2018-08-13 WKWebView 拦截请求头，重新添加请求头信息

WKWebView 拦截请求头，重新添加请求头信息

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    NSLog(@"navigationAction = %@, \n request = %@", navigationAction, navigationAction.request.URL);
    // 禁止图片类型 a标签超链接跳转
    if ([[navigationAction.request.URL absoluteString] containsString:@".jpg"] ||
        [[navigationAction.request.URL absoluteString] containsString:@".jpeg"] ||
        [[navigationAction.request.URL absoluteString] containsString:@".png"] ||
        [[navigationAction.request.URL absoluteString] containsString:@".gif"]) {
        decisionHandler(WKNavigationActionPolicyCancel);
    }
    else if (navigationAction.navigationType == WKNavigationTypeBackForward){
        [webView reload];
        decisionHandler(WKNavigationActionPolicyAllow);
    }
    else{
        // 拦截请求头，重新添加请求头信息
        NSMutableURLRequest *mutableRequest = [navigationAction.request mutableCopy];
        NSDictionary *requestHeaders = navigationAction.request.allHTTPHeaderFields;
        if ([requestHeaders isKindOfClass:[NSDictionary class]]) {
            if (![requestHeaders objectForKey:@"device_id"] ) {
                NSMutableURLRequest *request = [PublicWKWebViewServices setKeyValueForRequestHeader:[mutableRequest.URL absoluteString]];
                [webView loadRequest:request];
                decisionHandler(WKNavigationActionPolicyCancel);
                return ;
            }
        }
        decisionHandler(WKNavigationActionPolicyAllow);
    }
}

参考：
https://www.jianshu.com/p/0183d978eb5c
https://www.jianshu.com/p/21b1f5a2e909
https://www.jianshu.com/p/b0ed73a61ac4
https://blog.csdn.net/yxl123546/article/details/72779017