From 22cbf10cc8f916858f681d745784c17512fc9590 Mon Sep 17 00:00:00 2001 From: Bram Verhulst Date: Tue, 28 Jul 2026 09:58:33 +0200 Subject: [PATCH] init --- .gitignore | 48 +++++++++ Dockerfile | 38 +++++++ cmd/server/main.go | 41 +++++++ go.mod | 54 ++++++++++ go.sum | 126 ++++++++++++++++++++++ internal/apk_util/apk.go | 53 +++++++++ internal/auth/auth.go | 27 +++++ internal/db/db.go | 26 +++++ internal/models/release.go | 16 +++ internal/routes/releases.go | 209 ++++++++++++++++++++++++++++++++++++ internal/updater.go | 1 + 11 files changed, 639 insertions(+) create mode 100644 .gitignore create mode 100644 Dockerfile create mode 100644 cmd/server/main.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 internal/apk_util/apk.go create mode 100644 internal/auth/auth.go create mode 100644 internal/db/db.go create mode 100644 internal/models/release.go create mode 100644 internal/routes/releases.go create mode 100644 internal/updater.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..00af6fb --- /dev/null +++ b/.gitignore @@ -0,0 +1,48 @@ +### Go +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool +*.out + +# Go workspace file +go.work.sum + +# env file +.env + +### Windows +# Windows thumbnail cache files +Thumbs.db + +# Folder config file +[Dd]esktop.ini + +# Recycle Bin used on file shares +$RECYCLE.BIN/ + +# Windows shortcuts +*.lnk + +### JetBrains +# JetBrains IDE directory +.idea/ + +# CMake build directories +cmake-build-*/ + +# File-based project format +*.iws +*.iml + +# IntelliJ build output +out/ +uploads +updater.db diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..aca717b --- /dev/null +++ b/Dockerfile @@ -0,0 +1,38 @@ +FROM golang:1.26-alpine AS builder + +ARG GIT_COMMIT=dev + +WORKDIR /app + +RUN apk add --no-cache git gcc musl-dev bash + +COPY go.mod go.sum ./ +RUN go mod download + +COPY . . + +ENV CGO_ENABLED=1 +ENV GIN_MODE=release + +RUN go build -o app ./cmd/server + +FROM alpine:latest + +WORKDIR /app + +RUN apk add --no-cache ca-certificates tzdata + +COPY --from=builder /app/app . + +RUN mkdir -p /app/uploads +RUN mkdir -p /app/tmp + +RUN adduser -D appuser +RUN chown -R appuser:appuser /app +USER appuser + +ENV GIN_MODE=release + +EXPOSE 8000 + +CMD ["./app"] \ No newline at end of file diff --git a/cmd/server/main.go b/cmd/server/main.go new file mode 100644 index 0000000..84e42ad --- /dev/null +++ b/cmd/server/main.go @@ -0,0 +1,41 @@ +package main + +import ( + "kooltab-updateserver/internal/db" + "kooltab-updateserver/internal/routes" + "os" + + "github.com/gin-gonic/gin" + "github.com/joho/godotenv" +) + +func main() { + + err := godotenv.Load() + if err != nil { + panic("Error loading .env file") + } + + db.Connect() + + os.MkdirAll("uploads", 0755) + + r := gin.Default() + + r.Static("/downloads", "./uploads") + + r.GET("/", func(c *gin.Context) { + c.JSON(200, gin.H{ + "status": "ok", + }) + }) + + r.Use(func(c *gin.Context) { + c.Header("Server", "KoolTab Updater") + c.Next() + }) + + routes.Register(r) + + r.Run(":3000") +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..d00f1c0 --- /dev/null +++ b/go.mod @@ -0,0 +1,54 @@ +module kooltab-updateserver + +go 1.26 + +require ( + github.com/Masterminds/semver/v3 v3.5.0 + github.com/gin-gonic/gin v1.12.0 + github.com/glebarez/sqlite v1.11.0 + gorm.io/gorm v1.31.2 +) + +require ( + github.com/bytedance/gopkg v0.1.3 // indirect + github.com/bytedance/sonic v1.15.0 // indirect + github.com/bytedance/sonic/loader v0.5.0 // indirect + github.com/cloudwego/base64x v0.1.6 // indirect + github.com/dustin/go-humanize v1.0.1 // indirect + github.com/gabriel-vasile/mimetype v1.4.12 // indirect + github.com/gin-contrib/sse v1.1.0 // indirect + github.com/glebarez/go-sqlite v1.21.2 // 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 v10.30.1 // indirect + github.com/goccy/go-json v0.10.5 // indirect + github.com/goccy/go-yaml v1.19.2 // indirect + github.com/google/uuid v1.3.0 // indirect + github.com/jinzhu/inflection v1.0.0 // indirect + github.com/jinzhu/now v1.1.5 // indirect + github.com/joho/godotenv v1.5.1 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/klauspost/cpuid/v2 v2.3.0 // indirect + github.com/leodido/go-urn v1.4.0 // indirect + github.com/mattn/go-isatty