GIF89a;
Mini Shell
Mini Shell
package Net::HTTP::Methods;
require 5.005; # 4-arg substr
use strict;
use vars qw($VERSION);
$VERSION = "6.06";
my $CRLF = "\015\012"; # "\r\n" is not portable
*_bytes = defined(&utf8::downgrade) ?
sub {
unless (utf8::downgrade($_[0], 1)) {
require Carp;
Carp::croak("Wide character in HTTP request (bytes required)");
}
return $_[0];
}
:
sub {
return $_[0];
};
sub new {
my $class = shift;
unshift(@_, "Host") if @_ == 1;
my %cnf = @_;
require Symbol;
my $self = bless Symbol::gensym(), $class;
return $self->http_configure(\%cnf);
}
sub http_configure {
my($self, $cnf) = @_;
die "Listen option not allowed" if $cnf->{Listen};
my $explict_host = (exists $cnf->{Host});
my $host = delete $cnf->{Host};
my $peer = $cnf->{PeerAddr} || $cnf->{PeerHost};
if (!$peer) {
die "No Host option provided" unless $host;
$cnf->{PeerAddr} = $peer = $host;
}
if ($peer =~ s,:(\d+)$,,) {
$cnf->{PeerPort} = int($1); # always override
}
if (!$cnf->{PeerPort}) {
$cnf->{PeerPort} = $self->http_default_port;
}
if (!$explict_host) {
$host = $peer;
$host =~ s/:.*//;
}
if ($host && $host !~ /:/) {
my $p = $cnf->{PeerPort};
$host .= ":$p" if $p != $self->http_default_port;
}
$cnf->{Proto} = 'tcp';
my $keep_alive = delete $cnf->{KeepAlive};
my $http_version = delete $cnf->{HTTPVersion};
$http_version = "1.1" unless defined $http_version;
my $peer_http_version = delete $cnf->{PeerHTTPVersion};
$peer_http_version = "1.0" unless defined $peer_http_version;
my $send_te = delete $cnf->{SendTE};
my $max_line_length = delete $cnf->{MaxLineLength};
$max_line_length = 8*1024 unless defined $max_line_length;
my $max_header_lines = delete $cnf->{MaxHeaderLines};
$max_header_lines = 128 unless defined $max_header_lines;
return undef unless $self->http_connect($cnf);
$self->host($host);
$self->keep_alive($keep_alive);
$self->send_te($send_te);
$self->http_version($http_version);
$self->peer_http_version($peer_http_version);
$self->max_line_length($max_line_length);
$self->max_header_lines($max_header_lines);
${*$self}{'http_buf'} = "";
return $self;
}
sub http_default_port {
80;
}
# set up property accessors
for my $method (qw(host keep_alive send_te max_line_length max_header_lines peer_http_version)) {
my $prop_name = "http_" . $method;
no strict 'refs';
*$method = sub {
my $self = shift;
my $old = ${*$self}{$prop_name};
${*$self}{$prop_name} = shift if @_;
return $old;
};
}
# we want this one to be a bit smarter
sub http_version {
my $self = shift;
my $old = ${*$self}{'http_version'};
if (@_) {
my $v = shift;
$v = "1.0" if $v eq "1"; # float
unless ($v eq "1.0" or $v eq "1.1") {
require Carp;
Carp::croak("Unsupported HTTP version '$v'");
}
${*$self}{'http_version'} = $v;
}
$old;
}
sub format_request {
my $self = shift;
my $method = shift;
my $uri = shift;
my $content = (@_ % 2) ? pop : "";
for ($method, $uri) {
require Carp;
Carp::croak("Bad method or uri") if /\s/ || !length;
}
push(@{${*$self}{'http_request_method'}}, $method);
my $ver = ${*$self}{'http_version'};
my $peer_ver = ${*$self}{'http_peer_http_version'} || "1.0";
my @h;
my @connection;
my %given = (host => 0, "content-length" => 0, "te" => 0);
while (@_) {
my($k, $v) = splice(@_, 0, 2);
my $lc_k = lc($k);
if ($lc_k eq "connection") {
$v =~ s/^\s+//;
$v =~ s/\s+$//;
push(@connection, split(/\s*,\s*/, $v));
next;
}
if (exists $given{$lc_k}) {
$given{$lc_k}++;
}
push(@h, "$k: $v");
}
if (length($content) && !$given{'content-length'}) {
push(@h, "Content-Length: " . length($content));
}
my @h2;
if ($given{te}) {
push(@connection, "TE") unless grep lc($_) eq "te", @connection;
