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diff --git a/.gitignore b/.gitignore
index cbb20b6..850381f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,24 +1,27 @@
+# SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+# SPDX-License-Identifier: LGPL-2.1-only
+
# The directory Mix will write compiled artifacts to.
/_build/
# If you run "mix test --cover", coverage assets end up here.
/cover/
# The directory Mix downloads your dependencies sources to.
/deps/
# Where 3rd-party dependencies like ExDoc output generated docs.
/doc/
# Ignore .fetch files in case you like to edit your project deps locally.
/.fetch
# If the VM crashes, it generates a dump, let's ignore it too.
erl_crash.dump
# Also ignore archive artifacts (built via "mix archive.build").
*.ez
priv/*
!priv/.gitignore
bench/snapshots
package-test
diff --git a/.gitmodules b/.gitmodules
index f78be16..c842c8c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,7 @@
+# SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+# SPDX-License-Identifier: LGPL-2.1-only
+
[submodule "c_src/lexbor"]
path = c_src/lexbor
url = https://github.com/lanodan/lexbor.git
branch = bugfix/gcc-10
diff --git a/LICENSE b/LICENSE
deleted file mode 100644
index 6a67a0d..0000000
--- a/LICENSE
+++ /dev/null
@@ -1,458 +0,0 @@
- GNU LESSER GENERAL PUBLIC LICENSE
- Version 2.1, February 1999
-
- Copyright (C) 1991, 1999 Free Software Foundation, Inc.
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
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- the version number 2.1.)
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-freedom to share and change it. By contrast, the GNU General Public
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-free software--to make sure the software is free for all its users.
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-specially designated software packages--typically libraries--of the
-Free Software Foundation and other authors who decide to use it. You
-can use it too, but we suggest you first think carefully about whether
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diff --git a/LICENSES/LGPL-2.1-only.txt b/LICENSES/LGPL-2.1-only.txt
new file mode 100644
index 0000000..c9aa530
--- /dev/null
+++ b/LICENSES/LGPL-2.1-only.txt
@@ -0,0 +1,175 @@
+GNU LESSER GENERAL PUBLIC LICENSE
+
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts as the successor of the GNU Library Public License, version 2, hence the version number 2.1.]
+
+Preamble
+
+The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public Licenses are intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users.
+
+This license, the Lesser General Public License, applies to some specially designated software packages--typically libraries--of the Free Software Foundation and other authors who decide to use it. You can use it too, but we suggest you first think carefully about whether this license or the ordinary General Public License is the better strategy to use in any particular case, based on the explanations below.
+
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+
+When a program is linked with a library, whether statically or using a shared library, the combination of the two is legally speaking a combined work, a derivative of the original library. The ordinary General Public License therefore permits such linking only if the entire combination fits its criteria of freedom. The Lesser General Public License permits more lax criteria for linking other code with the library.
+
+We call this license the "Lesser" General Public License because it does Less to protect the user's freedom than the ordinary General Public License. It also provides other free software developers Less of an advantage over competing non-free programs. These disadvantages are the reason we use the ordinary General Public License for many libraries. However, the Lesser license provides advantages in certain special circumstances.
+
+For example, on rare occasions, there may be a special need to encourage the widest possible use of a certain library, so that it becomes a de-facto standard. To achieve this, non-free programs must be allowed to use the library. A more frequent case is that a free library does the same job as widely used non-free libraries. In this case, there is little to gain by limiting the free library to free software only, so we use the Lesser General Public License.
