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|
use std::matches;
use std::str::FromStr;
use std::{error::Error, fmt};
#[derive(Debug)]
struct BarbParseError {}
impl Error for BarbParseError {}
impl fmt::Display for BarbParseError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "Error parsing barb file")
}
}
enum Method {
GET,
PUT,
POST,
PATCH,
DELETE,
}
impl FromStr for Method {
type Err = BarbParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"GET" => Ok(Self::GET),
"PUT" => Ok(Self::PUT),
"POST" => Ok(Self::POST),
"PATCH" => Ok(Self::PATCH),
"DELETE" => Ok(Self::DELETE),
_ => Err(BarbParseError {}),
}
}
}
#[derive(Debug)]
struct Header {
name: String,
value: String,
}
impl fmt::Display for Header {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}: {}", self.name, self.value)
}
}
struct BarbHeader {
pub method: Method,
pub url: String,
pub headers: Vec<Header>,
pub filter: Option<String>,
}
impl BarbHeader {
fn new(method: Method, url: String, headers: Vec<Header>, filter: Option<String>) -> Self {
BarbHeader {
method: method,
url: url,
headers: headers,
filter: filter,
}
}
}
struct BarbFile {
header: BarbHeader,
body: Option<String>,
}
fn decode_url_line(line: &str) -> Result<(Method, String), BarbParseError> {
let mut components = line[1..].split('^');
let meth = components.next().ok_or(BarbParseError {})?;
let url = components.next().ok_or(BarbParseError {})?;
return Ok((Method::from_str(meth)?, String::from(url)));
}
fn decode_header(line: &str) -> Result<Header, BarbParseError> {
let mut components = line[1..].split(':');
let header_name = components.next().ok_or(BarbParseError {})?;
let header_val = components.next().ok_or(BarbParseError {})?.trim();
Ok(Header {
name: String::from(header_name),
value: String::from(header_val),
})
}
impl FromStr for BarbFile {
type Err = BarbParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut lines = s.split('\n');
let (method, url) = decode_url_line(lines.next().ok_or(BarbParseError {})?)?;
let mut headers: Vec<Header> = vec![];
let mut filter = None;
for line in lines {
if !matches!(line.chars().nth(0), Some('#')) {
break; // Reached the end of the header.
}
if let Some(_) = line.find(':') {
headers.push(decode_header(line).unwrap());
}
if let None = filter {
filter = match &line[0..2] {
"#|" => Some(String::from(&line[2..])),
_ => None,
}
}
}
Ok(BarbFile {
header: BarbHeader::new(method, url, headers, filter),
body: None,
})
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_method_from_str() {
assert!(matches!(Method::from_str("GET").unwrap(), Method::GET));
assert!(matches!(Method::from_str("GET").unwrap(), Method::GET));
assert!(matches!(Method::from_str("PUT").unwrap(), Method::PUT));
assert!(matches!(Method::from_str("POST").unwrap(), Method::POST));
assert!(matches!(Method::from_str("PATCH").unwrap(), Method::PATCH));
assert!(matches!(
Method::from_str("DELETE").unwrap(),
Method::DELETE
));
}
#[test]
fn test_decode_url_line() {
let (method, url) = decode_url_line("#GET^http://blahblah").unwrap();
assert!(matches!(method, Method::GET));
assert_eq!(url, "http://blahblah");
}
#[test]
fn test_decode_header() {
let hdr = decode_header("#Authorization: TOKEN 12345").unwrap();
assert_eq!(hdr.name, "Authorization");
assert_eq!(hdr.value, "TOKEN 12345");
}
#[test]
fn test_parse_barbfile() {
let barbfile =
BarbFile::from_str("#GET^https://blah.com/api/blah\n#Authorization: BLAH\n#|filtr\n")
.unwrap();
assert_eq!(barbfile.body, None);
assert!(matches!(barbfile.header.method, Method::GET));
assert_eq!(barbfile.header.url, "https://blah.com/api/blah");
assert_eq!(barbfile.header.filter, Some(String::from("filtr")));
println!("{:?}", barbfile.header.headers);
assert_eq!(barbfile.header.headers.len(), 1);
assert_eq!(barbfile.header.headers[0].name, "Authorization");
assert_eq!(barbfile.header.headers[0].value, "BLAH");
}
}
|
