Make the downloader use the aria2c wrapper instead of the aria2 library.

include/downloader.h

@@ -21,15 +21,13 @@
 #define KIWIX_DOWNLOADER_H
 
 #include <string>
-#ifdef ENABLE_LIBARIA2
-# include <aria2/aria2.h>
-#endif
 #include <pthread.h>
+#include <memory>
 
 namespace kiwix
 {
 
-
+class Aria2;
 struct DownloadedFile {
   DownloadedFile()
    : success(false) {}
@@ -56,17 +54,8 @@ class Downloader
   DownloadedFile download(const std::string& url);
 
  private:
-  static pthread_mutex_t globalLock;
 
-  std::string tmpDir;
-#ifdef ENABLE_LIBARIA2
-  DownloadedFile* fileHandle;
-  aria2::Session* session;
-  static int downloadEventCallback(aria2::Session* session,
-                                   aria2::DownloadEvent event,
-                                   aria2::A2Gid gid,
-                                   void* userData);
-#endif
+  std::unique_ptr<Aria2> mp_aria;
 };
 }
 

meson.build

@@ -18,7 +18,6 @@ libicu_dep = dependency('icu-i18n', static:static_deps)
 libzim_dep = dependency('libzim', version : '>=4.0.0', static:static_deps)
 pugixml_dep = dependency('pugixml', static:static_deps)
 libcurl_dep = dependency('libcurl', static:static_deps)
-libaria2_dep = dependency('libaria2', static:static_deps, required:false)
 
 ctpp2_include_path = ''
 has_ctpp2_dep = false
@@ -79,7 +78,7 @@ endif
 
 xapian_dep = dependency('xapian-core', required:false, static:static_deps)
 
-all_deps = [thread_dep, libicu_dep, libzim_dep, xapian_dep, pugixml_dep, libcurl_dep, libaria2_dep]
+all_deps = [thread_dep, libicu_dep, libzim_dep, xapian_dep, pugixml_dep, libcurl_dep]
 if has_ctpp2_dep
   all_deps += [ctpp2_dep]
 endif
@@ -89,7 +88,6 @@ inc = include_directories('include')
 conf = configuration_data()
 conf.set('VERSION', '"@0@"'.format(meson.project_version()))
 conf.set('ENABLE_CTPP2', has_ctpp2_dep)
-conf.set('ENABLE_LIBARIA2', libaria2_dep.found())
 
 if build_machine.system() == 'windows'
      extra_link_args = ['-lshlwapi', '-lwinmm']
@@ -104,9 +102,6 @@ subdir('src')
 subdir('test')
 
 pkg_requires = ['libzim', 'icu-i18n', 'pugixml', 'libcurl']
-if libaria2_dep.found()
-    pkg_requires += ['libaria2']
-endif
 if xapian_dep.found()
     pkg_requires += ['xapian-core']
 endif

src/config.h.in

@@ -2,5 +2,3 @@
 #mesondefine VERSION
 
 #mesondefine ENABLE_CTPP2
-
-#mesondefine ENABLE_LIBARIA2

src/downloader.cpp

@@ -20,101 +20,73 @@
 #include "downloader.h"
 #include "common/pathTools.h"
 
-#ifndef _WIN32
-# include <unistd.h>
-#endif
+#include <thread>
+#include <chrono>
+
 #include <iostream>
 
+#include "aria2.h"
+#include "xmlrpc.h"
+#include "common/otherTools.h"
+#include <pugixml.hpp>
+
 namespace kiwix
 {
 
-pthread_mutex_t Downloader::globalLock = PTHREAD_MUTEX_INITIALIZER;
-
-
 /* Constructor */
-Downloader::Downloader()
+Downloader::Downloader() :
+  mp_aria(new Aria2())
 {
-#ifdef ENABLE_LIBARIA2
-  aria2::SessionConfig config;
-  config.downloadEventCallback = Downloader::downloadEventCallback;
-  config.userData = this;
-  tmpDir = makeTmpDirectory();
-  aria2::KeyVals options;
-  options.push_back(std::pair<std::string, std::string>("dir", tmpDir));
-  session = aria2::sessionNew(options, config);
-#endif
 }
 
