fix: raise git http body cap

bot_bottle/git_http_backend.py

@@ -19,8 +19,8 @@ from urllib.parse import urlsplit
 
 DEFAULT_PORT = 9420
 
-# Body-size cap matching supervise_server.py's 1 MiB limit.
-MAX_BODY_BYTES = 1 * 1024 * 1024
+# Bound memory use while still allowing ordinary git push packfiles.
+MAX_BODY_BYTES = 100 * 1024 * 1024
 
 
 class GitHttpHandler(BaseHTTPRequestHandler):

docs/prds/0041-git-http-request-bounds.md

@@ -13,13 +13,13 @@ Add Content-Length validation and a body-size cap to `git_http_backend.py` so ma
 
 `bot_bottle/git_http_backend.py` calls `int(self.headers.get("Content-Length", 0))` without catching `ValueError`. A request with a non-numeric Content-Length raises an unhandled exception in the request handler.
 
-The handler reads the full declared length into memory before passing the body to `git http-backend` with no upper bound. A local or compromised client can force arbitrarily high memory use. For comparison, `supervise_server.py` caps request bodies at 1 MiB.
+The handler reads the full declared length into memory before passing the body to `git http-backend` with no upper bound. A local or compromised client can force arbitrarily high memory use.
 
 ## Goals / Success Criteria
 
 - A missing or non-numeric Content-Length returns HTTP 400.
 - A negative Content-Length returns HTTP 400.
-- A body larger than the cap (1 MiB, matching `supervise_server.py`) returns HTTP 413.
+- A body larger than the cap (100 MiB) returns HTTP 413.
 - Valid Git smart-HTTP pushes and fetches continue to work.
 - Unit tests cover: missing length, non-numeric length, negative length, over-cap length, and a valid push/fetch passthrough.
 
@@ -43,12 +43,12 @@ Out of scope:
 
 ## Design
 
-Wrap the Content-Length parse in a try/except and return 400 on `ValueError`. Add an explicit check for negative values. After parsing, compare the declared length against a module-level `MAX_BODY_BYTES` constant (default 1 MiB) and return 413 if exceeded. Read exactly `min(content_length, MAX_BODY_BYTES)` bytes.
+Wrap the Content-Length parse in a try/except and return 400 on `ValueError`. Add an explicit check for negative values. After parsing, compare the declared length against a module-level `MAX_BODY_BYTES` constant (default 100 MiB) and return 413 if exceeded. Read exactly `min(content_length, MAX_BODY_BYTES)` bytes.
 
 ## Testing Strategy
 
 - Unit tests using `unittest.mock` to drive the handler with crafted headers.
-- Test cases: no Content-Length header, `Content-Length: abc`, `Content-Length: -1`, `Content-Length: 2097152` (over cap), and a normal small POST body.
+- Test cases: no Content-Length header, `Content-Length: abc`, `Content-Length: -1`, a declared length above `MAX_BODY_BYTES`, and a normal small POST body.
 
 Run:
 

tests/unit/test_git_http_backend.py

@@ -9,7 +9,7 @@ import urllib.request
 from pathlib import Path
 from unittest import mock
 
-from bot_bottle.git_http_backend import GitHttpHandler
+from bot_bottle.git_http_backend import GitHttpHandler, MAX_BODY_BYTES
 
 
 class TestGitHttpBackend(unittest.TestCase):
@@ -305,9 +305,8 @@ class TestContentLengthBounds(unittest.TestCase):
         self.assertEqual(400, status)
 
     def test_oversized_content_length_returns_413(self):
-        # Declare 2 MiB — over the 1 MiB cap.
         status = self._post("/repo.git/git-receive-pack",
-                            content_length_header=str(2 * 1024 * 1024))
+                            content_length_header=str(MAX_BODY_BYTES + 1))
         self.assertEqual(413, status)
 
     def test_valid_small_body_passes_through(self):