////  FileResourceRequest.cpp//  libraries/networking/src////  Created by Ryan Huffman on 2015/07/23//  Copyright 2015 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "FileResourceRequest.h" #include <cstdlib> #include <QFile> void FileResourceRequest::doSend() {    QString filename = _url.toLocalFile();        // sometimes on windows, we see the toLocalFile() return null,    // in this case we will attempt to simply use the url as a string    if (filename.isEmpty()) {        filename = _url.toString();    }     if (!_byteRange.isValid()) {        _result = ResourceRequest::InvalidByteRange;    } else {        QFile file(filename);        if (file.exists()) {            if (file.open(QFile::ReadOnly)) {                 if (file.size() < _byteRange.fromInclusive || file.size() < _byteRange.toExclusive) {                    _result = ResourceRequest::InvalidByteRange;                } else {                    // fix it up based on the known size of the file                    _byteRange.fixupRange(file.size());                     if (_byteRange.fromInclusive >= 0) {                        // this is a positive byte range, simply skip to that part of the file and read from there                        file.seek(_byteRange.fromInclusive);                        _data = file.read(_byteRange.size());                    } else {                        // this is a negative byte range, we'll need to grab data from the end of the file first                        file.seek(file.size() + _byteRange.fromInclusive);                        _data = file.read(_byteRange.size());                    }                     _result = ResourceRequest::Success;                }             } else {                _result = ResourceRequest::AccessDenied;            }        } else {            _result = ResourceRequest::NotFound;        }    }        _state = Finished;    emit finished();}