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POAngular synchronous http loop to update progress bar
 

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  1. POAngular synchronous http loop to update progress bar
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    <p>I'm trying to update a progress bar with a sequential http request inside a foreach, this works, but it's not synchronous by on complete, progress bar is being sync'd by the http call, what am I doing wrong? </p> <pre><code>angular.forEach(queue, function (item) { if (item.uid) { d.item = item; $http({ url: BASE_URL + 'upp', method: 'post', data: d }).then(function(res){ x++; update_progress((x/queue_count)*100); }); } }); </code></pre> <p>I would like to call the update_progress function just when the http returns as finished (200 OK), so the progress bar shows the actual progress correctly. Thanks!</p> <p><strong>Edit</strong>:</p> <p>I tried checking the response status, before calling the *update_progress* function and it still does not work as expected. I wasn't aware that 200 was dispatched before the request is completed :| By logic, the <strong>res</strong> obj shouldn't be the <em>response</em> of the http request? I mean, if it's 200 and not an error code, that shouldn't mean that the request was completed?</p> <pre><code>angular.forEach(queue, function (item) { if (item.uid) { d.item = item; $http({ url: BASE_URL + 'upp', method: 'post', data: d }).then(function(res){ if(res.status == 200) { x++; update_progress((x/queue_count)*100); } }); } </code></pre> <p>Reading more on promises atm to see if I can make it work as stated by @josh-strange</p> <p><strong>Edit 2</strong>:</p> <p>So promises was the way to do it, all requests are sent sequentially so the progress bar works as expected, here's the code:</p> <pre><code>var promise = $q.all({}); // Had to init $q.all with an empty obj, 'cause null was trowing errors angular.forEach(queue, function(item){ if (item.uid) { promise = promise.then(function(){ d.item = item; return $http({ url: BASE_URL + 'upp', method: 'post', data: d }).then(function(res){ x++; update_progress((x/queue_count)*100); }); }); } }); promise.then(function(){ end_js_update(); }); </code></pre> <p>Thanks @josh-strange </p>
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    1. CODon't use forEach, manually loop through queue? Not sure that will work either. Async can be such a pain sometimes.
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    2. COYou [cannot](http://stackoverflow.com/questions/13088153/how-to-http-synchronous-call-with-angularjs) make synchronous calls in AngularJS but you can make sequential http calls (Reg 1, then Reg 2, etc..). Let me try to get a Plunker together for you.
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    3. CO[Here](http://plnkr.co/edit/HMccomnJooWpIHFMO4H8) is an VERY simple example of sequential HTTP requests, I will post an answer in a minute with it cleaned up.
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