Merge pull request #6654 from Chocobo1/persistence

Webui server fixes

.travis.yml

@@ -33,16 +33,15 @@ notifications:
     on_success: change
     on_failure: change
 
-# container-based builds
-#sudo: false
 cache:
   ccache: true
   directories:
     - $HOME/hombebrew_cache
 
 # opt-in Ubuntu Trusty
-sudo: required
 dist: trusty
+# container-based builds
+sudo: false
 
 addons:
   coverity_scan:
@@ -74,6 +73,7 @@ addons:
       # Qt 5.5.1
       - qt55base
       - qt55tools
+
 before_install:
   # only allow specific build for coverity scan, others will stop
   - if [ "$TRAVIS_BRANCH" = "$coverity_branch" ] && ! [ "$TRAVIS_OS_NAME" = "linux" -a "$lt_branch" = "RC_1_0" -a "$gui" = true -a "$build_system" = "qmake" ]; then exit ; fi
@@ -102,54 +102,51 @@ before_install:
   - echo $build_system
   - echo $ltconf
   - echo $qbtconf
+
 install:
-  - |
-    if [ "$TRAVIS_OS_NAME" = "linux" ]; then
+  #- |
+    #if [ "$TRAVIS_OS_NAME" = "linux" ]; then
       # build libtorrent from source
       #if [ "$lt_branch" != "dist" ]; then
-        #cd "$HOME" && pwd && git clone --depth 1 https://github.com/arvidn/libtorrent.git --branch $lt_branch ;
-        #cd libtorrent && ./autotool.sh && ./configure $ltconf && make install ;
-      #fi ;
-
-      # ccache
-      if [ "$TRAVIS_BRANCH" != "$coverity_branch" ]; then
-        dpkg-query -L ccache && export use_ccache=true ;
-        ccache -V && ccache --show-stats && ccache --zero-stats ;
-      fi ;
-    fi
+        #cd "$HOME" && pwd && git clone --depth 1 https://github.com/arvidn/libtorrent.git --branch $lt_branch
+        #cd libtorrent && ./autotool.sh && ./configure $ltconf && make install
+      #fi
+    #fi
   - |
     if [ "$TRAVIS_OS_NAME" = "osx" ]; then
-      wget https://builds.shiki.hu/homebrew/version ;
+      # dependencies
+      brew update > /dev/null
+      brew install colormake ccache zlib
+      PATH="/usr/local/opt/ccache/libexec:$PATH"
+      brew link --force zlib
+      brew outdated "pkg-config" || brew upgrade "pkg-config"
+
+      wget https://builds.shiki.hu/homebrew/version
       if ! cmp --quiet "version" "$HOME/hombebrew_cache/version" ; then
-        echo "Cached files are different from server. Downloading new ones." ;
+        echo "Cached files are different from server. Downloading new ones."
         # First delete old files
-        rm -r "$HOME/hombebrew_cache" ;
-        mkdir "$HOME/hombebrew_cache";
-        cp "version" $HOME/hombebrew_cache ;
-        cd "$HOME/hombebrew_cache" ;
-        wget https://builds.shiki.hu/homebrew/libtorrent-rasterbar.rb ;
-        wget https://builds.shiki.hu/homebrew/libtorrent-rasterbar-1.0.10.el_capitan.bottle.tar.gz ;
-        wget https://builds.shiki.hu/homebrew/qt5.rb ;
-        wget https://builds.shiki.hu/homebrew/qt5-5.7.1_1.el_capitan.bottle.tar.gz ;
+        rm -r "$HOME/hombebrew_cache"
+        mkdir "$HOME/hombebrew_cache"
+        cp "version" $HOME/hombebrew_cache
+        cd "$HOME/hombebrew_cache"
+        wget https://builds.shiki.hu/homebrew/libtorrent-rasterbar.rb
+        wget https://builds.shiki.hu/homebrew/libtorrent-rasterbar-1.0.10.el_capitan.bottle.tar.gz
+        wget https://builds.shiki.hu/homebrew/qt5.rb
+        wget https://builds.shiki.hu/homebrew/qt5-5.7.1_1.el_capitan.bottle.tar.gz
       fi
 
