diff --git a/swh/web/ui/static/js/filedrop.js b/swh/web/ui/static/js/filedrop.js
deleted file mode 100644
--- a/swh/web/ui/static/js/filedrop.js
+++ /dev/null
@@ -1,194 +0,0 @@
-/**
- *  Search page management
- */
-
-
-$.fn.extend({
-    /**
-     *  Call on any HTMLElement to make that element the recipient of files
-     *  drag & dropped into it.
-     *  Files then have their sha1 checksum calculated
-     *  and searched in SWH.
-     *  Args:
-     *     resultDiv: the table where the result should be displayed
-     *     errorDiv: the element where the error message should be displayed
-     */
-    filedrop: function(fileLister, searchForm) {
-
-        return this.each(function() {
-
-            var dragwin = $(this);
-            var fileshovering = false;
-
-            dragwin.on('dragover', function(event) {
-                event.stopPropagation();
-                event.preventDefault();
-            });
-
-            dragwin.on('dragenter', function(event) {
-                event.stopPropagation();
-                event.preventDefault();
-                if (!fileshovering) {
-                    dragwin.css("border-style", "solid");
-                    dragwin.css("box-shadow", "inset 0 3px 4px");
-                    fileshovering = true;
-                }
-            });
-
-            dragwin.on('dragover', function(event) {
-                event.stopPropagation();
-                event.preventDefault();
-                if (!fileshovering) {
-                    dragwin.css("border-style", "solid");
-                    dragwin.css("box-shadow", "inset 0 3px 4px");
-                    fileshovering = true;
-                }
-            });
-
-            dragwin.on('dragleave', function(event) {
-                event.stopPropagation();
-                event.preventDefault();
-                if (fileshovering) {
-                    dragwin.css("border-style", "dashed");
-                    dragwin.css("box-shadow", "none");
-                    fileshovering = false;
-                }
-            });
-            
-            dragwin.on('drop', function(event) {
-                event.stopPropagation();
-                event.preventDefault();
-                if (fileshovering) {
-                    dragwin.css("border-style", "dashed");
-                    dragwin.css("box-shadow", "none");
-                    fileshovering = false;
-                }
-                var myfiles = event.originalEvent.dataTransfer.files;
-                if (myfiles.length >= 1) {
-                    handleFiles(myfiles, fileLister, searchForm);
-                }
-            });
-        });
-    },
-    /**
-     *  Call on a jQuery-selected input to make it sensitive to
-     *  the reception of new files, and have it process received
-     *  files.
-     *  Args:
-     *     fileLister: the element keeping track of the files
-     *     searchForm: the form whose submission will POST the file
-     *                 information
-     */
-    filedialog: function(fileLister, searchForm) {
-        return this.each(function() {
-            var elem = $(this);
-            elem.on('change', function(){
-                handleFiles(this.files, fileLister, searchForm);
-            });
-        });
-    },
-    /**
-     *  Call on a jQuery-selected element to delegate its click
-     *  event to the given input instead.
-     *  Args:
-     *     input: the element to be clicked when the caller is clicked.
-     */
-    inputclick: function(input) {
-        return this.each(function() {
-            $(this).click(function(event) {
-                event.preventDefault();
-                input.click();
-            });
-        });
-    },
-    /**
-     *  Call on a form to intercept its submission event and 
-     *  check the validity of the text input if present before submitting
-     *  the form.
-     *  Args:
-     *     textInput: the input to validate
-     *     messageElement: the element where the warning will be written
-     */
-    checkSubmission: function(textInput, messageElement) {
-        var CHECKSUM_RE = /^([0-9a-f]{40}|[0-9a-f]{64})$/i;
-        $(this).submit(function(event) {
-            event.preventDefault();
-            var q = textInput.val();
-            if (q && !q.match(CHECKSUM_RE)) {
-                messageElement.empty();
-                messageElement.html('Please enter a valid SHA-1');
-            } else {
-                searchForm.submit();
-            }
-        });
-    }
-});
-
-
-var nameList = []; /** Avoid adding the same file twice      **/
-
-/** 
- *  Start reading the supplied files to hash them and add them to the form,
- *  and add  their names to the file lister pre-search.
