I am developing with lwuit to Nokia and Blackberry.
I am working with server and connections. If I call to server that I am working, all work fine. But, if I try to call to external url that receive jpg, the connection request is stuck and I get responde code 400.
The connection is failed in function performOperation() of class ConnectionRequest.
Why its happen?
If I call to my server and get image its work fine but when I call to external jpg it's don't work.
Is there any solution to this?
All this happen in simulator.
I don't really understand what you are looking for.
But I think you must check the URL of the image. Also, the class com.sun.lwuit.io.services.ImageDownloadService might be very useful to you.
RIM network connections differ from Nokia/standard J2ME due to all sorts of proprietary behaviors added by RIM. Codename One's IO API hides this complexity, if you don't want to migrate I suggest you read up on RIM's networking APN, its a bit complex for a single stack overflow answer.
Add ";deviceside=true" at the end of your url... like "http://myHost/images/flux.jpg;deviceside=true", for Blackberry
I found the problem. This occurs because i use POST method. I think in case that we dont send parametes but use method POST is occurs to problem with Content-Length in header of http message and this the reason that i recieve error(400 or 411)
Related
I'm having some issues with video requests handled through a special protocol scheme in a NSURLProtocol subclass. Every other resource (images/text) are getting handled correctly, however, when a video request is sent, I only get a call to 'canInitWithRequest' and no follow up. So, my video resource doesn't get resolved. Now, I've looked around and I found no definite solution for this. Some people use instead an embedded HTTP server, but that seems an overkill. Does anyone know if this is a bug or if not, why is this limitation, is there an workaround for it?
A similar issue: Custom NSURLProtocol class for WebView doesn't work when loading video in HTML5 document , but unfortunately without an answer.
#Meda, I was facing the similar issue. Here what I found and hope it is useful to you.
I assume that you are using NSUrlProtocol because you want to intercept the video requests.
I was using web view which makes request for video over HTTP. It goes to NSURLProtocol and makes the request. When it receives the data, webView loads the video rendering plugin (looking at the mime type in HTTP header). The plugin needs the data to come as Partial HTTP response (Response code 206). Further, the plugin does not use NSURLProtocol class but uses network layer below it. So requests that plugin makes, do not go thru NSURLProtocol. Considering this, there could be 2 problems in your case.
1. HTTP server you are using may not be supporting partial responses.
2. HTTP server is not reachable directly (Can you access the video from safari or any other
browser on your device?)
You can verify both the cases by taking network trace. use tcpdump (available on Mac) to take network trace and see what is happening there.
How do I play a track from a SoundCloud URL, which, for example, I got from the xml response from a query
<stream-url>https://api.soundcloud.com/tracks/31164607/stream</stream-url>
I should have thought that it would have been as easy as:
https://api.soundcloud.com/tracks/31164607/stream&client_id=my_client_id
yet I get
<error>401 - Unauthorized</error>
All I want to do is consume it in a Silverlight MediaElement, so all I need is set some url to the MediaElement's Source property.
I've checked an application that I wrote about 2 years ago, and THEN, accessing the stream url was as easy as this for a public track:
http://api.soundcloud.com/tracks/18163056/stream&consumer_key=MY_CONSUMER_KEY
however this no longer seems to work.
For example, all I had to do then in C# was:
MediaElement me = new MediaElement();
me.Source= new Url("http://api.soundcloud.com/tracks/18163056/stream&consumer_key=MY_CONSUMER_KEY");
me.Play();
Any hints would be appreciated.
I had a reply on a Microsoft forum that seems to imply that SoundCloud might not be possible to stream to Windows 8 Metro devices without consuming the whole stream before playback starts - which is quite worrying and would seem to imply that to make authentication possible, it would have to be done entirely in the url querystring insterad of using the header:
(The following reply is the answer to the following question: 'I am able to access an audio stream by http using the MediaElement, however I need to access it via https in which I need to add the oAuth info to the header of the initial request.
How is this done when using a MediaElement, and if it cannot be done, what is the workaround for consuming an audio feed in Metro 8 that requires header authentication to stream?')
"Direct access to the underlying network stream is not currently permitted by the MediaElement. Because of this there is currently no way to modify the header of the HTTP request to include any additional authentication information. That said, you do have control over the URL. You could theoretically setup an HTTP proxy service that translated the HTTP GET request parameters into the necessary oAuth credentials. Keep in mind that this is just a theoretical workaround. You may find different behavior in practice. Another theoretical workaround would be to handle the oAuth yourself via a raw stream socket and pass the retuned media data to the MediaElement via "Set Source" and a "Random Access Stream". Please keep in mind that this method has major limitations. in order to use a "Random Access Stream" with the ME you need to make sure all of the data is available before passing it to the ME."