-      # dependencies
-      brew update > /dev/null ;
-      brew install colormake ccache ;
-      if [ "$build_system" = "cmake" ]; then
-        brew unlink cmake
-        brew install cmake;
-      fi
-      brew outdated "pkg-config" || brew upgrade "pkg-config" ;
       # Copy custom libtorrent bottle to homebrew's cache so it can find and install it
       # Also install our custom libtorrent formula by passing the local path to it
       # These 2 files are restored from Travis' cache.
-      cp "$HOME/hombebrew_cache/libtorrent-rasterbar-1.0.10.el_capitan.bottle.tar.gz" "$(brew --cache)" ;
-      brew install "$HOME/hombebrew_cache/libtorrent-rasterbar.rb" ;
+      cp "$HOME/hombebrew_cache/libtorrent-rasterbar-1.0.10.el_capitan.bottle.tar.gz" "$(brew --cache)"
+      brew install "$HOME/hombebrew_cache/libtorrent-rasterbar.rb"
 
       if [ "$build_system" = "cmake" ]; then
-        brew install qt5 ;
-        brew link --force qt5 ;
+        brew unlink cmake
+        brew install cmake
+
+        brew install qt5
+        brew link --force qt5
         ln -s /usr/local/opt/qt/mkspecs /usr/local/mkspecs
         ln -s /usr/local/opt/qt/plugins /usr/local/plugins
       else
@@ -157,18 +154,17 @@ install:
         # Copy custom qt5 bottle to homebrew's cache so it can find and install it
         # Also install our custom qt5 formula by passing the local path to it
         # These 2 files are restored from Travis' cache.
-        cp "$HOME/hombebrew_cache/qt5-5.7.1_1.el_capitan.bottle.tar.gz" "$(brew --cache)" ;
-        brew install "$HOME/hombebrew_cache/qt5.rb" ;
-        brew link --force qt5 ;
+        cp "$HOME/hombebrew_cache/qt5-5.7.1_1.el_capitan.bottle.tar.gz" "$(brew --cache)"
+        brew install "$HOME/hombebrew_cache/qt5.rb"
+        brew link --force qt5
       fi
 
       MY_CMAKE_OPENSSL_HINT="-DOPENSSL_ROOT_DIR=/usr/local/opt/openssl/"
-
-      # ccache
+    fi
+  - |
     if [ "$TRAVIS_BRANCH" != "$coverity_branch" ]; then
-        export PATH="/usr/local/opt/ccache/libexec:$PATH" && export use_ccache=true ;
-        ccache -V && ccache --show-stats && ccache --zero-stats ;
-      fi ;
+      export use_ccache=true
+      ccache -V && ccache --show-stats && ccache --zero-stats
     fi
 
 script:
@@ -184,9 +180,9 @@ script:
     if [ "$build_system" = "qmake" ]; then
       ./bootstrap.sh && ./configure $qbtconf
       if [ "$TRAVIS_OS_NAME" = "osx" ]; then
-        sed -i "" -e "s/^\(CC.*&&\).*$/\1 $CC/" src/Makefile ;  # workaround for Qt & ccache: https://bugreports.qt.io/browse/QTBUG-31034
-        sed -i "" -e "s/^\(CXX.*&&\).*$/\1 $CXX/" src/Makefile ;
-        sed -i "" -e 's/^\(CXXFLAGS.*\)$/\1 -Wno-unused-local-typedefs -Wno-inconsistent-missing-override/' src/Makefile ;
+        sed -i "" -e "s/^\(CC.*&&\).*$/\1 $CC/" src/Makefile  # workaround for Qt & ccache: https://bugreports.qt.io/browse/QTBUG-31034
+        sed -i "" -e "s/^\(CXX.*&&\).*$/\1 $CXX/" src/Makefile
+        sed -i "" -e 's/^\(CXXFLAGS.*\)$/\1 -Wno-unused-local-typedefs -Wno-inconsistent-missing-override/' src/Makefile
       fi
     fi
   - make && make install
@@ -196,8 +192,8 @@ after_success:
   - if [ "$TRAVIS_OS_NAME" = "linux" ]; then cd "$qbt_path/bin" ; fi
   - |
     if [ "$TRAVIS_OS_NAME" = "osx" ]; then
-      macdeployqt "$TRAVIS_BUILD_DIR/src/$qbt_exe.app" ;
-      cd "$TRAVIS_BUILD_DIR/src/$qbt_exe.app/Contents/MacOS" ;
+      macdeployqt "$TRAVIS_BUILD_DIR/src/$qbt_exe.app"
+      cd "$TRAVIS_BUILD_DIR/src/$qbt_exe.app/Contents/MacOS"
     fi
   - ./$qbt_exe --version
 