- *  Args:
- *     myfiles: the file array
- *     fileLister: the element that will receive the file names
- *     searchForm: the form to which we add hidden inputs with the 
- *     correct values
- */
-function handleFiles(myfiles, fileLister, searchForm) {
-    for (var i = 0; i < myfiles.length; i++) {
-        var file = myfiles.item(i);
-        if (nameList.indexOf(file.name) == -1) {
-            nameList.push(file.name);
-            var fr = new FileReader();
-            fileLister.append(make_row(file.name));
-            bind_reader(fr, file.name, searchForm);
-            fr.readAsArrayBuffer(file);
-        }
-    }
-};
-
-/**
- *  Bind a given FileReader to hash the file contents when the file
- *  has been read
- *  Args:
- *     filereader: the FileReader object
- *     filename: the name of the file being read by the FileReader
- *     searchForm: the form the corresponding hidden input will be
- *     appended to
- */
-function bind_reader(filereader, filename, searchForm) {
-    filereader.onloadend = function(evt) {
-        if (evt.target.readyState == FileReader.DONE){
-            return fileReadDone(evt.target.result, filename, searchForm);
-        }
-    };
-}
-
-function make_row(name) {
-    return "<div class='span3'>"+name+"</div>";
-}
-
-/**
- *  Hash the buffer contents with CryptoJS's SHA1 implementation, and
- *  append the result to the given form for submission.
- *  Args:
- *     buffer: the buffer to be hashed
- *     fname: the file name corresponding to the buffer
- *     searchForm: the form the inputs should be appended to
- */
-function fileReadDone(buffer, fname, searchForm) {
-    var wordArray = CryptoJS.lib.WordArray.create(buffer);
-    var sha1 = CryptoJS.SHA1(wordArray);
-    /**
-    var git_hd = "blob " + wordArray.length + "\0";
-    var git_Array = CryptoJS.enc.utf8.parse(git_hd).concat(wordArray);
-    var sha256 = CryptoJS.SHA256(wordArray);
-    var sha1_git = CryptoJS.SHA1(wordArray);
-    **/
-    searchForm.append($("<input>", {type: "hidden",
-                                    name: fname,
-                                    value: sha1}
-                       ));
-}
diff --git a/swh/web/ui/static/js/search.js b/swh/web/ui/static/js/search.js
new file mode 100644
--- /dev/null
+++ b/swh/web/ui/static/js/search.js
@@ -0,0 +1,242 @@
+/**
+ *  Search page management
+ *  Args:
+ *     textForm: the form containing the text input, if any
+ *     fileForm: the form containing the file input, if any
+ *     messageElem: the element that should display search messages
+ */
+var SearchFormController = function(textForm, fileForm, messageElem)
+
+{
+    this.textForm = textForm;
+    this.fileForm = fileForm;
+    this.messageElem = messageElem;
+
+    // List of hashes to check against files being processed
+    this.hashed_already = {
+        'sha1': {},
+        'sha256': {},
+        'sha1_git': {}
+    };
+    this.algos = ['sha1', 'sha256', 'sha1_git'];
+    this.CHECKSUM_RE = /^([0-9a-f]{40}|[0-9a-f]{64})$/i;
+    var self = this;
+
+    /**
+     *  Show search messages on the page
+     *  Args:
+     *    msg: the message to show
+     */
+    this.searchMessage = function(msg) {
+        self.messageElem.empty();
+        self.messageElem.text(msg);
+    };
+
+    /**
+     *  Setup the text field 
+     *  Args:
+     *    textFormInput: the text form's input
+     */
+    this.setupTextForm = function(textFormInput) {
+        self.textForm.submit(function(event) {
+            var q = textFormInput.val();
+            if (!q) {
+		event.preventDefault();
+                self.searchMessage("Please enter a SHA-1 or SHA-256 checksum.");
+	    }
+            else if (q && !q.match(self.CHECKSUM_RE)) {
+                event.preventDefault();
+                self.searchMessage("Invalid SHA-1 or SHA-256 checksum");
+            }
+        });
+    };
+
+    /** 
+     *  Setup the file drag&drop UI and hashing support.
