File Coverage

blib/lib/Dancer/Request.pm

Criterion	Covered	Total	%
statement	336	354	94.9
branch	106	138	76.8
condition	51	67	76.1
subroutine	69	71	97.1
pod	37	37	100.0
total	599	667	89.8

package Dancer::Request;
our $AUTHORITY = 'cpan:SUKRIA';
#ABSTRACT: interface for accessing incoming requests
$Dancer::Request::VERSION = '1.3521';
use strict;
use warnings;
use Carp;

use base 'Dancer::Object';

use Dancer::Config 'setting';
use Dancer::Request::Upload;
use Dancer::SharedData;
use Dancer::Session;
use Dancer::Exception qw(:all);
use Encode;
use HTTP::Body;
use URI;
use URI::Escape;

my @http_env_keys = (
    'user_agent',      'accept_language', 'accept_charset',
    'accept_encoding', 'keep_alive', 'connection',      'accept',
    'accept_type',     'referer',  #'host', managed manually
);
my $count = 0;

__PACKAGE__->attributes(

    # query
    'env',          'path',    'method',
    'content_type', 'content_length',
    'id',
    'uploads',      'headers', 'path_info',
    'ajax',         'is_forward',
    @http_env_keys,
);

sub new {
    my ($self, @args) = @_;
    if (@args == 1) {
        @args = ('env' => $args[0]);
        Dancer::Deprecation->deprecated(
                      fatal   => 1,
                      feature => 'Calling Dancer::Request->new($env)',
                      version => 1.3059,
                      reason  => 'Please use Dancer::Request->new( env => $env ) instead',
         );
    }
    $self->SUPER::new(@args);
}

# aliases
sub agent                 { $_[0]->user_agent }
sub remote_address        { $_[0]->address }
sub forwarded_for_address { $_[0]->env->{'X_FORWARDED_FOR'} || $_[0]->env->{'HTTP_X_FORWARDED_FOR'} }
sub address {
    setting('behind_proxy')
        ? $_[0]->forwarded_for_address()
        : $_[0]->env->{REMOTE_ADDR}
}
sub host {
    if (@_==2) {
        $_[0]->{host} = $_[1];
    } else {
        my $host;
        $host = ($_[0]->env->{X_FORWARDED_HOST} || $_[0]->env->{HTTP_X_FORWARDED_HOST}) if setting('behind_proxy');
        $host || $_[0]->{host} || $_[0]->env->{HTTP_HOST};
    }
}
sub remote_host           { $_[0]->env->{REMOTE_HOST} }
sub protocol              { $_[0]->env->{SERVER_PROTOCOL} }
sub port                  { $_[0]->env->{SERVER_PORT} }
sub request_uri           { $_[0]->env->{REQUEST_URI} }
sub user                  { $_[0]->env->{REMOTE_USER} }
sub script_name           { $_[0]->env->{SCRIPT_NAME} }
sub request_base          { $_[0]->env->{REQUEST_BASE} || $_[0]->env->{HTTP_REQUEST_BASE} }
sub scheme                {
    my $scheme;
    if (setting('behind_proxy')) {
        # PSGI specs say that X_FORWARDED_PROTO will
        # be converted into HTTP_X_FORWARDED_PROTO
        # but Dancer::Test doesn't use PSGI (for now)
        $scheme = $_[0]->env->{'HTTP_X_FORWARDED_PROTO'}
               || $_[0]->env->{'X_FORWARDED_PROTOCOL'}
               || $_[0]->env->{'HTTP_X_FORWARDED_PROTOCOL'}
               || $_[0]->env->{'HTTP_FORWARDED_PROTO'}
               || $_[0]->env->{'X_FORWARDED_PROTO'}
               || ""
    }
    return $scheme
        || $_[0]->env->{'psgi.url_scheme'}
        || $_[0]->env->{'PSGI.URL_SCHEME'}
        || "";
}
sub secure                { $_[0]->scheme eq 'https' }
sub uri                   { $_[0]->request_uri }

sub is_head               { $_[0]->{method} eq 'HEAD' }
sub is_post               { $_[0]->{method} eq 'POST' }
sub is_get                { $_[0]->{method} eq 'GET' }
sub is_put                { $_[0]->{method} eq 'PUT' }
sub is_delete             { $_[0]->{method} eq 'DELETE' }
sub is_patch              { $_[0]->{method} eq 'PATCH' }
sub header                { $_[0]->{headers}->header($_[1]) }

