checkDirAndCreate tests if the given directory exists and tries to create it.

Debugf is a helper function for Debug logging if global variable Debug is set to true.

DetectBrowserOrCLI checks for the existance of a User-Agent request header and primitivly tries to check if the request was made from a browser or from a CLI, like wget or curl and returns either "plain" if a CLI was detected or "html" if a browser was detected.

Fatalf is a helper function for fatal logging.

FileExists checks if the given file exists and returns a bool.

funcName return the function name as a string.

GetRequestClientIp extract the client IP address from the request with support for X-Forwarded-For header when the request is originating from proxied networks.

getSha256sumFile return the SHA256 hash sum of the given file.

Infof is a helper function for Info logging if global variable Info is set to true.

isDir checks if the given dir exists and returns a bool.

NormalizeDir removes from the given directory path multiple redundant slashes and adds a trailing slash.

randSeq returns a fixed length random string to identify each request in the log http://stackoverflow.com/a/22892986/682847.

Verbosef is a helper function for Verbose logging if global variable Verbose is set to true.

Warnf is a helper function for warning logging.

Debug variable to toggle debug output.

Verbose variable to toggle verbose output.

ExecResult contains the exit code and output of an external command (e.g.