Add a Docker+wasm sample application featuring a WasmEdge-based microservice, a MySQL database and an Nginx web server for frontend UI files.
Signed-off-by: Michael Yuan <michael@secondstate.io>
This commit is contained in:
Michael Yuan
parent
e3ea3e9044
commit
6fc5abd81d
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@ -49,6 +49,8 @@ application with a Rust backend and a Postgres database. <a href="react-rus
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- [`React / Nginx`](react-nginx) - Sample React application with Nginx. <a href="react-nginx"><img src="icon_devenvs.svg" alt="Use with Docker Dev Environments" height="30" align="top"/></a>
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- [`Spring / PostgreSQL`](spring-postgres) - Sample Java application
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with Spring framework and a Postgres database. <a href="spring-postgres"><img src="icon_devenvs.svg" alt="Use with Docker Dev Environments" height="30" align="top"/></a>
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- [`WasmEdge / MySQL / Nginx`](wasmedge-mysql-nginx) - Sample WebAssembly-based microservice
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with WasmEdge Runtime, a MySQL / MariaDB database, and an optional Nginx web server for hosting static web UI files. <a href="wasmedge-mysql-nginx"><img src="icon_devenvs.svg" alt="Compatible with Docker+wasm" height="30" align="top"/></a>
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## Single service samples
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@ -0,0 +1,26 @@
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services:
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frontend:
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image: nginx:alpine
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ports:
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- 8090:80
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volumes:
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- ./frontend:/usr/share/nginx/html
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backend:
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image: demo-microservice
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build:
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context: backend/
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platforms:
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- wasi/wasm32
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ports:
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- 8080:8080
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environment:
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DATABASE_URL: mysql://root:whalehello@db:3306/mysql
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RUST_BACKTRACE: full
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restart: unless-stopped
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runtime: io.containerd.wasmedge.v1
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db:
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image: mariadb:10.9
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environment:
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MYSQL_ROOT_PASSWORD: whalehello
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@ -0,0 +1,120 @@
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# Compose sample application
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we demonstrate a microservice written in Rust, and connected to a MySQL database (mariaDB). It supports CRUD operations on a database table via a web interface. The microservice is compiled into WebAssembly (Wasm) and runs in the WasmEdge Runtime, which is a secure and lightweight alternative to natively compiled Rust apps in Linux containers. Checkout [this article](https://blog.logrocket.com/rust-microservices-server-side-webassembly/) or [this video](https://www.youtube.com/watch?v=VSqMPFr7SEs) to learn how the Rust code in this microservice works.
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## Use with Docker Development Environments
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You will need a version of Docker Desktop or Docker CLI with Wasm support.
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* [Install Docker Desktop + Wasm (Beta)](https://docs.docker.com/desktop/wasm/)
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* [Install Docker CLI + Wasm](https://github.com/chris-crone/wasm-day-na-22/tree/main/server)
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## WasmEdge server with Nginx proxy and MySQL database
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Project structure:
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```
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.
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+-- compose.yml
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|-- backend
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+-- Dockerfile
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|-- Cargo.toml
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|-- src
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+-- main.rs
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|-- frontend
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+-- index.html
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|-- js
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+-- app.js
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|-- db
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+-- orders.json
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|-- update_order.json
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```
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The [compose.yml](compose.yml) is as follows.
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```yaml
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services:
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frontend:
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image: nginx:alpine
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ports:
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- 8090:80
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volumes:
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- ./frontend:/usr/share/nginx/html
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backend:
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image: demo-microservice
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build:
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context: backend/
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platforms:
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- wasi/wasm32
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ports:
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- 8080:8080
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environment:
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DATABASE_URL: mysql://root:whalehello@db:3306/mysql
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RUST_BACKTRACE: full
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restart: unless-stopped
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runtime: io.containerd.wasmedge.v1
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db:
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image: mariadb:10.9
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environment:
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MYSQL_ROOT_PASSWORD: whalehello
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```
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The compose file defines an application with three services `frontend`, `backend` and `db`. The `frontend` is a simple Nginx server that hosts static web pages that access the `backend` web service, in the WasmEdge container, via HTTP port 8080. When deploying the application, docker compose maps port 8090 of the `frontend` service container to port 80 of the host as specified in the file. Make sure ports 80 and 8080 on the host is not already being in use.
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## Deploy with docker compose
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```bash
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$ docker compose up -d
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...