# We used to store the whole raw unparsed body; this was a big problem for large
# file uploads (Issue 1129).
# The original fix was to stop doing so, and replace the accessor with one that
# would read it out of the temp file returned by HTTP::Body->body - but that
# doesn't work for e.g. parsed form submissions, only certain types.
# So, back to the older way - we may have a request body squirreled away
# in memory if the config included the raw_request_body_in_ram boolean
sub body { $_[0]->{body} }

# public interface compat with CGI.pm objects
sub request_method { method(@_) }
sub Vars           { params(@_) }
sub input_handle   { $_[0]->env->{'psgi.input'} || $_[0]->env->{'PSGI.INPUT'} }

sub init {
    my ($self) = @_;

    $self->{env}          ||= {};
    $self->{path}           = undef;
    $self->{method}         = undef;
    $self->{params}         = {};
    $self->{is_forward}     ||= 0;
    $self->{content_length} = $self->env->{CONTENT_LENGTH} || 0;
    $self->{content_type}   = $self->env->{CONTENT_TYPE} || '';
    $self->{id}             = ++$count;
    $self->{_chunk_size}    = 4096;
    $self->{_read_position} = 0;
    $self->{_body_params}   = undef;
    $self->{_query_params}  = undef;
    $self->{_route_params}  = {};

    $self->_build_headers();
    $self->_build_request_env();
    $self->_build_path()      unless $self->path;
    $self->_build_path_info() unless $self->path_info;
    $self->_build_method()    unless $self->method;

    $self->{_http_body}
        = HTTP::Body->new($self->content_type, $self->content_length);
    $self->{_http_body}->cleanup(1);
    $self->{body} = ''; # default, because we might not store it now.
    $self->_build_params();
    $self->_build_uploads unless $self->uploads;
    $self->{ajax} = $self->is_ajax;

    return $self;
}

sub to_string {
    my ($self) = @_;
    return "[#" . $self->id . "] " . $self->method . " " . $self->path;
}

# helper for building a request object by hand
# with the given method, path, params, body and headers.
sub new_for_request {
    my ($class, $method, $uri, $params, $body, $headers, $extra_env) = @_;
    $params    ||= {};
    $extra_env ||= {};
    $method = uc($method);

    my ( $path, $query_string ) = ( $uri =~ /([^?]*)(?:\?(.*))?/s ); #from HTTP::Server::Simple

    my $env = {
        %ENV,
        %{$extra_env},
        PATH_INFO      => $path,
        QUERY_STRING   => $query_string || $ENV{QUERY_STRING} || '',
        REQUEST_METHOD => $method
    };
    $env->{CONTENT_LENGTH} = defined($body) ? length($body) : 0 if !exists $env->{CONTENT_LENGTH};
    my $req = $class->new(env => $env);
    $req->{params}        = {%{$req->{params}}, %{$params}};
    $req->_build_params();
    $req->{_query_params} = $req->{params};
    my $store_raw_body = setting('raw_request_body_in_ram');
    $store_raw_body = defined $store_raw_body ? $store_raw_body : 1;
    if ($store_raw_body) {
        $req->{body} = $body;
    }
    $req->{headers}       = $headers || HTTP::Headers->new;

    return $req;
}

#Create a new request which is a clone of the current one, apart
#from the path location, which points instead to the new location
sub forward {
    my ($class, $request, $to_data) = @_;

    my $env = $request->env;
    $env->{PATH_INFO} = $to_data->{to_url};

    my $new_request = $class->new(env => $env, is_forward => 1);
    my $new_params  = _merge_params(scalar($request->params),
                                    $to_data->{params} || {});

    if (exists($to_data->{options}{method})) {
        die unless _valid_method($to_data->{options}{method});
        $new_request->{method} = uc $to_data->{options}{method};
    }

