HTML 5 / QuickTime audio caching in Safari on iOS - iphone

I'm desperatly trying to find a solution for a web application that has to run on an iOS-Safari (e.g. on iPad, iPad2 and iPhone 4):
It's a web application I wrote some time ago which lets the user search for and listen to short music samples (MP3s, all from ~100 kB to ~1.5 MB). The audio player is Flash-based, so it doesn't work on iOS-devices at the moment and I'll have to implement an alternative either in HTML 5 or with a "direct" QuickTime-object.
Both my HTML 5- and QuickTime-alternatives for iOS-devices work fine so far, but there's one major problem I can't find a solution to:
Unlike Flash and most HTML 5-capable browsers on Windows Safari on my iPad 2 won't store the audiofiles in the browsercache after loading and playing them - neither with HTML 5 audio-tags nor with a QuickTime-Object. Every time I load an audio file for playback from the server (with JavaScript-Commands, so without changing or reloading the whole page) it's downloaded again completely.
If a user listens to sample A and then to sample B, Safari forgot about having played sample A and downloads the whole MP3 again if I like to listen to it again. On a mobile device with a potentially narrow bandwith this behaviour is out of the question.
Is there a way of storing downloaded audiofiles opened by HTML 5 or QuickTime in Safari's cache so it remembers already having downloaded them - like it caches usual "web-files" like HTML, CSS or JPEG-images, or like Flash stores such objects in its local cache?
My first attempt was trying to use the Application Cache with a manifest file - although this is not really the intended purpose for my application... I don't have a static set of files that I want to have cached or "available offline" - I just want to cache MP3s which the user has played yet.
It should be possible to use a "dynamic manifest": One that is parsed by the Apache PHP module and listing the files played so far from a PHP session - something like this:
session_start();
header("Content-Type: text/cache-manifest, charset=UTF-8");
echo "CACHE MANIFEST\n";
foreach($_SESSION['playedSongs'] as $song)
{
echo $song."\n";
}
So whenever a song is loaded / played, I could access the PHP session with AJAX, insert the filename of the played file and manually update the manifest by calling window.applicationCache.update() or .swapCache().
There are two problems with this:
First of all: It doesn't work. And I didn't even get to the point of trying to use a dynamic manifest:
<!DOCTYPE html>
<html manifest="cache.manifest">
<head>
<title>Test</title>
<script type="text/javascript">
function playStuff(id)
{
if(id == 1)
{
window.document.getElementById("audio").innerHTML = '<audio controls preload="automatic" autobuffer><source src="song01.mp3" type="audio/mp3" /></audio>';
}
else if(id == 2)
{
window.document.getElementById("audio").innerHTML = '<audio controls preload="automatic" autobuffer><source src="song02.mp3" type="audio/mp3" /></audio>';
}
}
</script>
</head>
<body>
<div id="audio"></div><br />
<br />
<input type="button" value="playStuff(1)" onclick="playStuff(1)" />
<input type="button" value="playStuff(2)" onclick="playStuff(2)" />
</body>
</html>
The cache.manifest looks like this:
CACHE MANIFEST
song01.mp3
song02.mp3
and is properly returned from Apache as "text/cache-manifest" by adding
AddType text/cache-manifest manifest
to the .htaccess of this directory.
The Apache-logs clearly show that the Safari (respectively "AppleCoreMedia") doesn't care about the application cache when it comes to audio-files:
Safari itself seems to acknowledge the manifest and indeed preload the files:
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/index2.html HTTP/1.1" 200 2619 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/cache.manifest HTTP/1.1" 200 79 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/cache.manifest?%3E HTTP/1.1" 200 79 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/song02.mp3 HTTP/1.1" 200 120525 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/song01.mp3 HTTP/1.1" 200 120525 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
Up to this point I did nothing but opening my test-application in Safari.
Playing song01.mp3:
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 2 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:29 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:29 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
Playing song2.mp3:
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 2 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:05 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:05 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
Playing song1.mp3 again:
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:40 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:40 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
Playing song2.mp3 again:
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:13 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:13 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
Every file is downloaded again completely when playing it. So "AppleCoreMedia" (whatever this may be exactly, the QuickTime-plugin that is triggered by the HTML 5 audio-element I suppose?) either doesn't have access to the Application Cache or simply just doesn't realize the files in it. So if I switch my iPad to "Airplane Mode" now, Safari is unable to access / load / play the files.
I also tried using a QuickTime-object instead of an HTML 5 audio-tag (as far as I know HTML 5 audio and video in Safari always use QuickTime?) and controlling it with something like:
document.movie1.SetURL('song02.mp3');
Nothing changes, it's just like using HTML 5 audio and everything gets downloaded again when loading/playing it.
And even if this would work there'd still be a problem:
To properly implement that I would have to load the MP3-file in the Application Cache before playing it. When doing this it seems impossible to show a "real" progress: The ProgressEvent that is fired from the Application Cache after updating it doesn't seem to provide any information about data loaded so far and the complete size of a file. It's just "File 1 from 2" and so on, and not a "real" progress where I could determine something like: "100 kB of 1.2 MB loaded" as I can do with the audio-element.
All the other storage-approaches like Web SQL / Web Database or Local Storage are no help either:
I don't see any way of getting the MP3 data into Local Storage or Web Database and/or getting it out again to play it. The HTML 5 Canvas-element has a toDataURL()-function to produce a Base64-encoded representation and use it for storage - the Audio-element doesn't seem to have anything like this.
My last really "dirty" approach was trying to load "manually" Base64-encoded-MP3s with a combination of AJAX and PHP: A PHP-script outputs a Base64-representation of a MP3-file and is loaded by AJAX, so I could store the Base64-representation e.g. as Local Storage or in Web Database:
$infile = 'song01.mp3';
$contents = file_get_contents($infile);
$base64 = base64_encode($contents);
$audio = 'data:audio/mp3;base64,'.$base64;
echo $audio;
I tried using the resulting AJAX responseText as the source-argument in an audio-source-tag. Suprise: It doesn't work in Safari on my iPad 2, the player just fails to load the "file", although this works fine in Chrome on Windows. Possibly a size limitation for Base64-URIs on Safari / iOS?
And again: Even if this was working in iOS/Safari I don't know of a way to determine a real progress from an AJAX-query...
The last thing I was thinking of was not replacing the audio- or source-tags when loading a song but leaving them in the DOM-structure, check if it's already there when a song is loaded and just add a new audio-tag if a song hasn't been loaded yet. Doesn't work...
If you add multiple player-instances dynamically (again no matter if HTML 5 -tags or QuickTime-objects) instead of "overwriting" them, Safari forgets about ever having loaded the first MP3 as soon as you even insert a new audio- or QuickTime-Element into the DOM tree - you don't even have to load / play something in the new instance! Repeated playback without complete reloading of the file just works as long as you don't playback or insert anything else audio / media related. BTW: Just using Audio-objects in JavaScript and "saving" them into an array doesn't work either / doesn't make Safari cache anything.
This produces lots of unnecessary traffic and takes unnecessary long time if you're in a cellular network with a low bandwith!
I'm working at this problem for three days now without even coming close to a solution...
Any ideas?


