зеркало из https://github.com/mozilla/gecko-dev.git
r=dougt,brendan a=dougt
not part of the build. --pete
This commit is contained in:
pete%alphanumerica.com
Родитель
0eb33fd920
Коммит
7f540ada8a
|
|
@ -0,0 +1,495 @@
|
|||
/*************
|
||||
|
||||
The contents of this file are subject to the Mozilla Public
|
||||
License Version 1.1 (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.mozilla.org/MPL/
|
||||
|
||||
Software distributed under the License is distributed on an "AS
|
||||
IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
||||
implied. See the License for the specific language governing
|
||||
rights and limitations under the License.
|
||||
|
||||
The Original Code is Alphanumerica code.
|
||||
The Initial Developer of the Original Code is Alphanumerica.
|
||||
|
||||
Portions created by Alphanumerica are
|
||||
Copyright (C) 2000 Alphanumerica. All
|
||||
Rights Reserved.
|
||||
|
||||
Contributor(s): Pete Collins, Doug Turner, Brendan Eich, Warren Harris
|
||||
|
||||
|
||||
*******
|
||||
*
|
||||
* JS File IO API (The purpose of this file is to make it a little easier to do file IO from js)
|
||||
*
|
||||
* io.js
|
||||
*
|
||||
* Function List
|
||||
*
|
||||
* 1. open(path, mode);
|
||||
* 2. exists(path);
|
||||
* 3. read(path);
|
||||
* 4. write(contents, permissions);
|
||||
* 5. append(dirPath, fileName);
|
||||
* 6. mkdir(path, permissions);
|
||||
*
|
||||
* Instructions:
|
||||
*
|
||||
* First include this js file
|
||||
*
|
||||
* file = new File();
|
||||
*
|
||||
* to open a file for reading<"r">, writing<"w"> or appending<"a">,
|
||||
* just call:
|
||||
*
|
||||
* file.open('/path/i/want/to/open', "w");
|
||||
*
|
||||
* where in this case you will be creating a new file called:
|
||||
* '/path/i/want/to/open'
|
||||
* with a mode of "w" which means you want to write a new file.
|
||||
*
|
||||
* If you want to read from a file, just call:
|
||||
*
|
||||
* file.open('/path/i/want/to/open', "r");
|
||||
*
|
||||
* var theFilesContents = file.read();
|
||||
*
|
||||
* the file contents will be returned to the caller
|
||||
* so you can do something usefull with it
|
||||
*
|
||||
* file.close();
|
||||
*
|
||||
* destroys any created objects
|
||||
*
|
||||
* if you forget to use file.close() no probs all objects are discarded anyway
|
||||
*
|
||||
* Warning: these API's are not for religious types
|
||||
*
|
||||
*************/
|
||||
|
||||
////////////////// Globals //////////////////////
|
||||
|
||||
var FilePath = new Components.Constructor( "component://mozilla/file/local", "nsILocalFile", "initWithPath");
|
||||
var FileChannel = new Components.Constructor( "component://netscape/network/local-file-channel", "nsIFileChannel" );
|
||||
var InputStream = new Components.Constructor( "component://netscape/scriptableinputstream", "nsIScriptableInputStream" );
|
||||
|
||||
////////////////// Globals //////////////////////
|
||||
|
||||
|
||||
////////////////// File Object Class /////////////////////
|
||||
|
||||
function File(path, mode){
|
||||
|
||||
if(path)
|
||||
this.open(path,mode);
|
||||
|
||||
} // constructor
|
||||
|
||||
File.prototype = {
|
||||
|
||||
mode : null,
|
||||
|
||||
fileInst : null,
