Add option for passing arguments to single-file command (#691)

* Promoting singlefile timeout to env variable

* Promoting singlefile timeout to env variable

* add tests

* Add LD_SINGLEFILE_OPTIONS support

* add tests

---------

Co-authored-by: Sascha Ißbrücker <sascha.issbruecker@gmail.com>

bookmarks/services/singlefile.py

@@ -1,6 +1,7 @@
 import gzip
 import logging
 import os
+import shlex
 import shutil
 import signal
 import subprocess
@@ -17,10 +18,11 @@ logger = logging.getLogger(__name__)
 
 def create_snapshot(url: str, filepath: str):
     singlefile_path = settings.LD_SINGLEFILE_PATH
-    # singlefile_options = settings.LD_SINGLEFILE_OPTIONS
+    # parse string to list of arguments
+    singlefile_options = shlex.split(settings.LD_SINGLEFILE_OPTIONS)
     temp_filepath = filepath + ".tmp"
-
-    args = [singlefile_path, url, temp_filepath]
+    # concat lists
+    args = [singlefile_path] + singlefile_options + [url, temp_filepath]
     try:
         # Use start_new_session=True to create a new process group
         process = subprocess.Popen(args, start_new_session=True)

bookmarks/tests/test_singlefile_service.py

@@ -51,6 +51,44 @@ class SingleFileServiceTestCase(TestCase):
             with self.assertRaises(singlefile.SingeFileError):
                 singlefile.create_snapshot("http://example.com", self.html_filepath)
 
+    def test_create_snapshot_empty_options(self):
+        mock_process = mock.Mock()
+        mock_process.wait.return_value = 0
+        self.create_test_file()
+
+        with mock.patch("subprocess.Popen") as mock_popen:
+            singlefile.create_snapshot("http://example.com", self.html_filepath)
+
+            expected_args = [
+                "single-file",
+                "http://example.com",
+                self.html_filepath + ".tmp",
+            ]
+            mock_popen.assert_called_with(expected_args, start_new_session=True)
+
+    @override_settings(
+        LD_SINGLEFILE_OPTIONS='--some-option "some value" --another-option "another value" --third-option="third value"'
+    )
+    def test_create_snapshot_custom_options(self):
+        mock_process = mock.Mock()
+        mock_process.wait.return_value = 0
+        self.create_test_file()
+
+        with mock.patch("subprocess.Popen") as mock_popen:
+            singlefile.create_snapshot("http://example.com", self.html_filepath)
+
+            expected_args = [
+                "single-file",
+                "--some-option",
+                "some value",
+                "--another-option",
+                "another value",
+                "--third-option=third value",
+                "http://example.com",
+                self.html_filepath + ".tmp",
+            ]
+            mock_popen.assert_called_with(expected_args, start_new_session=True)
+
     def test_create_snapshot_default_timeout_setting(self):
         mock_process = mock.Mock()
         mock_process.wait.return_value = 0

docs/Options.md

@@ -252,4 +252,14 @@ Alternative favicon providers:
 
 Values: `Float` | Default =  60.0
 
-When creating archive snapshots, control the timeout for how long to wait for `single-file` to complete, in `seconds`. Defaults to 60 seconds; on lower-powered hardware you may need to increase this value. 
+When creating HTML archive snapshots, control the timeout for how long to wait for the snapshot to complete, in `seconds`.
+Defaults to 60 seconds; on lower-powered hardware you may need to increase this value. 
+
+### `LD_SINGLEFILE_OPTIONS`
+
+Values: `String` | Default = None
+
+When creating HTML archive snapshots, pass additional options to the `single-file` application that is used to create snapshots.
+See `single-file --help` for complete list of arguments, or browse source: https://github.com/gildas-lormeau/single-file-cli/blob/master/options.js
+
+Example: `LD_SINGLEFILE_OPTIONS=--user-agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:124.0) Gecko/20100101 Firefox/124.0"`