I got it working finally. So, for sending files to Telegram bot without using curl, you need to do the following:
1. Download Erel's sample project of [B4X] Post multipart requests / file uploads with progress
2. Slightly modify it as shown below (pay attention to my comments in code):
3. All other subs leave unchanged.
4. Enjoy.
1. Download Erel's sample project of [B4X] Post multipart requests / file uploads with progress
2. Slightly modify it as shown below (pay attention to my comments in code):
B4X:
Private Sub Button1_Click
Dim fd As MultipartFileData
fd.Initialize
fd.KeyName = "document" 'DOCUMENT KEY IS USED FOR SENDING GENERAL FILES
fd.Dir = File.DirAssets 'SET YOUR FILE DIRECTORY
fd.FileName = "1.txt" 'SET YOUR FILENAME
Dim m As Map 'ADD A MAP FOR PARAMETERS
m.Initialize 'INIT IT
m.Put("chat_id", 12345678) 'PUT YOUR CHAT ID. ADD OTHER PARAMETERS TO THIS MAP IF NECESSARY
Dim job As HttpJob = CreateMultipartJob("https://api.telegram.org/YOURBOTKEYHERE/sendDocument", m, Array(fd)) 'PUT YOUR BOT KEY HERE. NOTE "sendDocument" METHOD IS USED WITH PARAMETERS MAP
Wait For (job) JobDone (job As HttpJob)
Log(job)
File.Delete(xui.DefaultFolder, job.Tag)
job.Release
End Sub
Public Sub CreateMultipartJob(Link As String, NameValues As Map, Files As List) As HttpJob
Dim boundary As String = "---------------------------1461124740692"
TempCounter = TempCounter + 1
Dim TempFileName As String = "post-" & TempCounter
Dim stream As OutputStream = File.OpenOutput(xui.DefaultFolder, TempFileName, False)
Dim b() As Byte
Dim eol As String = Chr(13) & Chr(10)
Dim empty As Boolean = True
If NameValues <> Null And NameValues.IsInitialized Then
For Each key As String In NameValues.Keys
Dim value As String = NameValues.Get(key)
empty = MultipartStartSection (stream, empty)
Dim s As String = _
$"--${boundary}
Content-Disposition: form-data; name="${key}"
${value}"$
b = s.Replace(CRLF, eol).GetBytes("UTF8")
stream.WriteBytes(b, 0, b.Length)
Next
End If
If Files <> Null And Files.IsInitialized Then
For Each fd As MultipartFileData In Files
empty = MultipartStartSection (stream, empty)
Dim s As String = _
$"--${boundary}
Content-Disposition: form-data; name="${fd.KeyName}"; filename="${fd.FileName}"
Content-Type: ${fd.ContentType}
"$
b = s.Replace(CRLF, eol).GetBytes("UTF8")
stream.WriteBytes(b, 0, b.Length)
Dim in As InputStream = File.OpenInput(fd.Dir, fd.FileName)
File.Copy2(in, stream)
Next
End If
empty = MultipartStartSection (stream, empty)
s = _
$"--${boundary}--
"$
b = s.Replace(CRLF, eol).GetBytes("UTF8")
stream.WriteBytes(b, 0, b.Length)
Dim job As HttpJob
job.Initialize("", Me)
stream.Close
Dim length As Int = File.Size(xui.DefaultFolder, TempFileName)
Dim in As InputStream = File.OpenInput(xui.DefaultFolder, TempFileName)
Dim cin As CountingInputStream
cin.Initialize(in)
Dim req As OkHttpRequest = job.GetRequest
req.InitializePost(Link, cin, length)
req.SetContentType("multipart/form-data; boundary=" & boundary)
'req.SetContentEncoding("UTF8") 'COMMENT OR REMOVE THIS STRING - IT CAUSES ERROR RESPONSE FROM TELEGRAM
'req.RemoveHeaders("Connection") 'IF YOU WANT YOUR REQUEST TO LOOK MORE CURL-LIKE, UNCOMMENT THIS
'req.RemoveHeaders("Accept-Encoding") 'AND THIS
'req.SetHeader("Accept", "*/*") 'AND THIS
TrackProgress(cin, length)
job.Tag = TempFileName
CallSubDelayed2(HttpUtils2Service, "SubmitJob", job)
Return job
End Sub3. All other subs leave unchanged.
4. Enjoy.