CORS issue with cordova-plugin-ionic-webview2.x in Ionic4

[zcd0000]

Ionic Info

Ionic:

   ionic (Ionic CLI)             : 4.4.0 (/usr/local/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.0.0-beta.16
   @angular-devkit/build-angular : 0.10.7
   @angular-devkit/schematics    : 0.7.5
   @angular/cli                  : 7.0.7
   @ionic/angular-toolkit        : 1.2.0

Cordova:

   cordova (Cordova CLI) : 8.1.2 ([email protected])
   Cordova Platforms     : android 7.1.4, ios 4.5.5
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 2.0.3, (and 4 other plugins)

System:

   Android SDK Tools : 26.1.1 (/Users/cundongzhang/Library/Android/sdk)
   ios-deploy        : 1.9.4
   NodeJS            : v8.12.0 (/usr/local/bin/node)
   npm               : 6.4.1
   OS                : macOS
   Xcode             : Xcode 10.1 Build version 10B61

Issues Descriptions

I have installed Nginx reverse proxy server on my computer and configured it to allow CORS.
When my application is opened in Chrome on mac, it can normally finish CORS request without any issues .
But when I deploy it to android device by "cordova run android" command, my application running in ionic-webview doesn't work because of CORS issue. Ionic-webview can normally send "options"
request to my Nginx server, but it has no next response to my server normal "options" response.
The below screenshot displays the network request and response from my device to Nginx server.

The below screenshot is my Nginx server config in nginx.conf file.

[troyanskiy]

Hello @zcd0000
Try to test that #227

Thanks!

[zcd0000]

I found the issue caused by the configuration of add_header 'Access-Control-Allow-Headers' * not work when CORS request is from cordova-plugin-ionic-webview. I must list all header types in this configuration just as the below, that's ok.
add_header 'Access-Control-Allow-Headers' 'Authorization, Expires, Pragma, DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';

[rushabhmakwana-multidots]

@zcd0000 Did you get any solution for this issue?

[yigonglitech]

@zcd0000 Did you get any solution for this issue?

I found the issue caused by the configuration of add_header 'Access-Control-Allow-Headers' * not work when CORS request is from cordova-plugin-ionic-webview. I must list all header types in this configuration just as the below, that's ok.
add_header 'Access-Control-Allow-Headers' 'Authorization, Expires, Pragma, DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';