AppCache - manifest error (4) - google-chrome

Question

I have hard time to debug why the appcache doesn't work for me. On latest chrome I have got the following errors:
Creating Application Cache with manifest http://localhost/BEST/Home/Manifest
(index):1 Application Cache Checking event
(index):1 Application Cache Error event: Manifest fetch failed (4) http://localhost/BEST/Home/Manifest
More specific (from onerror method):
ApplicationCacheErrorEvent {
message: "Manifest fetch failed (4) http://localhost/BEST/Home/Manifest",
status: 4294967295,
url: "http://localhost/BEST/Home/Manifest",
reason: "manifest",
clipboardData: undefined…}
bubbles: false
cancelBubble: false
cancelable: false
clipboardData: undefined
currentTarget: ApplicationCache
defaultPrevented: false
eventPhase: 0
message: "Manifest fetch failed (4) http://localhost/BEST/Home/Manifest"
path: NodeList[0]
reason: "manifest"
returnValue: true
srcElement: ApplicationCache
oncached: null
onchecking: null
ondownloading: null
onerror: function (a,b,c)
onnoupdate: null
onobsolete: null
onprogress: null
onupdateready: null
status: 0
__proto__: ApplicationCache
status: 4294967295
target: ApplicationCache
oncached: null
onchecking: null
ondownloading: null
onerror: function (a,b,c)
onnoupdate: null
onobsolete: null
onprogress: null
onupdateready: nullstatus: 0
__proto__: ApplicationCache
timeStamp: 1425021666357
type: "error"
url: "http://localhost/BEST/Home/Manifest"
__proto__: ApplicationCacheErrorEvent
My manifest is very simple:
CACHE MANIFEST
CACHE:
Content/DataTables-1.10.3/language/polish.json
NETWORK:
*
Even the manifesto didn't help
Manifest file is served by ASP.NET MVC action, but doesn't matter I think.
Just in case the code:
public ActionResult Manifest()
{
//Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);
var text = System.IO.File.ReadAllText(HttpContext.Server.MapPath("../a.appcache"));
return new ContentResult()
{
ContentType = "text/cache-manifest",
Content = text,
ContentEncoding = System.Text.Encoding.UTF8
};
}
[edit]
On Safari on Win I got
Application Cache manifest could not be fetched, because a redirection was attempted.
Maybe here is a problem?
This is what I got from fiddler attached to chrome:
I see, there is a 302, but could it be the problem?
And I doesn't know how to change it to 200.
[edit2]
I set manually the status code in the Manifest action and it started to work:
public ActionResult Manifest()
{
//Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);
var text = System.IO.File.ReadAllText(HttpContext.Server.MapPath("../BEST.appcache"));
Response.StatusCode = 200;
return new ContentResult()
{
ContentType = "text/cache-manifest",
Content = text,
ContentEncoding = System.Text.Encoding.UTF8
};
}
But only temporary... After few tests, now I got different error. The reason this time is set to signature, not manifest:
Application Cache Error event: Failed to parse manifest http://localhost/BEST/Home/Manifest
(index):252
ApplicationCacheErrorEvent {
message: "Failed to parse manifest http://localhost/BEST/Home/Manifest",
status: 0,
url: "",
reason: "signature",
clipboardData: undefined…}
bubbles: false
cancelBubble: false
cancelable: false
clipboardData: undefined
currentTarget: ApplicationCache
defaultPrevented: false
eventPhase: 0
message: "Failed to parse manifest http://localhost/BEST/Home/Manifest"
path: NodeList[0]
reason: "signature"
returnValue: true
srcElement: ApplicationCache
status: 0
target: ApplicationCache
timeStamp: 1425025030583
type: "error"
url: ""
__proto__: ApplicationCacheErrorEvent

Answer 1

The solution was to set the status code to 200 and the no-store header couldn't be defined.