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feat: add decolorize processor (GreptimeTeam#5065)
* feat: add decolorize processor Signed-off-by: Ruihang Xia <[email protected]> * Update src/pipeline/src/etl/processor/cmcd.rs * add crate level integration test Signed-off-by: Ruihang Xia <[email protected]> --------- Signed-off-by: Ruihang Xia <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,195 @@ | ||
| // Copyright 2023 Greptime Team | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| //! Removes ANSI color control codes from the input text. | ||
| //! | ||
| //! Similar to [`decolorize`](https://grafana.com/docs/loki/latest/query/log_queries/#removing-color-codes) | ||
| //! from Grafana Loki and [`strip_ansi_escape_codes`](https://vector.dev/docs/reference/vrl/functions/#strip_ansi_escape_codes) | ||
| //! from Vector VRL. | ||
| use ahash::HashSet; | ||
| use once_cell::sync::Lazy; | ||
| use regex::Regex; | ||
| use snafu::OptionExt; | ||
|
|
||
| use crate::etl::error::{ | ||
| Error, KeyMustBeStringSnafu, ProcessorExpectStringSnafu, ProcessorMissingFieldSnafu, Result, | ||
| }; | ||
| use crate::etl::field::{Fields, OneInputOneOutputField}; | ||
| use crate::etl::processor::{ | ||
| yaml_bool, yaml_new_field, yaml_new_fields, ProcessorBuilder, ProcessorKind, FIELDS_NAME, | ||
| FIELD_NAME, IGNORE_MISSING_NAME, | ||
| }; | ||
| use crate::etl::value::Value; | ||
|
|
||
| pub(crate) const PROCESSOR_DECOLORIZE: &str = "decolorize"; | ||
|
|
||
| static RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"\x1b\[[0-9;]*m").unwrap()); | ||
|
|
||
| #[derive(Debug, Default)] | ||
| pub struct DecolorizeProcessorBuilder { | ||
| fields: Fields, | ||
| ignore_missing: bool, | ||
| } | ||
|
|
||
| impl ProcessorBuilder for DecolorizeProcessorBuilder { | ||
| fn output_keys(&self) -> HashSet<&str> { | ||
| self.fields | ||
| .iter() | ||
| .map(|f| f.target_or_input_field()) | ||
| .collect() | ||
| } | ||
|
|
||
| fn input_keys(&self) -> HashSet<&str> { | ||
| self.fields.iter().map(|f| f.input_field()).collect() | ||
| } | ||
|
|
||
| fn build(self, intermediate_keys: &[String]) -> Result<ProcessorKind> { | ||
| self.build(intermediate_keys).map(ProcessorKind::Decolorize) | ||
| } | ||
| } | ||
|
|
||
| impl DecolorizeProcessorBuilder { | ||
| fn build(self, intermediate_keys: &[String]) -> Result<DecolorizeProcessor> { | ||
| let mut real_fields = vec![]; | ||
| for field in self.fields.into_iter() { | ||
| let input = OneInputOneOutputField::build( | ||
| "decolorize", | ||
| intermediate_keys, | ||
| field.input_field(), | ||
| field.target_or_input_field(), | ||
| )?; | ||
| real_fields.push(input); | ||
| } | ||
| Ok(DecolorizeProcessor { | ||
| fields: real_fields, | ||
| ignore_missing: self.ignore_missing, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| /// Remove ANSI color control codes from the input text. | ||
| #[derive(Debug, Default)] | ||
| pub struct DecolorizeProcessor { | ||
| fields: Vec<OneInputOneOutputField>, | ||
| ignore_missing: bool, | ||
| } | ||
|
|
||
| impl DecolorizeProcessor { | ||
| fn process_string(&self, val: &str) -> Result<Value> { | ||
| Ok(Value::String(RE.replace_all(val, "").into_owned())) | ||
| } | ||
|
|
||
| fn process(&self, val: &Value) -> Result<Value> { | ||
| match val { | ||
| Value::String(val) => self.process_string(val), | ||
| _ => ProcessorExpectStringSnafu { | ||
| processor: PROCESSOR_DECOLORIZE, | ||
| v: val.clone(), | ||
| } | ||
| .fail(), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl TryFrom<&yaml_rust::yaml::Hash> for DecolorizeProcessorBuilder { | ||
| type Error = Error; | ||
|
|
||
| fn try_from(value: &yaml_rust::yaml::Hash) -> Result<Self> { | ||
| let mut fields = Fields::default(); | ||
| let mut ignore_missing = false; | ||
|
|
||
| for (k, v) in value.iter() { | ||
| let key = k | ||
| .as_str() | ||
| .with_context(|| KeyMustBeStringSnafu { k: k.clone() })?; | ||
|
|
||
| match key { | ||
| FIELD_NAME => { | ||
| fields = Fields::one(yaml_new_field(v, FIELD_NAME)?); | ||
| } | ||
| FIELDS_NAME => { | ||
| fields = yaml_new_fields(v, FIELDS_NAME)?; | ||
| } | ||
| IGNORE_MISSING_NAME => { | ||
| ignore_missing = yaml_bool(v, IGNORE_MISSING_NAME)?; | ||
| } | ||
| _ => {} | ||
| } | ||
| } | ||
|
|
||
| Ok(DecolorizeProcessorBuilder { | ||
| fields, | ||
| ignore_missing, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| impl crate::etl::processor::Processor for DecolorizeProcessor { | ||
| fn kind(&self) -> &str { | ||
| PROCESSOR_DECOLORIZE | ||
| } | ||
|
|
||
| fn ignore_missing(&self) -> bool { | ||
| self.ignore_missing | ||
| } | ||
|
|
||
| fn exec_mut(&self, val: &mut Vec<Value>) -> Result<()> { | ||
| for field in self.fields.iter() { | ||
| let index = field.input_index(); | ||
| match val.get(index) { | ||
| Some(Value::Null) | None => { | ||
| if !self.ignore_missing { | ||
| return ProcessorMissingFieldSnafu { | ||
| processor: self.kind(), | ||
| field: field.input_name(), | ||
| } | ||
| .fail(); | ||
| } | ||
| } | ||
| Some(v) => { | ||
| let result = self.process(v)?; | ||
| let output_index = field.output_index(); | ||
| val[output_index] = result; | ||
| } | ||
| } | ||
| } | ||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| #[cfg(test)] | ||
| mod tests { | ||
| use super::*; | ||
|
|
||
| #[test] | ||
| fn test_decolorize_processor() { | ||
| let processor = DecolorizeProcessor { | ||
| fields: vec![], | ||
| ignore_missing: false, | ||
| }; | ||
|
|
||
| let val = Value::String("\x1b[32mGreen\x1b[0m".to_string()); | ||
| let result = processor.process(&val).unwrap(); | ||
| assert_eq!(result, Value::String("Green".to_string())); | ||
|
|
||
| let val = Value::String("Plain text".to_string()); | ||
| let result = processor.process(&val).unwrap(); | ||
| assert_eq!(result, Value::String("Plain text".to_string())); | ||
|
|
||
| let val = Value::String("\x1b[46mfoo\x1b[0m bar".to_string()); | ||
| let result = processor.process(&val).unwrap(); | ||
| assert_eq!(result, Value::String("foo bar".to_string())); | ||
| } | ||
| } |
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