THE NULL POINTER
================
{% set fhost_url = url_for("fhost", _external=True).rstrip("/") %}
HTTP POST files here:
    curl -F'file=@yourfile.png' {{ fhost_url }}
You can also POST remote URLs:
    curl -F'url=http://example.com/image.jpg' {{ fhost_url }}
If you don't want the resulting URL to be easy to guess:
    curl -F'file=@yourfile.png' -Fsecret= {{ fhost_url }}
    curl -F'url=http://example.com/image.jpg' -Fsecret= {{ fhost_url }}
Or you can shorten URLs:
    curl -F'shorten=http://example.com/some/long/url' {{ fhost_url }}

It is possible to append your own file name to the URL:
    {{ fhost_url }}/aaa.jpg/image.jpeg

File URLs are valid for at least 30 days and up to a year (see below).
Shortened URLs do not expire.

Files can be set to expire sooner by adding an "expires" parameter (in hours)
    curl -F'file=@yourfile.png' -Fexpires=24 {{ fhost_url }}
OR by setting "expires" to a timestamp in epoch milliseconds
    curl -F'file=@yourfile.png' -Fexpires=1681996320000 {{ fhost_url }}

Expired files won't be removed immediately, but will be removed as part of
the next purge.

Whenever a file that does not already exist or has expired is uploaded,
the HTTP response header includes an X-Token field. You can use this
to perform management operations on the file.

To delete the file immediately:
    curl -Ftoken=token_here -Fdelete= {{ fhost_url }}/abc.txt
To change the expiration date (see above):
    curl -Ftoken=token_here -Fexpires=3 {{ fhost_url }}/abc.txt

{% set max_size = config["MAX_CONTENT_LENGTH"]|filesizeformat(True) %}
Maximum file size: {{ max_size }}


FILE RETENTION PERIOD
---------------------

retention = min_age + (-max_age + min_age) * pow((file_size / max_size - 1), 3)

   days
 {{'{: 6}'.format(config.get("FHOST_MAX_EXPIRATION", 31536000000)//86400000)}} |  \
        |   \
        |    \
        |     \
        |      \
        |       \
        |        ..
        |          \
 {{'{: 6.1f}'.format((config.get("FHOST_MIN_EXPIRATION", 2592000000)/2 + config.get("FHOST_MAX_EXPIRATION", 31536000000)/2)/86400000)}} | ----------..-------------------------------------------
        |             ..
        |               \
        |                ..
        |                  ...
        |                     ..
        |                       ...
        |                          ....
        |                              ......
 {{'{: 6}'.format(config.get("FHOST_MIN_EXPIRATION", 2592000000)//86400000)}} |                                    ....................
          0{{ ((config["MAX_CONTENT_LENGTH"]/2)|filesizeformat(True)).split(" ")[0].rjust(27) }}{{ max_size.split(" ")[0].rjust(27) }}
           {{ max_size.split(" ")[1].rjust(54) }}