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64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package blob
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//go:generate go-bindata -pkg blob -o files.go -ignore '(.*\.map|bootstrap\.js|bootstrap-theme\.css|bootstrap\.css)' templates/... static/...
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import (
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"fmt"
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"io"
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"net/http"
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"strings"
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"github.com/prometheus/common/log"
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"github.com/prometheus/common/route"
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)
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// Sub-directories for templates and static content.
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const (
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TemplateFiles = "templates"
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StaticFiles = "static"
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)
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var mimeMap = map[string]string{
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"css": "text/css",
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"js": "text/javascript",
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"descriptor": "application/vnd.google.protobuf;proto=google.protobuf.FileDescriptorSet",
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}
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// GetFile retrieves the content of an embedded file.
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func GetFile(bucket string, name string) ([]byte, error) {
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data, err := Asset(fmt.Sprintf("%s/%s", bucket, name))
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if err != nil {
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return nil, err
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}
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return data, nil
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}
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// Handler implements http.Handler.
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type Handler struct{}
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func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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ctx := route.Context(r)
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name := strings.Trim(route.Param(ctx, "filepath"), "/")
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if name == "" {
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name = "index.html"
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}
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file, err := GetFile(StaticFiles, name)
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if err != nil {
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if err != io.EOF {
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log.Warn("Could not get file: ", err)
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}
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w.WriteHeader(http.StatusNotFound)
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return
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}
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contentType := http.DetectContentType(file)
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if strings.Contains(contentType, "text/plain") || strings.Contains(contentType, "application/octet-stream") {
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parts := strings.Split(name, ".")
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contentType = mimeMap[parts[len(parts)-1]]
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}
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w.Header().Set("Content-Type", contentType)
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w.Header().Set("Cache-Control", "public, max-age=259200")
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w.Write(file)
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}
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