plamut: Unit tests suite fails under Python 3.4, created an issue (https://github.com/googleapis/google-resumable-media-python/issues/117). The 3.4 tests pass, though, if ran in isolation.
anantzoid: I've been facing `ReadTimeout` issues while reading the data from GCS and noticed `_DEFAULT_READ_TIMEOUT = 60` cannot be changed by the user for read requests [[src](https://github.com/googleapis/google-resumable-media-python/blob/master/google/resumable_media/requests/_helpers.py#L34)].

The user should be able to specify timeout while using [`download_to_file`](https://googleapis.dev/python/storage/latest/blobs.html).
plamut: @busunkim96 Somehow this slipped out of the focus, and it might be a good time to revive it. Added you as a reviewer based on the GitHub's suggestion, but feel free to delegate to someone else if that makes more sense, thanks!

@anantzoid Thanks for bringing this back to attention. As this PR only adds configurable timeouts to uploads, I can add the same for the download methods, too, provided that the original [feature request](https://github.com/googleapis/google-resumable-media-python/issues/45) is confirmed (I personally don't see any reason why it shouldn't be).
busunkim96: LGTM'd, but adding @crwilcox since the storage folks are other primary users of this library
plamut: I will update the PR with timeouts to the download methods as well.
plamut: @crwilcox Friendly ping, can you take a look? Thanks!
diff --git a/google/resumable_media/_download.py b/google/resumable_media/_download.py
index 5d2d10d..d775c21 100644
--- a/google/resumable_media/_download.py
+++ b/google/resumable_media/_download.py
@@ -171,7 +171,7 @@ class Download(DownloadBase):
             response, _ACCEPTABLE_STATUS_CODES, self._get_status_code
         )
 
-    def consume(self, transport):
+    def consume(self, transport, timeout=None):
         """Consume the resource to be downloaded.
 
         If a ``stream`` is attached to this download, then the downloaded
@@ -180,6 +180,13 @@ class Download(DownloadBase):
         Args:
             transport (object): An object which can make authenticated
                 requests.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Raises:
             NotImplementedError: Always, since virtual.
@@ -398,12 +405,19 @@ class ChunkedDownload(DownloadBase):
         # Write the response body to the stream.
         self._stream.write(response_body)
 
-    def consume_next_chunk(self, transport):
+    def consume_next_chunk(self, transport, timeout=None):
         """Consume the next chunk of the resource to be downloaded.
 
         Args:
             transport (object): An object which can make authenticated
                 requests.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Raises:
             NotImplementedError: Always, since virtual.
diff --git a/google/resumable_media/_upload.py b/google/resumable_media/_upload.py
index dd5aaed..de7c697 100644
--- a/google/resumable_media/_upload.py
+++ b/google/resumable_media/_upload.py
@@ -198,7 +198,7 @@ class SimpleUpload(UploadBase):
         self._headers[_CONTENT_TYPE_HEADER] = content_type
         return _POST, self.upload_url, data, self._headers
 
-    def transmit(self, transport, data, content_type):
+    def transmit(self, transport, data, content_type, timeout=None):
         """Transmit the resource to be uploaded.
 
         Args:
@@ -207,6 +207,13 @@ class SimpleUpload(UploadBase):
             data (bytes): The resource content to be uploaded.
             content_type (str): The content type of the resource, e.g. a JPEG
                 image has content type ``image/jpeg``.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Raises:
             NotImplementedError: Always, since virtual.
@@ -274,7 +281,7 @@ class MultipartUpload(UploadBase):
         self._headers[_CONTENT_TYPE_HEADER] = multipart_content_type
         return _POST, self.upload_url, content, self._headers
 
-    def transmit(self, transport, data, metadata, content_type):
+    def transmit(self, transport, data, metadata, content_type, timeout=None):
         """Transmit the resource to be uploaded.
 
         Args:
@@ -285,6 +292,13 @@ class MultipartUpload(UploadBase):
                 ACL list.
             content_type (str): The content type of the resource, e.g. a JPEG
                 image has content type ``image/jpeg``.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Raises:
             NotImplementedError: Always, since virtual.
@@ -468,6 +482,7 @@ class ResumableUpload(UploadBase):
         content_type,
         total_bytes=None,
         stream_final=True,
+        timeout=None,
     ):
         """Initiate a resumable upload.
 