|
||||
|
||||
fileChannel : null,
|
||||
|
||||
inputStream : null,
|
||||
|
||||
/********************* EXISTS ***************************/
|
||||
|
||||
exists : function (path) {
|
||||
|
||||
if(!path){
|
||||
dump("Missing path argument . . . \n\n");
|
||||
return;
|
||||
}
|
||||
|
||||
dump("\n\n**** Checking to see if the file exists ****\n\n");
|
||||
|
||||
try{
|
||||
|
||||
if(!this.fileInst)
|
||||
this.fileInst = new FilePath(path);
|
||||
|
||||
fileExists = this.fileInst.exists();
|
||||
|
||||
}
|
||||
|
||||
catch(error) { dump("**** ERROR:"+error+"\n\n"); }
|
||||
|
||||
dump("File \""+path+"\" exists = "+fileExists+"\n\n");
|
||||
|
||||
return fileExists;
|
||||
},
|
||||
|
||||
/********************* EXISTS ***************************/
|
||||
|
||||
|
||||
/********************* OPEN *****************************/
|
||||
|
||||
|
||||
open : function(path, setMode){
|
||||
|
||||
if(!setMode)
|
||||
setMode="r";
|
||||
|
||||
switch(setMode){
|
||||
|
||||
|
||||
case "w":
|
||||
|
||||
dump("open file for writing\n\n");
|
||||
|
||||
if(!path || !setMode){
|
||||
dump("Missing path or mode in arguments . . .\n\n");
|
||||
return;
|
||||
}
|
||||
|
||||
try{
|
||||
|
||||
dump("Closing any existing handles . . . \n\n");
|
||||
this.close();
|
||||
|
||||
this.fileInst = new FilePath( path );
|
||||
|
||||
var fileExists = this.exists( path );
|
||||
|
||||
if(fileExists){
|
||||
|
||||
dump("deleting old file and creating a new one . . . \n\n");
|
||||
this.fileInst["delete"](false);
|
||||
fileExists=false;
|
||||
|
||||
}
|
||||
|
||||
if (!fileExists){
|
||||
dump("\n\nCreating new file "+path+"\n\n");
|
||||
this.fileInst.create(0, 0644);
|
||||
fileExists=true;
|
||||
}
|
||||
|
||||
this.mode=8;
|
||||
return;
|
||||
|
||||
}
|
||||
|
||||
catch (error){ dump("**** ERROR:"+error+"\n\n"); }
|
||||
break;
|
||||
|
||||
|
||||
|
||||
case "a":
|
||||
|
||||
dump("open file for appending\n\n");
|
||||
|
||||
if(!path || !setMode){
|
||||
dump("Missing path or mode in arguments . . .\n\n");
|
||||
return;
|
||||
}
|
||||
|
||||
try{
|
||||
|
||||
dump("Closing any existing handles . . . \n\n");
|
||||
this.close();
|
||||
|
||||
this.fileInst = new FilePath(path);
|
||||
|
||||
var fileExists = this.exists(path);
|
||||
|
||||
if ( !fileExists ){
|
||||
dump("\n\nCreating new file "+path+"\n\n");
|
||||
this.fileInst.create(0, 0644);
|
||||
fileExists=true;
|
||||
}
|
||||
|
||||
this.mode=16;
|
||||
return;
|
||||
|
||||
}
|
||||
|
||||
|
||||
catch (error){ dump("**** ERROR:"+error+"\n\n"); }
|
||||
break;
|
||||
|
||||
|
||||
|
||||
case "r":
|
||||
|
||||
dump("open file for reading\n\n");
|
||||
|
||||
if(!path){
|
||||
dump("Missing path argument . . . \n\n");
|
||||
return;
|
||||
}
|
||||
|
||||
dump("Closing any existing handles . . . \n\n");
|
||||
this.close();
|
||||
|
||||
try {
|
||||
|
||||
this.fileInst = new FilePath(path);
|
||||
this.fileChannel = new FileChannel();
|
||||
this.inputStream = new InputStream();
|
||||
|
||||
}
|
||||
|
||||
catch (error){ dump("**** ERROR:"+error+"\n\n"); }
|
||||
break;
|
||||
|
||||
|
||||
default:
|
||||
dump("\n\n**** WARNING: \""+setMode+"\" is an Invalid file mode\n\n");
