PHP 与 neo4j 的连接 "cURL error 7"

Question

我遵循了这个 related question 中的步骤但是这个错误出现在我身上，你能帮忙吗？

HttpException in HttpRequestEventSubscriber.php line 74: Error on Connection "default" with message "cURL error 7: Failed to connect to localhost port 7474: Connection refused (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)"

这是我的.env 代码

`APP_ENV=local
APP_DEBUG=true
APP_KEY=ChTIcRHTSR35M6rP0jwmOmhMNLuFpMVe

NEO4J_HOST=localhost
NEO4J_PORT=7474
NEO4J_USER=neo4j
NEO4J_PASSWORD=admin
NEO4J_TIMEOUT=300

CACHE_DRIVER=file
SESSION_DRIVER=file
QUEUE_DRIVER=sync

MAIL_DRIVER=smtp
MAIL_HOST=mailtrap.io
MAIL_PORT=2525
MAIL_USERNAME=null
MAIL_PASSWORD=null
MAIL_ENCRYPTION=null
`

这是 NeoClientServiceProvider 的代码

    <?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Neoxygen\NeoClient\ClientBuilder;

class NeoClientServiceProvider extends ServiceProvider
{
    /**
     * Register the application services.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton('neoclient', function ($app) {
            return ClientBuilder::create()
                ->addConnection('default', 'http', env('NEO4J_HOST'), intval(env('NEO4J_PORT')), true, env('NEO4J_USER'), env('NEO4J_PASSWORD'))
                ->setDefaultTimeout( intval(env('NEO4J_TIMEOUT')) )
                ->setAutoFormatResponse(true)
                ->build();
        });
    }
}

这是供应商<​​/p>

 App\Providers\NeoClientServiceProvider::class,

别名

'NeoClient' => App\NeoClient::class

这是 NeoClient 类代码

 <?php namespace App;

use Illuminate\Support\Facades\Facade;

class NeoClient extends Facade
{

    protected static function getFacadeAccessor() { return 'neoclient'; }
}

我的测试 Controller

  <?php

namespace App\Http\Controllers;

use App\NeoClient;
use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;

class test extends Controller
{

    public function index()
    {

        $data = NeoClient::sendCypherQuery('CREATE (user:User {name:"Kenneth"}) RETURN user');

    }

}

当我在 ClientBuilder 类中的函数 addConnection 中为此进行转储时

 public function addConnection($alias, $scheme, $host, $port, $authMode = false, $authUser = null, $authPassword = null)
    {
        $this->configuration['connections'][$alias] = array(
            'scheme' => $scheme,
            'host' => $host,
            'port' => $port,
            'auth' => $authMode,
            'user' => $authUser,
            'password' => $authPassword,
        );
  dd($this);
        return $this;
    }

Answer 1

好的。我安装了 Homestead 来重现您的环境。正如评论中所说，这应该是一个主机问题。我设法使您与 neo4j 的连接正常工作:

1. ssh 到宅基地:


ssh 流浪者@127.0.0.1 -p 2222


1. 显示 vagrant box 的网关 ip :


vagrant@homestead:~$ ip 路由显示
默认通过 10.0.2.2 dev eth0
10.0.2.0/24 dev eth0 proto 内核范围链接 src 10.0.2.15
192.168.10.0/24 dev eth1 proto kernel scope link src 192.168.10.10


这里主机网关是10.0.2.2

1. 将网关用作 neo4j 主机:


$ curl --user neo4j:admin "http://10.0.2.2:7474/db/data/"
“扩展”:{}，
“节点”:“http://10.0.2.2:7474/db/data/node”，
“节点索引”:“http://10.0.2.2:7474/db/data/index/node”，
“relationship_index”:“http://10.0.2.2:7474/db/data/index/relationship”，
“extensions_info”:“http://10.0.2.2:7474/db/data/ext”，
“relationship_types”:“http://10.0.2.2:7474/db/data/relationship/types”，
“批处理”:“http://10.0.2.2:7474/db/data/batch”，
“密码”:“http://10.0.2.2:7474/db/data/cypher”，
“索引”:“http://10.0.2.2:7474/db/data/schema/index”，
“约束”:“http://10.0.2.2:7474/db/data/schema/constraint”，
“交易”:“http://10.0.2.2:7474/db/data/transaction”，
“节点标签”:“http://10.0.2.2:7474/db/data/labels”，
“neo4j_version”:“3.0.0-alpha.163”