Changes between Version 60 and Version 61 of HashSourceCodes

Timestamp:

Mar 11, 2015, 8:58:53 AM (10 years ago)

Author:

os

Comment:

--

HashSourceCodes

@@ -1605 +1605 @@
 
 == Javascript ==
-Download [http://www.opensubtitles.org/addons/download/oshash-example.zip example]. Key is using Javascript LONG library. Thanks to [http://divhide.com/‎ Oscar Brito] for fixing the code. Check also https://github.com/ka2er/node-opensubtitles-api/blob/master/lib/opensubtitles.js#L36
-
-{{{
-//be sure Long.min.js is already included
-/*
- * Calculate OpenSubtitles hash
- * (Oscar Brito - aetheon@gmail.com)
- *
- * @param {File} file - a File obj contained on a DataTransfer
- * @param {Function} onComplete - the result callback
- */
-var OpenSubtitlesHash = function(file, onComplete){
-
-    var HASH_CHUNK_SIZE = 64 * 1024;
-    if(file.size<HASH_CHUNK_SIZE)
-        HASH_CHUNK_SIZE = file.size;
-
-
-    // sum chunk long values
-    var sumChunk = function(arrayBuffer){
-
-        var view = new DataView(arrayBuffer);
-        var hNumber = new dcodeIO.Long();
-
-        for(var i=0; i<arrayBuffer.byteLength; i+=8){
-
-            var low = view.getUint32(i, true);
-            var high = view.getUint32(i+4, true);
-
-            var n = new dcodeIO.Long(low, high);
-            hNumber = hNumber.add(n);
+There is some WRONG implementations floating around, please always check correct hash codes with test files at start of this document. This implementation works fine, credits go to Rasmus - THANKS!
+
+{{{
+function(file, callback) {
+    var HASH_CHUNK_SIZE = 65536, //64 * 1024
+        longs = [],
+        temp = file.size;
+
+    function read(start, end, callback) {
+        var reader = new FileReader();
+        reader.onload = function(e) {
+            callback.call(reader, process(e.target.result));
+        };
+
+        if (end === undefined) {
+            reader.readAsBinaryString(file.slice(start));
+        } else {
+            reader.readAsBinaryString(file.slice(start, end));
         }
-
-        return hNumber;
-
-    };
-
-
-    // read chunk
-    var readChunk = function(start, end, callback){
-
-        var reader = new FileReader();
-        reader.onload = function(e){ 
-            
-            // sum all long values on the chunk
-            var number = sumChunk(e.currentTarget.result);
-            
-            if(callback)
-                callback(number);
-
+    }
+
+    function process(chunk) {
+        for (var i = 0; i < chunk.length; i++) {
+            longs[(i + 8) % 8] += chunk.charCodeAt(i);
         }
-
-        var blob = file.slice(start, end);
-        reader.readAsArrayBuffer(blob);
-    };
-
-
-    // read the first chunk
-    readChunk(0, HASH_CHUNK_SIZE, function(head){
-
-        // read the tail chunk
-        var start = file.size-HASH_CHUNK_SIZE;
-        if(start < 0)
-            start = 0;
-
-        readChunk(start, file.size, function(tail){
-
-            // sum all values            
-            var sum = head.add(tail).add(new dcodeIO.Long(file.size));
-            // convert to hex
-            var sumHex = sum.toString(16);
-
-            if(onComplete) 
-                onComplete(sumHex);
-
+    }
+
+    function binl2hex(a) {
+        var b = 255,
+            d = '0123456789abcdef',
+            e = '',
+            c = 7;
+
+        a[1] += a[0] >> 8;
+        a[0] = a[0] & b;
+        a[2] += a[1] >> 8;
+        a[1] = a[1] & b;
+        a[3] += a[2] >> 8;
+        a[2] = a[2] & b;
+        a[4] += a[3] >> 8;
+        a[3] = a[3] & b;
+        a[5] += a[4] >> 8;
+        a[4] = a[4] & b;
+        a[6] += a[5] >> 8;
+        a[5] = a[5] & b;
+        a[7] += a[6] >> 8;
+        a[6] = a[6] & b;
+        a[7] = a[7] & b;
+        for (d, e, c; c > -1; c--) {
+            e += d.charAt(a[c] >> 4 & 15) + d.charAt(a[c] & 15);
+        }
+        return e;
+    }
+
+
+    for (var i = 0; i < 8; i++) {
+        longs[i] = temp & 255;
+        temp = temp >> 8;
+    }
+
+    read(0, HASH_CHUNK_SIZE, function() {
+        read(file.size - HASH_CHUNK_SIZE, undefined, function() {
+            callback.call(null, file, binl2hex(longs));
         });
-
     });
-    
-};
-                  
-
-// TODO
-$(document).ready(function() {
-        
-        $('#search_field').bind('drop', function(e, ev) {
-        e.preventDefault();
-                var files = e.originalEvent.dataTransfer.files;
-                $.each(files, function(index, file) {
-                        
-            OpenSubtitlesHash(file, function(hash){
-
-                // TODO
-                document.write(hash);
-
-            })
-
-                });
-        });
-
-});
+}
 
 }}}