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* main.c: Ensure essential directories on startupXavier Del Campo Romero2023-03-161-0/+72
| | | | | | So far, slcl failed with poorly described error messages when any of the essential directories were missing. Now, these are created automatically so that the initial setup is easier.
* main.c: Call form_free instead of repeating codeXavier Del Campo Romero2023-03-091-4/+1
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* Implement public file sharingXavier Del Campo Romero2023-03-091-14/+182
| | | | | | | | | | | | | An HTML form is now added next to each regular file, that generates a POST request. Then, slcl replies with a HTML document with a link to the public resource (which are implemented as symlinks). Limitations: - For now, only regular files can be shared i.e., sharing directories is not possible. While feasible, it still requires a larger refactor to list_dir and resource_layout, so that read-only access to the directory is provided to anonymous users.
* Translate whitespace to '+' in append_formXavier Del Campo Romero2023-03-091-11/+8
| | | | Otherwise, every function calling get_forms must implement this.
* main.c: Always append trailing slash to directoriesXavier Del Campo Romero2023-03-081-38/+8
| | | | | | Otherwise, slcl would fail to generate the URLs for the elements inside a directory, because of how cust_dirname worked, which also turned out to be redundant.
* Call page_forbidden on invalid authXavier Del Campo Romero2023-03-081-18/+1
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* Remove(3) f->tmpname from ctx_freeXavier Del Campo Romero2023-03-081-5/+0
| | | | | | Until now, f->tmpname was removed by move_file when the move operation succeeded. However, since a HTTP operation can fail before move_file is called, the temporary file must also be removed.
* main.c: Avoid leaking formsXavier Del Campo Romero2023-03-081-27/+39
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* main.c: Print error message only on errno != EEXISTXavier Del Campo Romero2023-03-081-2/+3
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* main.c: Replace + with whitespace for directoriesXavier Del Campo Romero2023-03-071-3/+5
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* main.c: Fix memory leak if append_form failsXavier Del Campo Romero2023-03-071-1/+7
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* main.c: Simplify code a bitXavier Del Campo Romero2023-03-071-8/+3
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* Perform some minor optimizationsXavier Del Campo Romero2023-03-061-1/+1
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* Implement user quotaXavier Del Campo Romero2023-03-061-3/+111
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This feature allows admins to set a specific quota for each user, in MiB. This feature is particularly useful for shared instances, where unlimited user storage might be unfeasible or even dangerous for the server. Also, a nice HTML5 <progress> element has been added to the site that shows how much of the quota has been consumed. If no quota is set, slcl falls back to the default behaviour i.e., assume unlimited storage. Limitations: - While HTTP does specify a Content-Length, which determines the length of the whole request, it does not specify how many files are involved or their individual sizes. - Because of this, if multiple files are uploaded simultaneously, the whole request would be dropped if user quota is exceeded, even if not all files exceeded it. - Also, Content-Length adds the length of some HTTP boilerplate (e.g.: boundaries), but slcl must rely on this before accepting the whole request. In other words, this means some requests might be rejected by slcl because of the extra bytes caused by such boilerplate. - When the quota is exceeded, slcl must close the connection so that the rest of the transfer is cancelled. Unfortunately, this means no HTML can be sent back to the customer to inform about the situation.
* main.c: Simplify failed login responseXavier Del Campo Romero2023-03-061-16/+3
| | | | | - Location seems to have no effect on 401 HTTP responses. - Content-Type is already set by page_failed_login.
* Initial commitXavier Del Campo Romero2023-02-281-0/+935
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