defmodule Sentry.Event do
@moduledoc """
Provides functions to create Sentry events from scratch, from exceptions, and so on.
This module also contains the main event struct. Events are the fundamental data
that clients send to the Sentry server.
See <https://develop.sentry.dev/sdk/event-payloads>.
"""
alias Sentry.{Attachment, Config, Interfaces, Sources, UUID, Options}
@sdk %Interfaces.SDK{
name: "sentry-elixir",
version: Mix.Project.config()[:version]
}
@typedoc """
The level of an event.
"""
@typedoc since: "9.0.0"
@type level() :: :fatal | :error | :warning | :info | :debug
@typedoc """
The type for the event struct.
All of the fields in this struct map directly to the fields described in the
[Sentry documentation](https://develop.sentry.dev/sdk/event-payloads). These fields
are the exceptions, and are specific to the Elixir Sentry SDK:
* `:source` - the source of the event. `Sentry.LoggerBackend` and `Sentry.LoggerHandler`
set this to `:logger`, while `Sentry.PlugCapture` and `Sentry.PlugContext` set it to
`:plug`. You can set it to any atom. See the `:event_source` option in `create_event/1`
and `transform_exception/2`.
* `:original_exception` - the original exception that is being reported, if there's one.
The Elixir Sentry SDK manipulates reported exceptions to make them fit the payload
required by the Sentry API, and these end up in the `:exception` field. The
`:original_exception` field, instead, contains the original exception as the raw Elixir
term (such as `%RuntimeError{...}`).
* `:integration_meta` - a free-form map of integration-specific metadata. Integrations
(such as [the Oban integration](https://docs.sentry.io/platforms/elixir/integrations/oban/))
can set this field to store metadata that
is specific to the integration. This field is not part of the Sentry API payload,
but you can use it for example in [`:before_send`
callbacks](`t:Sentry.before_send_event_callback/0`) to determine whether to report events.
*Available since v10.7.0*.
See also [`%Sentry.Event{}`](`__struct__/0`).
"""
@type t() :: %__MODULE__{
# Required
event_id: <<_::256>>,
timestamp: String.t() | number(),
platform: :elixir,
# Optional
level: level() | nil,
logger: String.t() | nil,
transaction: String.t() | nil,
server_name: String.t() | nil,
release: String.t() | nil,
dist: String.t() | nil,
tags: %{optional(String.t()) => String.t()},
environment: String.t() | nil,
modules: %{optional(String.t()) => String.t()},
extra: map(),
fingerprint: [String.t()],
integration_meta: map(),
# Interfaces.
breadcrumbs: [Interfaces.Breadcrumb.t()],
contexts: Interfaces.context(),
exception: [Interfaces.Exception.t()],
message: Interfaces.Message.t() | nil,
request: Interfaces.Request.t() | nil,
sdk: Interfaces.SDK.t() | nil,
threads: [Interfaces.Thread.t()] | nil,
user: Interfaces.user() | nil,
# Non-payload fields.
source: atom(),
original_exception: Exception.t() | nil,
attachments: [Attachment.t()]
}
@doc """
The struct representing the event.
You're not advised to manipulate this struct's fields directly. Instead,
use functions such as `create_event/1` or `transform_exception/2` for creating
events.
See the `t:t/0` type for information on the fields and their types.
"""
@enforce_keys [:event_id, :timestamp]
