Thanks Colin, but you missed the topic a little ;)
There simply is no Apache ;)
I already do it a similar way and record stuff in RRDs and want to speed
it up without changing the Webserver..
Michael
On 19.03.2014 00:45, Colin Reese wrote:
> Databases are NOT useless! Besides all the data enforcement, I want to
> plot things and store logs and variables. This is a silly thing to say.
>
> If you are firmly against storing any data, for any reason, take the
> following boilerplate ajax call (in your web page):
>
> function showMeData(data) {
>
> console.log(data); // or do whatever else you want here
>
> }
>
> function myAjaxFunction(sensorname,callback){
> $.ajax({
> var callback=showMeData;
> url: "/wsgireadsensor",
> type: "post",
> datatype:"json",
> data: {'sensorname':sensorname},
> success: function(response){
> // Execute our callback function
> callback(response);
> }
> });
>
> myAjaxFunction('blurgety-bloog',showMeData)
>
>
> Put your rendering/processing in showMeData, and call myAjaxFunction whenever
> you want. It is non-blocking (or not, if you want).
>
> All you need is a wsgi script on your server called "wsgireadsensor":
>
>
> def application(environ, start_response):
> import cgi, json
> from mylib import readowserversensor
>
> post_env = environ.copy()
> post_env['QUERY_STRING'] = ''
> post = cgi.FieldStorage(
> fp=environ['wsgi.input'],
> environ=post_env,
> keep_blank_values=True
> )
>
> # Get the form data
> formname=post.getvalue('name')
> data={}
> d={}
> for k in post.keys():
> d[k] = post.getvalue(k)
>
> status = '200 OK'
>
> # Run stuff as requested
> if 'sensorname' in d :
> data['result']= readowserversensor(d['sensorname'])
> if data['result']:
> data['status']='success!'
> else:
> data['status']='fail!'
> else:
> data=['empty']
>
> output = json.dumps(data,indent=1)
> response_headers = [('Content-type', 'application/json')]
> start_response(status,response_headers)
> return [output]
>
> Enable mod_wsgi and pop "WSGIScriptAlias /wsgisreadsensor
> /mydirectoryforwsgiscripts" into your apache site configuration and you're
> done. The data is returned to your web page call as json.
>
>
> See here for details:
> http://www.cupidcontrols.com/2014/01/creating-a-responsive-user-interface-updating-browser-data-in-real-time-using-jquery-and-ajax/
>
>
> Colin
>
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