mirror of
https://github.com/frappe/gunicorn.git
synced 2026-07-01 18:21:30 +08:00
0885005b08
- Fix path expectation in test_scope_path_preserved (router strips /http prefix) - Fix lifespan state check to use scope_state instead of module_state - Add tolerance for partial failures in proxy concurrent test - Add retry logic with proper assertions in HTTPS proxy FastAPI test
478 lines
16 KiB
Python
478 lines
16 KiB
Python
#
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# This file is part of gunicorn released under the MIT license.
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# See the NOTICE for more information.
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"""
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ASGI streaming response tests.
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Tests for chunked transfer encoding, Server-Sent Events (SSE),
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and streaming response handling.
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"""
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import asyncio
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from unittest import mock
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import pytest
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from gunicorn.config import Config
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# ============================================================================
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# Chunked Transfer Encoding Tests
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# ============================================================================
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class TestChunkedTransferEncoding:
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"""Tests for HTTP/1.1 chunked transfer encoding."""
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def test_chunked_encoding_format(self):
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"""Test chunked encoding format: size in hex + CRLF + data + CRLF."""
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body = b"Hello"
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chunk = f"{len(body):x}\r\n".encode("latin-1") + body + b"\r\n"
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assert chunk == b"5\r\nHello\r\n"
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def test_chunked_encoding_large_chunk(self):
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"""Test chunked encoding with larger data."""
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body = b"x" * 1000
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chunk = f"{len(body):x}\r\n".encode("latin-1") + body + b"\r\n"
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# 1000 in hex is 3e8
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assert chunk.startswith(b"3e8\r\n")
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assert chunk.endswith(b"\r\n")
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def test_chunked_encoding_terminal_chunk(self):
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"""Test terminal chunk (zero-length)."""
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terminal = b"0\r\n\r\n"
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# Parse it
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assert terminal == b"0\r\n\r\n"
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def test_chunked_encoding_empty_chunk(self):
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"""Test encoding empty body chunk."""
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body = b""
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chunk = f"{len(body):x}\r\n".encode("latin-1") + body + b"\r\n"
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assert chunk == b"0\r\n\r\n"
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def test_chunked_encoding_multiple_chunks(self):
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"""Test multiple chunks in sequence."""
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chunks = []
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# First chunk
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body1 = b"Hello, "
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chunks.append(f"{len(body1):x}\r\n".encode() + body1 + b"\r\n")
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# Second chunk
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body2 = b"World!"
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chunks.append(f"{len(body2):x}\r\n".encode() + body2 + b"\r\n")
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# Terminal chunk
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chunks.append(b"0\r\n\r\n")
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full_response = b"".join(chunks)
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assert b"7\r\nHello, \r\n" in full_response
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assert b"6\r\nWorld!\r\n" in full_response
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assert full_response.endswith(b"0\r\n\r\n")
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# ============================================================================
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# ASGI Streaming Response Tests
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# ============================================================================
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class TestASGIStreamingResponse:
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"""Tests for ASGI streaming response handling."""
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def test_streaming_response_more_body_true(self):
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"""Test streaming response with more_body=True."""
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messages = [
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{
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"type": "http.response.body",
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"body": b"chunk1",
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"more_body": True,
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},
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{
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"type": "http.response.body",
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"body": b"chunk2",
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"more_body": True,
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},
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{
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"type": "http.response.body",
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"body": b"chunk3",
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"more_body": False,
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},
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]
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assert messages[0]["more_body"] is True
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assert messages[1]["more_body"] is True
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assert messages[2]["more_body"] is False
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def test_streaming_response_empty_final_chunk(self):
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"""Test streaming response with empty final chunk."""
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final_message = {
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"type": "http.response.body",
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"body": b"",
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"more_body": False,
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}
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assert final_message["body"] == b""
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assert final_message["more_body"] is False
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def test_response_start_without_content_length(self):
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"""Test response start without Content-Length triggers chunked encoding."""
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# When Content-Length is missing, HTTP/1.1 should use chunked encoding
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message = {
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"type": "http.response.start",
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"status": 200,
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"headers": [
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(b"content-type", b"text/plain"),
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# No content-length header
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],
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}
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# Check no content-length in headers
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header_names = [name.lower() for name, _ in message["headers"]]
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assert b"content-length" not in header_names
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# ============================================================================
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# Server-Sent Events (SSE) Format Tests
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# ============================================================================
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class TestSSEFormat:
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"""Tests for Server-Sent Events format."""
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def test_sse_data_event(self):
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"""Test SSE data event format."""
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data = "Hello, SSE!"
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event = f"data: {data}\n\n"
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assert event == "data: Hello, SSE!\n\n"
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def test_sse_named_event(self):
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"""Test SSE named event format."""
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event_name = "message"
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data = "Hello"
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event = f"event: {event_name}\ndata: {data}\n\n"
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assert "event: message\n" in event
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assert "data: Hello\n" in event
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assert event.endswith("\n\n")
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def test_sse_event_with_id(self):
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"""Test SSE event with ID."""
