Version 0.2.6

proxy.go

@@ -26,6 +26,39 @@ type savedStorage struct {
 	description string
 }
 
+type GlobalStorageWatcher interface {
+	// Callback for when a new request is saved
+	NewRequestSaved(storageId int, ms MessageStorage, req *ProxyRequest)
+	// Callback for when a request is updated
+	RequestUpdated(storageId int, ms MessageStorage, req *ProxyRequest)
+	// Callback for when a request is deleted
+	RequestDeleted(storageId int, ms MessageStorage, DbId string)
+
+	// Callback for when a new response is saved
+	NewResponseSaved(storageId int, ms MessageStorage, rsp *ProxyResponse)
+	// Callback for when a response is updated
+	ResponseUpdated(storageId int, ms MessageStorage, rsp *ProxyResponse)
+	// Callback for when a response is deleted
+	ResponseDeleted(storageId int, ms MessageStorage, DbId string)
+
+	// Callback for when a new wsmessage is saved
+	NewWSMessageSaved(storageId int, ms MessageStorage, req *ProxyRequest, wsm *ProxyWSMessage)
+	// Callback for when a wsmessage is updated
+	WSMessageUpdated(storageId int, ms MessageStorage, req *ProxyRequest, wsm *ProxyWSMessage)
+	// Callback for when a wsmessage is deleted
+	WSMessageDeleted(storageId int, ms MessageStorage, DbId string)
+}
+
+type globalWatcher struct {
+	watchers []GlobalStorageWatcher
+}
+
+type globalWatcherShim struct {
+	storageId   int
+	globWatcher *globalWatcher
+	logger *log.Logger
+}
+
 // InterceptingProxy is a struct which represents a proxy which can intercept and modify HTTP and websocket messages
 type InterceptingProxy struct {
 	slistener    *ProxyListener
@@ -54,6 +87,7 @@ type InterceptingProxy struct {
 	httpHandlers map[string]ProxyWebUIHandler
 
 	messageStorage map[int]*savedStorage
+	globWatcher *globalWatcher
 }
 
 // ProxyCredentials are a username/password combination used to represent an HTTP BasicAuth session
@@ -111,6 +145,9 @@ func NewInterceptingProxy(logger *log.Logger) *InterceptingProxy {
 	iproxy.server = newProxyServer(useLogger, &iproxy)
 	iproxy.logger = useLogger
 	iproxy.httpHandlers = make(map[string]ProxyWebUIHandler)
+	iproxy.globWatcher = &globalWatcher{
+		watchers: make([]GlobalStorageWatcher, 0),
+	}
 
 	go func() {
 		iproxy.server.Serve(iproxy.slistener)
@@ -189,6 +226,13 @@ func (iproxy *InterceptingProxy) AddMessageStorage(storage MessageStorage, descr
 	defer iproxy.mtx.Unlock()
 	id := getNextStorageId()
 	iproxy.messageStorage[id] = &savedStorage{storage, description}
+
+	shim := &globalWatcherShim{
+		storageId: id,
+		globWatcher: iproxy.globWatcher,
+		logger: iproxy.logger,
+	}
+	storage.Watch(shim)
 	return id
 }
 
@@ -492,6 +536,28 @@ func (iproxy *InterceptingProxy) RemoveWSInterceptor(sub *WSIntSub) {
 	}
 }
 
