temp file wrapper

yt_dlp/jsinterp/external.py

@@ -47,39 +47,45 @@ def cookie_jar_to_list(cookie_jar):
     return [cookie_to_dict(cookie) for cookie in cookie_jar]
 
 
-@contextlib.contextmanager
-def _temp_file(content, *, mode='wt', encoding='utf-8', suffix=None, close=True):
-    if 'b' in mode:
-        encoding = None
-    temp_file_handle = tempfile.NamedTemporaryFile(mode, encoding=encoding, suffix=suffix, delete=False)
-    try:
-        temp_file_handle.write(content)
-        if close:
-            temp_file_handle.close()
-        yield temp_file_handle
-    finally:
+class TempFileWrapper:
+    def __init__(self, content=None, text=True, encoding='utf-8', suffix=None):
+        self.encoding = None if not text else encoding
+        self.text = text
+        self._file = tempfile.NamedTemporaryFile('wb', suffix=suffix, delete=False)
+        self._file.close()
+        if content:
+            self.write(content)
+
+    @property
+    def name(self):
+        return self._file.name
+
+    @contextlib.contextmanager
+    def opened_file(self, mode, *, seek=None, seek_whence=0):
+        mode = mode if (self.text or 'b' in mode) else mode + 'b'
+        with open(self._file.name, mode, encoding=self.encoding) as f:
+            if seek is not None:
+                self._file.seek(seek, seek_whence)
+            yield f
+
+    def write(self, s, seek=None, seek_whence=0):
+        with self.opened_file('w', seek=seek, seek_whence=seek_whence) as f:
+            f.write(s)
+
+    def append_write(self, s, seek=None, seek_whence=0):
+        with self.opened_file('a', seek=seek, seek_whence=seek_whence) as f:
+            f.write(s)
+
+    def read(self, n=-1, seek=None, seek_whence=0):
+        with self.opened_file('r', seek=seek, seek_whence=seek_whence) as f:
+            return f.read(n)
+
+    def cleanup(self):
         with contextlib.suppress(OSError):
-            os.remove(temp_file_handle.name)
+            os.remove(self._file.name)
 
-
-@contextlib.contextmanager
-def _tempfile_context():
-    handles = []
-
-    def _creater(content, *, mode='wt', encoding='utf-8', suffix=None, close=True):
-        encoding = None if 'b' in mode else encoding
-        handle = tempfile.NamedTemporaryFile(mode, encoding=encoding, suffix=suffix, delete=False)
-        handles.append(handle)
-        handle.write(content)
-        if close:
-            handle.close()
-        return handle
-    try:
-        yield _creater
-    finally:
-        for handle in handles:
-            with contextlib.suppress(OSError):
-                os.remove(handle.name)
+    def __del__(self):
+        self.cleanup()
 
 
 class ExternalJSI:
@@ -117,20 +123,20 @@ def __init__(self, extractor: InfoExtractor, required_version=None, timeout=1000
 
     @classmethod
     def _execute(cls, jscode, extractor=None, video_id=None, note='', flags=[], timeout=10000):
-        with _temp_file(jscode, suffix='.js') as js_file:
-            if note and extractor:
-                extractor.to_screen(f'{format_field(video_id, None, "%s: ")}{note}')
-            cmd = [cls.exe, 'run', *flags, js_file.name]
-            try:
-                stdout, stderr, returncode = Popen.run(
-                    cmd, timeout=timeout / 1000, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-            except Exception as e:
-                raise ExtractorError('Unable to run Deno binary', cause=e)
-            if returncode:
-                raise ExtractorError(f'Failed with returncode {returncode}:\n{stderr}')
-            elif stderr and extractor:
-                extractor.report_warning(f'JS console error msg:\n{stderr.strip()}', video_id=video_id)
-            return stdout.strip()
+        js_file = TempFileWrapper(jscode)
+        if note and extractor:
+            extractor.to_screen(f'{format_field(video_id, None, "%s: ")}{note}')
+        cmd = [cls.exe, 'run', *flags, js_file.name]
+        try:
+            stdout, stderr, returncode = Popen.run(
+                cmd, timeout=timeout / 1000, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        except Exception as e:
+            raise ExtractorError('Unable to run Deno binary', cause=e)
+        if returncode:
+            raise ExtractorError(f'Failed with returncode {returncode}:\n{stderr}')
+        elif stderr and extractor:
+            extractor.report_warning(f'JS console error msg:\n{stderr.strip()}', video_id=video_id)
+        return stdout.strip()
 
     def execute(self, jscode, video_id=None, *, note='Executing JS in Deno', flags=[], base_js=None):
         """Execute JS directly in Deno runtime and return stdout"""