The proxy service is not scalable for an application that is merely distributed for free as every stream would need to come via the proxy. And the raw stream socket, although getting around this, would mean that playback could not start until the whole file had downloaded - and this goes against all current UX (User Experience) guidelines.
So once again, if anyone has any tips, or info about how the whole authentication thing can be achieved in a querystring instead of using headers, I'd appreciate it!
I'm a little confused about whether you're referring to a public or a private track? If it's a public track, then you shouldn't need to send any authentication information, just your client id.
When I request https://api.soundcloud.com/tracks/31164607/stream?client_id=YOUR_CLIENT_ID then I get a 302 redirect to the proper mp3 stream.
Remember, adding parameters to a URL must start with a ? not &. This could (more than likely) be the reason why you are getting a 401 (SC is not picking up the client_id).
After authentication the link like this
http://api.soundcloud.com/tracks/103229681/stream?consumer_key=d61f17a08f86bfb1dea28539908bc9bf
is working fine. I am using Action Script.
I'm following up on Tom's reply because he calls attention to url character specificity. My HTTP requests randomly started failing today, and I was prefacing my client_Id with a ?. As soon as I changed that single ? to &, it started working. So in my case, SC wasn't picking up my client_Id because I used the wrong character. I think depending on where in the request we're talking about specifically, it's worth noting that differences between ? and & do make a difference.
I'm new to network programming. This is probably a stupid question, would it be okay for my server to be in C++ for my iOS application?
iOS does not care what your server is programmed with. You can use whatever you feel comfortable with. Remember, you aren't going to be sending executable code to the server - you are just going to be sending requests and the server will send a response.
Yes, your server can be written in any way you want, provided you define the correct protocol (method of communication) between your iPhone app (client) and the server.
XML, JSON, HTTP POST or GET's, whatever. It should all work, provided you code both sides correctly.
EDIT
There has been quite a development. The current problem is this:
I compared requests sent from a browser and sent from my app. There have been some differences and I managed to correct most of them. Some are still unfixed, since I haven't figured it out how yet. I am using INDY.
How can i send (or add) cookies into the request?
I tried this:IdHTTP.CookieManager.AddCookie('bakatheme=BrectanTheme',IdHTTP1.URL) but it doesn't work. Also, in INDY help they say that it is supposed to be AddCookie(String, String), but my Delphi only accept (String, TIdURI) - I am not sure if it is the right URI I am calling.
In the Headers I have this code: AcceptEncoding:='gzip,deflate,sdch'; yet when I parse the outgoing request, it states this: AcceptEncoding:gzip,deflate,sdch,identitybut I am certain I don't have "identity" anywhere in the code.
Those are the two things in which my request differs from the browser's. Now, I am getting a 500 Internal Server Error at return, can it be caused by the lack of cookies or the second thing?
Thank you very much.
Haven't exactly tried it myself but here's an example I found about website login using indy
http://www.ciuly.com/delphi/indy/persistent-login-example-for-geocacheing-no-ssl/
Ok. Lets comment:
How can i send (or add) cookies into the request?
You should not do that. Indy handles this for you (but if really want to, there is a TidCookieManager). But it seems to me that you dont know how cookies work. Its not a thing you can add to a request. It cames from the server and it identifies you.
In the Headers I have this code: AcceptEncoding:='gzip,deflate,sdch';
AcceptEnconding tells to the server that it can compact the response using those algorithms. Indy supports gzip,deflate,sdch,identity and indy is updating que header request to add the one you forgot to put.
You should take a look at those links to learn how http works:
W3
Wikipedia
How to get the best possible http connection in an blackberry application? I use the Network Diagnostic tool provided by RIM but most of the time it fails to find any connection while other applications are connected to the internet without a problem.
Is there any other way to find out how to connect to internet?
Try
http://www.versatilemonkey.com/HttpConnectionFactory.java
Hi I had created something to help myself out for the same purpose.. I hope it would be useful for you too.. Check it out at http://www.sameernafdey.com/2009/08/httpconnection-over-bis-wap-10-11-wap.html
Similar to #imMobile I have a library you can try as well here. It is very simple to use.
The HttpRequest should handle all the service book and coverage/transport stuff for you.