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⠿ Network wasmedge-mysql-nginx_default Created
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⠿ Container wasmedge-mysql-nginx-db-1 Created
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⠿ Container wasmedge-mysql-nginx-frontend-1 Created
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⠿ Container wasmedge-mysql-nginx-backend-1 Created
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```
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## Expected result
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```bash
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$ docker compose ps
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NAME COMMAND SERVICE STATUS PORTS
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wasmedge-mysql-nginx-backend-1 "order_demo_service.…" backend running 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp
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wasmedge-mysql-nginx-db-1 "docker-entrypoint.s…" db running 3306/tcp
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wasmedge-mysql-nginx-frontend-1 "/docker-entrypoint.…" frontend running 0.0.0.0:8090->80/tcp, :::8090->80/tcp
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```
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After the application starts, navigate to `http://localhost:80` in your web browser to interact with the `backend` WasmEdge server and database through HTML and JavaScript.
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Alternatively, you can use the `curl` command to interact with the WasmEdge web service (i.e., the `backend` service).
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When the WasmEdge web service receives a GET request to the `/init` endpoint, it would initialize the database with the `orders` table.
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```bash
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curl http://localhost:8080/init
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```
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When the WasmEdge web service receives a POST request to the `/create_order` endpoint, it would extract the JSON data from the POST body and insert an `Order` record into the database table.
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For multiple records, use the `/create_orders` endpoint and POST a JSON array of `Order` objects.
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```bash
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curl http://localhost:8080/create_orders -X POST -d @db/orders.json
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```
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When the WasmEdge web service receives a GET request to the `/orders` endpoint, it would get all rows from the `orders` table and return the result set in a JSON array in the HTTP response.
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```bash
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curl http://localhost:8080/orders
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```
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When the WasmEdge web service receives a POST request to the `/update_order` endpoint, it would extract the JSON data from the POST body and update the `Order` record in the database table that matches the `order_id` in the input data.
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```bash
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curl http://localhost:8080/update_order -X POST -d @db/update_order.json
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```
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When the WasmEdge web service receives a GET request to the `/delete_order` endpoint, it would delete the row in the `orders` table that matches the `id` GET parameter.
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```bash
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curl http://localhost:8080/delete_order?id=2
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```
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@ -0,0 +1,13 @@
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[package]
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name = "order_demo_service"
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version = "0.1.0"
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edition = "2021"
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[dependencies]
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anyhow = "1.0"
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serde_json = "1.0"
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serde = { version = "1.0", features = ["derive"] }
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url = "2.3"
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mysql_async_wasi = "0.30"
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hyper_wasi = { version = "0.15", features = ["full"] }
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tokio_wasi = { version = "1", features = ["io-util", "fs", "net", "time", "rt", "macros"] }
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@ -0,0 +1,29 @@
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# syntax=docker/dockerfile:1
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FROM --platform=$BUILDPLATFORM rust:1.64 AS buildbase
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WORKDIR /src
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RUN <<EOT bash
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set -ex
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apt-get update
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apt-get install -y \
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git \
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clang
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rustup target add wasm32-wasi
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EOT
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# This line installs WasmEdge including the AOT compiler
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RUN curl -sSf https://raw.githubusercontent.com/WasmEdge/WasmEdge/master/utils/install.sh | bash
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FROM buildbase AS build
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COPY Cargo.toml .
