Add support for parallel downloads

New option "--threads" can be used to set how many parallel downloads to run. The default is 4 threads.

Changes to behavior:
- Serials and changelogs are saved and covers downloaded for all games that match the "--game" filter before any other files are downloaded.
- Automatic XML creation is run after all files are downloaded. Previously xml data was automatically created right after download finished.
- The "--limit-rate" option sets rate limit for thread not global rate limit.

CMakeLists.txt

@@ -3,7 +3,10 @@ project (lgogdownloader LANGUAGES CXX VERSION 2.28)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG=1")
+set(LINK_LIBCRYPTO 0)
 
+find_program(READELF readelf DOC "Location of the readelf program")
+find_program(GREP grep DOC "Location of the grep program")
 find_package(Boost
   REQUIRED
   system
@@ -13,11 +16,25 @@ find_package(Boost
   date_time
   )
 find_package(CURL 7.32.0 REQUIRED)
+if(CURL_FOUND)
+  execute_process(
+    COMMAND ${READELF} -d ${CURL_LIBRARIES}
+    COMMAND ${GREP} -q "libssl\\|libcrypto"
+    RESULT_VARIABLE READELF_RESULT_VAR
+  )
+  if(READELF_RESULT_VAR EQUAL 0)
+    add_definitions(-DSSL_THREAD_SETUP_OPENSSL=1)
+    find_package(Libcrypto REQUIRED)
+    set(LINK_LIBCRYPTO 1)
+  endif(READELF_RESULT_VAR EQUAL 0)
+endif(CURL_FOUND)
+
 find_package(OAuth REQUIRED)
 find_package(Jsoncpp REQUIRED)
 find_package(Htmlcxx REQUIRED)
 find_package(Tinyxml2 REQUIRED)
 find_package(Rhash REQUIRED)
+find_package(Threads REQUIRED)
 
 file(GLOB SRC_FILES
   main.cpp
@@ -95,8 +112,15 @@ target_link_libraries(${PROJECT_NAME}
   PRIVATE ${Htmlcxx_LIBRARIES}
   PRIVATE ${Tinyxml2_LIBRARIES}
   PRIVATE ${Rhash_LIBRARIES}
+  PRIVATE ${CMAKE_THREAD_LIBS_INIT}
   )
 
+if(LINK_LIBCRYPTO EQUAL 1)
+  target_link_libraries(${PROJECT_NAME}
+    PRIVATE ${Libcrypto_LIBRARIES}
+  )
+endif(LINK_LIBCRYPTO EQUAL 1)
+
 if(MSVC)
   # Force to always compile with W4
   if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")

cmake/FindLibcrypto.cmake

@@ -0,0 +1,27 @@
+# - Try to find libcrypto
+#
+# Once done this will define
+#  Libcrypto_FOUND - System has libcrypto
+#  Libcrypto_INCLUDE_DIRS - The libcrypto include directories
+#  Libcrypto_LIBRARIES - The libraries needed to use libcrypto
+
+find_package(PkgConfig)
+pkg_check_modules(PC_LIBCRYPTO REQUIRED libcrypto)
+
+find_path(LIBCRYPTO_INCLUDE_DIR openssl/crypto.h
+  HINTS ${PC_LIBCRYPTO_INCLUDEDIR}
+  ${PC_LIBCRYPTO_INCLUDE_DIRS}
+  )
+
+find_library(LIBCRYPTO_LIBRARY NAMES crypto
+  HINTS ${PC_LIBCRYPTO_LIBDIR}
+  ${PC_LIBCRYPTO_LIBRARY_DIRS}
+  )
+
+mark_as_advanced(LIBCRYPTO_INCLUDE_DIR LIBCRYPTO_LIBRARY)
+
+if(PC_LIBCRYPTO_FOUND)
+  set(Libcrypto_FOUND ON)
+  set(Libcrypto_INCLUDE_DIRS ${LIBCRYPTO_INCLUDE_DIR})
+  set(Libcrypto_LIBRARIES ${LIBCRYPTO_LIBRARY})
+endif(PC_LIBCRYPTO_FOUND)

include/config.h

@@ -82,6 +82,7 @@ class Config
         unsigned int iInstallerPlatform;
         unsigned int iInstallerLanguage;
         unsigned int iInclude;
+        unsigned int iThreads;
         int iRetries;
         int iWait;
         int iCacheValid;

include/downloader.h

@@ -25,6 +25,7 @@
 #include "api.h"
 #include "progressbar.h"
 #include "website.h"
+#include "threadsafequeue.h"
 #include <curl/curl.h>
 #include <json/json.h>
 #include <ctime>
@@ -48,6 +49,15 @@ class Timer
         struct timeval last_update;
 };
 
+struct xferInfo
+{
+    unsigned int tid;
+    CURL* curlhandle;
+    Timer timer;
+    std::deque< std::pair<time_t, uintmax_t> > TimeAndSize;
+    curl_off_t offset;
+};
+
 class Downloader
 {
     public:
@@ -89,6 +99,9 @@ class Downloader
         void saveSerials(const std::string& serials, const std::string& filepath);
         std::string getChangelogFromJSON(const Json::Value& json);
         void saveChangelog(const std::string& changelog, const std::string& filepath);
+        static void processDownloadQueue(Config conf, const unsigned int& tid);
+        static int progressCallbackForThread(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow);
+        void printProgress();
 
         static int progressCallback(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow);
         static size_t writeMemoryCallback(char *ptr, size_t size, size_t nmemb, void *userp);

