63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
|
// Copyright © 2016 Abcum Ltd
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package api
|
||
|
|
|
||
|
|
import (
|
||
|
|
"mime"
|
||
|
|
"sort"
|
||
|
|
|
||
|
|
"github.com/labstack/echo"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TypeOpts defines options for the Head middleward
|
||
|
|
type TypeOpts struct {
|
||
|
|
AllowedContent []string
|
||
|
|
}
|
||
|
|
|
||
|
|
// Type defines middleware for checking the request content-type
|
||
|
|
func Type(opts *TypeOpts) echo.MiddlewareFunc {
|
||
|
|
return func(h echo.HandlerFunc) echo.HandlerFunc {
|
||
|
|
return func(c *echo.Context) error {
|
||
|
|
|
||
|
|
// Set default values for opts.AllowedContent
|
||
|
|
allowedContent := opts.AllowedContent
|
||
|
|
if len(allowedContent) == 0 {
|
||
|
|
allowedContent = []string{echo.ApplicationJSON}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Extract the Content-Type header
|
||
|
|
header := c.Request().Header.Get(echo.ContentType)
|
||
|
|
cotype, _, _ := mime.ParseMediaType(header)
|
||
|
|
|
||
|
|
// Sort and search opts.AllowedContent types
|
||
|
|
sort.Strings(allowedContent)
|
||
|
|
i := sort.SearchStrings(allowedContent, cotype)
|
||
|
|
|
||
|
|
if c.Request().ContentLength == 0 {
|
||
|
|
return h(c)
|
||
|
|
}
|
||
|
|
|
||
|
|
if c.Request().ContentLength >= 1 {
|
||
|
|
if i < len(allowedContent) {
|
||
|
|
return h(c)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return code(415)
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|