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COPY src ./src
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# Build the Wasm binary
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RUN --mount=type=cache,target=/usr/local/cargo/git/db \
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--mount=type=cache,target=/usr/local/cargo/registry/cache \
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--mount=type=cache,target=/usr/local/cargo/registry/index \
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cargo build --target wasm32-wasi --release
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# This line builds the AOT Wasm binary
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RUN /root/.wasmedge/bin/wasmedgec target/wasm32-wasi/release/order_demo_service.wasm order_demo_service.wasm
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FROM scratch
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ENTRYPOINT [ "order_demo_service.wasm" ]
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COPY --link --from=build /src/order_demo_service.wasm /order_demo_service.wasm
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@ -0,0 +1,256 @@
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use hyper::service::{make_service_fn, service_fn};
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use hyper::{Body, Method, Request, Response, StatusCode, Server};
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pub use mysql_async::prelude::*;
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pub use mysql_async::*;
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use std::convert::Infallible;
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use std::net::SocketAddr;
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use std::result::Result;
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use std::collections::HashMap;
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use serde::{Deserialize, Serialize};
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fn get_url() -> String {
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if let Ok(url) = std::env::var("DATABASE_URL") {
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let opts = Opts::from_url(&url).expect("DATABASE_URL invalid");
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if opts
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.db_name()
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.expect("a database name is required")
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.is_empty()
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{
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panic!("database name is empty");
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}
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url
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} else {
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"mysql://root:pass@127.0.0.1:3306/mysql".into()
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}
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}
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#[derive(Serialize, Deserialize, Debug)]
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struct Order {
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order_id: i32,
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product_id: i32,
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quantity: i32,
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amount: f32,
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shipping: f32,
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tax: f32,
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shipping_address: String,
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}
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impl Order {
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fn new(
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order_id: i32,
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product_id: i32,
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quantity: i32,
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amount: f32,
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shipping: f32,
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tax: f32,
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shipping_address: String,
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) -> Self {
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Self {
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order_id,
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product_id,
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quantity,
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amount,
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shipping,
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tax,
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shipping_address,
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}
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}
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}
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async fn handle_request(req: Request<Body>, pool: Pool) -> Result<Response<Body>, anyhow::Error> {
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match (req.method(), req.uri().path()) {
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(&Method::GET, "/") => Ok(Response::new(Body::from(
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"The valid endpoints are /init /create_order /create_orders /update_order /orders /delete_order",
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))),
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// Simply echo the body back to the client.
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(&Method::POST, "/echo") => Ok(Response::new(req.into_body())),
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// CORS OPTIONS
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(&Method::OPTIONS, "/init") => Ok(response_build(&String::from(""))),
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(&Method::OPTIONS, "/create_order") => Ok(response_build(&String::from(""))),
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(&Method::OPTIONS, "/create_orders") => Ok(response_build(&String::from(""))),
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(&Method::OPTIONS, "/update_order") => Ok(response_build(&String::from(""))),
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(&Method::OPTIONS, "/delete_order") => Ok(response_build(&String::from(""))),
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(&Method::OPTIONS, "/orders") => Ok(response_build(&String::from(""))),
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(&Method::GET, "/init") => {
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let mut conn = pool.get_conn().await.unwrap();
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"DROP TABLE IF EXISTS orders;".ignore(&mut conn).await?;
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"CREATE TABLE orders (order_id INT, product_id INT, quantity INT, amount FLOAT, shipping FLOAT, tax FLOAT, shipping_address VARCHAR(20));".ignore(&mut conn).await?;
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drop(conn);
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Ok(response_build("{\"status\":true}"))
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}
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(&Method::POST, "/create_order") => {
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let mut conn = pool.get_conn().await.unwrap();
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let byte_stream = hyper::body::to_bytes(req).await?;
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let order: Order = serde_json::from_slice(&byte_stream).unwrap();
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"INSERT INTO orders (order_id, product_id, quantity, amount, shipping, tax, shipping_address) VALUES (:order_id, :product_id, :quantity, :amount, :shipping, :tax, :shipping_address)"
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.with(params! {
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"order_id" => order.order_id,
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"product_id" => order.product_id,
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"quantity" => order.quantity,
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"amount" => order.amount,
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"shipping" => order.shipping,
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"tax" => order.tax,
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"shipping_address" => &order.shipping_address,
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})
