Ionic 4 proxy bug


Hi, i have configured a proxy in the proxy.conf.json file and added it to angular.json.
If i serve the app everything works just fine, but if i use “ionic cordova run android -l” the proxy doesn’t work anymore.
Accually i been annoyed by a few problems like this since ionic 4, where diferents way or trying the app give very different results.
Any walkaround?


As far as I know, as in v3, this proxy was never suppose to work while running cordova no? it was only intended to solve cors problem while running ionic serve


I Don’t think so. If that’s true, I shouldn’t have cross origin messages


Here,, it’s a ionic 3 article that explains that ionic serve and ionic run can give cors errors, so you have to use a proxy. As i said earlier, in Ionic 4 the proxy only works in ionic serve and when i run ionic cordova run the proxy doesn’t work and i have a CORS error :persevere:.

Ionic 4 is a cruel mistress!


Thx for pointing out, I always and still only use the proxy for ionic serve assuming the rest should works as if I publish my app respectively without. Unfortunately I will not be able to help that much then. Maybe you could give a try adding @ionic/cli-plugin-proxy see


Unfortunately @ionic/cli-plugin-proxy doesn’t work either. In general i use ionic serve too, but i’m having a rought time with ionic serve and the ion refresher (Ionic 4 - Ion refresher bug) so i wanted to test the app on ionic run… what a pitty.
Even if i use ionic cordova run browser proxy get all messed up. Instead of http proxy-address/address-you-want, the app is trying of http localhost:8000/proxy-address/address-you-want



Sorry no idea, only thing I could say is that the Angular proxy used in Ionic v4 for ionic serve just works fine, I could confirm that. For ionic run like I said above I don’t know. Good luck, let me know if you find a solution!


Seems like the new Ionic cli version 4.3.0 solved the bug :slight_smile:



I have several issues with the new way to proxy:

  1. I need t define each and every sub URL/folder that I am using in the json instead everything is under one configuration.

Say I have /api as the base and also: “/api/tours” & “/api/tourists”.
I need to define each and every api therwise they will all go to /api request
because the mode is debug it says it converts to that:

http://localhost:8100/api ->
http://localhost:8100/api/tours ->

They all go to the /api request!!!

  1. The requests get empty responses and cause errors:

core.js:14597 ERROR Error: Uncaught (in promise): SyntaxError: Unexpected end of JSON input
SyntaxError: Unexpected end of JSON input
at resolvePromise (zone.js:831)
at resolvePromise (zone.js:788)
at zone.js:892
at ZoneDelegate.push…/node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:423)
at Object.onInvokeTask (core.js:16147)
at ZoneDelegate.push…/node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:422)
at Zone.push…/node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:195)
at drainMicroTaskQueue (zone.js:601)

Please fix that 10x