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Fixing PDF Extensions When Uploading Invoices to S3

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Hey! Been trying to grab invoices from my emails and upload them to S3. However, whenever they get to S3, the PDFs have a “undefined” extension. More details in comments

Fixing PDF Extensions When Uploading Invoices to S3 | Lindy Community

7 comments

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Mael
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Sample task run: https://chat.lindy.ai/attachment-handler-67f65098bac0f550166b4468/tasks?testRunId=67f6608515e80f3dc48d44c8
Mael
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Typical output link: https://invoicesbiped.s3.eu-north-1.amazonaws.com/INV_2501039_NOA_RD_Q1-Q2_2025.pdf.undefined
Mael
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and current flow, is there anything wrong in my approach? thanks!
Marvin A.
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hey there! I just double-checked and it seems to work on my end. Can you try to set the type to application/pdf ? also, in my test the auto file name field added another .pdf extension so might be worth prompting the field to avoid .pdf.pdf 🙂
Mael
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Weird, this system still creates .undefined files when uploaded 😕 did you have a specific s3 setup ?
Marvin A.
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Hmm no. But I can see from the new task of yours today it seems to work?! → just the .pdf.pdf issue seems to remain
Mael
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yep, it seems to have added the correct value now (just double pdf extension), however the output file “Object URL” in S3 shows an XML error and it shows a 0 B total size
👀1