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.ignore(&mut conn)
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.await?;
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drop(conn);
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Ok(response_build("{\"status\":true}"))
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// Ok(Response::new(Body::from("{\"status\":true}")))
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}
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(&Method::POST, "/create_orders") => {
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let mut conn = pool.get_conn().await.unwrap();
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let byte_stream = hyper::body::to_bytes(req).await?;
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let orders: Vec<Order> = serde_json::from_slice(&byte_stream).unwrap();
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"INSERT INTO orders (order_id, product_id, quantity, amount, shipping, tax, shipping_address) VALUES (:order_id, :product_id, :quantity, :amount, :shipping, :tax, :shipping_address)"
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.with(orders.iter().map(|order| {
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params! {
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"order_id" => order.order_id,
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"product_id" => order.product_id,
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"quantity" => order.quantity,
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"amount" => order.amount,
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"shipping" => order.shipping,
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"tax" => order.tax,
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"shipping_address" => &order.shipping_address,
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}
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}))
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.batch(&mut conn)
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.await?;
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drop(conn);
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Ok(response_build("{\"status\":true}"))
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// Ok(Response::new(Body::from("{\"status\":true}")))
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}
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(&Method::POST, "/update_order") => {
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let mut conn = pool.get_conn().await.unwrap();
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let byte_stream = hyper::body::to_bytes(req).await?;
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let order: Order = serde_json::from_slice(&byte_stream).unwrap();
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"UPDATE orders SET product_id=:product_id, quantity=:quantity, amount=:amount, shipping=:shipping, tax=:tax, shipping_address=:shipping_address WHERE order_id=:order_id"
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.with(params! {
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"product_id" => order.product_id,
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"quantity" => order.quantity,
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"amount" => order.amount,
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"shipping" => order.shipping,
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"tax" => order.tax,
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"shipping_address" => &order.shipping_address,
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"order_id" => order.order_id,
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})
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.ignore(&mut conn)
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.await?;
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drop(conn);
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Ok(response_build("{\"status\":true}"))
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// Ok(Response::new(Body::from("{\"status\":true}")))
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}
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(&Method::GET, "/orders") => {
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let mut conn = pool.get_conn().await.unwrap();
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let orders = "SELECT * FROM orders"
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.with(())
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.map(&mut conn, |(order_id, product_id, quantity, amount, shipping, tax, shipping_address)| {
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Order::new(
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order_id,
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product_id,
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quantity,
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amount,
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shipping,
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tax,
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shipping_address,
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)},
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).await?;
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drop(conn);
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Ok(response_build(serde_json::to_string(&orders)?.as_str()))
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// Ok(Response::new(Body::from(serde_json::to_string(&orders)?)))
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}
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(&Method::GET, "/delete_order") => {
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let mut conn = pool.get_conn().await.unwrap();
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let params: HashMap<String, String> = req.uri().query().map(|v| {
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url::form_urlencoded::parse(v.as_bytes()).into_owned().collect()
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}).unwrap_or_else(HashMap::new);
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let order_id = params.get("id");
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"DELETE FROM orders WHERE order_id=:order_id"
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.with(params! { "order_id" => order_id, })
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.ignore(&mut conn)
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.await?;
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drop(conn);
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Ok(response_build("{\"status\":true}"))
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// Ok(Response::new(Body::from("{\"status\":true}")))
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}
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// Return the 404 Not Found for other routes.
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_ => {
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let mut not_found = Response::default();
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*not_found.status_mut() = StatusCode::NOT_FOUND;
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Ok(not_found)
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}
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}
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}
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// CORS headers
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fn response_build(body: &str) -> Response<Body> {
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Response::builder()
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.header("Access-Control-Allow-Origin", "*")
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.header("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
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.header("Access-Control-Allow-Headers", "api,Keep-Alive,User-Agent,Content-Type")
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.body(Body::from(body.to_owned()))
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.unwrap()
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}
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#[tokio::main(flavor = "current_thread")]
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async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
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let opts = Opts::from_url(&*get_url()).unwrap();
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let builder = OptsBuilder::from_opts(opts);
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// The connection pool will have a min of 5 and max of 10 connections.
