Add the request header validation

analyzer.go

@@ -81,6 +81,8 @@ func (t *Analyzer) Analyze(req *http.Request) error {
 		switch param.In {
 		case "path":
 			err = t.validatePathParameter(pathParams, &param)
+		case "header":
+			err = t.validateHeaderParameter(req, &param)
 		case "body":
 			err = t.validateBodyParameter(req, &param)
 		case "query":
@@ -126,6 +128,15 @@ func (t *Analyzer) validateBodyParameter(req *http.Request, param *spec.Paramete
 	return nil
 }
 
+func (t *Analyzer) validateHeaderParameter(req *http.Request, param *spec.Parameter) error {
+	errs := validate.NewParamValidator(param, strfmt.Default).Validate(req.Header.Get(param.Name))
+	if errs != nil {
+		return errs.AsError()
+	}
+
+	return nil
+}
+
 func (t *Analyzer) validateQueryParameter(req *http.Request, param *spec.Parameter) error {
 	query := req.URL.Query()
 

analyzer_test.go

@@ -148,6 +148,7 @@ func Test_Analyzer_Analyze_with_path_parameters(t *testing.T) {
 	analyzer := NewAnalyzer(specs)
 
 	req, err := http.NewRequest("GET", "/pet/42", nil)
+	req.Header.Set("userID", "some-id")
 	require.NoError(t, err)
 
 	err = analyzer.Analyze(req)
@@ -162,6 +163,7 @@ func Test_Analyzer_Analyze_with_invalid_path_parameters(t *testing.T) {
 	analyzer := NewAnalyzer(specs)
 
 	req, err := http.NewRequest("GET", "/pet/not-a-number", nil)
+	req.Header.Set("userID", "42")
 	require.NoError(t, err)
 
 	err = analyzer.Analyze(req)
@@ -247,3 +249,33 @@ func Test_Analyzer_Analyze_with_missing_formData_field(t *testing.T) {
 	assert.EqualError(t, err, "validation failure list:\n"+
 		"additionalMetadata in formData is required")
 }
+
+func Test_Analyzer_Analyze_with_header(t *testing.T) {
+	specs, err := NewSpecsFromFile("./dataset/petstore.json")
+	require.NoError(t, err)
+
+	analyzer := NewAnalyzer(specs)
+
+	req, err := http.NewRequest("GET", "/pet/32", nil)
+	require.NoError(t, err)
+	req.Header.Set("userID", "42")
+
+	err = analyzer.Analyze(req)
+
+	assert.NoError(t, err)
+}
+
+func Test_Analyzer_Analyze_with_missing_header(t *testing.T) {
+	specs, err := NewSpecsFromFile("./dataset/petstore.json")
+	require.NoError(t, err)
+
+	analyzer := NewAnalyzer(specs)
+
+	req, err := http.NewRequest("GET", "/pet/32", nil)
+	require.NoError(t, err)
+
+	err = analyzer.Analyze(req)
+
+	assert.EqualError(t, err, "validation failure list:\n"+
+		"userID in header is required")
+}

dataset/petstore.json

@@ -248,6 +248,13 @@
                     "application/json"
                 ],
                 "parameters": [
+					{
+						"name": "userID",
+						"in": "header",
+						"description": "",
+						"required": true,
+						"type": "string"
+					},
                     {
                         "name": "petId",
                         "in": "path",