Publish ITWorx Pulse source

2026-09-03 02:09:19 +02:00
commit bd774932d5
614 changed files with 77116 additions and 0 deletions
@@ -0,0 +1,252 @@
+package serviceapi
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/itworx/pulse/internal/auth"
+	"github.com/itworx/pulse/internal/probe"
+	"github.com/itworx/pulse/internal/problem"
+	"github.com/itworx/pulse/internal/reverseproxy"
+	"github.com/itworx/pulse/internal/service"
+)
+
+type Handler struct {
+	Provider     service.Provider
+	Dependencies interface {
+		List(context.Context, string, int) ([]service.Dependency, error)
+	}
+	MaxPageSize  int
+	MaxHistory   int
+	ReverseProxy reverseproxy.Provider
+}
+
+func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet || (r.URL.Path != "/api/v1/services" && !strings.HasPrefix(r.URL.Path, "/api/v1/services/") && r.URL.Path != "/api/v1/topology") {
+		http.NotFound(w, r)
+		return
+	}
+	if _, ok := auth.PrincipalFromContext(r.Context()); !ok {
+		problem.Write(w, r, http.StatusUnauthorized, "UNAUTHORIZED", "Authentication required", "Authentication is required to read services.", nil)
+		return
+	}
+	if err := r.Context().Err(); err != nil {
+		return
+	}
+	if r.URL.Path == "/api/v1/topology" {
+		h.serveTopology(w, r)
+		return
+	}
+	if strings.HasSuffix(r.URL.Path, "/dependencies") {
+		h.serveDependencies(w, r)
+		return
+	}
+	snapshot, err := h.snapshot(r)
+	if err != nil {
+		if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
+			return
+		}
+		problem.Write(w, r, http.StatusServiceUnavailable, "SERVICES_UNAVAILABLE", "Servicegegevens niet beschikbaar", "De servicegegevens konden niet worden gelezen.", nil)
+		return
+	}
+	if r.URL.Path == "/api/v1/services" {
+		limit, parseErr := h.limit(r.URL.Query().Get("limit"), h.pageLimit())
+		if parseErr != nil {
+			problem.Write(w, r, http.StatusBadRequest, "SERVICE_QUERY_INVALID", "Invalid service query", "De servicelimiet is ongeldig.", nil)
+			return
+		}
+		response := boundedSnapshot(snapshot, limit, h.historyLimit())
+		writeJSON(w, response)
+		return
+	}
+	path := strings.TrimPrefix(r.URL.Path, "/api/v1/services/")
+	historyRequest := strings.HasSuffix(path, "/history")
+	if strings.Contains(path, "/") && !historyRequest {
+		http.NotFound(w, r)
+		return
+	}
+	id := strings.TrimSuffix(path, "/history")
+	id = strings.TrimSuffix(id, "/")
+	if id == "" {
+		http.NotFound(w, r)
+		return
+	}
+	for _, item := range snapshot.Services {
+		if item.ID != id {
+			continue
+		}
+		item = boundedStatus(item, h.historyLimit())
+		if historyRequest {
+			limit, parseErr := h.limit(r.URL.Query().Get("limit"), h.historyLimit())
+			if parseErr != nil {
+				problem.Write(w, r, http.StatusBadRequest, "SERVICE_HISTORY_QUERY_INVALID", "Invalid service history query", "De historielimiet is ongeldig.", nil)
+				return
+			}
+			if len(item.History) > limit {
+				item.History = item.History[:limit]
+			}
+			writeJSON(w, struct {
+				ServiceID string         `json:"serviceId"`
+				History   []probe.Result `json:"history"`
+			}{ServiceID: item.ID, History: item.History})
+			return
+		}
+		writeJSON(w, struct {
+			Service service.ServiceStatus `json:"service"`
+		}{Service: item})
+		return
+	}
+	http.NotFound(w, r)
+}
+
+func (h Handler) serveTopology(w http.ResponseWriter, r *http.Request) {
+	if h.Dependencies == nil {
+		problem.Write(w, r, http.StatusServiceUnavailable, "TOPOLOGY_UNAVAILABLE", "Topology not available", "De topologygegevens zijn niet beschikbaar.", nil)
+		return
+	}
+	limit, err := h.limit(r.URL.Query().Get("limit"), 100)
+	if err != nil {
+		problem.Write(w, r, http.StatusBadRequest, "TOPOLOGY_QUERY_INVALID", "Invalid topology query", "De topologylimiet is ongeldig.", nil)
+		return
+	}
+	snapshot, err := h.snapshot(r)
+	if err != nil {
+		if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
+			return
+		}
+		problem.Write(w, r, http.StatusServiceUnavailable, "TOPOLOGY_UNAVAILABLE", "Topology not available", "De topologygegevens konden niet worden gelezen.", nil)
+		return
+	}
+	dependencies, err := h.Dependencies.List(r.Context(), "", minTopologyEdges(limit))
+	if err != nil {
+		if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
+			return
+		}