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let constraints = PoolConstraints::new(5, 10).unwrap();
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let pool_opts = PoolOpts::default().with_constraints(constraints);
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let pool = Pool::new(builder.pool_opts(pool_opts));
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let addr = SocketAddr::from(([0, 0, 0, 0], 8080));
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let make_svc = make_service_fn(|_| {
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let pool = pool.clone();
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async move {
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Ok::<_, Infallible>(service_fn(move |req| {
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let pool = pool.clone();
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handle_request(req, pool)
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}))
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}
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||||
});
|
||||
let server = Server::bind(&addr).serve(make_svc);
|
||||
if let Err(e) = server.await {
|
||||
eprintln!("server error: {}", e);
|
||||
}
|
||||
Ok(())
|
||||
|
||||
/*
|
||||
let listener = TcpListener::bind(addr).await?;
|
||||
println!("Listening on http://{}", addr);
|
||||
loop {
|
||||
let (stream, _) = listener.accept().await?;
|
||||
|
||||
tokio::task::spawn(async move {
|
||||
if let Err(err) = Http::new().serve_connection(stream, service_fn(handle_request)).await {
|
||||
println!("Error serving connection: {:?}", err);
|
||||
}
|
||||
});
|
||||
}
|
||||
*/
|
||||
}
|
||||
|
|
@ -0,0 +1,26 @@
|
|||
services:
|
||||
frontend:
|
||||
image: nginx:alpine
|
||||
ports:
|
||||
- 8090:80
|
||||
volumes:
|
||||
- ./frontend:/usr/share/nginx/html
|
||||
|
||||
backend:
|
||||
image: demo-microservice
|
||||
build:
|
||||
context: backend/
|
||||
platforms:
|
||||
- wasi/wasm32
|
||||
ports:
|
||||
- 8080:8080
|
||||
environment:
|
||||
DATABASE_URL: mysql://root:whalehello@db:3306/mysql
|
||||
RUST_BACKTRACE: full
|
||||
restart: unless-stopped
|
||||
runtime: io.containerd.wasmedge.v1
|
||||
|
||||
db:
|
||||
image: mariadb:10.9
|
||||
environment:
|
||||
MYSQL_ROOT_PASSWORD: whalehello
|
||||
|
|
@ -0,0 +1,47 @@
|
|||
[
|
||||
{
|
||||
"order_id": 1,
|
||||
"product_id": 12,
|
||||
"quantity": 2,
|
||||
"amount": 56.0,
|
||||
"shipping": 15.0,
|
||||
"tax": 2.0,
|
||||
"shipping_address": "Mataderos 2312"
|
||||
},
|
||||
{
|
||||
"order_id": 2,
|
||||
"product_id": 15,
|
||||
"quantity": 3,
|
||||
"amount": 256.0,
|
||||
"shipping": 30.0,
|
||||
"tax": 16.0,
|
||||
"shipping_address": "1234 NW Bobcat"
|
||||
},
|
||||
{
|
||||
"order_id": 3,
|
||||
"product_id": 11,
|
||||
"quantity": 5,
|
||||
"amount": 536.0,
|
||||
"shipping": 50.0,
|
||||
"tax": 24.0,
|
||||
"shipping_address": "20 Havelock"
|
||||
},
|
||||
{
|
||||
"order_id": 4,
|
||||
"product_id": 8,
|
||||
"quantity": 8,
|
||||
"amount": 126.0,
|
||||
"shipping": 20.0,
|
||||
"tax": 12.0,
|
||||
"shipping_address": "224 Pandan Loop"
|
||||
},
|
||||
{
|
||||
"order_id": 5,
|
||||
"product_id": 24,
|
||||
"quantity": 1,
|
||||
"amount": 46.0,
|
||||
"shipping": 10.0,
|
||||
"tax": 2.0,
|
||||
"shipping_address": "No.10 Jalan Besar"
|
||||
}
|
||||
]
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
{
|
||||
"order_id": 3,
|
||||
"product_id": 12,
|
||||
"quantity": 2,
|
||||
"amount": 56.0,
|
||||
"shipping": 15.0,
|
||||
"tax": 2.0,
|
||||
"shipping_address": "123 Main Street"
|
||||
}
|
||||
|
|
@ -0,0 +1,102 @@
|
|||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head>
|
||||
<title>Demo App</title>
|
||||
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Zenh87qX5JnK2Jl0vWa8Ck2rdkQ2Bzep5IDxbcnCeuOxjzrPF/et3URy9Bv1WTRi" crossorigin="anonymous" />
|
||||
<style>.d-none { display: none; }</style>
|
||||
</head>
|
||||
<body class="mb-5">
|
||||
<div class="container mt-5">
|
||||
<div id="app-loading-display">
|
||||
<h1>Loading...</h1>
|
||||
</div>
|
||||
|
||||
<div id="order-display" class="d-none">
|
||||
<h1>Welcome to the Demo!</h1>
