feat: rejection events

lib/generic-handlers.js

@@ -151,6 +151,18 @@ async function validateAttachment(req) {
 
     if (scanEnabled) {
       if (status !== "Clean") {
+        cds.spawn(async () => {
+          try {
+            const srv = await cds.connect.to("attachments")
+            await srv.emit("AttachmentDownloadRejected", {
+              target: req.target.name,
+              keys: { ID: attachmentId },
+              status,
+            })
+          } catch (err) {
+            LOG.error("Failed to emit AttachmentDownloadRejected", err)
+          }
+        })
         req.reject(403, "UnableToDownloadAttachmentScanStatusNotClean")
       }
 
@@ -263,6 +275,21 @@ async function validateAttachmentSize(req, validateContentLength = false) {
       .from(req.target)
       .where({ up__ID: req.data.up__ID })
 
+    cds.spawn(async () => {
+      try {
+        const AttachmentsSrv = await cds.connect.to("attachments")
+        await AttachmentsSrv.emit("AttachmentSizeExceeded", {
+          target: req.target.name,
+          keys: req.data.ID ? { ID: req.data.ID } : {},
+          filename: attachmentRef?.filename ?? "n/a",
+          fileSize: length,
+          maxFileSize,
+        })
+      } catch (err) {
+        LOG.error("Failed to emit AttachmentSizeExceeded", err)
+      }
+    })
+
     req.reject({
       status: 413,
       message: "AttachmentSizeExceeded",
@@ -289,6 +316,21 @@ function validateAttachmentMimeType(req) {
   const acceptableMediaTypes =
     req.target.elements.content["@Core.AcceptableMediaTypes"] || "*/*"
   if (!checkMimeTypeMatch(acceptableMediaTypes, mimeType)) {
+    cds.spawn(async () => {
+      try {
+        const AttachmentsSrv = await cds.connect.to("attachments")
+        await AttachmentsSrv.emit("AttachmentUploadRejected", {
+          target: req.target.name,
+          keys: req.data.ID ? { ID: req.data.ID } : {},
+          filename: req.data.filename,
+          mimeType,
+          acceptableMediaTypes,
+          reason: `MIME type '${mimeType}' is not in @Core.AcceptableMediaTypes`,
+        })
+      } catch (err) {
+        LOG.error("Failed to emit AttachmentUploadRejected", err)
+      }
+    })
     req.reject(400, "AttachmentMimeTypeDisallowed", {
       mimeType: mimeType,
     })