configure

@@ -5188,12 +5188,12 @@ if test -n "$zlib_CFLAGS"; then
     pkg_cv_zlib_CFLAGS="$zlib_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "zlib") 2>&5
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib >= 1.2.5.2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "zlib >= 1.2.5.2") 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_zlib_CFLAGS=`$PKG_CONFIG --cflags "zlib" 2>/dev/null`
+  pkg_cv_zlib_CFLAGS=`$PKG_CONFIG --cflags "zlib >= 1.2.5.2" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -5205,12 +5205,12 @@ if test -n "$zlib_LIBS"; then
     pkg_cv_zlib_LIBS="$zlib_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "zlib") 2>&5
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib >= 1.2.5.2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "zlib >= 1.2.5.2") 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_zlib_LIBS=`$PKG_CONFIG --libs "zlib" 2>/dev/null`
+  pkg_cv_zlib_LIBS=`$PKG_CONFIG --libs "zlib >= 1.2.5.2" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -5231,14 +5231,14 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-	        zlib_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "zlib" 2>&1`
+	        zlib_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "zlib >= 1.2.5.2" 2>&1`
         else
-	        zlib_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "zlib" 2>&1`
+	        zlib_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "zlib >= 1.2.5.2" 2>&1`
         fi
 	# Put the nasty error message in config.log where it belongs
 	echo "$zlib_PKG_ERRORS" >&5
 
-	as_fn_error $? "Package requirements (zlib) were not met:
+	as_fn_error $? "Package requirements (zlib >= 1.2.5.2) were not met:
 
 $zlib_PKG_ERRORS
 

configure.ac

@@ -166,7 +166,7 @@ PKG_CHECK_MODULES(libtorrent,
                   LIBS="$libtorrent_LIBS $LIBS"])
 
 PKG_CHECK_MODULES(zlib,
-                 [zlib],
+                 [zlib >= 1.2.5.2],
                  [CPPFLAGS="$zlib_CFLAGS $CPPFLAGS"
                  LIBS="$zlib_LIBS $LIBS"])
 

src/base/CMakeLists.txt

@@ -1,4 +1,4 @@
-find_package(ZLIB REQUIRED)
+find_package(ZLIB 1.2.5.2 REQUIRED)
 
 set(QBT_BASE_HEADERS
 bittorrent/addtorrentparams.h

src/base/http/connection.cpp

@@ -29,14 +29,14 @@
  * Contact : chris@qbittorrent.org
  */
 
-#include <QTcpSocket>
-#include <QDebug>
+#include "connection.h"
+
 #include <QRegExp>
-#include "types.h"
+#include <QTcpSocket>
+
+#include "irequesthandler.h"
 #include "requestparser.h"
 #include "responsegenerator.h"
-#include "irequesthandler.h"
-#include "connection.h"
 
 using namespace Http;
 
@@ -46,27 +46,33 @@ Connection::Connection(QTcpSocket *socket, IRequestHandler *requestHandler, QObj
     , m_requestHandler(requestHandler)
 {
     m_socket->setParent(this);
+    m_idleTimer.start();
     connect(m_socket, SIGNAL(readyRead()), SLOT(read()));
-    connect(m_socket, SIGNAL(disconnected()), SLOT(deleteLater()));
 }
 
 Connection::~Connection()
 {
+    m_socket->close();
 }
 
 void Connection::read()
 {
-    m_receivedData.append(m_socket->readAll());
+    m_idleTimer.restart();
 
+    m_receivedData.append(m_socket->readAll());
     Request request;
-    RequestParser::ErrorCode err = RequestParser::parse(m_receivedData, request);
+    RequestParser::ErrorCode err = RequestParser::parse(m_receivedData, request);  // TODO: transform request headers to lowercase
+
     switch (err) {
     case RequestParser::IncompleteRequest:
         // Partial request waiting for the rest
         break;
+
     case RequestParser::BadRequest:
         sendResponse(Response(400, "Bad Request"));
+        m_receivedData.clear();
         break;
+
     case RequestParser::NoError:
         Environment env;
         env.clientAddress = m_socket->peerAddress();
@@ -74,25 +80,65 @@ void Connection::read()
         if (acceptsGzipEncoding(request.headers["accept-encoding"]))
             response.headers[HEADER_CONTENT_ENCODING] = "gzip";
         sendResponse(response);
+        m_receivedData.clear();
         break;
     }
 }
 
 void Connection::sendResponse(const Response &response)
 {
-    m_socket->write(ResponseGenerator::generate(response));
-    m_socket->disconnectFromHost();
+    m_socket->write(toByteArray(response));
+    m_socket->close();  // TODO: remove when HTTP pipelining is supported
+}
+
+bool Connection::hasExpired(const qint64 timeout) const
+{
+    return m_idleTimer.hasExpired(timeout);
+}
+
+bool Connection::isClosed() const
+{
+    return (m_socket->state() == QAbstractSocket::UnconnectedState);
 }
 
