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[LDAP] fix pagination for PHP 7.4 & 8.0 #38875

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Nek-
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@Nek- Nek- commented Oct 28, 2020

Q A
Branch? 4.4
Bug fix? yes
New feature? no
Deprecations? no
Tickets #38874
License MIT
Doc PR N/A

After PR #38392 there is a little issue in the Symfony code base that
occurs only for PHP 7.4 and PHP 8.0.

This is related to issue #38874

@Nek- Nek- force-pushed the fix/ldap-issue-on-php-74-80 branch from ec99d01 to 2e8f4ff Compare October 29, 2020 00:15
@Nek- Nek- changed the base branch from 5.x to 4.4 October 29, 2020 00:23
@Nek- Nek- force-pushed the fix/ldap-issue-on-php-74-80 branch from 2e8f4ff to 02f4ffd Compare October 29, 2020 08:48
@nicolas-grekas nicolas-grekas changed the title [LDAP] issue #38874 : pagination for PHP 7.4 & 8.0 [LDAP] fix pagination for PHP 7.4 & 8.0 Oct 29, 2020
@nicolas-grekas nicolas-grekas added this to the 4.4 milestone Oct 29, 2020
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can't this be tested?

*/
private function controlPagedResultResponse($con, $result, string $cookie = ''): string
{
$this->serverctrls = [];

if (\PHP_VERSION_ID < 70300) {
ldap_control_paged_result_response($con, $result, $cookie);
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What's the point of calling this function when $result === null? Is that legal for its API?

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Hum. Not sure. It will probably return an empty string. I have to admit that I never paginated LDAP result so IDK. At least I should send 0 to keep compatibility.

@@ -174,8 +174,7 @@ public function getResources(): array
private function resetPagination()
{
$con = $this->connection->getResource();
$this->controlPagedResultResponse($con, 0, '');
$this->serverctrls = [];
$this->controlPagedResultResponse($con, null, '');
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shouldn't we skip calling this method instead here (and keep $this->serverctrls = [];?)
see my other comment

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@Nek- Nek- Oct 29, 2020

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I think so. I just wanted to not break anything since I can't test it. It was actually used here in the same context before the refactoring of #38392

See: https://github.com/symfony/symfony/pull/38392/files#diff-24b79f3ac1a99938f5acb158a450e38d30c1984a5d333b5b20f2c38a73d10e31L183

After PR symfony#38392 there is a little issue in the Symfony code base that
occurs only for PHP 7.4 and PHP 8.0.

This is related to issue symfony#38874
@Nek- Nek- force-pushed the fix/ldap-issue-on-php-74-80 branch from 02f4ffd to 65c1166 Compare October 29, 2020 17:19
if (\PHP_VERSION_ID < 70300) {
ldap_control_paged_result_response($con, $result, $cookie);

return $cookie;
}

if (0 === $result) {
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to really be compatible and seamless, this should be an elseif - otherwise, we're affecting the behavior on php <=7.3.

a test case would really help if you can have a look

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There's a return in the previous if content, how can this impact the previous statements? 🤔

I was not able to run the test entire test suite on my computer :( . I'll give another try, but if you have any insights about running slapd that'd be great ^^' .

@@ -175,7 +175,6 @@ private function resetPagination()
{
$con = $this->connection->getResource();
$this->controlPagedResultResponse($con, 0, '');
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@jderusse jderusse Oct 30, 2020

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Looking at the original PR : https://github.com/symfony/symfony/pull/38392/files#diff-24b79f3ac1a99938f5acb158a450e38d30c1984a5d333b5b20f2c38a73d10e31L183-R177

I think the fix, should be to change this line to:

Suggested change
$this->controlPagedResultResponse($con, 0, '');
$this->controlPagedResult($con, 0, '');

and keep the rest of the code.

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/cc @lucasaba

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@lucasaba lucasaba Oct 30, 2020

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Not sure. The original error is on #38874 is Warning: ldap_parse_result() expects parameter 2 to be resource, int given.

