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Using content-type for choosing the viewer instead of extension #104

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francesco-strazzullo wants to merge 1 commit into from
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Using content-type for choosing the viewer instead of extension #104

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75 changes: 46 additions & 29 deletions PluginLoader.js
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Original file line number Diff line number Diff line change
Expand Up @@ -53,39 +53,56 @@ function loadPlugin(pluginName, callback) {
document.getElementsByTagName('head')[0].appendChild(script);
}

function createXMLHttpRequest(){
var xmlhttp;

if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera,Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}

return xmlhttp;
}

function loadDocument(documentUrl) {
"use strict";

if (documentUrl) {
var extension = documentUrl.split('.').pop(),
Plugin;
extension = extension.toLowerCase();
var xmlhttp = createXMLHttpRequest();

switch (extension) {
case 'odt':
case 'fodt':
case 'ott':
case 'odp':
case 'fodp':
case 'otp':
case 'ods':
case 'fods':
case 'ots':
loadPlugin('./ODFViewerPlugin', function () {
Plugin = ODFViewerPlugin;
});
break;
case 'pdf':
loadPlugin('./PDFViewerPlugin', function () {
Plugin = PDFViewerPlugin;
});
break;
}
xmlhttp.onreadystatechange = function() {
//readystate === 2 --> Headers received!
if (xmlhttp.readyState === 2) {
var extension = this.getResponseHeader('content-type');

var Plugin;

switch (extension) {
case 'application/vnd.oasis.opendocument.text':
case 'application/vnd.oasis.opendocument.presentation':
case 'application/vnd.oasis.opendocument.spreadsheet':
loadPlugin('./ODFViewerPlugin', function() {
Plugin = ODFViewerPlugin;
viewer = new Viewer(new Plugin());
});
break;
case 'application/pdf':
loadPlugin('./PDFViewerPlugin', function() {
Plugin = PDFViewerPlugin;
viewer = new Viewer(new Plugin());
});
break;
}

window.onload = function () {
if (Plugin) {
viewer = new Viewer(new Plugin());
}
};
}
//Abort the download of the document, in this phase we only need the content-type
this.abort();
}
};

xmlhttp.open("GET", documentUrl.substring(1), true);
xmlhttp.send();
}
}