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+
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+
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diff --git a/Makefile b/Makefile
index 67abc30..87c0f41 100644
--- a/Makefile
+++ b/Makefile
@@ -1,56 +1,59 @@
+# SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+# SPDX-License-Identifier: LGPL-2.1-only
+
MIX = mix
CMAKE = cmake
CNODE_CFLAGS = -g -O2 -std=c99 -pedantic -Wcomment -Wextra -Wno-old-style-declaration -Wall
# ignore unused parameter warnings
CNODE_CFLAGS += -Wno-unused-parameter
# set erlang include path
ERLANG_PATH = $(shell erl -eval 'io:format("~s", [lists:concat([code:root_dir(), "/erts-", erlang:system_info(version)])])' -s init stop -noshell)
CNODE_CFLAGS += -I$(ERLANG_PATH)/include
# expecting myhtml as a submodule in c_src/
# that way we can pin a version and package the whole thing in hex
# hex does not allow for non-app related dependencies.
LXB_PATH = c_src/lexbor
LXB_STATIC = $(LXB_PATH)/liblexbor_static.a
CNODE_CFLAGS += -I$(LXB_PATH)/source
# avoid undefined reference errors to phtread_mutex_trylock
CNODE_CFLAGS += -lpthread
# C-Node
ERL_INTERFACE = $(wildcard $(ERLANG_PATH)/../lib/erl_interface-*)
CNODE_CFLAGS += -L$(ERL_INTERFACE)/lib
CNODE_CFLAGS += -I$(ERL_INTERFACE)/include
CNODE_LDFLAGS =
ifeq ($(OTP22_DEF),YES)
CNODE_CFLAGS += -DOTP_22_OR_NEWER
else
CNODE_LDFLAGS += -lerl_interface
endif
CNODE_LDFLAGS += -lei -pthread
.PHONY: all
all: priv/fasthtml_worker
$(LXB_STATIC): $(LXB_PATH)
# Sadly, build components separately seems to sporadically fail
cd $(LXB_PATH); cmake -DLEXBOR_BUILD_SEPARATELY=OFF -DLEXBOR_BUILD_SHARED=OFF
$(MAKE) -C $(LXB_PATH)
priv/fasthtml_worker: c_src/fasthtml_worker.c $(LXB_STATIC)
mkdir -p priv
$(CC) -o $@ $< $(LXB_STATIC) $(CNODE_CFLAGS) $(CNODE_LDFLAGS)
clean: clean-myhtml
$(RM) -r priv/myhtmlex*
$(RM) priv/fasthtml_worker
$(RM) myhtmlex-*.tar
$(RM) -r package-test
clean-myhtml:
$(MAKE) -C $(MYHTML_PATH) clean
diff --git a/README.md b/README.md
index 16a31ea..c5d5f9d 100644
--- a/README.md
+++ b/README.md
@@ -1,29 +1,34 @@
+<!--
+SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+SPDX-License-Identifier: LGPL-2.1-only
+-->
+
# FastHTML
A C Node wrapping lexborisov's [myhtml](https://github.com/lexborisov/myhtml).
Primarily used with [FastSanitize](https://git.pleroma.social/pleroma/fast_sanitize).
* Available as a hex package: `{:fast_html, "~> 2.0"}`
* [Documentation](https://hexdocs.pm/fast_html/fast_html.html)
## Benchmarks
The following table provides median times it takes to decode a string to a tree for html parsers that can be used from Elixir. Benchmarks were conducted on a machine with an `AMD Ryzen 9 3950X (32) @ 3.500GHz` CPU and 32GB of RAM. The `mix fast_html.bench` task can be used for running the benchmark by yourself.
