404 on upload new file after successful preflight check
I’m calling the Box API directly from JavaScript to upload a new file. As the docs suggest, I run a preflight check first, and that check succeeds (200). The code for the preflight check looks like this:
const preflightResponse = await fetch(url, {
method: "OPTIONS",
headers: {
Authorization: `Bearer ${this.#token}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
name,
parent: {
id: parentId,
},
}),
});
After that step succeeds, I move on to the next step of uploading the actual file. For this text, I’m just sending the text “Hello, world!” to a file named hello.txt. The parentId is the folder to upload to, and it exists (otherwise the preflight check would fail). The code to upload the file looks like this:
const form = new FormData();
form.append("attributes", JSON.stringify({
name,
parent: {
id: parentId,
},
}));
form.append("file", new Blob(["Hello, world!"]));
const response = await fetch(url, {
method: "POST",
headers: {
Authorization:
