Question

我正在将我的应用从UIWebView迁移到WKWebView。一切顺利，我正在努力修补它。但是，我现在注意到我无法下载论坛附件。

我正在使用HCDownload，到目前为止我一直都很完美，所以我知道它不是为了这个目的。我相信它的要求，但我无法弄明白。

我知道以下内容：

UIWebView => WKWebView Equivalent
--------------------------------------------------------------
didFailLoadWithError => didFailNavigation
webViewDidFinishLoad => didFinishNavigation
webViewDidStartLoad => didStartProvisionalNavigation
shouldStartLoadWithRequest => decidePolicyForNavigationAction

因此，我正在尝试下面这个：

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {

    NSURLRequest *request = navigationAction.request;
    NSURL *fileURl = [request URL];
    NSString *externalFileExtension = [fileURl pathExtension];
    NSString *internalFileExtension = [[fileURl absoluteString] pathExtension];

    HCDownloadViewController *dlvc = [[HCDownloadViewController alloc] init];
    UINavigationController *vc = [[UINavigationController alloc] initWithRootViewController:dlvc];
    dlvc.delegate = self;
    vc.transitioningDelegate  = self;

    if (navigationAction.navigationType == WKNavigationTypeLinkActivated) {

        //External file extensions
        if ([fileExtensions containsObject:[externalFileExtension lowercaseString]]) {
            [dlvc downloadURL:fileURl userInfo:nil];
            [self presentViewController:vc animated:YES completion:nil];
            [vc release];

            NSLog(@"externalURL is %@", fileURl);
            decisionHandler(WKNavigationActionPolicyCancel);
            return;
        }

        //Internal file links
        if ([fileExtensions containsObject:[internalFileExtension lowercaseString]]) {
            [self presentViewController:vc animated:YES completion:nil];
            [dlvc downloadURL:fileURl userInfo:nil];
            [vc release];

            NSLog(@"internalURL is %@", fileURl);
            decisionHandler(WKNavigationActionPolicyCancel);
            return;

        }
}

它将通过查找文件扩展名来激活我的下载控制器，而是下载index.php，而不是文件。

示例网址：

https://example.com/index.php?app=core&module=attach&section=attach&attach_id=1234=example.zip;

我做错了什么。它在UIWebView之前运行良好，我知道事情的完成方式不同。但是如何从dropbox下载一些东西就好了，但是论坛上的附件文件会变得很糟糕。

任何帮助将不胜感激

Answer 1

嗯，继续我最终的结果，似乎一切正常。

- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
    NSHTTPURLResponse *response = (NSHTTPURLResponse *)navigationResponse.response;
    NSArray *cookies =[NSHTTPCookie cookiesWithResponseHeaderFields:[response allHeaderFields] forURL:response.URL];
    for (NSHTTPCookie *cookie in cookies) {
        [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
    }

    decisionHandler(WKNavigationResponsePolicyAllow);
    //NSLog(@"decidePolicyForNavigationResponse");
}


//Download manager
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {

    NSURLRequest *request = navigationAction.request;
    fileURL = request.URL;

    HCDownloadViewController *dlvc = [[HCDownloadViewController alloc] init];
    UINavigationController *vc = [[UINavigationController alloc] initWithRootViewController:dlvc];
    vc.transitioningDelegate  = self;
    dlvc.delegate = self;

    if (navigationAction.navigationType == WKNavigationTypeLinkActivated) {

        //Internal file links
        NSString *internalFileExtension = fileURL.absoluteString.pathExtension;
        if ([fileExtensions containsObject:[internalFileExtension lowercaseString]]) {

            //Fire download
            [dlvc downloadURL:fileURL userInfo:nil];
            [self presentViewController:vc animated:YES completion:nil];
            [vc release];

            NSLog(@"internalURL is %@", fileURL);
            if (decisionHandler) {
                decisionHandler(WKNavigationActionPolicyCancel);
            }
            return;
        }

        //External file extensions
        NSString *externalFileExtension = fileURL.pathExtension;
        if ([fileExtensions containsObject:[externalFileExtension lowercaseString]]) {

            //Fire download
            [dlvc downloadURL:fileURL userInfo:nil];
            [self presentViewController:vc animated:YES completion:nil];
            [vc release];

            NSLog(@"externalURL is %@", fileURL);
            if (decisionHandler) {
                decisionHandler(WKNavigationActionPolicyCancel);
            }
            return;
        }
    }

    if (decisionHandler) {
        decisionHandler(WKNavigationActionPolicyAllow);
    }
}

Answer 2

您可能正在下载未经授权的页面，因为您的WKWebView和HCDownload实例不像UIWebView那样共享cookie会话。这是WK2过程模型速度和速度的必要权衡。安全改进。

通过实现_WKDownloadDelegate，我added downloading到我的基于WKWebKit的OSX / Swift迷你浏览器。它是一个完全没有文档的私人协议，如El Cap和iOS9。它允许您的导航委托调用decisionHandler(_WKNavigationResponsePolicyBecomeDownload)，以便在您有机会选择/更改文件名后，WebKit将在后台下载。我还没有关于如何在iOS中实现文件选择器的最模糊的想法，也不是App Store审阅者允许使用该协议。但我的应用程序现在可以正确处理从PHP论坛等会话身份验证网站下载。

Answer 3

Swift 4：

ChrisOSX的解决方案也解决了我的问题。我正在尝试在登录到该站点后从站点上的链接下载文档。我使用WKZombie来抓取链接，然后我想使用Alamofire下载文件。我添加了这个

if let httpResponse = navigationResponse.response as? HTTPURLResponse, let url = httpResponse.url {
    let allHeaders = httpResponse.allHeaderFields.reduce([String : String](), { (result, next) -> [String : String] in
    guard let stringKey = next.key as? String, let stringValue = next.value as? String else { return result }
        var buffer = result
        buffer[stringKey] = stringValue
        return buffer
    })
    let cookies = HTTPCookie.cookies(withResponseHeaderFields: allHeaders, for: url)
    for cookie in cookies {
        HTTPCookieStorage.shared.setCookie(cookie)
    }
}

为：

func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void)

在此之后，cookie存储在共享cookie中，我可以在没有Alamofire的情况下下载该文件并更改下载方法。

下载文件WKWebView ios

3 个答案: