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https://github.com/percona/percona-toolkit.git
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Added HTTP::Micro.
This is an extremely stripped down HTTP::Tiny, i.e. not comformant with HTTP/1.1. Basically only GET and POST should work, and only for explicit content-lengths; chunking is not implemented.
This commit is contained in:
Brian Fraser fraserb@gmail.com
458
lib/HTTPMicro.pm
Normal file
458
lib/HTTPMicro.pm
Normal file
@@ -0,0 +1,458 @@
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package HTTP::Micro;
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BEGIN {
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$HTTP::Micro::VERSION = '0.001';
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}
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use strict;
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use warnings;
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# A stripped down version of HTTP::Tiny; but not a correct HTTP/1.1
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# implementation
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use Carp ();
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my @attributes;
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BEGIN {
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@attributes = qw(agent default_headers timeout);
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no strict 'refs';
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for my $accessor ( @attributes ) {
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*{$accessor} = sub {
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@_ > 1 ? $_[0]->{$accessor} = $_[1] : $_[0]->{$accessor};
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};
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}
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}
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sub new {
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my($class, %args) = @_;
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(my $agent = $class) =~ s{::}{-}g;
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my $self = {
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agent => $agent . "/" . ($class->VERSION || 0),
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timeout => 60,
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};
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for my $key ( @attributes ) {
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$self->{$key} = $args{$key} if exists $args{$key}
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}
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return bless $self, $class;
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}
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sub request {
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my ($self, $method, $url, $args) = @_;
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@_ == 3 || (@_ == 4 && ref $args eq 'HASH')
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or Carp::croak(q/Usage: $http->request(METHOD, URL, [HASHREF])/);
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$args ||= {}; # we keep some state in this during _request
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# RFC 2616 Section 8.1.4 mandates a single retry on broken socket
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my $response;
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for ( 0 .. 1 ) {
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$response = eval { $self->_request($method, $url, $args) };
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last unless $@ && $method eq 'GET'
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&& $@ =~ m{^(?:Socket closed|Unexpected end)};
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}
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if (my $e = "$@") {
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$response = {
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success => q{},
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status => 599,
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reason => 'Internal Exception',
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content => $e,
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headers => {
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'content-type' => 'text/plain',
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'content-length' => length $e,
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}
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};
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}
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return $response;
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}
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my %DefaultPort = (
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http => 80,
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https => 443,
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);
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sub _request {
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my ($self, $method, $url, $args) = @_;
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my ($scheme, $host, $port, $path_query) = $self->_split_url($url);
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my $request = {
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method => $method,
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scheme => $scheme,
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host_port => ($port == $DefaultPort{$scheme} ? $host : "$host:$port"),
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uri => $path_query,
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headers => {},
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};
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my $handle = HTTP::Micro::Handle->new(timeout => $self->{timeout});
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$handle->connect($scheme, $host, $port);
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$self->_prepare_headers_and_cb($request, $args);
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$handle->write_request_header(@{$request}{qw/method uri headers/});
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$handle->write_content_body($request) if $request->{content};
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my $response;
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do { $response = $handle->read_response_header }
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until (substr($response->{status},0,1) ne '1');
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if (!($method eq 'HEAD' || $response->{status} =~ /^[23]04/)) {
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$response->{content} = '';
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$handle->read_content_body(sub { $_[1]->{content} .= $_[0] }, $response);
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}
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$handle->close;
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$response->{success} = substr($response->{status},0,1) eq '2';
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return $response;
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}
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sub _prepare_headers_and_cb {
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my ($self, $request, $args) = @_;
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for ($self->{default_headers}, $args->{headers}) {
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next unless defined;
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while (my ($k, $v) = each %$_) {
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$request->{headers}{lc $k} = $v;
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}
