F*EX Frequently Asked Questions: User

Sections: [Meta] User [Admin] [Misc] [All]


User Q1:What is the "auth-ID"?
User Q2:What is the difference between all these user types (full, sub, group, external, ...)?
User Q3:Does my recipient need a F*EX account too, to receive files?
User Q4:I have uploaded a HUGE file but misspelled my recipient's address. Now I have got an error bounce email. Must I re-upload the HUGE file?
User Q5:I have uploaded a HUGE file but forgot another recipient. Must I re-upload the HUGE file?
User Q6:Can I use an HTTP proxy?
User Q7:My recipient has lost the notification email with the download-URL. What can I do?
User Q8:Why should I use a special F*EX client?
User Q9:What are all those UNIX clients for?
User Q10:How do I install the UNIX clients?
User Q11:How can I use the UNIX clients with Windows?
User Q12:How can I upload several files at once?
User Q13:I cannot upload files > 2 GB with my web browser!?
User Q14:I need to send a file bigger than my quota allows. What can I do?
User Q15:Why is the upload status window empty and I cannot see the progress bar?
User Q16:My download was aborted before it was finished. Can I resume the download?
User Q17:My upload was aborted before it was finished. Can I resume the upload?
User Q18:Can I download a file while the upload is still in progress?
User Q19:How often can I download a file?
User Q20:Can I integrate F*EX in my mail program (thunderbird, outlook, etc)?
User Q21:Can I use a download manager/accelerator?
User Q22:Why is there an error "FILE has already been downloaded"?
User Q23:I have uploaded a file to a list of recipients. Will the file be deleted after the first recipient has dowloaded it?
User Q24:Can I fex to a mailing list?
User Q25:Sending as a F*EX user is easy, but how to receive files from others, external users?
User Q26:What is a F*EX group?
User Q27:What is a F*EX share?
User Q28:I am not a user of your site. How can I send a file to a registered user?
User Q29:Sometimes I can download a file more than once, especially when I repeat it quickly. Is the autodelete feature buggy?
User Q30:The default keep time is too short for me (sender), I need more. How can I set it?
User Q31:The default keep time is too short for me (recipient), I need more. How can I set it?
User Q32:I forgot to download a file. Now it is expired. How can I obtain it nevertheless?
User Q33:When I try to download a file again, I get the error message: "file has been autodeleted after download". Can you restore it?
User Q34:I have sent a second file with the same name, but the recipient has not received a second notification email. Why?
User Q35:How can I add a longer (multi-line) comment to the notification email?
User Q36:How can I sent a more compact notification email?
User Q37:How can I suppress the automatic notification email?
User Q38:Can I delete a file without downloading?
User Q39:Can I get a copy of the notification email?
User Q40:Can I get a notification email on download?
User Q41:Can I have encrypted emails?
User Q42:I need ACLs for group access, versioning, a file browser and integration in my local file system.
User Q43:I cannot download files with Internet Explorer, it tells me "Cannot open Internet site". What shall I do?
User Q44:I cannot login with Internet Explorer, it tells me "This page can't be displayed". What shall I do?
User Q45:I have recived a "file.7z". How can I extract it on my Mac?
User Q46:How can I prevent the fexsend error SSL3_GET_SERVER_CERTIFICATE:certificate verify failed?


User Q1:What is the "auth-ID"?
User A1: The auth-ID is an internal identification which authentificates the user.
It will be first generated by the admin or the automatic registration process and can later be modified by you, the user.
Think of some kind of a low security password.
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User Q2:What is the difference between all these user types (full, sub, group, external, ...)?
User A2: See [http://fex.rus.uni-stuttgart.de/users.html]
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User Q3:Does my recipient need a F*EX account too, to receive files?
User A3: No.
F*EX operates similar to email:
You, the sender, need an account on your server, the recipient not.
Receiving is "free".
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User Q4:I have uploaded a HUGE file but misspelled my recipient's address. Now I have got an error bounce email. Must I re-upload the HUGE file?
User A4: No, it is not necessary. You can redirect the file with "user config & operation control"
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User Q5:I have uploaded a HUGE file but forgot another recipient. Must I re-upload the HUGE file?
User A5: No, it is not necessary. You can forward-copy the file with "user config & operation control"
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User Q6:Can I use an HTTP proxy?
User A6: Yes, but pay attention:
Some HTTP proxies like privoxy delay the upload progress bar!
You may want to disable proxying fex.rus.uni-stuttgart.de if you run into this problem.
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User Q7:My recipient has lost the notification email with the download-URL. What can I do?
User A7: You can resend the notification email via "user config & operation control"
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User Q8:Why should I use a special F*EX client?
User A8: When you are using F*EX with your webbrowser, you are limited to its restrictions.
With a special F*EX client [http://fex.rus.uni-stuttgart.de/tools.html] you can

