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GSFTPURLHandle.m
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/** GSFTPURLHandle.m - Class GSFTPURLHandle
Copyright (C) 2002 Free Software Foundation, Inc.
Written by: Richard Frith-Macdonald <rfm@gnu.org>
Date: June 2002
This file is part of the GNUstep Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 31 Milk Street #960789 Boston, MA 02196 USA.
*/
#import "common.h"
#import "Foundation/NSArray.h"
#import "Foundation/NSDictionary.h"
#import "Foundation/NSEnumerator.h"
#import "Foundation/NSException.h"
#import "Foundation/NSValue.h"
#import "Foundation/NSData.h"
#import "Foundation/NSDictionary.h"
#import "Foundation/NSEnumerator.h"
#import "Foundation/NSURL.h"
#import "Foundation/NSURLHandle.h"
#import "Foundation/NSNotification.h"
#import "Foundation/NSRunLoop.h"
#import "Foundation/NSByteOrder.h"
#import "Foundation/NSLock.h"
#import "Foundation/NSFileHandle.h"
#import "GNUstepBase/GSMime.h"
#import "GSPrivate.h"
GS_EXPORT NSString * const GSTelnetNotification;
GS_EXPORT NSString * const GSTelnetErrorKey;
GS_EXPORT NSString * const GSTelnetTextKey;
@interface GSTelnetHandle : NSObject
{
NSStringEncoding enc;
NSFileHandle *remote;
NSMutableData *ibuf;
unsigned pos;
BOOL lineMode;
BOOL connected;
}
- (id) initWithHandle: (NSFileHandle*)handle isConnected: (BOOL)flag;
- (void) putTelnetLine: (NSString*)s;
- (void) putTelnetText: (NSString*)s;
- (void) setEncoding: (NSStringEncoding)e;
- (void) setLineMode: (BOOL)flag;
@end
@interface GSTelnetHandle (Private)
- (void) _didConnect: (NSNotification*)notification;
- (void) _didRead: (NSNotification*)notification;
- (void) _didWrite: (NSNotification*)notification;
@end
NSString * const GSTelnetNotification = @"GSTelnetNotification";
NSString * const GSTelnetErrorKey = @"GSTelnetErrorKey";
NSString * const GSTelnetTextKey = @"GSTelnetTextKey";
@implementation GSTelnetHandle
#define WILL 251
#define WONT 252
#define DO 253
#define DONT 254
#define IAC 255
- (void) dealloc
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc removeObserver: self];
RELEASE(remote);
RELEASE(ibuf);
[super dealloc];
}
- (id) init
{
return [self initWithHandle: nil isConnected: NO];
}
- (id) initWithHandle: (NSFileHandle*)handle isConnected: (BOOL)flag
{
if (handle == nil)
{
DESTROY(self);
}
else
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
connected = flag;
enc = NSUTF8StringEncoding;
ibuf = [NSMutableData new];
remote = RETAIN(handle);
if (connected == YES)
{
[nc addObserver: self
selector: @selector(_didRead:)
name: NSFileHandleReadCompletionNotification
object: remote];
[nc addObserver: self
selector: @selector(_didWrite:)
name: GSFileHandleWriteCompletionNotification
object: remote];
[remote readInBackgroundAndNotify];
}
else
{
[nc addObserver: self
selector: @selector(_didConnect:)
name: GSFileHandleConnectCompletionNotification
object: remote];
}
}
return self;
}
- (void) putTelnetLine: (NSString*)s
{
if ([s hasSuffix: @"\n"] == NO)
{
s = [s stringByAppendingString: @"\r\n"];
}
[self putTelnetText: s];
}
- (void) putTelnetText: (NSString*)s
{
NSMutableData *md;
unsigned char *to;
NSData *d = [s dataUsingEncoding: enc];
unsigned char *from = (unsigned char *)[d bytes];
unsigned int len = [d length];
unsigned int i = 0;
unsigned int count = 0;
for (i = 0; i < len; i++)
{
if (from[i] == IAC)
{
count++;
}
}
md = [[NSMutableData alloc] initWithLength: len + count];
to = [md mutableBytes];
for (i = 0; i < len; i++)
{
if (*from == IAC)
{
*to++ = IAC;
}
*to++ = *from++;
}
//NSLog(@"Write - '%*.*s'", [md length], [md length], [md bytes]);
[remote writeInBackgroundAndNotify: md];
DESTROY(md);
}
/**
* Set the string encoding used to convert strings to be sent to the
* remote system into raw data, and to convert incoming data from that
* system inot input text.
