Improve this question. In the example above weve chosen to set a CN (test.telegram.org), but also a SAN (sanexample.telegram.org) The CN given has to match the CN used for generating the CSR. sha1_checksum__v: The SHA-1 checksum value generated for the file. Screenshot At the top you can select a local image or data file, and the file signature and/or MIME type will be displayed. Complete List of MIME Types ## * table_car.csv ## uploaded into Drive file: ## * table_car: 1hwb57eT-9qSgDHt9CrVt5Ht7RHogQaMk ## with MIME type: ## * text/csv. Line 7 specifies the image format is pdf.Of course, you can also use other formats like jpg, but here we want a single file even if there are multiple images.. Line 6 specifies the output setting type is upload.For this type, you must specify upload_target.The upload target should contains information like url, additional post fields, cookies and headers if any (Lines 8-18). StringBody lets you pass a text payload defined in your code. Using "accept" help you filter input files based on their "suffix" or their "MIME type" 1.Filter based on suffix: Here "accept" attribute just allow to select files with .jpeg extension. Render an HTML template with a