Full text downloads not working with Uni's proxy

vmarinkov

I am running Zotero 6 on WIndows and use the connector on Firefox. I recently changed employers and noticed that the Zotero connector never works for Full text PDF downloads with my new Uni's proxy even if I have access to the PDF. It always switches to Open-access PDFs even if it shows Full text PDF (e.g. Science Direct) for a few seconds initially.

I looked into the logs but couldn't find any errors. How can I troubleshoot this? Thanks

dstillman

What about on non-ScienceDirect sites? SD should generally work, but they have the most zealous anti-bot protections.

Can you provide a Debug ID from Zotero for SD and non-SD attempts that fail?

vmarinkov

Here are some tests I ran:
SD no proxy (works fine): D1491378590

SD with proxy: D1583690896
SD with proxy: D1511596106
AEAWEB with proxy: D2082172059

On all 3 tests with the proxy it shows Full Text for a second or two and then automatically switches to Open Access. I don't think this has to do with the anti bot protections but somehow Zotero doesn't work through my Uni's proxy.

vmarinkov

Same paper (https://www.sciencedirect.com/science/article/abs/pii/S0014292117301551) as D1583690896 works fine using my previous Uni's proxy - D1116247873

dstillman

We need Debug IDs from Zotero, not the Zotero Connector.

vmarinkov

Here they are:

https://www.sciencedirect.com/science/article/pii/S0014292117301551
- SD with proxy 1 FAIL: D14162002

https://www.sciencedirect.com/science/article/pii/S0304393222001088
- SD with proxy 1 FAIL: D180549137
- SD with proxy 2 WORKING: D189098143

https://www.aeaweb.org/articles?id=10.1257/aer.96.4.1193
- AEAWEB with proxy 1 fail: D425068210
- AEAWEB with proxy 2 WORKING: D977792289

https://www.sciencedirect.com/science/article/pii/S0923753421022146
- SD without proxy WORKING: D2094098067, D1492563480

dstillman

[JavaScript Error: "www-sciencedirect-com.proxy-[…].[…]:443 uses an invalid security certificate.

The certificate is not trusted because the issuer certificate is unknown.
The server might not be sending the appropriate intermediate certificates.
An additional root certificate may need to be imported.

OK, that's easy. Your proxy server is misconfigured. You'll need to report this to your library or IT department to fix. You can send them to this page for the technical details:

https://www.zotero.org/support/kb/incomplete_cert_chain

They can see that the server shows "Chain issues: Incomplete" on the SSL Labs test.

vmarinkov

Thank you! I have let them know

NixMD

I'm having the same issues - The debug output log is: D90389726
[JavaScript Error: "The connection was refused when attempting to contact wss://stream.zotero.org/." {file: "chrome://zotero/content/xpcom/streamer.js" line: 155}]
I'm trying to upload a full-text version on the New England Journal of Medicine. The same problem occurs on the science direct website

dstillman

@NixMD: Same answer as above. Your university's proxy is misconfigured.

(Once this is fixed, ScienceDirect might still fail due to https://forums.zotero.org/discussion/comment/450008/#Comment_450008.)

NixMD

Thanks for letting me know!