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Support download_file with None path to return bytes

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This commit is contained in:
Lonami Exo 2018-04-27 20:58:08 +02:00
parent b71511cd63
commit f16289cf93
1 changed files with 15 additions and 5 deletions
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20
telethon/telegram_client.py
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@ -2174,7 +2174,7 @@ class TelegramClient(TelegramBareClient):
def download_file(self,
input_location,
file,
file=None,
part_size_kb=None,
file_size=None,
progress_callback=None):
@ -2185,10 +2185,13 @@ class TelegramClient(TelegramBareClient):
input_location (:tl:`InputFileLocation`):
The file location from which the file will be downloaded.
file (`str` | `file`):
file (`str` | `file`, optional):
The output file path, directory, or stream-like object.
If the path exists and is a file, it will be overwritten.
If the file path is ``None``, then the result will be
saved in memory and returned as `bytes`.
part_size_kb (`int`, optional):
Chunk size when downloading files. The larger, the less
requests will be made (up to 512KB maximum).
@ -2219,7 +2222,10 @@ class TelegramClient(TelegramBareClient):
raise ValueError(
'The part size must be evenly divisible by 4096.')
if isinstance(file, str):
in_memory = file is None
if in_memory:
f = io.BytesIO()
elif isinstance(file, str):
# Ensure that we'll be able to download the media
helpers.ensure_parent_dir_exists(file)
f = open(file, 'wb')
@ -2261,7 +2267,11 @@ class TelegramClient(TelegramBareClient):
# So there is nothing left to download and write
if not result.bytes:
# Return some extra information, unless it's a CDN file
return getattr(result, 'type', '')
if in_memory:
f.flush()
return f.getvalue()
else:
return getattr(result, 'type', '')
f.write(result.bytes)
__log__.debug('Saved %d more bytes', len(result.bytes))
@ -2276,7 +2286,7 @@ class TelegramClient(TelegramBareClient):
cdn_decrypter.client.disconnect()
except:
pass
if isinstance(file, str):
if isinstance(file, str) or in_memory:
f.close()
# endregion