@startuml !theme vibrant participant user as C C-->API ++: I want to upload a file in X chunks API-->AWS ++: create_multipart_upload(bucket, file) AWS-->API --: UploadId loop For i in 1..X+1 API-->AWS ++: generate_presigned_url(UploadId, i) AWS-->API --: presigned URL end API-->C --: [presigned_urls] ... loop For u in presigned_urls C-->AWS ++: HTTP POST u <part> AWS-->C --: PartId, ETag end ... C-->API ++: Finished! [(PartId, Etag)] API-->AWS ++: complete_multipart_upload(...) AWS-->API --: OK API-->C --: OK @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       Pure Javascript  PNG  SVG  ASCII Art