summaryrefslogtreecommitdiffstats
path: root/Bugzilla/WebService/Server/XMLRPC.pm
blob: c85614f7ad3a401b2646e101bf75b7b96330b121 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# Contributor(s): Marc Schumann <wurblzap@gmail.com>
#                 Max Kanat-Alexander <mkanat@bugzilla.org>
#                 Rosie Clarkson <rosie.clarkson@planningportal.gov.uk>
#                 
# Portions © Crown copyright 2009 - Rosie Clarkson (development@planningportal.gov.uk) for the Planning Portal

package Bugzilla::WebService::Server::XMLRPC;

use strict;
use XMLRPC::Transport::HTTP;
use Bugzilla::WebService::Server;
our @ISA = qw(XMLRPC::Transport::HTTP::CGI Bugzilla::WebService::Server);

use Bugzilla::WebService::Constants;

sub initialize {
    my $self = shift;
    my %retval = $self->SUPER::initialize(@_);
    $retval{'serializer'}   = Bugzilla::XMLRPC::Serializer->new;
    $retval{'deserializer'} = Bugzilla::XMLRPC::Deserializer->new;
    $retval{'dispatch_with'} = WS_DISPATCH;
    return %retval;
}

sub make_response {
    my $self = shift;

    $self->SUPER::make_response(@_);

    # XMLRPC::Transport::HTTP::CGI doesn't know about Bugzilla carrying around
    # its cookies in Bugzilla::CGI, so we need to copy them over.
    foreach (@{Bugzilla->cgi->{'Bugzilla_cookie_list'}}) {
        $self->response->headers->push_header('Set-Cookie', $_);
    }
}

sub handle_login {
    my ($self, $classes, $action, $uri, $method) = @_;
    my $class = $classes->{$uri};
    my $full_method = $uri . "." . $method;
    $self->SUPER::handle_login($class, $method, $full_method);
    return;
}

1;

# This exists to validate input parameters (which XMLRPC::Lite doesn't do)
# and also, in some cases, to more-usefully decode them.
package Bugzilla::XMLRPC::Deserializer;
use strict;
# We can't use "use base" because XMLRPC::Serializer doesn't return
# a true value.
eval { require XMLRPC::Lite; };
our @ISA = qw(XMLRPC::Deserializer);

use Bugzilla::Error;

# Some method arguments need to be converted in some way, when they are input.
sub decode_value {
    my $self = shift;
    my ($type) = @{ $_[0] };
    my $value = $self->SUPER::decode_value(@_);
    
    # We only validate/convert certain types here.
    return $value if $type !~ /^(?:int|i4|boolean|double|dateTime\.iso8601)$/;
    
    # Though the XML-RPC standard doesn't allow an empty <int>,
    # <double>,or <dateTime.iso8601>,  we do, and we just say
    # "that's undef".
    if (grep($type eq $_, qw(int double dateTime))) {
        return undef if $value eq '';
    }
    
    my $validator = $self->_validation_subs->{$type};
    if (!$validator->($value)) {
        ThrowUserError('xmlrpc_invalid_value',
                       { type => $type, value => $value });
    }
    
    # We convert dateTimes to a DB-friendly date format.
    if ($type eq 'dateTime.iso8601') {
        # We leave off the $ from the end of this regex to allow for possible
        # extensions to the XML-RPC date standard.
        $value =~ /^(\d{4})(\d{2})(\d{2})T(\d{2}):(\d{2}):(\d{2})/;
        $value = "$1-$2-$3 $4:$5:$6";
    }

    return $value;
}

sub _validation_subs {
    my $self = shift;
    return $self->{_validation_subs} if $self->{_validation_subs};
    # The only place that XMLRPC::Lite stores any sort of validation
    # regex is in XMLRPC::Serializer. We want to re-use those regexes here.
    my $lookup = Bugzilla::XMLRPC::Serializer->new->typelookup;
    
    # $lookup is a hash whose values are arrayrefs, and whose keys are the
    # names of types. The second item of each arrayref is a subroutine
    # that will do our validation for us.
    my %validators = map { $_ => $lookup->{$_}->[1] } (keys %$lookup);
    # Add a boolean validator
    $validators{'boolean'} = sub {$_[0] =~ /^[01]$/};
    # Some types have multiple names, or have a different name in
    # XMLRPC::Serializer than their standard XML-RPC name.
    $validators{'dateTime.iso8601'} = $validators{'dateTime'};
    $validators{'i4'} = $validators{'int'};
    
    $self->{_validation_subs} = \%validators;
    return \%validators;
}

1;

# This package exists to fix a UTF-8 bug in SOAP::Lite.
# See http://rt.cpan.org/Public/Bug/Display.html?id=32952.
package Bugzilla::XMLRPC::Serializer;
use Scalar::Util qw(blessed);
use strict;
# We can't use "use base" because XMLRPC::Serializer doesn't return
# a true value.
eval { require XMLRPC::Lite; };
our @ISA = qw(XMLRPC::Serializer);

sub new {
    my $class = shift;
    my $self = $class->SUPER::new(@_);
    # This fixes UTF-8.
    $self->{'_typelookup'}->{'base64'} =
        [10, sub { !utf8::is_utf8($_[0]) && $_[0] =~ /[^\x09\x0a\x0d\x20-\x7f]/},
        'as_base64'];
    # This makes arrays work right even though we're a subclass.
    # (See http://rt.cpan.org//Ticket/Display.html?id=34514)
    $self->{'_encodingStyle'} = '';
    return $self;
}