v0.0.20 // 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 v2.2.4 // indirect + github.com/quic-go/qpack v0.6.0 // indirect + github.com/quic-go/quic-go v0.59.0 // indirect + github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect + github.com/shogo82148/androidbinary v1.0.5 // indirect + github.com/twitchyliquid64/golang-asm v0.15.1 // indirect + github.com/ugorji/go/codec v1.3.1 // indirect + go.mongodb.org/mongo-driver/v2 v2.5.0 // indirect + golang.org/x/arch v0.22.0 // indirect + golang.org/x/crypto v0.48.0 // indirect + golang.org/x/net v0.51.0 // indirect + golang.org/x/sys v0.41.0 // indirect + golang.org/x/text v0.34.0 // indirect + google.golang.org/protobuf v1.36.10 // indirect + modernc.org/libc v1.22.5 // indirect + modernc.org/mathutil v1.5.0 // indirect + modernc.org/memory v1.5.0 // indirect + modernc.org/sqlite v1.23.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..a67d592 --- /dev/null +++ b/go.sum @@ -0,0 +1,126 @@ +github.com/Masterminds/semver/v3 v3.5.0 h1:kQceYJfbupGfZOKZQg0kou0DgAKhzDg2NZPAwZ/2OOE= +github.com/Masterminds/semver/v3 v3.5.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM= +github.com/bytedance/gopkg v0.1.3 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h1:PkUhL0Mugw21sHPeskwZW4D6VscE/GQJOnIpCnW6pSU= +modernc.org/sqlite v1.23.1 h1:nrSBg4aRQQwq59JpvGEQ15tNxoO5pX/kUjcRNwSAGQM= +modernc.org/sqlite v1.23.1/go.mod h1:OrDj17Mggn6MhE+iPbBNf7RGKODDE9NFT0f3EwDzJqk= diff --git a/internal/apk_util/apk.go b/internal/apk_util/apk.go new file mode 100644 index 0000000..8451bad --- /dev/null +++ b/internal/apk_util/apk.go @@ -0,0 +1,53 @@ +package apk_util + +import ( + "github.com/shogo82148/androidbinary/apk" +) + +// Info holds basic APK version information. +type Info struct { + Version string + VersionCode int32 +} + +// Version returns the versionName from an APK's manifest. +func Version(path string) (string, error) { + a, err := apk.OpenFile(path) + if err != nil { + return "", err + } + defer a.Close() + + v, err := a.Manifest().VersionName.String() + if err != nil { + return "", err + } + + return v, nil +} + +// Read returns version name and version code from an APK's manifest. +func Read(path string) (*Info, error) { + a, err := apk.OpenFile(path) + if err != nil { + return nil, err + } + defer a.Close() + + manifest := a.Manifest() + + version, err := manifest.VersionName.String() + if err != nil { + return nil, err + } + + code, err := manifest.VersionCode.Int32() + if err != nil { + return nil, err + } + + return &Info{ + Version: version, + VersionCode: code, + }, nil +} diff --git a/internal/auth/auth.go b/internal/auth/auth.go new file mode 100644 index 0000000..02bae4b --- /dev/null +++ b/internal/auth/auth.go @@ -0,0 +1,27 @@ +package auth + +import ( + "net/http" + "os" +) + +import ( + "github.com/gin-gonic/gin" +) + +func AdminAuth() gin.HandlerFunc { + + token := os.Getenv("ADMIN_TOKEN") + + return func(c *gin.Context) { + + if c.GetHeader("X-Admin-Token") != token { + c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{ + "error": "Unauthorized", + }) + return + } + + c.Next() + } +} diff --git a/internal/db/db.go b/internal/db/db.go new file mode 100644 index 0000000..f1af356 --- /dev/null +++ b/internal/db/db.go @@ -0,0 +1,26 @@ +package db + +import ( + "kooltab-updateserver/internal/models" + "log" + + "github.com/glebarez/sqlite" + "gorm.io/gorm" +) + +var DB *gorm.DB + +func Connect() { + + db, err := gorm.Open(sqlite.Open("updater.db"), &gorm.Config{}) + + if err != nil { + log.Fatal(err) + } + + DB = db + + if err := DB.AutoMigrate(&models.Release{}); err != nil { + log.Fatal(err) + } +} diff --git a/internal/models/release.go b/internal/models/release.go new file mode 100644 index 0000000..30988ac --- /dev/null +++ b/internal/models/release.go @@ -0,0 +1,16 @@ +package models + +import "time" + +type Release struct { + ID uint `gorm:"primaryKey"` + Version string `gorm:"unique;not null"` // versionName + VersionCode int64 `gorm:"not null"` // Android versionCode + + APKFile string `gorm:"not null"` + Notes string + Mandatory bool + SHA256 string + + CreatedAt time.Time +} diff --git a/internal/routes/releases.go b/internal/routes/releases.go new file mode 100644 index 