////  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 <QtCore/QFile>#include <QtCore/QFileSelector>#include <QtCore/QDateTime>#include <QtCore/QDebug> #include <StatTracker.h>#include <shared/FileUtils.h>#include <PathUtils.h> #include "NetworkLogging.h"#include "ResourceManager.h"#include "NetworkingConstants.h"#include "MetaverseAPI.h" void FileResourceRequest::doSend() {    auto statTracker = DependencyManager::get<StatTracker>();    statTracker->incrementStat(STAT_FILE_REQUEST_STARTED);    int fileSize = 0;    QString filename;    if (_url.scheme() == URL_SCHEME_QRC) {        filename = ":/" + _url.path();    } else {        filename = PathUtils::expandToLocalDataAbsolutePath(_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();        }    }      // Allow platform specific versions of files loaded out of a resource cache via file://    {        QString originalFilename = filename;        QFileSelector fileSelector;        fileSelector.setExtraSelectors(FileUtils::getFileSelectors());        filename = fileSelector.select(filename);    }     if (!_byteRange.isValid()) {        _result = ResourceRequest::InvalidByteRange;    } else {        QFile file(filename);        if (file.exists()) {            setProperty("last-modified", toHttpDateString(QFileInfo(file).lastModified().toMSecsSinceEpoch()));            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;                    fileSize = file.size();                }             } else {                _result = ResourceRequest::AccessDenied;            }        } else {            _result = ResourceRequest::NotFound;        }    }        _state = Finished;    emit finished();     if (_result == ResourceRequest::Success) {        statTracker->incrementStat(STAT_FILE_REQUEST_SUCCESS);        statTracker->updateStat(STAT_FILE_RESOURCE_TOTAL_BYTES, fileSize);    } else {        statTracker->incrementStat(STAT_FILE_REQUEST_FAILED);    }}