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}
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$request->{headers}{'host'} = $request->{host_port};
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$request->{headers}{'connection'} = "close";
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$request->{headers}{'user-agent'} ||= $self->{agent};
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if (defined $args->{content}) {
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$request->{headers}{'content-type'} ||= "application/octet-stream";
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utf8::downgrade($args->{content}, 1)
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or Carp::croak(q/Wide character in request message body/);
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$request->{headers}{'content-length'} = length $args->{content};
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}
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return;
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}
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sub _split_url {
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my $url = pop;
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# URI regex adapted from the URI module
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my ($scheme, $authority, $path_query) = $url =~ m<\A([^:/?#]+)://([^/?#]*)([^#]*)>
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or Carp::croak(qq/Cannot parse URL: '$url'/);
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$scheme = lc $scheme;
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$path_query = "/$path_query" unless $path_query =~ m<\A/>;
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my $host = (length($authority)) ? lc $authority : 'localhost';
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$host =~ s/\A[^@]*@//; # userinfo
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my $port = do {
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$host =~ s/:([0-9]*)\z// && length $1
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? $1
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: ($scheme eq 'http' ? 80 : $scheme eq 'https' ? 443 : undef);
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};
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return ($scheme, $host, $port, $path_query);
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}
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package
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HTTP::Micro::Handle; # hide from PAUSE/indexers
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use strict;
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use warnings;
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use Carp qw[croak];
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use Errno qw[EINTR EPIPE];
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use IO::Socket qw[SOCK_STREAM];
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sub BUFSIZE () { 32768 }
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my $Printable = sub {
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local $_ = shift;
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s/\r/\\r/g;
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s/\n/\\n/g;
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s/\t/\\t/g;
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s/([^\x20-\x7E])/sprintf('\\x%.2X', ord($1))/ge;
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$_;
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};
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sub new {
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my ($class, %args) = @_;
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return bless {
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rbuf => '',
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timeout => 60,
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max_line_size => 16384,
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%args
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}, $class;
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}
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my $ssl_verify_args = {
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check_cn => "when_only",
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wildcards_in_alt => "anywhere",
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wildcards_in_cn => "anywhere"
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};
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sub connect {
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@_ == 4 || croak(q/Usage: $handle->connect(scheme, host, port)/);
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my ($self, $scheme, $host, $port) = @_;
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if ( $scheme eq 'https' ) {
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eval "require IO::Socket::SSL"
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unless exists $INC{'IO/Socket/SSL.pm'};
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croak(qq/IO::Socket::SSL must be installed for https support/)
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unless $INC{'IO/Socket/SSL.pm'};
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}
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elsif ( $scheme ne 'http' ) {
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croak(qq/Unsupported URL scheme '$scheme'/);
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}
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$self->{fh} = 'IO::Socket::INET'->new(
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PeerHost => $host,
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PeerPort => $port,
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Proto => 'tcp',
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Type => SOCK_STREAM,
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Timeout => $self->{timeout}
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) or croak(qq/Could not connect to '$host:$port': $@/);
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binmode($self->{fh})
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or croak(qq/Could not binmode() socket: '$!'/);
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if ( $scheme eq 'https') {
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IO::Socket::SSL->start_SSL($self->{fh});
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ref($self->{fh}) eq 'IO::Socket::SSL'
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or die(qq/SSL connection failed for $host\n/);
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$self->{fh}->verify_hostname( $host, $ssl_verify_args )
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or die(qq/SSL certificate not valid for $host\n/);
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}
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$self->{host} = $host;
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$self->{port} = $port;
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return $self;
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}
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sub close {
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@_ == 1 || croak(q/Usage: $handle->close()/);
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my ($self) = @_;
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CORE::close($self->{fh})
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or croak(qq/Could not close socket: '$!'/);
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}
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sub write {
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@_ == 2 || croak(q/Usage: $handle->write(buf)/);
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my ($self, $buf) = @_;
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my $len = length $buf;
