Jaspersoft：如何使用代理服务器（内部到外部）调用可视化js

Md. Alim Ul Karim 发表于 Dev

博士阿林·乌尔·卡里姆（Alim Ul Karim）

我们正在使用Jaspersoft生成和检索报告。该服务器在内部网络（专用IP地址）中运行。Web Api中有一个代理服务器（外部服务器），用于接收可视化js和所有其他请求。然后，我们将此请求转发到Jaspersoft服务器。我们的方法如下：

protected override async Task<HttpResponseMessage> SendAsync(
            HttpRequestMessage request, CancellationToken cancellationToken) {
    var uriBuilder = new UriBuilder(request.RequestUri);
    uriBuilder.Host = "internal address";

    request.RequestUri = uriBuilder.Uri;
    if (request.Method == HttpMethod.Get) {
        request.Content = null;
    }

    var response = await new HttpClient().SendAsync(request,
            HttpCompletionOption.ResponseHeadersRead, cancellationToken);
    return response;
}

该方法可以成功下载visualize.js，但是当我们visualize()从visualize.js调用method时，对于jaspersoft服务器返回的某些请求404-Not Found。

Emdadul Sawon

我不确定为什么会发生错误。但是我希望问题是您正在HttpClient为每个请求创建对象。您应该创建一次该对象并使用该对象。试试这个

//Initiate HttpClient object here
private HttpClient _client = new HttpClient();

protected override async Task<HttpResponseMessage> SendAsync(
            HttpRequestMessage request, CancellationToken cancellationToken) {
    var uriBuilder = new UriBuilder(request.RequestUri);
    uriBuilder.Host = "internal address";

    request.RequestUri = uriBuilder.Uri;
    if (request.Method == HttpMethod.Get) {
        request.Content = null;
    }

    var response = await _client.SendAsync(request,
            HttpCompletionOption.ResponseHeadersRead, cancellationToken);
    return response;
}