@@ -499,6 +514,13 @@ class ResumableUpload(UploadBase):
                 "final" (i.e. no more bytes will be added to it). In this case
                 we determine the upload size from the size of the stream. If
                 ``total_bytes`` is passed, this argument will be ignored.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Raises:
             NotImplementedError: Always, since virtual.
@@ -626,7 +648,7 @@ class ResumableUpload(UploadBase):
                 )
             self._bytes_uploaded = int(match.group(u"end_byte")) + 1
 
-    def transmit_next_chunk(self, transport):
+    def transmit_next_chunk(self, transport, timeout=None):
         """Transmit the next chunk of the resource to be uploaded.
 
         If the current upload was initiated with ``stream_final=False``,
@@ -637,6 +659,13 @@ class ResumableUpload(UploadBase):
         Args:
             transport (object): An object which can make authenticated
                 requests.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Raises:
             NotImplementedError: Always, since virtual.
diff --git a/google/resumable_media/requests/download.py b/google/resumable_media/requests/download.py
index 6ebd31e..2933ff6 100644
--- a/google/resumable_media/requests/download.py
+++ b/google/resumable_media/requests/download.py
@@ -119,7 +119,11 @@ class Download(_helpers.RequestsMixin, _download.Download):
             )
             raise common.DataCorruption(response, msg)
 
-    def consume(self, transport):
+    def consume(
+        self,
+        transport,
+        timeout=(_helpers._DEFAULT_CONNECT_TIMEOUT, _helpers._DEFAULT_READ_TIMEOUT),
+    ):
         """Consume the resource to be downloaded.
 
         If a ``stream`` is attached to this download, then the downloaded
@@ -128,6 +132,13 @@ class Download(_helpers.RequestsMixin, _download.Download):
         Args:
             transport (~requests.Session): A ``requests`` object which can
                 make authenticated requests.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Returns:
             ~requests.Response: The HTTP response returned by ``transport``.
@@ -144,6 +155,7 @@ class Download(_helpers.RequestsMixin, _download.Download):
             u"data": payload,
             u"headers": headers,
             u"retry_strategy": self._retry_strategy,
+            u"timeout": timeout,
         }
         if self._stream is not None:
             request_kwargs[u"stream"] = True
@@ -231,7 +243,11 @@ class RawDownload(_helpers.RawRequestsMixin, _download.Download):
             )
             raise common.DataCorruption(response, msg)
 
-    def consume(self, transport):
+    def consume(
+        self,
+        transport,
+        timeout=(_helpers._DEFAULT_CONNECT_TIMEOUT, _helpers._DEFAULT_READ_TIMEOUT),
+    ):
         """Consume the resource to be downloaded.
 
         If a ``stream`` is attached to this download, then the downloaded
@@ -240,6 +256,13 @@ class RawDownload(_helpers.RawRequestsMixin, _download.Download):
         Args:
             transport (~requests.Session): A ``requests`` object which can
                 make authenticated requests.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Returns:
             ~requests.Response: The HTTP response returned by ``transport``.
@@ -260,6 +283,7 @@ class RawDownload(_helpers.RawRequestsMixin, _download.Download):
             headers=headers,
             retry_strategy=self._retry_strategy,
             stream=True,
+            timeout=timeout,
         )
 
         self._process_response(result)
@@ -298,12 +322,23 @@ class ChunkedDownload(_helpers.RequestsMixin, _download.ChunkedDownload):
         ValueError: If ``start`` is negative.
     """
 
-    def consume_next_chunk(self, transport):
+    def consume_next_chunk(
+        self,
+        transport,
+        timeout=(_helpers._DEFAULT_CONNECT_TIMEOUT, _helpers._DEFAULT_READ_TIMEOUT),
+    ):
         """Consume the next chunk of the resource to be downloaded.
 
