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file.GetContentFile: stream to disk, add callback #29

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file.GetContentFile: stream to disk, add callback #29

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33 changes: 23 additions & 10 deletions pydrive2/files.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@

from googleapiclient import errors
from googleapiclient.http import MediaIoBaseUpload
from googleapiclient.http import MediaIoBaseDownload
from functools import wraps

from .apiattr import ApiAttribute
Expand Down Expand Up @@ -220,7 +221,10 @@ def GetContentString(
self.FetchContent(mimetype, remove_bom)
return self.content.getvalue().decode(encoding)

def GetContentFile(self, filename, mimetype=None, remove_bom=False):
@LoadMetadata
def GetContentFile(
self, filename, mimetype=None, remove_bom=False, callback=None
):
"""Save content of this file as a local file.

:param filename: name of the file to write to.
Expand All @@ -229,17 +233,26 @@ def GetContentFile(self, filename, mimetype=None, remove_bom=False):
:type mimetype: str
:param remove_bom: Whether to remove the byte order marking.
:type remove_bom: bool
:param callback: passed two arguments: (total trasferred, file size).
:type param: callable
:raises: ApiRequestError, FileNotUploadedError, FileNotDownloadableError
"""
if (
self.content is None
or type(self.content) is not io.BytesIO
or self.has_bom == remove_bom
):
self.FetchContent(mimetype, remove_bom)
f = open(filename, "wb")
f.write(self.content.getvalue())
f.close()
file_id = self.metadata.get("id") or self.get("id")
request = self.auth.service.files().get_media(fileId=file_id)
with open(filename, mode="w+b") as fd:
downloader = MediaIoBaseDownload(fd, request)
done = False
while done is False:
status, done = downloader.next_chunk()
if callback:
callback(status.resumable_progress, status.total_size)

if mimetype == "text/plain" and remove_bom:
fd.seek(0)
self._RemovePrefix(
fd, MIME_TYPE_TO_BOM[self["mimeType"]][mimetype]
)
self.has_bom = not remove_bom

@LoadAuth
def FetchMetadata(self, fields=None, fetch_all=False):
Expand Down