    $new_request->{params}  = $new_params;
    $new_request->{_body_params}  = $request->{_body_params};
    $new_request->{_query_params} = $request->{_query_params};
    $new_request->{_route_params} = $request->{_route_params};
    $new_request->{_params_are_decoded} = 1;
    $new_request->{headers} = $request->headers;

    if( my $session = Dancer::Session->engine
                      && Dancer::Session->get_current_session ) {
        my $name = $session->session_name;

        # make sure that COOKIE is populated
        $new_request->{env}{COOKIE} ||= $new_request->{env}{HTTP_COOKIE};

        no warnings;  # COOKIE can be undef
        unless ( $new_request->{env}{COOKIE} =~ /$name\s*=/ ) {
            $new_request->{env}{COOKIE} = join ';',
                grep { $_ }
                $new_request->{env}{COOKIE},
                join '=', $name, Dancer::Session->get_current_session->id;
        }
    }

    $new_request->{uploads} = $request->uploads;

    return $new_request;
}

sub _valid_method {
    my $method = shift;
    return $method =~ /^(?:head|post|get|put|delete)$/i;
}

sub _merge_params {
    my ($params, $to_add) = @_;

    die unless ref $to_add eq "HASH";
    for my $key (keys %$to_add) {
        $params->{$key} = $to_add->{$key};
    }
    return $params;
}

sub base {
    my $self = shift;
    my $uri  = $self->_common_uri;

    return $uri->canonical;
}

sub _common_uri {
    my $self = shift;

    my $path   = $self->env->{SCRIPT_NAME} || '';
    my $port   = $self->env->{SERVER_PORT};
    my $server = $self->env->{SERVER_NAME};
    my $host   = $self->host;
    my $scheme = $self->scheme;

    my $uri = URI->new;
    $uri->scheme($scheme);
    $uri->authority($host || "$server:$port");
    if (setting('behind_proxy')) {
        my $request_base = $self->env->{REQUEST_BASE} || $self->env->{HTTP_REQUEST_BASE} || '';
        $uri->path($request_base . $path || '/');
    }
    else {
        $uri->path($path || '/');
    }

    return $uri;
}

sub uri_base {
    my $self  = shift;
    my $uri   = $self->_common_uri;
    my $canon = $uri->canonical;

    if ( $uri->path eq '/' ) {
        $canon =~ s{/$}{};
    }

    return $canon;
}

sub uri_for {
    my ($self, $part, $params, $dont_escape) = @_;
    my $uri = $self->base;

    # Make sure there's exactly one slash between the base and the new part
    my $base = $uri->path;
    $base =~ s|/$||;
    $part =~ s|^/||;
    $uri->path("$base/$part");

    $uri->query_form($params) if $params;

    return $dont_escape ? uri_unescape($uri->canonical) : $uri->canonical;
}

sub params {
    my ($self, $source) = @_;

    my @caller = caller;

    if (not $self->{_params_are_decoded}) {
        $self->{params}        = _decode($self->{params});
        $self->{_body_params}  = _decode($self->{_body_params});
        $self->{_query_params} = _decode($self->{_query_params});
        $self->{_route_params} = _decode($self->{_route_params});
        $self->{_params_are_decoded} = 1;
    }

    return %{$self->{params}} if wantarray && @_ == 1;
    return $self->{params} if @_ == 1;

    if ($source eq 'query') {
        return %{$self->{_query_params}} if wantarray;
        return $self->{_query_params};
    }
    elsif ($source eq 'body') {
        return %{$self->{_body_params}} if wantarray;
        return $self->{_body_params};
    }
    if ($source eq 'route') {
        return %{$self->{_route_params}} if wantarray;
        return $self->{_route_params};
    }
    else {
        raise core_request => "Unknown source params \"$source\".";
    }
}

sub _decode {
    my ($h) = @_;
    return if not defined $h;

    if (!ref($h) && !utf8::is_utf8($h)) {
        return decode('UTF-8', $h);
    }

    if (ref($h) eq 'HASH') {
        while (my ($k, $v) = each(%$h)) {
            $h->{$k} = _decode($v);
        }
        return $h;
    }

    if (ref($h) eq 'ARRAY') {
        return [ map { _decode($_) } @$h ];
    }

    return $h;
}

sub is_ajax {
    my $self = shift;

