Why is my IOS app rejecting cdvfile:// and file://

问题:

I'm having a problem displaying images downloaded to cordova.file.dataDirectory in my angular/ionic/cordova app.

I'm using cordova-plugin-file and I'm able to download the files, and extract the URLS using .toInternalURL() and/or .toURL(). However the angular list view is rejecting them. I'm using WkWebView for Ios, and my code is working fine on Android (using .toInternalURL() ). I've whitelisted both cdvfile://* and file:///* in the config and in the meta content-security-policy...

I've added screenshots Here's the console screenshot for links generated by .toInternalURL()

Here's the screenshot for links generated by .toURL():

Here's the security policy im using:

<meta http-equiv="Content-Security-Policy" content="default-src * data: cdvfile://* content://* file:///*; style-src 'self' 'unsafe-inline' *; script-src 'self' 'unsafe-inline' 'unsafe-eval' *; media-src *">

回答1:

Ok, so it turns out that my problem was WKWEBVIEW. I had been using it and didn't realize it was the source of my issue.

So to use a stored image path in src attribute, don't use cdvfile:// or file:///. Instead create a path that looks like this:

http://localhost:12344/Library/NoCloud/ho_tylw7Ygc.jpg

Prepend "http://localhost:12344/Library/NoCloud" to entry.fullPath and you're all set to point to your app's dataDirectory.

回答2:

To make it work I had to do the following trick:

1. I added the 'local-filesystem' suffix into url http://localhost:potr/local-filesystem/
2. Then I added the whole path that I had after file:// e.g. http://localhost/:port/local-fileystem//Users/...
3. But to make things work, if you look at the document.location.href, you will see cdvToken parameter. It needs to be added to the url you baked as ?cdvToken=blah-blah-blah

Only afterwards the thing started to work. Note that I use 'local-webserver' npm pacakge as a cordova-labs-local-webserver (version 1.0.0-dev.) Things can be different in other versions.

回答3:

For people using Ionic 3, this did do the trick for me:

import {normalizeURL} from 'ionic-angular';

normalizeURL(cordova.file.dataDirectory + file.fullPath)

Maybe this is more bulletproof, because it relies on cordova.file.dataDirectory rather then a hard coded string