defstruct [
# Required. Hexadecimal string representing a uuid4 value. The length is exactly 32
# characters. Dashes are not allowed. Has to be lowercase.
event_id: nil,
# Required. Indicates when the event was created in the Sentry SDK. The format is either a
# string as defined in RFC 3339 or a numeric (integer or float) value representing the number
# of seconds that have elapsed since the Unix epoch.
timestamp: nil,
# Optional fields.
breadcrumbs: [],
contexts: nil,
dist: nil,
environment: "production",
exception: [],
extra: %{},
fingerprint: [],
level: nil,
logger: nil,
message: nil,
modules: %{},
platform: :elixir,
release: nil,
request: %Interfaces.Request{},
sdk: nil,
server_name: nil,
tags: %{},
transaction: nil,
threads: nil,
user: %{},
integration_meta: %{},
# "Culprit" is not documented anymore and we should move to transactions at some point.
# https://forum.sentry.io/t/culprit-deprecated-in-favor-of-what/4871/9
culprit: nil,
# Non-payload "private" fields.
attachments: [],
source: nil,
original_exception: nil
]
# Removes all the non-payload keys from the event so that the client can render
@doc false
@spec remove_non_payload_keys(t()) :: map()
def remove_non_payload_keys(%__MODULE__{} = event) do
event
|> Map.from_struct()
|> Map.drop([:original_exception, :source, :attachments, :integration_meta])
end
@create_event_opts_schema Options.create_event_schema()
@doc """
Creates an event struct out of collected context and options.
> #### Merging Options with Context and Config {: .info}
>
> Some of the options documented below are **merged** with the Sentry context, or
> with the Sentry context *and* the configuration. The option you pass here always
> has higher precedence, followed by the context and finally by the configuration.
>
> See also `Sentry.Context` for information on the Sentry context and `Sentry` for
> information on configuration.
## Options
#{NimbleOptions.docs(@create_event_opts_schema)}
## Examples
iex> event = create_event(exception: %RuntimeError{message: "oops"}, level: :warning)
iex> event.level
:warning
iex> hd(event.exception).type
"RuntimeError"
iex> event.original_exception
%RuntimeError{message: "oops"}
iex> event = create_event(message: "Unknown route", event_source: :plug)
iex> event.source
:plug
"""
@spec create_event([option]) :: t()
when option: unquote(NimbleOptions.option_typespec(@create_event_opts_schema))
def create_event(opts) when is_list(opts) do
opts = NimbleOptions.validate!(opts, @create_event_opts_schema)
timestamp =
DateTime.utc_now()
|> DateTime.truncate(:microsecond)
|> DateTime.to_iso8601()
|> String.trim_trailing("Z")
%{
user: user_context,
tags: tags_context,
extra: extra_context,
breadcrumbs: breadcrumbs_context,
request: request_context,
attachments: attachments_context
} = Sentry.Context.get_all()
extra =
Config.extra()
|> Map.merge(extra_context)
|> Map.merge(Keyword.fetch!(opts, :extra))
user = Map.merge(user_context, Keyword.fetch!(opts, :user))
request = Map.merge(request_context, Keyword.fetch!(opts, :request))
tags =
Config.tags()
|> Map.merge(tags_context)
|> Map.merge(Keyword.fetch!(opts, :tags))
breadcrumbs =
opts
|> Keyword.fetch!(:breadcrumbs)
|> Kernel.++(breadcrumbs_context)
|> Enum.take(-1 * Config.max_breadcrumbs())
|> Enum.map(&struct(Interfaces.Breadcrumb, &1))
message = Keyword.get(opts, :message)
exception = Keyword.get(opts, :exception)
stacktrace = Keyword.get(opts, :stacktrace)
source = Keyword.get(opts, :event_source)
handled? = Keyword.fetch!(opts, :handled)
event = %__MODULE__{
attachments: attachments_context,
breadcrumbs: breadcrumbs,
contexts: generate_contexts(),
culprit: culprit_from_stacktrace(Keyword.get(opts, :stacktrace, [])),
environment: Config.environment_name(),
event_id: UUID.uuid4_hex(),
exception: List.wrap(coerce_exception(exception, stacktrace, message, handled?)),
extra: extra,
fingerprint: Keyword.fetch!(opts, :fingerprint),
level: Keyword.fetch!(opts, :level),
message: message && build_message_interface(message, opts),
modules: :persistent_term.get({:sentry, :loaded_applications}),
original_exception: exception,
release: Config.release(),
request: struct(%Interfaces.Request{}, request),
sdk: @sdk,
server_name: Config.server_name() || to_string(:net_adm.localhost()),
source: source,
tags: tags,
timestamp: timestamp,
user: user,
integration_meta: Keyword.fetch!(opts, :integration_meta)
}
# If we have a message *and* a stacktrace, but no exception, we need to store the stacktrace
# information within a "thread" interface. This is how the Python SDK also does it. An issue
# was opened in the sentry-elixir repo about this, but this is also a Sentry issue (if there
# is an exception of type "message" with a stacktrace *and* a "message" attribute, it should
# still show properly). This issue is now tracked in Sentry itself:
# https://github.com/getsentry/sentry/issues/61239
if message && stacktrace && is_nil(exception) do
add_thread_with_stacktrace(event, stacktrace)