# Here the XMLRPC::Serializer is extended to use the XMLRPC nil extension.
sub encode_object {
    my $self = shift;
    my @encoded = $self->SUPER::encode_object(@_);

    return $encoded[0]->[0] eq 'nil'
        ? ['value', {}, [@encoded]]
        : @encoded;
}

# Removes undefined values so they do not produce invalid XMLRPC.
sub envelope {
    my $self = shift;
    my ($type, $method, $data) = @_;
    # If the type isn't a successful response we don't want to change the values.
    if ($type eq 'response'){
        $data = _strip_undefs($data);
    }
    return $self->SUPER::envelope($type, $method, $data);
}

# In an XMLRPC response we have to handle hashes of arrays, hashes, scalars,
# Bugzilla objects (reftype = 'HASH') and XMLRPC::Data objects.
# The whole XMLRPC::Data object must be removed if its value key is undefined
# so it cannot be recursed like the other hash type objects.
sub _strip_undefs {
    my ($initial) = @_;
    if (ref $initial eq "HASH" || (blessed $initial && $initial->isa("HASH"))) {
        while (my ($key, $value) = each(%$initial)) {
            if ( !defined $value
                 || (blessed $value && $value->isa('XMLRPC::Data') && !defined $value->value) )
            {
                # If the value is undefined remove it from the hash.
                delete $initial->{$key};
            }
            else {
                $initial->{$key} = _strip_undefs($value);
            }
        }
    }
    if (ref $initial eq "ARRAY" || (blessed $initial && $initial->isa("ARRAY"))) {
        for (my $count = 0; $count < scalar @{$initial}; $count++) {
            my $value = $initial->[$count];
            if ( !defined $value
                 || (blessed $value && $value->isa('XMLRPC::Data') && !defined $value->value) )
            {
                # If the value is undefined remove it from the array.
                splice(@$initial, $count, 1);
                $count--;
            }
            else {
                $initial->[$count] = _strip_undefs($value);
            }
        }
    }
    return $initial;
}

sub BEGIN {
    no strict 'refs';
    for my $type (qw(double i4 int dateTime)) {
        my $method = 'as_' . $type;
        *$method = sub {
            my ($self, $value) = @_;
            if (!defined($value)) {
                return as_nil();
            }
            else {
                my $super_method = "SUPER::$method"; 
                return $self->$super_method($value);
            }
        }
    }
}

sub as_nil {
    return ['nil', {}];
}

1;

__END__

=head1 NAME

Bugzilla::WebService::Server::XMLRPC - The XML-RPC Interface to Bugzilla

=head1 DESCRIPTION

This documentation describes things about the Bugzilla WebService that
are specific to XML-RPC. For a general overview of the Bugzilla WebServices,
see L<Bugzilla::WebService>.

=head1 XML-RPC

The XML-RPC standard is described here: L<http://www.xmlrpc.com/spec>

=head1 CONNECTING

The endpoint for the XML-RPC interface is the C<xmlrpc.cgi> script in
your Bugzilla installation. For example, if your Bugzilla is at
C<bugzilla.yourdomain.com>, then your XML-RPC client would access the
API via: C<http://bugzilla.yourdomain.com/xmlrpc.cgi>

=head1 PARAMETERS

C<dateTime> fields are the standard C<dateTime.iso8601> XML-RPC field. They
should be in C<YYYY-MM-DDTHH:MM:SS> format (where C<T> is a literal T).

All other fields are standard XML-RPC types.

=head2 How XML-RPC WebService Methods Take Parameters

All functions take a single argument, a C<< <struct> >> that contains all parameters.
The names of the parameters listed in the API docs for each function are the
C<< <name> >> element for the struct C<< <member> >>s.

=head1 EXTENSIONS TO THE XML-RPC STANDARD

=head2 Undefined Values

Normally, XML-RPC does not allow empty values for C<int>, C<double>, or
C<dateTime.iso8601> fields. Bugzilla does--it treats empty values as
C<undef> (called C<NULL> or C<None> in some programming languages).

Bugzilla also accepts an element called C<< <nil> >>, as specified by the
XML-RPC extension here: L<http://ontosys.com/xml-rpc/extensions.php>, which
is always considered to be C<undef>, no matter what it contains.

Bugzilla does not use C<< <nil> >> values in returned data, because currently
most clients do not support C<< <nil> >>. Instead, any fields with C<undef>
values will be stripped from the response completely. Therefore
B<the client must handle the fact that some expected fields may not be 
returned>.

=begin private

nil is implemented by XMLRPC::Lite, in XMLRPC::Deserializer::decode_value
in the CPAN SVN since 14th Dec 2008
L<http://rt.cpan.org/Public/Bug/Display.html?id=20569> and in Fedora's
perl-SOAP-Lite package in versions 0.68-1 and above.

=end private