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Archived Forum PostQuestion:
Hello, I'm downloading a TXT file via SFTP with command:
success = sftp.DownloadFileByName(remoteFilePath, localFilePath);
and it works but the file is missing of last chars. The log tell me the file is 4488 bytes, but really is 4522. Chilkat logs:
DownloadFileByName:
DllDate: May 25 2017
ChilkatVersion: 9.5.0.68
UnlockPrefix: GLOCALSSH
Architecture: Little Endian; 64-bit
Language: .NET 4.5 / x64
VerboseLogging: 1
SshVersion: SSH-2.0-SSH
SftpVersion: 3
downloadFileByName:
PreserveDate: 0
fromFilePath: OUTPUT/AGOPT20170626.TXT
toFilePath: D:\TEMP\ImportFlussi\OUTPUT\AGOPT20170626.TXT
fromFilePathUtf8_QP: OUTPUT/AGOPT20170626.TXT
toFilePathUtf8_QP: D:\TEMP\ImportFlussi\OUTPUT\AGOPT20170626.TXT
OpenRemoteFile:
sftpOpenFile:
filepathUtf8_QP: OUTPUT/AGOPT20170626.TXT
remotePath: OUTPUT/AGOPT20170626.TXT
access: readOnly
createDisposition: openExisting
v3Flags: 0x1
sendPacket:
channelSendData2:
(leaveContext)
(leaveContext)
Sent FXP_OPEN
readSftpPacket:
(leaveContext 93ms)
handle: 2F4F55545055542F41474F505432303137303632362E545854
(leaveContext 93ms)
timeToOpenMs: Elapsed time: 93 millisec
(leaveContext 93ms)
FetchRemoteFileAttributes:
fetchAttributes:
bFollowLinks: 1
bIsHandle: 0
bSizeOnly: 1
filename: OUTPUT/AGOPT20170626.TXT
serverVersion: 3
Using FXP_STAT
sendPacket:
channelSendData2:
(leaveContext)
(leaveContext 16ms)
Sent message to fetch attributes.
readSftpPacket:
(leaveContext)
Received SSH_FXP_ATTRS
unpackFileAttr_v3:
validFlags: 0xd
size: 4488
permissions: 0x81ff
octalPermissions: 100777
type: 1
lastAccessTime32: 0x59511690
lastModifiedTime32: 0x59511690
(leaveContext)
(leaveContext 16ms)
timeToFetchAttrMs: Elapsed time: 16 millisec
(leaveContext 16ms)
remoteFileSize: 4488
resumeFlag: 0
openForReadWriteWin32:
(leaveContext)
numBytesToDownload: 4488
soRcvBuf: 4194304
soSndBuf: 262144
cryptAlgorithm: aes
macAlgorithm: SHA-1
compression: no
newDownloadLoop:
offset64: 0
numBytesToDownload: 4488
readUntilEnd: 0
sendFxpRead:
sendPacket:
sendChannelData:
(leaveContext)
(leaveContext)
(leaveContext)
(leaveContext 78ms)
sftpCloseHandle:
handle: 2F4F55545055542F41474F505432303137303632362E545854
sendPacket:
channelSendData2:
(leaveContext)
(leaveContext)
Sent FXP_CLOSE
readSftpPacket:
(leaveContext 31ms)
StatusResponseFromServer:
Request: FXP_CLOSE
InformationReceivedFromServer:
StatusCode: 0
StatusMessage: The operation completed
(leaveContext)
(leaveContext)
(leaveContext 31ms)
timeToCloseHandleMs: Elapsed time: 31 millisec
Closing local output file...
Verifying local output file size...
localFileSizeAfterDownload: 4488
expectedFileSizeAfterDownload: 4488
Good. The local file is the expected size.
totalTimeMs: Elapsed time: 250 millisec
(leaveContext 250ms)
Success.