| File/Parser | fast_html (Port) | mochiweb_html (erlang) | html5ever (Rust NIF) | Myhtmlex (NIF)¹ |
|----------------------|--------------------|------------------------|----------------------|----------------|
| document-large.html (6.9M) | 125.12 ms | 1778.34 ms | 395.21 ms | 327.17 ms |
| document-medium.html (85K) | 1.93 ms | 12.10 ms | 4.74 ms | 3.82 ms |
| document-small.html (25K)| 0.50 ms | 2.76 ms | 1.72 ms | 1.19 ms |
| fragment-large.html (33K)| 0.93 ms | 4.78 ms | 2.34 ms | 2.15 ms |
| fragment-small.html² (757B)| 44.60 μs | 42.13 μs | 43.58 μs | 289.71 μs |
Full benchmark output can be seen in [this snippet](https://git.pleroma.social/pleroma/elixir-libraries/fast_html/snippets/3128)
1. Myhtmlex has a C-Node mode, but it wasn't benchmarked here because it segfaults on `document-large.html`
2. The slowdown on `fragment-small.html` is due to Port overhead. Unlike html5ever and Myhtmlex in NIF mode, `fast_html` has the parser process isolated and communicates with it over stdio, so even if a fatal crash in the parser happens, it won't bring down the entire VM.
## Contribution / Bug Reports
* Please make sure you do `git submodule update` after a checkout/pull
* The project aims to be fully tested
diff --git a/config/config.exs b/config/config.exs
index 6c2ac2a..522e3d9 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -1,30 +1,33 @@
+# SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+# SPDX-License-Identifier: LGPL-2.1-only
+
# This file is responsible for configuring your application
# and its dependencies with the aid of the Mix.Config module.
use Mix.Config
# This configuration is loaded before any dependency and is restricted
# to this project. If another project depends on this project, this
# file won't be loaded nor affect the parent project. For this reason,
# if you want to provide default values for your application for
# 3rd-party users, it should be done in your "mix.exs" file.
# You can configure your application as:
#
# config :myhtmlex, key: :value
#
# and access this configuration in your application as:
#
# Application.get_env(:myhtmlex, :key)
#
# You can also configure a 3rd-party app:
#
# config :logger, level: :info
#
# It is also possible to import configuration files, relative to this
# directory. For example, you can emulate configuration per environment
# by uncommenting the line below and defining dev.exs, test.exs and such.
# Configuration from the imported file will override the ones defined
# here (which is why it is important to import them last).
#
# import_config "#{Mix.env}.exs"
diff --git a/lib/fast_html.ex b/lib/fast_html.ex
index 89f5919..723778e 100644
--- a/lib/fast_html.ex
+++ b/lib/fast_html.ex
@@ -1,147 +1,150 @@
+# SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+# SPDX-License-Identifier: LGPL-2.1-only
+
defmodule :fast_html do
@moduledoc """
A module to decode html into a tree structure.
"""
@type tag() :: String.t() | atom()
@type attr() :: {String.t(), String.t()}
@type attr_list() :: [] | [attr()]
@type comment_node() :: {:comment, String.t()}
@type comment_node3() :: {:comment, [], String.t()}
@type tree() ::
{tag(), attr_list(), tree()}
| {tag(), attr_list(), nil}
| comment_node()
| comment_node3()
@type format_flag() :: :html_atoms | :nil_self_closing | :comment_tuple3
@doc """
Returns a tree representation from the given html string.
`opts` is a keyword list of options, the options available:
* `timeout` - Call timeout. If pooling is used and the worker doesn't return
the result in time, the worker will be killed with a warning.
* `format` - Format flags for the tree.
The following format flags are available:
* `:html_atoms` uses atoms for known html tags (faster), binaries for everything else.
* `:nil_self_closing` uses `nil` to designate void elements.
For example `<br>` is then being represented like `{"br", [], nil}`.
See http://w3c.github.io/html-reference/syntax.html#void-elements for a full list of void elements.
* `:comment_tuple3` uses 3-tuple elements for comments, instead of the default 2-tuple element.
