// matcherFunc matches the handler to the correct API version based on its `accept` header
// TODO: refactor matcher function as server.Config
func matcherFunc(r domain.Route, defaultHandler http.HandlerFunc, ctx domain.IContext, ac domain.IAccessController) func(r *http.Request, rm *mux.RouteMatch) bool {
return func(req *http.Request, rm *mux.RouteMatch) bool {
acceptHeaders := domain.NewAcceptHeadersFromString(req.Header.Get("accept"))
foundHandler := defaultHandler
// try to match a handler to the specified `version` params
// else we will fall back to the default handler
for _, h := range acceptHeaders {
m := h.MediaType
// check if media type is `application/json` type or `application/[*]+json` suffix
if !(m.Type == "application" && (m.SubType == "json" || m.Suffix == "json")) {
continue
}
// if its the right application type, check if a version specified
version, hasVersion := m.Parameters["version"]
if !hasVersion {
continue
}
if handler, ok := r.RouteHandlers[domain.RouteHandlerVersion(version)]; ok {
// found handler for specified version
foundHandler = handler
break
}
}
if ac != nil {
rm.Handler = ac.NewContextHandler(r.Name, foundHandler)
} else {
rm.Handler = foundHandler
}
return true
}
}
func (renderer *Renderer) Render(w http.ResponseWriter, req *http.Request, status int, v interface{}) {
acceptHeaders := domain.NewAcceptHeadersFromString(req.Header.Get("accept"))
renderType := renderer.DefaultRenderType
for _, h := range acceptHeaders {
m := h.MediaType
if m.SubType == JSON || m.Suffix == JSON {
renderType = JSON
break
}
if m.SubType == XML || m.Suffix == XML {
renderType = XML
break
}
if m.SubType == Data || m.Suffix == Data {
renderType = Data
break
}
if m.SubType == Text || m.Suffix == Text {
renderType = Text
break
}
}
switch renderType {
case JSON:
renderer.JSON(w, status, v)
case XML:
renderer.XML(w, status, v)
case Data:
renderer.Data(w, status, v.([]byte))
case Text:
renderer.Text(w, status, v.([]byte))
default:
renderer.Text(w, status, v.([]byte))
}
}
String: "*/*",
Type: "*",
Tree: "",
SubType: "*",
Suffix: "",
Parameters: domain.MediaTypeParams{
"q": "noninteger",
},
}, 1},
},
},
}
for _, test := range tests {
testValue := test.TestValue
expectedResults := test.ExpectedResults
Context(fmt.Sprintf("when `Accept=%v`", testValue), func() {
result := domain.NewAcceptHeadersFromString(testValue)
It("parses OK", func() {
Expect(len(result)).To(Equal(len(expectedResults)))
for i, _ := range expectedResults {
Expect(result[i].MediaType).To(Equal(expectedResults[i].MediaType))
Expect(result[i].QualityFactor).To(Equal(expectedResults[i].QualityFactor))
}
})
})
}
})
})