include/downloadinfo.h

@@ -0,0 +1,94 @@
+/* This program is free software. It comes without any warranty, to
+ * the extent permitted by applicable law. You can redistribute it
+ * and/or modify it under the terms of the Do What The Fuck You Want
+ * To Public License, Version 2, as published by Sam Hocevar. See
+ * http://www.wtfpl.net/ for more details. */
+
+#ifndef DOWNLOADINFO_H
+#define DOWNLOADINFO_H
+
+#include <curl/curl.h>
+#include <mutex>
+
+const unsigned int DLSTATUS_NOTSTARTED = 0;
+const unsigned int DLSTATUS_STARTING   = 1 << 0;
+const unsigned int DLSTATUS_RUNNING    = 1 << 1;
+const unsigned int DLSTATUS_FINISHED   = 1 << 2;
+
+struct progressInfo
+{
+    curl_off_t dlnow;
+    curl_off_t dltotal;
+    double rate;
+};
+
+class DownloadInfo
+{
+    public:
+        void setFilename(const std::string& filename_)
+        {
+            std::unique_lock<std::mutex> lock(m);
+            filename = filename_;
+        }
+
+        std::string getFilename()
+        {
+            std::unique_lock<std::mutex> lock(m);
+            return filename;
+        }
+
+        void setStatus(const unsigned int& status_)
+        {
+            std::unique_lock<std::mutex> lock(m);
+            status = status_;
+        }
+
+        unsigned int getStatus()
+        {
+            std::unique_lock<std::mutex> lock(m);
+            return status;
+        }
+
+        void setProgressInfo(const progressInfo& info)
+        {
+            std::unique_lock<std::mutex> lock(m);
+            progress_info = info;
+        }
+
+        progressInfo getProgressInfo()
+        {
+            std::unique_lock<std::mutex> lock(m);
+            return progress_info;
+        }
+
+        DownloadInfo()=default;
+
+        DownloadInfo(const DownloadInfo& other)
+        {
+            std::lock_guard<std::mutex> guard(other.m);
+            filename = other.filename;
+            status = other.status;
+            progress_info = other.progress_info;
+        }
+
+        DownloadInfo& operator= (DownloadInfo& other)
+        {
+            if(&other == this)
+                return *this;
+
+            std::unique_lock<std::mutex> lock1(m, std::defer_lock);
+            std::unique_lock<std::mutex> lock2(other.m, std::defer_lock);
+            std::lock(lock1, lock2);
+            filename = other.filename;
+            status = other.status;
+            progress_info = other.progress_info;
+            return *this;
+        }
+    private:
+        std::string filename;
+        unsigned int status;
+        progressInfo progress_info;
+        mutable std::mutex m;
+};
+
+#endif // DOWNLOADINFO_H

include/ssl_thread_setup.h

@@ -0,0 +1,60 @@
+/* This program is free software. It comes without any warranty, to
+ * the extent permitted by applicable law. You can redistribute it
+ * and/or modify it under the terms of the Do What The Fuck You Want
+ * To Public License, Version 2, as published by Sam Hocevar. See
+ * http://www.wtfpl.net/ for more details. */
+
+#ifndef SSL_THREAD_SETUP_H
+#define SSL_THREAD_SETUP_H
+
+#include <thread>
+#include <mutex>
+
+#if SSL_THREAD_SETUP_OPENSSL == 1
+    #include <openssl/crypto.h>
+
+    static std::mutex* ssl_mutex_array;
+
+    void thread_locking_callback(int mode, int n, const char* file, int line)
+    {
+        if(mode & CRYPTO_LOCK)
+            ssl_mutex_array[n].lock();
+        else
+            ssl_mutex_array[n].unlock();
+    }
+
+    unsigned long thread_id_callback()
+    {
+        return (unsigned long)std::hash<std::thread::id>() (std::this_thread::get_id());
+    }
+
+    int ssl_thread_setup()
+    {
+        ssl_mutex_array = new std::mutex[CRYPTO_num_locks()];
+        if(!ssl_mutex_array)
+            return 0;
+        else
+        {
+            CRYPTO_set_id_callback(thread_id_callback);
+            CRYPTO_set_locking_callback(thread_locking_callback);
+        }
+        return 1;
+    }
+
+    int ssl_thread_cleanup()
+    {
+        if(!ssl_mutex_array)
+            return 0;
+
+        CRYPTO_set_id_callback(NULL);
+        CRYPTO_set_locking_callback(NULL);
+        delete[] ssl_mutex_array;
+        ssl_mutex_array = NULL;
+        return 1;
+    }
+#else
+    #define ssl_thread_setup()
+    #define ssl_thread_cleanup()
+#endif
+
+#endif // SSL_THREAD_SETUP_H

include/threadsafequeue.h

@@ -0,0 +1,84 @@
+/* This program is free software. It comes without any warranty, to
+ * the extent permitted by applicable law. You can redistribute it
+ * and/or modify it under the terms of the Do What The Fuck You Want
+ * To Public License, Version 2, as published by Sam Hocevar. See
+ * http://www.wtfpl.net/ for more details. */
+
+#ifndef THREADSAFEQUEUE_H
+#define THREADSAFEQUEUE_H
+
+#include <queue>
+#include <mutex>
+#include <condition_variable>
+
+template<typename T>
+class ThreadSafeQueue
+{
+    public:
+        void push(const T& item)
+        {
+            std::unique_lock<std::mutex> lock(m);
+            q.push(item);
+            lock.unlock();
+            cvar.notify_one();
+        }
+
+        bool empty() const
+        {
+            std::unique_lock<std::mutex> lock(m);
+            return q.empty();
+        }
+
+        typename std::queue<T>::size_type size() const
+        {
+            std::unique_lock<std::mutex> lock(m);
+            return q.size();
+        }
+
+        bool try_pop(T& item)
+        {
+            std::unique_lock<std::mutex> lock(m);
+            if(q.empty())
+                return false;
+
+            item = q.front();
+            q.pop();
+            return true;
+        }
+
+        void wait_and_pop(T& item)
+        {
+            std::unique_lock<std::mutex> lock(m);
+            while(q.empty())
+                cvar.wait(lock);
+
+            item = q.front();
+            q.pop();
+        }
+
+        ThreadSafeQueue() = default;
+
+        ThreadSafeQueue(const ThreadSafeQueue& other)
+        {
+            std::lock_guard<std::mutex> guard(other.m);
+            q = other.q;
+        }
+
+        ThreadSafeQueue& operator= (ThreadSafeQueue& other)
+        {
+            if(&other == this)
+                return *this;
+
+            std::unique_lock<std::mutex> lock1(m, std::defer_lock);
+            std::unique_lock<std::mutex> lock2(other.m, std::defer_lock);
+            std::lock(lock1, lock2);
+            q = other.q;
+            return *this;
+        }
+    private:
+        std::queue<T> q;
+        mutable std::mutex m;
+        std::condition_variable cvar;
+};
+
+#endif // THREADSAFEQUEUE_H

include/util.h

@@ -89,6 +89,7 @@ namespace Util
     std::string getOptionNameString(const unsigned int& value, const std::vector<GlobalConstants::optionsStruct>& options);
     void parseOptionString(const std::string &option_string, std::vector<unsigned int> &priority, unsigned int &type, const std::vector<GlobalConstants::optionsStruct>& options);
     std::string getLocalFileHash(const std::string& xml_dir, const std::string& filepath, const std::string& gamename = std::string());
+    void shortenStringToTerminalWidth(std::string& str);
 }
 