## Examples
iex> :fast_html.decode("<h1>Hello world</h1>")
{:ok, [{"html", [], [{"head", [], []}, {"body", [], [{"h1", [], ["Hello world"]}]}]}]}
iex> :fast_html.decode("Hello world", timeout: 0)
{:error, :timeout}
iex> :fast_html.decode("<span class='hello'>Hi there</span>")
{:ok, [{"html", [],
[{"head", [], []},
{"body", [], [{"span", [{"class", "hello"}], ["Hi there"]}]}]}]}
iex> :fast_html.decode("<body><!-- a comment --!></body>")
{:ok, [{"html", [], [{"head", [], []}, {"body", [], [comment: " a comment "]}]}]}
iex> :fast_html.decode("<br>")
{:ok, [{"html", [], [{"head", [], []}, {"body", [], [{"br", [], []}]}]}]}
iex> :fast_html.decode("<h1>Hello world</h1>", format: [:html_atoms])
{:ok, [{:html, [], [{:head, [], []}, {:body, [], [{:h1, [], ["Hello world"]}]}]}]}
iex> :fast_html.decode("<br>", format: [:nil_self_closing])
{:ok, [{"html", [], [{"head", [], []}, {"body", [], [{"br", [], nil}]}]}]}
iex> :fast_html.decode("<body><!-- a comment --!></body>", format: [:comment_tuple3])
{:ok, [{"html", [], [{"head", [], []}, {"body", [], [{:comment, [], " a comment "}]}]}]}
iex> html = "<body><!-- a comment --!><unknown /></body>"
iex> :fast_html.decode(html, format: [:html_atoms, :nil_self_closing, :comment_tuple3])
{:ok, [{:html, [],
[{:head, [], []},
{:body, [], [{:comment, [], " a comment "}, {"unknown", [], []}]}]}]}
"""
@spec decode(String.t(), format: [format_flag()]) ::
{:ok, tree()} | {:error, String.t() | atom()}
def decode(bin, opts \\ []) do
flags = Keyword.get(opts, :format, [])
timeout = Keyword.get(opts, :timeout, 10000)
find_and_use_port({:decode, bin, flags}, timeout, opts)
end
@doc """
Like `decode/2`, but for parsing [HTML fragments](https://html.spec.whatwg.org/multipage/parsing.html#parsing-html-fragments).
`opts` is a keyword list of options, the options available are the same as in `decode/2` with addition of:
* `context` - Name of the context element, defaults to `div`
Example:
iex> :fast_html.decode_fragment("rin is the <i>best</i> girl")
{:ok, ["rin is the ", {"i", [], ["best"]}, " girl"]}
iex> :fast_html.decode_fragment("rin is the <i>best</i> girl", context: "title")
{:ok, ["rin is the <i>best</i> girl"]}
iex> :fast_html.decode_fragment("rin is the <i>best</i> girl", context: "objective_truth")
{:error, :unknown_context_tag}
iex> :fast_html.decode_fragment("rin is the <i>best</i> girl", format: [:html_atoms])
{:ok, ["rin is the ", {:i, [], ["best"]}, " girl"]}
"""
def decode_fragment(bin, opts \\ []) do
flags = Keyword.get(opts, :format, [])
timeout = Keyword.get(opts, :timeout, 10000)
context = Keyword.get(opts, :context, "div")
find_and_use_port({:decode_fragment, bin, flags, context}, timeout, opts)
end
@default_pool FastHtml.Pool
defp find_and_use_port(term_command, timeout, opts) do
command = :erlang.term_to_binary(term_command)
pool =
cond do
pool = Keyword.get(opts, :pool) -> pool
Application.get_env(:fast_html, :pool, enabled: true)[:enabled] -> @default_pool
true -> nil
end
execute_command_fun = fn port ->
send(port, {self(), {:command, command}})
receive do
{^port, {:data, res}} -> {:ok, res}
after
timeout ->
{:error, :timeout}
end
end
result =
if pool do
FastHtml.Pool.get_port(pool, execute_command_fun)
else
port = open_port()
result = execute_command_fun.(port)
Port.close(port)
result
end
case result do
{:ok, result} -> :erlang.binary_to_term(result)
{:error, _} = e -> e
end
end
def open_port do
Port.open({:spawn_executable, Path.join([:code.priv_dir(:fast_html), "fasthtml_worker"])}, [
:binary,
{:packet, 4},
:use_stdio,
:exit_status
])
end
end
diff --git a/mix.exs b/mix.exs
index 15e1574..a98ac53 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,113 +1,116 @@
+# SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+# SPDX-License-Identifier: LGPL-2.1-only
+
defmodule FastHtml.Mixfile do
use Mix.Project
def project do
[
app: :fast_html,
version: "2.0.5",
elixir: "~> 1.5",
deps: deps(),
package: package(),
compilers: [:elixir_make] ++ Mix.compilers(),
make_env: make_env(),
make_error_message: make_error_message(),
build_embedded: Mix.env() == :prod,
start_permanent: Mix.env() == :prod,
name: "FastHtml",
description: """
A module to decode HTML into a tree,
porting all properties of the underlying
library lexbor, being fast and correct
in regards to the html spec.
