disable retry

sdk/core/azure-core/CHANGELOG.md

@@ -6,10 +6,11 @@
 
 - Added `azure.core.messaging.CloudEvent` model that follows the cloud event spec.
 - Added `azure.core.serialization.NULL` sentinel value
+- Improve `repr`s for `HttpRequest` and `HttpResponse`s  #16972
 
 ### Bug Fixes
 
-- Improve `repr`s for `HttpRequest` and `HttpResponse`s  #16972
+- Disable retry in stream downloading. (thanks to @jochen-ott-by @hoffmann for the contribution)  #16723
 
 ## 1.11.0 (2021-02-08)
 

sdk/core/azure-core/azure/core/pipeline/transport/_aiohttp.py

@@ -30,10 +30,7 @@
 import asyncio
 import aiohttp
 from multidict import CIMultiDict
-
-from requests.exceptions import (
-    ChunkedEncodingError,
-    StreamConsumedError)
+from requests.exceptions import StreamConsumedError
 
 from azure.core.configuration import ConnectionConfiguration
 from azure.core.exceptions import ServiceRequestError, ServiceResponseError
@@ -215,41 +212,20 @@ def __len__(self):
         return self.content_length
 
     async def __anext__(self):
-        retry_active = True
-        retry_total = 3
-        retry_interval = 1  # 1 second
-        while retry_active:
-            try:
-                chunk = await self.response.internal_response.content.read(self.block_size)
-                if not chunk:
-                    raise _ResponseStopIteration()
-                self.downloaded += self.block_size
-                return chunk
-            except _ResponseStopIteration:
-                self.response.internal_response.close()
-                raise StopAsyncIteration()
-            except (ChunkedEncodingError, ConnectionError):
-                retry_total -= 1
-                if retry_total <= 0:
-                    retry_active = False
-                else:
-                    await asyncio.sleep(retry_interval)
-                    headers = {'range': 'bytes=' + str(self.downloaded) + '-'}
-                    resp = await self.pipeline.run(self.request, stream=True, headers=headers)
-                    if resp.http_response.status_code == 416:
-                        raise
-                    chunk = await self.response.internal_response.content.read(self.block_size)
-                    if not chunk:
-                        raise StopAsyncIteration()
-                    self.downloaded += len(chunk)
-                    return chunk
-                continue
-            except StreamConsumedError:
-                raise
-            except Exception as err:
-                _LOGGER.warning("Unable to stream download: %s", err)
-                self.response.internal_response.close()
-                raise
+        try:
+            chunk = await self.response.internal_response.content.read(self.block_size)
+            if not chunk:
+                raise _ResponseStopIteration()
+            return chunk
+        except _ResponseStopIteration:
+            self.response.internal_response.close()
+            raise StopAsyncIteration()
+        except StreamConsumedError:
+            raise
+        except Exception as err:
+            _LOGGER.warning("Unable to stream download: %s", err)
+            self.response.internal_response.close()
+            raise
 
 class AioHttpTransportResponse(AsyncHttpResponse):
     """Methods for accessing response body data.

sdk/core/azure-core/azure/core/pipeline/transport/_requests_asyncio.py

@@ -155,50 +155,24 @@ def __len__(self):
 
     async def __anext__(self):
         loop = _get_running_loop()
-        retry_active = True
-        retry_total = 3
-        retry_interval = 1  # 1 second
-        while retry_active:
-            try:
-                chunk = await loop.run_in_executor(
-                    None,
-                    _iterate_response_content,
-                    self.iter_content_func,
-                )
-                if not chunk:
-                    raise _ResponseStopIteration()
-                self.downloaded += self.block_size
-                return chunk
-            except _ResponseStopIteration:
-                self.response.internal_response.close()
-                raise StopAsyncIteration()
-            except (requests.exceptions.ChunkedEncodingError,
-                    requests.exceptions.ConnectionError):
-                retry_total -= 1
-                if retry_total <= 0:
-                    retry_active = False
-                else:
-                    await asyncio.sleep(retry_interval)
-                    headers = {'range': 'bytes=' + str(self.downloaded) + '-'}
-                    resp = self.pipeline.run(self.request, stream=True, headers=headers)
-                    if resp.status_code == 416:
-                        raise
-                    chunk = await loop.run_in_executor(
-                        None,
-                        _iterate_response_content,
-                        self.iter_content_func,
-                    )
-                    if not chunk:
-                        raise StopIteration()
-                    self.downloaded += len(chunk)
-                    return chunk
-                continue
-            except requests.exceptions.StreamConsumedError:
-                raise
-            except Exception as err:
-                _LOGGER.warning("Unable to stream download: %s", err)
-                self.response.internal_response.close()
-                raise
+        try:
+            chunk = await loop.run_in_executor(
+                None,
+                _iterate_response_content,
+                self.iter_content_func,
+            )
+            if not chunk:
+                raise _ResponseStopIteration()
+            return chunk
+        except _ResponseStopIteration:
+            self.response.internal_response.close()
+            raise StopAsyncIteration()
+        except requests.exceptions.StreamConsumedError:
+            raise
+        except Exception as err:
+            _LOGGER.warning("Unable to stream download: %s", err)
+            self.response.internal_response.close()
+            raise
 
 
 class AsyncioRequestsTransportResponse(AsyncHttpResponse, RequestsTransportResponse): # type: ignore