*/
- (void) setEncoding: (NSStringEncoding)e
{
enc = e;
}
/**
* Sets a flag to say whether observers are to be notified of incoming
* data after every chunk read, or only when one or more entire lines
* are read. <br />
* When switching out of line mode, this will cause a notification to be
* generated if there is any buffered data available for use.
*/
- (void) setLineMode: (BOOL)flag
{
if (lineMode != flag)
{
lineMode = flag;
if (lineMode == NO)
{
[self _didRead: nil];
}
}
}
@end
@implementation GSTelnetHandle (Private)
- (void) _didConnect: (NSNotification*)notification
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
NSDictionary *info = [notification userInfo];
NSString *e;
e = [info objectForKey: GSFileHandleNotificationError];
if (e == nil)
{
[nc removeObserver: self
name: GSFileHandleConnectCompletionNotification
object: [notification object]];
[nc addObserver: self
selector: @selector(_didRead:)
name: NSFileHandleReadCompletionNotification
object: remote];
[nc addObserver: self
selector: @selector(_didWrite:)
name: GSFileHandleWriteCompletionNotification
object: remote];
[remote readInBackgroundAndNotify];
}
else
{
info = [NSDictionary dictionaryWithObject: e
forKey: GSTelnetErrorKey];
[nc postNotificationName: GSTelnetNotification
object: self
userInfo: info];
}
}
- (void) _didRead: (NSNotification*)notification
{
NSDictionary *userInfo = [notification userInfo];
NSMutableArray *text = nil;
NSData *d;
d = [userInfo objectForKey: NSFileHandleNotificationDataItem];
/*
* If the notification is nil, this method has been called to flush
* any buffered data out.
*/
if (notification != nil && (d == nil || [d length] == 0))
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
NSDictionary *info;
info = [NSDictionary dictionaryWithObject: @"EOF"
forKey: GSTelnetErrorKey];
[nc postNotificationName: GSTelnetNotification
object: self
userInfo: info];
}
else
{
NSMutableData *toWrite = nil;
unsigned char *ptr;
unsigned char c;
unsigned int s = 0;
int old;
int len;
int i; // May be negative.
if (d != nil)
{
// NSLog(@"Read - '%@'", d);
[ibuf appendData: d];
}
old = len = (int)[ibuf length];
ptr = [ibuf mutableBytes];
for (i = pos; i < len; i++)
{
NSData *line = nil;
c = ptr[i];
if (c == IAC)
{
if (i < len - 1)
{
c = ptr[i+1];
if (c == WILL || c == WONT || c == DO || c == DONT)
{
/*
* refuse any negotiation attempts.
*/
if (c == WILL || c == DO)
{
unsigned char opt[3];
if (toWrite == nil)
{
toWrite = [NSMutableData alloc];
toWrite = [toWrite initWithCapacity: 12];
}
opt[0] = IAC;
if (c == DO)
{
opt[1] = WONT;
}
else
{
opt[1] = DONT;
}
opt[2] = ptr[i+2];
[toWrite appendBytes: opt length: 3];
}
if (i < len - 2)
{
// NSLog(@"Command: %d %d", ptr[1], ptr[2]);
len -= 3;
if (len - i > 0)
{
memmove(ptr, &ptr[3], len - i);
}
i--; // Try again.
}
else
{
i--;
break; // Need more data
}
}
else if (c == IAC) // Escaped IAC
{
len--;
if (len - i > 0)
{
memmove(ptr, &ptr[1], len - i);
}
}
else
{
// NSLog(@"Command: %d", ptr[1]);
/*
* Strip unimplemented escape sequence.
*/
len -= 2;
if (len - i > 0)
{
memmove(ptr, &ptr[2], len - i);
}
i--; // Try again from here.
}
}
else
{
i--;
break; // Need more data
}
}
else if (c == '\r' && (int)i < len - 1 && ptr[i+1] == '\n')
{
line = [[NSData alloc] initWithBytes: &ptr[s] length: i-s+2];
i++;
s = i + 1;
}
else if (c == '\n')
{
line = [[NSData alloc] initWithBytes: &ptr[s] length: i-s+1];
s = i + 1;
}
if (line != nil)
{
NSString *lineString;
lineString = [[NSString alloc] initWithData: line encoding: enc];
DESTROY(line);
if (text == nil)
{
text = [[NSMutableArray alloc] initWithCapacity: 4];
}
[text addObject: lineString];
DESTROY(lineString);
}
}
pos = i;
/*
* If not in line mode, we can add the remainder of the data to
* the array of strings for notification.
