Neo4jClient 交易 - 交易完成时出现身份验证错误

Question

我正在尝试使用 Neo4jClient 事务支持的最新预发布版本 (Neo4jClient 1.1.0-Tx00008)。我尝试了最简单的示例，但似乎总是在交易完成时收到身份验证错误（Neo4j Community 2.2.2 或 2.3）。以下代码：

        var graphClient = new GraphClient(new Uri("http://user:password@localhost:7474/db/data"));
        graphClient.Connect();

        using (var transaction = graphClient.BeginTransaction())
        {
            graphClient.Cypher.Create("(n:TestNode {Name:'TestNode2'})").ExecuteWithoutResults(); 
            graphClient.Cypher.Create("(n:TestNode {Name:'TestNode3'})").ExecuteWithoutResults(); 
            transaction.Commit();     
        }

调用事务提交时总是导致此错误，或者如果我排除 transaction.Commit() 并允许范围结束：

Received an unexpected HTTP status when executing the request.

The response status was: 401 Unauthorized

The response from Neo4j (which might include useful detail!) was: <html>
<head><title>401 Authorization Required</title></head>
<body bgcolor="white">
<center><h1>401 Authorization Required</h1></center>
<hr><center>nginx</center>
</body>
</html>

在不使用任何事务范围的情况下，可以很好地创建节点。我查看了源代码中的单元测试，但没有发现调用方式有任何区别。

Answer 1

恐怕您目前必须使用 AuthWrapper，它看起来像：

private class HttpClientAuthWrapper : IHttpClient
{
    private readonly AuthenticationHeaderValue _authenticationHeader;
    private readonly HttpClient _client;

    public HttpClientAuthWrapper(string username, string password)
    {
        _client = new HttpClient();
        if (string.IsNullOrWhiteSpace(username) || string.IsNullOrWhiteSpace(password))
            return;

        var encoded = Encoding.ASCII.GetBytes(string.Format("{0}:{1}", username, password));
        _authenticationHeader = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(encoded));
    }

    public Task<HttpResponseMessage> SendAsync(HttpRequestMessage request)
    {
        if(_authenticationHeader != null)
            request.Headers.Authorization = _authenticationHeader;
        return _client.SendAsync(request);
    }
}

然后像这样使用：

var client = new GraphClient(
    new Uri("http://localhost.:7474/db/data"), 
    new HttpClientAuthWrapper("user", "pass#")
    );
client.Connect();

这将使所有交易使用正确的身份验证 header。也感谢您在 Github 上提出问题 - 我们可以考虑妥善解决它！

（顺便一提-代码全部来自：http://geekswithblogs.net/cskardon/archive/2015/03/27/upgrading-your-neo4j-from-xxx-to-2.2.0ndashhaving-authorization-trouble.aspx）

Neo4jClient 交易 - 交易完成时出现身份验证错误

Neo4jClient Transactions - Auth Error on Transaction Completion

transactions

neo4jclient