}
elsif ($self->send_te && gunzip_ok()) {
# gzip is less wanted since the IO::Uncompress::Gunzip interface for
# it does not really allow chunked decoding to take place easily.
push(@h2, "TE: deflate,gzip;q=0.3");
push(@connection, "TE");
}
unless (grep lc($_) eq "close", @connection) {
if ($self->keep_alive) {
if ($peer_ver eq "1.0") {
# from looking at Netscape's headers
push(@h2, "Keep-Alive: 300");
unshift(@connection, "Keep-Alive");
}
}
else {
push(@connection, "close") if $ver ge "1.1";
}
}
push(@h2, "Connection: " . join(", ", @connection)) if @connection;
unless ($given{host}) {
my $h = ${*$self}{'http_host'};
push(@h2, "Host: $h") if $h;
}
return _bytes(join($CRLF, "$method $uri HTTP/$ver", @h2, @h, "", $content));
}
sub write_request {
my $self = shift;
$self->print($self->format_request(@_));
}
sub format_chunk {
my $self = shift;
return $_[0] unless defined($_[0]) && length($_[0]);
return _bytes(sprintf("%x", length($_[0])) . $CRLF . $_[0] . $CRLF);
}
sub write_chunk {
my $self = shift;
return 1 unless defined($_[0]) && length($_[0]);
$self->print(_bytes(sprintf("%x", length($_[0])) . $CRLF . $_[0] . $CRLF));
}
sub format_chunk_eof {
my $self = shift;
my @h;
while (@_) {
push(@h, sprintf "%s: %s$CRLF", splice(@_, 0, 2));
}
return _bytes(join("", "0$CRLF", @h, $CRLF));
}
sub write_chunk_eof {
my $self = shift;
$self->print($self->format_chunk_eof(@_));
}
sub my_read {
die if @_ > 3;
my $self = shift;
my $len = $_[1];
for (${*$self}{'http_buf'}) {
if (length) {
$_[0] = substr($_, 0, $len, "");
return length($_[0]);
}
else {
die "read timeout" unless $self->can_read;
return $self->sysread($_[0], $len);
}
}
}
sub my_readline {
my $self = shift;
my $what = shift;
for (${*$self}{'http_buf'}) {
my $max_line_length = ${*$self}{'http_max_line_length'};
my $pos;
while (1) {
# find line ending
$pos = index($_, "\012");
last if $pos >= 0;
die "$what line too long (limit is $max_line_length)"
if $max_line_length && length($_) > $max_line_length;
# need to read more data to find a line ending
READ:
{
die "read timeout" unless $self->can_read;
my $n = $self->sysread($_, 1024, length);
unless (defined $n) {
redo READ if $!{EINTR} || $!{EAGAIN};
# if we have already accumulated some data let's at least
# return that as a line
die "$what read failed: $!" unless length;
}
unless ($n) {
return undef unless length;
return substr($_, 0, length, "");
}
}
}
die "$what line too long ($pos; limit is $max_line_length)"
if $max_line_length && $pos > $max_line_length;
my $line = substr($_, 0, $pos+1, "");
$line =~ s/(\015?\012)\z// || die "Assert";
return wantarray ? ($line, $1) : $line;
}
}
sub can_read {
my $self = shift;
return 1 unless defined(fileno($self));
return 1 if $self->isa('IO::Socket::SSL') && $self->pending;