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my $off = 0;
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local $SIG{PIPE} = 'IGNORE';
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while () {
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$self->can_write
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or croak(q/Timed out while waiting for socket to become ready for writing/);
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my $r = syswrite($self->{fh}, $buf, $len, $off);
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if (defined $r) {
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$len -= $r;
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$off += $r;
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last unless $len > 0;
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}
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elsif ($! == EPIPE) {
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croak(qq/Socket closed by remote server: $!/);
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}
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elsif ($! != EINTR) {
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croak(qq/Could not write to socket: '$!'/);
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}
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}
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return $off;
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}
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sub read {
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@_ == 2 || @_ == 3 || croak(q/Usage: $handle->read(len)/);
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my ($self, $len) = @_;
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my $buf = '';
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my $got = length $self->{rbuf};
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if ($got) {
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my $take = ($got < $len) ? $got : $len;
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$buf = substr($self->{rbuf}, 0, $take, '');
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$len -= $take;
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}
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while ($len > 0) {
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$self->can_read
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or croak(q/Timed out while waiting for socket to become ready for reading/);
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my $r = sysread($self->{fh}, $buf, $len, length $buf);
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if (defined $r) {
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last unless $r;
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$len -= $r;
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}
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elsif ($! != EINTR) {
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croak(qq/Could not read from socket: '$!'/);
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}
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}
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if ($len) {
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croak(q/Unexpected end of stream/);
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}
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return $buf;
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}
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sub readline {
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@_ == 1 || croak(q/Usage: $handle->readline()/);
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my ($self) = @_;
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while () {
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if ($self->{rbuf} =~ s/\A ([^\x0D\x0A]* \x0D?\x0A)//x) {
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return $1;
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}
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$self->can_read
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or croak(q/Timed out while waiting for socket to become ready for reading/);
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my $r = sysread($self->{fh}, $self->{rbuf}, BUFSIZE, length $self->{rbuf});
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if (defined $r) {
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last unless $r;
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}
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elsif ($! != EINTR) {
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croak(qq/Could not read from socket: '$!'/);
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}
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}
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croak(q/Unexpected end of stream while looking for line/);
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}
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sub read_header_lines {
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@_ == 1 || @_ == 2 || croak(q/Usage: $handle->read_header_lines([headers])/);
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my ($self, $headers) = @_;
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$headers ||= {};
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my $lines = 0;
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my $val;
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while () {
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my $line = $self->readline;
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if ($line =~ /\A ([^\x00-\x1F\x7F:]+) : [\x09\x20]* ([^\x0D\x0A]*)/x) {
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my ($field_name) = lc $1;
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$val = \($headers->{$field_name} = $2);
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}
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elsif ($line =~ /\A [\x09\x20]+ ([^\x0D\x0A]*)/x) {
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$val
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or croak(q/Unexpected header continuation line/);
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next unless length $1;
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$$val .= ' ' if length $$val;
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$$val .= $1;
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}
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elsif ($line =~ /\A \x0D?\x0A \z/x) {
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last;
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}
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else {
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croak(q/Malformed header line: / . $Printable->($line));
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}
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}
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return $headers;
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}
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sub write_header_lines {
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(@_ == 2 && ref $_[1] eq 'HASH') || croak(q/Usage: $handle->write_header_lines(headers)/);
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my($self, $headers) = @_;
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my $buf = '';
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while (my ($k, $v) = each %$headers) {
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my $field_name = lc $k;
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$field_name =~ /\A [\x21\x23-\x27\x2A\x2B\x2D\x2E\x30-\x39\x41-\x5A\x5E-\x7A\x7C\x7E]+ \z/x
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or croak(q/Invalid HTTP header field name: / . $Printable->($field_name));
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$field_name =~ s/\b(\w)/\u$1/g;