+// Add a global storage watcher
+func (iproxy *InterceptingProxy) GlobalStorageWatch(watcher GlobalStorageWatcher) error {
+	iproxy.mtx.Lock()
+	defer iproxy.mtx.Unlock()
+	iproxy.globWatcher.watchers = append(iproxy.globWatcher.watchers, watcher)
+	return nil
+}
+
+// Remove a global storage watcher
+func (iproxy *InterceptingProxy) GlobalStorageEndWatch(watcher GlobalStorageWatcher) error {
+	iproxy.mtx.Lock()
+	defer iproxy.mtx.Unlock()
+	var newWatched = make([]GlobalStorageWatcher, 0)
+	for _, testWatcher := range iproxy.globWatcher.watchers {
+		if (testWatcher != watcher) {
+			newWatched = append(newWatched, testWatcher)
+		}
+	}
+	iproxy.globWatcher.watchers = newWatched
+	return nil
+}
+
 // SetProxyStorage sets which storage should be used to store messages as they pass through the proxy
 func (iproxy *InterceptingProxy) SetProxyStorage(storageId int) error {
 	iproxy.mtx.Lock()
@@ -916,3 +982,59 @@ func newProxyServer(logger *log.Logger, iproxy *InterceptingProxy) *http.Server
 	}
 	return server
 }
+
+// StorageWatcher implementation
+func (watcher *globalWatcherShim) NewRequestSaved(ms MessageStorage, req *ProxyRequest) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.NewRequestSaved(watcher.storageId, ms, req)
+	}
+}
+
+func (watcher *globalWatcherShim) RequestUpdated(ms MessageStorage, req *ProxyRequest) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.RequestUpdated(watcher.storageId, ms, req)
+	}
+}
+
+func (watcher *globalWatcherShim) RequestDeleted(ms MessageStorage, DbId string) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.RequestDeleted(watcher.storageId, ms, DbId)
+	}
+}
+
+func (watcher *globalWatcherShim) NewResponseSaved(ms MessageStorage, rsp *ProxyResponse) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.NewResponseSaved(watcher.storageId, ms, rsp)
+	}
+}
+
+func (watcher *globalWatcherShim) ResponseUpdated(ms MessageStorage, rsp *ProxyResponse) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.ResponseUpdated(watcher.storageId, ms, rsp)
+	}
+}
+
+func (watcher *globalWatcherShim) ResponseDeleted(ms MessageStorage, DbId string) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.ResponseDeleted(watcher.storageId, ms, DbId)
+	}
+}
+
+func (watcher *globalWatcherShim) NewWSMessageSaved(ms MessageStorage, req *ProxyRequest, wsm *ProxyWSMessage) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.NewWSMessageSaved(watcher.storageId, ms, req, wsm)
+	}
+}
+
+func (watcher *globalWatcherShim) WSMessageUpdated(ms MessageStorage, req *ProxyRequest, wsm *ProxyWSMessage) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.WSMessageUpdated(watcher.storageId, ms, req, wsm)
+	}
+}
+
+func (watcher *globalWatcherShim) WSMessageDeleted(ms MessageStorage, DbId string) {
+	for _, w := range watcher.globWatcher.watchers {
+		w.WSMessageDeleted(watcher.storageId, ms, DbId)
+	}
+}
+

proxymessages.go

@@ -55,6 +55,8 @@ func NewProxyMessageListener(logger *log.Logger, iproxy *InterceptingProxy) *Mes
 	l.AddHandler("liststorage", listProxyStorageHandler)
 	l.AddHandler("setproxy", setProxyHandler)
 	l.AddHandler("watchstorage", watchStorageHandler)
+	l.AddHandler("setpluginvalue", setPluginValueHandler)
+	l.AddHandler("getpluginvalue", getPluginValueHandler)
 
 	return l
 }
@@ -1949,13 +1951,11 @@ func setProxyHandler(b []byte, c net.Conn, logger *log.Logger, iproxy *Intercept
 WatchStorage
 */
 type watchStorageMessage struct {
-	StorageId   int
 	HeadersOnly bool
 }
 
 type proxyMsgStorageWatcher struct {
 	connMtx sync.Mutex
-	storageId int
 	headersOnly bool
 	conn net.Conn
 }
@@ -1971,77 +1971,95 @@ type storageUpdateResponse struct {
 