-bool Connection::acceptsGzipEncoding(const QString &encoding)
+bool Connection::acceptsGzipEncoding(QString codings)
 {
-    QRegExp rx("(gzip)(;q=([^,]+))?");
-    if (rx.indexIn(encoding) >= 0) {
-        if (rx.cap(2).size() > 0)
-            // check if quality factor > 0
-            return (rx.cap(3).toDouble() > 0);
-        // if quality factor is not specified, then it's 1
+    // [rfc7231] 5.3.4. Accept-Encoding
+
+    const auto isCodingAvailable = [](const QStringList &list, const QString &encoding) -> bool
+    {
+        foreach (const QString &str, list) {
+            if (!str.startsWith(encoding))
+                continue;
+
+            // without quality values
+            if (str == encoding)
+                return true;
+
+            // [rfc7231] 5.3.1. Quality Values
+            const QStringRef substr = str.midRef(encoding.size() + 3);  // ex. skip over "gzip;q="
+
+            bool ok = false;
+            const double qvalue = substr.toDouble(&ok);
+            if (!ok || (qvalue <= 0.0))
+                return false;
+
             return true;
         }
         return false;
+    };
+
+    const QStringList list = codings.remove(' ').remove('\t').split(',', QString::SkipEmptyParts);
+    if (list.isEmpty())
+        return false;
+
+    const bool canGzip = isCodingAvailable(list, QLatin1String("gzip"));
+    if (canGzip)
+        return true;
+
+    const bool canAny = isCodingAvailable(list, QLatin1String("*"));
+    if (canAny)
+        return true;
+
+    return false;
 }

src/base/http/connection.h

@@ -33,12 +33,12 @@
 #ifndef HTTP_CONNECTION_H
 #define HTTP_CONNECTION_H
 
+#include <QElapsedTimer>
 #include <QObject>
+
 #include "types.h"
 
-QT_BEGIN_NAMESPACE
 class QTcpSocket;
-QT_END_NAMESPACE
 
 namespace Http
 {
@@ -53,16 +53,20 @@ namespace Http
         Connection(QTcpSocket *socket, IRequestHandler *requestHandler, QObject *parent = 0);
         ~Connection();
 
+        bool hasExpired(qint64 timeout) const;
+        bool isClosed() const;
+
     private slots:
         void read();
 
     private:
-        static bool acceptsGzipEncoding(const QString &encoding);
+        static bool acceptsGzipEncoding(QString codings);
         void sendResponse(const Response &response);
 
         QTcpSocket *m_socket;
         IRequestHandler *m_requestHandler;
         QByteArray m_receivedData;
+        QElapsedTimer m_idleTimer;
     };
 }
 

src/base/http/responsegenerator.cpp

@@ -29,39 +29,79 @@
  * Contact : chris@qbittorrent.org
  */
 
-#include "base/utils/gzip.h"
 #include "responsegenerator.h"
 
-using namespace Http;
+#include <QDateTime>
+
+#include "base/utils/gzip.h"
 
-QByteArray ResponseGenerator::generate(Response response)
+QByteArray Http::toByteArray(Response response)
 {
-    if (response.headers[HEADER_CONTENT_ENCODING] == "gzip") {
-        // A gzip seems to have 23 bytes overhead.
-        // Also "Content-Encoding: gzip\r\n" is 26 bytes long
-        // So we only benefit from gzip if the message is bigger than 23+26 = 49
-        // If the message is smaller than 49 bytes we actually send MORE data if we gzip
-        QByteArray dest_buf;
-        if ((response.content.size() > 49) && (Utils::Gzip::compress(response.content, dest_buf)))
-            response.content = dest_buf;
-        else
-            response.headers.remove(HEADER_CONTENT_ENCODING);
-    }
+    compressContent(response);
 
