feat(python-sdk): move template build-context uploads onto pyqwest

build_api.upload_file uses a one-off pyqwest transport; Content-Length
framing verified at the wire level for both the spooled sync archive and
the async-iterator body (S3 rejects chunked encoding). The upload-file
regression tests compare header names case-insensitively since hyper
lowercases them.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: mishushakov

.changeset/python-pyqwest-template-uploads.md

@@ -0,0 +1,11 @@
+---
+"@e2b/python-sdk": minor
+---
+
+Move template build-context uploads (to S3 presigned URLs) onto
+[`pyqwest`](https://pypi.org/project/pyqwest/) via its httpx-compatible
+transport adapter. Content-Length framing for the streamed archive body is
+preserved (S3 rejects chunked transfer encoding). The 1-hour upload timeout
+now bounds the entire upload rather than each socket operation, and
+`verify_ssl=False` on the client is no longer honored for uploads (pyqwest
+has no insecure-TLS option).

packages/python-sdk/e2b/template_async/build_api.py

@@ -4,8 +4,10 @@
 from typing import Callable, Optional, List, Union
 
 import httpx
+from pyqwest import HTTPTransport
 
-from e2b.api import handle_api_exception
+from e2b.api import handle_api_exception, proxy_to_url
+from e2b.api.client_async import AsyncApiPyqwestTransport
 from e2b.io_utils import aiter_io_chunks
 from e2b.api.client.api.templates import (
     post_v3_templates,
@@ -125,16 +127,23 @@ async def upload_file(
         try:
             size = os.fstat(tar_file.fileno()).st_size
 
+            # Through the pyqwest adapter the upload timeout is a
+            # whole-request deadline for the entire transfer, not a per-write
+            # bound as with the httpx transport this replaced.
             async with httpx.AsyncClient(
                 timeout=httpx.Timeout(upload_timeout),
-                verify=api_client._verify_ssl,
                 follow_redirects=api_client._follow_redirects,
-                proxy=getattr(api_client, "_proxy", None),
-                http2=False,
+                transport=AsyncApiPyqwestTransport(
+                    HTTPTransport(
+                        tls_include_system_certs=True,
+                        proxy=proxy_to_url(getattr(api_client, "_proxy", None)),
+                    )
+                ),
             ) as client:
                 # Stream the archive from disk via an async iterator. The
                 # explicit Content-Length suppresses chunked transfer
-                # encoding, which S3 presigned URLs reject.
+                # encoding, which S3 presigned URLs reject; reqwest keeps the
+                # Content-Length framing for the streamed body.
                 response = await client.put(
                     url,
                     content=aiter_io_chunks(tar_file),

packages/python-sdk/e2b/template_sync/build_api.py

@@ -3,8 +3,10 @@
 from typing import Callable, Optional, List, Union
 
 import httpx
+from pyqwest import SyncHTTPTransport
 
-from e2b.api import handle_api_exception
+from e2b.api import handle_api_exception, proxy_to_url
+from e2b.api.client_sync import ApiPyqwestTransport
 from e2b.api.client.api.templates import (
     post_v3_templates,
     get_templates_template_id_files_hash,
@@ -121,16 +123,23 @@ def upload_file(
             file_name, context_path, ignore_patterns, resolve_symlinks, gzip
         )
         try:
+            # Through the pyqwest adapter the upload timeout is a
+            # whole-request deadline for the entire transfer, not a per-write
+            # bound as with the httpx transport this replaced.
             with httpx.Client(
                 timeout=httpx.Timeout(upload_timeout),
-                verify=api_client._verify_ssl,
                 follow_redirects=api_client._follow_redirects,
-                proxy=getattr(api_client, "_proxy", None),
-                http2=False,
+                transport=ApiPyqwestTransport(
+                    SyncHTTPTransport(
+                        tls_include_system_certs=True,
+                        proxy=proxy_to_url(getattr(api_client, "_proxy", None)),
+                    )
+                ),
             ) as client:
                 # httpx streams the archive from disk in chunks and sets
                 # Content-Length from the file size—S3 presigned URLs reject
-                # chunked transfer encoding.
+                # chunked transfer encoding, and reqwest keeps the
+                # Content-Length framing for the streamed body.
                 response = client.put(url, content=tar_file)
             response.raise_for_status()
         finally:

packages/python-sdk/tests/async/template_async/test_upload_file.py

@@ -26,7 +26,9 @@ def _make_server():
 
     class Handler(BaseHTTPRequestHandler):
         def do_PUT(self):
-            state["headers"] = dict(self.headers)
+            # hyper (pyqwest) sends lowercase header names where httpcore
+            # title-cased them; compare case-insensitively.
+            state["headers"] = {k.lower(): v for k, v in self.headers.items()}
             length = int(self.headers.get("Content-Length", 0))
             body = self.rfile.read(length) if length else b""
             state["body_length"] = len(body)
@@ -72,15 +74,15 @@ def get_async_httpx_client(self):
         thread.join(timeout=5)
 
     assert state["headers"] is not None
-    content_length = state["headers"].get("Content-Length")
+    content_length = state["headers"].get("content-length")
     assert content_length is not None
     assert int(content_length) > 0
     assert int(content_length) == state["body_length"]
 
-    transfer_encoding = state["headers"].get("Transfer-Encoding")
+    transfer_encoding = state["headers"].get("transfer-encoding")
     if transfer_encoding is not None:
         assert "chunked" not in transfer_encoding.lower()
-    assert "Authorization" not in state["headers"]
+    assert "authorization" not in state["headers"]
 
 
 async def _capture_upload_timeout(tmp_path, request_timeout=None):

packages/python-sdk/tests/sync/template_sync/test_upload_file.py

@@ -22,7 +22,9 @@ def _make_server():
 
     class Handler(BaseHTTPRequestHandler):
         def do_PUT(self):
-            state["headers"] = dict(self.headers)
+            # hyper (pyqwest) sends lowercase header names where httpcore
+            # title-cased them; compare case-insensitively.
+            state["headers"] = {k.lower(): v for k, v in self.headers.items()}
             length = int(self.headers.get("Content-Length", 0))
             body = self.rfile.read(length) if length else b""
             state["body_length"] = len(body)
@@ -68,15 +70,15 @@ def get_httpx_client(self):
         thread.join(timeout=5)
 
     assert state["headers"] is not None
-    content_length = state["headers"].get("Content-Length")
+    content_length = state["headers"].get("content-length")
     assert content_length is not None
     assert int(content_length) > 0
     assert int(content_length) == state["body_length"]
 
-    transfer_encoding = state["headers"].get("Transfer-Encoding")
+    transfer_encoding = state["headers"].get("transfer-encoding")
     if transfer_encoding is not None:
         assert "chunked" not in transfer_encoding.lower()
-    assert "Authorization" not in state["headers"]
+    assert "authorization" not in state["headers"]
 
 
 def _capture_upload_timeout(tmp_path, request_timeout=None):