I'm almost certain that this is by design and can't be overridden; the CoreMedia stuff purposefully streams the file as needed and throws it away without caching it when the player is dismissed. This is due to limited storage, battery life, etc since the vast majority of the time, you load one media file, play it however many times, then get rid of it. Whenever the content-type is a media type this will happen.
Another post referenced the idea of encoding the data in a PNG to get the browser to cache it, but I haven't attempted that.
You might try merging the various audio samples into one file then transmitting the start/stop times for each sample (an index basically); then you can load the file in a single audio player and jump to the necessary location and play for just the specified time. If that location hasn't been downloaded yet, I believe Safari will use range headers to jump forward in the file (but that can depend on exactly what type of container and whether the container has an index).
Another alternative would be using a streaming media server that can dynamically play audio. Just have the stream going when the player is engaged but streaming silence (the right protocol should use minimal bandwidth for this case), then requests for a sample trigger the streaming server to play that sample. Not ideal or terribly efficient unfortunately.


In case anyone's still pulling their hair out over this stuff (I lost a weekend to it recently), Safari on iOS 6 has a Web Audio API.
https://developer.apple.com/technologies/ios6/


Try this trick I have seen on my twitter some weeks ago but never actually got the time to try: Append an iframe, and set the source to the media file URL. It sounds weird, but it was from a very popular JS guy tweet...
Oh and I see it here: How can I autoplay media in iOS >= 4.2.1 Mobile Safari?
Def worth a try