|
||||
|
||||
}
|
||||
|
||||
},
|
||||
|
||||
/********************* OPEN *****************************/
|
||||
|
||||
|
||||
/********************* WRITE ****************************/
|
||||
|
||||
write : function(buffer, perms){
|
||||
|
||||
if(!this.fileInst){
|
||||
dump("Please open a file handle first . . .\n");
|
||||
return;
|
||||
}
|
||||
|
||||
if(!buffer)
|
||||
buffer = " ";
|
||||
var buffSize = buffer.length;
|
||||
|
||||
try{
|
||||
|
||||
if(!this.fileChannel)
|
||||
this.fileChannel = new FileChannel();
|
||||
|
||||
if(perms){
|
||||
|
||||
var checkPerms = this.validatePermissions( perms );
|
||||
|
||||
if(!checkPerms){
|
||||
dump("**** Sorry invalid permissions set\n\n");
|
||||
return;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
if(!perms)
|
||||
perms=0644;
|
||||
|
||||
dump("trying to initialize filechannel\n\n");
|
||||
|
||||
this.fileChannel.init(this.fileInst, this.mode, perms)
|
||||
this.fileInst.permissions=perms;
|
||||
|
||||
dump("initialized filechannel and set desired permissions\n\n");
|
||||
|
||||
|
||||
var fileSize = parseInt( this.fileInst.fileSize );
|
||||
dump("got initial file size = "+fileSize+"\n\n");
|
||||
|
||||
var outStream = this.fileChannel.openOutputStream();
|
||||
dump("got outStream\n\n");
|
||||
|
||||
|
||||
if( outStream.Write(buffer, buffSize) )
|
||||
dump("Write to file successful . . . \n\n");
|
||||
|
||||
outStream.Flush();
|
||||
|
||||
}
|
||||
|
||||
catch (error){ dump("**** ERROR:"+error+"\n\n"); }
|
||||
|
||||
},
|
||||
|
||||
/********************* WRITE ****************************/
|
||||
|
||||
|
||||
/********************* READ *****************************/
|
||||
|
||||
read : function() {
|
||||
|
||||
try {
|
||||
|
||||
if(!this.fileInst || !this.fileChannel || !this.inputStream){
|
||||
dump("Please open a valid file handle for reading . . .\n");
|
||||
return null;
|
||||
}
|
||||
|
||||
|
||||
var fileExists = this.exists(this.fileInst.path);
|
||||
|
||||
if(!fileExists) {
|
||||
dump("WARNING: \""+this.fileInst.path+"\" does not exist...\n");
|
||||
return;
|
||||
}
|
||||
|
||||
var offset = this.fileInst.fileSize;
|
||||
var perm = this.fileInst.permissions;
|
||||
|
||||
dump("PATH i am trying to read = " + this.fileInst.path + "\n");
|
||||
|
||||
this.fileChannel.init(this.fileInst, 1, perm);
|
||||
|
||||
var inStream = this.fileChannel.openInputStream();
|
||||
|
||||
this.inputStream.init(inStream);
|
||||
|
||||
var fileContents = this.inputStream.read(this.fileInst.fileSize);
|
||||
|
||||
dump(fileContents);
|
||||
|
||||
inStream.Close();
|
||||
|
||||
return fileContents;
|
||||
|
||||
}
|
||||
|
||||
catch (error){ dump("**** ERROR:"+error+"\n\n"); }
|
||||
|
||||
},
|
||||
|
||||
/********************* READ *****************************/
|
||||
|
||||
|
||||
|
||||
/********************* MKDIR ****************************/
|
||||
|
||||
mkdir : function(path, permissions){
|
||||
|
||||
dump("Closing any existing handles . . . \n\n");
|
||||
this.close();
|
||||
|
||||
if(!path){
|
||||
dump("Missing path in argument . . .\n\n");
|
||||
return;
|
||||
}
|
||||
|
||||
var fileExists = this.exists(path);
|
||||
|
||||
if(permissions){
|
