src/main/kotlin/net/pterodactylus/sone/web/pages/UploadImagePage.kt

   1 package net.pterodactylus.sone.web.pages
   2
   3 import freenet.support.api.Bucket
   4 import net.pterodactylus.sone.data.Sone
   5 import net.pterodactylus.sone.text.TextFilter
   6 import net.pterodactylus.sone.utils.emptyToNull
   7 import net.pterodactylus.sone.utils.headers
   8 import net.pterodactylus.sone.utils.isPOST
   9 import net.pterodactylus.sone.utils.parameters
  10 import net.pterodactylus.sone.utils.use
  11 import net.pterodactylus.sone.web.WebInterface
  12 import net.pterodactylus.sone.web.page.FreenetRequest
  13 import net.pterodactylus.util.template.Template
  14 import net.pterodactylus.util.template.TemplateContext
  15 import java.awt.image.BufferedImage
  16 import java.io.ByteArrayInputStream
  17 import java.io.ByteArrayOutputStream
  18 import javax.imageio.ImageIO
  19
  20 /**
  21  * Page implementation that lets the user upload an image.
  22  */
  23 class UploadImagePage(template: Template, webInterface: WebInterface):
  24                 LoggedInPage("uploadImage.html", template, "Page.UploadImage.Title", webInterface) {
  25
  26         override fun handleRequest(freenetRequest: FreenetRequest, currentSone: Sone, templateContext: TemplateContext) {
  27                 if (freenetRequest.isPOST) {
  28                         val parentAlbum = freenetRequest.parameters["parent"]!!.let(webInterface.core::getAlbum) ?: throw RedirectException("noPermission.html")
  29                         if (parentAlbum.sone != currentSone) {
  30                                 throw RedirectException("noPermission.html")
  31                         }
  32                         val title = freenetRequest.parameters["title", 200].emptyToNull ?: throw RedirectException("emptyImageTitle.html")
  33
  34                         val uploadedFile = freenetRequest.httpRequest.getUploadedFile("image")
  35                         val bytes = uploadedFile.data.use { it.toByteArray() }
  36                         val bufferedImage = bytes.toImage()
  37                         if (bufferedImage == null) {
  38                                 templateContext["messages"] = webInterface.l10n.getString("Page.UploadImage.Error.InvalidImage")
  39                                 return
  40                         }
  41
  42                         val temporaryImage = webInterface.core.createTemporaryImage(bytes.mimeType, bytes)
  43                         webInterface.core.createImage(currentSone, parentAlbum, temporaryImage).modify().apply {
  44                                 setWidth(bufferedImage.width)
  45                                 setHeight(bufferedImage.height)
  46                                 setTitle(title)
  47                                 setDescription(TextFilter.filter(freenetRequest.headers["Host"], freenetRequest.parameters["description", 4000]))
  48                         }.update()
  49                         throw RedirectException("imageBrowser.html?album=${parentAlbum.id}")
  50                 }
  51         }
  52
  53         private fun Bucket.toByteArray(): ByteArray = ByteArrayOutputStream(size().toInt()).use { outputStream ->
  54                 inputStream.copyTo(outputStream)
  55                 outputStream.toByteArray()
  56         }
  57
  58         private fun ByteArray.toImage(): BufferedImage? = ByteArrayInputStream(this).use {
  59                 ImageIO.read(it)
  60         }
  61
  62         private val ByteArray.mimeType get() = ByteArrayInputStream(this).use {
  63                 ImageIO.createImageInputStream(it).use {
  64                         ImageIO.getImageReaders(it).asSequence()
  65                                         .firstOrNull()?.originatingProvider?.mimeTypes?.firstOrNull()
  66                                         ?: UNKNOWN_MIME_TYPE
  67                 }
  68         }
  69
  70 }
  71
  72 private const val UNKNOWN_MIME_TYPE = "application/octet-stream"