Function from_str 

pub fn from_str(input: &str) -> Result<Har, Error>

Deserialize a HAR from a string slice.

use har::{from_str, to_json, HarVersion};

let input = r#"{
  "log": {
    "version": "1.2",
    "creator": { "name": "example", "version": "1.0" },
    "entries": []
  }
}"#;

let har = from_str(input)?;
assert_eq!(har.version(), HarVersion::V1_2);
assert!(to_json(&har)?.contains("\"version\": \"1.2\""));