|
||||
<p>This application is served using nginx for the website, Wasm for the backend, and MariaDB for the database.</p>
|
||||
|
||||
<div id="order-empty-text" class="d-none">
|
||||
<em>There are currently no orders to display!</em>
|
||||
</div>
|
||||
|
||||
<table id="order-table" class="d-none table table-striped">
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Id</th>
|
||||
<th>Product Id</th>
|
||||
<th>Quantity</th>
|
||||
<th>Amount</th>
|
||||
<th>Shipping</th>
|
||||
<th>Tax</th>
|
||||
<th>Address</th>
|
||||
<th></th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody></tbody>
|
||||
</table>
|
||||
|
||||
<hr />
|
||||
|
||||
<div id="add-order-wrapper" class="d-none row">
|
||||
<div class="col-6">
|
||||
<div class="accordion" id="accordionExample">
|
||||
<div class="accordion-item">
|
||||
<h2 class="accordion-header" id="addOrderHeading">
|
||||
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#addOrder" aria-controls="addOrder">
|
||||
Add an order
|
||||
</button>
|
||||
</h2>
|
||||
|
||||
<div id="addOrder" class="accordion-collapse collapse p-3" aria-labelledby="addOrderHeading" data-bs-parent="#accordionExample">
|
||||
<form id="add-order-form">
|
||||
<div class="mb-3">
|
||||
<label for="order-id" class="form-label">Order Id</label>
|
||||
<input type="number" required class="form-control" id="order-id" aria-describedby="orderIdHelp">
|
||||
<div id="orderIdHelp" class="form-text">The ID of the order</div>
|
||||
</div>
|
||||
<div class="mb-3">
|
||||
<label for="product-id" class="form-label">Product Id</label>
|
||||
<input type="number" required class="form-control" id="product-id" aria-describedby="productIdHelp">
|
||||
<div id="productIdHelp" class="form-text">The ID of the product</div>
|
||||
</div>
|
||||
<div class="mb-3">
|
||||
<label for="quantity" class="form-label">Quantity</label>
|
||||
<input type="number" required class="form-control" id="quantity" aria-describedby="quantityHelp">
|
||||
<div id="quantityHelp" class="form-text">How many of the product?</div>
|
||||
</div>
|
||||
<div class="mb-3">
|
||||
<label for="amount" class="form-label">Amount</label>
|
||||
<input type="number" required class="form-control" id="amount" aria-describedby="amountHelp">
|
||||
<div id="amountHelp" class="form-text">The total amount</div>
|
||||
</div>
|
||||
<div class="mb-3">
|
||||
<label for="tax" class="form-label">Tax</label>
|
||||
<input type="number" required class="form-control" id="tax" aria-describedby="taxHelp">
|
||||
<div id="taxHelp" class="form-text">The total amount of tax</div>
|
||||
</div>
|
||||
<div class="mb-3">
|
||||
<label for="shippingAmount" class="form-label">Shipping Amount</label>
|
||||
<input type="number" required class="form-control" id="shippingAmount" aria-describedby="shippingAmountHelp">
|
||||
<div id="shippingAmountHelp" class="form-text">The total amount for shipping</div>
|
||||
</div>
|
||||
<div class="mb-3">
|
||||
<label for="shippingAddress" class="form-label">Shipping Address</label>
|
||||
<input type="text" required class="form-control" id="shippingAddress" aria-describedby="addressHelp">
|
||||
<div id="addressHelp" class="form-text">Where to send the order</div>
|
||||
</div>
|
||||
|
||||
<input type="submit" class="btn btn-success" value="Add Order" />
|
||||
</form>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
</div>
|
||||
|
||||
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-OERcA2EqjJCMA+/3y+gxIOqMEjwtxJY7qPCqsdltbNJuaOe923+mo//f6V8Qbsw3" crossorigin="anonymous"></script>
|
||||
<script type="text/javascript" src="/js/app.js"></script>
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -0,0 +1,135 @@
|
|||
(function() {
|
||||
let orders = null;
|
||||
const appLoadingEle = document.getElementById("app-loading-display");
|
||||
const orderWrapperEle = document.getElementById("order-display");
|
||||
const orderEmptyTextEle = document.getElementById("order-empty-text");
|
||||
const orderTableEle = document.getElementById("order-table");
|
||||
const orderTableBodyEle = document.querySelector("#order-table tbody");
|
||||
const addOrderEle = document.getElementById("add-order-wrapper");
