Added category for CDVWKWebViewEngine to override loadRequest method:…

… we need to set the correct readAccessURL, or WKWebView is not gonna load our updates. Work in progress. #85
nordnet · Apr 6, 2016 · dcf8c6f · dcf8c6f
1 parent 0cdd541
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diff --git a/plugin.xml b/plugin.xml
@@ -146,6 +146,10 @@
     <source-file src="src/ios/Utils/HCPAssetsFolderHelper.m" target-dir="Utils/"/>
     <header-file src="src/ios/Utils/HCPAssetsFolderHelper.h" target-dir="Utils/"/>
 
+    <!-- sources for WKWebViewFix folder -->
+    <source-file src="src/ios/WKWebViewFix/CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.m" target-dir="WKWebViewFix/"/>
+    <header-file src="src/ios/WKWebViewFix/CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.h" target-dir="WKWebViewFix/"/>
+
   </platform>
 
   <platform name="android">

diff --git a/src/ios/WKWebViewFix/CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.h b/src/ios/WKWebViewFix/CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.h
@@ -0,0 +1,17 @@
+//
+//  CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.h
+//
+//  Created by Nikolay Demyankov on 04.04.16.
+//
+
+#if WKWebViewIncluded
+
+#import "CDVWKWebViewEngine.h"
+
+@interface CDVWKWebViewEngine (HCPPlugin_ReadAccessURL)
+
+- (id)loadRequest:(NSURLRequest*)request;
+
+@end
+
+#endif
diff --git a/src/ios/WKWebViewFix/CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.m b/src/ios/WKWebViewFix/CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.m
@@ -0,0 +1,54 @@
+//
+//  CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.m
+//
+//  Created by Nikolay Demyankov on 04.04.16.
+//
+
+#if WKWebViewIncluded
+
+#import "CDVWKWebViewEngine+HCPPlugin_ReadAccessURL.h"
+#import <objc/message.h>
+#import "HCPFilesStructure.h"
+
+#define CDV_WKWEBVIEW_FILE_URL_LOAD_SELECTOR @"loadFileURL:allowingReadAccessToURL:"
+
+@implementation CDVWKWebViewEngine (HCPPlugin_ReadAccessURL)
+
+- (id)loadRequest:(NSURLRequest*)request
+{
+    if ([self canLoadRequest:request]) { // can load, differentiate between file urls and other schemes
+        if (request.URL.fileURL) {
+            SEL wk_sel = NSSelectorFromString(CDV_WKWEBVIEW_FILE_URL_LOAD_SELECTOR);
+
+            // by default we set allowingReadAccessToURL property to the plugin's root folder,
+            // so the WKWebView would load our updates from it.
+            NSURL* readAccessUrl = [HCPFilesStructure pluginRootFolder];
+
+            // if we are loading index page from the bundle - we need to go up in the folder structure, so the next load from the external storage would work
+            if (![request.URL.absoluteString containsString:readAccessUrl.absoluteString]) {
+                readAccessUrl = [[[request.URL URLByDeletingLastPathComponent] URLByDeletingLastPathComponent] URLByDeletingLastPathComponent];
+            }
+
+            return ((id (*)(id, SEL, id, id))objc_msgSend)(self.engineWebView, wk_sel, request.URL, readAccessUrl);
+        } else {
+            return [(WKWebView*)self.engineWebView loadRequest:request];
+        }
+    } else { // can't load, print out error
+        NSString* errorHtml = [NSString stringWithFormat:
+                               @"<!doctype html>"
+                               @"<title>Error</title>"
+                               @"<div style='font-size:2em'>"
+                               @"   <p>The WebView engine '%@' is unable to load the request: %@</p>"
+                               @"   <p>Most likely the cause of the error is that the loading of file urls is not supported in iOS %@.</p>"
+                               @"</div>",
+                               NSStringFromClass([self class]),
+                               [request.URL description],
+                               [[UIDevice currentDevice] systemVersion]
+                               ];
+        return [self loadHTMLString:errorHtml baseURL:nil];
+    }
+}
+
+@end
+
+#endif