gmuth/ipp-samples

ipp-client use cases written in java or kotlin with build support for gradle and maven, bonjour discovery

ipp-samples

Sample code written in java and kotlin using my ipp-client library.

Bonjour Discovery

Use jmDNS to discover printers via Bonjour including AirPrint compatible printers.

val jmDns = JmDNS.create()
jmDns.list("_ipp._tcp.local.").forEach {
    val printerName = it.name
    val printerUri = with(it) { URI.create("ipp://$server:$port/${getPropertyString("rp")}") }
    val ippPrinter = IppPrinter(printerUri)
    println("* $printerName")
    println("  $printerUri")
    println("  $ippPrinter")
}
jmDns.close()

Java

Print a pdf file and wait for the printer to finish.

// initialize printer connection and show printer attributes
IppPrinter ippPrinter=new IppPrinter("ipp://colorjet.local/ipp/printer");
  ippPrinter.logDetails();

// print file
File file=new File("my-document.pdf");
IppJob job=ippPrinter.printJob(
  file,
  documentFormat("application/pdf"),
  jobName(file.getName()),
  IppColorMode.Monochrome
);
job.logDetails();

// wait until printer has completed the job
job.waitForTermination();
job.logDetails();

Dependency

    implementation("de.gmuth:ipp-client:2.3")

ipp-samples's Issues

can't no find contentType

I used HP PageWide MFP P57750 - J9V82D run this java samples ， can't find contentType in IppClient.kt:102 ,why?

what should I do?

Exception in thread "main" java.lang.NullPointerException
	at de.gmuth.ipp.client.IppClient.exchange(IppClient.kt:102)
	at de.gmuth.ipp.client.IppClient.exchangeSuccessful(IppClient.kt:67)
	at de.gmuth.ipp.client.IppPrinter.exchangeSuccessful(IppPrinter.kt:250)
	at de.gmuth.ipp.client.IppPrinter.getPrinterAttributes(IppPrinter.kt:140)
	at de.gmuth.ipp.client.IppPrinter.getPrinterAttributes$default(IppPrinter.kt:138)
	at de.gmuth.ipp.client.IppPrinter.updateAllAttributes(IppPrinter.kt:144)
	at de.gmuth.ipp.client.IppPrinter.<init>(IppPrinter.kt:28)
	at de.gmuth.ipp.client.IppPrinter.<init>(IppPrinter.kt:24)
	at de.gmuth.ipp.client.IppPrinter.<init>(IppPrinter.kt:37)
	at ipp.PrinterAttributes.main(PrinterAttributes.java:9)