
exit;
}
A.3 I2Ls
#!/usr/local/bin/perl
use strict;
#
# this is a URN 2 URLs resolver for the ietf namespace
#
my(@urls);
my(%pathbase) = (
rfc => "rfc/rfc",
fyi => "fyi/fyi",
std => "std/std"
);
my(%number2date) = (
38 => "97apr",
37 => "96dec", 36 => "96jun", 35 => "96mar",
34 => "95dec", 33 => "95jul", 32 => "95apr",
31 => "94dec", 30 => "94jul", 29 => "94mar",
28 => "93nov", 27 => "93jul", 26 => "93mar",
25 => "92nov", 24 => "92jul", 23 => "92mar",
22 => "91nov", 21 => "91jul", 20 => "91mar",
19 => "90dec" );
my($wgpath) = "/ftp/ietf";
my($urn) = $ENV{'QUERY_STRING'};
my($host) = $ENV{'SERVER_NAME'}; #get my host name for ftp: URLs
my($accept) = $ENV{'HTTP_ACCEPT'}; #this is the "Accept:" HTTP header
(&resolve1($1, $2), exit) if ($urn =~ /urn:ietf:(\w*):(\d*)/i);
(&resolve2($1, $2), exit) if ($urn =~ /urn:ietf:mtg-(\d*)-(\w*)/i);
&urn_error("400 Bad Request\n");
sub resolve2 {
my($ietfnum, $sesnam) = @_;
&urn_error("404 Not Found\n") if (!defined $number2date{$ietfnum});
my($date)=$number2date{$ietfnum};
my($link)="$wgpath/$sesnam/$sesnam-minutes-$date.txt";
if (-f $link) {
$link=~s/^\/ftp\///;
my($ftplink)="ftp://$host/$link";
my($httplink)="http://$host/$link";
my($glink)="gopher://$host:70/0/$link";
if ($accept =~ /text\/uri-list/) { #look for text/uri-list, otherwise text/html
print "HTTP/1.0 200 OK\n";
print "Content-type: text/uri-list\n\n\n";
print "#$urn\n";
print "$ftplink\n";
print "$httplink\n";
print "$glink\n";
}
if ($accept =~ /\*\/\*|text\/html/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2Ls</title></head>\n";
print "<BODY>\n";
print "<h1>URN $urn resolves to the following URLs:</h1>\n";
print "<hr><ul>\n";
print "<a href=\"$ftplink\">$ftplink</a>\n";
print "<a href=\"$httplink\">$httplink</a>\n";
print "<a href=\"$glink\">$glink</a>\n";
print "</UL>\n</body>\n</HTML>\n";
}
return;
}
my($link)="$wgpath/$date/$sesnam-minutes-$date.txt";
if (-f $link) {
$link=~s/^\/ftp\///;
my($ftplink)="ftp://$host/$link";
my($httplink)="http://$host/$link";
my($glink)="gopher://$host:70/0/$link";
if ($accept =~ /text\/uri-list/) { #look for text/uri-list, otherwise text/html
print "HTTP/1.0 200 OK\n";
print "Content-type: text/uri-list\n\n\n";
print "#$urn\n";
print "$ftplink\n";
print "$httplink\n";
print "$glink\n";
}
if ($accept =~ /\*\/\*|text\/html/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2Ls</title></head>\n";
print "<BODY>\n";
print "<h1>URN $urn resolves to the following URLs:</h1>\n";
print "<hr><ul>\n";
print "<a href=\"$ftplink\">$ftplink</a>\n";
print "<a href=\"$httplink\">$httplink</a>\n";
print "<a href=\"$glink\">$glink</a>\n";
print "</UL>\n</body>\n</HTML>\n";
}
return;
}
&urn_error("404 Not Found\n");
}
sub resolve1 {
my($flag,@bib,$i,$k,$j,$done,@ref);
my($l,$link);
my($scheme, $value) = @_;