-    if (response.content.length() > 0)
     response.headers[HEADER_CONTENT_LENGTH] = QString::number(response.content.length());
+    response.headers[HEADER_DATE] = httpDate();
+
+    QByteArray buf;
+    buf.reserve(10 * 1024);
+
+    // Status Line
+    buf += QString("HTTP/%1 %2 %3")
+        .arg("1.1",  // TODO: depends on request
+            QString::number(response.status.code),
+            response.status.text)
+        .toLatin1()
+        .append(CRLF);
+
+    // Header Fields
+    for (auto i = response.headers.constBegin(); i != response.headers.constEnd(); ++i)
+        buf += QString("%1: %2").arg(i.key(), i.value()).toLatin1().append(CRLF);
+
+    // the first empty line
+    buf += CRLF;
+
+    // message body  // TODO: support HEAD request
+    buf += response.content;
+
+    return buf;
+}
+
+QString Http::httpDate()
+{
+    // [RFC 7231] 7.1.1.1. Date/Time Formats
+   // example: "Sun, 06 Nov 1994 08:49:37 GMT"
+
+    return QLocale::c().toString(QDateTime::currentDateTimeUtc(), QLatin1String("ddd, dd MMM yyyy HH:mm:ss"))
+        .append(QLatin1String(" GMT"));
+}
+
+void Http::compressContent(Response &response)
+{
+    if (response.headers.value(HEADER_CONTENT_ENCODING) != QLatin1String("gzip"))
+        return;
+
+    response.headers.remove(HEADER_CONTENT_ENCODING);
 
-    QString ret(QLatin1String("HTTP/1.1 %1 %2\r\n%3\r\n"));
+    // for very small files, compressing them only wastes cpu cycles
+    const int contentSize = response.content.size();
+    if (contentSize <= 1024)  // 1 kb
+        return;
 
-    QString header;
-    foreach (const QString& key, response.headers.keys())
-        header += QString("%1: %2\r\n").arg(key).arg(response.headers[key]);
+    // filter out known hard-to-compress types
+    const QString contentType = response.headers[HEADER_CONTENT_TYPE];
+    if ((contentType == CONTENT_TYPE_GIF) || (contentType == CONTENT_TYPE_PNG))
+        return;
 
-    ret = ret.arg(response.status.code).arg(response.status.text).arg(header);
+    // try compressing
+    bool ok = false;
+    const QByteArray compressedData = Utils::Gzip::compress(response.content, 6, &ok);
+    if (!ok)
+        return;
 
-    //  qDebug() << Q_FUNC_INFO;
-    //  qDebug() << "HTTP Response header:";
-    //  qDebug() << ret;
+    // "Content-Encoding: gzip\r\n" is 24 bytes long
+    if ((compressedData.size() + 24) >= contentSize)
+        return;
 
-    return ret.toUtf8() + response.content;
+    response.content = compressedData;
+    response.headers[HEADER_CONTENT_ENCODING] = QLatin1String("gzip");
 }

src/base/http/responsegenerator.h

@@ -37,11 +37,9 @@
 
 namespace Http
 {
-    class ResponseGenerator
-    {
-    public:
-        static QByteArray generate(Response response);
-    };
+    QByteArray toByteArray(Response response);
+    QString httpDate();
+    void compressContent(Response &response);
 }
 
 #endif // HTTP_RESPONSEGENERATOR_H

src/base/http/server.cpp

@@ -30,8 +30,10 @@
 
 #include "server.h"
 
+#include <QMutableListIterator>
 #include <QNetworkProxy>
 #include <QStringList>
+#include <QTimer>
 
 #ifndef QT_NO_OPENSSL
 #include <QSslSocket>
@@ -41,6 +43,10 @@
 
 #include "connection.h"
 
+static const int KEEP_ALIVE_DURATION = 7;  // seconds
+static const int CONNECTIONS_LIMIT = 500;
+static const int CONNECTIONS_SCAN_INTERVAL = 2;  // seconds
+
 using namespace Http;
 
 Server::Server(IRequestHandler *requestHandler, QObject *parent)
@@ -54,6 +60,10 @@ Server::Server(IRequestHandler *requestHandler, QObject *parent)
 #ifndef QT_NO_OPENSSL
     QSslSocket::setDefaultCiphers(safeCipherList());
 #endif
+
+    QTimer *dropConnectionTimer = new QTimer(this);
+    connect(dropConnectionTimer, &QTimer::timeout, this, &Server::dropTimedOutConnection);
+    dropConnectionTimer->start(CONNECTIONS_SCAN_INTERVAL * 1000);
 }
 
 Server::~Server()
@@ -62,6 +72,8 @@ Server::~Server()
 
 void Server::incomingConnection(qintptr socketDescriptor)
 {
+    if (m_connections.size() >= CONNECTIONS_LIMIT) return;
+
     QTcpSocket *serverSocket;
 #ifndef QT_NO_OPENSSL
     if (m_https)
@@ -70,7 +82,11 @@ void Server::incomingConnection(qintptr socketDescriptor)
 #endif
         serverSocket = new QTcpSocket(this);
 