Related

sap 4 hana router logout not working properly

I have a sap trial account and I am developing a sap ui5 app with spring boot backend on cloud foundry. I also have an app router used for authentication/authorization and for access to my app. I have a simple page, index.html, which has a button that calls my spring backend ("/hello") and a logout button on it ("/my/logout").
All the links I give in this post are accessed only through approuter (/index.html, /hello and /debug are all relative paths to "https://approuter-p***trial.cfapps.eu10.hana.ondemand.com").
Here is the chain of events that I am doing and that has me puzzled:
After I login, I can call the spring backend by pushing my button and it returns 200 (OK).
After I logout by pressing the logout button (I am still on the same page, no redirect), I try calling the spring backend again by pressing the button and it returns 401 (OK). I can repeat this many times, it gives 401 (OK).
I try accessing the backend by calling the direct link from another tab in the same browser(https://approuter-p***trial.cfapps.eu10.hana.ondemand.com/hello - it's the same link that gets called when I push my spring button) and I get a 200 - NOK!, I did not login in again...
I go back to the tab that had index.html opened and call the spring backend again by pressing my button - now it returns 200 also (NOK!)
I tried accessing the spring backend link from POSTMAN, no headers/cookies added - I get the same server response I do by calling it from index.html, by the spring button (same situations as above, sometimes 401, sometimes 200 if backend previously accessed directly in browser).
I also checked the token received via a "/debug" backend that prints it, and it seems that after I logout, any call to the spring backend directly from the browser (not from index.html or POSTMAN) receives a new JWT Token, which seems to be valid. The only difference I noticed was that the 200 responses come with the header "X-Frame-Options: DENY" and the 401 responses come with the header "X-Frame-Options: SAMEORIGIN". This was tested with Chrome and IE - both having the same behaviour.
Any ideas why this is happening? My xs-app.json (used by my-xsuaa service and conseqeuntly by approuter) looks like this:
{
"welcomeFile": "index.html",
"authenticationMethod" : "route",
"routes": [{
"source": "/",
"target": "/",
"destination": "app-destination-hello"
}],
"logout": {
"logoutEndpoint": "/my/logout"
},
"destinations": {
"app-destination-hello": {
"logoutPath": "/myrest/logout",
"logoutMethod": "GET"
}
}
}
Thanks!
I will attach some traces from the approuter, maybe it helps. These are the steps I took with the corresponding logs (did not skip any log entry between steps):
I press logout button from index.html:
2018-08-31T15:37:50.63+0300 [APP/PROC/WEB/0] OUT #2.0#2018 08 31 12:37:50:632#+00:00#ERROR#/Handler#########-UTzTjYczINpXSxkJY_QXoWlfSF3dk0O######jlhzhep3#PLAIN##GET request to /my/logout completed with status 401 - Authentication required#
2018-08-31T15:37:50.63+0300 [RTR/7] OUT approuter-p***trial.cfapps.eu10.hana.ondemand.com - [2018-08-31T12:37:50.632+0000] "GET /my/logout HTTP/1.1" 401 0 12 "https://approuter-p***trial.cfapps.eu10.hana.ondemand.com/index.html" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "-" "10.0.137.79:61038" x_forwarded_for:"-" x_forwarded_proto:"https" vcap_request_id:"bb472547-cf0f-407d-6ccb-87d2dd42d4e7" response_time:0.002667543 app_id:"9ceaf8d0-7ee7-4fb2-84d0-05df07af7c01" app_index:"0" x_b3_traceid:"56fc90749079fa0f" x_b3_spanid:"56fc90749079fa0f" x_b3_parentspanid:"-"
2018-08-31T15:37:50.63+0300 [RTR/7] OUT
I press the spring button from index.html (the endpoint name is now /hello2, but it's the same as before) and I receive a 401, which is OK:
2018-08-31T15:37:57.57+0300 [APP/PROC/WEB/0] OUT #2.0#2018 08 31 12:37:57:575#+00:00#ERROR#/Handler#########utCeM-9IrqFW7oEOGkqMtIoUmwgTpZsv######jlhzhk1z#PLAIN##GET request to /hello2 completed with status 401 - Authentication required#