 // Implement watcher
 
-func (sw *proxyMsgStorageWatcher) NewRequestSaved(ms MessageStorage, req *ProxyRequest) {
-	var msgRsp storageUpdateResponse
+func (sw *proxyMsgStorageWatcher) NewRequestSaved(storageId int, ms MessageStorage, req *ProxyRequest) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
+	msgRsp := &storageUpdateResponse{}
 	msgRsp.Request = NewRequestJSON(req, sw.headersOnly)
 	msgRsp.Action = "NewRequest"
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
-func (sw *proxyMsgStorageWatcher) RequestUpdated(ms MessageStorage, req *ProxyRequest) {
-	var msgRsp storageUpdateResponse
+func (sw *proxyMsgStorageWatcher) RequestUpdated(storageId int, ms MessageStorage, req *ProxyRequest) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
+	msgRsp := &storageUpdateResponse{}
 	msgRsp.Request = NewRequestJSON(req, sw.headersOnly)
 	msgRsp.Action = "RequestUpdated"
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
-func (sw *proxyMsgStorageWatcher) RequestDeleted(ms MessageStorage, DbId string) {
-	var msgRsp storageUpdateResponse
+func (sw *proxyMsgStorageWatcher) RequestDeleted(storageId int, ms MessageStorage, DbId string) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
+	msgRsp := &storageUpdateResponse{}
 	msgRsp.Action = "RequestDeleted"
 	msgRsp.MessageId = DbId
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
-func (sw *proxyMsgStorageWatcher) NewResponseSaved(ms MessageStorage, rsp *ProxyResponse) {
-	var msgRsp storageUpdateResponse
+func (sw *proxyMsgStorageWatcher) NewResponseSaved(storageId int, ms MessageStorage, rsp *ProxyResponse) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
+	msgRsp := &storageUpdateResponse{}
 	msgRsp.Response = NewResponseJSON(rsp, sw.headersOnly)
 	msgRsp.Action = "NewResponse"
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
-func (sw *proxyMsgStorageWatcher) ResponseUpdated(ms MessageStorage, rsp *ProxyResponse) {
-	var msgRsp storageUpdateResponse
+func (sw *proxyMsgStorageWatcher) ResponseUpdated(storageId int, ms MessageStorage, rsp *ProxyResponse) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
+	msgRsp := &storageUpdateResponse{}
 	msgRsp.Response = NewResponseJSON(rsp, sw.headersOnly)
 	msgRsp.Action = "ResponseUpdated"
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
-func (sw *proxyMsgStorageWatcher) ResponseDeleted(ms MessageStorage, DbId string) {
-	var msgRsp storageUpdateResponse
+func (sw *proxyMsgStorageWatcher) ResponseDeleted(storageId int, ms MessageStorage, DbId string) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
+	msgRsp := &storageUpdateResponse{}
 	msgRsp.Action = "ResponseDeleted"
 	msgRsp.MessageId = DbId
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
-func (sw *proxyMsgStorageWatcher) NewWSMessageSaved(ms MessageStorage, req *ProxyRequest, wsm *ProxyWSMessage) {
-	var msgRsp storageUpdateResponse
+func (sw *proxyMsgStorageWatcher) NewWSMessageSaved(storageId int, ms MessageStorage, req *ProxyRequest, wsm *ProxyWSMessage) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
+	msgRsp := &storageUpdateResponse{}
 	msgRsp.Request = NewRequestJSON(req, sw.headersOnly)
 	msgRsp.WSMessage = NewWSMessageJSON(wsm)
 	msgRsp.Action = "NewWSMessage"
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
-func (sw *proxyMsgStorageWatcher) WSMessageUpdated(ms MessageStorage, req *ProxyRequest, wsm *ProxyWSMessage) {
-	var msgRsp storageUpdateResponse
+func (sw *proxyMsgStorageWatcher) WSMessageUpdated(storageId int, ms MessageStorage, req *ProxyRequest, wsm *ProxyWSMessage) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
+	msgRsp := &storageUpdateResponse{}
 	msgRsp.Request = NewRequestJSON(req, sw.headersOnly)
 	msgRsp.WSMessage = NewWSMessageJSON(wsm)
 	msgRsp.Action = "WSMessageUpdated"
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
-func (sw *proxyMsgStorageWatcher) WSMessageDeleted(ms MessageStorage, DbId string) {
+func (sw *proxyMsgStorageWatcher) WSMessageDeleted(storageId int, ms MessageStorage, DbId string) {
+	sw.connMtx.Lock()
+	defer sw.connMtx.Unlock()
 	var msgRsp storageUpdateResponse
 	msgRsp.Action = "WSMessageDeleted"
 	msgRsp.MessageId = DbId
-	msgRsp.StorageId = sw.storageId
+	msgRsp.StorageId = storageId
 	MessageResponse(sw.conn, msgRsp)
 }
 