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event_id = "12345"
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data = "Some data"
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event = f"id: {event_id}\ndata: {data}\n\n"
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assert "id: 12345\n" in event
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def test_sse_multiline_data(self):
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"""Test SSE multiline data."""
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lines = ["line1", "line2", "line3"]
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data_lines = "\n".join(f"data: {line}" for line in lines)
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event = f"{data_lines}\n\n"
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assert event == "data: line1\ndata: line2\ndata: line3\n\n"
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def test_sse_retry_directive(self):
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"""Test SSE retry directive."""
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retry_ms = 3000
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directive = f"retry: {retry_ms}\n\n"
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assert directive == "retry: 3000\n\n"
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def test_sse_comment(self):
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"""Test SSE comment (keep-alive)."""
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comment = ": keep-alive\n\n"
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assert comment.startswith(":")
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def test_sse_content_type(self):
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"""Test SSE Content-Type header."""
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headers = [
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(b"content-type", b"text/event-stream"),
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(b"cache-control", b"no-cache"),
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(b"connection", b"keep-alive"),
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]
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content_type = dict(headers).get(b"content-type")
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assert content_type == b"text/event-stream"
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# ============================================================================
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# Protocol Send Body Tests
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# ============================================================================
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class TestProtocolSendBody:
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"""Tests for ASGIProtocol._send_body method."""
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def _create_protocol(self):
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"""Create an ASGIProtocol instance for testing."""
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from gunicorn.asgi.protocol import ASGIProtocol
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worker = mock.Mock()
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worker.cfg = Config()
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worker.log = mock.Mock()
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worker.asgi = mock.Mock()
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protocol = ASGIProtocol(worker)
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protocol.transport = mock.Mock()
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return protocol
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@pytest.mark.asyncio
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async def test_send_body_without_chunking(self):
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"""Test sending body without chunked encoding."""
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protocol = self._create_protocol()
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await protocol._send_body(b"Hello, World!", chunked=False)
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protocol.transport.write.assert_called_once_with(b"Hello, World!")
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@pytest.mark.asyncio
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async def test_send_body_with_chunking(self):
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"""Test sending body with chunked encoding."""
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protocol = self._create_protocol()
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await protocol._send_body(b"Hello", chunked=True)
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# Should write: "5\r\nHello\r\n"
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protocol.transport.write.assert_called_once()
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call_arg = protocol.transport.write.call_args[0][0]
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assert call_arg == b"5\r\nHello\r\n"
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@pytest.mark.asyncio
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async def test_send_body_empty_without_chunking(self):
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"""Test sending empty body without chunked encoding."""
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protocol = self._create_protocol()
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await protocol._send_body(b"", chunked=False)
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# Empty body should not write anything
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protocol.transport.write.assert_not_called()
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@pytest.mark.asyncio
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async def test_send_body_empty_with_chunking(self):
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"""Test sending empty body with chunked encoding."""
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protocol = self._create_protocol()
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await protocol._send_body(b"", chunked=True)
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# Empty body should not write (terminal chunk handled separately)
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protocol.transport.write.assert_not_called()
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# ============================================================================
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# Content-Length Detection Tests
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# ============================================================================
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class TestContentLengthDetection:
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"""Tests for Content-Length header detection."""
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def test_has_content_length_bytes(self):
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"""Test detecting Content-Length header (bytes)."""
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headers = [
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(b"content-type", b"text/plain"),
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(b"content-length", b"100"),
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]
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has_cl = any(
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name.lower() == b"content-length"
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for name, _ in headers
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)
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assert has_cl is True
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def test_has_content_length_string(self):
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"""Test detecting Content-Length header (string)."""
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headers = [
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("content-type", "text/plain"),
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("content-length", "100"),
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]
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has_cl = any(
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name.lower() == "content-length"
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for name, _ in headers
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)
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assert has_cl is True
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def test_no_content_length(self):
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"""Test when Content-Length is missing."""
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headers = [
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(b"content-type", b"text/plain"),
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]
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has_cl = any(
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name.lower() == b"content-length"
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for name, _ in headers
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)
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assert has_cl is False
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def test_content_length_case_insensitive(self):
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"""Test Content-Length detection is case-insensitive."""
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headers = [
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(b"Content-Length", b"100"),
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]
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has_cl = any(
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name.lower() == b"content-length"
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for name, _ in headers
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)
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assert has_cl is True
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# ============================================================================
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# HTTP Version Check for Chunked Encoding
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# ============================================================================
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class TestHTTPVersionForChunked:
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"""Tests for HTTP version requirements for chunked encoding."""
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def test_http11_supports_chunked(self):
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"""Test HTTP/1.1 supports chunked encoding."""
