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Optimize buffer size for put_file.

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This commit is contained in:
Chris Church 2014-06-19 15:37:35 -05:00
parent cd28044006
commit 4e738e6fa9
1 changed files with 17 additions and 12 deletions
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29
lib/ansible/runner/connection_plugins/winrm.py
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@ -101,7 +101,7 @@ class Connection(object):
if exc:
raise exc
def _winrm_exec(self, command, args, from_exec=False):
def _winrm_exec(self, command, args=(), from_exec=False):
if from_exec:
vvvv("WINRM EXEC %r %r" % (command, args), host=self.host)
else:
@ -154,9 +154,23 @@ class Connection(object):
vvv("PUT %s TO %s" % (in_path, out_path), host=self.host)
if not os.path.exists(in_path):
raise errors.AnsibleFileNotFound("file or module does not exist: %s" % in_path)
buffer_size = 1024 # FIXME: Find max size or optimize.
with open(in_path) as in_file:
in_size = os.path.getsize(in_path)
script_template = '''
$s = [System.IO.File]::OpenWrite("%s");
$s.Seek(%d, [System.IO.SeekOrigin]::Begin) | Out-Null;
$b = [System.Convert]::FromBase64String("%s");
$s.Write($b, 0, $b.length) | Out-Null;
$s.SetLength(%d) | Out-Null;
$s.Close() | Out-Null;
'''
# Determine max size of data we can pass per command.
script = script_template % (powershell._escape(out_path), in_size, '', in_size)
cmd = powershell._encode_script(script)
# Encode script with no data, subtract its length from 8190 (max
# windows command length), divide by 2.67 (UTF16LE base64 command
# encoding), then by 1.35 again (data base64 encoding).
buffer_size = int(((8190 - len(cmd)) / 2.67) / 1.35)
for offset in xrange(0, in_size, buffer_size):
try:
out_data = in_file.read(buffer_size)
@ -164,16 +178,7 @@ class Connection(object):
if out_data.lower().startswith('#!powershell') and not out_path.lower().endswith('.ps1'):
out_path = out_path + '.ps1'
b64_data = base64.b64encode(out_data)
script = '''
$bufferSize = %d;
$stream = [System.IO.File]::OpenWrite("%s");
$stream.Seek(%d, [System.IO.SeekOrigin]::Begin) | Out-Null;
$data = "%s";
$buffer = [System.Convert]::FromBase64String($data);
$stream.Write($buffer, 0, $buffer.length) | Out-Null;
$stream.SetLength(%d) | Out-Null;
$stream.Close() | Out-Null;
''' % (buffer_size, powershell._escape(out_path), offset, b64_data, in_size)
script = script_template % (powershell._escape(out_path), offset, b64_data, in_size)
vvvv("WINRM PUT %s to %s (offset=%d size=%d)" % (in_path, out_path, offset, len(out_data)), host=self.host)
cmd_parts = powershell._encode_script(script, as_list=True)
result = self._winrm_exec(cmd_parts[0], cmd_parts[1:])