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: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 Q4:I have uploaded a HUGE file but forgot another recipient. Must I re-upload the HUGE file?
User Q5:Can I use an HTTP proxy?
User Q6:My recipient has lost the notification email with the download-URL. What can I do?
User Q7:Why should I use a special F*EX client?
User Q8:What are all those UNIX clients for?
User Q9:How do I install the UNIX clients?
User Q10:How can I use the UNIX clients with Windows?
User Q11:How can I upload several files at once?
User Q12:I cannot upload files > 2 GB with my web browser!?
User Q13:I need to send a file bigger than my quota allows. What can I do?
User Q14:Why is the upload status window empty and I cannot see the progress bar?
User Q15:My download was aborted before it was finished. Can I resume the download?
User Q16:My upload was aborted before it was finished. Can I resume the upload?
User Q17:Can I download a file while the upload is still in progress?
User Q18:Can I integrate F*EX in my mail program (thunderbird, outlook, etc)?
User Q19:Can I use a download manager/accelerator?
User Q20:Why is there an error "FILE has already been downloaded"?
User Q21:Can I fex to a mailing list?
User Q22:Sending as a F*EX user is easy, but how to receive files from others, external users?
User Q23:What is a F*EX group?
User Q24:What is a F*EX share?
User Q25:I am not a user of your site. How can I send a file to a registered user?
User Q26:Sometimes I can download a file more than once, especially when I repeat it quickly. Is the autodelete feature buggy?
User Q27:I have uploaded a file to a list of recipients. Will the file be deleted after the first recipient has dowloaded it?
User Q28:The default keep time is too short for me (sender), I need more. How can I set it?
User Q29:The default keep time is too short for me (recipient), I need more. How can I set it?
User Q30:I forgot to download a file. Now it is expired. How can I obtain it nevertheless?
User Q31:When I try to download a file again, I get the error message: "file has been autodeleted after download". Can you restore it?
User Q32:I have sent a second file with the same name, but the recipient has not received a second notification email. Why?
User Q33:How can I sent a more compact notification email?
User Q34:How can I suppress the automatic notification email?
User Q35:Can I delete a file without downloading?
User Q36:Can I get a copy of the notification email?
User Q37:Can I get a notification email on download?
User Q38:Can I have encrypted emails?
User Q39:I need ACLs for group access, versioning, a file browser and integration in my local file system.
User Q40:I cannot download files with Internet Explorer, it tells me "Cannot open Internet site". What shall I do?
User Q41:I cannot login with Internet Explorer, it tells me "This page can't be displayed". What shall I do?
User Q42:I have recived a "file.7z". How can I extract it on my Mac?
User Q43: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: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 A3: No, it is not necessary. You can redirect the file with "user config & operation control"
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User Q4:I have uploaded a HUGE file but forgot another recipient. Must I re-upload the HUGE file?
User A4: No, it is not necessary. You can forward-copy the file with "user config & operation control"
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User Q5:Can I use an HTTP proxy?
User A5: 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 Q6:My recipient has lost the notification email with the download-URL. What can I do?
User A6: You can resend the notification email via "user config & operation control"
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User Q7:Why should I use a special F*EX client?
User A7: 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 Q8:What are all those UNIX clients for?
User A8:
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
autofex: fex all new files which will be created or modified (Linux only)
xx: internet clipboard for files or STDIN/STDOUT
xxx: 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 Q9:How do I install the UNIX clients?
User A9: wget fex.belwue.de/download/fex.pl && perl fex.pl
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User Q10:How can I use the UNIX clients with Windows?
User A10: See [http://fex.rus.uni-stuttgart.de/usecases/cygwin.html]
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User Q11:How can I upload several files at once?
User A11: 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 Q12:I cannot upload files > 2 GB with my web browser!?
User A12: 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 Q13:I need to send a file bigger than my quota allows. What can I do?
User A13: 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 Q14:Why is the upload status window empty and I cannot see the progress bar?
User A14: 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 Q15:My download was aborted before it was finished. Can I resume the download?
User A15: 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 Q16:My upload was aborted before it was finished. Can I resume the upload?
User A16: 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 Q17:Can I download a file while the upload is still in progress?
User A17: 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 Q18:Can I integrate F*EX in my mail program (thunderbird, outlook, etc)?
User A18: Yes, if your mail admin has set up a "fexmail" smtp relay.
[http://fex.belwue.de/usecases/BIGMAIL.html]
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User Q19:Can I use a download manager/accelerator?
User A19: 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 Q20:Why is there an error "FILE has already been downloaded"?
User A20: 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 Q21:Can I fex to a mailing list?
User A21: 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 fex the file to yourself and then put this download-URL manually in your mail.
These files can be multi-downloaded.
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User Q22:Sending as a F*EX user is easy, but how to receive files from others, external users?
User A22: 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 Q23:What is a F*EX group?
User A23: 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 Q24:What is a F*EX share?
User A24: 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 Q25:I am not a user of your site. How can I send a file to a registered user?
User A25: 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 Q26:Sometimes I can download a file more than once, especially when I repeat it quickly. Is the autodelete feature buggy?
User A26: 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 Q27:I have uploaded a file to a list of recipients. Will the file be deleted after the first recipient has dowloaded it?
User A27: No. Every recipient gets his own copy of the file which is independant from the others.
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User Q28:The default keep time is too short for me (sender), I need more. How can I set it?
User A28: Use fexsend, ask fexmaster@rus.uni-stuttgart.de or read the source code :-)
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User Q29:The default keep time is too short for me (recipient), I need more. How can I set it?
User A29: Ask fexmaster@rus.uni-stuttgart.de to raise your default KEEP value.
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User Q30:I forgot to download a file. Now it is expired. How can I obtain it nevertheless?
User A30: 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 Q31:When I try to download a file again, I get the error message: "file has been autodeleted after download". Can you restore it?
User A31: No. You must re-request it from the sender.
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User Q32:I have sent a second file with the same name, but the recipient has not received a second notification email. Why?
User A32: 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 Q33:How can I sent a more compact notification email?
User A33: Let your comment start with "!.!", then the notification email will contain only download-URL, size and comment.
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User Q34:How can I suppress the automatic notification email?
User A34: 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 Q35:Can I delete a file without downloading?
User A35: Add "?DELETE" to your download URL.
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User Q36:Can I get a copy of the notification email?
User A36: Add "!bcc!" to the comment field on upload.
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User Q37:Can I get a notification email on download?
User A37: 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 Q38:Can I have encrypted emails?
User A38: See [http://fex.belwue.de/gpg.html]
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User Q39:I need ACLs for group access, versioning, a file browser and integration in my local file system.
User A39: This is beyond the scope of F*EX, which is designed for efficient file transfer only.
But have a look at [http://fex.belwue.de/usecases/fexpush.html]
and [http://fex.rus.uni-stuttgart.de/sharing/]
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User Q40:I cannot download files with Internet Explorer, it tells me "Cannot open Internet site". What shall I do?
User A40: 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 Q41:I cannot login with Internet Explorer, it tells me "This page can't be displayed". What shall I do?
User A41: 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 Q42:I have recived a "file.7z". How can I extract it on my Mac?
User A42: 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 Q43:How can I prevent the fexsend error SSL3_GET_SERVER_CERTIFICATE:certificate verify failed?
User A43: 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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