fix: fallback to getting image file extension from url

src/MakeImagePersistencePlan.ts

@@ -8,44 +8,51 @@ export function makeImagePersistencePlan(
   imageOutputRootPath: string,
   imagePrefix: string
 ): void {
-  if (imageSet.fileType?.ext) {
-    // Since most images come from pasting screenshots, there isn't normally a filename. That's fine, we just make a hash of the url
-    // Images that are stored by notion come to us with a complex url that changes over time, so we pick out the UUID that doesn't change. Example:
-    //    https://s3.us-west-2.amazonaws.com/secure.notion-static.com/d1058f46-4d2f-4292-8388-4ad393383439/Untitled.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIAT73L2G45EIPT3X45%2F20220516%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20220516T233630Z&X-Amz-Expires=3600&X-Amz-Signature=f215704094fcc884d37073b0b108cf6d1c9da9b7d57a898da38bc30c30b4c4b5&X-Amz-SignedHeaders=host&x-id=GetObject
-    // But around Sept 2023, they changed the url to be something like:
-    //    https://prod-files-secure.s3.us-west-2.amazonaws.com/d9a2b712-cf69-4bd6-9d65-87a4ceeacca2/d1bcdc8c-b065-4e40-9a11-392aabeb220e/Untitled.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIAT73L2G45EIPT3X45%2F20230915%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20230915T161258Z&X-Amz-Expires=3600&X-Amz-Signature=28fca48e65fba86d539c3c4b7676fce1fa0857aa194f7b33dd4a468ecca6ab24&X-Amz-SignedHeaders=host&x-id=GetObject
-    // The thing we want is the last UUID before the ?
+  const urlBeforeQuery = imageSet.primaryUrl.split("?")[0];
 
-    const urlBeforeQuery = imageSet.primaryUrl.split("?")[0];
-    const thingToHash = findLastUuid(urlBeforeQuery) ?? urlBeforeQuery;
+  let imageFileExtension: string | undefined = imageSet.fileType?.ext;
+  if (!imageFileExtension) {
+    // Try to get the extension from the url
+    imageFileExtension = urlBeforeQuery.split(".").pop();
 
-    const hash = hashOfString(thingToHash);
-    imageSet.outputFileName = `${hash}.${imageSet.fileType.ext}`;
-
-    imageSet.primaryFileOutputPath = Path.posix.join(
-      imageOutputRootPath?.length > 0
-        ? imageOutputRootPath
-        : imageSet.pathToParentDocument!,
-      imageSet.outputFileName
-    );
-
-    if (imageOutputRootPath && imageSet.localizedUrls.length) {
+    if (!imageFileExtension) {
       error(
-        "imageOutputPath was declared, but one or more localizedUrls were found too. If you are going to localize screenshots, then you can't declare an imageOutputPath."
+        `Something wrong with the filetype extension on the blob we got from ${imageSet.primaryUrl}`
       );
       exit(1);
     }
+  }
+
+  // Since most images come from pasting screenshots, there isn't normally a filename. That's fine, we just make a hash of the url
+  // Images that are stored by notion come to us with a complex url that changes over time, so we pick out the UUID that doesn't change. Example:
+  //    https://s3.us-west-2.amazonaws.com/secure.notion-static.com/d1058f46-4d2f-4292-8388-4ad393383439/Untitled.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIAT73L2G45EIPT3X45%2F20220516%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20220516T233630Z&X-Amz-Expires=3600&X-Amz-Signature=f215704094fcc884d37073b0b108cf6d1c9da9b7d57a898da38bc30c30b4c4b5&X-Amz-SignedHeaders=host&x-id=GetObject
+  // But around Sept 2023, they changed the url to be something like:
+  //    https://prod-files-secure.s3.us-west-2.amazonaws.com/d9a2b712-cf69-4bd6-9d65-87a4ceeacca2/d1bcdc8c-b065-4e40-9a11-392aabeb220e/Untitled.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIAT73L2G45EIPT3X45%2F20230915%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20230915T161258Z&X-Amz-Expires=3600&X-Amz-Signature=28fca48e65fba86d539c3c4b7676fce1fa0857aa194f7b33dd4a468ecca6ab24&X-Amz-SignedHeaders=host&x-id=GetObject
+  // The thing we want is the last UUID before the ?
 
-    imageSet.filePathToUseInMarkdown =
-      (imagePrefix?.length > 0 ? imagePrefix : ".") +
-      "/" +
-      imageSet.outputFileName;
-  } else {
+  const thingToHash = findLastUuid(urlBeforeQuery) ?? urlBeforeQuery;
+
+  const hash = hashOfString(thingToHash);
+  imageSet.outputFileName = `${hash}.${imageFileExtension}`;
+
+  imageSet.primaryFileOutputPath = Path.posix.join(
+    imageOutputRootPath?.length > 0
+      ? imageOutputRootPath
+      : imageSet.pathToParentDocument!,
+    imageSet.outputFileName
+  );
+
+  if (imageOutputRootPath && imageSet.localizedUrls.length) {
     error(
-      `Something wrong with the filetype extension on the blob we got from ${imageSet.primaryUrl}`
+      "imageOutputPath was declared, but one or more localizedUrls were found too. If you are going to localize screenshots, then you can't declare an imageOutputPath."
     );
     exit(1);
   }
+
+  imageSet.filePathToUseInMarkdown =
+    (imagePrefix?.length > 0 ? imagePrefix : ".") +
+    "/" +
+    imageSet.outputFileName;
 }
 
 function findLastUuid(url: string): string | null {

src/makeImagePersistencePlan.spec.ts

@@ -42,6 +42,18 @@ test("primary file with defaults for image output path and prefix", () => {
   );
   expect(imageSet.filePathToUseInMarkdown).toBe(`./${expectedHash}.png`);
 });
+test("falls back to getting file extension from url if not in fileType", () => {
+  const imageSet: ImageSet = {
+    primaryUrl: "https://s3.us-west-2.amazonaws.com/primaryImage.png",
+    localizedUrls: [],
+    pathToParentDocument: "/pathToParentSomewhere/",
+  };
+  makeImagePersistencePlan(imageSet, "", "");
+  const expectedHash = hashOfString(
+    "https://s3.us-west-2.amazonaws.com/primaryImage.png"
+  );
+  expect(imageSet.outputFileName).toBe(`${expectedHash}.png`);
+});
 
 test("properly extract UUID from old-style notion image url", () => {
   const imageSet: ImageSet = {