         Args:
             transport (~requests.Session): A ``requests`` object which can
                 make authenticated requests.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Returns:
             ~requests.Response: The HTTP response returned by ``transport``.
@@ -320,6 +355,7 @@ class ChunkedDownload(_helpers.RequestsMixin, _download.ChunkedDownload):
             data=payload,
             headers=headers,
             retry_strategy=self._retry_strategy,
+            timeout=timeout,
         )
         self._process_response(result)
         return result
@@ -353,12 +389,23 @@ class RawChunkedDownload(_helpers.RawRequestsMixin, _download.ChunkedDownload):
         ValueError: If ``start`` is negative.
     """
 
-    def consume_next_chunk(self, transport):
+    def consume_next_chunk(
+        self,
+        transport,
+        timeout=(_helpers._DEFAULT_CONNECT_TIMEOUT, _helpers._DEFAULT_READ_TIMEOUT),
+    ):
         """Consume the next chunk of the resource to be downloaded.
 
         Args:
             transport (~requests.Session): A ``requests`` object which can
                 make authenticated requests.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Returns:
             ~requests.Response: The HTTP response returned by ``transport``.
@@ -376,6 +423,7 @@ class RawChunkedDownload(_helpers.RawRequestsMixin, _download.ChunkedDownload):
             headers=headers,
             stream=True,
             retry_strategy=self._retry_strategy,
+            timeout=timeout,
         )
         self._process_response(result)
         return result
diff --git a/google/resumable_media/requests/upload.py b/google/resumable_media/requests/upload.py
index f71ecf2..c9d5ef4 100644
--- a/google/resumable_media/requests/upload.py
+++ b/google/resumable_media/requests/upload.py
@@ -38,7 +38,13 @@ class SimpleUpload(_helpers.RequestsMixin, _upload.SimpleUpload):
         upload_url (str): The URL where the content will be uploaded.
     """
 
-    def transmit(self, transport, data, content_type):
+    def transmit(
+        self,
+        transport,
+        data,
+        content_type,
+        timeout=(_helpers._DEFAULT_CONNECT_TIMEOUT, _helpers._DEFAULT_READ_TIMEOUT),
+    ):
         """Transmit the resource to be uploaded.
 
         Args:
@@ -47,6 +53,13 @@ class SimpleUpload(_helpers.RequestsMixin, _upload.SimpleUpload):
             data (bytes): The resource content to be uploaded.
             content_type (str): The content type of the resource, e.g. a JPEG
                 image has content type ``image/jpeg``.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Returns:
             ~requests.Response: The HTTP response returned by ``transport``.
@@ -59,6 +72,7 @@ class SimpleUpload(_helpers.RequestsMixin, _upload.SimpleUpload):
             data=payload,
             headers=headers,
             retry_strategy=self._retry_strategy,
+            timeout=timeout,
         )
         self._process_response(response)
         return response
@@ -79,7 +93,14 @@ class MultipartUpload(_helpers.RequestsMixin, _upload.MultipartUpload):
         upload_url (str): The URL where the content will be uploaded.
     """
 
-    def transmit(self, transport, data, metadata, content_type):
+    def transmit(
+        self,
+        transport,
+        data,
+        metadata,
+        content_type,
+        timeout=(_helpers._DEFAULT_CONNECT_TIMEOUT, _helpers._DEFAULT_READ_TIMEOUT),
+    ):
         """Transmit the resource to be uploaded.
 
         Args:
@@ -90,6 +111,13 @@ class MultipartUpload(_helpers.RequestsMixin, _upload.MultipartUpload):
                 ACL list.
             content_type (str): The content type of the resource, e.g. a JPEG
                 image has content type ``image/jpeg``.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Returns:
             ~requests.Response: The HTTP response returned by ``transport``.
@@ -104,6 +132,7 @@ class MultipartUpload(_helpers.RequestsMixin, _upload.MultipartUpload):
             data=payload,
             headers=headers,
             retry_strategy=self._retry_strategy,
+            timeout=timeout,
         )
         self._process_response(response)
         return response
@@ -300,6 +329,7 @@ class ResumableUpload(_helpers.RequestsMixin, _upload.ResumableUpload):
         content_type,
         total_bytes=None,
         stream_final=True,
+        timeout=(_helpers._DEFAULT_CONNECT_TIMEOUT, _helpers._DEFAULT_READ_TIMEOUT),
     ):
         """Initiate a resumable upload.
 
