Add a dynamic header in packager

[itraore-TS]

Hi I am trying to configure a new header in order to connect with POWERCARD from HPS. The ISO8583 format is the following : [ Protocol identification] + [ PowerCARD header ] + [Type of message] + [Bit maps] + [Data fields] so header look like this : [ Protocol identification] + [ PowerCARD header ] where [ Protocol identification] = "ISO" [ PowerCARD header ] = Position Content  1-4 Number of characters in the message.  5 Product code associated with the message. Valid value: ‘2’ = POS  6-10 The version of the POS software.  11-13 In case of rejection of message for wrong format, this field must contain the number of the first erroneous element, otherwise it contains "000" If the TPE has messages waiting to be sent to the server, this field must contain "*".

a sample of header will be ISO0413211111000 where [ISO ] + [ 0413 + 2 + 11111 + 000 ]

please can you assist on the way to configure this so the POS sent the message to be routed on the upstream

[juks]

Hi. You need to use headerFormat parameter to set up the header.

If all of your header values are static, except length, you may set it like so: --headerFormat=length:n:4,data:an:9:206000000

or you can add extra parameter mode (for the 000 and * thing): --headerFormat=length:n:4,data:an:9:206000000,mode:an:9

In the second case you need to add mode method that will return the header value in this section: https://github.com/juks/iso-8583-socket-queue/blob/13048f4ab01e0d4e65e8532d0ef4ec784e4847ae/lib/iso8583/lib/packager/smartVista.js#L353 and implement the logic for your case. But it seems to be impossible now since you do not have this rejection information anywhere.

Looks like this heavy header is set by an upstream not by the client host. Looks really strange.

[itraore-TS]

I run the script as you proposed on option 1 this is what I have in verbose mode

Your environment has been set up for using Node.js 12.16.0 (ia32) and npm.

C:\Users\source\repos\iso-8583-socket-queue>node socketQueue.js --upstreamHost=46.182.6.101 --upstreamPort=9888 --listenHttpPort=8080 --headerFormat=length:n:4,data:an:9:206000000 --vv --logFile=log.txt 2020-02-21 04:13:06 - info: Important: starting... 2020-02-21 04:13:06 - info: Remote host configuration name: powerCardHPS 2020-02-21 04:13:06 - info: Connecting to upstream server 46.182.6.101:9888 2020-02-21 04:13:06 - info: Relay HTTP server is now running on port 8080 2020-02-21 04:13:06 - info: Connected to upstream 46.182.6.101:9888! 2020-02-21 04:13:06 - info: Processing queue [pending 0 / total 0] 2020-02-21 04:13:06 - info: The queue is empty 2020-02-21 04:13:19 - info: New HTTP socket 2020-02-21 04:13:19 - info: Client http:::1:49164 connected 2020-02-21 04:13:19 - info: Client http:::1:49164 sent data 2020-02-21 04:13:19 - info: http:::1:49164: Warning! Failed to parse iso8583 packet. Won't queue!
2020-02-21 04:13:19 - info: Client http:::1:49164 event

I sent the following http curl -H "Content-Type: text/plain" -X POST -d '49534F30323539323932303035303030313230307234854108E1880316343038343630313035343034363334333030303030303030303030303039343830303132303132373130333330303036383731323031323731303333343131333032303132373631303330313635343134343230303335333306373030343030303030303030303030383633303034303030313330303430303030303136303132202038484F54454C2054454E455245202020202020202020202020204E69616D657920202020202020000950393230303336353439353210303039393030303030300025303030323030303030303030303431363030303636303130303331344536343142' http://localhost:8080/raw

[juks]

For this case it takes an option to pass the raw part of client headers as JSON, but there is no such a feature implemented yet.

[itraore-TS]

Hi Thank you for your help I manage to fix the issue it was as yo just a matter of adding a routine in the header generator. This tools is really powerful thank you for bringing it to our hand.

Please close this issue.