update: rename 'Server' into 'Handler'
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10e59acdae
commit
468a09be8d
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@ -115,5 +115,5 @@ func (b Builder) Build() (http.Handler, error) {
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}
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}
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}
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}
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return Server(b), nil
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return Handler(b), nil
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}
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}
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@ -8,22 +8,22 @@ import (
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"git.xdrm.io/go/aicra/internal/reqdata"
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"git.xdrm.io/go/aicra/internal/reqdata"
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)
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)
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// Server hides the builder and allows handling http requests
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// Handler wraps the builder to handle requests
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type Server Builder
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type Handler Builder
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// ServeHTTP implements http.Handler and is called on each request
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// ServeHTTP implements http.Handler
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func (server Server) ServeHTTP(res http.ResponseWriter, req *http.Request) {
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func (s Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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defer req.Body.Close()
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defer r.Body.Close()
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// 1. find a matching service in the config
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// 1. find a matching service from config
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service := server.conf.Find(req)
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var service = s.conf.Find(r)
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if service == nil {
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if service == nil {
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handleError(api.ErrUnknownService, w, r)
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handleError(api.ErrUnknownService, w, r)
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return
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return
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}
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}
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// 2. extract request data
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// 2. extract request data
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dataset, err := extractRequestData(service, *req)
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var input, err = extractInput(service, *r)
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if err != nil {
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if err != nil {
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handleError(api.ErrMissingParam, w, r)
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handleError(api.ErrMissingParam, w, r)
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return
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return
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@ -31,42 +31,42 @@ func (server Server) ServeHTTP(res http.ResponseWriter, req *http.Request) {
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// 3. find a matching handler
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// 3. find a matching handler
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var handler *apiHandler
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var handler *apiHandler
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for _, h := range server.handlers {
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for _, h := range s.handlers {
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if h.Method == service.Method && h.Path == service.Pattern {
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if h.Method == service.Method && h.Path == service.Pattern {
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handler = h
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handler = h
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}
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}
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}
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}
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// 4. fail if found no handler
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// 4. fail on no matching handler
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if handler == nil {
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if handler == nil {
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handleError(api.ErrUncallableService, w, r)
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handleError(api.ErrUncallableService, w, r)
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return
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return
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}
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}
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// 5. execute
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// 5. pass execution to the handler
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returned, apiErr := handler.dyn.Handle(dataset.Data)
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var outData, outErr = handler.dyn.Handle(input.Data)
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// 6. build response from returned data
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// 6. build res from returned data
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response := api.EmptyResponse().WithError(apiErr)
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var res = api.EmptyResponse().WithError(outErr)
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for key, value := range returned {
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for key, value := range outData {
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// find original name from rename
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// find original name from 'rename' field
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for name, param := range service.Output {
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for name, param := range service.Output {
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if param.Rename == key {
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if param.Rename == key {
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response.SetData(name, value)
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res.SetData(name, value)
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}
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}
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}
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}
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}
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}
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// 7. apply headers
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// 7. apply headers
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res.Header().Set("Content-Type", "application/json; charset=utf-8")
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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for key, values := range response.Headers {
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for key, values := range res.Headers {
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for _, value := range values {
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for _, value := range values {
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res.Header().Add(key, value)
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w.Header().Add(key, value)
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}
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}
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}
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}
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response.ServeHTTP(res, req)
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res.ServeHTTP(w, r)
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}
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}
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func handleError(err api.Err, w http.ResponseWriter, r *http.Request) {
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func handleError(err api.Err, w http.ResponseWriter, r *http.Request) {
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@ -74,7 +74,7 @@ func handleError(err api.Err, w http.ResponseWriter, r *http.Request) {
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response.ServeHTTP(w, r)
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response.ServeHTTP(w, r)
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}
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}
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func extractRequestData(service *config.Service, req http.Request) (*reqdata.T, error) {
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func extractInput(service *config.Service, req http.Request) (*reqdata.T, error) {
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var dataset = reqdata.New(service)
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var dataset = reqdata.New(service)
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// URI data
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// URI data
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