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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| /* | ||
| * Strawberry Music Player | ||
| * Copyright 2012, David Sansome <[email protected]> | ||
| * Copyright 2025, Jonas Kvinge <[email protected]> | ||
| * | ||
| * Strawberry is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * Strawberry is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with Strawberry. If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
|
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| #include <algorithm> | ||
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| #include <QByteArray> | ||
| #include <QString> | ||
| #include <QUrl> | ||
| #include <QEventLoop> | ||
| #include <QNetworkReply> | ||
| #include <QNetworkRequest> | ||
| #include <QSslError> | ||
|
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| #include "core/logging.h" | ||
| #include "core/networkaccessmanager.h" | ||
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| #include "streamtagreader.h" | ||
|
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| namespace { | ||
| constexpr TagLibLengthType kTagLibPrefixCacheBytes = 64UL * 1024UL; | ||
| constexpr TagLibLengthType kTagLibSuffixCacheBytes = 8UL * 1024UL; | ||
| } // namespace | ||
|
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| StreamTagReader::StreamTagReader(const QUrl &url, const QString &filename, const quint64 length, const QString &authorization_header) | ||
| : url_(url), | ||
| filename_(filename), | ||
| encoded_filename_(filename_.toUtf8()), | ||
| length_(static_cast<TagLibLengthType>(length)), | ||
| authorization_header_(authorization_header), | ||
| network_(new NetworkAccessManager), | ||
| cursor_(0), | ||
| cache_(length), | ||
| num_requests_(0) { | ||
|
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| network_->setAutoDeleteReplies(true); | ||
|
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| } | ||
|
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| TagLib::FileName StreamTagReader::name() const { return encoded_filename_.data(); } | ||
|
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| TagLib::ByteVector StreamTagReader::readBlock(const TagLibLengthType length) { | ||
|
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| const uint start = static_cast<uint>(cursor_); | ||
| const uint end = static_cast<uint>(std::min(cursor_ + length - 1, length_ - 1)); | ||
|
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| if (end < start) { | ||
| return TagLib::ByteVector(); | ||
| } | ||
|
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| if (CheckCache(start, end)) { | ||
| const TagLib::ByteVector cached = GetCached(start, end); | ||
| cursor_ += static_cast<TagLibLengthType>(cached.size()); | ||
| return cached; | ||
| } | ||
|
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| QNetworkRequest request(url_); | ||
| if (!authorization_header_.isEmpty()) { | ||
| request.setRawHeader("Authorization", authorization_header_.toUtf8()); | ||
| } | ||
| request.setRawHeader("Range", QStringLiteral("bytes=%1-%2").arg(start).arg(end).toUtf8()); | ||
| request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::AlwaysNetwork); | ||
| request.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy); | ||
|
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| QNetworkReply *reply = network_->get(request); | ||
| ++num_requests_; | ||
|
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| QEventLoop event_loop; | ||
| QObject::connect(reply, &QNetworkReply::finished, &event_loop, &QEventLoop::quit); | ||
| event_loop.exec(); | ||
|
|
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| if (reply->error() != QNetworkReply::NoError) { | ||
| qLog(Error) << "Unable to get tags from stream for" << url_ << "got error:" << reply->errorString(); | ||
| return TagLib::ByteVector(); | ||
| } | ||
|
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| if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).isValid()) { | ||
| const int http_status_code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt(); | ||
| if (http_status_code >= 400) { | ||
| qLog(Error) << "Unable to get tags from stream for" << url_ << "received HTTP code" << http_status_code; | ||
| return TagLib::ByteVector(); | ||
| } | ||
| } | ||
|
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| const QByteArray data = reply->readAll(); | ||
| const TagLib::ByteVector bytes(data.data(), static_cast<uint>(data.size())); | ||
| cursor_ += static_cast<TagLibLengthType>(data.size()); | ||
|
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| FillCache(start, bytes); | ||
|
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| return bytes; | ||
|
