[jira] [Comment Edited] (CB-13639) The fetch request has a cross-origin problem

["Lorcan Lai (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CB-13639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16282978#comment-16282978 ] 

Lorcan Lai edited comment on CB-13639 at 12/8/17 3:28 AM:
----------------------------------------------------------

Thank you for [~Sujan12]'s answer. As you said，i needs to add the following header to its response on server-side?

{code:java}
Access-Control-Allow-Origin: *
{code}

That can be solved.
But what I don't understand is:
# cordova uses the file:// protocol(Phonegap wiki says:"The cross-domain security policy does not affect PhoneGap applications. Since the html files are called by webkit with the file:// protocol, the security policy does not apply."),Why did this happen,and I must to set CORS config on server-side?In some cases,because of the security policy, we can't change this part of the server-side Settings.
# I had no problem using Ajax or XMLHttpRequest APIs,why?


was (Author: laishuliang):
Thank you for [~Jan Piotrowski (Sujan)]'s answer. As you said，i needs to add the following header to its response on server-side?

{code:java}
Access-Control-Allow-Origin: *
{code}

That can be solved.
But what I don't understand is:
# cordova uses the file:// protocol(Phonegap wiki says:"The cross-domain security policy does not affect PhoneGap applications. Since the html files are called by webkit with the file:// protocol, the security policy does not apply."),Why did this happen,and I must to set CORS config on server-side?In some cases,because of the security policy, we can't change this part of the server-side Settings.
#I had no problem using Ajax or XMLHttpRequest APIs,why?

> The fetch request has a cross-origin problem
> --------------------------------------------
>
>                 Key: CB-13639
>                 URL: https://issues.apache.org/jira/browse/CB-13639
>             Project: Apache Cordova
>          Issue Type: Bug
>         Environment: # cordova6/cordova7
> # 华为（HUAWEI）畅享5S Android5.1.1
>            Reporter: Lorcan Lai
>              Labels: cross-origin, fetch
>
> I used [fetch](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) to request a service，report "...cross-origin..." problem. And then I try to use Ajax or XMLHttpRequest to request the same service，there's no problem.
> a part of the content in my config.xml, 
> {code:xml}
> <access origin="*">
> <allow-navigation href="http://*/*" />
> <allow-navigation href="https://*/*" />
> <allow-navigation href="data:*" />
> {code}
> Cordova is not good for the fetch request?



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