@@ -331,6 +361,13 @@ class ResumableUpload(_helpers.RequestsMixin, _upload.ResumableUpload):
                 "final" (i.e. no more bytes will be added to it). In this case
                 we determine the upload size from the size of the stream. If
                 ``total_bytes`` is passed, this argument will be ignored.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Returns:
             ~requests.Response: The HTTP response returned by ``transport``.
@@ -349,11 +386,16 @@ class ResumableUpload(_helpers.RequestsMixin, _upload.ResumableUpload):
             data=payload,
             headers=headers,
             retry_strategy=self._retry_strategy,
+            timeout=timeout,
         )
         self._process_initiate_response(response)
         return response
 
-    def transmit_next_chunk(self, transport):
+    def transmit_next_chunk(
+        self,
+        transport,
+        timeout=(_helpers._DEFAULT_CONNECT_TIMEOUT, _helpers._DEFAULT_READ_TIMEOUT),
+    ):
         """Transmit the next chunk of the resource to be uploaded.
 
         If the current upload was initiated with ``stream_final=False``,
@@ -407,6 +449,13 @@ class ResumableUpload(_helpers.RequestsMixin, _upload.ResumableUpload):
         Args:
             transport (~requests.Session): A ``requests`` object which can
                 make authenticated requests.
+            timeout (Optional[Union[float, Tuple[float, float]]]):
+                The number of seconds to wait for the server response.
+                Depending on the retry strategy, a request may be repeated
+                several times using the same timeout each time.
+
+                Can also be passed as a tuple (connect_timeout, read_timeout).
+                See :meth:`requests.Session.request` documentation for details.
 
         Returns:
             ~requests.Response: The HTTP response returned by ``transport``.
@@ -423,6 +472,7 @@ class ResumableUpload(_helpers.RequestsMixin, _upload.ResumableUpload):
             data=payload,
             headers=headers,
             retry_strategy=self._retry_strategy,
+            timeout=timeout,
         )
         self._process_response(response, len(payload))
         return response

Add request timeout
Hi
it seems that our project, which use https://github.com/GoogleCloudPlatform/google-cloud-python/tree/master/storage/google/cloud/storage, is getting stuck during upload.

Although we can't confirm it with absolute certainty, it may be good idea have request timeout in resumable-media anyway.
Questions are:
- do you find a timeout good idea in general?
- should be there some well-chosen conservative implicit timeout by library (or explicit user defined timeout is preferred despite much complicated implementation because this library is only used by other google cloud platform libraries)?

We can provide eg. pull request for default timeout but we rather discuss all first.

diff --git a/tests/unit/requests/test_download.py b/tests/unit/requests/test_download.py
index 971129b..93449b5 100644
--- a/tests/unit/requests/test_download.py
+++ b/tests/unit/requests/test_download.py
@@ -108,7 +108,13 @@ class TestDownload(object):
         )
 
     def _consume_helper(
-        self, stream=None, end=65536, headers=None, chunks=(), response_headers=None
+        self,
+        stream=None,
+        end=65536,
+        headers=None,
+        chunks=(),
+        response_headers=None,
+        timeout=None,
     ):
         download = download_mod.Download(
             EXAMPLE_URL, stream=stream, end=end, headers=headers
@@ -119,16 +125,24 @@ class TestDownload(object):
         )
 
         assert not download.finished
-        ret_val = download.consume(transport)
+
+        if timeout is not None:
+            ret_val = download.consume(transport, timeout=timeout)
+        else:
+            ret_val = download.consume(transport)
+
         assert ret_val is transport.request.return_value
 