$scheme =~ tr/A-Z/a-z/;
&urn_error("404 Not Found\n")if (!defined $pathbase{$scheme});
my($try)="/ftp/$pathbase{$scheme}$value.txt";
if (-f $try) {
push(@urls, "http://$host/$pathbase{$scheme}$value.txt");
push(@urls, "ftp://$host/$pathbase{$scheme}$value.txt");
push(@urls, "gopher://$host:70/0/$pathbase{$scheme}$value.txt");
}
$try="/ftp/$pathbase{$scheme}$value.ps";
if (-f $try) {
push(@urls, "http://$host/$pathbase{$scheme}$value.ps");
push(@urls, "ftp://$host/$pathbase{$scheme}$value.ps");
push(@urls, "gopher://$host:70/0/$pathbase{$scheme}$value.ps");
}
$try="/ftp/$pathbase{$scheme}$value.html";
if (-f $try) {
push(@urls, "http://$host/$pathbase{$scheme}$value.html");
push(@urls, "ftp://$host/$pathbase{$scheme}$value.html");
}
&urn_error("404 Not Found\n") if ($#urls == -1);
MIME_SWITCH: {
if ($accept =~ /text\/uri-list/) { #look for text/uri-list, otherwise text/html
print "HTTP/1.0 200 OK\n";
print "Content-type: text/uri-list\n\n\n";
print "#$urn\n";
foreach $i (@urls) {
print "$i\n";
}
last MIME_SWITCH;
}
if ($accept =~ /\*\/\*|text\/html/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2Ls</title></head>\n";
print "<BODY>\n";
print "<h1>URN $urn resolves to the following URLs:</h1>\n";
print "<hr><ul>\n";
foreach $i (@urls) {
print "<LI><A HREF=\"$i\">$i</A>\n";
}
print "</UL>\n</body>\n</HTML>\n";
last MIME_SWITCH;
}
}
}
sub urn_error {
my($code) = @_; #store failure code here...
print "HTTP/1.0 $code";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2L $code</title></head>\n";
print "<BODY>\n";
print "<h1>URN to URL resolution failed for the URN:</h1>\n";
print "<hr><h3>$urn</h3>\n";
print "</body>\n";
print "</html>\n";
exit;
}
A.4 I2Ns
#!/usr/local/bin/perl
use strict;
#
# this is a URN 2 URNs resolver for the ietf namespace
#
my(%cite) = (
rfc => "/ftp/rfc/rfc-index.txt",
fyi => "/ftp/fyi/fyi-index.txt",
std => "/ftp/std/std-index.txt"
);
my(%number2date) = (
38 => "97apr",
37 => "96dec", 36 => "96jun", 35 => "96mar",
34 => "95dec", 33 => "95jul", 32 => "95apr",
31 => "94dec", 30 => "94jul", 29 => "94mar",
28 => "93nov", 27 => "93jul", 26 => "93mar",
25 => "92nov", 24 => "92jul", 23 => "92mar",
22 => "91nov", 21 => "91jul", 20 => "91mar",
19 => "90dec" );
my($wgpath) = "/ftp/ietf";
my($urn) = $ENV{'QUERY_STRING'};
my($host) = $ENV{'SERVER_NAME'}; #get my host name for ftp: URLs
my($accept) = $ENV{'HTTP_ACCEPT'}; #this is the "Accept:" HTTP header
(&resolve1($1, $2), exit) if ($urn =~ /urn:ietf:(\w*):(\d*)/i);
(&resolve2($1, $2), exit) if ($urn =~ /urn:ietf:mtg-(\d*)-(\w*)/i);
&urn_error("400 Bad Request\n");
sub resolve2 {
my($ietfnum, $sesnam) = @_;
&urn_error("404 Not Found\n") if (!defined $number2date{$ietfnum});
my($date)=$number2date{$ietfnum};
my($link)="$wgpath/$sesnam/$sesnam-minutes-$date.txt";
