This issue is puzzling to me, as it sounds like it should work. It makes me wonder if there's a possible SSL Certificate "trust" issue....where the frontend (running on Node.js) is not *trusting* the SSL Certificate that your backend is returning. We *have* seen this before, but in the past it was always with a self-signed SSL Cert. We have a couple of general notes on a workaround here: https://wiki.lyrasis.org/display/DSDOC7x/Installing+DSpace#InstallingDSpace-UsingaSelf-SignedSSLCertificatecausestheFrontendtonotbeabletoaccesstheBackend
However, I admit, I'm not 100% sure if this is the issue. As a sidenote, per Mohammed's site, I've tried updating my local copy of Angular UI (running the latest code) by just updating one line of my "environment.common.ts" file to say "host: 'dspace.uobaghdad.edu.iq'". I've then run "yarn start", and my UI comes up on http://localhost:4000/ displaying the public content available at https://dspace.uobaghdad.edu.iq/server/. So, I cannot even reproduce this "no _links section" error if I run in production mode locally. I'm a bit confused what could be going on, but it seems like it might be an SSL cert trust issue or it might be a configuration error. Have you also double checked you are running a supported version of Node.js and Yarn? https://wiki.lyrasis.org/display/DSDOC7x/Installing+DSpace#InstallingDSpace-InstallingtheFrontend(UserInterface) Tim On Monday, October 11, 2021 at 5:06:58 AM UTC-5 jan.b...@gmail.com wrote: > Hi Mohammed, > you have exactly the same problem. > Jan > > On Monday, October 11, 2021 at 11:43:55 AM UTC+2 Mohammed Al-Shammaa wrote: > >> Hi, >> I have installed DSpace 7 successfully, and it was working fine, however, >> suddenly it is giving the "No _links section found" error. I tried to "yarn >> start" and it was run without any errors: >> >> Building production environment >> Angular environment.ts file generated correctly at >> ./src/environments/environment.ts >> >> but the problem still exists. >> >> https://dspace.uobaghdad.edu.iq/ >> >> Any help to solve this issue is really appreciated. >> >> On Monday, 11 October 2021 at 12:19:05 UTC+3 jan.b...@gmail.com wrote: >> >>> To Tim: perhaps I can let you enter on our virtual machine if you agree >>> Jan >>> >>> On Monday, October 11, 2021 at 11:15:08 AM UTC+2 Jan Broulím wrote: >>> >>>> Dear Joel, >>>> I tried different certification authority, but it did not help. DSpace >>>> still works only in dev mode. >>>> But somehow it can be connected - when I was testing it on 2 machines >>>> without SSL, it was working properly. >>>> Thanks >>>> Jan >>>> >>>> On Friday, October 8, 2021 at 1:43:05 PM UTC+2 caju...@gmail.com wrote: >>>> >>>>> Jan and Tim, >>>>> >>>>> I'm going to offer some extra information that might help future >>>>> people. I was (am) testing this on a development server with self-signed >>>>> TLS certificates and that was also causing this error to occur. Since am >>>>> on a development server, I switched everything to SSL=false, and HTTP >>>>> instead of HTTPS and that mostly solved the problems I was having. I will >>>>> pursue the problem later, but I may need to add my organization's >>>>> internal >>>>> Root CA Certificate to my development server and continue testing. >>>>> >>>>> Of course I had to update all of my settings to match (local.cfg, >>>>> environment.dev.ts, etc) >>>>> >>>>> I don't think a LetsEncrypt Cert would cause this problem, but you >>>>> never know. >>>>> >>>>> --Joel Richard >>>>> Smithsonian Libraries and Archives >>>>> >>>>> On Monday, October 4, 2021 at 1:08:06 PM UTC-4 jan.b...@gmail.com >>>>> wrote: >>>>> >>>>>> Hi Tim, >>>>>> >>>>>> the files are identical (I also tried a copy of environment.dev.ts to >>>>>> environment.prod.ts), which did not help. >>>>>> >>>>>> It looks very strange for me, the guide >>>>>> https://wiki.lyrasis.org/display/DSDOC7x/Installing+DSpace#InstallingDSpace-%22No_linkssectionfoundat...