mirror of
https://github.com/vector-im/element-ios.git
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126 lines
4.1 KiB
Objective-C
126 lines
4.1 KiB
Objective-C
/*
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Copyright 2016 OpenMarket Ltd
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Copyright 2018 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "MXKAuthenticationRecaptchaWebView.h"
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NSString *kMXKRecaptchaHTMLString = @"<html> \
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<head> \
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<meta name='viewport' content='initial-scale=1.0' /> \
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<script type=\"text/javascript\"> \
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var verifyCallback = function(response) { \
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/* Generic method to make a bridge between JS and the WKWebView*/ \
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var iframe = document.createElement('iframe'); \
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iframe.setAttribute('src', 'js:' + JSON.stringify({'action': 'verifyCallback', 'response': response})); \
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\
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document.documentElement.appendChild(iframe); \
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iframe.parentNode.removeChild(iframe); \
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iframe = null; \
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}; \
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var onloadCallback = function() { \
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grecaptcha.render('recaptcha_widget', { \
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'sitekey' : '%@', \
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'callback': verifyCallback \
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}); \
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}; \
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</script> \
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</head> \
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<body> \
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<div id=\"recaptcha_widget\"></div> \
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<script src=\"https://www.google.com/recaptcha/api.js?onload=onloadCallback&render=explicit\" async defer> \
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</script> \
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</body> \
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</html>";
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@interface MXKAuthenticationRecaptchaWebView () <WKNavigationDelegate>
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{
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// The block called when the reCAPTCHA response is received
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void (^onResponse)(NSString *);
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// Activity indicator
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UIActivityIndicatorView *activityIndicator;
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}
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@end
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@implementation MXKAuthenticationRecaptchaWebView
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- (void)dealloc
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{
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if (activityIndicator)
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{
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[activityIndicator removeFromSuperview];
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activityIndicator = nil;
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}
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}
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- (void)openRecaptchaWidgetWithSiteKey:(NSString*)siteKey fromHomeServer:(NSString*)homeServer callback:(void (^)(NSString *response))callback
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{
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self.navigationDelegate = self;
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onResponse = callback;
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// Add activity indicator
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activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
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activityIndicator.center = self.center;
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[self addSubview:activityIndicator];
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[activityIndicator startAnimating];
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NSString *htmlString = [NSString stringWithFormat:kMXKRecaptchaHTMLString, siteKey];
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[self loadHTMLString:htmlString baseURL:[NSURL URLWithString:homeServer]];
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}
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#pragma mark - WKNavigationDelegate
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- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
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{
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if (activityIndicator)
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{
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[activityIndicator stopAnimating];
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[activityIndicator removeFromSuperview];
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activityIndicator = nil;
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}
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}
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- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
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{
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NSString *urlString = navigationAction.request.URL.absoluteString;
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if ([urlString hasPrefix:@"js:"])
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{
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// Listen only to scheme of the JS-WKWebView bridge
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NSString *jsonString = [[[urlString componentsSeparatedByString:@"js:"] lastObject] stringByRemovingPercentEncoding];
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NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
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NSError *error;
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NSDictionary *parameters = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers
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error:&error];
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if (!error)
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{
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if ([@"verifyCallback" isEqualToString:parameters[@"action"]])
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{
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// Transfer the reCAPTCHA response
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onResponse(parameters[@"response"]);
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}
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}
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decisionHandler(WKNavigationActionPolicyCancel);
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return;
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}
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decisionHandler(WKNavigationActionPolicyAllow);
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}
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@end
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