-        called_kwargs = {u"data": None, u"headers": download._headers}
+        called_kwargs = {
+            u"data": None,
+            u"headers": download._headers,
+            u"timeout": EXPECTED_TIMEOUT if timeout is None else timeout,
+        }
         if chunks:
             assert stream is not None
             called_kwargs[u"stream"] = True
-        transport.request.assert_called_once_with(
-            u"GET", EXAMPLE_URL, timeout=EXPECTED_TIMEOUT, **called_kwargs
-        )
+
+        transport.request.assert_called_once_with(u"GET", EXAMPLE_URL, **called_kwargs)
 
         range_bytes = u"bytes={:d}-{:d}".format(0, end)
         assert download._headers[u"range"] == range_bytes
@@ -139,6 +153,9 @@ class TestDownload(object):
     def test_consume(self):
         self._consume_helper()
 
+    def test_consume_with_custom_timeout(self):
+        self._consume_helper(timeout=14.7)
+
     def test_consume_with_stream(self):
         stream = io.BytesIO()
         chunks = (b"up down ", b"charlie ", b"brown")
@@ -298,7 +315,13 @@ class TestRawDownload(object):
         )
 
     def _consume_helper(
-        self, stream=None, end=65536, headers=None, chunks=(), response_headers=None
+        self,
+        stream=None,
+        end=65536,
+        headers=None,
+        chunks=(),
+        response_headers=None,
+        timeout=None,
     ):
         download = download_mod.RawDownload(
             EXAMPLE_URL, stream=stream, end=end, headers=headers
@@ -309,7 +332,12 @@ class TestRawDownload(object):
         )
 
         assert not download.finished
-        ret_val = download.consume(transport)
+
+        if timeout is not None:
+            ret_val = download.consume(transport, timeout=timeout)
+        else:
+            ret_val = download.consume(transport)
+
         assert ret_val is transport.request.return_value
 
         if chunks:
@@ -320,7 +348,7 @@ class TestRawDownload(object):
             data=None,
             headers=download._headers,
             stream=True,
-            timeout=EXPECTED_TIMEOUT,
+            timeout=EXPECTED_TIMEOUT if timeout is None else timeout,
         )
 
         range_bytes = u"bytes={:d}-{:d}".format(0, end)
@@ -332,6 +360,9 @@ class TestRawDownload(object):
     def test_consume(self):
         self._consume_helper()
 
+    def test_consume_with_custom_timeout(self):
+        self._consume_helper(timeout=14.7)
+
     def test_consume_with_stream(self):
         stream = io.BytesIO()
         chunks = (b"up down ", b"charlie ", b"brown")
@@ -491,6 +522,26 @@ class TestChunkedDownload(object):
         assert download.bytes_downloaded == chunk_size
         assert download.total_bytes == total_bytes
 
+    def test_consume_next_chunk_with_custom_timeout(self):
+        start = 1536
+        stream = io.BytesIO()
+        data = b"Just one chunk."
+        chunk_size = len(data)
+        download = download_mod.ChunkedDownload(
+            EXAMPLE_URL, chunk_size, stream, start=start
+        )
+        total_bytes = 16384
+        transport = self._mock_transport(start, chunk_size, total_bytes, content=data)
+
+        # Actually consume the chunk and check the output.
+        download.consume_next_chunk(transport, timeout=14.7)
+
+        range_bytes = u"bytes={:d}-{:d}".format(start, start + chunk_size - 1)
+        download_headers = {u"range": range_bytes}
+        transport.request.assert_called_once_with(
+            u"GET", EXAMPLE_URL, data=None, headers=download_headers, timeout=14.7,
+        )
+
 
 class TestRawChunkedDownload(object):
     @staticmethod
@@ -569,6 +620,36 @@ class TestRawChunkedDownload(object):
         assert download.bytes_downloaded == chunk_size
         assert download.total_bytes == total_bytes
 
