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|
use anyhow::{bail, Context, Result};
use log::{debug, error, info, warn, LevelFilter};
use rouille::{Request, Response};
use serde::{Deserialize, Serialize};
use std::collections::BTreeSet;
use std::env;
use std::net::SocketAddr;
use std::time::{SystemTime, UNIX_EPOCH};
use uuid::Uuid;
mod yandex_log;
/// Represents the request sent by the frontend application.
#[derive(Debug, Deserialize)]
struct FrontendReq {
captcha_token: String,
record: Record,
}
/// Represents a single record as filled in by a user. This is the
/// primary data structure we want to populate and persist somewhere.
#[derive(Debug, Deserialize, Serialize)]
struct Record {
// Record-specific metadata
uuid: Uuid,
// Personal information
name: String,
email: String,
citizenship: String, // TODO
personal_details: String,
// Job information
position: String,
technologies: BTreeSet<String>,
job_details: String,
work_background: String,
}
impl Record {
fn validate(&self) -> bool {
true
}
}
fn validate_captcha(token: &str) -> Result<()> {
// TODO(tazjin): pass `ip` parameter
let url = "https://smartcaptcha.yandexcloud.net/validate";
let backend_key =
env::var("YANDEX_SMARTCAPTCHA_KEY").context("captcha verification key not provided")?;
#[derive(Deserialize)]
struct CaptchaResponse {
status: String,
message: String,
}
let response: CaptchaResponse = attohttpc::get(url)
.param("secret", backend_key)
.param("token", token)
.send()
.context("failed to send captcha verification request")?
.error_for_status()
.context("captcha verification request failed")?
.json()
.context("failed to deserialize captcha verification response")?;
if response.status != "ok" {
warn!(
"invalid captcha: {} ({})",
response.message, response.status
);
}
info!("captcha token was valid");
Ok(())
}
fn persist_record(ip: &SocketAddr, record: &Record) -> Result<()> {
let bucket_name = "rih-backend-data";
let credentials =
s3::creds::Credentials::from_env().context("failed to initialise storage credentials")?;
let yandex_region: s3::Region = s3::Region::Custom {
region: "ru-central1".to_string(),
endpoint: "storage.yandexcloud.net".to_string(),
};
let bucket = s3::Bucket::new(bucket_name, yandex_region, credentials)
.context("failed to initialise storage client")?;
let path_uuid = Uuid::new_v4();
let epoch = SystemTime::now()
.duration_since(UNIX_EPOCH)
.context("failed to get current time")?
.as_secs();
let path = format!("/records/{}-{}.json", epoch, path_uuid);
info!("writing record to '{}'", path);
let data = serde_json::json!({
"ip": ip.to_string(),
"record": record,
});
let response = bucket
.put_object(path, data.to_string().as_bytes())
.context("failed to persist storage object")?;
debug!(
"Object Storage response: ({}) {}",
response.status_code(),
response.as_str().unwrap_or("<unprintable>")
);
Ok(())
}
fn handle_submit(req: &Request) -> Result<Response> {
let submitted: FrontendReq =
rouille::input::json::json_input(req).context("failed to deserialise frontend request")?;
validate_captcha(&submitted.captcha_token)?;
if !submitted.record.validate() {
bail!("invalid record: {:?}", submitted.record);
}
persist_record(req.remote_addr(), &submitted.record).context("failed to persist record")?;
Ok(Response::text("success"))
}
fn main() -> Result<()> {
log::set_logger(&yandex_log::YANDEX_CLOUD_LOGGER)
.map(|()| log::set_max_level(LevelFilter::Info))
.expect("log configuration must succeed");
let port = env::var("PORT").unwrap_or_else(|_| /* rihb = */ "7442".to_string());
let listen = format!("0.0.0.0:{port}");
info!("launching rih-backend on: {}", listen);
rouille::start_server(&listen, move |request| {
if request.method() == "POST" && request.url() == "/submit" {
info!("handling submit request from {}", request.remote_addr());
match handle_submit(request) {
Ok(response) => {
info!("submit handled successfully");
response
}
Err(err) => {
error!("failed to handle submit: {}", err);
Response::empty_400()
}
}
} else {
warn!(
"no matching route for request: {} {}",
request.method(),
request.url()
);
Response::empty_404()
}
});
}
|