*/
if (lineMode == NO && s != pos)
{
NSString *lineString;
NSData *line;
line = [[NSData alloc] initWithBytes: &ptr[s] length: pos - s];
s = pos;
lineString = [[NSString alloc] initWithData: line encoding: enc];
DESTROY(line);
if (text == nil)
{
text = [[NSMutableArray alloc] initWithCapacity: 4];
}
[text addObject: lineString];
DESTROY(lineString);
}
/*
* Adjust size of data remaining in buffer if necessary.
*/
if (old != len || s > 0)
{
if (s > 0)
{
len -= s;
pos -= s;
if (len > 0)
{
memmove(ptr, &ptr[s], len);
}
}
[ibuf setLength: len];
}
/*
* Send telnet protocol negotion info if necessary.
*/
if (toWrite != nil)
{
// NSLog(@"Write - '%@'", toWrite);
[remote writeInBackgroundAndNotify: toWrite];
DESTROY(toWrite);
}
/*
* Send notification for text read as necessary.
*/
if (text != nil)
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
NSNotification *n;
NSDictionary *info;
info = [NSDictionary dictionaryWithObject: text
forKey: GSTelnetTextKey];
DESTROY(text);
n = [NSNotification notificationWithName: GSTelnetNotification
object: self
userInfo: info];
[nc postNotification: n];
}
[remote readInBackgroundAndNotify];
}
}
- (void) _didWrite: (NSNotification*)notification
{
NSDictionary *userInfo = [notification userInfo];
NSString *e;
e = [userInfo objectForKey: GSFileHandleNotificationError];
if (e)
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
NSDictionary *info;
info = [NSDictionary dictionaryWithObject: e
forKey: GSTelnetErrorKey];
[nc postNotificationName: GSTelnetNotification
object: self
userInfo: info];
}
}
@end
@interface GSFTPURLHandle : NSURLHandle
{
GSTelnetHandle *cHandle;
NSFileHandle *dHandle;
NSURL *url;
NSData *wData;
NSString *term;
enum {
idle,
cConnect, // Establishing control connection
sentUser, // Sent username
sentPass, // Sent password
sentType, // Sent data type
sentPasv, // Requesting host/port information for data link
data, // Establishing or using data connection
list, // listing directory
} state;
}
- (void) _control: (NSNotification*)n;
- (void) _data: (NSNotification*)n;
@end
/**
* <p>
* This is a <em>PRIVATE</em> subclass of NSURLHandle.
* It is documented here in order to give you information about the
* default behavior of an NSURLHandle created to deal with a URL
* that has the <code>ftp</code> scheme.
* The name and/or other implementation details of this class
* may be changed at any time.
* </p>
* <p>
* A GSFTPURLHandle instance is used to manage connections to
* <code>ftp</code> URLs.
* </p>
*/
@implementation GSFTPURLHandle
static NSMutableDictionary *urlCache = nil;
static NSLock *urlLock = nil;
+ (NSURLHandle*) cachedHandleForURL: (NSURL*)newUrl
{
NSURLHandle *obj = nil;
if ([[newUrl scheme] caseInsensitiveCompare: @"ftp"] == NSOrderedSame)
{
NSString *page = [newUrl absoluteString];
// NSLog(@"Lookup for handle for '%@'", page);
[urlLock lock];
obj = [urlCache objectForKey: page];
IF_NO_ARC([[obj retain] autorelease];)
[urlLock unlock];
// NSLog(@"Found handle %@", obj);
}
return obj;
}
+ (void) initialize
{
if (self == [GSFTPURLHandle class])
{
urlCache = [NSMutableDictionary new];
[[NSObject leakAt: &urlCache] release];
urlLock = [NSLock new];
[[NSObject leakAt: &urlLock] release];
}
}
- (void) dealloc
{
if (state != idle)
{
[self endLoadInBackground];
}
RELEASE(url);
RELEASE(wData);
RELEASE(term);
[super dealloc];
}
- (id) initWithURL: (NSURL*)newUrl
cached: (BOOL)cached
{
if ((self = [super initWithURL: newUrl cached: cached]) != nil)
{
ASSIGN(url, newUrl);
state = idle;
if (cached == YES)
{
NSString *page = [newUrl absoluteString];
[urlLock lock];
[urlCache setObject: self forKey: page];
[urlLock unlock];
// NSLog(@"Cache handle %@ for '%@'", self, page);
}
}
return self;
}
+ (BOOL) canInitWithURL: (NSURL*)newUrl
{
if ([[newUrl scheme] isEqualToString: @"ftp"] == YES)
{
return YES;
}
return NO;
}
- (void) _control: (NSNotification*)n
{
NSDictionary *info = [n userInfo];
NSString *e = [info objectForKey: GSTelnetErrorKey];
NSArray *text;
NSString *line;
if (e == nil)
{
NSEnumerator *enumerator;
text = [info objectForKey: GSTelnetTextKey];
// NSLog(@"Ctl: %@", text);
/* Find first reply line which is not a continuation of another.
