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Initial rewrite of REST class; needs more testing, but should be functional

Browse source 
- improves #53
- improves #66
This commit is contained in:
J. King 2018-01-06 12:02:45 -05:00
parent 890f9b07d4
commit 3fa2d38f31
14 changed files with 171 additions and 89 deletions
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5
CHANGELOG
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@ -1,6 +1,11 @@
Version 0.3.0 (2018-??-??)
==========================
Bug fixes:
- Correctly handle %-encoded request URLs
- Overhaul protocol detection to fix various subtle bugs
- Overhaul HTTP response handling for more consistent results
Changes:
- Make date strings in TTRSS explicitly UTC

8
UPGRADING
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@ -9,6 +9,14 @@ When upgrading between any two versions of The Arsse, the following are usually
- If installing from source, update dependencies with `composer install -o --no-dev`
Upgrading from 0.2.1 to 0.3.0
=============================
- The following Composer dependencies have been added:
- zendframework/zend-diactoros
- psr/http-message
Upgrading from 0.2.0 to 0.2.1
=============================

4
arsse.php
View file

@ -24,5 +24,7 @@ if (\PHP_SAPI=="cli") {
Arsse::$conf->importFile(BASE."config.php");
}
// handle Web requests
(new REST)->dispatch()->output();
$emitter = new \Zend\Diactoros\Response\SapiEmitter();
$response = (new REST)->dispatch();
$emitter->emit($response);
}

97
lib/REST.php
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@ -6,8 +6,14 @@
declare(strict_types=1);
namespace JKingWeb\Arsse;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Zend\Diactoros\ServerRequest;
use Zend\Diactoros\ServerRequestFactory;
use Zend\Diactoros\Response\EmptyResponse;
class REST {
protected $apis = [
const API_LIST = [
// NextCloud News version enumerator
'ncn' => [
'match' => '/index.php/apps/news/api',
@ -21,7 +27,7 @@ class REST {
'class' => REST\NextCloudNews\V1_2::class,
],
'ttrss_api' => [ // Tiny Tiny RSS https://git.tt-rss.org/git/tt-rss/wiki/ApiReference
'match' => '/tt-rss/api/',
'match' => '/tt-rss/api',
'strip' => '/tt-rss/api',
'class' => REST\TinyTinyRSS\API::class,
],
@ -44,40 +50,93 @@ class REST {
// NewsBlur http://www.newsblur.com/api
// Feedly https://developer.feedly.com/
];
protected $apis = [];
public function __construct() {
public function __construct(array $apis = null) {
$this->apis = $apis ?? self::API_LIST;
}
public function dispatch(REST\Request $req = null): \Psr\Http\Message\ResponseInterface {
if ($req===null) {
$req = new REST\Request();
}
$api = $this->apiMatch($req->url, $this->apis);
$req->url = substr($req->url, strlen($this->apis[$api]['strip']));
$req->refreshURL();
$class = $this->apis[$api]['class'];
$drv = new $class();
if ($req->head) {
$res = $drv->dispatch($req);
$res->head = true;
return $res;
public function dispatch(ServerRequestInterface $req = null): ResponseInterface {
// create a request object if not provided
$req = $req ?? ServerRequestFactory::fromGlobals();
// find the API to handle
list ($api, $target, $class) = $this->apiMatch($req->getRequestTarget(), $this->apis);
// modify the request to have a stripped target
$req = $req->withRequestTarget($target);
// generate a response
$res = $this->handOffRequest($class, $req);
// modify the response so that it has all the required metadata
$res = $this->normalizeResponse($res, $req);
}
protected function handOffRequest(string $className, ServerRequestInterface $req): ResponseInterface {
// instantiate the API handler
$drv = new $className();
// perform the request and return the response
if ($req->getMethod()=="HEAD") {
// if the request is a HEAD request, we act exactly as if it were a GET request, and simply remove the response body later
return $drv->dispatch($req->withMethod("GET"));
} else {
return $drv->dispatch($req);
}
}
public function apiMatch(string $url, array $map): string {
public function apiMatch(string $url): array {
$map = $this->apis;
// sort the API list so the longest URL prefixes come first
uasort($map, function ($a, $b) {
return (strlen($a['match']) <=> strlen($b['match'])) * -1;
});
// normalize the target URL
$url = REST\Target::normalize($url);
// find a match
foreach ($map as $id => $api) {
// first try a simple substring match
if (strpos($url, $api['match'])===0) {
return $id;
// if it matches, perform a more rigorous match and then strip off any defined prefix
$pattern = "<^".preg_quote($api['match'])."([/\?#]|$)>";
if ($url==$api['match'] || in_array(substr($api['match'], -1, 1), ["/", "?", "#"]) || preg_match($pattern, $url)) {
$target = substr($url, strlen($api['strip']));
} else {
// if the match fails we are not able to handle the request
throw new REST\Exception501();
}
// return the API name, stripped URL, and API class name
return [$id, $target, $api['class']];
}
}
// or throw an exception otherwise
// or throw an exception otherwise
throw new REST\Exception501();
}
public function normalizeResponse(ResponseInterface $res, RequestInterface $req = null): ResponseInterface {
// set or clear the Content-Length header field
$body = $res->getBody();
$bodySize = $body->getSize();
if ($bodySize || $res->getStatusCode()==200) {
// if there is a message body or the response is 200, make sure Content-Length is included
$res = $res->withHeader("Content-Length", (string) $bodySize);
} else {
// for empty responses of other statuses, omit it
$res = $res->withoutHeader("Content-Length");
}
// if the response is to a HEAD request, the body should be omitted
if ($req->getMethod()=="HEAD") {
$res = new EmptyResponse($res->getStatusCode(), $res->getHeaders());
}
// if an Allow header field is present, normalize it
if ($res->hasHeader("Allow")) {
$methods = preg_split("<\s+,\s+>", strtoupper($res->getHeaderLine()));
// if GET is allowed, HEAD should be allowed as well
if (in_array("GET", $methods) && !in_array("HEAD", $methods)) {
$methods[] = "HEAD";
}
// OPTIONS requests are always allowed by our handlers
if (!in_array("OPTIONS", $methods)) {
$methods[] = "OPTIONS";
}
$res = $res->withHeader("Allow", implode(", ", $methods));
}
return $res;
}
}