 #endif // UTIL_H

main.cpp

@@ -177,6 +177,7 @@ int main(int argc, char *argv[])
             ("exclude", bpo::value<std::string>(&sExcludeOptions)->default_value("covers"), ("Select what not to download/list/repair\n" + include_options_text).c_str())
             ("automatic-xml-creation", bpo::value<bool>(&config.bAutomaticXMLCreation)->zero_tokens()->default_value(false), "Automatically create XML data after download has completed")
             ("save-changelogs", bpo::value<bool>(&config.bSaveChangelogs)->zero_tokens()->default_value(false), "Save changelogs when downloading")
+            ("threads", bpo::value<unsigned int>(&config.iThreads)->default_value(4), "Number of download threads")
         ;
         // Options read from config file
         options_cfg_only.add_options()
@@ -311,6 +312,12 @@ int main(int argc, char *argv[])
         if (config.iWait > 0)
             config.iWait *= 1000;
 
+        if (config.iThreads < 1)
+        {
+            config.iThreads = 1;
+            set_vm_value(vm, "threads", config.iThreads);
+        }
+
         config.bVerifyPeer = !bInsecure;
         config.bColor = !bNoColor;
         config.bUnicode = !bNoUnicode;

src/downloader.cpp

@@ -7,6 +7,8 @@
 #include "downloader.h"
 #include "util.h"
 #include "globalconstants.h"
+#include "ssl_thread_setup.h"
+#include "downloadinfo.h"
 
 #include <cstdio>
 #include <cstdlib>
@@ -26,8 +28,14 @@
 
 namespace bptime = boost::posix_time;
 
+std::vector<DownloadInfo> vDownloadInfo;
+ThreadSafeQueue<gameFile> dlQueue;
+ThreadSafeQueue<std::string> msgQueue;
+ThreadSafeQueue<gameFile> createXMLQueue;
+
 Downloader::Downloader(Config &conf)
 {
+    ssl_thread_setup();
     this->config = conf;
     if (config.bLoginHTTP && boost::filesystem::exists(config.sCookiePath))
         if (!boost::filesystem::remove(config.sCookiePath))
@@ -44,6 +52,7 @@ Downloader::~Downloader()
     delete gogWebsite;
     curl_easy_cleanup(curlhandle);
     curl_global_cleanup();
+    ssl_thread_cleanup();
     // Make sure that cookie file is only readable/writable by owner
     Util::setFilePermissions(config.sCookiePath, boost::filesystem::owner_read | boost::filesystem::owner_write);
 }
@@ -931,192 +940,41 @@ void Downloader::download()
             if (!games[i].installers.empty())
             {
                 // Take path from installer path because for some games the base directory for installer/extra path is not "gamename"
-                std::string filepath = games[i].installers[0].getFilepath();
+                boost::filesystem::path filepath = boost::filesystem::absolute(games[i].installers[0].getFilepath(), boost::filesystem::current_path());
 
                 // Get base directory from filepath
-                boost::match_results<std::string::const_iterator> what;
-                boost::regex expression("(.*)/.*");
-                boost::regex_match(filepath, what, expression);
-                std::string directory = what[1];
+                std::string directory = filepath.parent_path().string();
 