*/
enumerator = [text objectEnumerator];
while ((line = [enumerator nextObject]) != nil)
{
if (term == nil)
{
if ([line length] > 4)
{
char buf[4];
buf[0] = (char)[line characterAtIndex: 0];
buf[1] = (char)[line characterAtIndex: 1];
buf[2] = (char)[line characterAtIndex: 2];
buf[3] = (char)[line characterAtIndex: 3];
if (isdigit(buf[0]) && isdigit(buf[1]) && isdigit(buf[2]))
{
if (buf[3] == '-')
{
/* Got start of a multiline block ...
* set the terminator we need to look for.
*/
buf[3] = ' ';
term = [[NSString alloc]
initWithCString: buf length: 4];
}
else if (buf[3] == ' ')
{
/* Found single line response.
*/
break;
}
}
}
}
else if ([line hasPrefix: term] == YES)
{
/* Found end of a multiline response.
*/
DESTROY(term);
break;
}
}
if (line == nil)
{
return;
}
if (state == cConnect)
{
if ([line hasPrefix: @"2"] == YES)
{
NSString *user = [url user];
if (user == nil)
{
user = @"anonymous";
}
[cHandle putTelnetLine: [@"USER " stringByAppendingString: user]];
state = sentUser;
}
else
{
e = line;
}
}
else if (state == sentUser)
{
if ([line hasPrefix: @"230"] == YES) // No password required
{
[cHandle putTelnetLine: @"TYPE I"];
state = sentType;
}
else if ([line hasPrefix: @"331"] == YES)
{
NSString *pass = [url password];
if (pass == nil)
{
pass = [url user];
if (pass == nil)
{
pass = @"GNUstep@here";
}
else
{
pass = @"";
}
}
[cHandle putTelnetLine: [@"PASS " stringByAppendingString: pass]];
state = sentPass;
}
else
{
e = line;
}
}
else if (state == sentPass)
{
if ([line hasPrefix: @"2"] == YES)
{
[cHandle putTelnetLine: @"TYPE I"];
state = sentType;
}
else
{
e = line;
}
}
else if (state == sentType)
{
if ([line hasPrefix: @"2"] == YES)
{
[cHandle putTelnetLine: @"PASV"];
state = sentPasv;
}
else
{
e = line;
}
}
else if (state == sentPasv)
{
if ([line hasPrefix: @"227"] == YES)
{
NSRange r = [line rangeOfString: @"("];
NSString *h = nil;
NSString *p = nil;
if (r.length > 0)
{
unsigned pos = NSMaxRange(r);
r = [line rangeOfString: @")"];
if (r.length > 0 && r.location > pos)
{
NSArray *a;
r = NSMakeRange(pos, r.location - pos);
line = [line substringWithRange: r];
a = [line componentsSeparatedByString: @","];
if ([a count] == 6)
{
h = [NSString stringWithFormat: @"%@.%@.%@.%@",
[a objectAtIndex: 0], [a objectAtIndex: 1],
[a objectAtIndex: 2], [a objectAtIndex: 3]];
p = [NSString stringWithFormat: @"%d",
[[a objectAtIndex: 4] intValue] * 256
+ [[a objectAtIndex: 5] intValue]];
}
}
}
if (h == nil)
{
e = @"Invalid host/port information for pasv command";
}
else
{
NSNotificationCenter *nc;
dHandle = [NSFileHandle
fileHandleAsClientInBackgroundAtAddress: h service: p
protocol: @"tcp"];
IF_NO_ARC([dHandle retain];)
nc = [NSNotificationCenter defaultCenter];
[nc addObserver: self
selector: @selector(_data:)
name: GSFileHandleConnectCompletionNotification
object: dHandle];
state = data;
}
}
else
{
e = line;
}
}
else if (state == data)
{
if ([line hasPrefix: @"550"] == YES && wData == nil)
{
state = list;
[cHandle putTelnetLine:
[NSString stringWithFormat: @"NLST %@", [url path]]];
}
else if ([line hasPrefix: @"1"] == NO && [line hasPrefix: @"2"] == NO)
{
e = line;
}
}
else if (state == list)
{
if ([line hasPrefix: @"550"] == YES)
{
NSRange r = [line rangeOfString: @"not a plain file"];
/*
* Some servers may return an error on listing even though
* the path was a valid directory. We try to catch some of
* those cases and produce an empty listing instead.