if (-f $link) {
if ($accept =~ /text\/uri-list/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/uri-list\n\n\n";
print "#$urn\n";
return;
}
if ($accept =~ /\*\/\*|text\/html/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2Ns</title></head>\n";
print "<BODY>\n";
print "<h1>URN $urn resolves to the following URNs:</h1>\n";
print "<hr><ul>\n";
print "</UL>\n</body>\n</HTML>\n";
return;
}
}
my($link)="$wgpath/$date/$sesnam-minutes-$date.txt";
if (-f $link) {
if ($accept =~ /text\/uri-list/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/uri-list\n\n\n";
print "#$urn\n";
return;
}
if ($accept =~ /\*\/\*|text\/html/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2Ns</title></head>\n";
print "<BODY>\n";
print "<h1>URN $urn resolves to the following URNs:</h1>\n";
print "<hr><ul>\n";
print "</UL>\n</body>\n</HTML>\n";
return;
}
}
&urn_error("404 Not Found\n");
}
sub end {
my($inarg)=@_;
return $inarg . "st" if ($inarg =~ /1$/);
return $inarg . "nd" if ($inarg =~ /2$/);
return $inarg . "rd" if ($inarg =~ /3$/);
return $inarg . "th";
}
sub resolve1 {
my($flag,@bib,$i,$k,$j,$done,@ref);
my($l,$link);
my($scheme, $value) = @_;
$scheme =~ tr/A-Z/a-z/;
if (!defined $cite{$scheme}) {
&urn_error("404 Not Found\n");
}
$flag = 0;
open(INPUT, "$cite{$scheme}");
while (<INPUT>) {
$flag = 1 if (/^0*$value /);
if ($flag == 1) {
last if (/^$/);
chop;
push @bib,$_;
}
}
$k=join " ",@bib;
while ($k =~ /(\S*)\s*(fyi|std|rfc)\s*([0-9]+)(.*)/i) {
$k=$4;
$a=$2; $b=$3;
if (($a ne $scheme || $b ne $value) && ($1 !~ /obso/i)){
$a =~ tr/A-Z/a-z/;
push @ref,"urn:ietf:$a:$b";
}
}
MIME_SWITCH: {
if ($accept =~ /text\/uri-list/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/uri-list\n\n\n";
print "#$urn\n";
foreach $i (@ref) {
print "$i\n";
}
last MIME_SWITCH;
}
if ($accept =~ /\*\/\*|text\/html/) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2Ns</title></head>\n";
print "<BODY>\n";
print "<h1>URN $urn resolves to the following URNs:</h1>\n";
print "<hr><ul>\n";
foreach $i (@ref) {
print "<li>$i: Click to resolve using\n";
print "<a href=\"http://dsm0.ds.internic.net:8080/uri-res/I2C?$i\">I2C</a>,\n";
print "<a href=\"http://dsm0.ds.internic.net:8080/uri-res/I2L?$i\">I2L</a>,\n";
print "<a href=\"http://dsm0.ds.internic.net:8080/uri-res/I2Ls?$i\">I2Ls</a>,\n";
print "<a href=\"http://dsm0.ds.internic.net:8080/uri-res/I2R?$i\">I2R</a>,\n";
print "<a href=\"http://dsm0.ds.internic.net:8080/uri-res/I2Rs?$i\">I2Rs</a>\n";
}
print "</UL>\n</body>\n</HTML>\n";
}
}
}
sub make_link {
my($sc);
my($inarg)=@_;
($sc=$1) if ($inarg =~ /([a-z]*)/);
return "/$sc/$inarg.ps" if (-e "/ftp/$sc/$inarg.ps");
return "/$sc/$inarg.html" if (-e "/ftp/$sc/$inarg.html");
return "/$sc/$inarg.txt";
}
sub urn_error {
my($code) = @_; #store failure code here...