+		problem.Write(w, r, http.StatusServiceUnavailable, "TOPOLOGY_UNAVAILABLE", "Topology not available", "De afhankelijkheden konden niet worden gelezen.", nil)
+		return
+	}
+	var routes []reverseproxy.Route
+	if h.ReverseProxy != nil {
+		proxySnapshot, proxyErr := h.ReverseProxy.Snapshot(r.Context())
+		if proxyErr != nil {
+			if errors.Is(proxyErr, context.Canceled) || errors.Is(proxyErr, context.DeadlineExceeded) {
+				return
+			}
+		} else if proxySnapshot.Source.State == reverseproxy.StateEnabled {
+			routes = proxySnapshot.Routes
+		}
+	}
+	sourceTruncated := len(snapshot.Services) > limit
+	topology, err := service.BuildTopologyWithRoutes(boundedSnapshot(snapshot, limit, h.historyLimit()), dependencies, routes, limit, minTopologyEdges(limit))
+	if err != nil {
+		problem.Write(w, r, http.StatusServiceUnavailable, "TOPOLOGY_UNAVAILABLE", "Topology not available", "De topology kon niet veilig worden samengesteld.", nil)
+		return
+	}
+	topology.Truncated = topology.Truncated || sourceTruncated
+	writeJSON(w, topology)
+}
+
+func minTopologyEdges(limit int) int {
+	if limit > 250 {
+		return 500
+	}
+	return limit * 2
+}
+func (h Handler) serveDependencies(w http.ResponseWriter, r *http.Request) {
+	if h.Dependencies == nil {
+		problem.Write(w, r, http.StatusServiceUnavailable, "DEPENDENCIES_UNAVAILABLE", "Dependencies not available", "Afhankelijkheden zijn niet beschikbaar.", nil)
+		return
+	}
+	id := strings.TrimSuffix(strings.TrimPrefix(r.URL.Path, "/api/v1/services/"), "/dependencies")
+	if id == "" || strings.Contains(id, "/") {
+		http.NotFound(w, r)
+		return
+	}
+	limit, err := h.limit(r.URL.Query().Get("limit"), 100)
+	if err != nil {
+		problem.Write(w, r, http.StatusBadRequest, "DEPENDENCY_QUERY_INVALID", "Invalid dependency query", "De afhankelijkheidslimiet is ongeldig.", nil)
+		return
+	}
+	items, err := h.Dependencies.List(r.Context(), id, limit)
+	if err != nil {
+		if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
+			return
+		}
+		problem.Write(w, r, http.StatusServiceUnavailable, "DEPENDENCIES_UNAVAILABLE", "Dependencies not available", "Afhankelijkheden konden niet worden gelezen.", nil)
+		return
+	}
+	service.SortDependencies(items)
+	writeJSON(w, struct {
+		ServiceID    string               `json:"serviceId"`
+		Dependencies []service.Dependency `json:"dependencies"`
+	}{ServiceID: id, Dependencies: items})
+}
+func (h Handler) snapshot(r *http.Request) (service.Snapshot, error) {
+	if h.Provider == nil {
+		return service.UnknownSnapshot(time.Now().UTC(), "source_unavailable"), nil
+	}
+	return h.Provider.Snapshot(r.Context())
+}
+
+func (h Handler) pageLimit() int {
+	if h.MaxPageSize == 0 {
+		return 100
+	}
+	return h.MaxPageSize
+}
+
+func (h Handler) historyLimit() int {
+	if h.MaxHistory == 0 {
+		return 100
+	}
+	return h.MaxHistory
+}
+
+func (h Handler) limit(raw string, fallback int) (int, error) {
+	if raw == "" {
+		return fallback, nil
+	}
+	value, err := strconv.Atoi(raw)
+	if err != nil || value < 1 || value > fallback {
+		return 0, errors.New("limit outside bounds")
+	}
+	return value, nil
+}
+
+func boundedSnapshot(snapshot service.Snapshot, maxServices, maxHistory int) service.Snapshot {
+	snapshot.Services = append([]service.ServiceStatus(nil), snapshot.Services...)
+	sort.Slice(snapshot.Services, func(i, j int) bool { return snapshot.Services[i].ID < snapshot.Services[j].ID })
+	if len(snapshot.Services) > maxServices {
+		snapshot.Services = snapshot.Services[:maxServices]
+	}
+	for index := range snapshot.Services {
+		snapshot.Services[index] = boundedStatus(snapshot.Services[index], maxHistory)
+	}
+	if len(snapshot.Events) > 100 {
+		snapshot.Events = snapshot.Events[:100]
+	}
+	return snapshot
+}
+
+func boundedStatus(status service.ServiceStatus, maxHistory int) service.ServiceStatus {
+	status.History = append([]probe.Result(nil), status.History...)
+	if len(status.History) > maxHistory {
+		status.History = status.History[:maxHistory]
+	}
+	if len(status.Probes) > 100 {
+		status.Probes = status.Probes[:100]
+	}
+	return status
+}
+
+func writeJSON(w http.ResponseWriter, value any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Cache-Control", "private, max-age=5")
+	_ = json.NewEncoder(w).Encode(value)
+}