add node.js api server for CDT

/api call need node.js api server
to fix when clicking the Synchronize
Definition Parameter.

Change-Id: I4a3fd1ba045ed41fb2fdfec3b8f0364cd6ec05f5
Issue-ID: APPC-1600
Signed-off-by: Taka Cho <takamune.cho@att.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/src/app/srvlogger.js b/src/app/srvlogger.js
new file mode 100755
index 0000000..22c6d83
--- /dev/null
+++ b/src/app/srvlogger.js
@@ -0,0 +1,96 @@
+/*
+============LICENSE_START==========================================
+===================================================================
+Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+===================================================================
+
+Unless otherwise specified, all software contained herein is licensed
+under the Apache License, Version 2.0 (the License);
+you may not use this software except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+============LICENSE_END============================================ */
+//.. srvlogger.js -logging in file system
+const fs = require('fs');
+
+const clName= "srvlogger";
+
+var MaxLogSize= 5000000;
+var LogFileNm;
+var fdL;
+
+exports.addLog = function( logStr, fileNm ) {
+
+  this.LogFileNm= fileNm
+  this.fdL= fs.openSync( this.LogFileNm, 'a' );
+ // console.log(clName+": log opened. fdL="+this.fdL);
+
+  var lfStats= fs.fstatSync( this.fdL );
+  if( lfStats.size + logStr.length >= MaxLogSize )
+  {
+    this.changeLogFile();
+  };
+
+  try {
+    fs.appendFileSync( this.fdL, logStr, 'utf8' );
+  }
+  catch( err ) {
+    console.log(clName+": log append: error:"+err.message );
+    throw err;
+  };
+  fs.closeSync( this.fdL );
+}
+
+exports.changeLogFile = function() {
+
+  var msgO= "\n=== The Log reached max size. Changing the file. ===\n";
+  try {
+    fs.appendFileSync( this.fdL, msgO, 'utf8' );
+  }
+  catch( err ) {
+    console.log(clName+": log append: error:"+err.message );
+    throw err;
+  };
+  fs.closeSync( this.fdL );
+
+  var LogFileNm_o= this.LogFileNm +".old";
+  try {
+    fs.renameSync( this.LogFileNm, LogFileNm_o );
+  }
+  catch( err ) {
+    throw err;
+  };
+
+  try {
+    this.fdL= fs.openSync( this.LogFileNm, 'a' );
+  }
+  catch( err ) {
+    console.log(clName+": New Log file open: error:["+err.message+"]\n");
+    throw err;
+  }
+  console.log( clName+": New Log file opened: fdL="+this.fdL+"\n");
+
+  var msgN= "\n=== New Log file ===\n";
+  try {
+    fs.appendFileSync( this.fdL, msgN, 'utf8' );
+  }
+  catch( err ) {
+    console.log( clName+": new log append: error:"+err.message );
+    throw err;
+  };
+}
+
+exports.setMaxLogSize = function( newMaxLogSize ) {
+  if( newMaxLogSize > 0 )
+    MaxLogSize= newMaxLogSize;
+  else
+    console.log(clName+": Wrong arg: newMaxLogSize <= 0 !");
+}