I`m facing an issue where after I create binaries from pdf files uploads and them save them on the a DocumentReference attachment I cannot load the pdfs previews on my custom app because it returns CORS error. Here follows the code snipet on how the pdfs binaries are being created and saved: ---- const binaries = await Promise.all(files.map(file => medplum.createBinary({ data: file, contentType: file.type }) )); const document: DocumentReference = { resourceType: 'DocumentReference', status: 'current', ... date: moment(formData.reportedDate).utc().format('YYYY-MM-DDTHH:mm:ss.SSSZ'), content: binaries.map(binary => ({ attachment: { contentType: binary.contentType, url: binary.url } })), .. }; ---- After this I`m loading the saved attachments blob with: await medplum.download(selectedDocument.content[selectedAttachmentIndex].attachment.url); And then I`m receiving this error: Access to fetch at 'https://storage.medplum.com/binary/..' from origin **'localhost or our custom production domain**' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled. Is there a way to workaround this considering that we have a custom web app running on top of Medplum Hosted client? Obs: For image files this is working fine.

Hi @henriquecgarcez , have you seen the documentation here regarding CORS and binaries? https://www.medplum.com/docs/fhir-datastore/binary-data#consuming-a-fhir-binary-in-an-application