    # when using Plack::Builder headers are not set
    # so we're checking if it's actually there with PSGI plain headers
    if ( defined $self->{x_requested_with} ) {
        if ( $self->{x_requested_with} eq "XMLHttpRequest" ) {
            return 1;
        }
    }

    return 0 unless defined $self->headers;
    return 0 unless defined $self->header('X-Requested-With');
    return 0 if $self->header('X-Requested-With') ne 'XMLHttpRequest';
    return 1;
}

# context-aware accessor for uploads
sub upload {
    my ($self, $name) = @_;
    my $res = $self->{uploads}{$name};

    return $res unless wantarray;
    return ()   unless defined $res;
    return (ref($res) eq 'ARRAY') ? @$res : $res;
}

# Some Dancer's core components sometimes need to alter
# the parsed request params, these protected accessors are provided
# for this purpose
sub _set_route_params {
    my ($self, $params) = @_;
    $self->{_route_params} = $params;
    $self->_build_params();
}

sub _set_body_params {
    my ($self, $params) = @_;
    $self->{_body_params} = $params;
    $self->_build_params();
}

sub _set_query_params {
    my ($self, $params) = @_;
    $self->{_query_params} = $params;
    $self->_build_params();
}

sub _build_request_env {
    my ($self) = @_;

   # Don't refactor that, it's called whenever a request object is needed, that
   # means at least once per request. If refactored in a loop, this will cost 4
   # times more than the following static map.
    my $env = $self->env;
    $self->{user_agent}       = $env->{HTTP_USER_AGENT};
    $self->{host}             = $env->{HTTP_HOST};
    $self->{accept_language}  = $env->{HTTP_ACCEPT_LANGUAGE};
    $self->{accept_charset}   = $env->{HTTP_ACCEPT_CHARSET};
    $self->{accept_encoding}  = $env->{HTTP_ACCEPT_ENCODING};
    $self->{keep_alive}       = $env->{HTTP_KEEP_ALIVE};
    $self->{connection}       = $env->{HTTP_CONNECTION};
    $self->{accept}           = $env->{HTTP_ACCEPT};
    $self->{accept_type}      = $env->{HTTP_ACCEPT_TYPE};
    $self->{referer}          = $env->{HTTP_REFERER};
    $self->{x_requested_with} = $env->{HTTP_X_REQUESTED_WITH};
}

sub _build_headers {
    my ($self) = @_;
    $self->{headers} = Dancer::SharedData->headers;
}

sub _build_params {
    my ($self) = @_;

    # params may have been populated by before filters
    # _before_ we get there, so we have to save it first
    my $previous = $self->{params};

    # now parse environment params...
    $self->_parse_get_params();
    if ($self->is_forward) {
        $self->{_body_params} ||= {};
    } else {
        $self->_parse_post_params();
    }

    # and merge everything
    $self->{params} = {
        %$previous,                %{$self->{_query_params}},
        %{$self->{_route_params}}, %{$self->{_body_params}},
    };

}

# Written from PSGI specs:
# http://search.cpan.org/dist/PSGI/PSGI.pod
sub _build_path {
    my ($self) = @_;
    my $path = "";

    $path .= $self->script_name if defined $self->script_name;
    $path .= $self->env->{PATH_INFO} if defined $self->env->{PATH_INFO};

    # fallback to REQUEST_URI if nothing found
    # we have to decode it, according to PSGI specs.
    if (defined $self->request_uri) {
        $path ||= $self->_url_decode($self->request_uri);
    }

    raise core_request => "Cannot resolve path" if not $path;
    $self->{path} = $path;
}

sub _build_path_info {
    my ($self) = @_;
    my $info = $self->env->{PATH_INFO};
    if (defined $info) {

