Had a question related to best practices in iPhone login authentication using asynchronous NSURLConnection.
Since the same delegate is used for logging into a server, how do folks differentiate notifications coming back for an authentication request, versus when you recieve data for subsequent data requests?
Thanks,
Sj
If by authentication, you mean HTTP authentication, then that is not handed back to you as data. It comes back in -connection:didReceiveAuthenticationChallenge:. If you're talking about a higher-level protocol that manages authentication above the HTTP layer, then it's your job to keep track of the current state of your connection.
See Using NSURLConnection for full details on HTTP Auth.
The common pattern to use would be to create a different class for each type of request you have and make it manage the lifetime its own NSURLConnection. It can then send events back to its delegate.
The other method would be to remember all the NSURLConnections you've created and compare them against the first parameter of the delegate callbacks.
Related
I need a mechanism to store and access request specific data in Akka HTTP. Is it possible without sending values around to each actor that is called from the route?
Let's say I want to log performance of all operations, including request id, so I'm able to search logs by request id. So when logging inside actor, it would be great to do something like Request.id.
Note that API does not implement session, since this is a specific service which runs behind main API (which is doing authentication etc).
Is there any library or built in way suitable for this?
Thanks in advance
assume I have an API that gives a JSON response that return an id and a name.
In a mobile application normally I would make an http GET response to get this data in a one time connection with the server and display the results in the app, however if the data changes over time and I want to keep listening to this data whenever it changes how is that possible ?
I have read about sockets and seen the socket_io_client and socket_io packages, but I did not get my head around it yet, is using sockets the only way to achieve this scenario ? or is it possible to do it in a normal http request ?
Thanks for your time
What you need is not an API but a Webhook:
An API can be used from an app to communicate with myapi.com. Through that communication, the API can List, Create, Edit or Delete items. The API needs to be given instructions, though.
Webhooks, on the other hand, are automated calls from myapi.com to an app. Those calls are triggered when a specific event happens on myapi.com. For example, if a new user signs up on myapi.com, the automated call may be configured to ask the app to add a new item to a list.
is using sockets the only way to achieve this scenario ? or is it possible to do it in a normal http request ?
Sockets is only one of the ways to achieve your goal. It is possible to do it using a normal http request. Here, for example, the docs explain how to update data over the internet using HTTP.
From the flutter docs:
In addition to normal HTTP requests, you can connect to servers using WebSockets. WebSockets allow for two-way communication with a server without polling.
You'll find what you need under the networking section.
You should also take a look at the Stream and StreamBuilder classes.
The documentation mentions using FBInstant.player.getSignedPlayerInfoAsync() to get a signature when communicating with a custom backend.
https://developers.facebook.com/docs/games/instant-games/guides/bots-and-server-communication
Can I store the signature in a variable at the start of the app and then just use it throughout all the XMLHttpRequests for the current session?
Or do I need to call it everytime I make an XMLHttpRequest?
You are free to only call it once, however this will not allow you to validate the issued_at time, or to encrypt custom payloads.
I used synchronize method of nsurlconnection for initiating the network connection. Since my system is behind a proxy i want to add the code for challenge response. The problem which i am facing is that the challenge response method is not getting called. is using synchronize method is the problem ?
Do you mean sendSynchronousRequest:returningResponse:error: by "synchronize`?
If so, connection:didReceiveAuthenticationChallenge: is not called for synchronous requests. But you can still provide NSURLCredential / NSURLProtectionSpace and store it into NSURLCredentialStorage before sending the request.
Check Mike's answer here: Can I use NSURLCredentialStorage for HTTP Basic Authentication?
I'm working on a web view that needs to work with only servers I trust (Based on the SSL handshake), and not all of those that Apple approve.
Is there a way to intercept the UIWebView connection so I could control on the request authentication?
When I use the UIWebView method loadRequest: there's no way of getting the SSL challenge (since it's not part of the UIWebViewDelegate protocol).
An alternative is to get the request that the UIWebView is about to send (using the delegate callback webView:shouldStartLoadWithRequest:navigationType:), telling the UIWebView not to load it, and sending the request using NSURLConnection (using its delegation methods for the SSL handshake logic). and when the connection finishes, loading the data it receives into the UIWebView (using the loading method loadData:MIMEType:textEncodingName:baseURL:). This workaround is working for simple sites, but complicated sites (JS, CSS...) might not work.
Thanks!
I had a similar problem of trying to display a web page for which the certificate has expired. I found this post, which showed me how to use a protocol on NSURLRequest, to override the method allowsAnyHTTPSCertificateForHost.
He stresses that this might or might not be accepted by Apple - however for my development this saves me some time.
You may be able to use this technique for your solution.