+     *  Args:
+     *    fileDropElem: the element receptive to drag & drop
+     *    hashedListerElem: the element that receives the hased file descriptions
+     *    fileFormInput: the input that actually receives files
+     *    clearButton: the button used to clear currently hashed files
+     */
+    this.setupFileForm = function(fileDropElem, hashedListerElem, fileFormInput, clearButton) {
+	if (!FileReader || !CryptoJS) {
+	    self.searchMessage("Client-side file hashing is not available for your browser.");
+	    return;
+	}
+	    
+	// Enable clicking on the text element for file picker
+	fileDropElem.click(function(event) {
+	    event.preventDefault();
+            fileFormInput.click();
+        });
+	
+	// Enable drag&drop
+        var makeDroppable = function(fileReceptionElt) {
+            var fileshovering = false;
+
+            fileReceptionElt.on('dragover', function(event) {
+                event.stopPropagation();
+                event.preventDefault();
+            });
+
+            fileReceptionElt.on('dragenter', function(event) {
+                event.stopPropagation();
+                event.preventDefault();
+                if (!fileshovering) {
+                    fileReceptionElt.css("border-style", "solid");
+                    fileReceptionElt.css("box-shadow", "inset 0 3px 4px");
+                    fileshovering = true;
+                }
+            });
+
+            fileReceptionElt.on('dragover', function(event) {
+                event.stopPropagation();
+                event.preventDefault();
+                if (!fileshovering) {
+                    fileReceptionElt.css("border-style", "solid");
+                    fileReceptionElt.css("box-shadow", "inset 0 3px 4px");
+                    fileshovering = true;
+                }
+            });
+
+            fileReceptionElt.on('dragleave', function(event) {
+                event.stopPropagation();
+                event.preventDefault();
+                if (fileshovering) {
+                    fileReceptionElt.css("border-style", "dashed");
+                    fileReceptionElt.css("box-shadow", "none");
+                    fileshovering = false;
+                }
+            });
+
+            fileReceptionElt.on('drop', function(event) {
+                event.stopPropagation();
+                event.preventDefault();
+                if (fileshovering) {
+                    fileReceptionElt.css("border-style", "dashed");
+                    fileReceptionElt.css("box-shadow", "none");
+                    fileshovering = false;
+                }
+                var myfiles = event.originalEvent.dataTransfer.files;
+                readAndHash(myfiles);
+            });
+        };
+	makeDroppable(fileDropElem);
+	
+	// Connect input change and rehash
+	var makeInputChange = function(fileInput) {
+	    return fileInput.each(function() {
+		$(this).on('change', function(){
+		    readAndHash(this.files);
+		});
+	    });
+	};
+	makeInputChange(fileFormInput);
+	
+	// Connect clear button
+	var makeClearButton = function(button) {
+	    return button.each(function() {
+		$(this).click(function(event) {
+		    event.preventDefault();
+		    hashedListerElem.empty();
+		    self.fileForm.children('.search-hidden').remove();
+		    self.hashed_already = {
+			'sha1': {},
+			'sha256': {},
+			'sha1_git': {}
+		    };
+		});
+	    });
+	};
+	makeClearButton(clearButton);
+
+        var readAndHash = function(filelist) {
+            for (var file_idx = 0; file_idx < filelist.length; file_idx++) {
+                var file = filelist.item(file_idx);
+                var fr = new FileReader();
+                bindReader(fr, file.name);
+                fr.readAsArrayBuffer(file);
+            }
+        };
+
+        var bindReader = function(freader, fname) {
+            freader.onloadend = function(event) {
+                if (event.target.readyState == FileReader.DONE)
+                    return dedupAndAdd(event.target.result, fname);
+                else
+                    return null;
+            };
+        };
+
+	/**
+	 *  Hash the buffer with SHA-1, SHA-1_GIT, SHA-256
+	 *  Args:
+	 *     buffer: the buffer to hash
+	 *     fname: the file name corresponding to the buffer
+	 *  Returns:
+	 *     a dict of algo_hash: hash
+	 */
+        var hashBuffer = function (buffer, fname) {
+            function str2ab(header) {
+                var buf = new ArrayBuffer(header.length);
+                var view = new Uint8Array(buf); // byte view, all we need is ASCII
+                for (var idx = 0, len=header.length; idx < len; idx++)
+                    view[idx] = header.charCodeAt(idx);
+                return buf;
+            }
+
+            var content_array = CryptoJS.lib.WordArray.create(buffer);
