EZproxy and Omeka and PDF Embed

Please see:

http://omeka.org/forums-legacy/topic/ezproxy-and-omeka-and-pdf-embed

Suddenly I am unable to access the PDF, but if I remove the embedded proxy info from the URL:
http://library.gc.cuny.edu.central.ezproxy.cuny.edu:2048/legacy/items/show/12132
becoming:
http://library.gc.cuny.edu/legacy/items/show/12132
commend out:
storage.adapterOptions.webDir
from config.ini
and allow my workstation access via .htaccess I have no issues, so I know it is not the viewer.

Proxy administrator assures me no changes were made to proxy server IP (my htaccess has that location) or stanza.

Any ideas?

so, this:
http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.html?file=http%3A%2F%2Flibrary.gc.cuny.edu.central.ezproxy.cuny.edu%3A2048%2Flegacy%2Ffiles%2Foriginal%2Fae79250657c9c24931b7329935016700.pdf

does not work

even though this:
storage.adapterOptions.webDir = "http://library.gc.cuny.edu.central.ezproxy.cuny.edu:2048/legacy/files"
is defined in config.ini

and htaccess allows traffic from proxy.

Interestingly, apache is returning 200s:
128.228.0.55 - - [25/Jul/2017:15:49:01 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/locale/locale.properties HTTP/1.1” 200 4314 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.html?file=http%3A%2F%2Flibrary.gc.cuny.edu.central.ezproxy.cuny.edu%3A2048%2Flegacy%2Ffiles%2Foriginal%2Fae79250657c9c24931b7329935016700.pdf” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 4964
128.228.0.55 - - [25/Jul/2017:15:49:01 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-pageUp.png HTTP/1.1” 200 246 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 1877
128.228.0.55 - - [25/Jul/2017:15:49:01 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-pageDown.png HTTP/1.1” 200 238 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 3489
128.228.0.55 - - [25/Jul/2017:15:49:01 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-presentationMode.png HTTP/1.1” 200 321 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 3438
128.228.0.55 - - [25/Jul/2017:15:49:01 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-openFile.png HTTP/1.1” 200 295 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 4879
128.228.0.55 - - [25/Jul/2017:15:49:02 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-print.png HTTP/1.1” 200 257 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 5491
128.228.0.55 - - [25/Jul/2017:15:49:02 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-download.png HTTP/1.1” 200 259 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 1844
128.228.0.55 - - [25/Jul/2017:15:49:02 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-bookmark.png HTTP/1.1” 200 174 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 4973
128.228.0.55 - - [25/Jul/2017:15:49:02 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-secondaryToolbarToggle.png HTTP/1.1” 200 243 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 5426
128.228.0.55 - - [25/Jul/2017:15:49:02 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-zoomOut.png HTTP/1.1” 200 88 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 3706
128.228.0.55 - - [25/Jul/2017:15:49:02 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/locale/en-US/viewer.properties HTTP/1.1” 200 6170 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.html?file=http%3A%2F%2Flibrary.gc.cuny.edu.central.ezproxy.cuny.edu%3A2048%2Flegacy%2Ffiles%2Foriginal%2Fae79250657c9c24931b7329935016700.pdf” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 5921
128.228.0.55 - - [25/Jul/2017:15:49:02 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-zoomIn.png HTTP/1.1” 200 136 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 1215
128.228.0.55 - - [25/Jul/2017:15:49:02 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/images/toolbarButton-menuArrows.png HTTP/1.1” 200 108 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.css” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 3445
128.228.0.55 - - [25/Jul/2017:15:49:01 -0400] “GET /legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/build/pdf.worker.js HTTP/1.1” 200 1684349 “http://library.gc.cuny.edu/legacy/plugins/PdfEmbed/views/shared/pdf-embed-js/web/viewer.html?file=http%3A%2F%2Flibrary.gc.cuny.edu.central.ezproxy.cuny.edu%3A2048%2Flegacy%2Ffiles%2Foriginal%2Fae79250657c9c24931b7329935016700.pdf” “Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0” 5918

Discovered it is a browser issue, so maybe the PDF Embed plugin?

It only works in IE, not FF, Chrome, Opera, Edge or Safari.

I changed the setting from PDF.js to the Object (uses the browser’s native PDF viewer) option, but only in Chrome, Opera, IE and Edge (no FF) on Windows and all browsers on IOS.

Solutions seem to range from changing things on the server (apache) to using a different viewer configuration.