Neo4j PHP Graphaware '400 Bad Content-Type header' error

Question

The following test case (assuming correct password)

<?php
    require_once "vendor/autoload.php";
    use GraphAware\Neo4j\Client\ClientBuilder;
    $client = ClientBuilder :: create() -> addConnection("default", "http://neo4j:Password@localhost:7474") -> build();
    $query  = "MATCH (u:User)
               RETURN u";
    $result = $client -> run($query);
    $user = $result -> firstRecord() -> values()[0];
?>

gives me the following error:

PHP Fatal error:  Uncaught GuzzleHttp\\Exception\\ClientException: Client error: `POST http://neo4j:***@localhost:7474/db/data/transaction/commit` resulted in a `400 Bad Content-Type header value: ''` response in /var/www/html/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php:113
Stack trace:
#0 /var/www/html/vendor/guzzlehttp/guzzle/src/Middleware.php(66): GuzzleHttp\\Exception\\RequestException::create(Object(GuzzleHttp\\Psr7\\Request), Object(GuzzleHttp\\Psr7\\Response))
#1 /var/www/html/vendor/guzzlehttp/promises/src/Promise.php(203): GuzzleHttp\\Middleware::GuzzleHttp\\{closure}(Object(GuzzleHttp\\Psr7\\Response))
#2 /var/www/html/vendor/guzzlehttp/promises/src/Promise.php(156): GuzzleHttp\\Promise\\Promise::callHandler(1, Object(GuzzleHttp\\Psr7\\Response), Array)
#3 /var/www/html/vendor/guzzlehttp/promises/src/TaskQueue.php(47): GuzzleHttp\\Promise\\Promise::GuzzleHttp\\Promise\\{closure}()
#4 /var/www/html/vendor/guzzlehttp/promises/src/Promise.php(246): GuzzleHttp\\Promise\\TaskQueue->run(true)
#5 /var/www/html/vendor/guzzlehttp/ in /var/www/html/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php on line 113, referer: http://localhost/

This is the $client when I var_dump it:

object(GraphAware\Neo4j\Client\Client)#7 (2) {
  ["connectionManager":protected]=>
  object(GraphAware\Neo4j\Client\Connection\ConnectionManager)#2 (2) {
    ["connections":"GraphAware\Neo4j\Client\Connection\ConnectionManager":private]=>
    array(1) {
      ["default"]=>
      object(GraphAware\Neo4j\Client\Connection\Connection)#4 (5) {
        ["alias":"GraphAware\Neo4j\Client\Connection\Connection":private]=>
        string(7) "default"
        ["uri":"GraphAware\Neo4j\Client\Connection\Connection":private]=>
        string(38) "http://neo4j:Password@localhost:7474"
        ["driver":"GraphAware\Neo4j\Client\Connection\Connection":private]=>
        object(GraphAware\Neo4j\Client\HttpDriver\Driver)#6 (2) {
          ["uri":protected]=>
          string(38) "http://neo4j:Password@localhost:7474"
          ["config":protected]=>
          object(GraphAware\Neo4j\Client\HttpDriver\Configuration)#5 (1) {
            ["timeout":protected]=>
            int(5)
          }
        }
        ["session":"GraphAware\Neo4j\Client\Connection\Connection":private]=>
        NULL
        ["timeout":"GraphAware\Neo4j\Client\Connection\Connection":private]=>
        int(5)
      }
    }
    ["master":"GraphAware\Neo4j\Client\Connection\ConnectionManager":private]=>
    NULL
  }
  ["eventDispatcher":protected]=>
  object(Symfony\Component\EventDispatcher\EventDispatcher)#8 (2) {
    ["listeners":"Symfony\Component\EventDispatcher\EventDispatcher":private]=>
    array(0) {
    }
    ["sorted":"Symfony\Component\EventDispatcher\EventDispatcher":private]=>
    array(0) {
    }
  }
}

I don't know how to interpret this or what is wrong.

My database is running properly in the neo4j browser client.
As far as I know graphaware is installed appropriately, as per the instructions on the website.
I have tested and the error occurs at the point of running the query, not at the point of creating the client (even though this is not indicated clearly by the error).
If I copy / paste the query directly into the neo4j browser client then it works as expected.

Any idea why I am getting this error?

Can you var_dump $client? Also have you tried to update or rollback your guzzle version? — thecoolestguyever123, Sep 04 '18 at 15:33
@StephanosPapastylianou Is the actual url you're trying to hit localhost? If so have you tried replacing localhost with 127.0.0.1 ? — thecoolestguyever123, Sep 05 '18 at 23:55
@luminoslty Yes the actual url is localhost and unfortunately 127.0.0.1 doesn't work either... — Stephanos Papastylianou, Sep 06 '18 at 11:50
does your password contains some special characters (like @, /, :, ..) ? — logisima, Sep 07 '18 at 10:46

score 3 · Accepted Answer · answered Sep 09 '18 at 12:59

According to GraphAware PHP Client you don't seem to use the latest version, so you need to update, OR you hit the empty array bug (e.g. Your problem is that you don't send Content-Type:application/json, that seems to only be set using function prepareRequest in GraphAware\Neo4j\Client\HttpDriver\Session). Also look at your query syntax since it seems to be deprecated in Install instructions and in the developer documentation for Neo4j.

score 0 · Answer 2 · answered Oct 30 '18 at 16:13

0

I was facing the same issue, in my case, the solution was to downgrade PHP from 7.1 to 7.0. This supposes to help You either.

answered Oct 30 '18 at 16:13

bdlk

9
3

score 0 · Answer 3 · answered Dec 05 '19 at 17:23

0

Do install php-curl module and try, it should work.

Discussed here: https://github.com/graphaware/neo4j-php-client/issues/142#issuecomment-558857861

answered Dec 05 '19 at 17:23

Kutum

1

A link to a solution is welcome, but please ensure your answer is useful without it: [add context around the link](//meta.stackexchange.com/a/8259) so your fellow users will have some idea what it is and why it’s there, then quote the most relevant part of the page you're linking to in case the target page is unavailable. [Answers that are little more than a link may be deleted.](//stackoverflow.com/help/deleted-answers) – Das_Geek Dec 05 '19 at 18:49

Neo4j PHP Graphaware '400 Bad Content-Type header' error

3 Answers3