+            var git_hd_str = 'blob ' + buffer.byteLength + '\0';
+            var git_hd_buffer = str2ab(git_hd_str);
+            var git_hd_array = CryptoJS.lib.WordArray.create(git_hd_buffer);
+
+            var sha1 = CryptoJS.SHA1(content_array);
+            var sha256 = CryptoJS.SHA256(content_array);
+            var sha1_git = CryptoJS.SHA1(git_hd_array.concat(content_array));
+            return {
+                'sha1': sha1 + '',
+                'sha256': sha256 + '',
+                'sha1_git': sha1_git + ''
+            };
+        };
+
+	/**
+	 *  Hash the buffer and add it to the form if it is unique
+	 *  If not, display which file has the same content
+	 *  Args:
+	 *     buffer: the buffer to hash
+	 *     fname: the file name corresponding to the buffer
+	 */ 
+        var dedupAndAdd = function(buffer, fname) {
+            var hashes = hashBuffer(buffer);
+            var has_duplicate = false;
+	    for (var algo_s in hashes) {
+                if (self.hashed_already[algo_s][hashes[algo_s]] != undefined) {
+		    // Duplicate content -- fileLister addition only, as duplicate
+                    hashedListerElem.append($('<div>')
+                                                .addClass('span3')
+                                                .text(fname + ': duplicate of ' + self.hashed_already[algo_s][hashes[algo_s]]));
+                    has_duplicate = true;
+                    break;
+                }
+	    }
+            // First file read with this content -- fileLister and form addition
+            if (!has_duplicate) {
+                // Add to hashed list
+                for (var algo_c in self.hashed_already)
+                    self.hashed_already[algo_c][hashes[algo_c]] = fname;
+                hashedListerElem.append($('<div>')
+                                        .addClass('span3')
+                                        .text(fname));
+                var hashstring = JSON.stringify(hashes).replace('\"', '\'');
+                self.fileForm.append($("<input>", {type: 'hidden',
+						   class: 'search-hidden',
+                                                   name: fname,
+                                                   value: hashes['sha1']}// hashstring}
+                                      ));
+
+            }
+        };
+    };
+};
diff --git a/swh/web/ui/static/lib/jquery.js b/swh/web/ui/static/lib/jquery.js
deleted file mode 120000
--- a/swh/web/ui/static/lib/jquery.js
+++ /dev/null
@@ -1 +0,0 @@
-/usr/share/javascript/jquery-flot/jquery.js
\ No newline at end of file
diff --git a/swh/web/ui/templates/search.html b/swh/web/ui/templates/search.html
--- a/swh/web/ui/templates/search.html
+++ b/swh/web/ui/templates/search.html
@@ -2,66 +2,93 @@
 {% block title %}Search SWH{% endblock %}
 {% block content %}
 
-<!-- CryptoJS assumed to be installed as a debian package -->
 <script src="{{ url_for('static', filename='lib/core.js') }}"></script>
 <script src="{{ url_for('static', filename='lib/lib-typedarrays.js') }}"></script>
 <script src="{{ url_for('static', filename='lib/sha1.js') }}"></script>
 <script src="{{ url_for('static', filename='lib/sha256.js') }}"></script>
-<script src="{{ url_for('static', filename='js/filedrop.js') }}"></script>
+<script src="{{ url_for('static', filename='js/search.js') }}"></script>
+
 <div class="container">
-  <form id="searchForm"
+  <!-- The text-based SHA1 or SHA256 search -->
+  <h1 class="label label-default">Search with SHA-1 or SHA-256:</h1>
+  <form id="text-hash-form"
 	action="{{ url_for('search') }}"
 	class="form"
+        method="get">
+    <br/>
+    <div class="input-group">
+      <input id="text-hash-input"
+	     type="text" class="form-control"
+	     name="q"
+	     placeholder="SHA-1 or SHA-256 checksum" />
+      <span class="input-group-btn">
+        <button id="text-hash-submit"
+		class="btn btn-primary"
+		type="submit">
+	  Text search
+	</button>
+      </span>
+    </div>
+  </form>
+
+  <!-- The file-based drag&drop UI-->
+  <h1 class="label label-default">Search with files</h1>
+  <form id="file-hash-form"
+	action="{{ url_for('search') }}"
+	class="text-center form"
         method="post"
         enctype="multipart/form-data">
-    <div class="form-group">
-      <label for="sha1_textinput">Search with SHA-1 or SHA-256:</label>
-      <br/>
-      <div id="textinput" class="input-group">
-	<input id="sha1_textinput"
-	       type="text" class="form-control"
-	       name="q"
-	       placeholder="SHA-1 or SHA-256 checksum" />
-      </div>
-    </div>
-    <div id="filesinput" class="input-group">
-      <label for="fileElem">Search with files</label>
-      <div id="fileinput" class="container text-center" style="border: 1px dashed black">
-	Drag and drop or click here to hash files and search for them.
