/
Role.pm
158 lines (134 loc) · 4.53 KB
/
Role.pm
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use v6;
use URI;
use URI::Escape;
use MIME::Base64;
use JSON::Fast; # from-json
use Cache::LRU;
use HTTP::Request;
use HTTP::UserAgent;
use WebService::GitHub::Response;
class X::WebService::GitHub is Exception {
has $.reason;
method message()
{
"Error : $.reason";
}
}
role WebService::GitHub::Role {
has $.endpoint = 'https://api.github.com';
has $.access-token= %*ENV<GH_TOKEN>;
has $.auth_login;
has $.auth_password;
has $.useragent = 'perl6-WebService-GitHub/0.1.0';
has $.ua = HTTP::UserAgent.new;
has $.cache = Cache::LRU.new(size => 200);
# request args
has $.per_page;
has $.jsonp_callback;
has $.time-zone;
has $.media-type is rw;
# response args
has $.auto_pagination = 0;
has @.with = ();
has %.role_data;
submethod BUILD(*%args) {
if %args<with>:exists {
for %args<with> -> $n {
my $class = "WebService::GitHub::Role::$n";
require ::($class);
self does ::($class);
}
}
# does not work
# for %args.kv -> $k, $value {
# self."$k"( $value );
# }
# backwards
$!access-token = %args<access-token> if %args<access-token>:exists;
$!auth_login = %args<auth_login> if %args<auth_login>:exists;
$!auth_password = %args<auth_password> if %args<auth_password>:exists;
$!endpoint = %args<endpoint> if %args<endpoint>:exists;
}
method request(Str $path, $method='GET', :%data is copy) {
my $url = $.endpoint ~ $path;
if ($method eq 'GET') {
%data<per_page> = $.per_page if $.per_page.defined;
%data<callback> = $.jsonp_callback if $.jsonp_callback.defined;
# dummy, not supported
# $uri.query_form(|%data);
$url ~= '?' ~ (for %data.kv -> $k, $v {
$k ~ '=' ~ uri-escape($v)
}).join('&') if %data.elems;
}
my $uri = URI.new($url);
my $request = HTTP::Request.new(|($method => $uri));
$request.header.field(User-Agent => $.useragent);
if $.media-type.defined {
$request.header.field(Accept => $.media-type);
} else {
$request.header.field(Accept => 'application/vnd.github.v3+json');
}
if $.time-zone.defined {
$request.header.field(
Time-Zone => $.time-zone
);
}
if $.auth_login.defined && $.auth_password.defined {
$request.header.field(
Authorization => "Basic " ~ MIME::Base64.encode-str("{$.auth_login}:{$.auth_password}")
);
} elsif ($.access-token) {
$request.header.field(
Authorization => "token " ~ $.access-token
);
}
if ($method ne 'GET' and %data) {
$request.content = to-json(%data).encode;
$request.header.field(Content-Length => $request.content.bytes.Str);
}
$request = $.prepare_request($request);
my $res = self._make_request($request);
$res = $.handle_response($res);
my $ghres = WebService::GitHub::Response.new(
raw => $res,
auto_pagination => $.auto_pagination,
);
if (!$ghres.is-success && $ghres.data<message>) {
my $message = $ghres.data<message>;
my $errors = $ghres.data<errors>;
if ($errors[0]{"message"}) {
$message = $message ~ ' - ' ~ $errors[0]{"message"};
}
X::WebService::GitHub.new(reason => $message).throw;
}
return $ghres;
}
method _make_request($request) {
## only support GET
if $request.method ne 'GET' {
return $.ua.request($request);
}
my $cached_res = $.cache.get($request.file);
if $cached_res {
# $request.header.field(
# If-None-Match => $cached_res.field('ETag').Str
# );
$request.header.field(
If-Modified-Since => $cached_res.field('Last-Modified').Str
);
my $res = $.ua.request($request);
if $res.code == 304 {
return $cached_res;
}
$.cache.set($request.file, $res);
return $res;
} else {
my $res = $.ua.request($request);
$.cache.set($request.file, $res);
return $res;
}
}
# for role override
method prepare_request($request) { return $request }
method handle_response($response) { return $response }
}