Dear Appeon Powerbuilder guys,

I'm using PB 2022 (R1) MR 1900 32bit.

During processing the response of a HTTP-POST-Request using a loop, PB crashes unexpectedly during concatenation of the incoming Blob-data.

This is my code:

HTTPClient	lrc_DocEngine

//....some code before....

lrc_DocEngine.AutoReadData = FALSE
li_Err = lrc_DocEngine.SendRequest("POST", ls_URL, blb_Multipart)
IF ( li_Err = 1 ) THEN
	li_HTTP_Status = lrc_DocEngine.GetResponseStatusCode()

	IF (li_HTTP_Status = 200) THEN
		TRY
			li_rc = 1
			DO WHILE (li_rc = 1)
				blb_NextData = Blob("")
				li_rc = lrc_DocEngine.ReadData(blb_NextData, 1024*16)
				blb_RawData += blb_NextData
			LOOP
			
			// THIS LINE IS NEVER REACHED
			ls_ResponseBody = String(blb_RawData, EncodingUTF8!)

		CATCH (RuntimeError lex_Runtime)
			// ... does not throw anytime!

		FINALLY
		END TRY
	END IF
END IF

The cought runtime exception does not throw anytime!

So I commented the concatenation and added some code to write the incoming Blob-data into a file, PB DOESN'T crash.

HTTPClient	lrc_DocEngine

//....some code before....

lrc_DocEngine.AutoReadData = FALSE
li_Err = lrc_DocEngine.SendRequest("POST", ls_URL, blb_Multipart)
IF ( li_Err = 1 ) THEN
	li_HTTP_Status = lrc_DocEngine.GetResponseStatusCode()

	IF (li_HTTP_Status = 200) THEN
		TRY
			ls_Response_Test_File = "C:\TEMP\RESPONSE.DAT"
			ll_FileHdl = FileOpen(ls_Response_Test_File, StreamMode!, Write!, LockWrite!, Replace!, EncodingUTF8!)
			li_rc = 1
			DO WHILE (li_rc = 1)
				blb_NextData = Blob("")
				li_rc = lrc_DocEngine.ReadData(blb_NextData, 1024*16)
				FileWrite(ll_FileHdl, blb_NextData)
				//blb_RawData += blb_NextData
			LOOP
			
			// THIS LINE WOULD BE REACHED (but blb_RawData is empty here)
			ls_ResponseBody = String(blb_RawData, EncodingUTF8!)

		CATCH (RuntimeError lex_Runtime)
			// ... does not throw anytime!

		FINALLY
			FileClose(ll_FileHdl)
		END TRY
	END IF
END IF

The size of the generated file RESPONSE.DAT is approx. ~230 MB. 

Does PB 2022 have limitations regarding to Blob size or is there a know issue regarding to concatenation?

Kind Regards

Martin