CouchDB Real-time Ajax Update

Question

I am working on a simple PHP application using CouchDB and PHP-on-Couch to access some views, and it works great. The next step is to introduce Ajax to update the interface with data from the database.

As far as I understand, you can use _changes alerts to detect any changes made to the database quite easily. So, this is a question of monitoring index.html for changes (through a long poll), which calls loadView.php to update the contents of the page.

First of all, I hope this is the right way around this ...

Secondly , when viewed on index.html, the page never seems to load completely (the page loading bar never ends). When a change occurs, Firebug displays the results as expected, but not subsequent changes. At this time, the page seems to have stopped the endless loading.

So far I am using jQuery to call Ajax ...

$.getJSON('http://localhost:5984/db?callback=?', function(db) {
    console.log(db.update_seq);
    $.getJSON('http://localhost:5984/db/_changes?since='+db.update_seq+'&feed=continuous&callback=?', function(changes) {
        console.log(changes);
    });
});

Any ideas what could happen here?

Answer 1

I find the answer simple enough.

longpoll - AJAX, , , HTML . , , ; , .

COMET. "" HTTP-, ( , ..). , , zoom, Couch .

, feed=longpoll feed=continuous , .

CouchDB , , Couchbase Single Server API.