sdk/core/azure-core/azure/core/pipeline/transport/_requests_basic.py

@@ -26,7 +26,6 @@
 from __future__ import absolute_import
 import logging
 from typing import Iterator, Optional, Any, Union, TypeVar
-import time
 import urllib3 # type: ignore
 from urllib3.util.retry import Retry # type: ignore
 import requests
@@ -107,7 +106,6 @@ def __init__(self, pipeline, response):
         self.block_size = response.block_size
         self.iter_content_func = self.response.internal_response.iter_content(self.block_size)
         self.content_length = int(response.headers.get('Content-Length', 0))
-        self.downloaded = 0
 
     def __len__(self):
         return self.content_length
@@ -116,42 +114,20 @@ def __iter__(self):
         return self
 
     def __next__(self):
-        retry_active = True
-        retry_total = 3
-        retry_interval = 1  # 1 second
-        while retry_active:
-            try:
-                chunk = next(self.iter_content_func)
-                if not chunk:
-                    raise StopIteration()
-                self.downloaded += self.block_size
-                return chunk
-            except StopIteration:
-                self.response.internal_response.close()
+        try:
+            chunk = next(self.iter_content_func)
+            if not chunk:
                 raise StopIteration()
-            except (requests.exceptions.ChunkedEncodingError,
-                    requests.exceptions.ConnectionError):
-                retry_total -= 1
-                if retry_total <= 0:
-                    retry_active = False
-                else:
-                    time.sleep(retry_interval)
-                    headers = {'range': 'bytes=' + str(self.downloaded) + '-'}
-                    resp = self.pipeline.run(self.request, stream=True, headers=headers)
-                    if resp.http_response.status_code == 416:
-                        raise
-                    chunk = next(self.iter_content_func)
-                    if not chunk:
-                        raise StopIteration()
-                    self.downloaded += len(chunk)
-                    return chunk
-                continue
-            except requests.exceptions.StreamConsumedError:
-                raise
-            except Exception as err:
-                _LOGGER.warning("Unable to stream download: %s", err)
-                self.response.internal_response.close()
-                raise
+            return chunk
+        except StopIteration:
+            self.response.internal_response.close()
+            raise StopIteration()
+        except requests.exceptions.StreamConsumedError:
+            raise
+        except Exception as err:
+            _LOGGER.warning("Unable to stream download: %s", err)
+            self.response.internal_response.close()
+            raise
     next = __next__  # Python 2 compatibility.
 
 

sdk/core/azure-core/azure/core/pipeline/transport/_requests_trio.py

@@ -68,59 +68,29 @@ def __len__(self):
         return self.content_length
 
     async def __anext__(self):
-        retry_active = True
-        retry_total = 3
-        while retry_active:
+        try:
             try:
-                try:
-                    chunk = await trio.to_thread.run_sync(
-                        _iterate_response_content,
-                        self.iter_content_func,
-                    )
-                except AttributeError:  # trio < 0.12.1
-                    chunk = await trio.run_sync_in_worker_thread(  # pylint: disable=no-member
-                        _iterate_response_content,
-                        self.iter_content_func,
-                    )
-                if not chunk:
-                    raise _ResponseStopIteration()
-                self.downloaded += self.block_size
-                return chunk
-            except _ResponseStopIteration:
-                self.response.internal_response.close()
-                raise StopAsyncIteration()
-            except (requests.exceptions.ChunkedEncodingError,
-                    requests.exceptions.ConnectionError):
-                retry_total -= 1
-                if retry_total <= 0:
-                    retry_active = False
-                else:
-                    await trio.sleep(1)
-                    headers = {'range': 'bytes=' + str(self.downloaded) + '-'}
-                    resp = self.pipeline.run(self.request, stream=True, headers=headers)
-                    if resp.status_code == 416:
-                        raise
-                    try:
-                        chunk = await trio.to_thread.run_sync(
-                            _iterate_response_content,
-                            self.iter_content_func,
-                        )
-                    except AttributeError:  # trio < 0.12.1
-                        chunk = await trio.run_sync_in_worker_thread(  # pylint: disable=no-member
-                            _iterate_response_content,
-                            self.iter_content_func,
-                        )
-                    if not chunk:
-                        raise StopIteration()
-                    self.downloaded += len(chunk)
-                    return chunk
-                continue
-            except requests.exceptions.StreamConsumedError:
-                raise
-            except Exception as err:
-                _LOGGER.warning("Unable to stream download: %s", err)
-                self.response.internal_response.close()
-                raise
+                chunk = await trio.to_thread.run_sync(
+                    _iterate_response_content,
+                    self.iter_content_func,
+                )
+            except AttributeError:  # trio < 0.12.1
+                chunk = await trio.run_sync_in_worker_thread(  # pylint: disable=no-member
+                    _iterate_response_content,
+                    self.iter_content_func,
+                )
+            if not chunk:
+                raise _ResponseStopIteration()
+            return chunk
+        except _ResponseStopIteration:
+            self.response.internal_response.close()
+            raise StopAsyncIteration()
+        except requests.exceptions.StreamConsumedError:
+            raise
+        except Exception as err:
+            _LOGGER.warning("Unable to stream download: %s", err)
+            self.response.internal_response.close()
+            raise
 
 class TrioRequestsTransportResponse(AsyncHttpResponse, RequestsTransportResponse):  # type: ignore
     """Asynchronous streaming of data from the response.