                 this->downloadCovers(games[i].gamename, directory, coverXML);
             }
         }
-        // Download installers
+
         if (config.bInstallers)
         {
             for (unsigned int j = 0; j < games[i].installers.size(); ++j)
             {
-                // Not updated, skip to next installer
-                if (config.bUpdateCheck && !games[i].installers[j].updated)
-                    continue;
-
-                std::string filepath = games[i].installers[j].getFilepath();
-                if (config.blacklist.isBlacklisted(filepath))
-                {
-                    if (config.bVerbose)
-                        std::cerr << "skipped blacklisted file " << filepath << std::endl;
-                    continue;
-                }
-
-                // Get link
-                std::string url = gogAPI->getInstallerLink(games[i].gamename, games[i].installers[j].id);
-                if (gogAPI->getError())
-                {
-                    std::cerr << gogAPI->getErrorMessage() << std::endl;
-                    gogAPI->clearError();
-                    continue;
-                }
-
-                // Download
-                if (!url.empty())
-                {
-                    std::string XML;
-                    if (config.bRemoteXML)
-                    {
-                        XML = gogAPI->getXML(games[i].gamename, games[i].installers[j].id);
-                        if (gogAPI->getError())
-                        {
-                            std::cerr << gogAPI->getErrorMessage() << std::endl;
-                            gogAPI->clearError();
-                        }
-                    }
-                    if (!games[i].installers[j].name.empty())
-                        std::cout << "Downloading: " << games[i].installers[j].name << std::endl;
-                    std::cout << filepath << std::endl;
-                    this->downloadFile(url, filepath, XML, games[i].gamename);
-                    std::cout << std::endl;
-                }
+                dlQueue.push(games[i].installers[j]);
             }
         }
-        // Download extras
-        if (config.bExtras && !config.bUpdateCheck)
-        { // Save some time and don't process extras when running update check. Extras don't have updated flag, all of them would be skipped anyway.
-            for (unsigned int j = 0; j < games[i].extras.size(); ++j)
-            {
-                // Get link
-                std::string url = gogAPI->getExtraLink(games[i].gamename, games[i].extras[j].id);
-                if (gogAPI->getError())
-                {
-                    std::cerr << gogAPI->getErrorMessage() << std::endl;
-                    gogAPI->clearError();
-                    continue;
-                }
-
-                std::string filepath = games[i].extras[j].getFilepath();
-                if (config.blacklist.isBlacklisted(filepath))
-                {
-                    if (config.bVerbose)
-                        std::cerr << "skipped blacklisted file " << filepath << std::endl;
-                    continue;
-                }
-
-                // Download
-                if (!url.empty())
-                {
-                    if (!games[i].extras[j].name.empty())
-                        std::cout << "Downloading: " << games[i].extras[j].name << std::endl;
-                    std::cout << filepath << std::endl;
-                    CURLcode result = this->downloadFile(url, filepath);
-                    std::cout << std::endl;
-                    if (result==CURLE_OK && config.bAutomaticXMLCreation)
-                    {
-                        std::cout << "Starting automatic XML creation" << std::endl;
-                        std::string xml_dir = config.sXMLDirectory + "/" + games[i].gamename;
-                        Util::createXML(filepath, config.iChunkSize, xml_dir);
-                        std::cout << std::endl;
-                    }
-                }
-            }
-        }
-        // Download patches
         if (config.bPatches)
         {
             for (unsigned int j = 0; j < games[i].patches.size(); ++j)
             {
-                // Not updated, skip to next patch
-                if (config.bUpdateCheck && !games[i].patches[j].updated)
-                    continue;
-
-                // Get link
-                std::string url = gogAPI->getPatchLink(games[i].gamename, games[i].patches[j].id);
-                if (gogAPI->getError())
-                {
-                    std::cerr << gogAPI->getErrorMessage() << std::endl;
-                    gogAPI->clearError();
-                    continue;
-                }
-
-                std::string filepath = games[i].patches[j].getFilepath();
-                if (config.blacklist.isBlacklisted(filepath))
-                {
-                    if (config.bVerbose)
-                        std::cerr << "skipped blacklisted file " << filepath << std::endl;
-                    continue;
-                }
-
-                // Download
-                if (!url.empty())
-                {
-                    std::string XML;
-                    if (config.bRemoteXML)
-                    {
-                        XML = gogAPI->getXML(games[i].gamename, games[i].patches[j].id);
-                        if (gogAPI->getError())
-                        {
-                            std::cerr << gogAPI->getErrorMessage() << std::endl;
-                            gogAPI->clearError();
-                        }
-                    }
-                    if (!games[i].patches[j].name.empty())
-                        std::cout << "Downloading: " << games[i].patches[j].name << std::endl;
-                    std::cout << filepath << std::endl;
-                    this->downloadFile(url, filepath, XML, games[i].gamename);
-                    std::cout << std::endl;
-                }
+                dlQueue.push(games[i].patches[j]);
+            }
+        }
+        if (config.bExtras)
+        {
+            for (unsigned int j = 0; j < games[i].extras.size(); ++j)
+            {
+                dlQueue.push(games[i].extras[j]);
             }
         }
-        // Download language packs
         if (config.bLanguagePacks)
         {
             for (unsigned int j = 0; j < games[i].languagepacks.size(); ++j)
             {
-                // Get link
-                std::string url = gogAPI->getLanguagePackLink(games[i].gamename, games[i].languagepacks[j].id);
-                if (gogAPI->getError())
-                {
-                    std::cerr << gogAPI->getErrorMessage() << std::endl;
-                    gogAPI->clearError();
-                    continue;
-                }
-
-                std::string filepath = games[i].languagepacks[j].getFilepath();
-                if (config.blacklist.isBlacklisted(filepath))
-                {
-                    if (config.bVerbose)
-                        std::cerr << "skipped blacklisted file " << filepath << std::endl;
-                    continue;
-                }
-
-                // Download
-                if (!url.empty())
-                {
-                    std::string XML;
-                    if (config.bRemoteXML)
-                    {
-                        XML = gogAPI->getXML(games[i].gamename, games[i].languagepacks[j].id);
-                        if (gogAPI->getError())
-                        {
-                            std::cerr << gogAPI->getErrorMessage() << std::endl;
-                            gogAPI->clearError();
-                        }
-                    }
-                    if (!games[i].languagepacks[j].name.empty())
-                        std::cout << "Downloading: " << games[i].gamename << " " << games[i].languagepacks[j].name << std::endl;