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User Q9:What are all those UNIX clients for?
User A9:
fexsend: send file(s) to others or yourself
fexget: download file(s)
fexpush: share archives with other users (upload)
fexpull: share archives with other users (download)
fexpack: upload file(s) into a fex package and retrieve download commands and URLs
fexsync: rsync-alike file synchronization via fexserver
fexdox: document exchange and file synchronization
autofex: fex all new files which will be created or modified
autodox: dox all new files which will be created or modified
xx: internet clipboard for files or STDIN/STDOUT
xxx: extended internet clipboard with versioning and export to foreign users (1 day expiration)
fexstore: fexpush based internet clipboard with versioning and export to foreign users (no expiration)
sexsend: send data stream
sexget: get data stream

(fexpush, fexpull and fexstore need server sharing support enabled by the fexmaster)

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User Q10:How do I install the UNIX clients?
User A10: wget fex.belwue.de/download/fex.pl && perl fex.pl
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User Q11:How can I use the UNIX clients with Windows?
User A11: See [http://fex.rus.uni-stuttgart.de/usecases/cygwin.html]
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User Q12:How can I upload several files at once?
User A12: Put your files in an archive file (TAR or ZIP). Your web browser cannot do that.
Or you can use a F*EX client, see [http://fex.rus.uni-stuttgart.de/tools.html]
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User Q13:I cannot upload files > 2 GB with my web browser!?
User A13: Many web browsers have bugs in their HTML-FORM implementation. The limit mostly is 2 GB, sometimes 4 GB.
Firefox and Google Chrome have no limitation.
But remember: No web browser is able to resume an interrupted upload.
You need a special F*EX client like fexsend or fexit for resuming, see [http://fex.rus.uni-stuttgart.de/tools.html]
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User Q14:I need to send a file bigger than my quota allows. What can I do?
User A14: Simply ask fexmaster@rus.uni-stuttgart.de to raise your quota.
If you want to send a REALLY big file, you also have to tell the recipient's address because his quota also has to be raised.
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User Q15:Why is the upload status window empty and I cannot see the progress bar?
User A15: Most probably you are using a (enforced) web proxy, which cannot handle dynamic HTML pages.
A workaround is using Google Chrome, which shows the upload status by itself.
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User Q16:My download was aborted before it was finished. Can I resume the download?
User A16: F*EX supports resuming at download, but your client also has to support this feature.
Firefox e.g. is missing this HTTP feature, you need an other client like opera, wget or fexget.
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User Q17:My upload was aborted before it was finished. Can I resume the upload?
User A17: F*EX supports resuming at upload, but your client also has to support it.
No web browser has this feature, you need a special F*EX client like fexsend or fexit,
see [http://fex.rus.uni-stuttgart.de/tools.html]
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User Q18:Can I download a file while the upload is still in progress?
User A18: Use the F*EX client fexsend with the pseudo-recipient "+"
You will see a download URL when the upload starts.
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User Q19:How often can I download a file?
User A19: This depends on the server settings (by the administrator) and the parameters the sender was using.
The possibilities are:

AUTODELETE=YES : the file will be deleted immediatelly after download
AUTODELETE=DELAY : the file will be still available the whole day after download
AUTODELETE=NO : the file will be available until expiration date
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User Q20:Can I integrate F*EX in my mail program (thunderbird, outlook, etc)?
User A20: Yes, if your mail admin has set up a "fexmail" smtp relay.
[http://fex.belwue.de/usecases/BIGMAIL.html]
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User Q21:Can I use a download manager/accelerator?
User A21: Generally, no, because they suck: they are not RFC compliant and produce a LOT of unnecessary server load.
But there is one exception: axel
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User Q22:Why is there an error "FILE has already been downloaded"?
User A22: Either you or someone else have already downloaded this file. Now it is gone.
Downloads are limited to a specific recipient. One cannot share it.
Perhaps the sender has fexed it to a mailing list (which is a bad idea!)?
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User Q23:I have uploaded a file to a list of recipients. Will the file be deleted after the first recipient has dowloaded it?
User A23: No. Every recipient gets his own copy of the file which is independant from the others.
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User Q24:Can I fex to a mailing list?
User A24: Generally: no, because the first download makes the file no more available for others.
Contact fexmaster@rus.uni-stuttgart.de, he can allow multiple downloads for specific addresses.
Or use "." as the recipents address: this means "fex yourself with multi-download".
The download-URL will be shown immediatelly.
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User Q25:Sending as a F*EX user is easy, but how to receive files from others, external users?
User A25: Register them as your subusers, create a F*EX group or a one-time upload key with "user config & operation control"
See also [http://fex.belwue.de/usecases/foreign.html]
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User Q26:What is a F*EX group?
User A26: F*EX group is similar to a mailing list, but for files:
When a member fexes a file to this list, then all other members will receive it.
Any full user can create a F*EX group and add or delete members.
See "user config & operation control" → "Manage your subusers and groups"
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User Q27:What is a F*EX share?
User A27: Archives and users are bundled in a so called share: a common storage place with specific access rights.
A share archive is a tar or zip container which contains files and has a date+time version string.
A F*EX share is created and controlled by his owner, who gives other users access rights.
Your fexmaster has to allow F*EX sharing, before you can use it.
See "user config & operation control" → "Manage your share archives and users"
See [http://fex.rus.uni-stuttgart.de/sharing/] for more information.
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User Q28:I am not a user of your site. How can I send a file to a registered user?
User A28: See question above: you must ask a regular user to register you as his subuser.
You will then get a specific upload URL from him.
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User Q29:Sometimes I can download a file more than once, especially when I repeat it quickly. Is the autodelete feature buggy?
User A29: The F*EX server has a grace time of 1 minute after first sucessfully download in which the file is still available. This is necessary because of some stupid "download managers" which request the file several times at once. Otherwise they would report an error to the user.