-    if (serverSocket->setSocketDescriptor(socketDescriptor)) {
+    if (!serverSocket->setSocketDescriptor(socketDescriptor)) {
+        delete serverSocket;
+        return;
+    }
+
 #ifndef QT_NO_OPENSSL
     if (m_https) {
         static_cast<QSslSocket *>(serverSocket)->setProtocol(QSsl::SecureProtocols);
@@ -80,10 +96,20 @@ void Server::incomingConnection(qintptr socketDescriptor)
         static_cast<QSslSocket *>(serverSocket)->startServerEncryption();
     }
 #endif
-        new Connection(serverSocket, m_requestHandler, this);
+
+    Connection *c = new Connection(serverSocket, m_requestHandler, this);
+    m_connections.append(c);
+}
+
+void Server::dropTimedOutConnection()
+{
+    QMutableListIterator<Connection *> i(m_connections);
+    while (i.hasNext()) {
+        auto connection = i.next();
+        if (connection->isClosed() || connection->hasExpired(KEEP_ALIVE_DURATION)) {
+            delete connection;
+            i.remove();
         }
-    else {
-        serverSocket->deleteLater();
     }
 }
 

src/base/http/server.h

@@ -60,10 +60,14 @@ namespace Http
         void disableHttps();
 #endif
 
+    private slots:
+        void dropTimedOutConnection();
+
     private:
         void incomingConnection(qintptr socketDescriptor);
 
         IRequestHandler *m_requestHandler;
+        QList<Connection *> m_connections;  // for tracking persistence connections
 
 #ifndef QT_NO_OPENSSL
         QList<QSslCipher> safeCipherList() const;

src/base/http/types.h

@@ -29,32 +29,35 @@
 #ifndef HTTP_TYPES_H
 #define HTTP_TYPES_H
 
-#include <QString>
-#include <QMap>
 #include <QHostAddress>
+#include <QString>
 #include <QVector>
 
 #include "base/types.h"
 
 namespace Http
 {
-    const QString HEADER_SET_COOKIE = "Set-Cookie";
-    const QString HEADER_CONTENT_TYPE = "Content-Type";
-    const QString HEADER_CONTENT_ENCODING = "Content-Encoding";
-    const QString HEADER_CONTENT_LENGTH = "Content-Length";
-    const QString HEADER_CACHE_CONTROL = "Cache-Control";
-    const QString HEADER_X_FRAME_OPTIONS = "X-Frame-Options";
-    const QString HEADER_X_XSS_PROTECTION = "X-XSS-Protection";
-    const QString HEADER_X_CONTENT_TYPE_OPTIONS = "X-Content-Type-Options";
-    const QString HEADER_CONTENT_SECURITY_POLICY = "Content-Security-Policy";
+    const char HEADER_CACHE_CONTROL[] = "Cache-Control";
+    const char HEADER_CONTENT_ENCODING[] = "Content-Encoding";
+    const char HEADER_CONTENT_LENGTH[] = "Content-Length";
+    const char HEADER_CONTENT_SECURITY_POLICY[] = "Content-Security-Policy";
+    const char HEADER_CONTENT_TYPE[] = "Content-Type";
+    const char HEADER_DATE[] = "Date";
+    const char HEADER_SET_COOKIE[] = "Set-Cookie";
+    const char HEADER_X_CONTENT_TYPE_OPTIONS[] = "X-Content-Type-Options";
+    const char HEADER_X_FRAME_OPTIONS[] = "X-Frame-Options";
+    const char HEADER_X_XSS_PROTECTION[] = "X-XSS-Protection";
+
+    const char CONTENT_TYPE_CSS[] = "text/css; charset=UTF-8";
+    const char CONTENT_TYPE_GIF[] = "image/gif";
+    const char CONTENT_TYPE_HTML[] = "text/html; charset=UTF-8";
+    const char CONTENT_TYPE_JS[] = "application/javascript; charset=UTF-8";
+    const char CONTENT_TYPE_JSON[] = "application/json";
+    const char CONTENT_TYPE_PNG[] = "image/png";
+    const char CONTENT_TYPE_TXT[] = "text/plain; charset=UTF-8";
 
