michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0:  */
michael@0: 
michael@0: function BinaryComparer(file, callback) {
michael@0:   var fstream = Cc["@mozilla.org/network/file-input-stream;1"].
michael@0:                 createInstance(Ci.nsIFileInputStream);
michael@0:   fstream.init(file, -1, 0, 0);
michael@0:   this.length = file.fileSize;
michael@0:   this.fileStream = Cc["@mozilla.org/binaryinputstream;1"].
michael@0:                     createInstance(Ci.nsIBinaryInputStream);
michael@0:   this.fileStream.setInputStream(fstream);
michael@0:   this.offset = 0;
michael@0:   this.callback = callback;
michael@0: }
michael@0: 
michael@0: BinaryComparer.prototype = {
michael@0:   fileStream: null,
michael@0:   offset: null,
michael@0:   length: null,
michael@0:   callback: null,
michael@0: 
michael@0:   onStartRequest: function(aRequest, aContext) {
michael@0:   },
michael@0: 
michael@0:   onStopRequest: function(aRequest, aContext, aStatusCode) {
michael@0:     this.fileStream.close();
michael@0:     do_check_eq(aStatusCode, Components.results.NS_OK);
michael@0:     do_check_eq(this.offset, this.length);
michael@0:     this.callback();
michael@0:   },
michael@0: 
michael@0:   onDataAvailable: function(aRequest, aContext, aInputStream, aOffset, aCount) {
michael@0:     var stream = Cc["@mozilla.org/binaryinputstream;1"].
michael@0:                  createInstance(Ci.nsIBinaryInputStream);
michael@0:     stream.setInputStream(aInputStream);
michael@0:     var source, actual;
michael@0:     for (var i = 0; i < aCount; i++) {
michael@0:       try {
michael@0:         source = this.fileStream.read8();
michael@0:       }
michael@0:       catch (e) {
michael@0:         do_throw("Unable to read from file at offset " + this.offset + " " + e);
michael@0:       }
michael@0:       try {
michael@0:         actual = stream.read8();
michael@0:       }
michael@0:       catch (e) {
michael@0:         do_throw("Unable to read from converted stream at offset " + this.offset + " " + e);
michael@0:       }
michael@0:       if (source != actual)
michael@0:         do_throw("Invalid value " + actual + " at offset " + this.offset + ", should have been " + source);
michael@0:       this.offset++;
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: function comparer_callback()
michael@0: {
michael@0:   do_test_finished();
michael@0: }
michael@0: 
michael@0: function run_test()
michael@0: {
michael@0:   var source = do_get_file(DATA_DIR + "test_bug399727.html");
michael@0:   var comparer = new BinaryComparer(do_get_file(DATA_DIR + "test_bug399727.zlib"),
michael@0:                                     comparer_callback);
michael@0:   
michael@0:   // Prepare the stream converter
michael@0:   var scs = Cc["@mozilla.org/streamConverters;1"].
michael@0:             getService(Ci.nsIStreamConverterService);
michael@0:   var converter = scs.asyncConvertData("uncompressed", "deflate", comparer, null);
michael@0: 
michael@0:   // Open the expected output file
michael@0:   var fstream = Cc["@mozilla.org/network/file-input-stream;1"].
michael@0:                 createInstance(Ci.nsIFileInputStream);
michael@0:   fstream.init(source, -1, 0, 0);
michael@0: 
michael@0:   // Set up a pump to push data from the file to the stream converter
michael@0:   var pump = Cc["@mozilla.org/network/input-stream-pump;1"].
michael@0:              createInstance(Ci.nsIInputStreamPump);
michael@0:   pump.init(fstream, -1, -1, 0, 0, true);
michael@0:   pump.asyncRead(converter, null);
michael@0:   do_test_pending();
michael@0: }