+    def test_consume_next_chunk_with_custom_timeout(self):
+        start = 1536
+        stream = io.BytesIO()
+        data = b"Just one chunk."
+        chunk_size = len(data)
+        download = download_mod.RawChunkedDownload(
+            EXAMPLE_URL, chunk_size, stream, start=start
+        )
+        total_bytes = 16384
+        transport = self._mock_transport(start, chunk_size, total_bytes, content=data)
+
+        # Actually consume the chunk and check the output.
+        download.consume_next_chunk(transport, timeout=14.7)
+
+        range_bytes = u"bytes={:d}-{:d}".format(start, start + chunk_size - 1)
+        download_headers = {u"range": range_bytes}
+        transport.request.assert_called_once_with(
+            u"GET",
+            EXAMPLE_URL,
+            data=None,
+            headers=download_headers,
+            stream=True,
+            timeout=14.7,
+        )
+        assert stream.getvalue() == data
+        # Go back and check the internal state after consuming the chunk.
+        assert not download.finished
+        assert download.bytes_downloaded == chunk_size
+        assert download.total_bytes == total_bytes
+
 
 class Test__get_expected_md5(object):
     @mock.patch("google.resumable_media.requests.download._LOGGER")
diff --git a/tests/unit/requests/test_upload.py b/tests/unit/requests/test_upload.py
index e062865..56a8246 100644
--- a/tests/unit/requests/test_upload.py
+++ b/tests/unit/requests/test_upload.py
@@ -62,6 +62,20 @@ class TestSimpleUpload(object):
         )
         assert upload.finished
 
+    def test_transmit_w_custom_timeout(self):
+        data = b"I have got a lovely bunch of coconuts."
+        content_type = BASIC_CONTENT
+        upload = upload_mod.SimpleUpload(SIMPLE_URL)
+        transport = mock.Mock(spec=["request"])
+        transport.request.return_value = _make_response()
+
+        upload.transmit(transport, data, content_type, timeout=12.6)
+
+        expected_headers = {u"content-type": content_type}
+        transport.request.assert_called_once_with(
+            u"POST", SIMPLE_URL, data=data, headers=expected_headers, timeout=12.6,
+        )
+
 
 class TestMultipartUpload(object):
     @mock.patch(u"google.resumable_media._upload.get_boundary", return_value=b"==4==")
@@ -100,6 +114,44 @@ class TestMultipartUpload(object):
         assert upload.finished
         mock_get_boundary.assert_called_once_with()
 
+    @mock.patch(u"google.resumable_media._upload.get_boundary", return_value=b"==4==")
+    def test_transmit_w_custom_timeout(self, mock_get_boundary):
+        data = b"Mock data here and there."
+        metadata = {u"Hey": u"You", u"Guys": u"90909"}
+        content_type = BASIC_CONTENT
+        upload = upload_mod.MultipartUpload(MULTIPART_URL)
+        transport = mock.Mock(spec=["request"])
+        transport.request.return_value = _make_response()
+
+        upload.transmit(transport, data, metadata, content_type, timeout=12.6)
+
+        expected_payload = b"".join(
+            (
+                b"--==4==\r\n",
+                JSON_TYPE_LINE,
+                b"\r\n",
+                json.dumps(metadata).encode(u"utf-8"),
+                b"\r\n",
+                b"--==4==\r\n",
+                b"content-type: text/plain\r\n",
+                b"\r\n",
+                b"Mock data here and there.\r\n",
+                b"--==4==--",
+            )
+        )
+        multipart_type = b'multipart/related; boundary="==4=="'
+        upload_headers = {u"content-type": multipart_type}
+
+        transport.request.assert_called_once_with(
+            u"POST",
+            MULTIPART_URL,
+            data=expected_payload,
+            headers=upload_headers,
+            timeout=12.6,
+        )
+        assert upload.finished
+        mock_get_boundary.assert_called_once_with()
+
 
 class TestResumableUpload(object):
     def test_initiate(self):
@@ -144,6 +196,37 @@ class TestResumableUpload(object):
             timeout=EXPECTED_TIMEOUT,
         )
 