2
lib/REST/NextCloudNews/Exception404.php → lib/REST/Exception404.php
View file

@ -4,7 +4,7 @@
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\Arsse\REST\NextCloudNews;
namespace JKingWeb\Arsse\REST;
class Exception404 extends \Exception {
}

2
lib/REST/NextCloudNews/Exception405.php → lib/REST/Exception405.php
View file

@ -4,7 +4,7 @@
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\Arsse\REST\NextCloudNews;
namespace JKingWeb\Arsse\REST;
class Exception405 extends \Exception {
}

10
lib/REST/Exception501.php Normal file
View file

@ -0,0 +1,10 @@
<?php
/** @license MIT
* Copyright 2017 J. King, Dustin Wilson et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\Arsse\REST;
class Exception501 extends \Exception {
}

2
lib/REST/NextCloudNews/V1_2.php
View file

@ -16,6 +16,8 @@ use JKingWeb\Arsse\AbstractException;
use JKingWeb\Arsse\Db\ExceptionInput;
use JKingWeb\Arsse\Feed\Exception as FeedException;
use JKingWeb\Arsse\REST\Target;
use JKingWeb\Arsse\REST\Exception404;
use JKingWeb\Arsse\REST\Exception405;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;
use Zend\Diactoros\Response\JsonResponse as Response;

65
lib/REST/Response.php
View file

@ -1,65 +0,0 @@
<?php
/** @license MIT
* Copyright 2017 J. King, Dustin Wilson et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\Arsse\REST;
use JKingWeb\Arsse\Arsse;
class Response {
const T_JSON = "application/json";
const T_XML = "application/xml";
const T_TEXT = "text/plain";
public $head = false;
public $code;
public $payload;
public $type;
public $fields;
public function __construct(int $code, $payload = null, string $type = self::T_JSON, array $extraFields = []) {
$this->code = $code;
$this->payload = $payload;
$this->type = $type;
$this->fields = $extraFields;
}
public function output() {
if (!headers_sent()) {
foreach ($this->fields as $field) {
header($field);
}
$body = "";
if (!is_null($this->payload)) {
switch ($this->type) {
case self::T_JSON:
$body = (string) json_encode($this->payload, \JSON_PRETTY_PRINT);
break;
default:
$body = (string) $this->payload;
break;
}
}
if (strlen($body)) {
header("Content-Type: ".$this->type);
header("Content-Length: ".strlen($body));
} elseif ($this->code==200) {
$this->code = 204;
}
try {
$statusText = Arsse::$lang->msg("HTTP.Status.".$this->code);
} catch (\JKingWeb\Arsse\Lang\Exception $e) {
$statusText = "";
}
header("Status: ".$this->code." ".$statusText);
if (!$this->head) {
echo $body;
}
} else {
throw new REST\Exception("headersSent");
}
}
}

1
tests/bootstrap.php
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@ -9,4 +9,5 @@ namespace JKingWeb\Arsse;
const NS_BASE = __NAMESPACE__."\\";
define(NS_BASE."BASE", dirname(__DIR__).DIRECTORY_SEPARATOR);
ini_set("memory_limit", "-1");
error_reporting(\E_ALL);
require_once BASE."vendor".DIRECTORY_SEPARATOR."autoload.php";

