/
manager.go
242 lines (195 loc) · 6.65 KB
/
manager.go
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package main
import (
"encoding/json"
"fmt"
"os"
"path/filepath"
"time"
"net/http"
"github.com/gorilla/mux"
"log"
"strconv"
"github.com/dstarodubtsev/go_strftime"
"flag"
)
// --------------------------------------------------------------------------------
// Command line parameters
var port = flag.Int("port", 7777, "Listening port")
var keys_file = flag.String("keys_file", "./accounts.json", "JSON-file with accounts")
// --------------------------------------------------------------------------------
// Global vars
var default_bullets int64 = 1
var keys_hash = make(map[string]bool)
var services = []string{"search/tweets", "statuses/user_timeline", "statuses/lookup", "users/lookup", "followers/ids", "friends/ids"}
var limits = make(map[string]map[string]Limits)
// --------------------------------------------------------------------------------
// Keys storage
type Key struct {
ConsumerKey string `json:"consumer_key"`
ConsumerSecret string `json:"consumer_secret"`
AccessToken string `json:"access_token"`
AccessTokenSecret string `json:"access_token_secret"`
}
func(key *Key) Hash() string{
return fmt.Sprintf("%s::%s::%s::%s", key.ConsumerKey, key.ConsumerSecret, key.AccessToken, key.AccessTokenSecret)
}
func(key Key) String() string{
return fmt.Sprintf("consumer_key: %s, consumer_secret: %s, access_token: %s, access_token_secret: %s", key.ConsumerKey, key.ConsumerSecret, key.AccessToken, key.AccessTokenSecret)
}
type KeyList []Key
// --------------------------------------------------------------------------------
// Limits pack
type Limits struct {
Remaining int64
Reset int64
Key Key
}
// --------------------------------------------------------------------------------
// Better then if err != nil{...} :)
func check_err(e error) {
if e != nil {
log.Panic(e)
}
}
// --------------------------------------------------------------------------------
// Loading keys from file
func LoadKeys(keys_file string) KeyList {
// Get absolute path to keys_file
fp, err := filepath.Abs(keys_file)
check_err(err)
// Read file with keys
f, err := os.Open(fp)
check_err(err)
// Decode JSON
keys_pattern := KeyList{}
j := json.NewDecoder(f)
err = j.Decode(&keys_pattern)
check_err(err)
// Fill keys hash map
for _, key := range keys_pattern {
keys_hash[key.Hash()] = true
}
log.Print("Keys loaded")
return keys_pattern
}
// --------------------------------------------------------------------------------
// Serving requests: get key
func GetKey(w http.ResponseWriter, r *http.Request){
vars := mux.Vars(r)
service := vars["service"]
for k, v := range limits{
if k != service{
continue
}
for ck, l := range v{
// Have more then 0 attempts or refresh time is reached
if l.Remaining > 0 || time.Now().UTC().Unix() > l.Reset {
// Send as JSON
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
w.WriteHeader(http.StatusOK)
err := json.NewEncoder(w).Encode(l.Key)
check_err(err)
// Delete from storage
delete(limits[service], ck)
refresh_str := go_strftime.Strftime("%Y-%m-%d %H:%M:%S UTC", time.Unix(l.Reset, 0).UTC())
log.Printf("GET key \"%s\" for service %s, remaining: %d, reset: %s, bullets: %d", ck, service, l.Remaining, refresh_str, len(limits[service]))
return
}
}
}
// No one suitable key
w.WriteHeader(http.StatusNoContent)
}
// --------------------------------------------------------------------------------
// Serving requests: set key
func SetKey(w http.ResponseWriter, r *http.Request){
vars := mux.Vars(r)
service := vars["service"]
// Pass only our keys
for _, s := range services{
if s == service{
break
}
w.WriteHeader(http.StatusBadRequest)
return
}
// Read data from requested form
consumer_key := r.FormValue("consumer_key")
consumer_secret := r.FormValue("consumer_secret")
access_token := r.FormValue("access_token")
access_token_secret := r.FormValue("access_token_secret")
// Make key
key := Key{
ConsumerKey: consumer_key, ConsumerSecret: consumer_secret,
AccessToken: access_token, AccessTokenSecret: access_token_secret,
}
// Check key
if _, ok := keys_hash[key.Hash()]; !ok{
w.WriteHeader(http.StatusBadRequest)
fmt.Fprint(w, "Have no key inside keys dictionary")
return
}
// Read optional field "remaining"
remaining, err := strconv.ParseInt(r.FormValue("remaining"), 10, 64)
if err != nil{
remaining = 1
}
// Read optional field "reset"
reset, err := strconv.ParseInt(r.FormValue("reset"), 10, 64)
if err != nil{
reset = time.Now().UTC().Unix()
}
// App key to storage
limits[service][key.ConsumerKey] = Limits{Remaining: remaining, Reset: reset, Key: key}
refresh_str := go_strftime.Strftime("%Y-%m-%d %H:%M:%S UTC", time.Unix(reset, 0).UTC())
log.Printf("SET key \"%s\" for service \"%s\", remaining: %d, reset: %s, bullets: %d", key.ConsumerKey, service, remaining, refresh_str, len(limits[service]))
w.WriteHeader(http.StatusOK)
}
func main() {
flag.Usage = func() {
fmt.Println(`==========================================================================================
Twitter REST API keys provider. Visit https://apps.twitter.com for details.
Make JSON file with accounts, for example /path/to/accounts.json:
[
{
"consumer_key": "your-consumer-key",
"consumer_secret" : "your-consumer-secret",
"access_token": "your-access-token",
"access_token_secret": "your-access-secret"
},
{
... another key ...
}
]
Start application with flags "port" and "keys_file", for example:
./go_keys_manager --port 7777 --keys_file /path/to/accounts.json
Get key example:
GET http://localhost:7777/get?service=search/tweets
Set key example:
POST http://localhost:7777/set?service=search/tweets
Form fields:
- consumer_key string (requred)
- consumer_secret string (requred)
- access_token string (requred)
- access_token_secret string (requred)
- remaining int (current rate limit, optional but useful for next usage)
- reset int (next rate limit reset UNIX time, optional but useful for next usage)
`)
// flag.PrintDefaults()
}
flag.Parse()
keys := LoadKeys(*keys_file)
// Fill service/keys pairs
for _, service := range services{
limits[service] = make(map[string]Limits)
for _, k := range keys {
limits[service][k.ConsumerKey] = Limits{default_bullets, time.Now().UTC().Unix(), k}
}
}
// Start listening
router := mux.NewRouter().StrictSlash(true)
router.Methods("GET").Path("/get").Name("GetKey").Queries("service", "{service:[a-z/]+}").HandlerFunc(GetKey)
router.Methods("POST").Path("/set").Name("SetKey").Queries("service", "{service:[a-z/]+}").HandlerFunc(SetKey)
log.Printf("Start listening port %d\n", *port)
log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *port), router))
}