-                    std::cout << filepath << std::endl;
-                    this->downloadFile(url, filepath, XML, games[i].gamename);
-                    std::cout << std::endl;
-                }
+                dlQueue.push(games[i].languagepacks[j]);
             }
         }
         if (config.bDLC && !games[i].dlcs.empty())
@@ -1138,127 +996,57 @@ void Downloader::download()
                 {
                     for (unsigned int k = 0; k < games[i].dlcs[j].installers.size(); ++k)
                     {
-                        std::string filepath = games[i].dlcs[j].installers[k].getFilepath();
-                        if (config.blacklist.isBlacklisted(filepath))
-                        {
-                            if (config.bVerbose)
-                                std::cerr << "skipped blacklisted file " << filepath << std::endl;
-                            continue;
-                        }
-
-                        // Get link
-                        std::string url = gogAPI->getInstallerLink(games[i].dlcs[j].gamename, games[i].dlcs[j].installers[k].id);
-                        if (gogAPI->getError())
-                        {
-                            std::cerr << gogAPI->getErrorMessage() << std::endl;
-                            gogAPI->clearError();
-                            continue;
-                        }
-
-                        // Download
-                        if (!url.empty())
-                        {
-                            std::string XML;
-                            if (config.bRemoteXML)
-                            {
-                                XML = gogAPI->getXML(games[i].dlcs[j].gamename, games[i].dlcs[j].installers[k].id);
-                                if (gogAPI->getError())
-                                {
-                                    std::cerr << gogAPI->getErrorMessage() << std::endl;
-                                    gogAPI->clearError();
-                                }
-                            }
-                            if (!games[i].dlcs[j].installers[k].name.empty())
-                                std::cout << "Downloading: " << games[i].dlcs[j].installers[k].name << std::endl;
-                            std::cout << filepath << std::endl;
-                            this->downloadFile(url, filepath, XML, games[i].dlcs[j].gamename);
-                            std::cout << std::endl;
-                        }
+                        dlQueue.push(games[i].dlcs[j].installers[k]);
                     }
                 }
                 if (config.bPatches)
                 {
                     for (unsigned int k = 0; k < games[i].dlcs[j].patches.size(); ++k)
                     {
-                        std::string filepath = games[i].dlcs[j].patches[k].getFilepath();
-                        if (config.blacklist.isBlacklisted(filepath))
-                        {
-                            if (config.bVerbose)
-                                std::cerr << "skipped blacklisted file " << filepath << std::endl;
-                            continue;
-                        }
-
-                        // Get link
-                        std::string url = gogAPI->getPatchLink(games[i].dlcs[j].gamename, games[i].dlcs[j].patches[k].id);
-                        if (gogAPI->getError())
-                        {
-                            std::cerr << gogAPI->getErrorMessage() << std::endl;
-                            gogAPI->clearError();
-                            continue;
-                        }
-
-                        // Download
-                        if (!url.empty())
-                        {
-                            std::string XML;
-                            if (config.bRemoteXML)
-                            {
-                                XML = gogAPI->getXML(games[i].dlcs[j].gamename, games[i].dlcs[j].patches[k].id);
-                                if (gogAPI->getError())
-                                {
-                                    std::cerr << gogAPI->getErrorMessage() << std::endl;
-                                    gogAPI->clearError();
-                                }
-                            }
-                            if (!games[i].dlcs[j].patches[k].name.empty())
-                                std::cout << "Downloading: " << games[i].dlcs[j].patches[k].name << std::endl;
-                            std::cout << filepath << std::endl;
-                            this->downloadFile(url, filepath, XML, games[i].dlcs[j].gamename);
-                            std::cout << std::endl;
-                        }
+                        dlQueue.push(games[i].dlcs[j].patches[k]);
                     }
                 }
                 if (config.bExtras)
                 {
                     for (unsigned int k = 0; k < games[i].dlcs[j].extras.size(); ++k)
                     {
-                        std::string filepath = games[i].dlcs[j].extras[k].getFilepath();
-                        if (config.blacklist.isBlacklisted(filepath))
-                        {
-                            if (config.bVerbose)
-                                std::cerr << "skipped blacklisted file " << filepath << std::endl;
-                            continue;
-                        }
-
-                        // Get link
-                        std::string url = gogAPI->getExtraLink(games[i].dlcs[j].gamename, games[i].dlcs[j].extras[k].id);
-                        if (gogAPI->getError())
-                        {
-                            std::cerr << gogAPI->getErrorMessage() << std::endl;
-                            gogAPI->clearError();
-                            continue;
-                        }
-
-                        // Download
-                        if (!url.empty())
-                        {
-                            if (!games[i].dlcs[j].extras[k].name.empty())
-                                std::cout << "Dowloading: " << games[i].dlcs[j].extras[k].name << std::endl;
-                            CURLcode result = this->downloadFile(url, filepath);
-                            std::cout << std::endl;
-                            if (result==CURLE_OK && config.bAutomaticXMLCreation)
-                            {
-                                std::cout << "Starting automatic XML creation" << std::endl;
-                                std::string xml_dir = config.sXMLDirectory + "/" + games[i].dlcs[j].gamename;
-                                Util::createXML(filepath, config.iChunkSize, xml_dir);
-                                std::cout << std::endl;
-                            }
-                        }
+                        dlQueue.push(games[i].dlcs[j].extras[k]);
                     }
                 }
             }
         }
     }
+
+    // Create download threads
+    std::vector<std::thread> vThreads;
+    for (unsigned int i = 0; i < config.iThreads; ++i)
+    {
+        DownloadInfo dlInfo;
+        dlInfo.setStatus(DLSTATUS_NOTSTARTED);
+        vDownloadInfo.push_back(dlInfo);
+        vThreads.push_back(std::thread(Downloader::processDownloadQueue, this->config, i));
+    }
+
+    this->printProgress();
+
+    // Join threads
+    for (unsigned int i = 0; i < vThreads.size(); ++i)
+        vThreads[i].join();
+
+    vThreads.clear();
+    vDownloadInfo.clear();
+
+    // Create xml data for all files in the queue
+    if (!createXMLQueue.empty())
+    {
+        std::cout << "Starting XML creation" << std::endl;
+        gameFile gf;
+        while (createXMLQueue.try_pop(gf))
+        {
+            std::string xml_directory = config.sXMLDirectory + "/" + gf.gamename;
+            Util::createXML(gf.getFilepath(), config.iChunkSize, xml_directory);
+        }
+    }
 }
 
