Hi, I try to load a local html file with Request Interception but the browser remains desperately empty.

I have created a CEFRequestHandler :

class TestRequestHandler: CEFRequestHandler {
    func onGetResourceRequestHandler(browser: CEFBrowser, frame: CEFFrame, request: CEFRequest, isNavigation: Bool, isDownload: Bool, initiator: String, disableDefault: inout Bool) -> CEFResourceRequestHandler? {
        disableDefault = true
        return TestResourceRequestHandler()
    }
}

a CEFResourceRequestHandler :

class TestResourceRequestHandler: CEFResourceRequestHandler {
    func cookieAccessFilter(browser: CEFBrowser?, frame: CEFFrame?, request: CEFRequest) -> CEFCookieAccessFilter? {
        return nil
    }
    
    func resourceHandler(browser: CEFBrowser?, frame: CEFFrame?, request: CEFRequest) -> CEFResourceHandler? {
        return TestResourceHandler()
    }

    func onResourceLoadComplete(browser: CEFBrowser?, frame: CEFFrame?, request: CEFRequest, response: CEFResponse, status: CEFURLRequestStatus, contentLength: Int64) {
        print("Load Complete")
    }
}

and a CEFResourceHandler :

class TestResourceHandler: CEFResourceHandler {
    var fileData:Data?
    var bytesDone:Int = 0
    
    func onOpenResponseStream(request: CEFRequest, callback: CEFCallback) -> CEFOnOpenResponseStreamAction {
        let fileManager = FileManager.default
        var filePath = Bundle.main.resourcePath!
        let url = request.url!.absoluteString
        let index = url.index(url.startIndex, offsetBy: "http://localhost".characters.count)
        
        filePath += url.substring(from:index)
        if fileManager.fileExists(atPath: filePath) {
            // Open the file
            let file = FileHandle(forReadingAtPath: filePath)
            fileData = file?.readDataToEndOfFile()
            // Close the file
            file?.closeFile()
        } else {
            print("File not found : " + filePath)
        }
        return .handle
    }

    
    func onGetResponseHeaders(response: CEFResponse) -> CEFOnGetResponseHeadersAction {
        if fileData != nil{
            response.status = 200;
            response.statusText = "OK";
            return .continueWithResponseLength(UInt64(fileData!.count))
        }
        return .abort
    }

    
    func onReadResponseData(buffer: UnsafeMutableRawPointer, bufferLength: Int, callback: CEFResourceReadCallback) -> CEFOnReadResponseDataAction {
        let nsData = fileData! as NSData
        let chunkSize = min(fileData!.count - bytesDone, bufferLength)
        buffer.copyMemory(from: nsData.bytes.advanced(by: bytesDone), byteCount: chunkSize)
        bytesDone += chunkSize
        return .read(chunkSize)
    }
    
}

The onResourceLoadComplete is called but nothing is displayed.

I probably forgot something but what ? Do you have a sample code with request intercetion ?

Thank you in advance

Hi, I have a problem with CEFResourceHandler in branch cef_4280. The bufferLength parameter is not set correctly for onReadResponseData.

class TestResourceHandler: CEFResourceHandler { var fileData:Data? var bytesDone:Int = 0

func onOpenResponseStream(request: CEFRequest, callback: CEFCallback) -> CEFOnOpenResponseStreamAction {
    let fileManager = FileManager.default
    var filePath = Bundle.main.resourcePath!
    let url = request.url!.absoluteString
    let index = url.index(url.startIndex, offsetBy: "http://localhost".characters.count)
    
    filePath += url.substring(from:index)
    if fileManager.fileExists(atPath: filePath) {
        // Open the file
        let file = FileHandle(forReadingAtPath: filePath)
        fileData = file?.readDataToEndOfFile()
        // Close the file
        file?.closeFile()
    } else {
        print("File not found : " + filePath)
    }
    return .handle
}


func onGetResponseHeaders(response: CEFResponse) -> CEFOnGetResponseHeadersAction {
    if fileData != nil{
        response.status = 200;
        response.statusText = "OK";
        return .continueWithResponseLength(UInt64(fileData!.count)) // Here value = 96
    }
    return .abort
}


func onReadResponseData(buffer: UnsafeMutableRawPointer, bufferLength: Int, callback: CEFResourceReadCallback) -> CEFOnReadResponseDataAction {
   // Here bufferLength = 65536 expected -> 96
    let nsData = fileData! as NSData
    buffer.copyMemory(from: nsData.bytes.advanced(by: bytesDone), byteCount: bufferLength)
    bytesDone += bufferLength
    if bytesDone == UInt64(fileData!.count) {
        return .complete
    } else {
        return .read(bufferLength)
    }
}

}

Did I forget something? Do you have an example of use?

Thanks

Hi, Thank you for your prompt response. I'm migrating from CEF 2924 to CEF 4280, it's disturbing to have the same parameter in these 2 versions with a different purpose.

Hi, I have a problem with CEFResourceHandler in branch cef_4280. The bufferLength parameter is not set correctly for onReadResponseData.

class TestResourceHandler: CEFResourceHandler { var fileData:Data? var bytesDone:Int = 0

func onOpenResponseStream(request: CEFRequest, callback: CEFCallback) -> CEFOnOpenResponseStreamAction {
    let fileManager = FileManager.default
    var filePath = Bundle.main.resourcePath!
    let url = request.url!.absoluteString
    let index = url.index(url.startIndex, offsetBy: "http://localhost".characters.count)
    
    filePath += url.substring(from:index)
    if fileManager.fileExists(atPath: filePath) {
        // Open the file
        let file = FileHandle(forReadingAtPath: filePath)
        fileData = file?.readDataToEndOfFile()
        // Close the file
        file?.closeFile()
    } else {
        print("File not found : " + filePath)
    }
    return .handle
}


func onGetResponseHeaders(response: CEFResponse) -> CEFOnGetResponseHeadersAction {
    if fileData != nil{
        response.status = 200;
        response.statusText = "OK";
        return .continueWithResponseLength(UInt64(fileData!.count)) // Here value = 96
    }
    return .abort
}


func onReadResponseData(buffer: UnsafeMutableRawPointer, bufferLength: Int, callback: CEFResourceReadCallback) -> CEFOnReadResponseDataAction {
   // Here bufferLength = 65536 expected -> 96
    let nsData = fileData! as NSData
    buffer.copyMemory(from: nsData.bytes.advanced(by: bytesDone), byteCount: bufferLength)
    bytesDone += bufferLength
    if bytesDone == UInt64(fileData!.count) {
        return .complete
    } else {
        return .read(bufferLength)
    }
}

}

Did I forget something? Do you have an example of use?

Thanks

Hello, I tried to debug a plugin using Audit. it does not work? Can't I debug this like a core media IO DAL video plugin?

This is the only way for now https://github.com/kyleneideck/BackgroundMusic/blob/master/DEVELOPING.md#building-and-debugging