v2.0.0.0000

src/images.go

@@ -0,0 +1,153 @@
+package src
+
+import (
+  b64 "encoding/base64"
+  "fmt"
+  "io"
+  "io/ioutil"
+  "net/http"
+  "os"
+  "path/filepath"
+  "strings"
+)
+
+func getCacheImageURL(url string) (cacheImageURL string) {
+
+  url = strings.Trim(url, "\r\n")
+
+  var urlMD5 = getMD5(url)
+  var fileExtension = filepath.Ext(url)
+
+  if indexOfString(urlMD5+fileExtension, Data.Cache.ImagesFiles) == -1 {
+    Data.Cache.ImagesFiles = append(Data.Cache.ImagesFiles, urlMD5+fileExtension)
+  }
+
+  if Settings.CacheImages == false || System.ImageCachingInProgress == 1 {
+    return url
+  }
+
+  if indexOfString(urlMD5+fileExtension, Data.Cache.ImagesCache) != -1 {
+
+    cacheImageURL = fmt.Sprintf("%s://%s/images/%s%s", System.ServerProtocol.WEB, System.Domain, urlMD5, fileExtension)
+
+  } else {
+
+    if strings.Contains(url, System.Domain+"/images/") == false {
+
+      if indexOfString(url, Data.Cache.ImagesURLS) == -1 {
+        Data.Cache.ImagesURLS = append(Data.Cache.ImagesURLS, url)
+      }
+
+    }
+
+    cacheImageURL = url
+
+  }
+
+  return
+}
+
+func cachingImages() {
+
+  if Settings.CacheImages == false || System.ImageCachingInProgress == 1 {
+    return
+  }
+
+  System.ImageCachingInProgress = 1
+
+  showInfo("Image Caching:Images are cached")
+
+  for _, url := range Data.Cache.ImagesURLS {
+
+    if len(url) > 0 {
+      cacheImage(url)
+    }
+
+  }
+
+  showInfo("Image Caching:Done")
+
+  // Bilder die nicht mehr verwendet werden, werden gelöscht
+  files, err := ioutil.ReadDir(System.Folder.ImagesCache)
+  if err != nil {
+    ShowError(err, 0)
+    return
+  }
+
+  for _, file := range files {
+
+    if indexOfString(file.Name(), Data.Cache.ImagesFiles) == -1 {
+
+      var debug = fmt.Sprintf("Image Caching:Remove file: %s %s %d", System.Folder.ImagesCache+file.Name(), file.Name(), len(file.Name()))
+      showDebug(debug, 1)
+      err := os.RemoveAll(System.Folder.ImagesCache + file.Name())
+      if err != nil {
+        ShowError(err, 0)
+      }
+
+    }
+
+  }
+
+  System.ImageCachingInProgress = 0
+
+  return
+}
+
+func cacheImage(url string) {
+
+  var debug string
+  var urlMD5 = getMD5(url)
+  var fileExtension = filepath.Ext(url)
+
+  debug = fmt.Sprintf("Image Caching:File: %s Download: %s", urlMD5+fileExtension, url)
+  showDebug(debug, 1)
+
+  resp, err := http.Get(url)
+  if err != nil {
+    return
+  }
+  defer resp.Body.Close()
+
+  if resp.StatusCode != http.StatusOK {
+    return
+  }
+
+  var filePath = System.Folder.ImagesCache + urlMD5 + fileExtension
+
+  // Datei speichern
+  file, err := os.Create(filePath)
+  if err != nil {
+    return
+  }
+
+  defer file.Close()
+
+  _, err = io.Copy(file, resp.Body)
+
+  return
+}
+
+func uploadLogo(input, filename string) (logoURL string, err error) {
+
+  b64data := input[strings.IndexByte(input, ',')+1:]
+
+  // BAse64 in bytes umwandeln un speichern
+  sDec, err := b64.StdEncoding.DecodeString(b64data)
+
+  if err != nil {
+    return
+  }
+
+  var file = fmt.Sprintf("%s%s", System.Folder.ImagesUpload, filename)
+
+  err = writeByteToFile(file, sDec)
+  if err != nil {
+    return
+  }
+
+  logoURL = fmt.Sprintf("%s://%s/data_images/%s", System.ServerProtocol.WEB, System.Domain, filename)
+
+  return
+
+}