Five v0.9 — Harbour + Go fusion language
- Compiler: PP → Lexer → Parser → Analyzer → Gengo pipeline - Parser: 232/236 (98%) Harbour compatibility, registry-based dispatch - RTL: 351 Harbour-compatible functions - RDD: DBF/NTX/CDX engines with Rushmore bitmap optimization - Go Interop: IMPORT + pkg.Func() + obj:Method() with FastPath (15M calls/sec) - HB_FUNC API: Full Harbour C API compatible Go bridge - Concurrency: SPAWN/LAUNCH/GOROUTINE, <-, WATCH, PARALLEL FOR, ASYNC/AWAIT - Extensions: Multi-return, DEFER, Slice, f-string, Nil-safe ?:, CONST - Macro Compiler: Runtime AST parsing and evaluation - Debugger: TUI debugger with source display, breakpoints, stepping - FRB: Native + Pcode dual mode runtime binary - Tests: 13 packages ALL PASS Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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examples/go_httpserver.prg
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180
examples/go_httpserver.prg
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// Five Example: HTTP REST API Server
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//
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// PRG handles business logic (customer data, search)
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// Go handles HTTP serving, JSON, concurrency
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//
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// Usage: five run go_httpserver.prg
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// curl http://localhost:8080/api/customers
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// curl http://localhost:8080/api/customers/search?name=John
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PROCEDURE Main()
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LOCAL cPort
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cPort := "8080"
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? "=== Five REST API Server ==="
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? "Powered by Harbour data + Go net/http"
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?
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? "Starting server on port " + cPort + "..."
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? "Endpoints:"
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? " GET /api/customers - list all customers"
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? " GET /api/customers/search - search by name (?name=xxx)"
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? " POST /api/customers - add customer (JSON body)"
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? " GET /api/stats - server statistics"
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? " GET /health - health check"
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?
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? "Press Ctrl+C to stop"
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GoHttpServe(cPort)
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RETURN
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FUNCTION GetCustomers()
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LOCAL aResult
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aResult := {}
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AAdd(aResult, { "id" => 1, "name" => "Charles Kwon", "city" => "Seoul", "balance" => 15000.50 })
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AAdd(aResult, { "id" => 2, "name" => "John Smith", "city" => "New York", "balance" => 8200.00 })
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AAdd(aResult, { "id" => 3, "name" => "Maria Garcia", "city" => "Madrid", "balance" => 12300.75 })
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AAdd(aResult, { "id" => 4, "name" => "Yuki Tanaka", "city" => "Tokyo", "balance" => 9800.25 })
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AAdd(aResult, { "id" => 5, "name" => "Hans Mueller", "city" => "Berlin", "balance" => 6500.00 })
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RETURN aResult
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FUNCTION SearchCustomers(cSearch)
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LOCAL aAll, aResult, i
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aAll := GetCustomers()
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aResult := {}
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FOR i := 1 TO Len(aAll)
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IF Upper(cSearch) $ Upper(aAll[i]["name"])
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AAdd(aResult, aAll[i])
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ENDIF
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NEXT
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RETURN aResult
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#pragma BEGINDUMP
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import (
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"encoding/json"
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"five/hbrt"
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"fmt"
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"net/http"
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"strings"
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"sync/atomic"
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"time"
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)
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var requestCount int64
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var startTime time.Time
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func init() {
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hbrt.HB_FUNC("GOHTTPSERVE", goHttpServe)
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}
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func goHttpServe(ctx *hbrt.HBContext) {
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port := ctx.ParC(1)
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if port == "" {
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port = "8080"
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}
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startTime = time.Now()
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mux := http.NewServeMux()
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mux.HandleFunc("/health", handleHealth)
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mux.HandleFunc("/api/stats", handleStats)
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mux.HandleFunc("/api/customers", handleCustomers)
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mux.HandleFunc("/api/customers/search", handleSearch)
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server := &http.Server{
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Addr: ":" + port,
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Handler: withLogging(mux),
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ReadTimeout: 15 * time.Second,
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WriteTimeout: 15 * time.Second,
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}
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if err := server.ListenAndServe(); err != nil {
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ctx.RetC("Error: " + err.Error())
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}
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}
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func withLogging(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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atomic.AddInt64(&requestCount, 1)
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start := time.Now()
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next.ServeHTTP(w, r)
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fmt.Printf(" %s %s %s [%v]\n", r.Method, r.URL.Path, r.RemoteAddr, time.Since(start))
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})
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}
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func handleHealth(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(map[string]interface{}{
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"status": "healthy",
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"uptime": time.Since(startTime).String(),
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})
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}
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func handleStats(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(map[string]interface{}{
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"requests": atomic.LoadInt64(&requestCount),
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"uptime_ms": time.Since(startTime).Milliseconds(),
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"engine": "Five (Harbour + Go)",
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})
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}
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func handleCustomers(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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customers := []map[string]interface{}{
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{"id": 1, "name": "Charles Kwon", "city": "Seoul", "balance": 15000.50},
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{"id": 2, "name": "John Smith", "city": "New York", "balance": 8200.00},
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{"id": 3, "name": "Maria Garcia", "city": "Madrid", "balance": 12300.75},
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{"id": 4, "name": "Yuki Tanaka", "city": "Tokyo", "balance": 9800.25},
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{"id": 5, "name": "Hans Mueller", "city": "Berlin", "balance": 6500.00},
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}
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if r.Method == "POST" {
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var newCustomer map[string]interface{}
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if err := json.NewDecoder(r.Body).Decode(&newCustomer); err != nil {
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http.Error(w, `{"error": "invalid JSON"}`, http.StatusBadRequest)
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return
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}
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newCustomer["id"] = len(customers) + 1
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customers = append(customers, newCustomer)
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w.WriteHeader(http.StatusCreated)
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json.NewEncoder(w).Encode(newCustomer)
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return
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}
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json.NewEncoder(w).Encode(customers)
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}
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func handleSearch(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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query := strings.ToLower(r.URL.Query().Get("name"))
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if query == "" {
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http.Error(w, `{"error": "name parameter required"}`, http.StatusBadRequest)
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return
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}
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customers := []map[string]interface{}{
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{"id": 1, "name": "Charles Kwon", "city": "Seoul", "balance": 15000.50},
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{"id": 2, "name": "John Smith", "city": "New York", "balance": 8200.00},
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{"id": 3, "name": "Maria Garcia", "city": "Madrid", "balance": 12300.75},
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{"id": 4, "name": "Yuki Tanaka", "city": "Tokyo", "balance": 9800.25},
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{"id": 5, "name": "Hans Mueller", "city": "Berlin", "balance": 6500.00},
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}
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var results []map[string]interface{}
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for _, c := range customers {
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if strings.Contains(strings.ToLower(c["name"].(string)), query) {
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results = append(results, c)
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}
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}
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json.NewEncoder(w).Encode(results)
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}
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#pragma ENDDUMP
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