||||
var checkPerms = this.validatePermissions(permissions);
|
||||
|
||||
if(!checkPerms){
|
||||
dump("**** Sorry invalid permissions set\n\n");
|
||||
return;
|
||||
}
|
||||
|
||||
var baseTen = permissions.toString(10);
|
||||
|
||||
if(baseTen.substring(0,1) != 0)
|
||||
permissions = 0+baseTen;
|
||||
|
||||
}
|
||||
|
||||
|
||||
try{
|
||||
|
||||
this.fileInst = new FilePath(path);
|
||||
|
||||
if (!fileExists){
|
||||
|
||||
if(!permissions)
|
||||
permissions = 0755;
|
||||
dump("\n\nCreating new Directory \""+path+"\"\n\n");
|
||||
this.fileInst.create( 1, parseInt(permissions) ); //*NOTE* permission 0777 doesn't seem to work here -pete
|
||||
|
||||
}
|
||||
|
||||
else{ dump("Sorry Directory "+path+" already exists\n\n"); }
|
||||
|
||||
|
||||
}
|
||||
|
||||
catch (error){ dump("**** ERROR:"+error+"\n\n"); }
|
||||
|
||||
this.close();
|
||||
|
||||
},
|
||||
|
||||
/********************* MKDIR ****************************/
|
||||
|
||||
/********************* APPEND ***************************/
|
||||
|
||||
append : function (dirPath, fileName) {
|
||||
|
||||
if(!dirPath || !fileName){
|
||||
dump("Missing path argument . . . \n\n");
|
||||
return;
|
||||
}
|
||||
|
||||
dump("\n\n**** Checking to see if the directory exists "+fileName+"****\n\n");
|
||||
this.exists(dirPath);
|
||||
|
||||
try{
|
||||
|
||||
//if(!this.fileInst)
|
||||
this.fileInst = new FilePath(dirPath);
|
||||
|
||||
fileAppended = this.fileInst.append(fileName);
|
||||
fileAppended = this.fileInst.path;
|
||||
|
||||
}
|
||||
|
||||
catch(error) { dump("**** ERROR:"+error+"\n\n"); }
|
||||
|
||||
dump("File \""+dirPath+"\" appended = "+fileAppended+"\n\n");
|
||||
|
||||
return fileAppended;
|
||||
},
|
||||
|
||||
/********************* APPEND ***************************/
|
||||
|
||||
/********************* VALIDATE PERMISSIONS *************/
|
||||
|
||||
validatePermissions : function(num){
|
||||
|
||||
dump("Checking for valid permission\n\n");
|
||||
|
||||
if ( parseInt(num.toString(10).length) < 3 )
|
||||
return false;
|
||||
|
||||
return true;
|
||||
|
||||
},
|
||||
|
||||
/********************* VALIDATE PERMISSIONS *************/
|
||||
|
||||
/********************* CLOSE ****************************/
|
||||
|
||||
close : function(){
|
||||
|
||||
/***************** Destroy Instances *********************/
|
||||
|
||||
dump("**** destroying any object instances ****\n\n");
|
||||
|
||||
if(this.fileInst) delete this.fileInst;
|
||||
if(this.fileChannel) delete this.fileChannel;
|
||||
if(this.inputStream) delete this.inputStream;
|
||||
if(this.mode) this.mode=null;
|
||||
|
||||
/***************** Destroy Instances *********************/
|
||||
|
||||
|
||||
}
|
||||
|
||||
/********************* CLOSE ****************************/
|
||||
|
||||
};
|
||||
|
||||
////////////////// End File Object Class /////////////////////
|
||||
|
||||
|
||||
/************** Create an instance of file object *************/
|
||||
|
||||
//file = new File(); // commenting out for now, the user can initialize the object . . .
|
||||
|
||||
/************** Create an instance of file object *************/
|
||||
|
||||
|
||||
|
||||
Загрузка…
Ссылка в новой задаче