|
||||
const addOrderForm = document.getElementById("add-order-form");
|
||||
|
||||
const orderIdField = document.getElementById("order-id");
|
||||
const productIdField = document.getElementById("product-id");
|
||||
const quantityField = document.getElementById("quantity");
|
||||
const amountField = document.getElementById("amount");
|
||||
const taxField = document.getElementById("tax");
|
||||
const shippingField = document.getElementById("shippingAmount");
|
||||
const shippingAddressField = document.getElementById("shippingAddress");
|
||||
|
||||
function fetchOrders() {
|
||||
fetch("http://localhost:8080/orders")
|
||||
.then(r => r.json())
|
||||
.then(r => orders = r)
|
||||
.then(renderOrders)
|
||||
.catch((e) => {
|
||||
init();
|
||||
});
|
||||
}
|
||||
|
||||
function init() {
|
||||
fetch("http://localhost:8080/init")
|
||||
.then(() => fetchOrders())
|
||||
.catch((e) => displayError(e));
|
||||
}
|
||||
|
||||
function renderOrders() {
|
||||
appLoadingEle.classList.add("d-none");
|
||||
orderWrapperEle.classList.remove("d-none");
|
||||
addOrderEle.classList.remove("d-none");
|
||||
|
||||
if (orders.length === 0) {
|
||||
orderEmptyTextEle.classList.remove("d-none");
|
||||
orderTableEle.classList.add("d-none");
|
||||
return;
|
||||
}
|
||||
|
||||
orderEmptyTextEle.classList.add("d-none");
|
||||
orderTableEle.classList.remove("d-none");
|
||||
|
||||
while (orderTableBodyEle.firstChild) {
|
||||
orderTableBodyEle.removeChild(orderTableBodyEle.firstChild);
|
||||
}
|
||||
|
||||
orders.forEach((order) => {
|
||||
const orderId = order.order_id;
|
||||
|
||||
const row = document.createElement("tr");
|
||||
|
||||
row.appendChild(createCell(order.order_id));
|
||||
row.appendChild(createCell(order.product_id));
|
||||
row.appendChild(createCell(order.quantity));
|
||||
row.appendChild(createCell(order.amount));
|
||||
row.appendChild(createCell(order.shipping));
|
||||
row.appendChild(createCell(order.tax));
|
||||
row.appendChild(createCell(order.shipping_address));
|
||||
|
||||
const actionCell = document.createElement("td");
|
||||
|
||||
const deleteButton = document.createElement("button");
|
||||
deleteButton.classList.add(...["btn","btn-sm","btn-danger"]);
|
||||
deleteButton.innerText = "Delete";
|
||||
|
||||
deleteButton.addEventListener("click", (e) => {
|
||||
e.preventDefault();
|
||||
deleteOrder(orderId);
|
||||
});
|
||||
|
||||
actionCell.appendChild(deleteButton);
|
||||
|
||||
row.appendChild(actionCell);
|
||||
|
||||
orderTableBodyEle.appendChild(row);
|
||||
});
|
||||
}
|
||||
|
||||
function createCell(contents) {
|
||||
const cell = document.createElement("td");
|
||||
cell.innerText = contents;
|
||||
return cell;
|
||||
}
|
||||
|
||||
function deleteOrder(orderId) {
|
||||
fetch(`http://localhost:8080/delete_order?id=${orderId}`)
|
||||
.then(() => fetchOrders());
|
||||
}
|
||||
|
||||
function displayError(err) {
|
||||
alert("Error:" + err);
|
||||
}
|
||||
|
||||
function onAddFormSubmit(e) {
|
||||
e.preventDefault();
|
||||
|
||||
const data = {
|
||||
order_id : parseFloat(orderIdField.value),
|
||||
product_id : parseFloat(productIdField.value),
|
||||
quantity : parseFloat(quantityField.value),
|
||||
amount : parseFloat(amountField.value),
|
||||
shipping : parseFloat(shippingField.value),
|
||||
tax : parseFloat(taxField.value),
|
||||
shipping_address : shippingAddressField.value,
|
||||
};
|
||||
|
||||
fetch("http://localhost:8080/create_order", {
|
||||
method: "POST",
|
||||
body: JSON.stringify(data),
|
||||
headers: { "Content-type": "application/json" },
|
||||
}).then(() => fetchOrders())
|
||||
.then(() => resetAddOrderForm());
|
||||
|
||||
alert("Order added");
|
||||
}
|
||||
|
||||
function resetAddOrderForm() {
|
||||
orderIdField.value = "";
|
||||
productIdField.value = "";
|
||||
quantityField.value = "";
|
||||
amountField.value = "";
|
||||
shippingField.value = "";
|
||||
taxField.value = "";
|
||||
shippingAddressField.value = "";
|
||||
}
|
||||
|
||||
fetchOrders();
|
||||
addOrderForm.addEventListener("submit", onAddFormSubmit);
|
||||
})();
|
||||
Loading…
Reference in New Issue