 // Download a file, resume if possible
@@ -2989,3 +2777,477 @@ void Downloader::showWishlist()
 
     return;
 }
+
+void Downloader::processDownloadQueue(Config conf, const unsigned int& tid)
+{
+    std::string msg_prefix = "[Thread #" + std::to_string(tid) + "] ";
+
+    API* api = new API(conf.sToken, conf.sSecret);
+    if (!api->init())
+    {
+        delete api;
+        msgQueue.push(msg_prefix + "API init failed");
+        vDownloadInfo[tid].setStatus(DLSTATUS_FINISHED);
+        return;
+    }
+
+    CURL* dlhandle = curl_easy_init();
+    curl_easy_setopt(dlhandle, CURLOPT_FOLLOWLOCATION, 1);
+    curl_easy_setopt(dlhandle, CURLOPT_USERAGENT, conf.sVersionString.c_str());
+    curl_easy_setopt(dlhandle, CURLOPT_NOPROGRESS, 0);
+
+    curl_easy_setopt(dlhandle, CURLOPT_CONNECTTIMEOUT, conf.iTimeout);
+    curl_easy_setopt(dlhandle, CURLOPT_FAILONERROR, true);
+    curl_easy_setopt(dlhandle, CURLOPT_SSL_VERIFYPEER, conf.bVerifyPeer);
+    curl_easy_setopt(dlhandle, CURLOPT_VERBOSE, conf.bVerbose);
+    curl_easy_setopt(dlhandle, CURLOPT_WRITEFUNCTION, Downloader::writeData);
+    curl_easy_setopt(dlhandle, CURLOPT_READFUNCTION, Downloader::readData);
+    curl_easy_setopt(dlhandle, CURLOPT_MAX_RECV_SPEED_LARGE, conf.iDownloadRate);
+
+    // Assume that we have connection error and abort transfer with CURLE_OPERATION_TIMEDOUT if download speed is less than 200 B/s for 30 seconds
+    curl_easy_setopt(dlhandle, CURLOPT_LOW_SPEED_TIME, 30);
+    curl_easy_setopt(dlhandle, CURLOPT_LOW_SPEED_LIMIT, 200);
+
+    xferInfo xferinfo;
+    xferinfo.tid = tid;
+    xferinfo.curlhandle = dlhandle;
+
+    curl_easy_setopt(dlhandle, CURLOPT_XFERINFOFUNCTION, Downloader::progressCallbackForThread);
+    curl_easy_setopt(dlhandle, CURLOPT_XFERINFODATA, &xferinfo);
+
+    gameFile gf;
+    while (dlQueue.try_pop(gf))
+    {
+        CURLcode result = CURLE_RECV_ERROR; // assume network error
+        int iRetryCount = 0;
+        off_t iResumePosition = 0;
+
+        vDownloadInfo[tid].setStatus(DLSTATUS_STARTING);
+
+        // Get directory from filepath
+        boost::filesystem::path filepath = gf.getFilepath();
+        filepath = boost::filesystem::absolute(filepath, boost::filesystem::current_path());
+        boost::filesystem::path directory = filepath.parent_path();
+
+        // Skip blacklisted files
+        if (conf.blacklist.isBlacklisted(filepath.string()))
+        {
+            if (conf.bVerbose)
+                msgQueue.push(msg_prefix + "Skipped blacklisted file: " + filepath.string());
+            continue;
+        }
+
+        std::string filenameXML = filepath.filename().string() + ".xml";
+        std::string xml_directory = conf.sXMLDirectory + "/" + gf.gamename;
+        boost::filesystem::path local_xml_file = xml_directory + "/" + filenameXML;
+
+        vDownloadInfo[tid].setFilename(filepath.filename().string());
+        msgQueue.push(msg_prefix + "Starting download: " + filepath.filename().string());
+
+        // Check that directory exists and create subdirectories
+        if (boost::filesystem::exists(directory))
+        {
+            if (!boost::filesystem::is_directory(directory))
+            {
+                msgQueue.push(msg_prefix + directory.string() + " is not directory");
+                continue;
+            }
+        }
+        else
+        {
+            if (!boost::filesystem::create_directories(directory))
+            {
+                msgQueue.push(msg_prefix + "Failed to create directory: " + directory.string());
+                continue;
+            }
+        }
+
+        bool bSameVersion = true; // assume same version
+        bool bLocalXMLExists = boost::filesystem::exists(local_xml_file); // This is additional check to see if remote xml should be saved to speed up future version checks
+
+        std::string xml;
+        if (gf.type & (GFTYPE_INSTALLER | GFTYPE_PATCH) && conf.bRemoteXML)
+        {
+            xml = api->getXML(gf.gamename, gf.id);
+            if (api->getError())
+            {
+                msgQueue.push(msg_prefix + api->getErrorMessage());
+                api->clearError();
+            }
+            else
+            {
+                if (!xml.empty())
+                {
+                    std::string localHash = Util::getLocalFileHash(conf.sXMLDirectory, filepath.string(), gf.gamename);
+                    // Do version check if local hash exists
+                    if (!localHash.empty())
+                    {
+                        tinyxml2::XMLDocument remote_xml;
+                        remote_xml.Parse(xml.c_str());
+                        tinyxml2::XMLElement *fileElem = remote_xml.FirstChildElement("file");
+                        if (fileElem)
+                        {
+                            std::string remoteHash = fileElem->Attribute("md5");
+                            if (remoteHash != localHash)
+                                bSameVersion = false;
+                        }
+                    }
+                }
+            }
+        }
+
+        bool bResume = false;
+        if (boost::filesystem::exists(filepath) && boost::filesystem::is_regular_file(filepath))
+        {
+            if (bSameVersion)
+            {
+                bResume = true;
+            }
+            else
+            {
+                msgQueue.push(msg_prefix + "Remote file is different, renaming local file");
+                std::string date_old = "." + bptime::to_iso_string(bptime::second_clock::local_time()) + ".old";
+                boost::filesystem::path new_name = filepath.string() + date_old; // Rename old file by appending date and ".old" to filename
+                boost::system::error_code ec;
+                boost::filesystem::rename(filepath, new_name, ec); // Rename the file
+                if (ec)
+                {
+                    msgQueue.push(msg_prefix + "Failed to rename " + filepath.string() + " to " + new_name.string() + "\nSkipping file");
+                    continue;
+                }
+            }
+        }
+
+        // Save remote XML
+        if (!xml.empty())
+        {
+            if ((bLocalXMLExists && !bSameVersion) || !bLocalXMLExists)
+            {
+                // Check that directory exists and create subdirectories
+                boost::filesystem::path path = xml_directory;
+                if (boost::filesystem::exists(path))
+                {
+                    if (!boost::filesystem::is_directory(path))
+                    {
+                        msgQueue.push(msg_prefix + path.string() + " is not directory");
+                    }
+                }
+                else
+                {
+                    if (!boost::filesystem::create_directories(path))