2018-08-31T15:37:57.58+0300 [RTR/4] OUT approuter-p***trial.cfapps.eu10.hana.ondemand.com - [2018-08-31T12:37:57.583+0000] "GET /hello2 HTTP/1.1" 401 0 12 "https://approuter-p***trial.cfapps.eu10.hana.ondemand.com/index.html" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "-" "10.0.137.79:61038" x_forwarded_for:"-" x_forwarded_proto:"https" vcap_request_id:"600551f2-7054-4d08-68aa-75d88f2584e2" response_time:0.003231487 app_id:"9ceaf8d0-7ee7-4fb2-84d0-05df07af7c01" app_index:"0" x_b3_traceid:"25c2df6333a965cf" x_b3_spanid:"25c2df6333a965cf" x_b3_parentspanid:"-"
2018-08-31T15:37:57.58+0300 [RTR/4] OUT
I open the approuter/hello2 link from another browser tab and I receive a 200 (NOK):
2018-08-31T15:38:00.79+0300 [APP/PROC/WEB/0] OUT #2.0#2018 08 31 12:38:00:797#+00:00#INFO#/Auth/OAuth2#########pPyrBRKTJWcfwzc8yP8EExMmQbCfW992######jlhzhmjg#PLAIN##sending page with client-side redirect to https://p***trial.authentication.eu10.hana.ondemand.com/oauth/authorize?response_type=code&client_id=sb-firstapp3cris!t5664&redirect_uri=https%3A%2F%2Fapprouter-p***trial.cfapps.eu10.hana.ondemand.com%2Flogin%2Fcallback#
2018-08-31T15:38:00.80+0300 [RTR/5] OUT approuter-p***trial.cfapps.eu10.hana.ondemand.com - [2018-08-31T12:38:00.801+0000] "GET /hello2 HTTP/1.1" 200 0 483 "https://approuter-p***trial.cfapps.eu10.hana.ondemand.com/hello2" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "-" "10.0.137.79:61038" x_forwarded_for:"-" x_forwarded_proto:"https" vcap_request_id:"5e18d1e8-f7e6-4b21-6f6a-2a7ea386c5cc" response_time:0.003697001 app_id:"9ceaf8d0-7ee7-4fb2-84d0-05df07af7c01" app_index:"0" x_b3_traceid:"89e2fc6581f0c47b" x_b3_spanid:"89e2fc6581f0c47b" x_b3_parentspanid:"-"
2018-08-31T15:38:00.80+0300 [RTR/5] OUT
somehow a login is called automatically (I see a call in the index.html tab, but it is done when I press the logout button, also no reidrect page to ask me for username/password):
2018-08-31T15:38:39.46+0300 [RTR/5] OUT approuter-p***trial.cfapps.eu10.hana.ondemand.com - [2018-08-31T12:38:39.158+0000] "GET /login/callback?code=UL6niGFX3T HTTP/1.1" 302 0 0 "https://p***trial.authentication.eu10.hana.ondemand.com/login" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "-" "10.0.137.79:61038" x_forwarded_for:"-" x_forwarded_proto:"https" vcap_request_id:"307eee0f-123f-46f6-7102-9ef370d66ab5" response_time:0.307257726 app_id:"9ceaf8d0-7ee7-4fb2-84d0-05df07af7c01" app_index:"0" x_b3_traceid:"a9a073166c04301f" x_b3_spanid:"a9a073166c04301f" x_b3_parentspanid:"-"
2018-08-31T15:38:39.46+0300 [RTR/5] OUT
I press my spring button from approuter/index.html and now I receive 200 response here also:
2018-08-31T15:38:39.70+0300 [RTR/1] OUT approuter-p***trial.cfapps.eu10.hana.ondemand.com - [2018-08-31T12:38:39.542+0000] "GET /hello2 HTTP/1.1" 200 0 85 "p***trial.authentication.eu10.hana.ondemand.com/login" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "-" "10.0.137.79:61038" x_forwarded_for:"-" x_forwarded_proto:"https" vcap_request_id:"b6400e34-87c0-47ea-4335-46d9c9348802" response_time:0.158048741 app_id:"9ceaf8d0-7ee7-4fb2-84d0-05df07af7c01" app_index:"0" x_b3_traceid:"eb6dde02e73d9c38" x_b3_spanid:"eb6dde02e73d9c38" x_b3_parentspanid:"-"
2018-08-31T15:38:39.70+0300 [RTR/1] OUT
2018-08-31T15:38:52.91+0300 [RTR/0] OUT approuter-p***trial.cfapps.eu10.hana.ondemand.com - [2018-08-31T12:38:52.897+0000] "GET /hello2 HTTP/1.1" 200 0 85 "approuter-p***trial.cfapps.eu10.hana.ondemand.com/index.html" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "-" "10.0.137.79:61038" x_forwarded_for:"-" x_forwarded_proto:"https" vcap_request_id:"a29c59b9-ba64-4249-74ac-dbf9cf6b1255" response_time:0.014440749 app_id:"9ceaf8d0-7ee7-4fb2-84d0-05df07af7c01" app_index:"0" x_b3_traceid:"b16f601b3276909a" x_b3_spanid:"b16f601b3276909a" x_b3_parentspanid:"-"
2018-08-31T15:38:52.91+0300 [RTR/0] OUT

