feature: Change state management from global variables to object passing
This restructures dbcore (now the db package) and jwtcore (now the jwt package) to use a single struct. There is now a state package, which contains a struct with the full application state. After this, instead of initializing the API routes directly in the main function, the state object gets passed, and the API routes get initialized with their accompanying code. One fix done to reduce memory usage and increase speed is that the validator object is now persistent across requests, instead of recreating it each time. This should speed things up slightly, and improve memory usage. One additional chore done is that the database models have been moved to be a seperate file from the DB initialization itself.
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23 changed files with 1901 additions and 2161 deletions
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@ -5,13 +5,12 @@ import (
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"net/http"
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"git.terah.dev/imterah/hermes/backend/api/backendruntime"
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"git.terah.dev/imterah/hermes/backend/api/dbcore"
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"git.terah.dev/imterah/hermes/backend/api/jwtcore"
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"git.terah.dev/imterah/hermes/backend/api/db"
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"git.terah.dev/imterah/hermes/backend/api/permissions"
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"git.terah.dev/imterah/hermes/backend/api/state"
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"git.terah.dev/imterah/hermes/backend/commonbackend"
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"github.com/charmbracelet/log"
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"github.com/gin-gonic/gin"
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"github.com/go-playground/validator/v10"
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)
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type ProxyStartRequest struct {
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@ -19,124 +18,119 @@ type ProxyStartRequest struct {
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ID uint `validate:"required" json:"id"`
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}
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func StartProxy(c *gin.Context) {
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var req ProxyStartRequest
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func SetupStartProxy(state *state.State) {
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state.Engine.POST("/api/v1/forward/start", func(c *gin.Context) {
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var req ProxyStartRequest
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if err := c.BindJSON(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{
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"error": fmt.Sprintf("Failed to parse body: %s", err.Error()),
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})
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if err := c.BindJSON(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{
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"error": fmt.Sprintf("Failed to parse body: %s", err.Error()),
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})
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return
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}
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return
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}
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if err := validator.New().Struct(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{
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"error": fmt.Sprintf("Failed to validate body: %s", err.Error()),
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})
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if err := state.Validator.Struct(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{
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"error": fmt.Sprintf("Failed to validate body: %s", err.Error()),
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})
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return
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}
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return
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}
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user, err := jwtcore.GetUserFromJWT(req.Token)
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if err != nil {
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if err.Error() == "token is expired" || err.Error() == "user does not exist" {
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user, err := state.JWT.GetUserFromJWT(req.Token)
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if err != nil {
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if err.Error() == "token is expired" || err.Error() == "user does not exist" {
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c.JSON(http.StatusForbidden, gin.H{
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"error": err.Error(),
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})
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return
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} else {
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log.Warnf("Failed to get user from the provided JWT token: %s", err.Error())
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Failed to parse token",
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})
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return
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}
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}
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if !permissions.UserHasPermission(user, "routes.start") {
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c.JSON(http.StatusForbidden, gin.H{
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"error": err.Error(),
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})
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return
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} else {
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log.Warnf("Failed to get user from the provided JWT token: %s", err.Error())
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Failed to parse token",
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})
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return
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}
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}
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if !permissions.UserHasPermission(user, "routes.start") {
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c.JSON(http.StatusForbidden, gin.H{
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"error": "Missing permissions",
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})
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return
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}
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var proxy *dbcore.Proxy
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proxyRequest := dbcore.DB.Where("id = ?", req.ID).Find(&proxy)
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if proxyRequest.Error != nil {
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log.Warnf("failed to find if proxy exists or not: %s", proxyRequest.Error.Error())
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Failed to find if forward rule exists",
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})
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return
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}
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proxyExists := proxyRequest.RowsAffected > 0
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if !proxyExists {
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Forward rule doesn't exist",
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})
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return
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}
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backend, ok := backendruntime.RunningBackends[proxy.BackendID]
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if !ok {
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log.Warnf("Couldn't fetch backend runtime from backend ID #%d", proxy.BackendID)
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Couldn't fetch backend runtime",
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})
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return
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}
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backendResponse, err := backend.ProcessCommand(&commonbackend.AddProxy{
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SourceIP: proxy.SourceIP,
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SourcePort: proxy.SourcePort,
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DestPort: proxy.DestinationPort,
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Protocol: proxy.Protocol,
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})
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switch responseMessage := backendResponse.(type) {
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case error:
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log.Warnf("Failed to get response for backend #%d: %s", proxy.BackendID, responseMessage.Error())
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "failed to get response from backend",
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})
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return
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case *commonbackend.ProxyStatusResponse:
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if !responseMessage.IsActive {
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "failed to start proxy",
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"error": "Missing permissions",
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})
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return
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}
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break
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default:
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log.Errorf("Got illegal response type for backend #%d: %T", proxy.BackendID, responseMessage)
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var proxy *db.Proxy
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proxyRequest := state.DB.DB.Where("id = ?", req.ID).Find(&proxy)
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Got invalid response from backend. Proxy was still successfully deleted",
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if proxyRequest.Error != nil {
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log.Warnf("failed to find if proxy exists or not: %s", proxyRequest.Error.Error())
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Failed to find if forward rule exists",
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})
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return
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}
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proxyExists := proxyRequest.RowsAffected > 0
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if !proxyExists {
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Forward rule doesn't exist",
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})
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return
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}
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backend, ok := backendruntime.RunningBackends[proxy.BackendID]
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if !ok {
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log.Warnf("Couldn't fetch backend runtime from backend ID #%d", proxy.BackendID)
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Couldn't fetch backend runtime",
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})
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return
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}
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backendResponse, err := backend.ProcessCommand(&commonbackend.AddProxy{
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SourceIP: proxy.SourceIP,
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SourcePort: proxy.SourcePort,
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DestPort: proxy.DestinationPort,
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Protocol: proxy.Protocol,
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})
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return
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}
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switch responseMessage := backendResponse.(type) {
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case error:
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log.Warnf("Failed to get response for backend #%d: %s", proxy.BackendID, responseMessage.Error())
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c.JSON(http.StatusOK, gin.H{
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"success": true,
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "failed to get response from backend",
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})
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case *commonbackend.ProxyStatusResponse:
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if !responseMessage.IsActive {
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "failed to start proxy",
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})
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} else {
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c.JSON(http.StatusOK, gin.H{
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"success": true,
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})
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}
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default:
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log.Errorf("Got illegal response type for backend #%d: %T", proxy.BackendID, responseMessage)
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c.JSON(http.StatusInternalServerError, gin.H{
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"error": "Got invalid response from backend. Proxy was likely still successfully started",
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})
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}
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})
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}
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