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.text.TextFilter
   5 import net.pterodactylus.sone.utils.emptyToNull
   6 import net.pterodactylus.sone.utils.headers
   7 import net.pterodactylus.sone.utils.isPOST
   8 import net.pterodactylus.sone.utils.parameters
   9 import net.pterodactylus.sone.utils.use
  10 import net.pterodactylus.sone.web.WebInterface
  11 import net.pterodactylus.sone.web.page.FreenetRequest
  12 import net.pterodactylus.util.template.Template
  13 import net.pterodactylus.util.template.TemplateContext
  14 import org.bouncycastle.asn1.x500.style.RFC4519Style.title
  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                 SoneTemplatePage("uploadImage.html", template, "Page.UploadImage.Title", webInterface, true) {
  25
  26         override fun handleRequest(freenetRequest: FreenetRequest, templateContext: TemplateContext) {
  27                 if (freenetRequest.isPOST) {
  28                         val parentAlbum = freenetRequest.parameters["parent"]!!.let(webInterface.core::getAlbum) ?: throw RedirectException("noPermission.html")
  29                         if (parentAlbum.sone != getCurrentSone(freenetRequest.toadletContext)) {
  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(getCurrentSone(freenetRequest.toadletContext), 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"