else
event
end
end
defp build_message_interface(raw_message, opts) do
if params = Keyword.get(opts, :interpolation_parameters) do
%Interfaces.Message{
formatted: interpolate(raw_message, params),
message: raw_message,
params: params
}
else
%Interfaces.Message{formatted: raw_message}
end
end
# Made public for testing.
@doc false
def interpolate(message, params) do
parts = Regex.split(~r{%s}, message, include_captures: true, trim: true)
{iodata, _params} =
Enum.reduce(parts, {"", params}, fn
"%s", {acc, [param | rest_params]} ->
cond do
is_binary(param) and String.printable?(param) -> {[acc, param], rest_params}
is_binary(param) -> {[acc, inspect(param)], rest_params}
true -> {[acc, to_string(param)], rest_params}
end
"%s", {acc, []} ->
{[acc, "%s"], []}
part, {acc, params} ->
{[acc, part], params}
end)
IO.iodata_to_binary(iodata)
end
# If we have a message with a stacktrace, but no exceptions, for now we store the stacktrace in
# the "threads" interface and we don't fill in the "exception" interface altogether. This might
# be eventually fixed in Sentry itself: https://github.com/getsentry/sentry/issues/61239
defp coerce_exception(_exception = nil, _stacktrace_or_nil, message, _handled?)
when is_binary(message) do
nil
end
defp coerce_exception(exception, stacktrace_or_nil, _message, handled?)
when is_exception(exception) do
%Interfaces.Exception{
type: inspect(exception.__struct__),
value: Exception.message(exception),
stacktrace: coerce_stacktrace(stacktrace_or_nil),
mechanism: %Interfaces.Exception.Mechanism{handled: handled?}
}
end
defp coerce_exception(_exception = nil, stacktrace, _message = nil, _handled?) do
unless is_nil(stacktrace) do
raise ArgumentError,
"cannot provide a :stacktrace option without an exception or a message, got: #{inspect(stacktrace)}"
end
end
defp add_thread_with_stacktrace(%__MODULE__{} = event, stacktrace) when is_list(stacktrace) do
thread = %Interfaces.Thread{
id: UUID.uuid4_hex(),
stacktrace: coerce_stacktrace(stacktrace)
}
%__MODULE__{event | threads: [thread]}
end
@doc """
Transforms an exception to a Sentry event.
This essentially defers to `create_event/1`.
## Options
This function takes the same options as `create_event/1`, except for the `:exception` option.