# With no timeout, wait forever. An explict timeout of 0 can be
# used to just check if the socket is readable without waiting.
my $timeout = @_ ? shift : (${*$self}{io_socket_timeout} || undef);
my $fbits = '';
vec($fbits, fileno($self), 1) = 1;
SELECT:
{
my $before;
$before = time if $timeout;
my $nfound = select($fbits, undef, undef, $timeout);
if ($nfound < 0) {
if ($!{EINTR} || $!{EAGAIN}) {
# don't really think EAGAIN can happen here
if ($timeout) {
$timeout -= time - $before;
$timeout = 0 if $timeout < 0;
}
redo SELECT;
}
die "select failed: $!";
}
return $nfound > 0;
}
}
sub _rbuf {
my $self = shift;
if (@_) {
for (${*$self}{'http_buf'}) {
my $old;
$old = $_ if defined wantarray;
$_ = shift;
return $old;
}
}
else {
return ${*$self}{'http_buf'};
}
}
sub _rbuf_length {
my $self = shift;
return length ${*$self}{'http_buf'};
}
sub _read_header_lines {
my $self = shift;
my $junk_out = shift;
my @headers;
my $line_count = 0;
my $max_header_lines = ${*$self}{'http_max_header_lines'};
while (my $line = my_readline($self, 'Header')) {
if ($line =~ /^(\S+?)\s*:\s*(.*)/s) {
push(@headers, $1, $2);
}
elsif (@headers && $line =~ s/^\s+//) {
$headers[-1] .= " " . $line;
}
elsif ($junk_out) {
push(@$junk_out, $line);
}
else {
die "Bad header: '$line'\n";
}
if ($max_header_lines) {
$line_count++;
if ($line_count >= $max_header_lines) {
die "Too many header lines (limit is $max_header_lines)";
}
}
}
return @headers;
}
sub read_response_headers {
my($self, %opt) = @_;
my $laxed = $opt{laxed};
my($status, $eol) = my_readline($self, 'Status');
unless (defined $status) {
die "Server closed connection without sending any data back";
}
my($peer_ver, $code, $message) = split(/\s+/, $status, 3);
if (!$peer_ver || $peer_ver !~ s,^HTTP/,, || $code !~ /^[1-5]\d\d$/) {
die "Bad response status line: '$status'" unless $laxed;
# assume HTTP/0.9
${*$self}{'http_peer_http_version'} = "0.9";
${*$self}{'http_status'} = "200";
substr(${*$self}{'http_buf'}, 0, 0) = $status . ($eol || "");
return 200 unless wantarray;
return (200, "Assumed OK");
};
${*$self}{'http_peer_http_version'} = $peer_ver;
${*$self}{'http_status'} = $code;
my $junk_out;
if ($laxed) {
$junk_out = $opt{junk_out} || [];
}
my @headers = $self->_read_header_lines($junk_out);
# pick out headers that read_entity_body might need
my @te;
my $content_length;
for (my $i = 0; $i < @headers; $i += 2) {
my $h = lc($headers[$i]);
if ($h eq 'transfer-encoding') {
my $te = $headers[$i+1];
$te =~ s/^\s+//;
$te =~ s/\s+$//;
push(@te, $te) if length($te);
}
elsif ($h eq 'content-length') {
# ignore bogus and overflow values
if ($headers[$i+1] =~ /^\s*(\d{1,15})(?:\s|$)/) {
$content_length = $1;
}
}
}
${*$self}{'http_te'} = join(",", @te);
${*$self}{'http_content_length'} = $content_length;
${*$self}{'http_first_body'}++;
delete ${*$self}{'http_trailers'};
return $code unless wantarray;
return ($code, $message, @headers);
}
sub read_entity_body {
my $self = shift;
my $buf_ref = \$_[0];
my $size = $_[1];
die "Offset not supported yet" if $_[2];
my $chunked;
my $bytes;
if (${*$self}{'http_first_body'}) {
${*$self}{'http_first_body'} = 0;
delete ${*$self}{'http_chunked'};
delete ${*$self}{'http_bytes'};
my $method = shift(@{${*$self}{'http_request_method'}});
my $status = ${*$self}{'http_status'};
if ($method eq "HEAD") {
# this response is always empty regardless of other headers
$bytes = 0;
}
elsif (my $te = ${*$self}{'http_te'}) {
my @te = split(/\s*,\s*/, lc($te));
die "Chunked must be last Transfer-Encoding '$te'"
unless pop(@te) eq "chunked";
pop(@te) while @te && $te[-1] eq "chunked"; # ignore repeated chunked spec