Your fexmaster has set AUTODELETE=DELAY as default, which means that the autodelete cleanup process is called once a day.

Power users (use the source, Luke!) can set a "do not delete after download" flag.

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User Q30:The default keep time is too short for me (sender), I need more. How can I set it?
User A30: Use fexsend, ask fexmaster@rus.uni-stuttgart.de or read the source code :-)
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User Q31:The default keep time is too short for me (recipient), I need more. How can I set it?
User A31: Ask fexmaster@rus.uni-stuttgart.de to raise your default KEEP value.
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User Q32:I forgot to download a file. Now it is expired. How can I obtain it nevertheless?
User A32: An expired file is definitively deleted. Even the admin cannot restore it.
You must re-request it from the sender.
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User Q33:When I try to download a file again, I get the error message: "file has been autodeleted after download". Can you restore it?
User A33: No. You must re-request it from the sender.
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User Q34:I have sent a second file with the same name, but the recipient has not received a second notification email. Why?
User A34: A file with the same name to the same recpient overwrites the first one if it is still there (no download so far).
A second notification email of the same file(name) is not suggestive.
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User Q35:How can I add a longer (multi-line) comment to the notification email?
User A35: Fex the file to yourself, take the shown download-URL and write an email to your recipient with your explanations using your regular email program.
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User Q36:How can I sent a more compact notification email?
User A36: Let your comment start with "!.!", then the notification email will contain only download-URL, size and comment.
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User Q37:How can I suppress the automatic notification email?
User A37: Use "!#!" as comment, then no notification email will be sent.
Of course you then have to inform the recipient manually.
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User Q38:Can I delete a file without downloading?
User A38: Add "?DELETE" to your download URL.
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User Q39:Can I get a copy of the notification email?
User A39: Add "!bcc!" to the comment field on upload.
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User Q40:Can I get a notification email on download?
User A40: No.
Such a feature is in conflict with German and European privacy laws and will not be implemented.
With email you also have no acknowledgement of receipt.
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User Q41:Can I have encrypted emails?
User A41: See [http://fex.belwue.de/gpg.html]
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User Q42:I need ACLs for group access, versioning, a file browser and integration in my local file system.
User A42: This is beyond the scope of F*EX, which is designed for efficient file transfer only.
But have a look at
[http://fex.rus.uni-stuttgart.de/sharing/]
[http://fex.rus.uni-stuttgart.de/DOX/]
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User Q43:I cannot download files with Internet Explorer, it tells me "Cannot open Internet site". What shall I do?
User A43: Use Firefox or any other Internet-compatible web browser, that Internet Explorer is not.
This is one of the many bugs of Internet Explorer.
See also [http://support.microsoft.com/kb/323308]
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User Q44:I cannot login with Internet Explorer, it tells me "This page can't be displayed". What shall I do?
User A44: Use Firefox or any other Internet-compatible web browser, that Internet Explorer is not.
This is one of the many bugs of Internet Explorer.
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User Q45:I have recived a "file.7z". How can I extract it on my Mac?
User A45: For example with "Stuffit Expander":
[https://itunes.apple.com/us/app/stuffit-expander/id405580712?mt=12]
[http://my.smithmicro.com/stuffit-expander-mac-download.html]
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User Q46:How can I prevent the fexsend error SSL3_GET_SERVER_CERTIFICATE:certificate verify failed?
User A46: Set the environment variable SSLVERIFY=0

Rationale:
Your openssl library cannot resolve the SSL certification path.
With SSLVERIFY=0 you tell openssl to ignore certification verification.
Yes, this is a crude workaround :-}

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