@@ -2054,36 +2072,13 @@ func watchStorageHandler(b []byte, c net.Conn, logger *log.Logger, iproxy *Inter
 		return
 	}
 
-	// Parse storageId
-	storages := make([]*SavedStorage, 0)
-	if mreq.StorageId == -1 {
-		storages = iproxy.ListMessageStorage()
-	} else {
-		ms, desc := iproxy.GetMessageStorage(mreq.StorageId)
-		if ms == nil {
-			ErrorResponse(c, "invalid storage id")
-			return
-		}
-
-		storage := &SavedStorage{
-			Id: mreq.StorageId,
-			Storage: ms,
-			Description: desc,
-		}
-		storages = append(storages, storage)
-	}
-
-	// Create the watchers
-	for _, storage := range storages {
-		watcher := &proxyMsgStorageWatcher{
-			storageId: storage.Id,
-			headersOnly: mreq.HeadersOnly,
-			conn: c,
-		}
-		// Apply the watcher, kill them at end of connection
-		storage.Storage.Watch(watcher)
-		defer storage.Storage.EndWatch(watcher)
+	// add global watcher
+	watcher := &proxyMsgStorageWatcher{
+		headersOnly: mreq.HeadersOnly,
+		conn: c,
 	}
+	iproxy.GlobalStorageWatch(watcher)
+	defer iproxy.GlobalStorageEndWatch(watcher)
 
 	// Keep the connection open
 	MessageResponse(c, &successResult{Success: true})
@@ -2094,3 +2089,88 @@ func watchStorageHandler(b []byte, c net.Conn, logger *log.Logger, iproxy *Inter
 	}
 }
 
+/*
+SetPluginValue and GetPluginValue
+*/
+type setPluginValueMessage struct {
+	Key     string
+	Value   string
+	Storage int
+}
+
+func setPluginValueHandler(b []byte, c net.Conn, logger *log.Logger, iproxy *InterceptingProxy) {
+	mreq := setPluginValueMessage{}
+
+	if err := json.Unmarshal(b, &mreq); err != nil {
+		ErrorResponse(c, "error parsing message")
+		return
+	}
+
+	if mreq.Storage == 0 {
+		ErrorResponse(c, "storage is required")
+		return
+	}
+
+	storage, _ := iproxy.GetMessageStorage(mreq.Storage)
+	if storage == nil {
+		ErrorResponse(c, fmt.Sprintf("storage with id %d does not exist", mreq.Storage))
+		return
+	}
+
+	if mreq.Key == "" {
+		ErrorResponse(c, "key value is required")
+		return
+	}
+
+	err := storage.SetPluginValue(mreq.Key, mreq.Value)
+	if err != nil {
+		ErrorResponse(c, fmt.Sprintf("error saving value: %s", err.Error()))
+		return
+	}
+
+	MessageResponse(c, &successResult{Success: true})
+}
+
+type getPluginValueMessage struct {
+	Key     string
+	Storage int
+}
+
+type getPluginValueResponse struct {
+	Value     string
+	Success   bool
+}
+
+func getPluginValueHandler(b []byte, c net.Conn, logger *log.Logger, iproxy *InterceptingProxy) {
+	mreq := getPluginValueMessage{}
+
+	if err := json.Unmarshal(b, &mreq); err != nil {
+		ErrorResponse(c, "error parsing message")
+		return
+	}
+
+	if mreq.Storage == 0 {
+		ErrorResponse(c, "storage is required")
+		return
+	}
+
+	storage, _ := iproxy.GetMessageStorage(mreq.Storage)
+	if storage == nil {
+		ErrorResponse(c, fmt.Sprintf("storage with id %d does not exist", mreq.Storage))
+		return
+	}
+
+	if mreq.Key == "" {
+		ErrorResponse(c, "key value is required")
+		return
+	}
+
+	value, err := storage.GetPluginValue(mreq.Key)
+	if err != nil {
+		ErrorResponse(c, fmt.Sprintf("error getting value: %s", err.Error()))
+		return
+	}
+
+	MessageResponse(c, &getPluginValueResponse{Value: value, Success: true})
+}
+