The only place where ldap_parse_result receive an in is when it is called from
$this->controlPagedResultResponse($con, 0, '');

I think the correct solutions is to call it with $this->controlPagedResultResponse($con, null, '');

But your proposal should work as well... I need to test it. I'll check with a working LDAP env.

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@lucasaba I think error on #38874 is a result of mistake on #38392
Why ldap_control_paged_result was replaced by controlPagedResultResponse, not controlPagedResult?

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my point is, when. you replaced ldap_parse_result() by controlPagedResult in #38392, in that line you replaced it by controlPagedResultResponse.

This explain why the second argument is 0 and not a ressources.

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I've created a new repository with a test openldap server with the configuration needed by symony's tests.
You can find it here: https://github.com/lucasaba/symfony-ldap-test-server

Just docker-compose up it and launch test suite.

@jderusse suggestion fixes the problem. But I need some more time to make other checks. I'm unable to delete entries and I'm not sure if the problem is the LDAP server or the code.

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By the way: I had to modify AdapterTest and remove

const PAGINATION_REQUIRED_CONFIG = [
        'options' => [
            'protocol_version' => 3,
        ],
    ];

And I had to add, in LdapTestCase, after ldap_connect, the following:

ldap_set_option($h, LDAP_OPT_PROTOCOL_VERSION, 3);

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@jderusse You're completly right! Its all my bad.
@Nek- I could launch locally the tests and they all pass. I should've done it earlier. I'm not able to add the ldap server on github actions because I still don't have enough knowledge.

To launch the tests, just clone https://github.com/lucasaba/symfony-ldap-test-server, build it and launch it. Then you can run phpunit against the LDAP tests.

Just some more notes (since you're working on it):

  • remove definition of the PAGINATION_REQUIRED_CONFIG constant from src/Symfony/Component/Ldap/Tests/Adapter/ExtLdap.php and all its reference from the same file (it doesn't work)
  • add ldap_set_option($h, LDAP_OPT_PROTOCOL_VERSION, 3); on src/Symfony/Component/Ldap/Tests/LdapTestCase.php just after the connection
  • at row 85, in src/Symfony/Component/Ldap/Tests/Adapter/ExtLdap/LdapManagerTest.php, modify the test. The exception is a LdapException. AlreadyExistsException is used for an already existing connection.
  • after the testLdapAddDouble there is a new entry ('cn=Elsa Amrouche,dc=symfony,dc=com'). This will break all successive tests.... you should find a way to remove the entry just after the test....
  • at row 213, in src/Symfony/Component/Ldap/Tests/Adapter/ExtLdap/LdapManagerTest.php substitute the line with:
// $newEntry->getAttribute('cn') returns an array not a string
$this->assertContains($originalCN, $newEntry->getAttribute('cn'));
$this->assertContains('Kevin', $newEntry->getAttribute('cn'));

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@Nek- Nek- Nov 1, 2020

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Idk if it's related to be being under WSL ^^' but even with the docker it's not working (even with rebinding ports).

Since I can't run the whole test suite I think cleaning the test suite is not a super good idea since it's out of the scope of this PR.

@fabpot
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fabpot commented Nov 9, 2020

Closing in favor of #39031

@fabpot fabpot closed this Nov 9, 2020
fabpot added a commit that referenced this pull request Nov 9, 2020
This PR was merged into the 4.4 branch.

Discussion
----------

[Ldap] Fix pagination

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | #38874
| License       | MIT
| Doc PR        | N/A

This replaces #38875 to fix a bug introduced by #38392

Commits
-------

4fe0a6f Fix LDAP pagination
derrabus added a commit that referenced this pull request Nov 16, 2020
This PR was merged into the 4.4 branch.

Discussion
----------

[LDAP] Add ldap tests to github CI

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #39028
| License       | MIT
| Doc PR        |

Adds LDAP test on github actions pipeline and corrects sum bugs in the LDAP Component test

It also adds a bug resolution from @Nek- made in #38875

Commits
-------

ea78f72 Use GithubAction to run ldap tests
af9562b Adds LDAP Adapter test in integration group
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7 participants