(leaveContext 250ms)
Server Logs with filezilla client: 1 Filezilla asks 32768 bytes and get 4522 (really dimension) 2017-06-26 16:17:22,742 [Thread-140] INFO SPXPSshdLoggingListener - Remote client wants 32768 bytes from file at offset 0 localwindow=130817 remotewindow=2147483273 2017-06-26 16:17:22,742 [Thread-140] INFO SpecialLog - SFTPSERVERCMD: (xxxx@/xxxxxxx:50907) readFile /OUTPUT/AGOPT20170626.TXT 2017-06-26 16:17:22,742 [Thread-140] TRACE SFTPVirtualFileSystem - Entering SFTPVirtualFileSystem.readFile: 2017-06-26 16:17:22,742 [Thread-140] TRACE SFTPVirtualFileSystem - fileHandle: 2F4F55545055542F41474F505432303137303632362E545854 offset: 0 buf.length: 32785 start: 13 numBytesToRead: 32768 2017-06-26 16:17:22,742 [Thread-140] TRACE SFTPVirtualFileSystem - Exiting SFTPVirtualFileSystem.readFile: 2017-06-26 16:17:22,742 [Thread-140] TRACE SFTPVirtualFileSystem - SFTPVirtualFileSystem.readFile: Returning 4522 2017-06-26 16:17:22,742 [Thread-140] INFO SPXPSshdLoggingListener - Read 4522 bytes from filesystem …2017-06-26 16:17:23,117 [Thread-140] DEBUG SPXPSshdLoggingListener - SFTP_FILE_DOWNLOAD_COMPLETE| FILE_NAME
= /OUTPUT/AGOPT20170626.TXT| SESSION_ID = [B@4f0bb37b| NFS = com.xxxxxxxxx.spxp.sftpserver.filesystem.SFTPVirtualFileSystem@38e07fc8| BYTES_TRANSFERED = 4522 SUCCESS
Serve logs with Chilkat library: 2 ChilkatDotNet45 v.9.5.0.61 asks 4488 bytes and get 4488 (not completed size!) 2017-06-26 16:17:55,211 [Thread-142] INFO SPXPSshdLoggingListener - Remote client wants 4488 bytes from file at offset 0 localwindow=130852 remotewindow=2096701 2017-06-26 16:17:55,211 [Thread-142] INFO SpecialLog - SFTPSERVERCMD: (SPZ-AXEROX@/172.30.193.146:50924) readFile /OUTPUT/AGOPT20170626.TXT 2017-06-26 16:17:55,211 [Thread-142] TRACE SFTPVirtualFileSystem - Entering SFTPVirtualFileSystem.readFile: 2017-06-26 16:17:55,211 [Thread-142] TRACE SFTPVirtualFileSystem - fileHandle: 2F4F55545055542F41474F505432303137303632362E545854 offset: 0 buf.length: 4505 start: 13 numBytesToRead: 4488 2017-06-26 16:17:55,211 [Thread-142] TRACE SFTPVirtualFileSystem - Exiting SFTPVirtualFileSystem.readFile: 2017-06-26 16:17:55,211 [Thread-142] TRACE SFTPVirtualFileSystem - SFTPVirtualFileSystem.readFile: Returning 4488 2017-06-26 16:17:55,211 [Thread-142] INFO SPXPSshdLoggingListener - Read 4488 bytes from filesystem 2017-06-26 16:17:55,258 [Thread-142] DEBUG SPXPSshdLoggingListener - SFTP_FILE_DOWNLOAD_COMPLETE| FILE_NAME = OUTPUT/AGOPT20170626.TXT| SESSION_ID = [B@77c16c5f| NFS = com.xxxxxxxx.spxp.sftpserver.filesystem.SFTPVirtualFileSystem@52e42811| BYTES_TRANSFERED = 4488 SUCCESS
The problem is SSH (SFTP) server tell to Chilkat wrong file size. So Chilkat download only a part.
A workaround using ReadFileByte could be:
using (var fs = new FileStream(LocalDestinationFilename, FileMode.Create, FileAccess.Write))
{
string handle = sftp.OpenFile(RemoteFileName, "readOnly", "openExisting");
while (!sftp.Eof(handle))
{
byte[] byteArray = sftp.ReadFileBytes(handle, 131072);
fs.Write(byteArray, 0, byteArray.Length);
}
}
Paolo Celoria , could you tell us that you use which sftp server? Thanks.
Paolo Celoria , you should know so chilkat will adapter it and we will do attention about it.
I discover that the number of missing chars at the end of file is equal to number of lines of the file. Probably passing from Linux SFTP to Windows (download with chilkat), the LF/CR were added to byte count and the download is stopped before the end! This coul help you? Thanks