for (@te) {
if ($_ eq "deflate" && inflate_ok()) {
#require Compress::Raw::Zlib;
my ($i, $status) = Compress::Raw::Zlib::Inflate->new();
die "Can't make inflator: $status" unless $i;
$_ = sub { my $out; $i->inflate($_[0], \$out); $out }
}
elsif ($_ eq "gzip" && gunzip_ok()) {
#require IO::Uncompress::Gunzip;
my @buf;
$_ = sub {
push(@buf, $_[0]);
return "" unless $_[1];
my $input = join("", @buf);
my $output;
IO::Uncompress::Gunzip::gunzip(\$input, \$output, Transparent => 0)
or die "Can't gunzip content: $IO::Uncompress::Gunzip::GunzipError";
return \$output;
};
}
elsif ($_ eq "identity") {
$_ = sub { $_[0] };
}
else {
die "Can't handle transfer encoding '$te'";
}
}
@te = reverse(@te);
${*$self}{'http_te2'} = @te ? \@te : "";
$chunked = -1;
}
elsif (defined(my $content_length = ${*$self}{'http_content_length'})) {
$bytes = $content_length;
}
elsif ($status =~ /^(?:1|[23]04)/) {
# RFC 2616 says that these responses should always be empty
# but that does not appear to be true in practice [RT#17907]
$bytes = 0;
}
else {
# XXX Multi-Part types are self delimiting, but RFC 2616 says we
# only has to deal with 'multipart/byteranges'
# Read until EOF
}
}
else {
$chunked = ${*$self}{'http_chunked'};
$bytes = ${*$self}{'http_bytes'};
}
if (defined $chunked) {
# The state encoded in $chunked is:
# $chunked == 0: read CRLF after chunk, then chunk header
# $chunked == -1: read chunk header
# $chunked > 0: bytes left in current chunk to read
if ($chunked <= 0) {
my $line = my_readline($self, 'Entity body');
if ($chunked == 0) {
die "Missing newline after chunk data: '$line'"
if !defined($line) || $line ne "";
$line = my_readline($self, 'Entity body');
}
die "EOF when chunk header expected" unless defined($line);
my $chunk_len = $line;
$chunk_len =~ s/;.*//; # ignore potential chunk parameters
unless ($chunk_len =~ /^([\da-fA-F]+)\s*$/) {
die "Bad chunk-size in HTTP response: $line";
}
$chunked = hex($1);
${*$self}{'http_chunked'} = $chunked;
if ($chunked == 0) {
${*$self}{'http_trailers'} = [$self->_read_header_lines];
$$buf_ref = "";
my $n = 0;
if (my $transforms = delete ${*$self}{'http_te2'}) {
for (@$transforms) {
$$buf_ref = &$_($$buf_ref, 1);
}
$n = length($$buf_ref);
}
# in case somebody tries to read more, make sure we continue
# to return EOF
delete ${*$self}{'http_chunked'};
${*$self}{'http_bytes'} = 0;
return $n;
}
}
my $n = $chunked;
$n = $size if $size && $size < $n;
$n = my_read($self, $$buf_ref, $n);
return undef unless defined $n;
${*$self}{'http_chunked'} = $chunked - $n;
if ($n > 0) {
if (my $transforms = ${*$self}{'http_te2'}) {
for (@$transforms) {
$$buf_ref = &$_($$buf_ref, 0);
}
$n = length($$buf_ref);
$n = -1 if $n == 0;
}
}
return $n;
}
elsif (defined $bytes) {
unless ($bytes) {
$$buf_ref = "";
return 0;
}
my $n = $bytes;
$n = $size if $size && $size < $n;
$n = my_read($self, $$buf_ref, $n);
${*$self}{'http_bytes'} = defined $n ? $bytes - $n : $bytes;
return $n;
}
else {
# read until eof
$size ||= 8*1024;
return my_read($self, $$buf_ref, $size);
}
}
sub get_trailers {
my $self = shift;
@{${*$self}{'http_trailers'} || []};
}
BEGIN {
my $gunzip_ok;
my $inflate_ok;
sub gunzip_ok {
return $gunzip_ok if defined $gunzip_ok;
# Try to load IO::Uncompress::Gunzip.
local $@;
local $SIG{__DIE__};
$gunzip_ok = 0;
eval {
require IO::Uncompress::Gunzip;
$gunzip_ok++;
};
return $gunzip_ok;
}
sub inflate_ok {
return $inflate_ok if defined $inflate_ok;
# Try to load Compress::Raw::Zlib.
local $@;
local $SIG{__DIE__};
$inflate_ok = 0;
eval {
require Compress::Raw::Zlib;
$inflate_ok++;
};
return $inflate_ok;
}
} # BEGIN
1;
./BlackJoker Mini Shell 1.0