diff --git a/lib/filelib.php b/lib/filelib.php
index b90f4063db2..bf8a5d957e2 100644
--- a/lib/filelib.php
+++ b/lib/filelib.php
@@ -3759,6 +3759,16 @@ class curl {
                     return $this->error;
                 }
 
+                // If the response body is written to a seekable stream resource, reset the stream pointer to avoid
+                // appending multiple response bodies to the same resource.
+                if (!empty($this->options['CURLOPT_FILE'])) {
+                    $streammetadata = stream_get_meta_data($this->options['CURLOPT_FILE']);
+                    if ($streammetadata['seekable']) {
+                        ftruncate($this->options['CURLOPT_FILE'], 0);
+                        rewind($this->options['CURLOPT_FILE']);
+                    }
+                }
+
                 curl_setopt($curl, CURLOPT_URL, $redirecturl);
                 $ret = curl_exec($curl);
 
diff --git a/lib/tests/filelib_test.php b/lib/tests/filelib_test.php
index 8b2cb5ea182..3c23cdfd51f 100644
--- a/lib/tests/filelib_test.php
+++ b/lib/tests/filelib_test.php
@@ -145,6 +145,9 @@ class core_filelib_testcase extends advanced_testcase {
         $contents = download_file_content("$testurl?redir=2");
         $this->assertSame('done', $contents);
 
+        $contents = download_file_content("$testurl?redir=2&verbose=1");
+        $this->assertSame('done', $contents);
+
         $response = download_file_content("$testurl?redir=2", null, null, true);
         $this->assertInstanceOf('stdClass', $response);
         $this->assertSame('200', $response->status);
@@ -153,6 +156,14 @@ class core_filelib_testcase extends advanced_testcase {
         $this->assertSame('done', $response->results);
         $this->assertSame('', $response->error);
 
+        $response = download_file_content("$testurl?redir=2&verbose=1", null, null, true);
+        $this->assertInstanceOf('stdClass', $response);
+        $this->assertSame('200', $response->status);
+        $this->assertTrue(is_array($response->headers));
+        $this->assertMatchesRegularExpression('|^HTTP/1\.[01] 200 OK$|', rtrim($response->response_code));
+        $this->assertSame('done', $response->results);
+        $this->assertSame('', $response->error);
+
         // Commented out this block if there are performance problems.
         /*
         $contents = download_file_content("$testurl?redir=6");
@@ -327,6 +338,17 @@ class core_filelib_testcase extends advanced_testcase {
         $this->assertSame('done', file_get_contents($tofile));
         @unlink($tofile);
 
+        $curl = new curl();
+        $tofile = "$CFG->tempdir/test.html";
+        @unlink($tofile);
+        $fp = fopen($tofile, 'w');
+        $result = $curl->get("$testurl?redir=1&verbose=1", array(), array('CURLOPT_FILE' => $fp));
+        $this->assertTrue($result);
+        fclose($fp);
+        $this->assertFileExists($tofile);
+        $this->assertSame('done', file_get_contents($tofile));
+        @unlink($tofile);
+
         $curl = new curl();
         $tofile = "$CFG->tempdir/test.html";
         @unlink($tofile);
@@ -335,6 +357,15 @@ class core_filelib_testcase extends advanced_testcase {
         $this->assertFileExists($tofile);
         $this->assertSame('done', file_get_contents($tofile));
         @unlink($tofile);
+
+        $curl = new curl();
+        $tofile = "$CFG->tempdir/test.html";
+        @unlink($tofile);
+        $result = $curl->download_one("$testurl?redir=1&verbose=1", array(), array('filepath' => $tofile));
+        $this->assertTrue($result);
+        $this->assertFileExists($tofile);
+        $this->assertSame('done', file_get_contents($tofile));
+        @unlink($tofile);
     }
 
     /**