Ready for release.

README.md

@@ -0,0 +1,53 @@
+# bp_audio
+**bp** stands for **bilibili ported**, but also **bai piao**.
+
+![banner](https://superfashi.b0.upaiyun.com/wp-content/uploads/2018/02/banner-bp-audio.png)
+
+An out-of-the-box extractor for Bilibili's official FLAC music.
+
+It can download Bilibili-purchased music in *SQ* (aka lossless) version without an account whatsoever. While downloading, it can also acquire music's metadata, including album art. It can also download the whole *menu* (aka album) at one time.
+
+# Example
+![Example-GIF](https://superfashi.b0.upaiyun.com/wp-content/uploads/2018/02/bp_example.gif)
+
+With metadata included:
+
+![Example-Meta](https://superfashi.b0.upaiyun.com/wp-content/uploads/2018/02/bp_example.png)
+
+Try running this command on your own computer.
+
+# Distribution
+You can download the pre-compiled *x86_64 (amd64)* version [here](https://github.com/hanbang-wang/bp_audio/releases), which should be running without any problem on latest Windows devices. Requests for other versions will likely be ignored due to the reason in [License & Disclaimer](#license--disclaimer) section, so you will have to compile it by yourself: see [Compilation](#compilation) section below.
+
+# Compilation
+First you'll need *[Qt framework](https://www.qt.io)*; *Qt Creator* is highly suggested.
+
+Next you'll need:
+
+- [gumbo-query](https://github.com/lazytiger/gumbo-query) for HTML DOM parsing.
+
+  >   Actually I can use regex, but that just makes me an idiot.
+
+- [TagLib](https://github.com/taglib/taglib) for audio file metadata.
+
+Then just `qmake bp_audio.pro` and `make`, as what you would do for every Qt project.
+
+# Usage
+```bash
+Usage: bp_audio
+Get to know some free official FLAC music.
+
+Options:
+  -a, --au <au>     Audio AU number.
+  --menu            Download whole menu.
+  -o, --out <path>  Output folder path.
+  -?, -h, --help    Displays this help.
+  -v, --version     Displays version information.
+```
+
+# License & Disclaimer
+This little repo is unlicensed, meaning it's released into public domain and you can do anything you want. For more information, please refer to [http://unlicense.org](http://unlicense.org).
+
+This is only a proof-of-concept of how bad Bilibili's inner software and web developers are—the mixed use of params in `path` and `query`, the **useless** key validation of CDN, etc. Therefore, it shall only be used for research and educational purpose.
+
+Neither this project, nor its creator(s), is responsible for any misuses, illegal behaviors, and so forth.

main.cpp

@@ -49,13 +49,17 @@ class PictureWrapper {
     }
 };
 
+const int bar_width = 50;
+const QString app_name = "bp_audio";
+const QString app_version = "1.0";
+
 QCommandLineOption au_opt({"a", "au"}, "Audio AU number.", "au");
 QCommandLineOption all_opt("menu", "Download whole menu.");
 QCommandLineOption output_opt({"o", "out"}, "Output folder path.", "path");
 QCommandLineParser parser;
 QScopedPointer<QNetworkAccessManager> session;
 QDir output;
-QHash<QString, QSharedPointer<PictureWrapper>> assets;
+QHash<QString, QSharedPointer<PictureWrapper> > assets;
 
 QString find_audio(const QByteArray &data) {
     CDocument doc;
@@ -64,6 +68,19 @@ QString find_audio(const QByteArray &data) {
     return QString::fromStdString(audio.nodeAt(0).attribute("src"));
 }
 
