/
twocents.go
76 lines (65 loc) · 2.6 KB
/
twocents.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
package main
import (
"flag"
"fmt"
"github.com/gorilla/mux"
"github.com/jamesboehmer/twocents/handlers"
"log"
"net/http"
"strings"
"sync/atomic"
)
var defaultDataDirectory = "./data"
var defaultServiceListenPort = 8080
var defaultAdminListenPort = 8081
var reloadLock uint32 = 0
func main() {
dataDirectory := flag.String("d", defaultDataDirectory, "Directory where dictionary files are located")
serviceListenPort := flag.Int("p", defaultServiceListenPort, "Service Listen Port")
adminListenPort := flag.Int("a", defaultAdminListenPort, "Admin Listen Port")
allowedOrigin := flag.String("c", handlers.AllowedOrigin, "CORS Allowed Origin")
useQuicksort := flag.Bool("q", false, "Use Quicksort (default is InsertionSort")
flag.Parse()
handlers.UseQuicksort = *useQuicksort
log.Printf("Using data directory %s", *dataDirectory)
handlers.DataDirectory = *dataDirectory
handlers.LoadDictionaries()
r := mux.NewRouter()
r.HandleFunc("/twocents", handlers.MetaVersionsHandler).Methods("GET")
r.HandleFunc("/twocents/{version:v1}", handlers.MetaDictionariesHandler).Methods("GET")
r.HandleFunc("/twocents/{version:v1}/{dictionary}/{query}", handlers.TwoCentsHandlerV1).Methods("GET")
r.HandleFunc("/twocents/{version:v1}/{dictionary}/{query}/{limit:[0-9]+}", handlers.TwoCentsHandlerV1).Methods("GET")
r.HandleFunc("/twocents/{version:v1}/{dictionary}/{query}/{limit:[0-9]+}/{filter}", handlers.TwoCentsHandlerV1).Methods("GET")
http.Handle("/", r)
log.Printf("Service listening on port %d", *serviceListenPort)
go func() {
log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *serviceListenPort), nil))
}()
log.Printf("Admin listening on port %d", *adminListenPort)
if *allowedOrigin != "" {
log.Printf("Setting CORS Origin to %s", *allowedOrigin)
handlers.AllowedOrigin = *allowedOrigin
}
//TODO: Find a better way to pass a different router to the admin server
http.ListenAndServe(fmt.Sprintf(":%d", *adminListenPort), &adminHandler{})
}
type adminHandler struct {
}
func (m *adminHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if !strings.HasPrefix(r.RequestURI, "/twocents/admin/reload") {
http.NotFound(w, r)
return
}
// Ensure that multiple reloads never occur simultaneously, and that multiple requests don't queue up.
// The sync library doesn't seem to have a trylock mechanism, so use atomic CAS
locked := atomic.CompareAndSwapUint32(&reloadLock, 0, 1)
if locked {
w.Write([]byte("Dicionary reload initiated\n"))
go func() {
defer atomic.StoreUint32(&reloadLock, 0)
handlers.LoadDictionaries()
}()
} else {
w.Write([]byte("Dictionary reload already in progress\n"))
}
}