zotonic_stdlib

Zotonic standard library - a library with hopefully useful functions

Extracted from Zotonic, the Erlang CMS http://zotonic.com/

Installation

Due to historical reasons the library is called z_stdlib. It should be checked out as zotonic_stdlib:

git clone https://github.com/zotonic/z_stdlib.git zotonic_stdlib

The library is also on Hex https://hex.pm/packages/zotonic_stdlib

In your rebar.config file, use Hex (for rebar3):

{deps, [
    zotonic_stdlib
]}.

Or, directly git (rebar2):

{deps, [
    {zotonic_stdlib, ".*", {git, "https://github.com/zotonic/z_stdlib.git", "master"}}
]}.

Modules

The following modules are provided:

z_convert

Conversion routines for:

• all common data types (binary, boolean, integer, etc.).
• dates: to_utc, to_local, iso8601 parsing
• json, convert to simple json constructs
• IP address conversions

z_css

Strict CSS parser and sanitizer.

z_cssmin

CSS minifier

z_dateformat

Routines for formatting dates. Example:

z_dateformat:format({{2008,12,10},{15,30,0}}, "Y-m-d H:i:s", [ {tz, "GMT"} ]).

z_email_dnsbl

Check IP addresses for their presence on DNS block- or allowlists.

z_email_utils

Test if an email address is syntactically valid. Extract email address from a text.

z_filelib

Convenience function to make nested directories.

z_html

HTML routines like escape, unescape, sanitize, etc.

z_ip_address

Match an IP address against lists, check if an IP address is a non routable LAN address.

z_jsmin

JavaScript minimizer, removes spaces, comments and newlines.

z_string

String routines. To uppercase, lowercase, truncate, trim, utf8 checks, and more.

z_svg

SVG sanitizer.

z_tempfile

Temporary file routines. Make tempfiles, including watch dog process to clean up the file.

z_ubf

UBF-A encoding and decoding routines. Safe for atoms and maximum memory size.

z_url

URL encode, decode and more.

z_url_fetch

Fetch the first N bytes of a URL. Protection against too large return body.

z_url_metadata

Fetch URL, extract metadata like mime type, title, description, images etc.

Tests

To run the test set:

make test

All tests should pass.