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curl/docs/cmdline-opts/max-filesize.d

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+Long: max-filesize
+Arg: <bytes>
+Help: Maximum file size to download
+See-also: limit-rate
+Category: connection
+---
+Specify the maximum size (in bytes) of a file to download. If the file
+requested is larger than this value, the transfer will not start and curl will
+return with exit code 63.
+
+A size modifier may be used. For example, Appending 'k' or 'K' will count the
+number as kilobytes, 'm' or 'M' makes it megabytes, while 'g' or 'G' makes it
+gigabytes. Examples: 200K, 3m and 1G. (Added in 7.58.0)
+
+\fBNOTE:\fP The file size is not always known prior to download, and for such
+files this option has no effect even if the file transfer ends up being larger
+than this given limit. This concerns both FTP and HTTP transfers.