50
tests/cases/REST/TestREST.php Normal file
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@ -0,0 +1,50 @@
<?php
/** @license MIT
* Copyright 2017 J. King, Dustin Wilson et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\Arsse\TestCase\REST;
use JKingWeb\Arsse\REST;
use JKingWeb\Arsse\REST\Exception501;
/** @covers \JKingWeb\Arsse\REST */
class TestREST extends \JKingWeb\Arsse\Test\AbstractTest {
/** @dataProvider provideApiMatchData */
public function testMatchAUrlToAnApi($apiList, string $input, array $exp) {
$r = new REST($apiList);
try {
$out = $r->apiMatch($input);
} catch (Exception501 $e) {
$out = [];
}
$this->assertEquals($exp, $out);
}
public function provideApiMatchData() {
$real = null;
$fake = [
'unstripped' => ['match' => "/full/url", 'strip' => "", 'class' => "UnstrippedProtocol"],
];
return [
[$real, "/index.php/apps/news/api/v1-2/feeds", ["ncn_v1-2", "/feeds", \JKingWeb\Arsse\REST\NextCloudNews\V1_2::class]],
[$real, "/index.php/apps/news/api/v1-2", ["ncn", "/v1-2", \JKingWeb\Arsse\REST\NextCloudNews\Versions::class]],
[$real, "/index.php/apps/news/api/", ["ncn", "/", \JKingWeb\Arsse\REST\NextCloudNews\Versions::class]],
[$real, "/index%2Ephp/apps/news/api/", ["ncn", "/", \JKingWeb\Arsse\REST\NextCloudNews\Versions::class]],
[$real, "/index.php/apps/news/", []],
[$real, "/index!php/apps/news/api/", []],
[$real, "/tt-rss/api/index.php", ["ttrss_api", "/index.php", \JKingWeb\Arsse\REST\TinyTinyRSS\API::class]],
[$real, "/tt-rss/api", ["ttrss_api", "", \JKingWeb\Arsse\REST\TinyTinyRSS\API::class]],
[$real, "/tt-rss/API", []],
[$real, "/tt-rss/api-bogus", []],
[$real, "/tt-rss/api bogus", []],
[$real, "/tt-rss/feed-icons/", ["ttrss_icon", "", \JKingWeb\Arsse\REST\TinyTinyRSS\Icon::class]],
[$real, "/tt-rss/feed-icons/", ["ttrss_icon", "", \JKingWeb\Arsse\REST\TinyTinyRSS\Icon::class]],
[$real, "/tt-rss/feed-icons", []],
[$fake, "/full/url/", ["unstripped", "/full/url/", "UnstrippedProtocol"]],
[$fake, "/full/url-not", []],
];
}
}

2
tests/cases/REST/TestTarget.php
View file

@ -8,7 +8,7 @@ namespace JKingWeb\Arsse\TestCase\REST;
use JKingWeb\Arsse\REST\Target;
/** @covers \JKingWeb\Arsse\REST\Target<extended> */
/** @covers \JKingWeb\Arsse\REST\Target */
class TestTarget extends \JKingWeb\Arsse\Test\AbstractTest {
/** @dataProvider provideTargetUrls */

11
tests/lib/AbstractTest.php
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@ -15,6 +15,14 @@ use Zend\Diactoros\Response\EmptyResponse;
/** @coversNothing */
abstract class AbstractTest extends \PHPUnit\Framework\TestCase {
public function setUp() {
$this->clearData();
}
public function tearDown() {
$this->clearData();
}
public function assertException(string $msg = "", string $prefix = "", string $type = "Exception") {
if (func_num_args()) {
$class = \JKingWeb\Arsse\NS_BASE . ($prefix !== "" ? str_replace("/", "\\", $prefix) . "\\" : "") . $type;
@ -34,10 +42,11 @@ abstract class AbstractTest extends \PHPUnit\Framework\TestCase {
protected function assertResponse(ResponseInterface $exp, ResponseInterface $act, string $text = null) {
$this->assertEquals($exp->getStatusCode(), $act->getStatusCode(), $text);
$this->assertInstanceOf(get_class($exp), $act);
if ($exp instanceof JsonResponse) {
$this->assertEquals($exp->getPayload(), $act->getPayload(), $text);
$this->assertSame($exp->getPayload(), $act->getPayload(), $text);
} else {
$this->assertEquals((string) $exp->getBody(), (string) $act->getBody(), $text);
}
$this->assertEquals($exp->getHeaders(), $act->getHeaders(), $text);
}

1
tests/phpunit.xml
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@ -67,6 +67,7 @@
</testsuite>
<testsuite name="REST">
<file>cases/REST/TestTarget.php</file>
<file>cases/REST/TestREST.php</file>
</testsuite>
<testsuite name="NCNv1">
<file>cases/REST/NextCloudNews/TestVersions.php</file>