Simple image hosting script, written in Haskell.

Features:

• Can upload images either from files or from the clipboard.
• Uses a username/password system to avoid spammers and unauthorized uploads.
• Works as a CGI script in a single-file binary.

The default compilation mode is to produce a static binary. This requires a static version of libgmp to be installed (e.g. with libgmp-static on Arch).

If you cannot install a static version of libgmp system-wide, you can compile it yourself and add the following lines to package.yaml:

extra-lib-dirs:
- /path/to/gmp-6.2.0/.libs

So that libgmp.a can be found. You can also pass this as a command line flag to stack: stack build --extra-lib-dirs=/path/to/....

Afterwards, just run stack build to build the executable in .stack-work/install/....

If you do not want to use static compilation and would rather link the libraries dynamically, you can remove the -static from ghc-options, cc-options and ld-options in package.yaml:

--- a/package.yaml
+++ b/package.yaml
@@ -60,6 +60,5 @@ tests:
     dependencies:
     - simghost
 
-ghc-options: -Wall -O2 -static -threaded
-cc-options: -static
-ld-options: -static -pthread
+ghc-options: -Wall -O2 -threaded
+ld-options: -pthread

After that, just run stack build to build the executable.

• Copy the executable to the path where you want the script to be accessible.
• Make sure that your webserver executes the script as CGI.
• Set up the configuration in settings.json (same directory as the script):

{
    "outputDir": "images/",
    "users": {
        "foo": "$2y$12$XiBSIoGnHcfaztfxEXe/uuCwuC5PEPlEIhavL28t4Kph/LLJYskke"
    }
}

(The passwords are bcrypt hashed)

• Make sure that the output directory exists.
• Congratulations, it should work!

For extra security, you should configure your webserver to deny access to at least the settings.json document. Preferably, you should also disable the directory listing for your output directory and deny access to any *.meta files.

As an example for Apache2, the following .htaccess can be used:

AddHandler cgi-script .cgi
DirectoryIndex simghost.cgi
Options -Indexes

<Files settings.json>
Deny from all
</Files>

<FilesMatch "\.meta$">
Deny from all
</FilesMatch>