Add url input field as source for WarcImporter

allowing to import warc from url without prior download.

htroot/IndexImportWarc_p.html

@@ -22,13 +22,16 @@
           You can download warc archives for example here 
           <a href="https://archive.org/search.php?query=subject%3A%22warcarchives%22&and[]=subject%3A%22warcarchives%22" target="_blank">Internet Archive</a>.
         </p>
-        <div class="input-group">
-          <span style="display: inline-block">
-            <input name="file" type="file" value="" size="75" /></span>
-          <div class="btn-group">
-            <input name="submit" class="btn btn-primary" type="submit" value="Import Warc File" />
-          </div>
-        </div>       
+        <dl>
+          <dt class="TableCellDark"><label for="file">File:</label></dt>
+          <dd><input name="file" id="file" type="file" value="" size="75" /></dd>
+          <dt></dt>
+          <dd>or</dd>
+          <dt class="TableCellDark"><label for="url">Url:</label></dt>
+          <dd><input name="url" id="url" value="" size="75"/></dd>
+          <dt></dt>
+          <dd><input name="submit" class="btn btn-primary" type="submit" value="Import Warc File" /></dd>
+        </dl>
       </fieldset>
     </form>
 

htroot/IndexImportWarc_p.java

@@ -18,6 +18,10 @@
 
 import java.io.File;
 import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import net.yacy.cora.document.id.MultiProtocolURL;
+import net.yacy.cora.protocol.ClientIdentification;
 
 import net.yacy.cora.protocol.RequestHeader;
 import net.yacy.document.importer.WarcImporter;
@@ -45,23 +49,42 @@ public class IndexImportWarc_p {
         } else {
             prop.put("import", 0);
             if (post != null) {
-                if (post.containsKey("file")) {
-                    String file = post.get("file");
-                    final File sourcefile = new File(file);
+                if (post.containsKey("file") || post.containsKey("url")) {
+                    String filename = post.get("file");
+                    if (filename != null && filename.length() > 0) {
+                        final File sourcefile = new File(filename);
                         if (sourcefile.exists()) {
                             try {
                                 WarcImporter wi = new WarcImporter(sourcefile);
                                 wi.start();
                                 prop.put("import_thread", "started");
                             } catch (FileNotFoundException ex) {
-                            prop.put("import_thread", "Error: file not found [" + file + "]");
+                                prop.put("import_thread", "Error: file not found [" + filename + "]");
                             }
-                        prop.put("import_warcfile", file);
+                            prop.put("import", 1);
+                            prop.put("import_warcfile", filename);
                         } else {
                             prop.put("import_warcfile", "");
-                        prop.put("import_thread", "Error: file not found [" + file + "]");
+                            prop.put("import_thread", "Error: file not found [" + filename + "]");
+                        }
+                    } else {
+                        String urlstr = post.get("url");
+                        if (urlstr != null && urlstr.length() > 0) {
+                            try {
+                                MultiProtocolURL url = new MultiProtocolURL(urlstr);
+                                WarcImporter wi = new WarcImporter(url.getInputStream(ClientIdentification.yacyInternetCrawlerAgent), urlstr);
+                                wi.start();
+                                prop.put("import_thread", "started");
+                            } catch (MalformedURLException ex) {
+                                prop.put("import_thread", ex.getMessage());
+                            } catch (IOException ex) {
+                                prop.put("import_thread", ex.getMessage());
                             }
                             prop.put("import", 1);
+                            prop.put("import_warcfile", urlstr);
+                        }
+                    }
+
                     prop.put("import_count", 0);
                     prop.put("import_speed", 0);
                     prop.put("import_runningHours", 0);

source/net/yacy/document/importer/WarcImporter.java

@@ -73,6 +73,18 @@ public class WarcImporter extends Thread implements Importer {
         sourceSize = -1;
     }
 
+    /**
+     * Init the WarcImporter with input stream with a informational filename or
+     * url als info for calls to the importer methode source() which returns
+     * the urlinfo. Otherwise this methode is equivalent to WarchImporter(inputstream)
+     * @param f the input stream to read the warc archive from
+     * @param urlinfo a info like the url or the filename
+     */
+    public WarcImporter (InputStream f, String urlinfo) {
+        this(f);
+        name = urlinfo;
+    }
+
     public WarcImporter(File f) throws FileNotFoundException{
        name = f.getName();
        sourceSize = f.length();