0

我正在尝试制作一个 Jasper 客户端，其流程如下：它们是两个应用程序。一个调用另一个并由 iframe 显示。

  1. 主应用程序将凭据发送到 iframe 应用程序以获取会话并执行报告执行。

  2. iframe 应用程序进行 REST 调用以获取会话，然后调用另一个以请求运行报告。结果是一个重定向到加载屏幕的链接。

资源

/**
 * Request Execution "Servlet"
 * 
 * @param request
 * @param response
 * @return
 * @throws IOException
 * @throws ServletException 
 */
@Override
@POST
@Path("/execution")
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
@Produces(MediaType.TEXT_HTML)
public String requestExection(@FormParam("username") String username,
        @FormParam("pass") String pass,
        @FormParam("type") String fileType,
        @FormParam("fileUri") String reportUnit,
        @FormParam("params") String params,
        @Context HttpServletResponse response) throws IOException, ServletException {

    JasperAuthentication session = new JasperAuthentication();
    CookieStore cookieStore = new BasicCookieStore();
    HttpContext httpContext = new BasicHttpContext();
    httpContext.setAttribute(HttpClientContext.COOKIE_STORE, cookieStore);
    
    List<NameValuePair> urlParameters = new ArrayList<>();
    urlParameters.add(new BasicNameValuePair("j_username",username));
    urlParameters.add(new BasicNameValuePair("j_password",pass));   
    
    String url = "";
    
    try {           
        boolean valid = session.openSession(urlParameters,response,httpContext);
        
        if (valid) {
            ReportObject repObj;
            Configuration config = PropertiesUtil.getProperties();
            repObj = requestJasperReport(params, fileType, reportUnit, response, httpContext);

            if (repObj != null) {
                String strcookie = ServletUtils.getAllCookies(httpContext, ";");
                System.out.println("Cookie String: " + strcookie);
                Cookie cookie = new Cookie("context",
                        URLEncoder.encode(strcookie, StandardCharsets.UTF_8.toString()));
                cookie.setPath("/");
                cookie.setHttpOnly(true);
                response.addCookie(cookie);
                url = config.getString("client.host.url") + "/report-viewer/visualizer/processing?type=" + fileType
                        + "&ticket=" + repObj.requestId + "&resource=" + repObj.exports.get(0).id + "&date="+getExpiryPropFromJasper(strcookie);
            }
        }
    } catch (ConfigurationException e) {
        e.printStackTrace();
    }
    
    return "{\"report_url\":\""+url+"\"}";
}

/**
 * Method for Request a Jasper Report to Server
 * 
 * @param strParams
 * @param fileType
 * @param response
 * @param client
 * @param httpContext
 * @return
 * @throws ClientProtocolException
 * @throws IOException
 * @throws ConfigurationException 
 */
private ReportObject requestJasperReport(String strParams,
        String fileType,
        String reportUnit,
        HttpServletResponse response,
        HttpContext httpContext) throws IOException, ConfigurationException {
    Configuration config = PropertiesUtil.getProperties();
    StringBuilder sb = new StringBuilder();
    sb.append(config.getString("server.host.url"))
        .append(config.getString("services.report.execution"));
    HttpPost post = new HttpPost(sb.toString());
    Gson mGson = new Gson();

    Map<String, String> params = new HashMap<>();
    
    if (strParams != null) {
        String[] parameters = strParams.split(",");

        for (int i = 0; i < parameters.length; i++) {
            String[] aux = parameters[i].split(":");
            params.put(aux[0], aux[1]);
        }
    }
    
    post.setHeader("Content-Type", "application/xml;");

    post.setEntity(new StringEntity(ServletUtils.makeXMLRequest(reportUnit, params, fileType)));

    int coderes;

    Header[] headers = null;
    
    String content = "";
    
    ReportObject repRes = null;

    try (CloseableHttpClient client = HttpClients.createDefault();
            CloseableHttpResponse chres = client.execute(post,httpContext)) {
        StatusLine status = chres.getStatusLine();
        coderes = status.getStatusCode();
        headers = chres.getAllHeaders();
        content = EntityUtils.toString(chres.getEntity());
    }

    if (coderes == 200 && content != null && content.length() > 1) {

        repRes = mGson.fromJson(content, ReportObject.class);
        
        for (int i = 0; i < headers.length; i++) {
            System.out.println(headers[i].getName() + "=" + headers[i].getValue());
            response.addHeader(headers[i].getName(), headers[i].getValue());
        }
        
    }
    return repRes;
}

/**
 * To get Expiration Date of a Cookie from Jasper Server
 * 
 * @param jaspercookie
 * @return
 */
private String getExpiryPropFromJasper(String jaspercookie) {
    String[] expirity = jaspercookie.split("expiry=");
    return expirity[1].substring(0,expirity[1].length() - 2);
}

  1. 当主应用程序收到 URL 时，他会显示加载页面。加载屏幕的工作方式如下……等待 10 秒，然后重定向到另一个 servlet，它在该处请求报告的执行状态。如果报告准备好了，它会重定向到下载它的屏幕，如果它还没有准备好，那么它会重定向到加载屏幕。（我给你看这个是因为我怀疑这个）

     var cont = 10;

 var intervalId = setInterval(countdown,1000);

 function countdown() {
 var ticket = $('#ticket').val();
 var type = $('#type').val();
 var resource = $('#resource').val();
 var tries = $('#tries').val();
 tries++;
 var url = window.location.protocol + "//" + window.location.host + "/report- 
 viewer/visualizer/waitingroom? 
 type="+type+"&ticket="+ticket+"&resource="+resource+"&tries="+tries;

 if (cont<=0) {
     clearInterval(intervalId);
     location.href = url;
 }
 cont--;
 }

问题从这里开始。当我尝试请求上一步时，我在控制台中收到此错误消息：

org.apache.http.MalformedChunkCodingException: Bad Chunk Header: {"url":"http://localhost:8080/report-viewer/visualizer/processing? . . ."} at org.apache.http.impl.io.ChunckedInputStream..getChunkSize...

但在我得到这个之前，我注意到我使用 javascript 进入了这一部分。（顺便说一句，接收到 401，这意味着我的会话似乎无效，即使我保存在 cookie 中的信息与登录 web 服务抛出的会话 cookie 完全相同。也许我错过了一些东西来保持这种视觉活跃) 然后如果我尝试再次执行调用序列，则会收到错误消息。

我可以读到默认情况下，apache 具有 maxKeepAliveRequests = 100 的属性。我怀疑我的 javascript 可能会触发这个，因为可能在循环内部（在 javascript - JSP 之间）它正在打开连接（这只是怀疑）。

我在没有连接两个应用程序的情况下拨打了所有电话，它们运行良好，我能够下载报告。当我尝试连接两个应用程序时会出现此问题...

我可以在这里做什么？

4

0 回答 0