+void download_progress(const qint64 &bytes_received, const qint64 &bytes_total) {
+    if (bytes_total == -1) return;
+    std::cerr << '[';
+    int pos = bar_width * bytes_received / bytes_total;
+    for (int i = 0; i < bar_width; ++i) {
+        if (i < pos) std::cerr << '=';
+        else if (i == pos) std::cerr << '>';
+        else std::cerr << ' ';
+    }
+    std::cerr << "] " << int(100 * bytes_received / bytes_total) << " %\r";
+    if (bytes_received >= bytes_total) std::cerr << '\n';
+}
+
 void write_metadata(const QString &file, const QJsonObject &data,
                     const int &track, const int &total) {
     TagLib::FLAC::File f(TagLib::FileName(file.toStdWString().data()));
@@ -124,7 +141,7 @@ void download_song(const QJsonObject &data, const int &track = -1, const int &to
     QString file_name = QStringLiteral("%1 - %2.flac").arg(data["author"].toString(), data["title"].toString());
     std::array<wchar_t, MAX_PATH> buf{};
     file_name.toWCharArray(buf.data());
-    PathCleanupSpec(NULL, buf.data());
+    PathCleanupSpec(output.absolutePath().toStdWString().data(), buf.data());
     file_name = QString::fromWCharArray(buf.data());
 
     const QString &au = QString::number(data["id"].toInt());
@@ -154,24 +171,27 @@ void download_song(const QJsonObject &data, const int &track = -1, const int &to
 
     QNetworkRequest song_flac(audio_url);
     QScopedPointer<QNetworkReply> song_res(session->get(song_flac));
+    QObject::connect(song_res.data(), &QNetworkReply::downloadProgress, download_progress);
+    QObject::connect(song_res.data(), &QNetworkReply::readyRead, &loop, &QEventLoop::quit);
     QObject::connect(song_res.data(), &QNetworkReply::finished, &loop, &QEventLoop::quit);
-    loop.exec();
 
-    if (song_res->error() != QNetworkReply::NoError) {
-        qCritical("Error loading audio resource");
-        qDebug("  %s", qUtf8Printable(song_res->errorString()));
-        std::exit(EXIT_FAILURE);
-    }
-
-    qInfo("Writing to %s...", qUtf8Printable(file_name));
     file_name = output.filePath(file_name);
+    qInfo("Writing to %s...", qUtf8Printable(file_name));
     QFile f(file_name);
     if (f.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
-        f.write(song_res->readAll());
+        do {
+            loop.exec();
+            if (song_res->error() != QNetworkReply::NoError) {
+                qCritical("Error loading audio resource");
+                qDebug("  %s", qUtf8Printable(song_res->errorString()));
+                std::exit(EXIT_FAILURE);
+            }
+            f.write(song_res->readAll());
+        } while (!song_res->isFinished());
         f.close();
     }
     write_metadata(file_name, data, track, total);
-    qInfo("Finished for %s...", qUtf8Printable(file_name));
+    qInfo("Finished for %s", qUtf8Printable(file_name));
 }
 
 void get_menu_info(const QString &menuid) {
@@ -204,7 +224,7 @@ void get_menu_info(const QString &menuid) {
     QString folder_name = QStringLiteral("%1 - %2").arg(menus_response["mbnames"].toString(), menus_response["title"].toString());
     std::array<wchar_t, MAX_PATH> buf{};
     folder_name.toWCharArray(buf.data());
-    PathCleanupSpec(NULL, buf.data());
+    PathCleanupSpec(output.absolutePath().toStdWString().data(), buf.data());
     folder_name = QString::fromWCharArray(buf.data());
     output.mkdir(folder_name);
     output.cd(folder_name);
@@ -260,14 +280,17 @@ void get_song_info(const QString &au)
 int main(int argc, char *argv[])
 {
     QCoreApplication a(argc, argv);
+    a.setApplicationName(app_name);
+    a.setApplicationVersion(app_version);
 
     session.reset(new QNetworkAccessManager());
 
     parser.addOption(au_opt);
     parser.addOption(all_opt);
     parser.addOption(output_opt);
     parser.addHelpOption();
-    parser.setApplicationDescription("Free bili lossless audio.");
+    parser.addVersionOption();
+    parser.setApplicationDescription("Get to know some free official FLAC music.");
     parser.process(a);
 
     const QString &au_number = parser.value(au_opt);