-	Your files will NOT be uploaded, hashing is done locally.
-	Filesizes over 20Mb may be slow to process, use with care.
-	<div id="filelist" class="row">
-	</div>
-      </div>
+
+    <!--Form input -->
+    <input type="file"
+	   id="file-hash-input"
+	   class="form-control"
+	   multiple
+	   name="filename"
+           value=""
+	   style="display:none"
+           placeholder="File(s) to hash and search" />
+    <div id="file-drop" class="container text-center" style="border: 1px dashed black">
+      Drag and drop or click here to hash files and search for them.
+      Your files will NOT be uploaded, hashing is done locally.
+      Filesizes over 20Mb may be slow to process, use with care.
+      <div id="filelist" class="row"></div>
     </div>
-    <div class="text-center" style="margin-top: 10px">
-      <button id="submitall" type="submit" class="btn btn-primary">
-	<span class="glyphicon glyphicon-search" aria-hidden="true"></span>
+    
+    <!-- Form buttons -->
+    <div class="btn-group" style="margin-top: 10px">
+      <button id="file-hash-submission" type="submit" class="btn btn-primary">
+	<span class="glyphicon glyphicon-search" type="submit" aria-hidden="true"></span>
 	Search
       </button>
+      <button id="file-hash-clear" class="btn btn-primary">
+	Clear
+	<span class="glyphicon glyphicon-erase" aria-hidden="true"></span>
+      </button>
     </div>
   </form>
-  <input type="file"
-	 id="fileElem"
-	 class="form-control"
-	 multiple
-	 name="filename"
-         value=""
-	 style="display:none"
-         placeholder="File(s) to upload, hash and search for SHA-1 or SHA-256 checksum" />
-  <div id="swh-search-message" class="message">
-  </div>
+
+  <div id="search-message" class="message"></div>
+  
+  <!-- Search forms setup -->
+  <script>
+    var sfc = new SearchFormController($('#text-hash-form'), $('#file-hash-form'), $('#search-message'));
+    sfc.setupTextForm($('#text-hash-input'));
+    sfc.setupFileForm($('#file-drop'),$('#filelist'),$('#file-hash-input'),$('#file-hash-clear'));
+  </script>
+
   {% if search_res is not none %}
+  <!-- Search result display -->
       {% if search_stats is not none %}
-      <label id="stats">
+      <label class="search-stats">
          Files available in SWH: {{ '%.2f' | format(search_stats['pct']) }}% of
          {{ search_stats['nbfiles'] }} files.
       </label>
       {% endif %}
-  <table id="results" class="table table-striped">
+  <table class="table table-striped search-res">
     <thead class="thead-default">
       <th>File name</th>
-      <th>SHA1 checksum</th>
+      <th>SHA256 checksum</th>
       <th>Result</th>
     </thead>
     {% for res in search_res %}
@@ -82,23 +109,9 @@
     {% endfor %}
   </table>
   {% endif %}
-  {% if message is not none %}
+  {% if message is not none and message != '' %}
     <div class="span8">{{ message | safe }}</div>
   </div>
   {% endif %}
-  <!-- jQuery setup -->
-  <div id="test"></div>
-  <script>
-    var form = $('#searchForm');
-    var filelist = $('#filelist');
-    // Delegate dropbox click
-    $('#fileinput').inputclick($('#fileElem'));
-    // Make the dropbox available for drag & drop
-    $('#fileElem').filedialog(filelist, form);
-    // Make the submission button receptive to files
-    $('#fileinput').filedrop(filelist, form);
-    // Check the text input before submission
-    form.checkSubmission($('#sha1_textinput'), $('#swh-search-message'));
-  </script>
 </div>
 {% endblock %}