Java 用于包装请求正文的吊索过滤器
用例： 我们正在开发一个AEM封闭用户组网站，用户需要提交触发工作流的表单。由于用户经过身份验证，部分工作流负载需要包括发起表单的用户 我正在考虑为此使用AEM表单，它保存到Java 用于包装请求正文的吊索过滤器,java,servlets,aem,sling,Java,Servlets,Aem,Sling,用例： 我们正在开发一个AEM封闭用户组网站，用户需要提交触发工作流的表单。由于用户经过身份验证，部分工作流负载需要包括发起表单的用户 我正在考虑为此使用AEM表单，它保存到/content/usergenerated/content/Forms/af/my site下的节点，但有效负载中没有提到用户（仅服务用户）。在这种情况下，有两个服务用户：运行工作流的工作流服务和处理表单处理和初始保存的fd服务。例如，从工作流步骤调用的以下代码报告“fd服务” workItem.getWorkflowDa
/content/usergenerated/content/Forms/af/my siteworkItem.getWorkflowData().getMetaDataMap().get("userId", String.class);
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.wrappers.SlingHttpServletRequestWrapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.ServletInputStream;
import java.io.*;
public class FormSubmitRequestWrapper extends SlingHttpServletRequestWrapper {
String requestPayload;
private static final Logger log = LoggerFactory.getLogger(FormSubmitRequestWrapper.class);
public FormSubmitRequestWrapper(SlingHttpServletRequest slingRequest) {
super(slingRequest);
// read the original payload into the requestPayload variable
StringBuilder stringBuilder = new StringBuilder();
BufferedReader bufferedReader = null;
try {
// read the payload into the StringBuilder
InputStream inputStream = slingRequest.getInputStream();
if (inputStream != null) {
bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
char[] charBuffer = new char[128];
int bytesRead = -1;
while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
stringBuilder.append(charBuffer, 0, bytesRead);
}
} else {
// make an empty string since there is no payload
stringBuilder.append("");
}
} catch (IOException ex) {
log.error("Error reading the request payload", ex);
} finally {
if (bufferedReader != null) {
try {
bufferedReader.close();
} catch (IOException iox) {
log.error("Error closing bufferedReader", iox);
}
}
}
requestPayload = stringBuilder.toString();
}
/**
* Override of the getInputStream() method which returns an InputStream that reads from the
* stored requestPayload string instead of from the request's actual InputStream.
*/
@Override
public ServletInputStream getInputStream ()
throws IOException {
final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(requestPayload.getBytes());
ServletInputStream inputStream = new ServletInputStream() {
public int read ()
throws IOException {
return byteArrayInputStream.read();
}
};
return inputStream;
}
}
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.engine.EngineConstants;
import org.osgi.framework.Constants;
import org.osgi.service.component.annotations.Component;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.jcr.Session;
import javax.servlet.*;
import java.io.IOException;
@Component(service = Filter.class,
immediate = true,
property = {
Constants.SERVICE_DESCRIPTION + "=Add the CUG userID to any UGC posts",
EngineConstants.SLING_FILTER_SCOPE + "=" + EngineConstants.FILTER_SCOPE_REQUEST,
Constants.SERVICE_RANKING + ":Integer=3000",
EngineConstants.SLING_FILTER_PATTERN + "=/content/forms/af/my-site.*"
})
public class DecorateUserGeneratedFilter implements Filter {
private static final Logger log = LoggerFactory.getLogger(DecorateUserGeneratedFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
final SlingHttpServletResponse slingResponse = (SlingHttpServletResponse ) response;
final SlingHttpServletRequest slingRequest= (SlingHttpServletRequest) request;
FormSubmitRequestWrapper wrappedRequest = new FormSubmitRequestWrapper(slingRequest);
log.info("starting ConfirmAlumniStatus workflow");
log.info(getCurrentUserId(slingRequest));
chain.doFilter(wrappedRequest, slingResponse);
}
@Override
public void destroy() {
}
public String getCurrentUserId(SlingHttpServletRequest request) {
ResourceResolver resolver = request.getResourceResolver();
Session session = resolver.adaptTo(Session.class);
String userId = session.getUserID();
return userId;
}
}
更新：我能够修复筛选器列组，使其700仍然给出IllegalStateException。使其3000使该问题消失。但是当从我的包装器调用request.getInputStream（）时，它返回null。正确的想法，错误的位置 简单的回答是，当您实现SlingHttpServletRequestWrapper时，如果您正在动态添加参数，它将提供对原始SlingHttpServletRequest的方法调用的默认处理。您要做的是确保覆盖与参数交互的方法，以便您可以确保因此，在初始化时，调用原始参数映射，将这些项复制到包含您自己的值的新映射中 然后超越任何请求这些值的方法
getParameter(String)
getParameterMap()
getParameterNames()
getParameterValues(String)
它允许您检测正在写入存储库的内容，并修改数据，使其像您的案例一样包含一个附加字段。正确的想法，错误的位置 简单的回答是，当您实现SlingHttpServletRequestWrapper时，如果您正在动态添加参数，它将提供对原始SlingHttpServletRequest的方法调用的默认处理。您要做的是确保覆盖与参数交互的方法，以便您可以确保因此，在初始化时，调用原始参数映射，将这些项复制到包含您自己的值的新映射中 然后超越任何请求这些值的方法
getParameter(String)
getParameterMap()
getParameterNames()
getParameterValues(String)
它允许您检测正在写入存储库的内容，并修改数据，使其像您的案例一样包含一个附加字段。您尝试执行的操作可能很简单，但对于新的AEM版本来说可能不是未来的证明 您需要完全控制工作流的触发方式！：