+    def test_initiate_w_custom_timeout(self):
+        upload = upload_mod.ResumableUpload(RESUMABLE_URL, ONE_MB)
+        data = b"Knock knock who is there"
+        stream = io.BytesIO(data)
+        metadata = {u"name": u"got-jokes.txt"}
+
+        transport = mock.Mock(spec=["request"])
+        location = (u"http://test.invalid?upload_id=AACODBBBxuw9u3AA",)
+        response_headers = {u"location": location}
+        post_response = _make_response(headers=response_headers)
+        transport.request.return_value = post_response
+
+        upload.initiate(
+            transport, stream, metadata, BASIC_CONTENT, total_bytes=100, timeout=12.6,
+        )
+
+        # Make sure timeout was passed to the transport
+        json_bytes = b'{"name": "got-jokes.txt"}'
+        expected_headers = {
+            u"content-type": JSON_TYPE,
+            u"x-upload-content-type": BASIC_CONTENT,
+            u"x-upload-content-length": u"{:d}".format(100),
+        }
+        transport.request.assert_called_once_with(
+            u"POST",
+            RESUMABLE_URL,
+            data=json_bytes,
+            headers=expected_headers,
+            timeout=12.6,
+        )
+
     @staticmethod
     def _upload_in_flight(data, headers=None):
         upload = upload_mod.ResumableUpload(RESUMABLE_URL, ONE_MB, headers=headers)
@@ -196,6 +279,38 @@ class TestResumableUpload(object):
             timeout=EXPECTED_TIMEOUT,
         )
 
+    def test_transmit_next_chunk_w_custom_timeout(self):
+        data = b"This time the data is official."
+        upload = self._upload_in_flight(data)
+
+        # Make a fake chunk size smaller than 256 KB.
+        chunk_size = 10
+        upload._chunk_size = chunk_size
+
+        # Make a fake 308 response.
+        response_headers = {u"range": u"bytes=0-{:d}".format(chunk_size - 1)}
+        transport = self._chunk_mock(
+            resumable_media.PERMANENT_REDIRECT, response_headers
+        )
+
+        # Make request and check the return value (against the mock).
+        upload.transmit_next_chunk(transport, timeout=12.6)
+
+        # Make sure timeout was passed to the transport
+        payload = data[:chunk_size]
+        content_range = u"bytes 0-{:d}/{:d}".format(chunk_size - 1, len(data))
+        expected_headers = {
+            u"content-range": content_range,
+            u"content-type": BASIC_CONTENT,
+        }
+        transport.request.assert_called_once_with(
+            u"PUT",
+            upload.resumable_url,
+            data=payload,
+            headers=expected_headers,
+            timeout=12.6,
+        )
+
     def test_recover(self):
         upload = upload_mod.ResumableUpload(RESUMABLE_URL, ONE_MB)
         upload._invalid = True  # Make sure invalid.

pip install -e .[requests]
parse_log_pytest_v2
requirements.txt
pytest pytest-cov mock
3.9
pytest -xvs
certifi==2025.1.31
charset-normalizer==3.4.1
coverage==7.8.0
exceptiongroup==1.2.2
-e git+https://github.com/googleapis/google-resumable-media-python.git@063b4f9f3ea3dff850d9ae46b2abf25d08312320#egg=google_resumable_media
idna==3.10
iniconfig==2.1.0
mock==5.2.0
packaging==24.2
pluggy==1.5.0
pytest==8.3.5
pytest-cov==6.0.0
requests==2.32.3
six==1.17.0
tomli==2.2.1
urllib3==2.3.0

name: google-resumable-media-python
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.4.4=h6a678d5_1
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=3.0.16=h5eee18b_0
  - pip=25.0=py39h06a4308_0
  - python=3.9.21=he870216_1
  - readline=8.2=h5eee18b_0
  - setuptools=75.8.0=py39h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - tzdata=2025a=h04d1e81_0
  - wheel=0.45.1=py39h06a4308_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - certifi==2025.1.31
      - charset-normalizer==3.4.1
      - coverage==7.8.0
      - exceptiongroup==1.2.2
      - idna==3.10
      - iniconfig==2.1.0
      - mock==5.2.0
      - packaging==24.2
      - pluggy==1.5.0
      - pytest==8.3.5
      - pytest-cov==6.0.0
      - requests==2.32.3
      - six==1.17.0
      - tomli==2.2.1
      - urllib3==2.3.0
prefix: /opt/conda/envs/google-resumable-media-python