        # Empty path info will be interpreted as "root".
        $info ||= '/';
    }
    else {
        $info = $self->path;
    }
    $self->{path_info} = $info;
}

sub _build_method {
    my ($self) = @_;
    $self->{method} = $self->env->{REQUEST_METHOD}
      || $self->{request}->request_method();
}

sub _url_decode {
    my ($self, $encoded) = @_;
    my $clean = $encoded;
    $clean =~ tr/\+/ /;
    $clean =~ s/%([a-fA-F0-9]{2})/pack "H2", $1/eg;
    return $clean;
}

sub _parse_post_params {
    my ($self) = @_;
    return $self->{_body_params} if defined $self->{_body_params};

    $self->_read_to_end();
    $self->{_body_params} = $self->{_http_body}->param;
}

sub _parse_get_params {
    my ($self) = @_;
    return $self->{_query_params} if defined $self->{_query_params};
    $self->{_query_params} = {};

    my $source = $self->env->{QUERY_STRING} || '';
    foreach my $token (split /[&;]/, $source) {
        my ($key, $val) = split(/=/, $token, 2);
        next unless defined $key;
        $val = (defined $val) ? $val : '';
        $key = $self->_url_decode($key);
        $val = $self->_url_decode($val);

        # looking for multi-value params
        if (exists $self->{_query_params}{$key}) {
            my $prev_val = $self->{_query_params}{$key};
            if (ref($prev_val) && ref($prev_val) eq 'ARRAY') {
                push @{$self->{_query_params}{$key}}, $val;
            }
            else {
                $self->{_query_params}{$key} = [$prev_val, $val];
            }
        }

        # simple value param (first time we see it)
        else {
            $self->{_query_params}{$key} = $val;
        }
    }
    return $self->{_query_params};
}

sub _read_to_end {
    my $self = shift;

    return unless $self->_has_something_to_read;

    if ( $self->content_length > 0 ) {
        my $body = '';

        my $store_raw_body = setting('raw_request_body_in_ram');
        $store_raw_body = defined $store_raw_body ? $store_raw_body : 1;

        while ( my $buffer = $self->_read ) {
            $self->{_http_body}->add($buffer);

            # Only keep a copy of the raw request body in RAM if the user has
            # asked us to

            if ($store_raw_body) {
                $self->{body} .= $buffer;
            }
        }

    }

    return $self->{_http_body};
}

sub _has_something_to_read {
    defined $_[0]->input_handle;
}

# taken from Miyagawa's Plack::Request::BodyParser
sub _read {
    my ($self,)   = @_;
    my $remaining = $self->content_length - $self->{_read_position};
    my $maxlength = $self->{_chunk_size};

    return if ($remaining <= 0);

    my $readlen = ($remaining > $maxlength) ? $maxlength : $remaining;
    my $buffer;
    my $rc;

    $rc = $self->input_handle->read($buffer, $readlen);

    if (defined $rc) {
        $self->{_read_position} += $rc;
        return $buffer;
    }
    else {
        raise core_request => "Unknown error reading input: $!";
    }
}

# Taken gently from Plack::Request, thanks to Plack authors.
sub _build_uploads {
    my ($self) = @_;

    my $uploads = _decode($self->{_http_body}->upload);
    my %uploads;

    for my $name (keys %{$uploads}) {
        my $files = $uploads->{$name};
        $files = ref $files eq 'ARRAY' ? $files : [$files];

        my @uploads;
        for my $upload (@{$files}) {
            push(
                @uploads,
                Dancer::Request::Upload->new(
                    headers  => $upload->{headers},
                    tempname => $upload->{tempname},
                    size     => $upload->{size},
                    filename => $upload->{filename},
                )
            );
        }
        $uploads{$name} = @uploads > 1 ? \@uploads : $uploads[0];

        # support access to the filename as a normal param
        my @filenames = map { $_->{filename} } @uploads;
        $self->{_body_params}{$name} =
          @filenames > 1 ? \@filenames : $filenames[0];
    }

    $self->{uploads} = \%uploads;
    $self->_build_params();
}

1;

__END__