Handle nil function input / output (fiorix#131)

Handle nil function input

Author: denysvitali

wsdlgo/encoder.go

@@ -13,6 +13,7 @@ import (
 	"go/parser"
 	"go/token"
 	"io"
+	"log"
 	"net/http"
 	"net/url"
 	"os"
@@ -712,10 +713,14 @@ func (ge *goEncoder) writeSOAPFunc(w io.Writer, d *wsdl.Definitions, op *wsdl.Op
 	retDefaults[len(retDefaults)-1] = "err"
 
 	// Check if we need to prefix the op with a namespace
+	mInput := ge.funcs[op.Name].Input
 	namespacedOpName := op.Name
-	nsSplit := strings.Split(ge.funcs[op.Name].Input.Message, ":")
-	if len(nsSplit) > 1 {
-		namespacedOpName = nsSplit[0] + ":" + namespacedOpName
+
+	if mInput != nil {
+		nsSplit := strings.Split(mInput.Message, ":")
+		if len(nsSplit) > 1 {
+			namespacedOpName = nsSplit[0] + ":" + namespacedOpName
+		}
 	}
 
 	// The response name is always the operation name + "Response" according to specification.
@@ -1362,17 +1367,27 @@ func (ge *goEncoder) genGoStruct(w io.Writer, d *wsdl.Definitions, ct *wsdl.Comp
 
 func (ge *goEncoder) genGoOpStruct(w io.Writer, d *wsdl.Definitions, bo *wsdl.BindingOperation) error {
 	name := goSymbol(bo.Name)
+	function := ge.funcs[name]
 
-	inputMessage := ge.messages[trimns(ge.funcs[bo.Name].Input.Message)]
+	if function.Input == nil {
+		log.Printf("function input is nil! %v is %v", name, function)
+	} else {
+		message := trimns(function.Input.Message)
+		inputMessage := ge.messages[message]
 
-	// No-Op on operations which don't take arguments
-	// (These can be inlined, and don't need to pollute the file)
-	if len(inputMessage.Parts) > 0 {
-		ge.genOpStructMessage(w, d, name, inputMessage)
+		// No-Op on operations which don't take arguments
+		// (These can be inlined, and don't need to pollute the file)
+		if len(inputMessage.Parts) > 0 {
+			ge.genOpStructMessage(w, d, name, inputMessage)
+		}
 	}
 
-	// Output messages are always required
-	ge.genOpStructMessage(w, d, name, ge.messages[trimns(ge.funcs[bo.Name].Output.Message)])
+	if function.Output == nil {
+		log.Printf("function output is nil! %v is %v", name, function)
+	} else {
+		// Output messages are always required
+		ge.genOpStructMessage(w, d, name, ge.messages[trimns(ge.funcs[bo.Name].Output.Message)])
+	}
 
 	return nil
 }