Hi,
On Wed, Sep 26, 2012 at 6:40 PM, Gusman <[email protected]> wrote:
> Hi again.
>
> I have implemented NSUrlProtocol to trap http requests and handle them.
>
> It works well but some times i'm getting random exceptions about the client
> being null, Url being null and once got a disposed exception.
>
> It seems like sometimes the protocol is being disposed by the garbage
> collector but I have a reference to the protocol handler and never dispose
> it.
>
You can try adding a dtor and override Dispose, and see if those gets
called (and get the stack trace), this may help you figure out what's going
on.
Rolf
>
> Any idea on how to stop this??
>
> Here is the code of my protocol handler and the instantiation of it:
>
>
> public class ProtocolHandler : NSUrlProtocol
> {
> private NSUrlConnection Connection;
>
> private NSMutableUrlRequest req;
>
> public override NSUrlRequest Request
> {
> get
> {
> return req;
> }
> }
>
> public ProtocolHandler ()
> {
> }
>
> [Export ("initWithRequest:cachedResponse:client:")]
> public ProtocolHandler (NSUrlRequest Request,
> NSCachedUrlResponse
> CachedResponse, NSUrlProtocolClient Client) : base(Request, CachedResponse,
> Client)
> {
> req = (NSMutableUrlRequest)Request.MutableCopy();
> req["X-Protocol-gDocs"] = "Yes";
> }
>
> [Export ("canInitWithRequest:")]
> public static new bool CanInitWithRequest (NSUrlRequest
> request)
> {
> try {
> if (request == null || request.Url == null)
> return false;
>
> if ((request.Url.Scheme == "http" ||
> request.Url.Scheme == "https") &&
> (request.Headers == null || request.Headers ["X-Protocol-gDocs"] == null))
> //<-- random crash, Url is null. ¿?
> return true;
>
> return false;
> } catch {
> return false;
> }
> }
>
> [Export ("canonicalRequestForRequest:")]
> public static new NSUrlRequest GetCanonicalRequest
> (NSUrlRequest
> forRequest)
> {
> return forRequest;
> }
>
> public override void StartLoading ()
> {
> ProtocolConnectionDelegate del = new
> ProtocolConnectionDelegate();
> del.Handler = this;
> this.Connection = new
> NSUrlConnection(this.Request, del);
> }
>
> public override void StopLoading ()
> {
> try {
> this.Connection.Cancel ();
> this.Connection.Dispose ();
> this.Connection = null;
> } catch {
> }
> }
> }
>
>
> ----
>
> and on my AppDelegate:
>
> ---
>
> Class currentHandler;
>
> public override bool FinishedLaunching (UIApplication app,
> NSDictionary options)
> {
>
> //...
>
> currentHandler = new
> Class(typeof(ProtocolHandler));
>
> NSUrlProtocol.RegisterClass(currentHandler);
>
> }
>
>
>
> --
> View this message in context:
> http://monotouch.2284126.n4.nabble.com/Random-crashes-using-NSUrlProtocol-tp4657239.html
> Sent from the MonoTouch mailing list archive at Nabble.com.
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>
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