-    const QString CONTENT_TYPE_CSS = "text/css; charset=UTF-8";
-    const QString CONTENT_TYPE_GIF = "image/gif";
-    const QString CONTENT_TYPE_HTML = "text/html; charset=UTF-8";
-    const QString CONTENT_TYPE_JS = "application/javascript; charset=UTF-8";
-    const QString CONTENT_TYPE_JSON = "application/json";
-    const QString CONTENT_TYPE_PNG = "image/png";
-    const QString CONTENT_TYPE_TXT = "text/plain; charset=UTF-8";
+    // portability: "\r\n" doesn't guarantee mapping to the correct value
+    const char CRLF[] = {0x0D, 0x0A, '\0'};
 
     struct Environment
     {

src/base/net/downloadhandler.cpp

@@ -92,8 +92,8 @@ void DownloadHandler::processFinishedDownload()
             // Success
             QByteArray replyData = m_reply->readAll();
             if (m_reply->rawHeader("Content-Encoding") == "gzip") {
-                // uncompress gzip reply
-                Utils::Gzip::uncompress(replyData, replyData);
+                // decompress gzip reply
+                replyData = Utils::Gzip::decompress(replyData);
             }
 
             if (m_saveToFile) {

src/base/net/geoipmanager.cpp

@@ -416,8 +416,10 @@ void GeoIPManager::downloadFinished(const QString &url, QByteArray data)
 {
     Q_UNUSED(url);
 
-    if (!Utils::Gzip::uncompress(data, data)) {
-        Logger::instance()->addMessage(tr("Could not uncompress GeoIP database file."), Log::WARNING);
+    bool ok = false;
+    data = Utils::Gzip::decompress(data, &ok);
+    if (!ok) {
+        Logger::instance()->addMessage(tr("Could not decompress GeoIP database file."), Log::WARNING);
         return;
     }
 

src/base/utils/gzip.cpp

@@ -27,116 +27,123 @@
  * exception statement from your version.
  */
 
+#include "gzip.h"
+
 #include <QByteArray>
-#include <zlib.h>
 
-#include "gzip.h"
+#ifndef ZLIB_CONST
+#define ZLIB_CONST  // make z_stream.next_in const
+#endif
+#include <zlib.h>
 
-bool Utils::Gzip::compress(QByteArray src, QByteArray &dest)
+QByteArray Utils::Gzip::compress(const QByteArray &data, const int level, bool *ok)
 {
-    static const int BUFSIZE = 128 * 1024;
-    char tmpBuf[BUFSIZE];
-    int ret;
+    if (ok) *ok = false;
 
-    dest.clear();
+    if (data.isEmpty())
+        return {};
+
+    const int BUFSIZE = 128 * 1024;
+    char tmpBuf[BUFSIZE] = {0};
 
     z_stream strm;
     strm.zalloc = Z_NULL;
     strm.zfree = Z_NULL;
     strm.opaque = Z_NULL;
-    strm.next_in = reinterpret_cast<uchar *>(src.data());
-    strm.avail_in = src.length();
-    strm.next_out = reinterpret_cast<uchar *>(tmpBuf);
+    strm.next_in = reinterpret_cast<const Bytef *>(data.constData());
+    strm.avail_in = uInt(data.size());
+    strm.next_out = reinterpret_cast<Bytef *>(tmpBuf);
     strm.avail_out = BUFSIZE;
 
     // windowBits = 15 + 16 to enable gzip
     // From the zlib manual: windowBits can also be greater than 15 for optional gzip encoding. Add 16 to windowBits
     // to write a simple gzip header and trailer around the compressed data instead of a zlib wrapper.
-    ret = deflateInit2(&strm, Z_BEST_COMPRESSION, Z_DEFLATED, 15 + 16, 8, Z_DEFAULT_STRATEGY);
+    int result = deflateInit2(&strm, level, Z_DEFLATED, (15 + 16), 9, Z_DEFAULT_STRATEGY);
+    if (result != Z_OK)
+        return {};
 
-    if (ret != Z_OK)
-        return false;
+    QByteArray output;
+    output.reserve(deflateBound(&strm, data.size()));
 
-    while (strm.avail_in != 0) {
-        ret = deflate(&strm, Z_NO_FLUSH);
-        if (ret != Z_OK)
-            return false;
+    // feed to deflate
+    while (strm.avail_in > 0) {
+        result = deflate(&strm, Z_NO_FLUSH);
 
-        if (strm.avail_out == 0) {
-            dest.append(tmpBuf, BUFSIZE);
-            strm.next_out = reinterpret_cast<uchar *>(tmpBuf);
-            strm.avail_out = BUFSIZE;
-        }
+        if (result != Z_OK) {
+            deflateEnd(&strm);
+            return {};
         }
 
-    int deflateRes = Z_OK;
-    while (deflateRes == Z_OK) {
-        if (strm.avail_out == 0) {
-            dest.append(tmpBuf, BUFSIZE);
-            strm.next_out = reinterpret_cast<uchar *>(tmpBuf);
+        output.append(tmpBuf, (BUFSIZE - strm.avail_out));
+        strm.next_out = reinterpret_cast<Bytef *>(tmpBuf);
         strm.avail_out = BUFSIZE;
     }
 
