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85 lines
2.4 KiB
85 lines
2.4 KiB
package binding
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import (
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"net/http"
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"strings"
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"gopkg.in/go-playground/validator.v9"
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)
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// MIME
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const (
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MIMEJSON = "application/json"
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MIMEHTML = "text/html"
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MIMEXML = "application/xml"
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MIMEXML2 = "text/xml"
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MIMEPlain = "text/plain"
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MIMEPOSTForm = "application/x-www-form-urlencoded"
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MIMEMultipartPOSTForm = "multipart/form-data"
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)
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// Binding http binding request interface.
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type Binding interface {
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Name() string
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Bind(*http.Request, interface{}) error
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}
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// StructValidator http validator interface.
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type StructValidator interface {
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// ValidateStruct can receive any kind of type and it should never panic, even if the configuration is not right.
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// If the received type is not a struct, any validation should be skipped and nil must be returned.
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// If the received type is a struct or pointer to a struct, the validation should be performed.
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// If the struct is not valid or the validation itself fails, a descriptive error should be returned.
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// Otherwise nil must be returned.
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ValidateStruct(interface{}) error
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// RegisterValidation adds a validation Func to a Validate's map of validators denoted by the key
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// NOTE: if the key already exists, the previous validation function will be replaced.
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// NOTE: this method is not thread-safe it is intended that these all be registered prior to any validation
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RegisterValidation(string, validator.Func) error
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}
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// Validator default validator.
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var Validator StructValidator = &defaultValidator{}
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// Binding
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var (
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JSON = jsonBinding{}
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XML = xmlBinding{}
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Form = formBinding{}
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Query = queryBinding{}
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FormPost = formPostBinding{}
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FormMultipart = formMultipartBinding{}
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)
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// Default get by binding type by method and contexttype.
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func Default(method, contentType string) Binding {
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if method == "GET" {
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return Form
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}
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contentType = stripContentTypeParam(contentType)
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switch contentType {
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case MIMEJSON:
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return JSON
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case MIMEXML, MIMEXML2:
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return XML
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default: //case MIMEPOSTForm, MIMEMultipartPOSTForm:
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return Form
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}
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}
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func validate(obj interface{}) error {
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if Validator == nil {
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return nil
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}
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return Validator.ValidateStruct(obj)
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}
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func stripContentTypeParam(contentType string) string {
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i := strings.Index(contentType, ";")
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if i != -1 {
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contentType = contentType[:i]
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}
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return contentType
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}
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