print "HTTP/1.0 $code";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2Ns $code</title></head>\n";
print "<BODY>\n";
print "<h1>URN to URC resolution failed for the URN:</h1>\n";
print "<hr><h3>$urn</h3>\n";
print "</body>\n";
print "</html>\n";
exit;
};
A.5 I2R
#!/usr/local/bin/perl
use strict;
#
# this is a URN 2 resource resolver for the ietf namespace
#
my(%pathbase) = (
rfc => "rfc/rfc",
fyi => "fyi/fyi",
std => "std/std"
);
my(%number2date) = (
38 => "97apr",
37 => "96dec", 36 => "96jun", 35 => "96mar",
34 => "95dec", 33 => "95jul", 32 => "95apr",
31 => "94dec", 30 => "94jul", 29 => "94mar",
28 => "93nov", 27 => "93jul", 26 => "93mar",
25 => "92nov", 24 => "92jul", 23 => "92mar",
22 => "91nov", 21 => "91jul", 20 => "91mar",
19 => "90dec" );
my($wgpath) = "/ftp/ietf";
my($urn) = $ENV{'QUERY_STRING'};
my($host) = $ENV{'SERVER_NAME'}; #get my host name for ftp: URLs
my($accept) = $ENV{'HTTP_ACCEPT'}; #this is the "Accept:" HTTP header
(&resolve1($1, $2), exit) if ($urn =~ /urn:ietf:(\w*):(\d*)/i);
(&resolve2($1, $2), exit) if ($urn =~ /urn:ietf:mtg-(\d*)-(\w*)/i);
&urn_error("400 Bad Request\n");
sub resolve2 {
my($ietfnum, $sesnam) = @_;
&urn_error("404 Not Found\n") if (!defined $number2date{$ietfnum});
my($date)=$number2date{$ietfnum};
my($link)="$wgpath/$sesnam/$sesnam-minutes-$date.txt";
if (-f $link) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/plain\n\n";
open(FILE, "$link");
while (<FILE>) {
print $_;
}
close FILE;
return;
}
my($link)="$wgpath/$date/$sesnam-minutes-$date.txt";
if (-f $link) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/plain\n\n";
open(FILE, "$link");
while (<FILE>) {
print $_;
}
close FILE;
return;
}
&urn_error("404 Not Found\n");
}
sub end {
my($inarg)=@_;
return $inarg . "st" if ($inarg =~ /1$/);
return $inarg . "nd" if ($inarg =~ /2$/);
return $inarg . "rd" if ($inarg =~ /3$/);
return $inarg . "th";
}
sub resolve1 {
my($flag,@bib,$i,$k,$j,$done,@ref);
my($l,$link);
my($scheme, $value) = @_;
$scheme =~ tr/A-Z/a-z/;
&urn_error("404 Not Found\n")if (!defined $pathbase{$scheme});
my($txttry)="/ftp/$pathbase{$scheme}$value.txt";
my($pstry)="/ftp/$pathbase{$scheme}$value.ps";
my($htmltry)="/ftp/$pathbase{$scheme}$value.html";
MIME_SWITCH: {
if ($accept =~ /application\/postscript/ && -f $pstry) {
print "HTTP/1.0 200 OK\n";
print "Content-type: application/postscript\n\n";
open(FILE, "$pstry");
while (<FILE>) {
print $_;
}
close FILE;
last MIME_SWITCH;
}
if ($accept =~ /text\/html/ && -f $htmltry) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/html\n\n";
open(FILE, "$htmltry");
while (<FILE>) {
print $_;
}
close FILE;
last MIME_SWITCH;
}
if ($accept =~ /\*\/\*|text\/plain/ && -f $txttry) {
print "HTTP/1.0 200 OK\n";
print "Content-type: text/plain\n\n";
open(FILE, "$txttry");
while (<FILE>) {
print $_;
}
close FILE;
last MIME_SWITCH;
}
&urn_error("404 Not Found\n");
}
}
sub urn_error {
my($code) = @_; #store failure code here...