Given your xs-app.json and the approuter URL I infer that the logout is located behind:
https://approuter-p***trial.cfapps.eu10.hana.ondemand.com/my/logout.
Are you calling this endpoint to logout from the approuter? This should invalidate all your sessions as well as the JWT temporarily hold within the memory of the approuter.
Furthermore, when you access your Spring backend directly you should always receive 4xx error codes because no client actually ever has any JWT to access the spring-protected backend. In addition, the access to the Spring-based backend should be independent from any cookies or sessions because a JWT is used which by design is a stateless protocol. The only session cookie maintained is between your client and the approuter.
For more details on this, please refer to the Extending SAP S/4HANA Book, Chapter 5.

Sometimes "The specified feature has been temporarily disabled for this application"

it sometimes returned :
{"error_code"=>"2000", "error_message"=>"The specified feature has been temporarily disabled for this application", "state"=>"d022a262e11b1a8bebe4bccb86319514e870fb6657b6aee8"}
from facebook when using facebook login
apache_log:
85.135.128.63 - - [08/May/2013:19:07:40 +0200] "GET /users/auth/facebook HTTP/1.1" 302 250 "http://www.itolar.com/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31"
85.135.128.63 - - [08/May/2013:19:07:41 +0200] "GET /users/auth/facebook/callback?error_code=2000&error_message=The+specified+feature+has+been+temporarily+disabled+for+this+application&state=d022a262e11b1a8bebe4bccb86319514e870fb6657b6aee8 HTTP/1.1" 500 728 "http://www.itolar.com/" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31"
But when i tried two different accounts to do same thing, everything works fine
I am using omniauth-facebook on Ruby on Rails
Do anybody know whats wrong?