%22errorfromUserInterface >>>>>> >>>>>> probably will be useful. >>>>>> >>>>>> Installed on Debian. >>>>>> >>>>>> Jan >>>>>> >>>>>> >>>>>> On Monday, October 4, 2021 at 5:32:04 PM UTC+2 Tim Donohue wrote: >>>>>> >>>>>>> Hi Jan, >>>>>>> >>>>>>> We have a guide for that error here: >>>>>>> https://wiki.lyrasis.org/display/DSDOC7x/Installing+DSpace#InstallingDSpace-%22No_linkssectionfoundat...%22errorfromUserInterface >>>>>>> >>>>>>> That said, your REST API at https://sulis53.zcu.cz/server/ "looks >>>>>>> correct" to me, and you can see that it has a "_links" section in the >>>>>>> response. >>>>>>> >>>>>>> Therefore, I highly suspect something is wrong with your >>>>>>> environment.prod.ts. Are you SURE it's identical to >>>>>>> environment.dev.ts? >>>>>>> Maybe there's a stray comma or odd space or something that is causing >>>>>>> issues when the configuration is read by `yarn start`? When `yarn >>>>>>> start` >>>>>>> runs, does it say it's using environment.prod.ts, or does it have a >>>>>>> message >>>>>>> like "No specific environment file found..." (if it's the latter, that >>>>>>> means it's having issues reading your environment.prod.ts) >>>>>>> >>>>>>> It's not immediately obvious to me what the problem is...which is >>>>>>> why I immediately suspect it might be an invalid config file or similar. >>>>>>> >>>>>>> If you are able to figure out the problem, please do let us know. >>>>>>> That way we can also update our guide about other issues that might >>>>>>> cause >>>>>>> this "No _links section found" error. >>>>>>> >>>>>>> Tim >>>>>>> >>>>>>> On Monday, October 4, 2021 at 10:23:09 AM UTC-5 jan.b...@gmail.com >>>>>>> wrote: >>>>>>> >>>>>>>> Hello, >>>>>>>> >>>>>>>> we are installing DSpace7 and unfortunately have problems, which we >>>>>>>> are not able to explain or even resolve. >>>>>>>> >>>>>>>> Environment file and apache configuration is attached below. >>>>>>>> >>>>>>>> When running "yarn start:dev", it seems to be working, but when >>>>>>>> running "yarn start" (environment.prod.ts and environment.dev.ts are >>>>>>>> the >>>>>>>> same), we always get "no _links section found..." error. >>>>>>>> >>>>>>>> Could you please help us to resolve the problem? What might be the >>>>>>>> difference, which can cause this problem? >>>>>>>> >>>>>>>> You can even check - "No _links section found at >>>>>>>> https://sulis53.zcu.cz/server/api";, but this link is normally >>>>>>>> accessible. >>>>>>>> The testing instance runs here: https://sulis53.zcu.cz: >>>>>>>> >>>>>>>> Thank you >>>>>>>> >>>>>>>> With regards >>>>>>>> >>>>>>>> Jan >>>>>>>> >>>>>>>> >>>>>>>> ------------------------------- >>>>>>>> environment.*.ts: >>>>>>>> >>>>>>>> export const environment = { >>>>>>>> ui: { >>>>>>>> ssl: false, >>>>>>>> host: 'localhost', >>>>>>>> port: 4000, >>>>>>>> nameSpace: '/' >>>>>>>> }, >>>>>>>> rest: { >>>>>>>> ssl: true, >>>>>>>> host: 'sulis53.zcu.cz', >>>>>>>> port: 443, >>>>>>>> nameSpace: '/server' >>>>>>>> } >>>>>>>> }; >>>>>>>> >>>>>>>> >>>>>>>> apache: >>>>>>>> <VirtualHost _default_:443> >>>>>>>> SSLEngine on >>>>>>>> SSLCertificateFile /etc/letsencrypt/live/ >>>>>>>> sulis53.zcu.cz/cert.pem >>>>>>>> SSLCertificateKeyFile /etc/letsencrypt/live/ >>>>>>>> sulis53.zcu.cz/privkey.pem >>>>>>>> >>>>>>>> ProxyPass /server http://localhost:8080/server >>>>>>>> ProxyPassReverse /server http://localhost:8080/server >>>>>>>> >>>>>>>> RequestHeader set X-Forwarded-Proto https >>>>>>>> >>>>>>>> ProxyPass / http://localhost:4000/ >>>>>>>> ProxyPassReverse / http://localhost:4000/ >>>>>>>> >>>>>>>> </VirtualHost> >>>>>>>> >>>>>>> -- All messages to this mailing list should adhere to the Code of Conduct: https://www.lyrasis.org/about/Pages/Code-of-Conduct.aspx --- You received this message because you are subscribed to the Google Groups "DSpace Technical Support" group. 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