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$buf .= "$field_name: $v\x0D\x0A";
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}
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$buf .= "\x0D\x0A";
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return $self->write($buf);
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}
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sub read_content_body {
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@_ == 3 || @_ == 4 || croak(q/Usage: $handle->read_content_body(callback, response, [read_length])/);
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my ($self, $cb, $response, $len) = @_;
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$len ||= $response->{headers}{'content-length'};
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croak("No content-length in the returned response, and this "
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. "UA doesn't implement chunking") unless defined $len;
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while ($len > 0) {
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my $read = ($len > BUFSIZE) ? BUFSIZE : $len;
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$cb->($self->read($read), $response);
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$len -= $read;
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}
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return;
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}
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sub write_content_body {
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@_ == 2 || croak(q/Usage: $handle->write_content_body(request)/);
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my ($self, $request) = @_;
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my ($len, $content_length) = (0, $request->{headers}{'content-length'});
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$len += $self->write($request->{content});
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$len == $content_length
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or croak(qq/Content-Length missmatch (got: $len expected: $content_length)/);
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return $len;
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}
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sub read_response_header {
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@_ == 1 || croak(q/Usage: $handle->read_response_header()/);
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my ($self) = @_;
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my $line = $self->readline;
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$line =~ /\A (HTTP\/(0*\d+\.0*\d+)) [\x09\x20]+ ([0-9]{3}) [\x09\x20]+ ([^\x0D\x0A]*) \x0D?\x0A/x
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or croak(q/Malformed Status-Line: / . $Printable->($line));
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my ($protocol, $version, $status, $reason) = ($1, $2, $3, $4);
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return {
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status => $status,
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reason => $reason,
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headers => $self->read_header_lines,
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protocol => $protocol,
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};
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}
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sub write_request_header {
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@_ == 4 || croak(q/Usage: $handle->write_request_header(method, request_uri, headers)/);
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my ($self, $method, $request_uri, $headers) = @_;
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return $self->write("$method $request_uri HTTP/1.1\x0D\x0A")
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+ $self->write_header_lines($headers);
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}
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sub _do_timeout {
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my ($self, $type, $timeout) = @_;
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$timeout = $self->{timeout}
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unless defined $timeout && $timeout >= 0;
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my $fd = fileno $self->{fh};
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defined $fd && $fd >= 0
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or croak(q/select(2): 'Bad file descriptor'/);
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my $initial = time;
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my $pending = $timeout;
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my $nfound;
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vec(my $fdset = '', $fd, 1) = 1;
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while () {
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$nfound = ($type eq 'read')
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? select($fdset, undef, undef, $pending)
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: select(undef, $fdset, undef, $pending) ;
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if ($nfound == -1) {
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$! == EINTR
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or croak(qq/select(2): '$!'/);
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redo if !$timeout || ($pending = $timeout - (time - $initial)) > 0;
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$nfound = 0;
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}
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last;
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}
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$! = 0;
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return $nfound;
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}
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sub can_read {
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@_ == 1 || @_ == 2 || croak(q/Usage: $handle->can_read([timeout])/);
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my $self = shift;
|
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return $self->_do_timeout('read', @_)
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}
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sub can_write {
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@_ == 1 || @_ == 2 || croak(q/Usage: $handle->can_write([timeout])/);
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my $self = shift;
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return $self->_do_timeout('write', @_)
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}
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1;
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27
t/lib/HTTPMicro.t
Normal file
27
t/lib/HTTPMicro.t
Normal file
@@ -0,0 +1,27 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
BEGIN {
|
||||
die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
|
||||
unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
|
||||
unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
|
||||
};
|
||||
|
||||
use strict;
|
||||
use warnings FATAL => 'all';
|
||||
use English qw(-no_match_vars);
|
||||
use Test::More;
|
||||
|
||||
use HTTP::Tiny;
|
||||
use HTTPMicro;
|
||||
|
||||
my $test_url = "http://www.google.com";
|
||||
my $tiny = HTTP::Tiny->new(max_redirect => 0)->request('GET', $test_url);
|
||||
my $micro = HTTP::Micro->new->request('GET', $test_url);
|
||||
|
||||
is_deeply(
|
||||
$micro->{content},
|
||||
$tiny->{content},
|
||||
"HTTP::Micro behaves like HTTP::Tiny (with max_redirect) for $test_url"
|
||||
);
|
||||
|
||||
done_testing;
|
||||
Reference in New Issue
Block a user