TTS.js

module.exports = function(RED) { 
   function TextToSpeechNode(config){
      var http=require('https');
      var fs=require('fs');
      this.context = {global:RED.settings.functionGlobalContext || {}};
      RED.nodes.createNode(this,config);
      var node = this;
      this.name=config.name;
      this.text=config.text;
      this.tmp_dir=config.tmp_dir;
      this.blackflag=config.blackflag;
      var wav=new Buffer(100000);

      this.on('input', function(msg) {
            if(msg.payload.text)
            this.text=msg.payload.text;
            if(msg.tmp_dir)
               this.tmp_dir=msg.tmp_dir;
             console.log("tmp_dir  "+this.tmp_dir);
             console.log("msg.text "+msg.text);
             console.log("this.text "+this.text);

             var headers={ 'Content-Type': 'text/plain', 'Accept': 'audio/x-wav','Content-Length':this.text.length };
             headers.Authorization="Bearer "+this.context.global[this.blackflag];
             console.log(headers);
             var options = {
                 hostname: 'api.att.com',
                 port: 443,
                 path: '/speech/v3/textToSpeech',
                 method: 'POST'
              };

                    var file_name="";
                    file_name+=this.tmp_dir;
                    var date=new Date().getTime();
                    var short_name="";
                    short_name+=date.toString()+".wav";
                    file_name+="/"+short_name;
                   
                 options.headers=headers;
                 var req=http.request(options,function(res){
                 var i=0;
                 res.on('data',function(chunk){
                       fs.appendFileSync(file_name,chunk);
                       console.log("got a chunk");
                       if(i==0){ 
                          msg.payload.audio_file=short_name;
                          node.send(msg);
                          i=1;
                       }
                    });
                 });
                 req.on('error',function(e){
                    console.log('problem with request: ' +e.message);
                 });
                 console.log(this.text);
                 req.write(this.text);
                 req.end();


                        // do something with 'msg' 
                });
      }
      RED.nodes.registerType("T SPEECH",TextToSpeechNode);
}