Initial commit

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: ci
+
+on:
+  push:
+
+jobs:
+  buildx:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+            username: ${{ secrets.DOCKERHUB_USERNAME }}
+            password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+            push: true
+            tags: bryanhonf/iot-api-server:latest

Dockerfile

@@ -0,0 +1,22 @@
+FROM golang:bookworm AS builder
+
+ENV CGO_ENABLED=1
+RUN apt update -y
+RUN apt upgrade -y
+RUN apt install -y gcc build-essential
+WORKDIR $GOPATH/src/mypackage/myapp/
+COPY . .
+RUN go get -d -v
+RUN go mod download
+RUN go mod verify
+RUN go build -o /dist/bin/server
+
+
+FROM golang:bookworm AS runner
+
+RUN apt update -y
+RUN apt upgrade -y
+COPY --from=builder /dist/bin/server /usr/local/bin/server
+EXPOSE 8080
+WORKDIR /var/lib/iot-server
+ENTRYPOINT ["/usr/local/bin/server"]

compose.yaml

@@ -0,0 +1,19 @@
+services:
+  api-server:
+    build: .
+    ports:
+      - "8080:8080"
+    volumes:
+      - iot-db:/var/lib/iot-server
+  grafana:
+    image: grafana/grafana-enterprise
+    container_name: grafana
+    restart: unless-stopped
+    ports:
+     - '3000:3000'
+    volumes:
+      - grafana-storage:/var/lib/grafana
+      - iot-db:/var/lib/iot-server
+volumes:
+  grafana-storage: {}
+  iot-db: {}

go.mod

@@ -0,0 +1,34 @@
+module iot-api-server
+
+go 1.21.5
+
+require github.com/gin-gonic/gin v1.9.1
+
+require (
+	github.com/bytedance/sonic v1.9.1 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.14.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+	github.com/leodido/go-urn v1.2.4 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/mattn/go-sqlite3 v1.14.19 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.11 // indirect
+	golang.org/x/arch v0.3.0 // indirect
+	golang.org/x/crypto v0.9.0 // indirect
+	golang.org/x/net v0.10.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,82 @@
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main.go

@@ -0,0 +1,147 @@
+package main
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/gin-gonic/gin"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type temperature struct {
+	Id    int     `json:"id"`
+	Value float64 `json:"value"`
+	Scale string  `json:"scale"`
+}
+
+// Simple middleware to check for API key based on if the sqlite3 database exists or not
+// Not secure, not well thought out, but works well enough for my application
+func tokenAuthMIddleWare() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// Get token from header
+		token := c.GetHeader("X-Api-Key")
+
+		// If no token provided, abort with 401 Unauthorized
+		if token == "" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "API key required"})
+			return
+		}
+
+		// Check if token is valid
+		dbPath := fmt.Sprintf("./%s.db", token)
+		if _, err := os.Stat(dbPath); errors.Is(err, os.ErrNotExist) {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "API key invalid"})
+			return
+		}
+
+		// If all of the above checks pass, continue
+		c.Next()
+	}
+}
+
+func getTemperature(c *gin.Context) {
+	token := c.GetHeader("X-Api-Key")
+	dbPath := fmt.Sprintf("./%s.db", token)
+
+	// Open the database
+	db, err := sql.Open("sqlite3", dbPath)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+	defer db.Close()
+
+	// Query all rows in the temperatures table
+	rows, err := db.Query("SELECT * FROM temperatures;")
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+	defer rows.Close()
+
+	// Parse rows into a slice of Temperature structs
+	var temps []temperature
+	for rows.Next() {
+		var temp temperature
+		err = rows.Scan(&temp.Id, &temp.Value, &temp.Scale)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+	}
+	if err = rows.Err(); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	c.JSON(http.StatusOK, temps)
+}
+
+func putTemperature(c *gin.Context) {
+	token := c.GetHeader("X-Api-Key")
+	dbPath := fmt.Sprintf("./%s.db", token)
+
+	// Open the database
+	db, err := sql.Open("sqlite3", dbPath)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+	defer db.Close()
+
+	// Insert the new temperature into the database
+	tx, err := db.Begin()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	// Bind the JSON body to a temperature struct
+	var newTemperature temperature
+	if err := c.BindJSON(&newTemperature); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	// Insert the new temperature into the database
+	_, err = db.Exec("INSERT INTO temperatures(id, value, scale) VALUES(?, ?, ?);", newTemperature.Id, newTemperature.Value, newTemperature.Scale)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	// Commit the transaction
+	err = tx.Commit()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	// Return the newly inserted temperature
+	c.JSON(http.StatusCreated, newTemperature)
+}
+
+func main() {
+	router := gin.Default()
+
+	v1 := router.Group("/api/v1")
+	{
+		v1.Use(tokenAuthMIddleWare())
+		v1.GET("/temperature", getTemperature)
+		v1.PUT("/temperature", putTemperature)
+	}
+
+	router.Run(":8080")
+}

scripts/mk-new-db.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+sqlite3 "${1}.db" <<EOF
+    CREATE TABLE IF NOT EXISTS temperatures (
+        id INTEGER NOT NULL PRIMARY KEY,
+        value REAL, 
+        scale TEXT
+    );
+EOF