 
 /* Destructor */
 Downloader::~Downloader()
 {
-#ifdef ENABLE_LIBARIA2
-  aria2::sessionFinal(session);
-#endif
-  rmdir(tmpDir.c_str());
 }
 
-#ifdef ENABLE_LIBARIA2
-int Downloader::downloadEventCallback(aria2::Session* session,
-                                      aria2::DownloadEvent event,
-                                      aria2::A2Gid gid,
-                                      void* userData)
-{
-  Downloader* downloader = static_cast<Downloader*>(userData);
-
-  auto fileHandle = downloader->fileHandle;
-  auto dh = aria2::getDownloadHandle(session, gid);
-
-  if (!dh) {
-    return 0;
+pugi::xml_node find_member_in_struct(pugi::xml_node struct_node, std::string member_name) {
+  for(auto member=struct_node.first_child(); member; member=member.next_sibling()) {
+    std::string _member_name = member.child("name").text().get();
+    if (_member_name == member_name) {
+      return member.child("value");
+    }
   }
-
-  switch (event) {
-    case aria2::EVENT_ON_DOWNLOAD_COMPLETE:
-      {
-        if (dh->getNumFiles() > 0) {
-          auto f = dh->getFile(1);
-          fileHandle->path = f.path;
-          fileHandle->success = true;
-        }
-      }
-      break;
-    case aria2::EVENT_ON_DOWNLOAD_ERROR:
-      {
-        fileHandle->success = false;
-      }
-      break;
-    default:
-      break;
-  }
-  aria2::deleteDownloadHandle(dh);
-  return 0;
+  return pugi::xml_node();
 }
-#endif
 
 DownloadedFile Downloader::download(const std::string& url) {
-  pthread_mutex_lock(&globalLock);
   DownloadedFile fileHandle;
-#ifdef ENABLE_LIBARIA2
   try {
     std::vector<std::string> uris = {url};
-    aria2::KeyVals options;
-    aria2::A2Gid gid;
-    int ret;
-    DownloadedFile fileHandle;
+    std::vector<std::string> status_key = {"status", "files"};
+    std::string gid;
     
-    ret = aria2::addUri(session, &gid, uris, options);
-    if (ret < 0) {
-      std::cerr << "Failed to download" << std::endl;
-    } else {
-      this->fileHandle = &fileHandle;
-      aria2::run(session, aria2::RUN_DEFAULT);
+    gid = mp_aria->addUri(uris);
+    std::cerr << "gid is : " << gid << std::endl;
+    pugi::xml_document ret;
+    while(true) {
+     auto strStatus = mp_aria->tellStatus(gid, status_key);
+     MethodResponse response(strStatus);
+     auto structNode = response.getParams().getParam(0).getValue().getStruct();
+     auto status = structNode.getMember("status").getValue().getAsS();
+     std::cerr << "Status is " << status << std::endl;
+     if (status  == "complete") {
+       fileHandle.success = true;
+       auto filesMember = structNode.getMember("files");
+       auto fileStruct = filesMember.getValue().getArray().getValue(0).getStruct();
+       fileHandle.path = fileStruct.getMember("path").getValue().getAsS();
+       std::cerr << "FilePath is " << fileHandle.path << std::endl;
+     } else if (status == "error") {
+       fileHandle.success = false;
+     } else {
+       // [TODO] Be wise here.
+       std::this_thread::sleep_for(std::chrono::microseconds(100000));
+       continue;
+     }
+     break;
     }
-  } catch (...) {};
-  this->fileHandle = nullptr;
-  pthread_mutex_unlock(&globalLock);
-#endif
+  } catch (...) { std::cerr << "waautena " << std::endl; };
   return fileHandle;
 }
 

src/manager.cpp

@@ -127,7 +127,7 @@ bool Manager::parseOpdsDom(const pugi::xml_document& doc, const std::string& url
 
        if (rel == "http://opds-spec.org/image/thumbnail") {
          auto faviconUrl = urlHost + linkNode.attribute("href").value();
-         auto downloader = Downloader();
+         Downloader downloader;
          auto fileHandle = downloader.download(faviconUrl);
          if (fileHandle.success) {
            auto content = getFileContent(fileHandle.path);