12-11-2011
Passing shell variables to a webpage
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
This is my assignment as a whole - Use SVG to present certain dynamic (the raw data should change at least once a day) data visually. Consider using any of the conventional ways of that illustrating data (charts, figures, graphs, maps. etc.) or consider more experimental ways of visualizing data such as shown in the work of Edward Tufte or in some of the illustrations of similarity using OWL. Hopefully, your illustration will help guide insights about the data that might not be apparent to someone just looking at the raw textual or numeric data.
Here's the issue. I have both the client and the server side parts done but with place holder values on the client page. I'm having issues figuring out how to get them to talk or rather pass variables to each other.
For simplicity lets work with a simple example and I can then apply that to my project. Say I have a php page or even a simple html/javascript(if possible) page that a user accesses via their web browser. I want to print or alert the variable $A. I have a server side shell script that simply assigns the variable $a to "hello." I want to somehow send that variable to my php/javascript page so that $A is also hello and the alert or echo/print is no longer blank.
Any ideas? I've used POST and GET to send data to a shell script before but its been a one way street with the shell script dynamically building the output page. Can I call the url of my cgi script and have that script then open the url of my webpage with parameters such as 'testpage.domain.com/?A=hello'
2. Relevant commands, code, scripts, algorithms:
Since I don't really want anyone to do my project for me I've outlined a simple example above so there isn't really any code to post.
3. The attempts at a solution (include all code and scripts):
I've not tried any actual coding yet because I'm not sure where to start with this but I've Google'd quite a few variations of my question to no avail.
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Slippery Rock University, Slippery Rock, PA, United States of America, Dr. David Dailey, CPSC 317
Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
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LEARN ABOUT NETBSD
npm-run-script
NPM-RUN-SCRIPT(1) NPM-RUN-SCRIPT(1)
NAME
npm-run-script - Run arbitrary package scripts
SYNOPSIS
npm run-script <command> [--silent] [-- <args>...]
alias: npm run
DESCRIPTION
This runs an arbitrary command from a package's "scripts" object. If no "command" is provided, it will list the available scripts.
run[-script] is used by the test, start, restart, and stop commands, but can be called directly, as well. When the scripts in the package
are printed out, they're separated into lifecycle (test, start, restart) and directly-run scripts.
As of ` https://blog.npmjs.org/post/98131109725/npm-2-0-0, you can use custom arguments when executing scripts. The special option -- is
used by getopt https://goo.gl/KxMmtG to delimit the end of the options. npm will pass all the arguments after the -- directly to your
script:
npm run test -- --grep="pattern"
The arguments will only be passed to the script specified after npm run and not to any pre or post script.
The env script is a special built-in command that can be used to list environment variables that will be available to the script at run-
time. If an "env" command is defined in your package, it will take precedence over the built-in.
In addition to the shell's pre-existing PATH, npm run adds node_modules/.bin to the PATH provided to scripts. Any binaries provided by
locally-installed dependencies can be used without the node_modules/.bin prefix. For example, if there is a devDependency on tap in your
package, you should write:
"scripts": {"test": "tap test/*.js"}
instead of
"scripts": {"test": "node_modules/.bin/tap test/*.js"}
to run your tests.
The actual shell your script is run within is platform dependent. By default, on Unix-like systems it is the /bin/sh command, on Windows it
is the cmd.exe. The actual shell referred to by /bin/sh also depends on the system. As of `
https://github.com/npm/npm/releases/tag/v5.1.0 you can customize the shell with the script-shell configuration.
Scripts are run from the root of the module, regardless of what your current working directory is when you call npm run. If you want your
script to use different behavior based on what subdirectory you're in, you can use the INIT_CWD environment variable, which holds the full
path you were in when you ran npm run.
npm run sets the NODE environment variable to the node executable with which npm is executed. Also, if the --scripts-prepend-node-path is
passed, the directory within which node resides is added to the PATH. If --scripts-prepend-node-path=auto is passed (which has been the
default in npm v3), this is only performed when that node executable is not found in the PATH.
If you try to run a script without having a node_modules directory and it fails, you will be given a warning to run npm install, just in
case you've forgotten.
You can use the --silent flag to prevent showing npm ERR! output on error.
You can use the --if-present flag to avoid exiting with a non-zero exit code when the script is undefined. This lets you run potentially
undefined scripts without breaking the execution chain.
SEE ALSO
o npm help 7 scripts
o npm help test
o npm help start
o npm help restart
o npm help stop
o npm help 7 config
January 2019 NPM-RUN-SCRIPT(1)