feature: added http request grammar (#726)

plus tests, benchmark and a fuzzing target

based on #372 by @adamAndMath

Closes #210

Co-authored-by: Adam <adam.and.math@gmail.com>

Co-authored-by: Tomas Tauber <me@tomtau.be>
Co-authored-by: Adam <adam.and.math@gmail.com>

FUZZING.md

@@ -21,11 +21,12 @@ There is a single fuzzing target for this crate that interacts with
 
 ### `pest_grammars`
 
+- `http`
 - `toml`
 - `json`
 
-There are two fuzzing targets for this crate: one tests the json grammar in the
-`json` module and the other tests the toml grammar in the `toml` module. They
+There are three fuzzing targets for this crate: one tests the http request grammar in the `http` module, one tests the json grammar in the
+`json` module and the last one tests the toml grammar in the `toml` module. They
 interact directly with the `pest::Parser::parse` function provided by derived
 on the respective Parsers in each module.
 

grammars/Cargo.toml

@@ -22,4 +22,8 @@ criterion = "0.3"
 
 [[bench]]
 name = "json"
+harness = false
+
+[[bench]]
+name = "http"
 harness = false

grammars/benches/http.rs

@@ -0,0 +1,22 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+
+use std::fs::File;
+use std::io::Read;
+
+use pest::Parser;
+
+use pest_grammars::http::*;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let mut file = File::open("benches/requests.http").unwrap();
+    let mut data = String::new();
+
+    file.read_to_string(&mut data).unwrap();
+
+    c.bench_function("http parser", |b| {
+        b.iter(|| HttpParser::parse(Rule::http, &data).unwrap())
+    });
+}
+
+criterion_group!(benches, criterion_benchmark,);
+criterion_main!(benches);