Use httpreqeust to read from your php on the server into a variable
(serverresponse) on the gears computer.
Then you can use a worker to read data into the sql database.
I use something like this:
Note: Settext is just for returning some info back to the user
function floadfromdatabase(){
if (script_active==1)
{settext("Error: Script is already running...","program_status");
return false;}
if (checkonlinestatus()==false)
{settext("Error: Not online. Network error?","program_status");
return false;}
settext("Reading data from main DB...","program_status");
script_active=1;
var link="/getdata.php?q=" + Math.floor(Math.random() * 100000); ;
data="";
var request = google.gears.factory.create('beta.httprequest');
request.open('GET', link);
request.onreadystatechange = function() {
if (request.readyState == 4) {
try {
data=request.responseText;
}
catch (ex) {
settext("Status: Error reading data from main
DB","program_status");
active_script=0;
return;
}
if (data.length==0)
settext('<font color="RED">No data found. Network error?</
font>',"program_status")
else {
settext("Status: "+data.length+" byte(s) read from main DB,
adding data to local DB","program_status");
insertdata(data);
}
}
};
request.send();
}
function insertdata(data){
var childWorkerId =
workerPool.createWorkerFromUrl('databaseworker.js');
workerPool.sendMessage(data, childWorkerId);
return;
}
// databaseworker.js
var wp = google.gears.workerPool;
wp.onerror = function(errorObject) {
alert("Error in workerPool: "+errorObject.message+" on
line"+errorObject.lineNumber);
};
wp.onmessage = function(a, b, message) {
if (1) {
try {
eval("dataarr="+serverresponse);
}
catch (ex) {
alert("Error: No valid data found..");
return;
}
var dbcount=0;
var reply="no reply";
var db ;
db= google.gears.factory.create('beta.database');
if (db) {
db.open('yourdatabase');
db.execute('begin');
db.execute('drop table if exists yourtable');
db.execute('create table if not exists yourtable' +
' (yourfield1, yourfield2, yourfield3, primary key
(yourfield1))');
for (x in dataarr)
{
db.execute('insert into yourtable values(?,?,?)',
[dataarr[x].yourfield1,dataarr[x].yourfield2,dataarr
[x].yourfield3];
dbcount++;
//if (dbcount%100==0)
//wp.sendMessage(dbcount+" record(s) added....",
message.sender);
}
}
db.execute('commit');
db.close();
reply=dbcount+" record(s) added from main DB, finished"; }
wp.sendMessage(reply, message.sender);
}
On Feb 9, 10:14 pm, meerkat <[email protected]> wrote:
> Ok. Got round the php4 issue.
>
> Any clues on how to do "data from server is saved in serverresponse"?
>
> Thanks
>
> On Feb 9, 2:34 pm, meerkat <[email protected]> wrote:
>
> > The web server I am working with is still on php4. This means
> > json_encode($dataarray); is not supported. What strategy would I use
> > instead?
> > Thanks,
> > meerkat
>
> > On Feb 9, 1:03 pm, "Tosca Lahiri" <[email protected]> wrote:
>
> > > Thanks for this advice.
> > > In the php code is the $dataarray made up of:
> > > [fieldname, value]?
>
> > > I have found the xml tutorial you suggested...it is very good. That is
> > > what
> > > made me go down the xml route. I can see now however why the json option
> > > is
> > > preferable.
> > > TML
>
> > > -----Original Message-----
> > > > From: [email protected] [mailto:[email protected]]
> > > > On Behalf Of Oblygre
> > > > Sent: Monday, February 09, 2009 6:41 AM
> > > > To: Gears Users
> > > > Subject: [gears-users] Re: MYSQL XML SQLITE
>
> > > > I think its easier to use json istead of xml, this saves a lot of time
> > > > in javascript, and PHP have built in functions to convert to json.
>
> > > > Example:
>
> > > > In your php script:
> > > > echo json_encode($dataarray); // $dataarray contains all your db data
>
> > > > In your gearscode:
> > > > //data from server is saved in serverresponse
> > > > //
> > > > try {
> > > > eval("dataarr="+serverresponse);
>
> > > > }
> > > > catch (ex) {
> > > > alert("Error: No valid data found..");
> > > > return;
> > > > }
>
> > > > var dbcount=0;
> > > > var reply="no reply";
> > > > var db ;
> > > > db= google.gears.factory.create('beta.database');
> > > > if (db) {
> > > > db.open('yourdatabase');
> > > > db.execute('begin');
> > > > db.execute('drop table if exists yourtable');
> > > > db.execute('create table if not exists yourtable' +
> > > > ' (yourfield1, yourfield2, yourfield3, primary key
> > > > (yourfield1))');
> > > > for (x in dataarr)
> > > > {
> > > > db.execute('insert into yourtable values(?,?,?)',
> > > > [dataarr[x].yourfield1,dataarr[x].yourfield2,dataarr
> > > > [x].yourfield3];
> > > > dbcount++;
> > > > //if (dbcount%100==0)
> > > > //wp.sendMessage(dbcount+" record(s) added....",
> > > > message.sender);
> > > > }
> > > > }
> > > > db.execute('commit');
> > > > db.close();
> > > > reply=dbcount+" record(s) added from main DB, finished";
>
> > > > A link to a tutorial using XML:
> > > >http://www.onlamp.com/pub/a/onlamp/2007/06/28/the-power-of-google-gears-
> > > > part-1.html
>
> > > > On Feb 8, 2:37 am, TML <[email protected]> wrote:
> > > > > Just to clarify...I mean programmatically, not a one off with a tool.
> > > > > When the user goes online on their pda the data is imported into the
> > > > > locally held sqlite db.
>
> > > > > On Feb 8, 1:34 am, TML <[email protected]> wrote:
>
> > > > > > Hello,
>
> > > > > > I have a MySQL DB on web server. I have php page that extracts the
> > > > > > data from table and creates an XML file.
>
> > > > > > Now, I need to know how to import that data in the XML file into the
> > > > > > Gears sqlite DB on PDA?
>
> > > > > > Any suggestions?
>
> > > > > > Thanks,
> > > > > > TML
