Changes between Version 48 and Version 49 of HashSourceCodes

Timestamp:

Sep 25, 2013, 9:10:17 AM (11 years ago)

Author:

os

Comment:

--

HashSourceCodes

@@ -1603 +1603 @@
 
 == Javascript ==
-This implementation is WRONG, for files >= 2GB it counts WRONG hash, for example for dummy avi file it is '''61f7751ec2a72bfb''' instead '''61f7751fc2a72bfb''' - please send us correct code. Thanks!
-{{{
-                var b = 65536;        
-                fs = file.size;
-                                var e = Array(8);
-                            for (var a = fs, f = 0; f < 8; f++) {
-                                e[f] = a & 255;
-                                a = a >> 8
-                            }
-                            a = fs;    
-
-
+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.
+
+{{{
+//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);
+        }
+
+        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);
+
+        }
+
+        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);
+
+        });
+
+    });
+    
+};
+                  
+
+// TODO
+$(document).ready(function() {
+        
+        $('#search_field').bind('drop', function(e, ev) {
+        e.preventDefault();
+                var files = e.originalEvent.dataTransfer.files;
+                $.each(files, function(index, file) {
                         
-                            var c = file.slice(0, b);
-                            var g = new FileReader;   
-
-                                
-                            g.onloadend = function (h) {                                
-                                if (h.target.readyState == FileReader.DONE) {
-                                
-                                    for (var f = h.target.result, d = 0; d < f.length; d++) e[(d + 8) % 8] += f.charCodeAt(d);
-                                    c = file.slice(a - b);
-                                    var g = new FileReader;   
-                        
-                                    g.onloadend = function (c) {
-                                        var b = "languages";
-                                        if (c.target.readyState == FileReader.DONE) {
-                                            f = c.target.result;
-                                            for (d = 0; d < f.length; d++) e[(d + 8) % 8] += f.charCodeAt(d);  
-                                                                lang = $("#SubLanguageID").multiselect("getChecked").map(function(){return this.value}).get().join(",");
-                                                                if (lang == "") lang = "all";
-                                                                var url = "http://www.opensubtitles.org/" + $(location).attr('pathname').substr(1,2) + "/search/sublanguageid-" + lang + "/moviehash-" + binl2hex(e) + "/moviebytesize-" + fs + "/dragsearch-on";
-                                            document.location = url;
-                                        }
-                                    };
-                                    g.readAsBinaryString(c)
-                                }
-                            };
-                            g.readAsBinaryString(c)  
-
-function binl2hex(a) {
-    var b = 255;
-    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 (var d = "0123456789abcdef", e = "", c = 7; c > -1; c--) e += d.charAt(a[c] >> 4 & 15) + d.charAt(a[c] & 15);
-    return e
-}                 
-
-}}}
+            OpenSubtitlesHash(file, function(hash){
+
+                // TODO
+                document.write(hash);
+
+            })
+
+                });
+        });
+
+});
+
+}}}