git.iko.soy/elk
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elk/libraries/Native/Signal/Http.js
61 lines 2.0 kB history raw
1Elm.Native.Http = {};
2Elm.Native.Http.make = function(elm) {
4 elm.Native = elm.Native || {};
5 elm.Native.Http = elm.Native.Http || {};
6 if (elm.Native.Http.values) return elm.Native.Http.values;
9 var JS = Elm.JavaScript.make(elm);
10 var List = Elm.List.make(elm);
11 var Signal = Elm.Signal.make(elm);
14 function registerReq(queue,responses) { return function(req) {
15 if (req.url.ctor !== '[]') { sendReq(queue,responses,req); }
16 };
17 }
19 function updateQueue(queue,responses) {
20 if (queue.length > 0) {
21 elm.notify(responses.id, queue[0].value);
22 if (queue[0].value.ctor !== 'Waiting') {
23 queue.shift();
24 setTimeout(function() { updateQueue(queue,responses); }, 0);
25 }
26 }
27 }
29 function sendReq(queue,responses,req) {
30 var response = { value: { ctor:'Waiting' } };
31 queue.push(response);
33 var request = null;
34 if (window.ActiveXObject) { request = new ActiveXObject("Microsoft.XMLHTTP"); }
35 if (window.XMLHttpRequest) { request = new XMLHttpRequest(); }
36 request.onreadystatechange = function(e) {
37 if (request.readyState === 4) {
38 response.value = (request.status >= 200 && request.status < 300 ?
39 { ctor:'Success', _0:JS.toString(request.responseText) } :
40 { ctor:'Failure', _0:request.status, _1:JS.toString(request.statusText) });
41 setTimeout(function() { updateQueue(queue,responses); }, 0);
42 }
43 };
44 request.open(JS.fromString(req.verb), JS.fromString(req.url), true);
45 function setHeader(pair) {
46 request.setRequestHeader( JS.fromString(pair._0), JS.fromString(pair._1) );
47 }
48 List.map(setHeader)(req.headers);
49 request.send(JS.fromString(req.body));
50 }
52 function send(requests) {
53 var responses = Signal.constant(elm.Http.values.Waiting);
54 var sender = A2( Signal.lift, registerReq([],responses), requests );
55 function f(x) { return function(y) { return x; } }
56 return A3( Signal.lift2, f, responses, sender );
57 }
59 return elm.Native.Http.values = {send:send};
61};