allow/display svg images in image results previews

svg is not supported by awt but by most browser. Image content is delivered as received (without size adjustment)

htroot/ViewImage.java

@@ -136,8 +136,11 @@ public class ViewImage {
             // gif images are not loaded because of an animated gif bug within jvm which sends java into an endless loop with high CPU
             if (ext.equals("gif") && "gif".equals(MultiProtocolURL.getFileExtension(url.getFileName()))) {
                 return new ByteArrayInputStream(resourceb);
+            } else if (ext.equals("svg") && "svg".equals(MultiProtocolURL.getFileExtension(url.getFileName()))) {
+                // svg images not supported by awt, but by most browser, deliver just content (without crop/scale)
+                return new ByteArrayInputStream(resourceb);
             }
-           
+
             // read image
             image = ImageParser.parse(urlString, resourceb);
             if (image == null) {

htroot/yacysearchitem.java

@@ -308,16 +308,15 @@ public class yacysearchitem {
             // image search; shows thumbnails
 
             prop.put("content", theSearch.query.contentdom.getCode() + 1); // switch on specific content
-            SearchEvent.ImageResult image = null;
             try {
-                image = theSearch.oneImageResult(item, timeout);
+                SearchEvent.ImageResult image = theSearch.oneImageResult(item, timeout);
                 final String imageUrlstring = image.imageUrl.toNormalform(true);
                 final String imageUrlExt = MultiProtocolURL.getFileExtension(image.imageUrl.getFileName());
                 final String target = sb.getConfig(imageUrlstring.matches(target_special_pattern) ? SwitchboardConstants.SEARCH_TARGET_SPECIAL : SwitchboardConstants.SEARCH_TARGET_DEFAULT, "_self");
 
                 final String license = URLLicense.aquireLicense(image.imageUrl); // this is just the license key to get the image forwarded through the YaCy thumbnail viewer, not an actual lawful license
                 //sb.loader.loadIfNotExistBackground(image.imageUrl, 1024 * 1024 * 10, null, ClientIdentification.yacyIntranetCrawlerAgent);
-                prop.putHTML("content_item_hrefCache", "/ViewImage." + ("gif".equals(imageUrlExt) ? "gif" : "png") + "?maxwidth=128&maxheight=128&code="+license+"&isStatic=true&quadratic=&url=" + imageUrlstring);
+                prop.putHTML("content_item_hrefCache", "ViewImage." + ("gif.png.svg".contains(imageUrlExt) ? imageUrlExt : "png") + "?maxwidth=128&maxheight=128&code="+license+"&isStatic=true&quadratic=&url=" + imageUrlstring);
                 prop.putHTML("content_item_href", imageUrlstring);
                 prop.putHTML("content_item_target", target);
                 prop.put("content_item_code", license);

source/net/yacy/cora/document/analysis/Classification.java

@@ -91,10 +91,10 @@ public class Classification {
         final String apps = "7z,ace,arc,arj,apk,asf,asx,bat,bin,bkf,bz2,cab,com,css,dcm,deb,dll,dmg,exe,java,gho,ghs,gz,hqx,img,iso,jar,lha,rar,sh,sit,sitx,tar,tbz,tgz,tib,torrent,vbs,war,zip";
         final String audio = "aac,aif,aiff,flac,m4a,m4p,mid,mp2,mp3,oga,ogg,ram,sid,wav,wma";
         final String video = "3g2,3gp,3gp2,3gpp,3gpp2,3ivx,asf,asx,avi,div,divx,dv,dvx,env,f4v,flv,hdmov,m1v,m4v,m-jpeg,mkv,moov,mov,movie,mp2v,mp4,mpe,mpeg,mpg,mpg4,mv4,ogm,ogv,qt,rm,rv,vid,swf,webm,wmv";
-        final String image = "ai,bmp,cdr,cmx,emf,eps,gif,img,jpeg,jpg,mng,pct,pdd,pdn,pict,png,psb,psd,psp,tif,tiff,wmf";
+        final String image = "ai,bmp,cdr,cmx,emf,eps,gif,img,jpeg,jpg,mng,pct,pdd,pdn,pict,png,psb,psd,psp,svg,tif,tiff,wmf";
         final String ctrl = "sha1,md5,crc32,sfv";
 
-        addSet(textExtSet, text); // image formats
+        addSet(textExtSet, text); // text formats
         addSet(imageExtSet, image); // image formats
         addSet(audioExtSet, audio); // audio formats
         addSet(videoExtSet, video); // video formats