From 38929aa1f4f4a017be4d2e93c32165b9e51f635d Mon Sep 17 00:00:00 2001
From: ulrich
Date: Tue, 21 Jul 2020 13:21:17 +0000
Subject: [PATCH] In Arbeit: PDF Theme
---
src/de/uhilger/wbx/web/TNServlet.java | 92 ++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 81 insertions(+), 11 deletions(-)
diff --git a/src/de/uhilger/wbx/web/TNServlet.java b/src/de/uhilger/wbx/web/TNServlet.java
index 198bced..9e58fa2 100644
--- a/src/de/uhilger/wbx/web/TNServlet.java
+++ b/src/de/uhilger/wbx/web/TNServlet.java
@@ -17,10 +17,15 @@
*/
package de.uhilger.wbx.web;
+import java.io.File;
import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
+import net.coobird.thumbnailator.Thumbnails;
import org.apache.catalina.servlets.DefaultServlet;
/**
@@ -28,14 +33,23 @@
* Miniaturansicht erzeugt werden, wie sie im Dateimanager
* der WebBox verwendet wird.
*
+ * Unterstuetzt werden die Varianten
+ * 120 (_tn), 240 (_kl), 500 (_dd), 700 (_mt), 1200 (_gr)
*/
public class TNServlet extends DefaultServlet {
+
+ private static final Logger logger = Logger.getLogger(TNServlet.class.getName());
/**
* Diese String-Konstanten noetigenfalls in eine
* Konfigurationsdatei auslagern
*/
- public static final String TN = "_tn";
+ public static final String TN = "_tn"; // 120
+ public static final String KL = "_kl"; // 240
+ public static final String SM = "_sm"; // 500
+ public static final String MT = "_mt"; // 700
+ public static final String GR = "_gr"; // 1200
+
public static final String JPG = ".jpg";
public static final String JPEG = ".jpeg";
public static final String PNG = ".png";
@@ -52,17 +66,73 @@
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
- String urlStr = request.getRequestURI();
- if(urlStr.contains(TN) && (urlStr.endsWith(JPG) || urlStr.endsWith(JPEG) || urlStr.endsWith(PNG))) {
- /*
- TODO: hier mit Hilfe der Klasse Bild eine Miniaturansicht erzeugen
- und in die Antwort schreiben
- */
- } else {
- super.doGet(request, response);
- }
-
+ String uriStr = request.getRequestURI();
+ String relname = uriStr.substring(request.getContextPath().length());
+ // --- Logausgabe Start
+ /*
+ File logurifile = new File(uriStr);
+ String loguriStr = uriStr.substring(request.getContextPath().length());
+ File logdir = new File(request.getServletContext().getRealPath("/"));
+ File imgfile = new File(logdir, loguriStr);
+ StringBuffer buf = new StringBuffer();
+ buf.append("contextPath: ");
+ buf.append(request.getContextPath());
+ buf.append("\n");
+ buf.append("realpath of /: ");
+ buf.append(request.getServletContext().getRealPath("/"));
+ buf.append("\n");
+ buf.append("urifile: ");
+ buf.append(logurifile.getAbsolutePath());
+ buf.append("\n");
+ buf.append("imgfile: ");
+ buf.append(imgfile.getAbsolutePath());
+ logger.fine(buf.toString());
+ //System.out.println("TNServlet uri parts " + buf.toString());
+ */
+ // --- Logausgabe Ende
+
+ if(uriStr.endsWith(JPG) || uriStr.endsWith(JPEG) || uriStr.endsWith(PNG)) {
+ File dir = new File(request.getServletContext().getRealPath("/"));
+ String suburiStr = uriStr.substring(request.getContextPath().length());
+ File imgfile = new File(dir, suburiStr);
+ if(uriStr.contains(TN)) {
+ bildErzeugen(dir, relname, TN, 120, imgfile);
+ } else if(uriStr.contains(KL)) {
+ bildErzeugen(dir, relname, KL, 240, imgfile);
+ } else if(uriStr.contains(SM)) {
+ bildErzeugen(dir, relname, SM, 500, imgfile);
+ } else if(uriStr.contains(MT)) {
+ bildErzeugen(dir, relname, MT, 700, imgfile);
+ } else if(uriStr.contains(GR)) {
+ bildErzeugen(dir, relname, GR, 1200, imgfile);
+ }
+ }
+ super.doGet(request, response);
}
+ private void bildErzeugen(File dir, String relname, String indicator, int gr, File tnfile)
+ throws UnsupportedEncodingException, IOException {
+ //File dir = new File(request.getServletContext().getRealPath("/"));
+ // System.out.println("TNServlet dir: " + dir);
+ relname = relname.replace(indicator, "");
+ // System.out.println("TNServlet bildAusgeben relname: " + relname);
+ // relname: /test/img/IMG_0524.png
+ File imgfile = new File(dir, URLDecoder.decode(relname, "utf-8"));
+
+ // 120, 240, 500, 700, 1200
+
+ /*Thumbnails.of(imgfile)
+ .size(gr, gr)
+ .keepAspectRatio(true)
+ .outputQuality(0.7)
+ .toOutputStream(response.getOutputStream());*/
+ if(imgfile.exists() && !tnfile.exists()) {
+ Thumbnails.of(imgfile)
+ .size(gr, gr)
+ .keepAspectRatio(true)
+ .outputQuality(0.7)
+ .toFile(tnfile);
+ }
+ }
}
--
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