下载通过PHP为WKwebview(iOS)生成的服务器文件

Question

我在服务器上有一个php文件，当我通过任何网络浏览器访问它时，它都会生成一个要下载的文件，即使是使用safari。

header('Pragma: public');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Cache-Control: private', false); // required for certain browsers 
header('Content-Type: application/text');
header('Content-Disposition: attachment; filename="'. basename($filename) . '";');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . filesize($filename));
readfile($filename); 

我正在我的应用程序中使用WKwebview，我真正想做的是下载它并将其存储在我的应用沙盒文件夹中。我尝试了多种方法下载该文件，但WKwebview总是下载*.php文件，而不是生成de.php的文件。

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:fileURL]];
NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {

NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:YES error:nil];

NSString *aux= [response suggestedFilename];

//return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
return [documentsDirectoryURL URLByAppendingPathComponent:@"db.bk"];

} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
NSLog(@"File downloaded to: %@", filePath);


}];

[downloadTask resume];

有办法下载吗？(在Objective-c中(

谢谢！

更新：目前，实现此功能时，我可以在wkwebview中看到文本模式的文件，但仍然无法下载：

- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler 

Answer 1

从iOS 14.5，您可以使用WKDownloadDelegate下载响应中的附加文件，并可以提供保存的目标url：

- (void)viewDidLoad {
[super viewDidLoad];

self.webView = [[WKWebView alloc] initWithFrame:self.view.bounds];
self.webView.navigationDelegate = self;

NSURL* url = [NSURL URLWithString: @"https://your-domain.com/download.php"];
NSURLRequest* request = [NSURLRequest requestWithURL: url];
[self.webView loadRequest:request];

[self.view addSubview:self.webView];
}
#pragma mark - WKNavigationDelegate
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(nonnull WKNavigationResponse *)navigationResponse decisionHandler:(nonnull void (^)(WKNavigationResponsePolicy))decisionHandler {
if (navigationResponse.canShowMIMEType) {
decisionHandler(WKNavigationResponsePolicyAllow);
} else {
decisionHandler(WKNavigationResponsePolicyDownload);
}
}
- (void)webView:(WKWebView *)webView navigationResponse:(WKNavigationResponse *)navigationResponse didBecomeDownload:(WKDownload *)download {
download.delegate = self;
}
#pragma mark - WKDownloadDelegate
- (void)download:(WKDownload *)download decideDestinationUsingResponse:(NSURLResponse *)response suggestedFilename:(NSString *)suggestedFilename completionHandler:(void (^)(NSURL * _Nullable))completionHandler {
// Save to Documents
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [documentPath stringByAppendingPathComponent:suggestedFilename];
NSURL* url = [NSURL fileURLWithPath:filePath];

completionHandler(url);
}
- (void)downloadDidFinish:(WKDownload *)download {
// Downloaded
}

对于以前的iOS版本，您应该手动下载返回的文件：

- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(nonnull WKNavigationResponse *)navigationResponse decisionHandler:(nonnull void (^)(WKNavigationResponsePolicy))decisionHandler {
if (navigationResponse.canShowMIMEType) {
decisionHandler(WKNavigationResponsePolicyAllow);
}
else {
NSURL* downloadUrl = navigationResponse.response.URL;
NSURLSessionDataTask* dataTask = [NSURLSession.sharedSession dataTaskWithURL:downloadUrl completionHandler:^(NSData* data, NSURLResponse* response, NSError* error) {
if (data != nil) {
// Save to Documents
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [documentPath stringByAppendingPathComponent:navigationResponse.response.suggestedFilename];
[data writeToFile:filePath atomically:YES];
}
}];
[dataTask resume];

decisionHandler(WKNavigationResponsePolicyCancel);
}
}

Answer 2

根据上面的答案，如果下载需要cookie，或者下载的请求方法是POST，那么使用NSURLSessionDataTask将不起作用。