+                    {
+                        msgQueue.push(msg_prefix + "Failed to create directory: " + path.string());
+                    }
+                }
+                std::ofstream ofs(local_xml_file.string().c_str());
+                if (ofs)
+                {
+                    ofs << xml;
+                    ofs.close();
+                }
+                else
+                {
+                    msgQueue.push(msg_prefix + "Can't create " + local_xml_file.string());
+                }
+            }
+        }
+
+        // Get download url
+        std::string url;
+        if (gf.type == GFTYPE_INSTALLER)
+            url = api->getInstallerLink(gf.gamename, gf.id);
+        else if (gf.type == GFTYPE_PATCH)
+            url = api->getPatchLink(gf.gamename, gf.id);
+        else if (gf.type == GFTYPE_LANGPACK)
+            url = api->getLanguagePackLink(gf.gamename, gf.id);
+        else if (gf.type == GFTYPE_EXTRA)
+            url = api->getExtraLink(gf.gamename, gf.id);
+        else
+            url = api->getExtraLink(gf.gamename, gf.id); // assume extra if type didn't match any of the others
+
+        if (api->getError())
+        {
+            msgQueue.push(msg_prefix + api->getErrorMessage());
+            api->clearError();
+            continue;
+        }
+
+        curl_easy_setopt(dlhandle, CURLOPT_URL, url.c_str());
+        do
+        {
+            if (iRetryCount != 0)
+                msgQueue.push(msg_prefix + "Retry " + std::to_string(iRetryCount) + "/" + std::to_string(conf.iRetries) + ": " + filepath.filename().string());
+
+            FILE* outfile;
+            // File exists, resume
+            if (bResume)
+            {
+                iResumePosition = boost::filesystem::file_size(filepath);
+                if ((outfile=fopen(filepath.string().c_str(), "r+"))!=NULL)
+                {
+                    fseek(outfile, 0, SEEK_END);
+                    curl_easy_setopt(dlhandle, CURLOPT_RESUME_FROM_LARGE, iResumePosition);
+                    curl_easy_setopt(dlhandle, CURLOPT_WRITEDATA, outfile);
+                }
+                else
+                {
+                    msgQueue.push(msg_prefix + "Failed to open " + filepath.string());
+                    break;
+                }
+            }
+            else // File doesn't exist, create new file
+            {
+                if ((outfile=fopen(filepath.string().c_str(), "w"))!=NULL)
+                {
+                    curl_easy_setopt(dlhandle, CURLOPT_RESUME_FROM_LARGE, 0); // start downloading from the beginning of file
+                    curl_easy_setopt(dlhandle, CURLOPT_WRITEDATA, outfile);
+                }
+                else
+                {
+                    msgQueue.push(msg_prefix + "Failed to create " + filepath.string());
+                    break;
+                }
+            }
+
+            xferinfo.offset = iResumePosition;
+            xferinfo.timer.reset();
+            xferinfo.TimeAndSize.clear();
+            result = curl_easy_perform(dlhandle);
+            fclose(outfile);
+
+            if (result == CURLE_PARTIAL_FILE || result == CURLE_OPERATION_TIMEDOUT)
+            {
+                iRetryCount++;
+                if (boost::filesystem::exists(filepath) && boost::filesystem::is_regular_file(filepath))
+                    bResume = true;
+            }
+
+        } while ((result == CURLE_PARTIAL_FILE || result == CURLE_OPERATION_TIMEDOUT) && (iRetryCount <= conf.iRetries));
+
+        long int response_code = 0;
+        if (result == CURLE_HTTP_RETURNED_ERROR)
+        {
+            curl_easy_getinfo(dlhandle, CURLINFO_RESPONSE_CODE, &response_code);
+        }
+        if (result == CURLE_OK || result == CURLE_RANGE_ERROR || (result == CURLE_HTTP_RETURNED_ERROR && response_code == 416))
+            msgQueue.push(msg_prefix + "Finished download: " + filepath.filename().string());
+        else
+        {
+            msgQueue.push(msg_prefix + "Finished download (" + static_cast<std::string>(curl_easy_strerror(result)) + "): " + filepath.filename().string());
+        }
+
+        // Automatic xml creation
+        if (conf.bAutomaticXMLCreation)
+        {
+            if (result == CURLE_OK)
+            {
+                if ((gf.type & GFTYPE_EXTRA) || (conf.bRemoteXML && !bLocalXMLExists && xml.empty()))
+                    createXMLQueue.push(gf);
+            }
+        }
+    }
+
+    curl_easy_cleanup(dlhandle);
+    delete api;
+
+    vDownloadInfo[tid].setStatus(DLSTATUS_FINISHED);
+    msgQueue.push(msg_prefix + "Finished all tasks");
+
+    return;
+}
+
+int Downloader::progressCallbackForThread(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow)
+{
+    // unused so lets prevent warnings and be more pedantic
+    (void) ulnow;
+    (void) ultotal;
+
+    xferInfo* xferinfo = static_cast<xferInfo*>(clientp);
+
+    // Update progress info every 100ms
+    if (xferinfo->timer.getTimeBetweenUpdates()>=100 || dlnow == dltotal)
+    {
+        xferinfo->timer.reset();
+        progressInfo info;
+        info.dlnow = dlnow;
+        info.dltotal = dltotal;
+
+        // trying to get rate and setting to NaN if it fails
+        if (CURLE_OK != curl_easy_getinfo(xferinfo->curlhandle, CURLINFO_SPEED_DOWNLOAD, &info.rate))
+           info.rate = std::numeric_limits<double>::quiet_NaN();
+
+        // setting full dlwnow and dltotal
+        if (xferinfo->offset > 0)
+        {
+            info.dlnow   += xferinfo->offset;
+            info.dltotal += xferinfo->offset;
+        }
+
+        // 10 second average download speed
+        // Don't use static value of 10 seconds because update interval depends on when and how often progress callback is called
+        xferinfo->TimeAndSize.push_back(std::make_pair(time(NULL), static_cast<uintmax_t>(info.dlnow)));
+        if (xferinfo->TimeAndSize.size() > 100) // 100 * 100ms = 10s
+        {
+            xferinfo->TimeAndSize.pop_front();
+            time_t time_first = xferinfo->TimeAndSize.front().first;
+            uintmax_t size_first = xferinfo->TimeAndSize.front().second;
+            time_t time_last = xferinfo->TimeAndSize.back().first;
+            uintmax_t size_last = xferinfo->TimeAndSize.back().second;
+            info.rate = (size_last - size_first) / static_cast<double>((time_last - time_first));
+        }
+
+        vDownloadInfo[xferinfo->tid].setProgressInfo(info);
+        vDownloadInfo[xferinfo->tid].setStatus(DLSTATUS_RUNNING);
+    }
+
+    return 0;
+}
+
+void Downloader::printProgress()
+{
+    // Print progress information until all threads have finished their tasks
+    ProgressBar bar(config.bUnicode, config.bColor);
