65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
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package api
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import (
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"encoding/json"
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"net/http"
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"strconv"
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"git.velvettear.de/velvettear/loggo"
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"git.velvettear.de/velvettear/slideshow/internal"
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"git.velvettear.de/velvettear/slideshow/internal/config"
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)
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// start the web server
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func Run() {
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address := config.ServerAddress + ":" + strconv.Itoa(config.ServerPort)
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loggo.Info("starting web server...", "address: "+address)
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registerHandlers()
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error := http.ListenAndServe(address, nil)
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if error != nil {
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loggo.Fatal("encountered an error starting the web server", "address: "+address, error.Error())
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}
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}
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// register the handlers
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func registerHandlers() {
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http.HandleFunc("/", handleImageRequest)
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}
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// handle the request to '/image'
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func handleImageRequest(writer http.ResponseWriter, request *http.Request) {
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if !internal.HasFoundImages() {
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writer.WriteHeader(404)
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return
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}
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name, data, error := internal.GetRandomImage()
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if error != nil {
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loggo.Error("encountered an error getting a random image", error.Error())
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writer.WriteHeader(501)
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writer.Write([]byte("encountered an internal server error (" + error.Error() + ")\n"))
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return
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}
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palette, error := internal.GetColorPalette(data)
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if error != nil {
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writer.WriteHeader(501)
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writer.Write([]byte("encountered an internal server error (" + error.Error() + ")\n"))
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return
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}
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bytes, error := json.Marshal(struct {
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Name string
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Palette string
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Data []byte
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}{
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name,
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palette,
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data,
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})
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if error != nil {
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loggo.Error("encountered an error marshalling the json response", error.Error())
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writer.WriteHeader(501)
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writer.Write([]byte("encountered an internal server error (" + error.Error() + ")\n"))
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return
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}
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writer.Write(bytes)
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}
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