Merge branch 'main' into binary_subscr

Lib/_pyio.py

@@ -1692,13 +1692,14 @@ def readall(self):
 
         return bytes(result)
 
-    def readinto(self, b):
+    def readinto(self, buffer):
         """Same as RawIOBase.readinto()."""
-        m = memoryview(b).cast('B')
-        data = self.read(len(m))
-        n = len(data)
-        m[:n] = data
-        return n
+        self._checkClosed()
+        self._checkReadable()
+        try:
+            return os.readinto(self._fd, buffer)
+        except BlockingIOError:
+            return None
 
     def write(self, b):
         """Write bytes b to file, return number written.

Lib/http/__init__.py

@@ -190,7 +190,7 @@ class HTTPMethod:
 
     Methods from the following RFCs are all observed:
 
-        * RFF 9110: HTTP Semantics, obsoletes 7231, which obsoleted 2616
+        * RFC 9110: HTTP Semantics, obsoletes 7231, which obsoleted 2616
         * RFC 5789: PATCH Method for HTTP
     """
     def __new__(cls, value, description):

Lib/http/client.py

@@ -472,7 +472,7 @@ def read(self, amt=None):
         if self.chunked:
             return self._read_chunked(amt)
 
-        if amt is not None:
+        if amt is not None and amt >= 0:
             if self.length is not None and amt > self.length:
                 # clip the read to the "end of response"
                 amt = self.length
@@ -590,6 +590,8 @@ def _get_chunk_left(self):
 
     def _read_chunked(self, amt=None):
         assert self.chunked != _UNKNOWN
+        if amt is not None and amt < 0:
+            amt = None
         value = []
         try:
             while (chunk_left := self._get_chunk_left()) is not None:

Lib/test/test_httplib.py

@@ -1092,6 +1092,25 @@ def test_chunked(self):
         self.assertEqual(resp.read(), expected)
         resp.close()
 
+        # Explicit full read
+        for n in (-123, -1, None):
+            with self.subTest('full read', n=n):
+                sock = FakeSocket(chunked_start + last_chunk + chunked_end)
+                resp = client.HTTPResponse(sock, method="GET")
+                resp.begin()
+                self.assertTrue(resp.chunked)
+                self.assertEqual(resp.read(n), expected)
+                resp.close()
+
+        # Read first chunk
+        with self.subTest('read1(-1)'):
+            sock = FakeSocket(chunked_start + last_chunk + chunked_end)
+            resp = client.HTTPResponse(sock, method="GET")
+            resp.begin()
+            self.assertTrue(resp.chunked)
+            self.assertEqual(resp.read1(-1), b"hello worl")
+            resp.close()
+
         # Various read sizes
         for n in range(1, 12):
             sock = FakeSocket(chunked_start + last_chunk + chunked_end)

Misc/NEWS.d/next/Library/2024-12-26-11-00-03.gh-issue-112064.mCcw3B.rst

@@ -0,0 +1,2 @@
+Fix incorrect handling of negative read sizes in :meth:`HTTPResponse.read
+<http.client.HTTPResponse.read>`. Patch by Yury Manushkin.

Misc/NEWS.d/next/Library/2025-01-26-10-01-21.gh-issue-129005.ncpLvw.rst

@@ -0,0 +1 @@
+Optimize ``_pyio.FileIO.readinto`` by avoiding unnecessary objects and copies using :func:`os.readinto`.