+    unsigned int dl_status = DLSTATUS_NOTSTARTED;
+    while (dl_status != DLSTATUS_FINISHED)
+    {
+        dl_status = DLSTATUS_NOTSTARTED;
+
+        // Print progress information once per 100ms
+        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        std::cout << "\033[J\r" << std::flush; // Clear screen from the current line down to the bottom of the screen
+
+        // Print messages from message queue first
+        std::string msg;
+        while (msgQueue.try_pop(msg))
+        {
+            std::cout << msg << std::endl;
+            if (config.bReport)
+            {
+                this->report_ofs << bptime::to_simple_string(bptime::second_clock::local_time()) << ": " << msg << std::endl;
+            }
+        }
+
+        int iTermWidth = Util::getTerminalWidth();
+        double total_rate = 0;
+
+        // Create progress info text for all download threads
+        std::vector<std::string> vProgressText;
+        for (unsigned int i = 0; i < vDownloadInfo.size(); ++i)
+        {
+            std::string progress_text;
+            int bar_length     = 26;
+            int min_bar_length = 5;
+
+            unsigned int status = vDownloadInfo[i].getStatus();
+            dl_status |= status;
+
+            if (status == DLSTATUS_FINISHED)
+            {
+                vProgressText.push_back("#" + std::to_string(i) + ": Finished");
+                continue;
+            }
+
+            std::string filename = vDownloadInfo[i].getFilename();
+            progressInfo progress_info = vDownloadInfo[i].getProgressInfo();
+            total_rate += progress_info.rate;
+
+            bool starting = ((0 == progress_info.dlnow) && (0 == progress_info.dltotal));
+            double fraction = starting ? 0.0 : static_cast<double>(progress_info.dlnow) / static_cast<double>(progress_info.dltotal);
+
+            char progress_percentage_text[200];
+            sprintf(progress_percentage_text, "%3.0f%% ", fraction * 100);
+            int progress_percentage_text_length = strlen(progress_percentage_text);
+
+            bptime::time_duration eta(bptime::seconds((long)((progress_info.dltotal - progress_info.dlnow) / progress_info.rate)));
+            std::stringstream eta_ss;
+            if (eta.hours() > 23)
+            {
+               eta_ss << eta.hours() / 24 << "d " <<
+                         std::setfill('0') << std::setw(2) << eta.hours() % 24 << "h " <<
+                         std::setfill('0') << std::setw(2) << eta.minutes() << "m " <<
+                         std::setfill('0') << std::setw(2) << eta.seconds() << "s";
+            }
+            else if (eta.hours() > 0)
+            {
+               eta_ss << eta.hours() << "h " <<
+                         std::setfill('0') << std::setw(2) << eta.minutes() << "m " <<
+                         std::setfill('0') << std::setw(2) << eta.seconds() << "s";
+            }
+            else if (eta.minutes() > 0)
+            {
+               eta_ss << eta.minutes() << "m " <<
+                         std::setfill('0') << std::setw(2) << eta.seconds() << "s";
+            }
+            else
+            {
+               eta_ss << eta.seconds() << "s";
+            }
+
+            std::string rate_unit;
+            if (progress_info.rate > 1048576) // 1 MB
+            {
+                progress_info.rate /= 1048576;
+                rate_unit = "MB/s";
+            }
+            else
+            {
+                progress_info.rate /= 1024;
+                rate_unit = "kB/s";
+            }
+
+            char progress_status_text[200]; // We're probably never going to go as high as 200 characters but it's better to use too big number here than too small
+            sprintf(progress_status_text, " %0.2f/%0.2fMB @ %0.2f%s ETA: %s", static_cast<double>(progress_info.dlnow)/1024/1024, static_cast<double>(progress_info.dltotal)/1024/1024, progress_info.rate, rate_unit.c_str(), eta_ss.str().c_str());
+            int status_text_length = strlen(progress_status_text) + 1;
+
+            if ((status_text_length + progress_percentage_text_length + bar_length) > iTermWidth)
+                bar_length -= (status_text_length + progress_percentage_text_length + bar_length) - iTermWidth;
+
+            // Don't draw progressbar if length is less than min_bar_length
+            std::string progress_bar_text;
+            if (bar_length >= min_bar_length)
+                progress_bar_text = bar.createBarString(bar_length, fraction);
+
+            progress_text = std::string(progress_percentage_text) + progress_bar_text + std::string(progress_status_text);
+            std::string filename_text = "#" + std::to_string(i) + " " + filename;
+            Util::shortenStringToTerminalWidth(filename_text);
+
+            vProgressText.push_back(filename_text);
+            vProgressText.push_back(progress_text);
+        }
+
+        // Total download speed and number of remaining tasks in download queue
+        if (dl_status != DLSTATUS_FINISHED)
+        {
+            std::ostringstream ss;
+            if (config.iThreads > 1)
+            {
+                std::string rate_unit;
+                if (total_rate > 1048576) // 1 MB
+                {
+                    total_rate /= 1048576;
+                    rate_unit = "MB/s";
+                }
+                else
+                {
+                    total_rate /= 1024;
+                    rate_unit = "kB/s";
+                }
+                ss << "Total: " << std::setprecision(2) << std::fixed << total_rate << rate_unit << " | ";
+            }
+            ss << "Remaining: " << dlQueue.size();
+            vProgressText.push_back(ss.str());
+        }
+
+        // Print progress info
+        for (unsigned int i = 0; i < vProgressText.size(); ++i)
+        {
+            std::cout << vProgressText[i] << std::endl;
+        }
+
+        // Move cursor up by vProgressText.size() rows
+        if (dl_status != DLSTATUS_FINISHED)
+        {
+            std::cout << "\033[" << vProgressText.size() << "A\r" << std::flush;
+        }
+    }
+}

src/util.cpp

@@ -569,3 +569,17 @@ std::string Util::getLocalFileHash(const std::string& xml_dir, const std::string
 
     return localHash;
 }
+
+void Util::shortenStringToTerminalWidth(std::string& str)
+{
+    int iStrLen = static_cast<int>(str.length());
+    int iTermWidth = Util::getTerminalWidth();
+    if (iStrLen >= iTermWidth)
+    {
+        size_t chars_to_remove = (iStrLen - iTermWidth) + 4;
+        size_t middle = iStrLen / 2;
+        size_t pos1 = middle - (chars_to_remove / 2);
+        size_t pos2 = middle + (chars_to_remove / 2);
+        str.replace(str.begin()+pos1, str.begin()+pos2, "...");
+    }
+}