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NIFI-934: 

- Added a content viewer for image files.
This commit is contained in:
Matt Gilman 2015-09-18 18:17:12 -04:00
parent 600f91a262
commit d75c7b54e8
7 changed files with 192 additions and 0 deletions
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6
nifi-nar-bundles/nifi-image-bundle/nifi-image-nar/pom.xml
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@ -32,6 +32,12 @@
<artifactId>nifi-image-processors</artifactId>
<version>0.3.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-image-viewer</artifactId>
<version>0.3.1-SNAPSHOT</version>
<type>war</type>
</dependency>
</dependencies>
</project>

48
nifi-nar-bundles/nifi-image-bundle/nifi-image-viewer/pom.xml Executable file
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@ -0,0 +1,48 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-image-bundle</artifactId>
<version>0.3.1-SNAPSHOT</version>
</parent>
<artifactId>nifi-image-viewer</artifactId>
<description>NiFi image viewer</description>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-api</artifactId>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
</dependency>
<dependency>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>javax.servlet.jsp.jstl-api</artifactId>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
</dependency>
</dependencies>
</project>

52
nifi-nar-bundles/nifi-image-bundle/nifi-image-viewer/src/main/java/org/apache/nifi/web/ImageViewerController.java Executable file
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@ -0,0 +1,52 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.web;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(name = "ImageViewer", urlPatterns = {"/view-content"})
public class ImageViewerController extends HttpServlet {
/**
* Handles generating markup for viewing an image.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
final ViewableContent content = (ViewableContent) request.getAttribute(ViewableContent.CONTENT_REQUEST_ATTRIBUTE);
// handle images
if ("image/png".equals(content.getContentType()) || "image/jpeg".equals(content.getContentType()) || "image/gif".equals(content.getContentType())) {
// defer to the jsp
request.getRequestDispatcher("/WEB-INF/jsp/image.jsp").include(request, response);
} else {
final PrintWriter out = response.getWriter();
out.println("Unexpected content type: " + content.getContentType());
}
}
}

17
nifi-nar-bundles/nifi-image-bundle/nifi-image-viewer/src/main/webapp/META-INF/nifi-content-viewer Executable file
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@ -0,0 +1,17 @@
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
image/png
image/jpeg
image/gif

39
nifi-nar-bundles/nifi-image-bundle/nifi-image-viewer/src/main/webapp/WEB-INF/jsp/image.jsp Executable file
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@ -0,0 +1,39 @@
<%--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--%>
<%@ page contentType="text/html" pageEncoding="UTF-8" session="false" %>
<script type="text/javascript" src="../nifi/js/jquery/jquery-2.1.1.min.js"></script>
<style>
#image-holder {
position: absolute;
right: 50px;
bottom: 50px;
left: 100px;
top: 100px;
border: 1px solid #aaa;
overflow: auto;
background-color: #fff;
padding: 4px;
}
</style>
<div id="image-holder"></div>
<script type="text/javascript">
$(document).ready(function() {
var ref = $('#ref').text();
var imgElement = $('<img/>').attr('src', ref);
$('#image-holder').append(imgElement);
});
</script>

29
nifi-nar-bundles/nifi-image-bundle/nifi-image-viewer/src/main/webapp/WEB-INF/web.xml Executable file
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@ -0,0 +1,29 @@
<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>nifi-image-viewer</display-name>
<servlet>
<servlet-name>ImageViewer</servlet-name>
<servlet-class>org.apache.nifi.web.ImageViewerController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ImageViewer</servlet-name>
<url-pattern>/view-content</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>view-content</welcome-file>
</welcome-file-list>
</web-app>

1
nifi-nar-bundles/nifi-image-bundle/pom.xml
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@ -29,6 +29,7 @@
<modules>
<module>nifi-image-processors</module>
<module>nifi-image-nar</module>
<module>nifi-image-viewer</module>
</modules>
</project>