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use std::error::Error as StdError;
use axum::{
body::Body,
extract::{Path, Request, State},
response::IntoResponse,
routing, Router,
};
use bytes::{Bytes, BytesMut};
use csv::WriterBuilder;
use futures_util::StreamExt;
use log::error;
use serde::{Deserialize, Serialize};
use serde_json::Deserializer;
use sylvia_iot_corelib::err::ErrResp;
use super::{super::State as AppState, api_bridge, list_api_bridge, ListResp};
#[derive(Deserialize)]
struct DataIdPath {
data_id: String,
}
#[derive(Deserialize, Serialize)]
struct DlDataBuffer {
#[serde(rename = "dataId")]
#[serde(rename = "unitId")]
unit_id: String,
#[serde(rename = "applicationId")]
application_id: String,
#[serde(rename = "applicationCode")]
application_code: String,
#[serde(rename = "deviceId")]
device_id: String,
#[serde(rename = "networkId")]
network_id: String,
#[serde(rename = "createdAt")]
created_at: String,
#[serde(rename = "expiredAt")]
expired_at: String,
const CSV_FIELDS: &'static [u8] =
b"\xEF\xBB\xBFdataId,unitId,applicationId,applicationCode,deviceId,networkId,createdAt,expiredAt\n";
pub fn new_service(scope_path: &str, state: &AppState) -> Router {
Router::new().nest(
scope_path,
Router::new()
.route("/count", routing::get(get_dldata_buffer_count))
.route("/list", routing::get(get_dldata_buffer_list))
.route("/{data_id}", routing::delete(delete_dldata_buffer))
.with_state(state.clone()),
)
/// `GET /{base}/api/v1/dldata-buffer/count`
async fn get_dldata_buffer_count(state: State<AppState>, req: Request) -> impl IntoResponse {
const FN_NAME: &'static str = "get_dldata_buffer_count";
let api_path = format!("{}/api/v1/dldata-buffer/count", state.broker_base.as_str());
let client = state.client.clone();
api_bridge(FN_NAME, &client, req, api_path.as_str()).await
/// `GET /{base}/api/v1/dldata-buffer/list`
async fn get_dldata_buffer_list(state: State<AppState>, req: Request) -> impl IntoResponse {
const FN_NAME: &'static str = "get_dldata_buffer_list";
let api_path = format!("{}/api/v1/dldata-buffer/list", state.broker_base.as_str());
let api_path = api_path.as_str();
let (api_resp, resp_builder) =
match list_api_bridge(FN_NAME, &client, req, api_path, false, "dldata-buffer").await {
ListResp::Axum(resp) => return resp,
ListResp::ArrayStream(api_resp, resp_builder) => (api_resp, resp_builder),
let mut resp_stream = api_resp.bytes_stream();
let body = Body::from_stream(async_stream::stream! {
yield Ok(Bytes::from(CSV_FIELDS));
let mut buffer = BytesMut::new();
while let Some(body) = resp_stream.next().await {
match body {
Err(e) => {
error!("[{}] get body error: {}", FN_NAME, e);
let err: Box<dyn StdError + Send + Sync> = Box::new(e);
yield Err(err);
break;
Ok(body) => buffer.extend_from_slice(&body[..]),
let mut json_stream =
Deserializer::from_slice(&buffer[..]).into_iter::<DlDataBuffer>();
let mut index = 0;
let mut finish = false;
loop {
if let Some(Ok(v)) = json_stream.next() {
let mut writer = WriterBuilder::new().has_headers(false).from_writer(vec![]);
if let Err(e) = writer.serialize(v) {
finish = true;
match writer.into_inner() {
Ok(row) => yield Ok(Bytes::copy_from_slice(row.as_slice())),
continue;
let offset = json_stream.byte_offset();
if buffer.len() <= index + offset {
index = buffer.len();
match buffer[index+offset] {
b'[' | b',' => {
index += offset + 1;
if buffer.len() <= index {
json_stream =
Deserializer::from_slice(&buffer[index..]).into_iter::<DlDataBuffer>();
b']' => {
_ => break,
if finish {
buffer = buffer.split_off(index);
});
match resp_builder.body(body) {
Err(e) => ErrResp::ErrRsc(Some(e.to_string())).into_response(),
Ok(resp) => resp,
/// `DELETE /{base}/api/v1/dldata-buffer/{dataId}`
async fn delete_dldata_buffer(
state: State<AppState>,
Path(param): Path<DataIdPath>,
req: Request,
) -> impl IntoResponse {
const FN_NAME: &'static str = "delete_dldata_buffer";
let api_path = format!(
"{}/api/v1/dldata-buffer/{}",
state.broker_base, param.data_id
);