diff --git a/.gitignore b/.gitignore
index 282ebe32..69a81a20 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,3 +44,4 @@ compile
 main.log
 main.trs
 test-suite.log
+.vscode/
diff --git a/src/File.cc b/src/File.cc
index a98dca61..753fdcc4 100644
--- a/src/File.cc
+++ b/src/File.cc
@@ -372,6 +372,11 @@ Time File::getModifiedTime()
   return Time(fstat.st_mtime);
 }
 
+std::string File::getExtension() const
+{
+    return name_.substr(name_.find_last_of("."));
+}
+
 std::string File::getCurrentDir()
 {
 #ifdef __MINGW32__
diff --git a/src/File.h b/src/File.h
index 6d304640..85a69a5d 100644
--- a/src/File.h
+++ b/src/File.h
@@ -120,6 +120,8 @@ public:
 
   Time getModifiedTime();
 
+  std::string getExtension() const;
+
   // Returns the current working directory.  If the current working
   // directory cannot be retrieved or its length is larger than 2048,
   // returns ".".
diff --git a/src/ProtocolDetector.cc b/src/ProtocolDetector.cc
index cc7016fc..1e496202 100644
--- a/src/ProtocolDetector.cc
+++ b/src/ProtocolDetector.cc
@@ -46,6 +46,7 @@
 #ifdef ENABLE_BITTORRENT
 #  include "bittorrent_helper.h"
 #endif // ENABLE_BITTORRENT
+#include "DefaultBtProgressInfoFile.h"
 
 namespace aria2 {
 
@@ -107,4 +108,16 @@ bool ProtocolDetector::guessMetalinkFile(const std::string& uri) const
   }
 }
 
+bool ProtocolDetector::guessAria2ControlFile(const std::string& uri) const
+{
+  File control_file(uri);
+  if(!control_file.isFile())
+  {
+      return false;
+  }
+
+  const auto control_file_suffix = DefaultBtProgressInfoFile::getSuffix();
+  return control_file.getExtension() == control_file_suffix;
+}
+
 } // namespace aria2
diff --git a/src/ProtocolDetector.h b/src/ProtocolDetector.h
index 54652cb1..a638eb24 100644
--- a/src/ProtocolDetector.h
+++ b/src/ProtocolDetector.h
@@ -60,6 +60,10 @@ public:
   // Returns true if ProtocolDetector thinks uri is a path of Metalink XML
   // file, otherwise return false.
   bool guessMetalinkFile(const std::string& uri) const;
+
+  // Returns true if ProtocolDetector thinks uri is a path to aria2 control
+  // file, otherwise return false
+  bool guessAria2ControlFile(const std::string& uri) const;
 };
 
 } // namespace aria2
diff --git a/src/download_helper.cc b/src/download_helper.cc
index 6118aa14..ca903f71 100644
--- a/src/download_helper.cc
+++ b/src/download_helper.cc
@@ -445,7 +445,13 @@ public:
         }
       }
     }
+    
 #endif // ENABLE_METALINK
+//TOOD: ifdef of ENABLE aria2
+    else if (!ignoreLocalPath_ && detector_.guessAria2ControlFile(uri))
+    {
+      
+    }
     else {
       if (throwOnError_) {
         throw DL_ABORT_EX(fmt(MSG_UNRECOGNIZED_URI, uri.c_str()));
diff --git a/test/ProtocolDetectorTest.cc b/test/ProtocolDetectorTest.cc
index a2b6c790..3d5d988b 100644
--- a/test/ProtocolDetectorTest.cc
+++ b/test/ProtocolDetectorTest.cc
@@ -14,6 +14,7 @@ class ProtocolDetectorTest : public CppUnit::TestFixture {
   CPPUNIT_TEST(testGuessTorrentFile);
   CPPUNIT_TEST(testGuessTorrentMagnet);
   CPPUNIT_TEST(testGuessMetalinkFile);
+  CPPUNIT_TEST(testGuessAria2ControlFile);
   CPPUNIT_TEST_SUITE_END();
 
 public:
@@ -25,6 +26,7 @@ public:
   void testGuessTorrentFile();
   void testGuessTorrentMagnet();
   void testGuessMetalinkFile();
+  void testGuessAria2ControlFile();
 };
 
 CPPUNIT_TEST_SUITE_REGISTRATION(ProtocolDetectorTest);
@@ -66,4 +68,12 @@ void ProtocolDetectorTest::testGuessMetalinkFile()
   CPPUNIT_ASSERT(!detector.guessMetalinkFile(A2_TEST_DIR "/test.torrent"));
 }
 
+void ProtocolDetectorTest::testGuessAria2ControlFile()
+{
+  const ProtocolDetector detector;
+  CPPUNIT_ASSERT(detector.guessAria2ControlFile(A2_TEST_DIR "/control_file.aria2"));
+  CPPUNIT_ASSERT(!detector.guessAria2ControlFile(A2_TEST_DIR));
+  CPPUNIT_ASSERT(detector.guessAria2ControlFile(A2_TEST_DIR "/control_file.aria"));
+}
+
 } // namespace aria2