schema.go

@@ -19,6 +19,7 @@ type tableNameRow struct {
 var schemaUpdaters = []schemaUpdater{
 	schema8,
 	schema9,
+	schema10,
 }
 
 func UpdateSchema(db *sql.DB, logger *log.Logger) error {
@@ -543,3 +544,27 @@ func schema9(tx *sql.Tx) error {
 	}
 	return nil
 }
+
+func schema10(tx *sql.Tx) error {
+	/*
+	   Create a "plugin data" table to let applications store app-specific data in the datafile
+	*/
+	cmds := []string{`
+    CREATE TABLE plugin_data (
+            id     INTEGER   PRIMARY KEY  AUTOINCREMENT,
+            key    TEXT      UNIQUE,
+            value  STRING
+        );
+    CREATE INDEX plugin_key_ind ON plugin_data(key);
+    `,
+
+	`UPDATE schema_meta SET version=10`,
+	}
+
+	err := executeMultiple(tx, cmds)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

sqlitestorage.go

@@ -1651,3 +1651,68 @@ func (ms *SQLiteStorage) EndWatch(watcher StorageWatcher) error {
 	ms.mtx.Unlock()
 	return nil
 }
+
+func (ms *SQLiteStorage) SetPluginValue(key string, value string) error {
+	ms.mtx.Lock()
+	defer ms.mtx.Unlock()
+	tx, err := ms.dbConn.Begin()
+	if err != nil {
+		return err
+	}
+	err = ms.setPluginValue(tx, key, value)
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+	tx.Commit()
+	return nil
+}
+
+func (ms *SQLiteStorage) setPluginValue(tx *sql.Tx, key string, value string) error {
+	stmt, err := tx.Prepare(`
+    INSERT OR REPLACE INTO plugin_data (
+            key,
+            value
+    ) VALUES (?, ?);
+    `)
+	if err != nil {
+		return fmt.Errorf("error preparing statement to insert request into database: %s", err.Error())
+	}
+	defer stmt.Close()
+
+	_, err = stmt.Exec(key, value)
+	if err != nil {
+		return fmt.Errorf("error inserting plugin data into database: %s", err.Error())
+	}
+
+	return nil
+}
+
+func (ms *SQLiteStorage) GetPluginValue(key string) (string, error) {
+	ms.mtx.Lock()
+	defer ms.mtx.Unlock()
+	tx, err := ms.dbConn.Begin()
+	if err != nil {
+		return "", err
+	}
+	value, err := ms.getPluginValue(tx, key)
+	if err != nil {
+		tx.Rollback()
+		return "", err
+	}
+	tx.Commit()
+	return value, nil
+}
+
+func (ms *SQLiteStorage) getPluginValue(tx *sql.Tx, key string) (string, error) {
+	var value sql.NullString
+	err := tx.QueryRow(`SELECT value FROM plugin_data WHERE key=?`, key).Scan(
+		&value,
+	)
+	if err == sql.ErrNoRows {
+		return "", fmt.Errorf("plugin data with key %s does not exist", key)
+	} else if err != nil {
+		return "", fmt.Errorf("error loading data from datafile: %s", err.Error())
+	}
+	return value.String, nil
+}

storage.go

@@ -66,6 +66,10 @@ type MessageStorage interface {
 	Watch(watcher StorageWatcher) error
 	// Remove a storage watcher from the storage
 	EndWatch(watcher StorageWatcher) error
+
+	// Set/get plugin values
+	SetPluginValue(key string, value string) error
+	GetPluginValue(key string) (string, error)
 }
 
 type StorageWatcher interface {