Cannot start my own backend API

[G1298192734a]

I can't start my server.Looking forward to your help.

Hi!Dr.Li,I'm a student and I'm following the browser documentation to learn how to use it. firstly,I installed this browser on the windows using conda.I then tried importing a species that was not present on the browser.I enable cors through http-server,this went well. secondly,I tried setuping backend API because I found I can't search genes. I installed mongodb and started,downloaded the backend package through yarn,transferred the data to the mongodb database and went well But when I started my API,an error appeared,that day was Wednesday.I am still stuck in it until now. I don't know much about java but I try to find where the problem is

Thanks!

[lidaof]

Hi @G1298192734a Thanks you for trying the browser! I actually never seen this error before....need to google a little bit. Which node version are you using? can you try node v16?

[G1298192734a]

I'm using node v20 and npm v10，the latest version automatically installed by conda

[G1298192734a]

You are right! After using node16, everything is normal now. You directly helped me solve the problem, which is really great. thanks for your help!

[G1298192734a]

I will continue to try your browser and may bother you if there are any problems in the future.

[lidaof]

Thanks for the update @G1298192734a . Feel free to ask anytime!

[G1298192734a]

@lidaof Hi,Dr.Li!These days I tried embedding the browser,I known there are two ways from #212.

• firstly,using iframe is really convenient.
• But the other method still reports an error. I think I just need to use build-emb in frontend to regenerate the two files epgg.js and epgg.css.But this error is very persistent.Google told me it might be a problem with the typescript version, but that didn't help

[lidaof]

Hi @G1298192734a yes, we are working on a new version with updated packages, still work in progress. Can you try typescript 3.4.5 at your side?

[G1298192734a]

The error is still there，I feel that maybe the program is still using the default typescript, and the one I installed is global.

[G1298192734a]

Not right either

[G1298192734a]

Update typescript to the latest version locally instead of globally，i get the epgg.js and epgg.css. but

[lidaof]

Hi @G1298192734a can you modify your mirror based on this version https://wangftp.wustl.edu/~dli/test/frontend.zip, no need to run npm install

[G1298192734a]

After using the frontend you provided, I can get epgg.js and epgg.css without any problems.But they still can't work, and other js files generated under dist/js can be used. So I feel like I don’t understand the files generated by the script enough.However, my epgg.js is 9.1M and the one in the example is only 2.3M. Is there any other processing?

[lidaof]

Hi @G1298192734a i am not quite sure, I guess probably due to different compress settings...but I used all default settings....what's the error msg in your version?

[G1298192734a]

There is no error message and the program is normal.It's just that it can't be displayed after I fill in the html. When I tried to replace the files in it, I found that it should be a problem with epgg.js.

[G1298192734a]

@lidaof,Hi! I believe there is no error in the build-emb step. And I feel like the epgg.js used for html should be under umd. Could you tell me how umd is generated?

[G1298192734a]

Maybe the error msg you want to see is this

[lidaof]

Hi @G1298192734a thanks for the screenshot...i have no clues so far....sorry, will do some tests on my side.

[G1298192734a]

@lidaof Hello,today I'm really glad that I found some ideas through the browser's error msg. By changing c=t.length in epgg.js to c=t?.length. The screen can be displayed, but the backend data still cannot be read.

[lidaof]

wow, that's nice! for you refGene, did you setup your mongo database etc?

[lidaof]

what's the error msg when start your own backend? did you use node v16 as well?

[G1298192734a]

Just now my backend was still running normally, but when I restarted it reported an error The version of this node is 16.4

[G1298192734a]

Sorry, I killed the wrong task and the running backend was not turned off.

[G1298192734a]

browser error msg is the same as before.

[G1298192734a]

@lidaof Hi,Dr.Li! I just fixed the backend problem by adding an nginx proxy instead of using the local backend directly and couldn't be happier.

Although the final picture is a bit strange, this Genomic Region Locator is transparent.

[lidaof]

interesting! good to know the reverse proxy fixed your problem!

[G1298192734a]

But I think my handling of epgg.js may still be wrong， because I don’t know what I modified.

[G1298192734a]

In addition, I want to import cool files, but it is a bit difficult to use higlass. I wonder if you can give me some suggestions and whether I should open an new issue?

[lidaof]

Hi @G1298192734a for cool files you would need to setup a higlass server, you can check more at https://docs.higlass.io/higlass_server.html

[G1298192734a]

OK，I will try it later. I appreciate your time. Your reply is really helpful for me. All the best.