It seems that more and more nowadays, Chilkat has customers needing to download gigantic files (many Gigabytes) using various protocols such as SFTP, FTP, or HTTP. These downloads can take a long time, even with a very good transfer rate. The longer the download time, the higher the probability that …
This post clarifies the topic of binary vs. ascii uploads/downloads for SFTP (Secure File Transfer over SSH) and FTP. Binary mode transmits bytes exactly as-is. Text mode (also known as “ascii” mode) can modify line endings (CR’s and LF’s) to the canonical convention used on the remote system. For …
The following error is explained in this post: ChilkatLog: DownloadFileByName: DllDate: Apr 25 2018 ChilkatVersion: 9.5.0.73 UnlockPrefix: * Architecture: Little Endian; 64-bit Language: Cocoa Objective-C VerboseLogging: 0 SftpVersion: 3 Component successfully unlocked using purchased unlock code. Must first connect to the SSH server. –DownloadFileByName –ChilkatLog The above error can happen …
This example demonstrates how to open a remote file on an SSH/SFTP server, write to the file, and then close it. This is analogous to opening a local file, writing to it, and closing it. The SFTP protocol (i.e. Secure File Transfer over SSH), follows the same concepts as typical …
Added support for the hmac-sha2-512,hmac-sha2-256,hmac-ripemd160 algorithms to SSH/SFTP internal transport.
A minor fix to SFtp.ResumeDownloadFileByName: If the complete file already exists locally such that nothing needed to be downloaded, the method incorrectly returned a failed status. This has been fixed.
The SFTP IsConnected property did not report that the connection was lost if the machine’s Internet connection is disconnected.
Question: In the online reference documentation, it says that “bool UploadFileByName(string remoteFilePath, string localFilePath)” will return true if success or false for failure. My question is that how does your component know that the file had been transferred successfully? Does it get ACK from SFTP server or that only means …
SSH RFC 4250 The Secure Shell (SSH) Protocol Assigned Numbers RFC 4251 The Secure Shell (SSH) Protocol Architecture RFC 4252 The Secure Shell (SSH) Authentication Protocol RFC 4253 The Secure Shell (SSH) Transport Layer Protocol RFC 4254 The Secure Shell (SSH) Connection Protocol RFC 4255 Using DNS to Securely Publish …
Clarification on the acronyms “SFTP” and “FTPS” “SFTP” is the Secure File Transfer Protocol over SSH. It is a protocol unrelated to the FTP protocol. (It is actually a subsystem of SSH.) The Chilkat SSH / SFTP component is used for “SFTP”. SFTP is achieved by connecting to an SSH …