From 5b17cfaa74fff633959985366cb40d4e12f7cae9 Mon Sep 17 00:00:00 2001
From: eleksir <eleksir@exs-elm.ru>
Date: Sun, 1 Sep 2019 10:33:10 +0300
Subject: [PATCH] Make api more rich

* Implement help
* Add simple dns resolve commands
* Add punycode <-> unicode conversions
* Add time info
---
 lib/utils.pm | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 myapi.psgi   | 56 ++++++++++++++++++++++++++++++++++++---------------
 2 files changed, 97 insertions(+), 16 deletions(-)

diff --git a/lib/utils.pm b/lib/utils.pm
index 1faa3a8..7a0b419 100644
--- a/lib/utils.pm
+++ b/lib/utils.pm
@@ -1,6 +1,8 @@
 package utils;
 
 use strict;
+use Socket; # for name resolves
+use Net::LibIDN ':all';
 use vars qw/$VERSION/;
 
 $VERSION = "1.0";
@@ -21,4 +23,59 @@ sub ip ($) {
 	return ('200', 'text/plain', $msg);
 }
 
+sub getaddrbyname ($) {
+	my $name = shift;
+	return ('400', 'text/plain', "Supply hostname\n") unless (defined($name));
+	my @addresses = gethostbyname($name);
+
+	if (@addresses > 0) {
+		@addresses = map { inet_ntoa($_) } @addresses[4 .. $#addresses];
+
+		if (@addresses > 1) {
+			return ('200', 'text/plain', join("\n", @addresses) . "\n");
+		} else {
+			return ('200', 'text/plin', "$addresses[0]\n");
+		}
+	} else {
+		return ('404', 'text/plain', "Not found\n");
+	}
+}
+
+sub getnamebyaddr ($) {
+	my $addr = shift;
+	chomp($addr);
+	return ('400', 'text/plain', "Supply address\n") unless (defined($addr));
+	my $name = gethostbyaddr(inet_aton($addr), AF_INET);
+
+	if (defined($name)) {
+		return ('200', 'text/plain', "$name\n");
+	} else {
+		return ('404', 'text/plain', "Not found\n");
+	}
+}
+
+sub punycoder ($) {
+	my $str = shift;
+	$str = Net::LibIDN::idn_to_ascii($str, 'utf-8');
+	if (defined($str)) {
+		return ('200', 'text/plain', "$str\n");
+	} else {
+		return ('400', 'text/plain', "Bad string\n")
+	}
+}
+
+sub punydecoder ($) {
+	my $str = shift;
+	$str = Net::LibIDN::idn_to_unicode($str, 'utf-8');
+	if (defined($str)) {
+		return ('200', 'text/plain', "$str\n");
+	} else {
+		return ('400', 'text/plain', "Bad string\n")
+	}
+}
+
+sub mytime () {
+	return ('200', 'text/plain', time() . "\n");
+}
+
 1;
diff --git a/myapi.psgi b/myapi.psgi
index 8a34514..332694b 100644
--- a/myapi.psgi
+++ b/myapi.psgi
@@ -21,7 +21,8 @@ my $main :shared = 0;
 #unless ($main) { threads->create('mythread'); }
 
 my $CONF = loadConf();
-if ($CONF->{api}->{prefix} eq '/') { $CONF->{prefix} = ''; }
+if ($CONF->{api}->{prefix} eq '/') { $CONF->{api}->{prefix} = ''; }
+my $prefix = $CONF->{api}->{prefix};
 
 my $app = sub {
 	my $env = shift;
@@ -30,27 +31,50 @@ my $app = sub {
 	my $status = '404';
 	my $content = 'text/plain';
 
-	if ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/d") {
+	if ($env->{PATH_INFO} eq "$prefix/help") {
+		$status = '200';
+		$msg = << 'EOL';
+/ping - pong
+/ip - your ip
+/getaddrbyname - header hostname must be set
+/getnameaaddr - header adderess must be set
+/punycoder - header hostname must be set
+/punydecoder - header hostname must be set
+/time - current time
+/quote - famous or not famous quotes
+/fortune - synonym for quote
+EOL
+	} elsif ($env->{PATH_INFO} eq "$prefix/d") {
 		$status = '200';
 		$msg = Dumper($env);
-	} elsif ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/ping") {
+	} elsif ($env->{PATH_INFO} eq "$prefix/ping") {
 		($status, $content, $msg) = ping::pong();
-	} elsif ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/ip") {
+	} elsif ($env->{PATH_INFO} eq "$prefix/ip") {
 		($status, $content, $msg) = utils::ip($env);
-	} elsif (($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/fortune") or
-		 ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/quote")) {
+	} elsif (($env->{PATH_INFO} eq "$prefix/getaddrbyname")) {
+		($status, $content, $msg) = utils::getaddrbyname($env->{HTTP_HOSTNAME});
+	} elsif (($env->{PATH_INFO} eq "$prefix/getnamebyaddr")) {
+		($status, $content, $msg) = utils::getnamebyaddr($env->{HTTP_ADDRESS});
+	} elsif (($env->{PATH_INFO} eq "$prefix/punycoder")) {
+		($status, $content, $msg) = utils::punycoder($env->{HTTP_HOSTNAME});
+	} elsif (($env->{PATH_INFO} eq "$prefix/punydecoder")) {
+		($status, $content, $msg) = utils::punydecoder($env->{HTTP_HOSTNAME});
+	} elsif (($env->{PATH_INFO} eq "$prefix/time")) {
+		($status, $content, $msg) = utils::mytime();
+	} elsif (($env->{PATH_INFO} eq "$prefix/fortune") or
+		 ($env->{PATH_INFO} eq "$prefix/quote")) {
 		($status, $content, $msg) = easter_egg::quote();
-	} elsif (($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/chanserv") or
-		 ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/chanServ") or
-		 ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/ChanServ") or
-		 ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/CHANSERV")) {
+	} elsif (($env->{PATH_INFO} eq "$prefix/chanserv") or
+		 ($env->{PATH_INFO} eq "$prefix/chanServ") or
+		 ($env->{PATH_INFO} eq "$prefix/ChanServ") or
+		 ($env->{PATH_INFO} eq "$prefix/CHANSERV")) {
 		($status, $content, $msg) = easter_egg::chanserv();
-	} elsif (($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/nickserv") or
-		 ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/nickServ") or
-		 ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/NickServ") or
-		 ($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/NICKSERV")) {
+	} elsif (($env->{PATH_INFO} eq "$prefix/nickserv") or
+		 ($env->{PATH_INFO} eq "$prefix/nickServ") or
+		 ($env->{PATH_INFO} eq "$prefix/NickServ") or
+		 ($env->{PATH_INFO} eq "$prefix/NICKSERV")) {
 		($status, $content, $msg) = easter_egg::nickserv();
-	} elsif (($env->{PATH_INFO} eq "$CONF->{api}->{prefix}/me")) {
+	} elsif ($env->{PATH_INFO} eq "$prefix/me") {
 		($status, $content, $msg) = easter_egg::me();
 	}
 
@@ -96,7 +120,7 @@ sub mythread () {
 
 
 
-# vim: set ft=perl noet ai :
+# vim: ft=perl noet ai ts=4 sw=4 sts=4:
 __END__
 
 https://toster.ru/q/75226