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joekarma/binary-transport.js

Last active May 27, 2018 18:33
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Automatically generate zip file of HealthLink BC's MHSU services in various formats. Uses binary ajax transport to preserve encoding.
Raw
binary-transport.js
/**
*
* jquery.binarytransport.js
*
* @description. jQuery ajax transport for making binary data type requests.
* @version 1.0
* @author Henry Algus <[email protected]>
*
*/
// use this transport for "binary" data type
$.ajaxTransport("+binary", function(options, originalOptions, jqXHR){
// check for conditions and support for blob / arraybuffer response type
if (window.FormData && ((options.dataType && (options.dataType == 'binary')) || (options.data && ((window.ArrayBuffer && options.data instanceof ArrayBuffer) || (window.Blob && options.data instanceof Blob)))))
{
return {
// create new XMLHttpRequest
send: function(headers, callback){
// setup all variables
var xhr = new XMLHttpRequest(),
url = options.url,
type = options.type,
async = options.async || true,
// blob or arraybuffer. Default is blob
dataType = options.responseType || "blob",
data = options.data || null,
username = options.username || null,
password = options.password || null;
xhr.addEventListener('load', function(){
var data = {};
data[options.dataType] = xhr.response;
// make callback and send data
callback(xhr.status, xhr.statusText, data, xhr.getAllResponseHeaders());
});
xhr.open(type, url, async, username, password);
// setup custom headers
for (var i in headers ) {
xhr.setRequestHeader(i, headers[i] );
}
xhr.responseType = dataType;
xhr.send(data);
},
abort: function(){
jqXHR.abort();
}
};
}
});
Raw
index.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Download Zip File</title>
<style>
body {
background-color: #white;
text-align: center;
margin: 2em;
}
a {
color: beige;
text-decoration: none;
color: skyblue;
font-family: Sunflower;
text-align: center;
font-size: 2em;
line-height: 1.4em;
text-decoration: underline;
}
a:hover {
background-color: #444;
text-decoration: none;
}
#loader {
display: none;
}
.loading {
color: silver;
cursor: default;
text-decoration: none;
pointer-events: none;
}
.loading #loader {
display: block;
margin: 10px auto;
vertical-align: middle;
width: 1em; height: 1em;
left: 0; top: 0;
}
</style>
<link href="https://fonts.googleapis.com/css?family=Sunflower:300" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.8/FileSaver.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.1/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="binary-transport.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.1.5/jszip.min.js"></script>
</head>
<body>
<a href="javascript:void(0);" id="download-zip-file">Click here to download a zip file of DataBC's MHSU information <img id="loader" src="three-dots.svg" width="20" height="20"></a>
<script src="script.js"></script>
</body>
</html>
Raw
script.js
function downloadZipFileOfHealthServices() {
var urls = [
"https://catalogue.data.gov.bc.ca/dataset/2e469ff2-dadb-45ea-af9d-f5683a4b9465/resource/ff7254e9-2a60-467b-bc90-18b5b94e7aef/download/healthlinkbc-mhsu-health-services.csv",
"https://catalogue.data.gov.bc.ca/dataset/2e469ff2-dadb-45ea-af9d-f5683a4b9465/resource/de425d68-a87f-44ce-ab4d-fcb514c04975/download/mental-health.csv",
"https://catalogue.data.gov.bc.ca/dataset/2e469ff2-dadb-45ea-af9d-f5683a4b9465/resource/48901888-a10f-418b-9172-bee09ecd6725/download/mental-health.kml"
];
downloadUrlsAsZip(createZipFileNameForHealthServices(), urls);
}
function createZipFileNameForHealthServices() {
var d = new Date;
return "mhsu_services_from_databc_" + moment().format("YYYYMMDD_HHmm") + ".zip"
}
function downloadUrlsAsZip(fileName, urls) {
jQuery("#download-zip-file").addClass("loading");
jQuery.when.apply(
jQuery,
urls.map(function(u) {
var result = new jQuery.Deferred;
var fileName = u.match(/\/([^\/]+)$/)[1];
jQuery.ajax({
url: u,
type: "GET",
dataType: "binary",
processData: false,
success: function(data) {
result.resolve({"fileName" : fileName, "data" : data});
}
});
return result;
})
).then(
function() {
var zip = new JSZip();
[].map.call(arguments, function(a) {
zip.file(a.fileName, a.data);
});
zip.generateAsync({type:"blob"})
.then(function(content) {
jQuery("#download-zip-file").removeClass("loading");
saveAs(content, fileName);
});
}
);
}
jQuery("#download-zip-file").click(downloadZipFileOfHealthServices)
Display the source blob
Display the rendered blob
Raw
three-dots.svg
<!-- By Sam Herbert (@sherb), for everyone. More @ http://goo.gl/7AJzbL -->
<svg width="120" height="30" viewBox="0 0 120 30" xmlns="http://www.w3.org/2000/svg" fill="skyblue">
<circle cx="15" cy="15" r="15">
<animate attributeName="r" from="15" to="15"
begin="0s" dur="0.8s"
values="15;9;15" calcMode="linear"
repeatCount="indefinite" />
<animate attributeName="fill-opacity" from="1" to="1"
begin="0s" dur="0.8s"
values="1;.5;1" calcMode="linear"
repeatCount="indefinite" />
</circle>
<circle cx="60" cy="15" r="9" fill-opacity="0.3">
<animate attributeName="r" from="9" to="9"
begin="0s" dur="0.8s"
values="9;15;9" calcMode="linear"
repeatCount="indefinite" />
<animate attributeName="fill-opacity" from="0.5" to="0.5"
begin="0s" dur="0.8s"
values=".5;1;.5" calcMode="linear"
repeatCount="indefinite" />
</circle>
<circle cx="105" cy="15" r="15">
<animate attributeName="r" from="15" to="15"
begin="0s" dur="0.8s"
values="15;9;15" calcMode="linear"
repeatCount="indefinite" />
<animate attributeName="fill-opacity" from="1" to="1"
begin="0s" dur="0.8s"
values="1;.5;1" calcMode="linear"
repeatCount="indefinite" />
</circle>
</svg>
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