tests/unit/requests/test_download.py::TestDownload::test_consume_with_custom_timeout tests/unit/requests/test_download.py::TestDownload::test_consume_with_stream tests/unit/requests/test_download.py::TestDownload::test_consume_with_stream_hash_check_success tests/unit/requests/test_download.py::TestDownload::test_consume_with_stream_hash_check_fail tests/unit/requests/test_download.py::TestDownload::test_consume_with_headers tests/unit/requests/test_download.py::TestRawDownload::test__write_to_stream_no_hash_check tests/unit/requests/test_download.py::TestRawDownload::test__write_to_stream_with_hash_check_success tests/unit/requests/test_download.py::TestRawDownload::test__write_to_stream_with_hash_check_fail tests/unit/requests/test_download.py::TestRawDownload::test_consume tests/unit/requests/test_download.py::TestRawDownload::test_consume_with_custom_timeout tests/unit/requests/test_download.py::TestRawDownload::test_consume_with_stream tests/unit/requests/test_download.py::TestRawDownload::test_consume_with_stream_hash_check_success tests/unit/requests/test_download.py::TestRawDownload::test_consume_with_stream_hash_check_fail tests/unit/requests/test_download.py::TestRawDownload::test_consume_with_headers tests/unit/requests/test_download.py::TestChunkedDownload::test_consume_next_chunk_already_finished tests/unit/requests/test_download.py::TestChunkedDownload::test_consume_next_chunk tests/unit/requests/test_download.py::TestChunkedDownload::test_consume_next_chunk_with_custom_timeout tests/unit/requests/test_download.py::TestRawChunkedDownload::test_consume_next_chunk_already_finished tests/unit/requests/test_download.py::TestRawChunkedDownload::test_consume_next_chunk tests/unit/requests/test_download.py::TestRawChunkedDownload::test_consume_next_chunk_with_custom_timeout tests/unit/requests/test_download.py::Test__get_expected_md5::test__w_header_present tests/unit/requests/test_download.py::Test__get_expected_md5::test__w_header_missing tests/unit/requests/test_download.py::Test__parse_md5_header::test_empty_value tests/unit/requests/test_download.py::Test__parse_md5_header::test_crc32c_only tests/unit/requests/test_download.py::Test__parse_md5_header::test_md5_only tests/unit/requests/test_download.py::Test__parse_md5_header::test_both_crc32c_and_md5 tests/unit/requests/test_download.py::Test__parse_md5_header::test_md5_multiple_matches tests/unit/requests/test_download.py::test__DoNothingHash tests/unit/requests/test_download.py::Test__add_decoder::test_non_gzipped tests/unit/requests/test_download.py::Test__add_decoder::test_gzipped tests/unit/requests/test_download.py::Test_GzipDecoder::test_constructor tests/unit/requests/test_download.py::Test_GzipDecoder::test_decompress tests/unit/requests/test_upload.py::TestSimpleUpload::test_transmit tests/unit/requests/test_upload.py::TestSimpleUpload::test_transmit_w_custom_timeout tests/unit/requests/test_upload.py::TestMultipartUpload::test_transmit tests/unit/requests/test_upload.py::TestMultipartUpload::test_transmit_w_custom_timeout tests/unit/requests/test_upload.py::TestResumableUpload::test_initiate tests/unit/requests/test_upload.py::TestResumableUpload::test_initiate_w_custom_timeout tests/unit/requests/test_upload.py::TestResumableUpload::test_transmit_next_chunk tests/unit/requests/test_upload.py::TestResumableUpload::test_transmit_next_chunk_w_custom_timeout tests/unit/requests/test_upload.py::TestResumableUpload::test_recover
tests/unit/requests/test_download.py::TestDownload::test__write_to_stream_no_hash_check tests/unit/requests/test_download.py::TestDownload::test__write_to_stream_with_hash_check_success tests/unit/requests/test_download.py::TestDownload::test__write_to_stream_with_hash_check_fail tests/unit/requests/test_download.py::TestDownload::test_consume
google/resumable_media/requests/download.py google/resumable_media/_download.py google/resumable_media/_upload.py google/resumable_media/requests/upload.py
google/resumable_media/requests/download.py google/resumable_media/_download.py google/resumable_media/_upload.py google/resumable_media/requests/upload.py