"""
@spec transform_exception(Exception.t(), keyword()) :: t()
def transform_exception(exception, opts) when is_exception(exception) and is_list(opts) do
opts
|> Keyword.put(:exception, exception)
|> create_event()
end
defp coerce_stacktrace(nil) do
nil
end
defp coerce_stacktrace(stacktrace) when is_list(stacktrace) do
case stacktrace_to_frames(stacktrace) do
[] -> %Interfaces.Stacktrace{frames: nil}
frames -> %Interfaces.Stacktrace{frames: frames}
end
end
defp stacktrace_to_frames(stacktrace) when is_list(stacktrace) do
in_app_module_allow_list = Config.in_app_module_allow_list()
Enum.reduce(stacktrace, [], fn entry, acc ->
[stacktrace_entry_to_frame(entry, in_app_module_allow_list) | acc]
end)
end
defp stacktrace_entry_to_frame(entry, in_app_module_allow_list) do
{module, function, location} =
case entry do
{mod, function, arity_or_args, location} ->
{mod, Exception.format_mfa(mod, function, arity_to_integer(arity_or_args)), location}
{function, arity_or_args, location} ->
{nil, Exception.format_fa(function, arity_to_integer(arity_or_args)), location}
end
file =
case Keyword.fetch(location, :file) do
{:ok, file} when not is_nil(file) -> to_string(file)
_other -> nil
end
line = location[:line]
frame = %Interfaces.Stacktrace.Frame{
module: module,
function: function,
filename: file,
lineno: line,
in_app: in_app?(entry, in_app_module_allow_list),
vars: args_from_stacktrace([entry])
}
maybe_put_source_context(frame, file, line)
end
# There's no module here.
defp in_app?({_function, _arity_or_args, _location}, _in_app_allow_list), do: false
# No modules are allowed.
defp in_app?(_stacktrace_entry, []), do: false
defp in_app?({module, _function, _arity_or_args, _location}, in_app_module_allow_list) do
split_module = module_split(module)
Enum.any?(in_app_module_allow_list, fn module ->
allowed_split_module = module_split(module)
Enum.take(split_module, length(allowed_split_module)) == allowed_split_module
end)
end
defp module_split(module) do
module
|> Atom.to_string()
|> String.trim_leading("Elixir.")
|> String.split(".")
end
defp maybe_put_source_context(%Interfaces.Stacktrace.Frame{} = frame, file, line) do
cond do
not Config.enable_source_code_context?() ->
frame
source_map_for_file = Sources.get_lines_for_file(file) ->
{pre_context, context, post_context} =
Sources.get_source_context(source_map_for_file, line)
%Interfaces.Stacktrace.Frame{
frame
| context_line: context,
pre_context: pre_context,
post_context: post_context
}
true ->
frame
end
end
defp culprit_from_stacktrace([]), do: nil
defp culprit_from_stacktrace([{m, f, a, _} | _]) do
Exception.format_mfa(m, f, arity_to_integer(a))
end
defp culprit_from_stacktrace([{m, f, a} | _]) do
Exception.format_mfa(m, f, arity_to_integer(a))
end
defp args_from_stacktrace([{_mod, _fun, args, _location} | _rest]) when is_list(args),
do: stacktrace_args_to_vars(args)
defp args_from_stacktrace([{_fun, args, _location} | _rest]) when is_list(args),
do: stacktrace_args_to_vars(args)
defp args_from_stacktrace([_other | _rest]), do: %{}
defp stacktrace_args_to_vars(args) do
for {arg, index} <- Enum.with_index(args), into: %{} do
{"arg#{index}", String.slice(inspect(arg), 0, 513)}
end
end
defp arity_to_integer(arity) when is_list(arity), do: Enum.count(arity)
defp arity_to_integer(arity) when is_integer(arity), do: arity
defp generate_contexts do
{_, os_name} = :os.type()
os_version =
case :os.version() do
{major, minor, release} -> "#{major}.#{minor}.#{release}"
version_string -> version_string
end
%{
os: %{name: Atom.to_string(os_name), version: os_version},
runtime: %{name: "elixir", version: System.build_info().build}
}
end
# Used to compare events for deduplication. See "Sentry.Dedupe".
@doc false
@spec hash(t()) :: non_neg_integer()
def hash(%__MODULE__{} = event) do
:erlang.phash2([
event.exception,
event.message,
event.level,
event.fingerprint,
event.user,
event.tags,
event.extra,
event.breadcrumbs,
event.request,
event.attachments
])
end
@doc false
def __validate_exception__(term, key) do
if is_exception(term) do
{:ok, term}
else
{:error, "expected #{inspect(key)} to be an exception, got: #{inspect(term)}"}
end
end
end