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version = (1, 1)
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supports_chunked = version >= (1, 1)
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assert supports_chunked is True
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def test_http10_no_chunked(self):
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"""Test HTTP/1.0 does not support chunked encoding."""
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version = (1, 0)
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supports_chunked = version >= (1, 1)
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assert supports_chunked is False
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def test_http2_no_chunked(self):
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"""Test HTTP/2 doesn't use chunked encoding (uses framing)."""
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# HTTP/2 has its own framing mechanism
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version = (2, 0)
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# Chunked encoding is not used in HTTP/2
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uses_http1_chunked = version[0] == 1 and version >= (1, 1)
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assert uses_http1_chunked is False
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# ============================================================================
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# Streaming Response Message Sequence Tests
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# ============================================================================
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class TestStreamingMessageSequence:
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"""Tests for valid streaming response message sequences."""
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def test_valid_sequence_single_body(self):
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"""Test valid sequence: start -> body (more_body=False)."""
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messages = [
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{"type": "http.response.start", "status": 200, "headers": []},
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{"type": "http.response.body", "body": b"Hello", "more_body": False},
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]
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# First message should be start
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assert messages[0]["type"] == "http.response.start"
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# Last body message should have more_body=False
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assert messages[-1]["type"] == "http.response.body"
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assert messages[-1]["more_body"] is False
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def test_valid_sequence_multiple_bodies(self):
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"""Test valid sequence: start -> body (more=True) -> body (more=False)."""
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messages = [
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{"type": "http.response.start", "status": 200, "headers": []},
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{"type": "http.response.body", "body": b"chunk1", "more_body": True},
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{"type": "http.response.body", "body": b"chunk2", "more_body": True},
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{"type": "http.response.body", "body": b"", "more_body": False},
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]
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# Verify sequence
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assert messages[0]["type"] == "http.response.start"
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assert all(m["more_body"] for m in messages[1:-1])
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assert messages[-1]["more_body"] is False
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def test_valid_sequence_with_informational(self):
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"""Test valid sequence with informational response."""
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messages = [
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{
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"type": "http.response.informational",
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"status": 103,
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"headers": [(b"link", b"</style.css>; rel=preload")],
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},
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{"type": "http.response.start", "status": 200, "headers": []},
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{"type": "http.response.body", "body": b"Hello", "more_body": False},
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]
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# Informational before start is valid
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assert messages[0]["type"] == "http.response.informational"
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assert messages[1]["type"] == "http.response.start"
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# ============================================================================
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# Large Response Tests
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# ============================================================================
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class TestLargeResponses:
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"""Tests for handling large responses."""
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def test_chunk_size_encoding(self):
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"""Test chunk size encoding for various sizes."""
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test_cases = [
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(1, b"1\r\n"),
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(10, b"a\r\n"),
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(15, b"f\r\n"),
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(16, b"10\r\n"),
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(255, b"ff\r\n"),
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(256, b"100\r\n"),
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(1024, b"400\r\n"),
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(65535, b"ffff\r\n"),
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(1048576, b"100000\r\n"), # 1MB
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]
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for size, expected in test_cases:
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chunk_header = f"{size:x}\r\n".encode("latin-1")
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assert chunk_header == expected, f"Failed for size {size}"
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def test_megabyte_chunk(self):
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"""Test encoding 1MB chunk."""
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size = 1024 * 1024 # 1MB
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body = b"x" * size
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chunk = f"{len(body):x}\r\n".encode("latin-1") + body + b"\r\n"
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# Verify structure
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assert chunk.startswith(b"100000\r\n") # 1MB in hex
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assert chunk.endswith(b"\r\n")
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# Total size: header (8) + body (1048576) + trailer (2)
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assert len(chunk) == 8 + 1048576 + 2
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# ============================================================================
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# Transfer-Encoding Header Tests
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# ============================================================================
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class TestTransferEncodingHeader:
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"""Tests for Transfer-Encoding header handling."""
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def test_transfer_encoding_chunked(self):
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"""Test Transfer-Encoding: chunked header."""
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headers = [(b"transfer-encoding", b"chunked")]
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te_header = dict(headers).get(b"transfer-encoding")
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assert te_header == b"chunked"
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def test_add_transfer_encoding_to_headers(self):
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"""Test adding Transfer-Encoding header to response."""
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headers = [
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(b"content-type", b"text/plain"),
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]
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# Add chunked encoding
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headers = list(headers) + [(b"transfer-encoding", b"chunked")]
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header_names = [name for name, _ in headers]
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assert b"transfer-encoding" in header_names
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def test_no_content_length_with_transfer_encoding(self):
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"""Test Content-Length should not be present with Transfer-Encoding."""
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# Per HTTP spec, Content-Length must be ignored if Transfer-Encoding present
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headers = [
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(b"content-type", b"text/plain"),
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(b"transfer-encoding", b"chunked"),
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]
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header_names = [name for name, _ in headers]
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assert b"content-length" not in header_names
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