""",
docs: docs()
]
end
def package do
[
maintainers: ["Ariadne Conill", "rinpatch"],
- licenses: ["GNU LGPL"],
+ licenses: ["LGPL-2.1-only"],
links: %{
"GitLab" => "https://git.pleroma.social/pleroma/elixir-libraries/fast_html/",
"Issues" => "https://git.pleroma.social/pleroma/elixir-libraries/fast_html/issues",
"lexbor" => "https://github.com/lexbor/lexbor"
},
files: hex_files()
]
end
def application do
[
extra_applications: [:logger],
mod: {FastHtml.Application, []}
]
end
defp deps do
[
# documentation helpers
{:ex_doc, "~> 0.19", only: :dev},
# benchmarking helpers
{:benchee, "~> 1.0", only: :bench, optional: true},
{:dialyxir, "~> 1.0", only: [:dev, :test], runtime: false},
{:myhtmlex, "~> 0.2.0", only: :bench, runtime: false, optional: true},
{:mochiweb, "~> 2.18", only: :bench, optional: true},
{:html5ever,
git: "https://github.com/rusterlium/html5ever_elixir.git", only: :bench, optional: true},
{:nimble_pool, "~> 0.2.0"},
{:elixir_make, "~> 0.4", runtime: false}
]
end
defp docs do
[
main: "readme",
extras: ["README.md", "CHANGELOG.md"]
]
end
defp hex_files do
# This is run every time mix is executed, so it will fail in the hex package,
# therefore check if git is even available
if File.exists?(".git") and System.find_executable("git") do
{files, 0} = System.cmd("git", ["ls-files", "--recurse-submodules"])
files
|> String.split("\n")
# Last element is "", which makes hex include all files in the folder to the project
|> List.delete_at(-1)
|> Enum.reject(fn path ->
Path.dirname(path) == "bench_fixtures" or
(Path.dirname(path) != "priv" and String.starts_with?(Path.basename(path), "."))
end)
else
[]
end
end
defp otp_version do
:erlang.system_info(:otp_release)
|> to_string()
|> String.to_integer()
end
defp otp_22_or_newer? do
otp_version() >= 22
end
defp make_env do
%{
"OTP22_DEF" =>
if otp_22_or_newer?() do
"YES"
else
"NO"
end
}
end
defp make_error_message,
do:
"Please check you have: a C compiler, GNU\Make, CMake and Erlang development headers installed before reporting an issue."