-        deflateRes = deflate(&strm, Z_FINISH);
-    }
+    // flush the rest from deflate
+    while (result != Z_STREAM_END) {
+        result = deflate(&strm, Z_FINISH);
 
-    if (deflateRes != Z_STREAM_END)
-        return false;
+        output.append(tmpBuf, (BUFSIZE - strm.avail_out));
+        strm.next_out = reinterpret_cast<Bytef *>(tmpBuf);
+        strm.avail_out = BUFSIZE;
+    }
 
-    dest.append(tmpBuf, BUFSIZE - strm.avail_out);
     deflateEnd(&strm);
 
-    return true;
+    if (ok) *ok = true;
+    return output;
 }
 
-bool Utils::Gzip::uncompress(QByteArray src, QByteArray &dest)
+QByteArray Utils::Gzip::decompress(const QByteArray &data, bool *ok)
 {
-    dest.clear();
+    if (ok) *ok = false;
 
-    if (src.size() <= 4) {
-        qWarning("uncompress: Input data is truncated");
-        return false;
-    }
+    if (data.isEmpty())
+        return {};
 
-    z_stream strm;
-    static const int CHUNK_SIZE = 1024;
-    char out[CHUNK_SIZE];
+    const int BUFSIZE = 1024 * 1024;
+    char tmpBuf[BUFSIZE] = {0};
 
-    /* allocate inflate state */
+    z_stream strm;
     strm.zalloc = Z_NULL;
     strm.zfree = Z_NULL;
     strm.opaque = Z_NULL;
-    strm.avail_in = static_cast<uint>(src.size());
-    strm.next_in = reinterpret_cast<uchar *>(src.data());
+    strm.next_in = reinterpret_cast<const Bytef *>(data.constData());
+    strm.avail_in = uInt(data.size());
+    strm.next_out = reinterpret_cast<Bytef *>(tmpBuf);
+    strm.avail_out = BUFSIZE;
 
-    const int windowBits = 15;
-    const int ENABLE_ZLIB_GZIP = 32;
+    // windowBits must be greater than or equal to the windowBits value provided to deflateInit2() while compressing
+    // Add 32 to windowBits to enable zlib and gzip decoding with automatic header detection
+    int result = inflateInit2(&strm, (15 + 32));
+    if (result != Z_OK)
+        return {};
 
-    int ret = inflateInit2(&strm, windowBits | ENABLE_ZLIB_GZIP); // gzip decoding
-    if (ret != Z_OK)
-        return false;
+    QByteArray output;
+    // from lzbench, level 9 average compression ratio is: 31.92%, which decompression ratio is: 1 / 0.3192 = 3.13
+    output.reserve(data.size() * 3);
 
-    // run inflate()
-    do {
-        strm.avail_out = CHUNK_SIZE;
-        strm.next_out = reinterpret_cast<uchar *>(out);
+    // run inflate
+    while (true) {
+        result = inflate(&strm, Z_NO_FLUSH);
 
-        ret = inflate(&strm, Z_NO_FLUSH);
-        Q_ASSERT(ret != Z_STREAM_ERROR); // state not clobbered
+        if (result == Z_STREAM_END) {
+            output.append(tmpBuf, (BUFSIZE - strm.avail_out));
+            break;
+        }
 
-        switch (ret) {
-        case Z_NEED_DICT:
-        case Z_DATA_ERROR:
-        case Z_MEM_ERROR:
+        if (result != Z_OK) {
             inflateEnd(&strm);
-            return false;
+            return {};
         }
 
-        dest.append(out, CHUNK_SIZE - strm.avail_out);
+        output.append(tmpBuf, (BUFSIZE - strm.avail_out));
+        strm.next_out = reinterpret_cast<Bytef *>(tmpBuf);
+        strm.avail_out = BUFSIZE;
     }
-    while (!strm.avail_out);
 
-    // clean up and return
     inflateEnd(&strm);
-    return true;
+
+    if (ok) *ok = true;
+    return output;
 }

src/base/utils/gzip.h

@@ -36,8 +36,8 @@ namespace Utils
 {
     namespace Gzip
     {
-        bool compress(QByteArray src, QByteArray &dest);
-        bool uncompress(QByteArray src, QByteArray &dest);
+        QByteArray compress(const QByteArray &data, int level = 6, bool *ok = nullptr);
+        QByteArray decompress(const QByteArray &data, bool *ok = nullptr);
     }
 }