Installation

node-rfc is a wrapper for the SAP NetWeaver RFC Library and you need to obtain and install it first.

If NodeJS is not already installed on your system, you need to download and install it as well.

SAP NW RFC Library Installation

The entry page for SAP NetWeaver RFC library is SAP Service Marketplace (SMP), http://service.sap.com/rfc-library, with detailed instructions how to download, use and compile.

Basically, you should search for SAP NW RFC SDK 7.20, in Software Downloads of SAP Software Download Center on SMP Support Portal, download SAP NW RFC Library adequate for your platform and unpack using SAPCAR archive utility.

_images/SMP-SAPNWRFCSDK.png

SAPCAR can be donwloaded from the SMP as well and you should search for SAPCAR 7.20

_images/SMP-SAPCAR.png

Which SAP NW RFC Library version is relevant for your platform? Here are platform/Python combinations tested so far:

Platform NetWeaver RFC Library (SMP) Filename (SMP)
Windows Windows on x64 64bit NWRFC_20-20004568.SAR
Linux Linux on x86_64 64bit NWRFC_20-20004565.SAR

Note

  • SAP NW RFC Library is fully backwards compatible and it is reccomended using the newest version also for older backend system releases
  • SMP search terms and filenames given here will not be regularly updated, you should always search for current version or filename in Software Downloads.
  • The server functionality is currently not working under Windows 32bit

The NodeJS connector relies on SAP NW RFC Library and must be able to find library files at runtime. Therefore, you might either install the SAP NW RFC Library in the standard library paths of your system or install it in any location and tell the NodeJS connector where to look.

Here are configuration examples for Windows and Linux operating systems.

Windows

  1. Create an directory, e.g. c:\nwrfcsdk.
  2. Unpack the SAR archive to it, e.g. c:\nwrfcsdk\lib shall exist.
  3. Include the lib directory to the library search path on Windows, i.e. extend the PATH environment variable.

Add c:\nwrfcsdk\lib to PATH

Linux

  1. Create the directory, e.g. /usr/local/sap/nwrfcsdk.

  2. Unpack the SAR archive to it, e.g. /usr/local/sap/nwrfcsdk/lib shall exist.

  3. Include the lib directory in the library search path:

    • As root, create a file /etc/ld.so.conf.d/nwrfcsdk.conf and enter the following values:

      # include nwrfcsdk
      /usr/local/sap/nwrfcsdk/lib
      
    • As root, run the command ldconfig.

node-rfc Module Installation

If not already installed, you need to install node and npm first.

Set NODE_PATH to wherever your node modules are installed, like

set NODE_PATH=C:\Users\BSrdjan\AppData\Roaming\npm\node_modules

Install the node-rfc module from npm

npm install node-rfc

Test

Check if the module can be found and loaded:

var r = require ('node-rfc)

Call remote enabled function modules in NW backend system (maintain your test system parameters first):

node demo\demo
node demo\demo1, 2 ...

Problems

Behind a Proxy

If you are within an internal network that accesses the internet through an HTTP(S) proxy, some of the shell commands will fail with urlopen errors, etc.

Assuming that your HTTP(S) proxy could be accessed via http://proxy:8080, on Windows you can communicate this proxy to your shell via:

SET HTTP_PROXY=http://proxy:8080
SET HTTPS_PROXY=http://proxy:8080

or permanently set environment variables.

SAP NW RFC Library Installation

  1. ImportError: DLL load failed: The specified module could not be found.

    (Windows) This error indicates that the Python connector was not able to find the C connector on your system. Please check, if the lib directory of the C connector is in your PATH environment variable.

  2. ImportError: DLL load failed: %1 is not a valid Win32 application.

    (Windows) This error occurs when SAP NW RFC Library 64bit version is installed on a system with 32bit version Python.

Environment variables

Windows

The environment variable may be set within a command prompt via the set command, e.g.

  • set PATH=%PATH%;C:\nwrfcsdk\lib (extend PATH with the C connector lib)
  • set HTTPS_PROXY=proxy:8080 (setting an proxy for HTTPS communication)

When the command prompt is closed, the environment variable is reset. To achieve a persistent change of the environment variable, do the following (Windows 7):

  1. Open the Start Menu and type environment into the search box.
  2. A window opens in which the user variables are displayed in the upper part and the system variables in the lower part. You may select and edit the desired variable.
  3. The modified variables are used when a new command prompt is opened.

Building from Source

Windows

Toolchain used for building on Windows is VS2013 Professional Update 2, with native tools command prompts for 32 and 64 bit architectures:

node-gyp clean
node-gyp configure --msvs_version=2013
node-gyp build

Linux

To compile on Linux, run

node-gyp configure build

For unit tests run

npm test

For more test examples, see files in demo folder.

Building the Documentation

Change into the doc directory and type:

make clean
make html

The result is found in _build/html and for other options call make.

  • If you get an error ‘sphinx-build’ is not recognized as an internal or external command, operable program or batch file on calling make html, install sphinx

The docu is hosted on GitHub Pages, a propietary solution where a git branch gh-pages is created as an orphan and the output of the documentation build process (_build/html) is stored in that branch.

GitHub then serves these files under a special /pages/ url.

To update GitHub Pages, copy everyhing under _build/html and overwrite the existing files in the gh-pages branch root:

rm -Rf ~/tmp/html

cp doc/_build/html ~/tmp/.

git checkout gh-pages

rm -Rf *.html *.js *.inv _* doc .buildinfo

cp -R ~/tmp/html/. .

touch .nojekyll