github.com/go-kivik/kivik/v4@v4.3.2/x/kivikd/couchserver/favicon.go (about)

     1  // Licensed under the Apache License, Version 2.0 (the "License"); you may not
     2  // use this file except in compliance with the License. You may obtain a copy of
     3  // the License at
     4  //
     5  //  http://www.apache.org/licenses/LICENSE-2.0
     6  //
     7  // Unless required by applicable law or agreed to in writing, software
     8  // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
     9  // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    10  // License for the specific language governing permissions and limitations under
    11  // the License.
    12  
    13  //go:build !js
    14  
    15  package couchserver
    16  
    17  import (
    18  	"embed"
    19  	"io"
    20  	"net/http"
    21  	"os"
    22  
    23  	internal "github.com/go-kivik/kivik/v4/int/errors"
    24  )
    25  
    26  //go:embed files
    27  var files embed.FS
    28  
    29  // GetFavicon serves GET /favicon.ico
    30  func (h *Handler) GetFavicon() http.HandlerFunc {
    31  	return func(w http.ResponseWriter, _ *http.Request) {
    32  		var ico io.Reader
    33  		if h.Favicon == "" {
    34  			asset, err := files.Open("files/favicon.ico")
    35  			if err != nil {
    36  				panic(err)
    37  			}
    38  			defer asset.Close()
    39  			ico = asset
    40  		} else {
    41  			file, err := os.Open(h.Favicon)
    42  			if err != nil {
    43  				if os.IsNotExist(err) {
    44  					err = &internal.Error{Status: http.StatusNotFound, Message: "not found"}
    45  				}
    46  				h.HandleError(w, err)
    47  				return
    48  			}
    49  			ico = file
    50  			defer file.Close()
    51  		}
    52  		w.Header().Set("Content-Type", "image/x-icon")
    53  		_, err := io.Copy(w, ico)
    54  		h.HandleError(w, err)
    55  	}
    56  }