96 lines
2.7 KiB
Go
96 lines
2.7 KiB
Go
package controllers
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import (
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"github.com/owncast/owncast/config"
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"github.com/owncast/owncast/core/data"
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"github.com/owncast/owncast/static"
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"github.com/owncast/owncast/utils"
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log "github.com/sirupsen/logrus"
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)
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var _hasWarnedSVGLogo = false
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// GetLogo will return the logo image as a response.
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func GetLogo(w http.ResponseWriter, r *http.Request) {
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imageFilename := data.GetLogoPath()
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if imageFilename == "" {
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returnDefault(w)
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return
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}
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imagePath := filepath.Join(config.DataDirectory, imageFilename)
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imageBytes, err := getImage(imagePath)
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if err != nil {
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returnDefault(w)
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return
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}
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contentType := "image/jpeg"
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if filepath.Ext(imageFilename) == ".svg" {
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contentType = "image/svg+xml"
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} else if filepath.Ext(imageFilename) == ".gif" {
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contentType = "image/gif"
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} else if filepath.Ext(imageFilename) == ".png" {
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contentType = "image/png"
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}
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cacheTime := utils.GetCacheDurationSecondsForPath(imagePath)
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writeBytesAsImage(imageBytes, contentType, w, cacheTime)
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}
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// GetCompatibleLogo will return the logo unless it's a SVG
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// and in that case will return a default placeholder.
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// Used for sharing to external social networks that generally
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// don't support SVG.
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func GetCompatibleLogo(w http.ResponseWriter, r *http.Request) {
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imageFilename := data.GetLogoPath()
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// If the logo image is not a SVG then we can return it
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// without any problems.
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if imageFilename != "" && filepath.Ext(imageFilename) != ".svg" {
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GetLogo(w, r)
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return
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}
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// Otherwise use a fallback logo.png.
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imagePath := filepath.Join(config.DataDirectory, "logo.png")
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contentType := "image/png"
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imageBytes, err := getImage(imagePath)
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if err != nil {
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returnDefault(w)
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return
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}
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cacheTime := utils.GetCacheDurationSecondsForPath(imagePath)
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writeBytesAsImage(imageBytes, contentType, w, cacheTime)
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if !_hasWarnedSVGLogo {
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log.Warnf("an external site requested your logo. because many social networks do not support SVGs we returned a placeholder instead. change your current logo to a png or jpeg to be most compatible with external social networking sites.")
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_hasWarnedSVGLogo = true
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}
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}
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func returnDefault(w http.ResponseWriter) {
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imageBytes := static.GetLogo()
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cacheTime := utils.GetCacheDurationSecondsForPath("logo.png")
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writeBytesAsImage(imageBytes, "image/png", w, cacheTime)
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}
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func writeBytesAsImage(data []byte, contentType string, w http.ResponseWriter, cacheSeconds int) {
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w.Header().Set("Content-Type", contentType)
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w.Header().Set("Content-Length", strconv.Itoa(len(data)))
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w.Header().Set("Cache-Control", "public, max-age="+strconv.Itoa(cacheSeconds))
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if _, err := w.Write(data); err != nil {
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log.Println("unable to write image.")
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}
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}
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func getImage(path string) ([]byte, error) {
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return os.ReadFile(path) // nolint
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}
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