Displaying Blob PDF in Edge/IE11

A cross-browser workaround to have an iframe of PDF.js load a blob of a PDF via the iframe URI.

An example of a standard usage case blob URI:

/viewer.html?file=blob:19B579EA-5217-41C6-96E4-5D8DF5A5C70B

File viewer.js:

within function webViewerOpenFileViaURL:

change line from:

if (file && file.lastIndexOf('file:', 0) === 0) {

to:

if (file && file.lastIndexOf('file:', 0) === 0 || file && file.lastIndexOf('blob:', 0) === 0) {

And to further stop the viewer from breaking when the "origin" is behaving in an IE 11/Edge manner:

within function validateFileURL:

change line from:

if (fileOrigin !== viewerOrigin) {

to:

if (fileOrigin != "null" && fileOrigin !== viewerOrigin) {

Now FF, Chrome, IE 11, and Edge all display the PDF in a viewer in the iframe passed via standard blob URI in the URL.

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