A working proxy exists.

proxy/handleprintjob.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"ippserver/packages/ipp"
+	"net/http"
+	"net/url"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const printerURI = "brn30055cb5e3ae.local:631/ipp/print"
+
+func handlePrintJob(r *ipp.Request, byteStream io.Reader, requestID uint32) *ipp.Response {
+
+	// This request is what will be sent to the real printer
+	request := ipp.NewRequest(ipp.PrintJob, requestID)
+	request.AddOperatonAttribute(ipp.NewCharSetValue("attributes-charset", "utf-8"))
+	request.AddOperatonAttribute(ipp.NewNaturalLanguage("attributes-natural-language", "en"))
+	request.AddOperatonAttribute(ipp.NewURIValue("printer-uri", "ipp://"+printerURI))
+	request.AddOperatonAttribute(r.GetAttribute("requesting-user-name"))
+	request.AddOperatonAttribute(r.GetAttribute("job-name"))
+	request.AddOperatonAttribute(ipp.NewMimeMediaType("document-format", "image/pwg-raster"))
+
+	request.AddJobAttribute(r.GetAttribute("sides"))
+	request.AddJobAttribute(r.GetAttribute("media"))
+	request.AddJobAttribute(r.GetAttribute("print-color-mode"))
+	request.AddJobAttribute(r.GetAttribute("printer-resolution"))
+	request.AddJobAttribute(r.GetAttribute("output-bin"))
+	log.Infof("Downstream request\n%v\n", request)
+
+	downStreamRequest := request.Marshal()
+	b := bytes.NewBuffer(downStreamRequest)
+
+	mr := io.MultiReader(b, byteStream)
+	downStreamResponse, err := http.Post("http://"+"brn30055cb5e3ae.local:631/ipp/print", "application/ipp", mr)
+	if err != nil {
+		fmt.Print(err)
+	}
+
+	rb := ipp.NewResponse(0, 0)
+	rb.UnMarshal(downStreamResponse.Body)
+	log.Infof("Downstream response\n%v\n", rb)
+
+	response := ipp.NewResponse(ipp.SuccessfulOk, r.RequestID())
+	response.AddOperatonAttribute(ipp.NewCharSetValue("attributes-charset", "utf-8"))
+	response.AddOperatonAttribute(ipp.NewNaturalLanguage("attributes-natural-language", "en"))
+	jua := rb.GetAttribute("job-uri").(*ipp.URIValue)
+	if jua != nil {
+		u, err := url.Parse(jua.Value())
+		if err != nil {
+			log.Error("could not parse job-uri")
+		}
+		l := strings.Split(u.Path, "/")
+		j := l[len(l)-1]
+
+		joburi := r.GetAttribute("printer-uri").(*ipp.URIValue).Value() + "/" + j
+		log.Infof(">>>>>>>>>>>>>>>>>>>>>>joburi: %v", joburi)
+		response.AddJobAttribute(ipp.NewURIValue("job-uri", joburi))
+	}
+	response.AddJobAttribute(rb.GetAttribute("job-id"))
+	response.AddJobAttribute(rb.GetAttribute("job-state"))
+	response.AddJobAttribute(rb.GetAttribute("job-state-reasons"))
+
+	return response
+}