// Marshal converts an object to JSONP.
func (c *JsonPCodec) Marshal(object interface{}, options map[string]interface{}) ([]byte, error) {
if len(options) == 0 {
return nil, ErrorMissingCallback
}
json, err := jsonEncoding.Marshal(object)
if err != nil {
return nil, err
}
// #codec-context-options
// the assumption is options[0] is the callback parameter,
// and options[1] is the client-context (NB: not *Context) string.
var callbackFunctionName string
var callbackString string
var clientContextString string
var ok bool
if callbackFunctionName, ok = options[constants.OptionKeyClientCallback].(string); !ok {
panic("stretchrcom/codecs: JSONP requires the options to contain the constants.OptionKeyClientCallback value.")
}
clientContextString, hasClientContext := options[constants.OptionKeyClientContext].(string)
if !hasClientContext {
callbackString = stewstrings.MergeStrings(callbackFunctionName, "(", string(json), ");")
} else {
callbackString = stewstrings.MergeStrings(options[constants.OptionKeyClientCallback].(string), "(", string(json), `,"`, clientContextString, `"`, ");")
}
return []byte(callbackString), nil
}
func (p *PathPattern) String() string {
return stewstrings.MergeStrings("{PathPattern:\"", p.RawPath, "\"}")
}
// MapController maps a controller to a specified path prefix.
//
// For more information, see goweb.MapController.
func (h *HttpHandler) MapController(options ...interface{}) error {
var matcherFuncStartPos int = -1
var path string
var controller interface{}
if len(options) == 0 {
// no arguments is an error
panic("goweb: Cannot call MapController with no arguments")
}
switch options[0].(type) {
case string: // (path, controller)
if len(options) == 1 {
// we need more than just a string
panic("goweb: Cannot call MapController without a Controller")
}
path = options[0].(string)
controller = options[1]
matcherFuncStartPos = 2
default: // (controller)
if restfulController, ok := options[0].(controllers.RestfulController); ok {
controller = restfulController
path = restfulController.Path()
} else {
// use the default path
controller = options[0]
path = paths.PathPrefixForClass(options[0])
}
matcherFuncStartPos = 1
}
// store the matcher function slice
var matcherFuncs []MatcherFunc = findMatcherFuncs(options[matcherFuncStartPos:]...)
// get the specialised paths that we might need
pathWithID := stewstrings.MergeStrings(path, "/{", RestfulIDParameterName, "}") // e.g. people/123
pathWithOptionalID := stewstrings.MergeStrings(path, "/[", RestfulIDParameterName, "]") // e.g. people/[123]
// get the HTTP methods that we will end up mapping
collectiveMethods := optionsListForResourceCollection(h, controller)
singularMethods := optionsListForSingleResource(h, controller)
// BeforeHandler
if beforeController, ok := controller.(controllers.BeforeHandler); ok {
// map the collective before handler
h.MapBefore(collectiveMethods, path, beforeController.Before, matcherFuncs)
// map the singular before handler
h.MapBefore(singularMethods, pathWithID, beforeController.Before, matcherFuncs)
}
// AfterHandler
if afterController, ok := controller.(controllers.AfterHandler); ok {
// map the collective after handler
h.MapAfter(collectiveMethods, path, afterController.After, matcherFuncs)
// map the singular after handler
h.MapAfter(singularMethods, pathWithID, afterController.After, matcherFuncs)
}
// POST /resource - Create
if restfulController, ok := controller.(controllers.RestfulCreator); ok {
h.Map(h.HttpMethodForCreate, path, restfulController.Create, matcherFuncs)
}
// GET /resource/{id} - Read
if restfulController, ok := controller.(controllers.RestfulReader); ok {
h.Map(h.HttpMethodForReadOne, pathWithID, func(ctx context.Context) error {
return restfulController.Read(ctx.PathParams().Get(RestfulIDParameterName).Str(), ctx)
}, matcherFuncs)
}
// GET /resource - ReadMany
if restfulController, ok := controller.(controllers.RestfulManyReader); ok {
h.Map(h.HttpMethodForReadMany, path, restfulController.ReadMany, matcherFuncs)
}
// DELETE /resource/{id} - Delete
if restfulController, ok := controller.(controllers.RestfulDeletor); ok {
h.Map(h.HttpMethodForDeleteOne, pathWithID, func(ctx context.Context) error {
return restfulController.Delete(ctx.PathParams().Get(RestfulIDParameterName).Str(), ctx)
}, matcherFuncs)
}
// DELETE /resource - DeleteMany
if restfulController, ok := controller.(controllers.RestfulManyDeleter); ok {
h.Map(h.HttpMethodForDeleteMany, path, restfulController.DeleteMany, matcherFuncs)
}
// PATCH /resource/{id} - Update
if restfulController, ok := controller.(controllers.RestfulUpdater); ok {
h.Map(h.HttpMethodForUpdateOne, pathWithID, func(ctx context.Context) error {
return restfulController.Update(ctx.PathParams().Get(RestfulIDParameterName).Str(), ctx)
}, matcherFuncs)
}
// PATCH /resource - UpdateMany
if restfulController, ok := controller.(controllers.RestfulManyUpdater); ok {
h.Map(h.HttpMethodForUpdateMany, path, restfulController.UpdateMany, matcherFuncs)
}
// PUT /resource/{id} - Replace
if restfulController, ok := controller.(controllers.RestfulReplacer); ok {
h.Map(h.HttpMethodForReplace, pathWithID, func(ctx context.Context) error {
return restfulController.Replace(ctx.PathParams().Get(RestfulIDParameterName).Str(), ctx)
}, matcherFuncs)
}
// HEAD /resource/[id] - Head
if restfulController, ok := controller.(controllers.RestfulHead); ok {
h.Map(h.HttpMethodForHead, pathWithOptionalID, restfulController.Head, matcherFuncs)
}
// OPTIONS /resource/[id] - Options
if restfulController, ok := controller.(controllers.RestfulOptions); ok {
h.Map(h.HttpMethodForOptions, pathWithOptionalID, restfulController.Options, matcherFuncs)
} else {
// use the default options implementation
h.Map(http.MethodOptions, path, func(ctx context.Context) error {
ctx.HttpResponseWriter().Header().Set("Allow", strings.Join(collectiveMethods, ","))
ctx.HttpResponseWriter().WriteHeader(200)
return nil
}, matcherFuncs)
h.Map(http.MethodOptions, pathWithID, func(ctx context.Context) error {
ctx.HttpResponseWriter().Header().Set("Allow", strings.Join(singularMethods, ","))
ctx.HttpResponseWriter().WriteHeader(200)
return nil
}, matcherFuncs)
}
// everything ok
return nil
}