0000000..3b24208 --- /dev/null +++ b/internal/routes/releases.go @@ -0,0 +1,209 @@ +package routes + +import ( + "crypto/sha256" + "encoding/hex" + "io" + "kooltab-updateserver/internal/apk_util" + "kooltab-updateserver/internal/auth" + "kooltab-updateserver/internal/db" + "kooltab-updateserver/internal/models" + "net/http" + "os" + "path/filepath" + + "github.com/Masterminds/semver/v3" + "github.com/gin-gonic/gin" +) + +func Register(r *gin.Engine) { + + api := r.Group("/api") + { + api.GET("/update", CheckUpdate) + api.GET("/releases", ListReleases) + } + + admin := r.Group("/admin") + admin.Use(auth.AdminAuth()) + { + admin.POST("/releases", UploadRelease) + admin.DELETE("/releases/:id", DeleteRelease) + } +} + +func CheckUpdate(c *gin.Context) { + + current := c.Query("version") + + var latest models.Release + + if err := db.DB. + Order("created_at desc"). + First(&latest).Error; err != nil { + + c.JSON(http.StatusOK, gin.H{ + "update": false, + }) + return + } + + cv, err1 := semver.NewVersion(current) + lv, err2 := semver.NewVersion(latest.Version) + + if err1 != nil || err2 != nil { + + c.JSON(http.StatusOK, gin.H{ + "update": latest.Version != current, + }) + + return + } + + if !lv.GreaterThan(cv) { + + c.JSON(http.StatusOK, gin.H{ + "update": false, + }) + + return + } + + c.JSON(http.StatusOK, gin.H{ + "update": true, + "version": latest.Version, + "notes": latest.Notes, + "mandatory": latest.Mandatory, + "sha256": latest.SHA256, + "download": "/downloads/" + latest.APKFile, + }) +} + +func ListReleases(c *gin.Context) { + + var releases []models.Release + + db.DB. + Order("created_at desc"). + Find(&releases) + + c.JSON(http.StatusOK, releases) +} + +func UploadRelease(c *gin.Context) { + + notes := c.PostForm("notes") + mandatory := c.PostForm("mandatory") == "true" + + file, err := c.FormFile("apk") + if err != nil { + c.JSON(http.StatusBadRequest, gin.H{ + "error": "APK required", + }) + return + } + + // Save temporarily first because we need to inspect the APK + tempPath := filepath.Join("uploads", "temp-"+file.Filename) + + if err := c.SaveUploadedFile(file, tempPath); err != nil { + c.JSON(http.StatusInternalServerError, gin.H{ + "error": err.Error(), + }) + return + } + + defer os.Remove(tempPath) + + // Extract version information from APK + info, err := apk_util.Read(tempPath) + if err != nil { + c.JSON(http.StatusBadRequest, gin.H{ + "error": "invalid APK: " + err.Error(), + }) + return + } + + filename := "app-" + info.Version + ".apk" + path := filepath.Join("uploads", filename) + + // Prevent overwriting an existing release + if _, err := os.Stat(path); err == nil { + c.JSON(http.StatusConflict, gin.H{ + "error": "version already exists", + }) + return + } + + // Move temp APK to final filename + if err := os.Rename(tempPath, path); err != nil { + c.JSON(http.StatusInternalServerError, gin.H{ + "error": err.Error(), + }) + return + } + + // Calculate SHA256 + hash := sha256.New() + + f, err := os.Open(path) + if err != nil { + c.JSON(http.StatusInternalServerError, gin.H{ + "error": err.Error(), + }) + return + } + + defer f.Close() + + if _, err := io.Copy(hash, f); err != nil { + c.JSON(http.StatusInternalServerError, gin.H{ + "error": err.Error(), + }) + return + } + + release := models.Release{ + Version: info.Version, + VersionCode: int64(info.VersionCode), + APKFile: filename, + Notes: notes, + Mandatory: mandatory, + SHA256: hex.EncodeToString(hash.Sum(nil)), + } + + if err := db.DB.Create(&release).Error; err != nil { + + // cleanup uploaded file if DB fails + os.Remove(path) + + c.JSON(http.StatusInternalServerError, gin.H{ + "error": err.Error(), + }) + return + } + + c.JSON(http.StatusOK, release) +} + +func DeleteRelease(c *gin.Context) { + + var release models.Release + + if err := db.DB.First(&release, c.Param("id")).Error; err != nil { + + c.JSON(http.StatusNotFound, gin.H{ + "error": "Not found", + }) + + return + } + + os.Remove(filepath.Join("uploads", release.APKFile)) + + db.DB.Delete(&release) + + c.JSON(http.StatusOK, gin.H{ + "success": true, + }) +} diff --git a/internal/updater.go b/internal/updater.go new file mode 100644 index 0000000..5bf0569 --- /dev/null +++ b/internal/updater.go @@ -0,0 +1 @@ +package internal