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use std::ops::Range; use regex::{Captures, Regex, Match}; use crate::{Config, path_utils, Profile, Request, ResponseStore, Result, FhttpError}; use crate::random_numbers::random_int; use crate::RE_REQUEST; use uuid::Uuid; pub trait VariableSupport { fn get_env_vars(&self) -> Vec<(&str, Range<usize>)>; fn replace_variables( &mut self, profile: &Profile, config: &Config, response_store: &ResponseStore, ) -> Result<()>; } impl VariableSupport for Request { fn get_env_vars(&self) -> Vec<(&str, Range<usize>)> { lazy_static! { static ref RE_ENV: Regex = Regex::new(r"(?m)\$\{env\(([^}]+)\)}").unwrap(); }; RE_ENV.captures_iter(&self.text) .collect::<Vec<Captures>>() .into_iter() .rev() .map(|capture| { let group = capture.get(0).unwrap(); let key = capture.get(1).unwrap().as_str(); (key, group.start()..group.end()) }) .collect() } fn replace_variables( &mut self, profile: &Profile, config: &Config, response_store: &ResponseStore, ) -> Result<()> { _replace_env_vars(self, profile, config, response_store)?; _replace_uuids(self); _replace_random_ints(self)?; _replace_request_dependencies(self, &response_store); Ok(()) } } fn _replace_env_vars( req: &mut Request, profile: &Profile, config: &Config, response_store: &ResponseStore, ) -> Result<()> { let variables = req.get_env_vars(); if !variables.is_empty() { let mut buffer = req.text.clone(); for (key, range) in variables { let value = profile.get(key, config, response_store)?; buffer.replace_range(range, &value); } req.text = buffer; } Ok(()) } fn _replace_uuids(req: &mut Request) { lazy_static! { static ref RE_ENV: Regex = Regex::new(r"(?m)\$\{uuid\(\)}").unwrap(); }; let reversed_captures: Vec<Captures> = RE_ENV.captures_iter(&req.text) .collect::<Vec<_>>() .into_iter() .rev() .collect(); if !reversed_captures.is_empty() { let mut buffer = req.text.clone(); for capture in reversed_captures { let group = capture.get(0).unwrap(); let range = group.start()..group.end(); let value = Uuid::new_v4().to_string(); buffer.replace_range(range, &value); } req.text = buffer; } } fn _replace_random_ints(req: &mut Request) -> Result<()> { lazy_static! { static ref RE_ENV: Regex = Regex::new(r"(?m)\$\{randomInt\(\s*([+-]?\d+)?\s*(,\s*([+-]?\d+)\s*)?\)}").unwrap(); }; let reversed_captures: Vec<Captures> = RE_ENV.captures_iter(&req.text) .collect::<Vec<_>>() .into_iter() .rev() .collect(); if !reversed_captures.is_empty() { let mut buffer = req.text.clone(); for capture in reversed_captures { let group = capture.get(0).unwrap(); let (min, max) = _parse_min_max( capture.get(1), capture.get(3) )?; let range = group.start()..group.end(); let value = random_int(min, max); buffer.replace_range(range, &value.to_string()); } req.text = buffer; } Ok(()) } fn _parse_min_max( min: Option<Match>, max: Option<Match> ) -> Result<(i32, i32)> { let ret_min = min .map(|m| m.as_str().parse::<i32>()) .unwrap_or(Ok(0)) .map_err(|_| FhttpError::new( format!("min param out of bounds: {}..{}", std::i32::MIN, std::i32::MAX) ))?; let ret_max = max .map(|m| m.as_str().parse::<i32>()) .unwrap_or(Ok(std::i32::MAX)) .map_err(|_| FhttpError::new( format!("max param out of bounds: {}..{}", std::i32::MIN, std::i32::MAX) ))?; if ret_max < ret_min { Err(FhttpError::new("min cannot be greater than max")) } else { Ok((ret_min, ret_max)) } } fn _replace_request_dependencies( req: &mut Request, response_store: &ResponseStore ) { let reversed_captures = RE_REQUEST.captures_iter(&req.text) .collect::<Vec<_>>() .into_iter() .rev() .collect::<Vec<_>>(); if !reversed_captures.is_empty() { let mut buffer = req.text.clone(); for capture in reversed_captures { let whole_match = capture.get(0).unwrap(); let range = whole_match.start()..whole_match.end(); let group = capture.get(1).unwrap(); let path = path_utils::get_dependency_path(&req.source_path, &group.as_str()); buffer.replace_range(range, &response_store.get(&path)); } req.text = buffer; } } #[cfg(test)] mod replace_variables { use std::env; use indoc::indoc; use super::*; #[test] fn should_replace_env_vars() -> Result<()> { env::set_var("SERVER", "server"); env::set_var("TOKEN", "token"); env::set_var("BODY", "body"); let mut req = Request::new( env::current_dir().unwrap(), indoc!(r##" GET http://${env(SERVER)} Authorization: ${env(TOKEN)} X${env(BODY)}X "##) ); req.replace_variables( &Profile::empty(env::current_dir().unwrap()), &Config::default(), &ResponseStore::new() )?; assert_eq!( &req.text, indoc!(r##" GET http://server Authorization: token XbodyX "##) ); Ok(()) } #[test] fn should_replace_uuids() -> Result<()> { use regex::Regex; lazy_static! { static ref REGEX: Regex = Regex::new(r"X[a-z0-9]{8}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{12}X").unwrap(); }; let mut req = Request::new( env::current_dir().unwrap(), indoc!(r##" GET http://X${uuid()}X "##) ); req.replace_variables( &Profile::empty(env::current_dir().unwrap()), &Config::default(), &ResponseStore::new() )?; assert!(REGEX.is_match(&req.text)); Ok(()) } }