am about to revisit this in depth… but… the last time I dug in there was definitely an XHR load of an html file originating from polymer (from the web component.min.js, actually, as I recall, which I am classifying generically as “polymer”).
As I recall the XHR request was loading html web components from its host (I think it was loading the entire vulcanized html file). If that host url happens to be file:// then that is what it used for the XHR request. The problem is… WKWebView rejects that access… so no-go for the Polymer app. If the page is loaded via an ordinary http request then all is well. The exact same code loading via an Android WebView is fine also. The problem is limited to security restrictions in WKWebView. See the bug link that I posted for more info. On Mon, May 2, 2016 at 12:34 PM, Karl Tiedt <kti...@gmail.com> wrote: > Nothing in polymer appears to reference file:// anything... this sounds > like it may be a Cordova issue? > > -Karl Tiedt > > On Mon, May 2, 2016 at 9:17 AM, Jim Trainor <jim.trainor.kan...@gmail.com> > wrote: > >> Polymer applications fail to load in an iOS WKWebView, as supported by >> Cordova. The root cause of the problem is that WKWebView does not permit >> loading of content via file:. Cordova's support for WKWebView bypasses >> this restriction by implementing a in-app web server to host the static >> content. Polymer fails because the polymer code tries to load a local, >> static, html file, using a file:// url via an XHR request. The file:// XHR >> request is rejected by WKWebView. >> >> This has turned into a blocking issue for publishing Polymer >> applications, using Cordova, on iOS. >> >> Does this sound familiar to anybody? >> >> Is there anyway to cleanly define the URL where Polymer loads elements >> (or whatever is loaded via the file:// XHR)? >> >> Here is the Apache bug: Allow WKWebView to proxy file:// url loading in >> XmlHttpRequest.open >> <https://issues.apache.org/jira/browse/CB-10109?jql=project%20%3D%20CB%20AND%20labels%20%3D%20wkwebview-known-issues> >> >> >> >> >> Follow Polymer on Google+: plus.google.com/107187849809354688692 >> --- >> You received this message because you are subscribed to the Google Groups >> "Polymer" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to polymer-dev+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/polymer-dev/72dda4a2-5447-4dec-a4e7-b075a02927ad%40googlegroups.com >> <https://groups.google.com/d/msgid/polymer-dev/72dda4a2-5447-4dec-a4e7-b075a02927ad%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > Follow Polymer on Google+: plus.google.com/107187849809354688692 --- You received this message because you are subscribed to the Google Groups "Polymer" group. To unsubscribe from this group and stop receiving emails from it, send an email to polymer-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/polymer-dev/CACDv4tDu6JrtF1TQcv_KtB1V_W%3Dfouhtbrv_AV6SaMGeLMTH9Q%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
