Code demonstration for getting good stock

main.rs

#[path="models/cafef_liveboard.rs"]
pub mod cafef_liveboard;
use reqwest::header::CONTENT_TYPE;
use reqwest::header::USER_AGENT;
use regex::Regex;
use chrono::prelude::*;
use std::fs::File;
use std::io::{self, BufRead};
use std::path::Path;
use crate::cafef_liveboard::*;
use std::env;
use std::fs;


fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
where P: AsRef<Path>, {
    let file = File::open(filename)?;
    Ok(io::BufReader::new(file).lines())
}


#[tokio::main]
async fn main() ->  Result<(), Box<dyn std::error::Error>> {

    let now: DateTime<Local> = Local::now();
    let three_months_ago_timestamp = (now - chrono::Duration::days(90)).date().and_hms(9, 10, 30).timestamp(); 
    let current_timestamp = now.timestamp();


    let client = reqwest::Client::new();



    if let Ok(lines) = read_lines("./resources/list_stocks.txt") {
        // Consumes the iterator, returns an (Optional) String
        for line in lines {
            if let Ok(ip) = line {

                let mut stack: Vec<f32> = Vec::new();

                let url =format!("https://api.vietstock.vn/ta/history?symbol={ip}&resolution=D&from={start_time}&to={end_time}",ip=ip,start_time=three_months_ago_timestamp,end_time=current_timestamp);

    let res = client.get(url)
                .header(CONTENT_TYPE,"application/x-www-form-urlencoded; charset=UTF-8")
                .header(USER_AGENT,"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:81.0) Gecko/20100101 Firefox/81.0")
                .send()
                .await?;

    let re = Regex::new("\"c.*\"v").unwrap();
    let re_array = Regex::new(r"\[.*\]").unwrap();
    let text = res.text().await?;
    for cap in re.captures_iter(&text){
        let local_text = &cap[0];
        for local_cap in re_array.captures_iter(&local_text){
            let test = &local_cap[0];
            for (_, n) in test
                  .trim_matches(|c| c == '[' || c == ']')
                  .split(',')
                  .enumerate() {

        stack.push(n.trim().parse::<f32>().unwrap());
    }
        }
    }

    let last_price = stack.last().ok_or("no item1")?; 


    for price in stack.iter(){
        if last_price/price < 0.7{
            println!("{}",ip);
            println!("{}",last_price);
            println!("{}",price);
            break;
        }

    }
                
            }
        }
    }


    

     

    Ok(())
}