49 lines
3.7 KiB
Markdown
49 lines
3.7 KiB
Markdown
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---
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layout: page
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title: File Transfer Protocols
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---
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ENiGMA½ currently relies on external executables for "legacy" file transfer protocols such as X, Y, and ZModem. The `fileTransferProtocols` section of `config.hjson` is used to override defaults, add new handlers, etc. Remember that ENiGMA½ also support modern web (HTTP/HTTPS) downloads!
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## File Transfer Protocols
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File transfer protocols are managed via the `fileTransferProtocols` configuration block of `config.hjson`. Each entry defines an **external** protocol that can be used for uploads (recv), downloads (send), or both. Depending on the protocol and handler, batch receiving of files (uploads) may also be available.
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### Predefined File Transfer Protocols
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The following file transfer protocols are pre-configured in ENiGMA½ as of this writing. System operators may override or extend this list. PRs are welcome for pre-configured additions!
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#### SEXYZ
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[SEXYZ from Synchronet](http://wiki.synchro.net/util:sexyz) offers a nice X, Y, and ZModem implementation including ZModem-8k & works under *nix and Windows based systems. As of this writing, ENiGMA½ is pre-configured to support ZModem-8k, XModem, and YModem using SEXYZ. An x86_64 Linux binary, and hopefully more in the future, [can be downloaded here](http://132.0.0.249/bbs-linux-binaries/).
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#### sz/rz
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ZModem-8k is configured using the standard Linux [sz(1)](https://linux.die.net/man/1/sz) and [rz(1)](https://linux.die.net/man/1/rz) binaries. Note that these binaries also support XModem and YModem, and as such adding the configurations to your system should be fairly straight forward.
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Generally available as `lrzsz` under Apt or Yum type packaging.
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### File Transfer Protocol Configuration
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The following top-level members are available to an external protocol configuration:
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* `name`: Required; Display name of the protocol
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* `type`: Required; Currently must be `external`. This will be expanded upon in the future with built in protocols.
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* `sort`: Optional; Sort key. If not provided, `name` will be used for sorting.
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For protocols of type `external` the following members may be defined:
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* `sendCmd`: Required for protocols that can send (allow user downloads); The command/binary to execute.
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* `sendArgs`: Required if using `sendCmd`; An array of arguments. A placeholder of `{fileListPath}` may be used to supply a path to a **file containing** a list of files to send, or `{filePaths}` to supply *1:n* individual file paths to send.
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* `recvCmd`: Required for protocols that can receive (allow user uploads); The command/binary to execute.
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* `recvArgs`: Required if using `recvCmd` and supporting **batch** uploads; An array of arguments. A placeholder of `{uploadDir}` may be used to supply the system provided upload directory. If `{uploadDir}` is not present, the system expects uploaded files to be placed in CWD which will be set to the upload directory.
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* `recvArgsNonBatch`: Required if using `recvCmd` and supporting non-batch (single file) uploads; A placeholder of `{fileName}` may be supplied to indicate to the protocol what the uploaded file should be named (this will be collected from the user before the upload starts).
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* `escapeTelnet`: Optional; If set to `true`, escape all internal Telnet related codes such as IAC's. This option is required for external protocol handlers such as `sz` and `rz` that do not escape themselves.
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#### Example File Transfer Protocol Configuration
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```
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zmodem8kSexyz : {
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name : 'ZModem 8k (SEXYZ)',
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type : 'external',
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sort : 1,
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external : {
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sendCmd : 'sexyz',
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sendArgs : [ '-telnet', '-8', 'sz', '@{fileListPath}' ],
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recvCmd : 'sexyz',
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recvArgs : [ '-telnet', '-8', 'rz', '{uploadDir}' ],
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recvArgsNonBatch : [ '-telnet', '-8', 'rz', '{fileName}' ],
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}
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}
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```
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