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| } | ||
|
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| void StreamTagReader::writeBlock(const TagLib::ByteVector &data) { | ||
| Q_UNUSED(data); | ||
| } | ||
|
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| void StreamTagReader::insert(const TagLib::ByteVector &data, const TagLibUOffsetType start, const TagLibLengthType replace) { | ||
| Q_UNUSED(data) | ||
| Q_UNUSED(start) | ||
| Q_UNUSED(replace) | ||
| } | ||
|
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| void StreamTagReader::removeBlock(const TagLibUOffsetType start, const TagLibLengthType length) { | ||
| Q_UNUSED(start) | ||
| Q_UNUSED(length) | ||
| } | ||
|
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| bool StreamTagReader::readOnly() const { return true; } | ||
|
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| bool StreamTagReader::isOpen() const { return true; } | ||
|
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| void StreamTagReader::seek(const TagLibOffsetType offset, const TagLib::IOStream::Position position) { | ||
|
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| switch (position) { | ||
| case TagLib::IOStream::Beginning: | ||
| cursor_ = offset; | ||
| break; | ||
|
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| case TagLib::IOStream::Current: | ||
| cursor_ = std::min(cursor_ + static_cast<TagLibLengthType>(offset), length_); | ||
| break; | ||
|
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| case TagLib::IOStream::End: | ||
| // This should really not have qAbs(), but OGG reading needs it. | ||
| cursor_ = std::max(static_cast<TagLibLengthType>(0), length_ - qAbs(static_cast<TagLibLengthType>(offset))); | ||
| break; | ||
| } | ||
|
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| } | ||
|
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| void StreamTagReader::clear() { cursor_ = 0; } | ||
|
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| TagLibOffsetType StreamTagReader::tell() const { return static_cast<TagLibOffsetType>(cursor_); } | ||
|
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| TagLibOffsetType StreamTagReader::length() { return static_cast<TagLibOffsetType>(length_); } | ||
|
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| void StreamTagReader::truncate(const TagLibOffsetType length) { | ||
| Q_UNUSED(length) | ||
| } | ||
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| bool StreamTagReader::CheckCache(const uint start, const uint end) { | ||
|
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| for (uint i = start; i <= end; ++i) { | ||
| if (!cache_.test(i)) { | ||
| return false; | ||
| } | ||
| } | ||
|
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| return true; | ||
|
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| } | ||
|
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| void StreamTagReader::FillCache(const uint start, const TagLib::ByteVector &data) { | ||
|
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| for (uint i = 0; i < data.size(); ++i) { | ||
| cache_.set(start + i, data[static_cast<int>(i)]); | ||
| } | ||
|
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| } | ||
|
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| TagLib::ByteVector StreamTagReader::GetCached(const uint start, const uint end) { | ||
|
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| const uint size = end - start + 1U; | ||
| TagLib::ByteVector data(size); | ||
| for (uint i = 0; i < size; ++i) { | ||
| data[static_cast<int>(i)] = cache_.get(start + i); | ||
| } | ||
|
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| return data; | ||
|
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| } | ||
|
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| void StreamTagReader::PreCache() { | ||
|
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| // For reading the tags of an MP3, TagLib tends to request: | ||
| // 1. The first 1024 bytes | ||
| // 2. Somewhere between the first 2KB and first 60KB | ||
| // 3. The last KB or two. | ||
| // 4. Somewhere in the first 64KB again | ||
| // | ||
| // OGG Vorbis may read the last 4KB. | ||
| // | ||
| // So, if we precache the first 64KB and the last 8KB we should be sorted :-) | ||
| // Ideally, we would use bytes=0-655364,-8096 but Google Drive does not seem | ||
| // to support multipart byte ranges yet so we have to make do with two requests. | ||
|
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| seek(0, TagLib::IOStream::Beginning); | ||
| readBlock(kTagLibPrefixCacheBytes); | ||
| seek(kTagLibSuffixCacheBytes, TagLib::IOStream::End); | ||
| readBlock(kTagLibSuffixCacheBytes); | ||
| clear(); | ||
|
|
||
| } |
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