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