74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
package api
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import (
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"net/http"
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"strconv"
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"strings"
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"time"
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"git.velvettear.de/velvettear/loggo"
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"git.velvettear.de/velvettear/slideshow-api/internal"
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"git.velvettear.de/velvettear/slideshow-api/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("/", serveRandomImageName)
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http.HandleFunc("/image/", serveImage)
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http.HandleFunc("/palette/", servePalette)
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}
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// request url: '/' - serve the name of a random image
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func serveRandomImageName(writer http.ResponseWriter, request *http.Request) {
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timestamp := time.Now().UnixMilli()
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var response response
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response.Content, response.error = internal.GetRandomImage()
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if response.error != nil {
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response.StatusCode = 404
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}
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response.send(writer)
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loggo.DebugTimed("served random image '"+response.Content.(string)+"'", timestamp)
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}
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// request url: '/image' - serve an image
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func serveImage(writer http.ResponseWriter, request *http.Request) {
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var response response
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image, _ := strings.CutPrefix(request.URL.Path, "/image/")
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image, error := internal.GetImagePath(image)
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if error != nil {
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response.error = error
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response.StatusCode = 404
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response.send(writer)
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return
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}
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streamImage(writer, image, request.URL.Query().Get("resolution"))
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}
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// request url: '/palette' - serve the color palette of an image
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func servePalette(writer http.ResponseWriter, request *http.Request) {
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var response response
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image, _ := strings.CutPrefix(request.URL.Path, "/palette/")
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image, error := internal.GetImagePath(image)
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if error != nil {
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response.error = error
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response.StatusCode = 404
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response.send(writer)
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return
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}
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amount, _ := strconv.Atoi(request.URL.Query().Get("colors"))
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if amount <= 0 {
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amount = 16
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}
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streamColorPalette(writer, image, amount, request.URL.Query().Get("algorithm"))
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}
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