[Webkit-unassigned] [Bug 284516] After I used WKWebView to load a local HTML file, I tried to initiate an interface request to an external domain name through Axios, and a cross-domain problem occurred

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=284516

Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|我在使用 WKWebView 加载本地 HTML    |After I used WKWebView to
                   |文件后，尝试通过 Axios              |load a local HTML file, I
                   |发起对外部域名的接口请求，出现了跨域问题        |tried to initiate an
                   |                            |interface request to an
                   |                            |external domain name
                   |                            |through Axios, and a
                   |                            |cross-domain problem
                   |                            |occurred
                 CC|                            |charliew at apple.com,
                   |                            |m_finkel at apple.com,
                   |                            |wilander at apple.com

--- Comment #2 from Alexey Proskuryakov <ap at webkit.org> ---
Google translation of the description:

1 After I used WKWebView to load a local HTML file, I tried to initiate an interface request to an external domain name through Axios, and a cross-domain problem occurred. My local file was loaded through the loadFileURL:allowingReadAccessToURL: method, and the interface requested by Axios was such a domain name as https://fundaccount.chinaclear.cn/api, and the browser returned a cross-domain error . ” What needs to be confirmed is that our server does not support all cross-domain operations and cannot set Access-Control-Allow-Origin 
2 Then I solved this problem by setting allowfileAccessFromFileURLs to YES 
3 But if the iPhone device turns on the lock mode. You can turn on this mode in the settings. At this time, the second step will not work, resulting in a cross-domain error 
4 Now we implement it through WKURLSchemeHandler, and the specific code for custom sheme interception is (void)webView:(WKWebView *)webView startURLSchemeTask:(id<WKURLSchemeTask>)urlSchemeTask {
    NSURL *url = urlSchemeTask.request.URL;
    NSLog(@"jess test%@", url);
    if ([url.pathExtension isEqualToString:@"html"] && [url.host isEqualToString:@"fundaccount.chinaclear.cn"]) {
        NSString* propertyPath = [[NSBundle mainBundle] pathForResource:@"" ofType:@"html" inDirectory:@"asset"];
        NSData *data = [[NSData alloc] initWithContentsOfFile:propertyPath];
        NSMutableDictionary *resHeader = [NSMutableDictionary new];
        [resHeader setValue:@"*" forKey:@"Access-Control-Allow-Origin"];
        [resHeader setValue:@"charset=UTF-8" forKey:@"Content-Type"];
        [resHeader setValue:@"text/html" forKey:@"Content-Type"];
        NSHTTPURLResponse *response = [[NSHTTPURLResponse alloc] initWithURL:url statusCode:200 HTTPVersion:@"HTTP/1.1" headerFields:resHeader];
        [urlSchemeTask didReceiveResponse:response];
        [urlSchemeTask didReceiveData:data];
        [urlSchemeTask didFinish]; This method 
5 This method solves the problem of loading local files across domains. I want to confirm whether this method is supported by Apple to solve the problem of loading local files across domains. 
6 Now, after consulting the documentation, it is shown that this method also has some problems. I hope you can provide an official answer to solve this problem. 
7 I also want to ask about the situation I encountered. It is mainly about the cross-domain problem after setting allowfileAccessFromFileURLs when the phone is in lock mode. Do you know this situation? 
8 I hope you can provide an official solution to the problem I encountered.

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