print "HTTP/1.0 $code";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2L $code</title></head>\n";
print "<BODY>\n";
print "<h1>URN to URL resolution failed for the URN:</h1>\n";
print "<hr><h3>$urn</h3>\n";
print "</body>\n";
print "</html>\n";
exit;
}
A.6 I2Rs
#!/usr/local/bin/perl
use strict;
#
# this is a URN 2 resources resolver for the ietf namespace
#
my(@urls);
my(%pathbase) = (
rfc => "rfc/rfc",
fyi => "fyi/fyi",
std => "std/std"
);
my(%number2date) = (
38 => "97apr",
37 => "96dec", 36 => "96jun", 35 => "96mar",
34 => "95dec", 33 => "95jul", 32 => "95apr",
31 => "94dec", 30 => "94jul", 29 => "94mar",
28 => "93nov", 27 => "93jul", 26 => "93mar",
25 => "92nov", 24 => "92jul", 23 => "92mar",
22 => "91nov", 21 => "91jul", 20 => "91mar",
19 => "90dec" );
my($wgpath) = "/ftp/ietf";
my($urn) = $ENV{'QUERY_STRING'};
my($host) = $ENV{'SERVER_NAME'}; #get my host name for ftp: URLs
my($accept) = $ENV{'HTTP_ACCEPT'}; #this is the "Accept:" HTTP header
(&resolve1($1, $2), exit) if ($urn =~ /urn:ietf:(\w*):(\d*)/i);
(&resolve2($1, $2), exit) if ($urn =~ /urn:ietf:mtg-(\d*)-(\w*)/i);
&urn_error("400 Bad Request\n");
sub resolve2 {
my($ietfnum, $sesnam) = @_;
my(@vers,$i);
&urn_error("404 Not Found\n") if (!defined $number2date{$ietfnum});
my($date)=$number2date{$ietfnum};
my($link)="$wgpath/$sesnam/$sesnam-minutes-$date.txt";
if (-f $link) {
push(@vers,$link);
}
$link="$wgpath/$date/$sesnam-minutes-$date.txt";
if (-f $link) {
push(@vers,$link);
}
&urn_error("404 Not Found\n") if ($#vers==-1);
print "HTTP/1.0 200 OK\n";
print "Content-type: multipart/alternative; boundary=endpart\n\n";
foreach $i (@vers) {
print "--endpart\n";
if ($i =~ /html$/) {
print "Content-Type: text/html\n\n";
}
if ($i =~ /txt$/) {
print "Content-Type: text/plain\n\n";
}
if ($i =~ /ps$/) {
print "Content-Type: application/postscript\n\n";
}
open(FILE, "$i");
while (<FILE>) {
print "$_";
}
close FILE;
}
print "--endpart\n";
}
sub resolve1 {
my($flag,@bib,$i,$k,$j,$done,@ref);
my($l,$link,@vers);
my($scheme, $value) = @_;
$scheme =~ tr/A-Z/a-z/;
&urn_error("404 Not Found\n")if (!defined $pathbase{$scheme});
my($try)="/ftp/$pathbase{$scheme}$value.txt";
if (-f $try) {
push(@vers, $try);
}
$try="/ftp/$pathbase{$scheme}$value.ps";
if (-f $try) {
push(@vers, $try);
}
$try="/ftp/$pathbase{$scheme}$value.html";
if (-f $try) {
push(@vers, $try);
}
print "HTTP/1.0 200 OK\n";
print "Content-type: multipart/alternative; boundary=endpart\n\n";
foreach $i (@vers) {
print "--endpart\n";
if ($i =~ /html$/) {
print "Content-Type: text/html\n\n";
}
if ($i =~ /txt$/) {
print "Content-Type: text/plain\n\n";
}
if ($i =~ /ps$/) {
print "Content-Type: application/postscript\n\n";
}
open(FILE, "$i");
while (<FILE>) {
print "$_";
}
close FILE;
}
print "--endpart\n";
}
sub urn_error {
my($code) = @_; #store failure code here...
print "HTTP/1.0 $code";
print "Content-type: text/html\n\n<HTML>\n";
print "<head><title>URN Resolution: I2L $code</title></head>\n";
print "<BODY>\n";
print "<h1>URN to URL resolution failed for the URN:</h1>\n";
print "<hr><h3>$urn</h3>\n";
print "</body>\n";
print "</html>\n";
exit;
}
 End of changes. 32 change blocks. 
86 lines changed or deleted 97 lines changed or added

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