The Big Renaming - etherpad is now an NPM module

src/node/handler/ImportHandler.js

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+/**
+ * Handles the import requests
+ */
+
+/*
+ * 2011 Peter 'Pita' Martischka (Primary Technology Ltd)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file 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.
+ */
+
+var ERR = require("async-stacktrace");
+var padManager = require("../db/PadManager");
+var padMessageHandler = require("./PadMessageHandler");
+var async = require("async");
+var fs = require("fs");
+var settings = require('../utils/Settings');
+var formidable = require('formidable');
+var os = require("os");
+
+//load abiword only if its enabled
+if(settings.abiword != null)
+  var abiword = require("../utils/Abiword");
+
+var tempDirectory = "/tmp/";
+
+//tempDirectory changes if the operating system is windows
+if(os.type().indexOf("Windows") > -1)
+{
+  tempDirectory = process.env.TEMP;
+}
+  
+/**
+ * do a requested import
+ */ 
+exports.doImport = function(req, res, padId)
+{
+  //pipe to a file
+  //convert file to text via abiword
+  //set text in the pad
+  
+  var srcFile, destFile;
+  var pad;
+  var text;
+  
+  async.series([
+    //save the uploaded file to /tmp
+    function(callback)
+    {
+      var form = new formidable.IncomingForm();
+      form.keepExtensions = true;
+      form.uploadDir = tempDirectory;
+      
+      form.parse(req, function(err, fields, files) 
+      { 
+        //the upload failed, stop at this point
+        if(err || files.file === undefined)
+        {
+          console.warn("Uploading Error: " + err.stack);
+          callback("uploadFailed");
+        }
+        //everything ok, continue
+        else 
+        {
+          //save the path of the uploaded file
+          srcFile = files.file.path;
+          callback();
+        }
+      });
+    },
+    
+    //ensure this is a file ending we know, else we change the file ending to .txt
+    //this allows us to accept source code files like .c or .java
+    function(callback)
+    {
+      var fileEnding = srcFile.split(".")[1].toLowerCase();
+      var knownFileEndings = ["txt", "doc", "docx", "pdf", "odt", "html", "htm"];
+      
+      //find out if this is a known file ending
+      var fileEndingKnown = false;
+      for(var i in knownFileEndings)
+      {
+        if(fileEnding == knownFileEndings[i])
+        {
+          fileEndingKnown = true;
+        }
+      }
+      
+      //if the file ending is known, continue as normal
+      if(fileEndingKnown)
+      {
+        callback();
+      }
+      //we need to rename this file with a .txt ending
+      else
+      {
+        var oldSrcFile = srcFile;
+        srcFile = srcFile.split(".")[0] + ".txt";
+        
+        fs.rename(oldSrcFile, srcFile, callback);
+      }
+    },
+    
+    //convert file to text
+    function(callback)
+    {
+      var randNum = Math.floor(Math.random()*0xFFFFFFFF);
+      destFile = tempDirectory + "eplite_import_" + randNum + ".txt";
+      abiword.convertFile(srcFile, destFile, "txt", callback);
+    },
+    
+    //get the pad object
+    function(callback)
+    {
+      padManager.getPad(padId, function(err, _pad)
+      {
+        if(ERR(err, callback)) return;
+        pad = _pad;
+        callback();
+      });
+    },
+    
+    //read the text
+    function(callback)
+    {
+      fs.readFile(destFile, "utf8", function(err, _text)
+      {
+        if(ERR(err, callback)) return;
+        text = _text;
+        
+        //node on windows has a delay on releasing of the file lock.  
+        //We add a 100ms delay to work around this
+	      if(os.type().indexOf("Windows") > -1)
+	      {
+          setTimeout(function()
+          {
+            callback();
+          }, 100);
+	      }
+	      else
+	      {
+	        callback();
+	      }
+      });
+    },
+    
+    //change text of the pad and broadcast the changeset
+    function(callback)
+    {
+      pad.setText(text);
+      padMessageHandler.updatePadClients(pad, callback);
+    },
+    
+    //clean up temporary files
+    function(callback)
+    {
+      async.parallel([
+        function(callback)
+        {
+          fs.unlink(srcFile, callback);
+        },
+        function(callback)
+        {
+          fs.unlink(destFile, callback);
+        }
+      ], callback);
+    }
+  ], function(err)
+  {
+    //the upload failed, there is nothing we can do, send a 500
+    if(err == "uploadFailed")
+    {
+      res.send(500);
+      return;
+    }
+
+    ERR(err);
+  
+    //close the connection
+    res.send("ok");
+  });
+}