Android Question Webview with POSTData and additional headers

drgottjr said:

setting aside the json issue for a minute, exactly how did you implement the httpjob? was there an answer from the server? exactly what was it (show log entry). httpjob is the way to deal with what you're looking for. postdata works.

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Private jo As JavaObject = WebView1
    Try
        jo.RunMethod("postUrl",Array As Object(tempPostUrl,bytesOfPOstRequest))
    Catch
        MsgboxAsync (LastException.Message,"")
    End Try

Job1.PostBytes(tempPostUrl,bytesOfPOstRequest)
    Job1.GetRequest.SetHeader("Content-Type","application/json")
    
    Wait For (Job1) JobDone(job As HttpJob)
    If Job1.Success = True Then
        
        MsgboxAsync(job.GetString,"")
        WebView1.LoadHtml(job.GetString)
    Else
        
    End If

drgottjr said:

first you say "this then returns JSON data that I need to process".
now you talk about images ??? you're expecting images as json data??

if you are trying to mimic a webpage login that returns json data,
forget webview. you want httpjob.

if you are, in fact, logging into a webpage which is expecting posted
login credentials and which then displays images upon successful
login, then you want webview.

technically, it is certainly possible to download an html stream by posting
login credentials and then passing that stream to a webview, but if the
end result is to display images in a webview, what is the point of
accessing the resource with httpjob? just load the url in a webview with
posted login credentials and look at the images.

is bytesOfPOstRequest in the correct format expected by the server?
if the server is yours, you need to echo what was received and what was
expected. if the server isn't yours, you need an echoing test server. there
are some out there. you need to know why you're not logged in.

in your httppost snippet, you don't actually send the request. is this
actual code from your project? or are you paraphrasing?
also, assuming sending the request were actually there, where would
you put it? (before or after setheader?) also, your setheader request
is wrong. content-type has its own version: job1.GetRequest.SetContentType...

in your javaobject snippet, technically, it should work, but you leave
yourself in the dark as to what the server sees. i've used it on my server.

you appear to connect with the server, so i believe the posted data
is not what is expected.

with httpjob (i assume we're talking about okhttp, right?), testing for
success on the return isn't enough. you always need to test for failure.
the empty else block doesn't serve any purpose.

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Do you think an httpjob will be able to display in a webview?
You said "just load the url in a webview with posted login credentials and look at the images.", that is the reason for my post, I have no idea how to do this.

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drgottjr said:

httpjob (by itself) does not have anything to do with a webview. if you take the result of an httpjob (presumably, a string of bytes), you can do whatever you want with it. after the httpjob has completed.
the string of bytes could be anything (a mime type will clarify) if it happens to be something recognizable as html, you can take that string and load it into a webview for display. it is exactly the same as if you had an html file saved and you opened it and read it in as a string and loaded it into a webview. exactly the same. in fact, this happens to be exactly what a webview or any browser does: it gets a string of bytes from a server and renders it as html. httpjob just handles the downloading part. you're on your own after that.
httpjob download resource from server -----> string -------> webview.loadhtml( string )

the "code" you showed representing your try at httpjob was wrong. 1) there was no actual request made and 2)the content-type header was wrong. and 3) i'm guessing you may not know that the headers are set after the request is made. seems strange, i know. so try again and see what you get.

your javaobject snippet: jo.runmethod("postUrl", array .... works fine (i have used such a construct) assuming the posted data is not only correctly formed but is in the form expected by the server. this is where i believe the problem is. which is - of course - the very first comment from erel in his reply. you say - or at least imply - that it's correctly formatted...

so, get the httpjob code straightened out. if the posted data is good, the routine should work.
the javaobject call should work if the posted data is good.
either way, everything seems to point back to what's being posted.

if the server is yours, and you want to set up some temporary guest account, i'm happy to do a test. you can pm if you don't want dozens of people hammering your server.

and regarding your json string, the attached is how you create one in b4x

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