It sounds like you might be hitting a rate limit. Try making less frequent calls and/or optimizing them (ie via batch calls). Also check App Insights -> Activity & Errors.

How to get some string with several condition

192.168.152.152 - - [22/Jan/2013:10:01:03 +0700] "GET / HTTP/1.1" 200 485 "-" "
Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4"
this is sample of accesslog from server
can you help me please ?
How can i get information from string above ?
i want to get IP, Time, etc
thank you

Ip Whois might have the information you're looking for
http://www.whatismyip.com/ip-tools/ip-whois-lookup/

Google Chrome doesn't perform POST in a Facebook Canvas Tab application

I believe this is a difficult question to answer.
I've configured my facebook application with the following options:
Page Tab URL: https://www.myapp.com.br/
Secure Page Tab URL: https://www.myapp.com.br/
(both are secure urls and use HTTPS protocol)
Browsers like Firefox and Safari are working fine, sending a POST request to the server when I open the Page Tab with http or https protocol.
However, Google Chrome performs a GET request when using facebook with http. This request doesn't contain the signed_request.
I've spent a lot of time trying to fix this and I still don't understand why this is happening. Can anyone explain and provide a solution?
Update (more info)
The application was written with Ruby on Rails. It was deployed with Nginx + Passenger. The following is the configuration of the application with nginx:
server {
listen 80;
listen 443 default ssl;
server_name www.myapp.com.br;
passenger_enabled on;
root /my/app/rails/folder/public;
# workaround to get rid of infinite loops while using ssl
passenger_set_cgi_param HTTP_X_FORWARDED_PROTO https;
}
Rails configuration is to force ssl.
Nginx access log with a Firefox request to the facebook page tab:
201.87.25.128 - - [25/Nov/2011:19:16:47 -0200] "POST / HTTP/1.1" 200 9693 "http://static.ak.facebook.com/platform/page_proxy.php?v=4"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:6.0.2) Gecko/20100101
Firefox/6.0.2"
Nginx access log with a Google Chrome request to the facebook page tab:
201.87.25.128 - - [25/Nov/2011:19:19:07 -0200] "GET / HTTP/1.1" 200 9678 "http://static.ak.facebook.com/platform/page_proxy.php?v=4"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.2
(KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2"
Nginx access log with a Google Chrome request to the facebook SECURE page tab:
201.87.25.128 - - [25/Nov/2011:19:18:43 -0200] "POST / HTTP/1.1" 200 9678 "https://s-static.ak.facebook.com/platform/page_proxy.php?v=4"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.2
(KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2"

Facebook load the canvas in the tab with some accounts

I'm experiencing a weird thing in an apps I'm developping.
The tab is loading the canvas. In the apps parameter I've filled the right path to both canvas and tabs.
Here is the apache log for the app admina account while loading the tab:
172.16.109.9 - - [01/Sep/2011:15:48:30 +0200] "GET / HTTP/1.1" 200 1593 "http://static.ak.facebook.com/platform/page_proxy.php?v=4" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.865.0 Safari/535.2"
I tried with another account, tester of the apps, he load the right file. Here is the apache log :
172.16.109.9 - - [01/Sep/2011:15:52:59 +0200] "POST /tab HTTP/1.1" 200 1314 "_https://s-static.ak.facebook.com/platform/page_proxy.php?v=4" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0.1) Gecko/20100101 Firefox/6.0.1"
Is this a known Facebook glitch ?
Thanks everyone :)

What do you mean by "loading the canvas"?
Is the user redirected to your canvas version or the canvas content is shown inside the page tab, instead of the tab content?
There are some things that come into my mind, but I would like to know what is the problem exactly