// ContentType gets the parsed value of a content type func (c *Context) ContentType(request *http.Request) (string, string, *errors.ParseError) { if v, ok := context.GetOk(request, ctxContentType); ok { if val, ok := v.(*contentTypeValue); ok { return val.MediaType, val.Charset, nil } } mt, cs, err := httpkit.ContentType(request.Header, httpkit.IsDelete(request.Method)) if err != nil { return "", "", err } context.Set(request, ctxContentType, &contentTypeValue{mt, cs}) return mt, cs, nil }
// BindValidRequest binds a params object to a request but only when the request is valid // if the request is not valid an error will be returned func (c *Context) BindValidRequest(request *http.Request, route *MatchedRoute, binder RequestBinder) error { var res []error requestContentType := "*/*" // check and validate content type, select consumer if httpkit.CanHaveBody(request.Method) { ct, _, err := httpkit.ContentType(request.Header, httpkit.IsDelete(request.Method)) if err != nil { res = append(res, err) } else { if err := validateContentType(route.Consumes, ct); err != nil { res = append(res, err) } cons, ok := route.Consumers[ct] if !ok { res = append(res, err) } else { route.Consumer = cons requestContentType = ct } } } // check and validate the response format if len(res) == 0 && httpkit.NeedsContentType(request.Method) { if str := NegotiateContentType(request, route.Produces, requestContentType); str == "" { res = append(res, errors.InvalidResponseFormat(request.Header.Get(httpkit.HeaderAccept), route.Produces)) } } // now bind the request with the provided binder // it's assumed the binder will also validate the request and return an error if the // request is invalid if binder != nil && len(res) == 0 { if err := binder.BindRequest(request, route); err != nil { return err } } if len(res) > 0 { return errors.CompositeValidationError(res...) } return nil }
func (p *untypedParamBinder) Bind(request *http.Request, routeParams RouteParams, consumer httpkit.Consumer, target reflect.Value) error { // fmt.Println("binding", p.name, "as", p.Type()) switch p.parameter.In { case "query": data, custom, hasKey, err := p.readValue(httpkit.Values(request.URL.Query()), target) if err != nil { return err } if custom { return nil } return p.bindValue(data, hasKey, target) case "header": data, custom, hasKey, err := p.readValue(httpkit.Values(request.Header), target) if err != nil { return err } if custom { return nil } return p.bindValue(data, hasKey, target) case "path": data, custom, hasKey, err := p.readValue(routeParams, target) if err != nil { return err } if custom { return nil } return p.bindValue(data, hasKey, target) case "formData": var err error var mt string mt, _, e := httpkit.ContentType(request.Header, httpkit.IsDelete(request.Method)) if e != nil { // because of the interface conversion go thinks the error is not nil // so we first check for nil and then set the err var if it's not nil err = e } if err != nil { return errors.InvalidContentType("", []string{"multipart/form-data", "application/x-www-form-urlencoded"}) } if mt != "multipart/form-data" && mt != "application/x-www-form-urlencoded" { return errors.InvalidContentType(mt, []string{"multipart/form-data", "application/x-www-form-urlencoded"}) } if mt == "multipart/form-data" { if err := request.ParseMultipartForm(defaultMaxMemory); err != nil { return errors.NewParseError(p.Name, p.parameter.In, "", err) } } if err := request.ParseForm(); err != nil { return errors.NewParseError(p.Name, p.parameter.In, "", err) } if p.parameter.Type == "file" { file, header, err := request.FormFile(p.parameter.Name) if err != nil { return errors.NewParseError(p.Name, p.parameter.In, "", err) } target.Set(reflect.ValueOf(httpkit.File{Data: file, Header: header})) return nil } if request.MultipartForm != nil { data, custom, hasKey, err := p.readValue(httpkit.Values(request.MultipartForm.Value), target) if err != nil { return err } if custom { return nil } return p.bindValue(data, hasKey, target) } data, custom, hasKey, err := p.readValue(httpkit.Values(request.PostForm), target) if err != nil { return err } if custom { return nil } return p.bindValue(data, hasKey, target) case "body": newValue := reflect.New(target.Type()) if err := consumer.Consume(request.Body, newValue.Interface()); err != nil { if err == io.EOF && p.parameter.Default != nil { target.Set(reflect.ValueOf(p.parameter.Default)) return nil } tpe := p.parameter.Type if p.parameter.Format != "" { tpe = p.parameter.Format } return errors.InvalidType(p.Name, p.parameter.In, tpe, nil) } target.Set(reflect.Indirect(newValue)) return nil default: return errors.New(500, fmt.Sprintf("invalid parameter location %q", p.parameter.In)) } }