end
diff --git a/mix.lock.license b/mix.lock.license
new file mode 100644
index 0000000..cd7ec38
--- /dev/null
+++ b/mix.lock.license
@@ -0,0 +1,4 @@
+SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+SPDX-FileCopyrightText: 2019-2022 Pleroma Authors
+
+SPDX-License-Identifier: LGPL-2.1-only
diff --git a/test/fast_html_test.exs b/test/fast_html_test.exs
index 63246f1..588732d 100644
--- a/test/fast_html_test.exs
+++ b/test/fast_html_test.exs
@@ -1,165 +1,168 @@
+# SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+# SPDX-License-Identifier: LGPL-2.1-only
+
defmodule :fast_html_test do
use ExUnit.Case
doctest :fast_html
test "doesn't segfault when <!----> is encountered" do
assert {:ok, [{"html", _attrs, _children}]} = :fast_html.decode("<div> <!----> </div>")
end
test "builds a tree, formatted like mochiweb by default" do
assert {:ok,
[
{"html", [],
[
{"head", [], []},
{"body", [],
[
{"br", [], []}
]}
]}
]} = :fast_html.decode("<br>")
end
test "builds a tree, html tags as atoms" do
assert {:ok,
[
{:html, [],
[
{:head, [], []},
{:body, [],
[
{:br, [], []}
]}
]}
]} = :fast_html.decode("<br>", format: [:html_atoms])
end
test "builds a tree, nil self closing" do
assert {:ok,
[
{"html", [],
[
{"head", [], []},
{"body", [],
[
{"br", [], nil},
{"esi:include", [], []}
]}
]}
]} = :fast_html.decode("<br><esi:include />", format: [:nil_self_closing])
end
test "builds a tree, multiple format options" do
assert {:ok,
[
{:html, [],
[
{:head, [], []},
{:body, [],
[
{:br, [], nil}
]}
]}
]} = :fast_html.decode("<br>", format: [:html_atoms, :nil_self_closing])
end
test "attributes" do
assert {:ok,
[
{:html, [],
[
{:head, [], []},
{:body, [],
[
{:span, [{"id", "test"}, {"class", "foo garble"}], []}
]}
]}
]} =
:fast_html.decode(~s'<span id="test" class="foo garble"></span>',
format: [:html_atoms]
)
end
test "single attributes" do
assert {:ok,
[
{:html, [],
[
{:head, [], []},
{:body, [],
[
{:button, [{"disabled", ""}, {"class", "foo garble"}], []}
]}
]}
]} =
:fast_html.decode(~s'<button disabled class="foo garble"></span>',
format: [:html_atoms]
)
end
test "text nodes" do
assert {:ok,
[
{:html, [],
[
{:head, [], []},
{:body, [],
[
"text node"
]}
]}
]} = :fast_html.decode(~s'<body>text node</body>', format: [:html_atoms])
end
test "broken input" do
assert {:ok,
[
{:html, [],
[
{:head, [], []},
{:body, [],
[
{:a, [{"<", ""}], [" asdf"]}
]}
]}
]} = :fast_html.decode(~s'<a <> asdf', format: [:html_atoms])
end
test "custom namespaced tags" do
assert {:ok,
[
{:html, [],
[
{:head, [], []},
{:body, [],
[
{"esi:include", [], []}
]}
]}
]} = :fast_html.decode(~s'<esi:include />', format: [:html_atoms, :nil_self_closing])
end
test "html comments" do
assert {:ok,
[
{:html, [],
[
{:head, [], []},
{:body, [],
[
comment: " a comment "
]}
]}
]} = :fast_html.decode(~s'<body><!-- a comment --></body>', format: [:html_atoms])
end
test "doesn't go into an infinite loop when there are more than one root tags" do
assert {:ok, [{:comment, " a comment "}, {"html", [], [{"head", [], []}, {"body", [], []}]}]} ==
:fast_html.decode("<!-- a comment --> <html> </html>")
end
test "doesn't return attribute name in attribute value when the latter is empty" do
assert :fast_html.decode_fragment("<meta content=\"\"/>") ==
{:ok, [{"meta", [{"content", ""}], []}]}
end
end
diff --git a/test/test_helper.exs b/test/test_helper.exs
index 869559e..2f44730 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -1 +1,4 @@
+# SPDX-FileCopyrightText: 2017-2019 myhtmlex authors <https://github.com/Overbryd/myhtmlex>
+# SPDX-License-Identifier: LGPL-2.1-only
+
ExUnit.start()

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