*/
if (r.location > 0)
{
NSNotificationCenter *nc;
nc = [NSNotificationCenter defaultCenter];
if (dHandle != nil)
{
[nc removeObserver: self name: nil object: dHandle];
[dHandle closeFile];
DESTROY(dHandle);
}
[nc removeObserver: self
name: GSTelnetNotification
object: cHandle];
DESTROY(cHandle);
state = idle;
[self didLoadBytes: [NSData data] loadComplete: YES];
}
else
{
e = line;
}
}
else if ([line hasPrefix: @"1"] == NO && [line hasPrefix: @"2"] == NO)
{
e = line;
}
}
else
{
e = @"Message in unknown state";
}
}
if (e != nil)
{
/*
* Tell superclass that the load failed - let it do housekeeping.
*/
[self endLoadInBackground];
[self backgroundLoadDidFailWithReason: e];
}
}
- (void) _data: (NSNotification*)n
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
NSString *name = [n name];
NSDictionary *info = [n userInfo];
NSString *e = [info objectForKey: GSFileHandleNotificationError];
// NSLog(@"_data: %@", n);
[nc removeObserver: self name: name object: dHandle];
/*
* See if the connection attempt caused an error.
*/
if (e != nil)
{
if ([name isEqualToString: GSFileHandleConnectCompletionNotification])
{
NSLog(@"Unable to connect to %@:%@ via socket ... %@",
[dHandle socketAddress], [dHandle socketService], e);
}
// NSLog(@"Fail - %@", e);
/*
* Tell superclass that the load failed - let it do housekeeping.
*/
[self endLoadInBackground];
[self backgroundLoadDidFailWithReason: e];
return;
}
if ([name isEqualToString: GSFileHandleConnectCompletionNotification])
{
if (wData == nil)
{
[cHandle putTelnetLine:
[NSString stringWithFormat: @"RETR %@", [url path]]];
[nc addObserver: self
selector: @selector(_data:)
name: NSFileHandleReadCompletionNotification
object: dHandle];
[dHandle readInBackgroundAndNotify];
}
else
{
[cHandle putTelnetLine:
[NSString stringWithFormat: @"STOR %@", [url path]]];
[nc addObserver: self
selector: @selector(_data:)
name: GSFileHandleWriteCompletionNotification
object: dHandle];
[dHandle writeInBackgroundAndNotify: wData];
}
}
else
{
if (wData == nil)
{
NSData *d;
d = [info objectForKey: NSFileHandleNotificationDataItem];
if ([d length] > 0)
{
[self didLoadBytes: d loadComplete: NO];
[nc addObserver: self
selector: @selector(_data:)
name: NSFileHandleReadCompletionNotification
object: dHandle];
[dHandle readInBackgroundAndNotify];
}
else
{
NSNotificationCenter *nc;
nc = [NSNotificationCenter defaultCenter];
if (dHandle != nil)
{
[nc removeObserver: self name: nil object: dHandle];
[dHandle closeFile];
DESTROY(dHandle);
}
[nc removeObserver: self
name: GSTelnetNotification
object: cHandle];
DESTROY(cHandle);
state = idle;
[self didLoadBytes: d loadComplete: YES];
}
}
else
{
NSNotificationCenter *nc;
NSData *tmp;
nc = [NSNotificationCenter defaultCenter];
if (dHandle != nil)
{
[nc removeObserver: self name: nil object: dHandle];
[dHandle closeFile];
DESTROY(dHandle);
}
[nc removeObserver: self
name: GSTelnetNotification
object: cHandle];
DESTROY(cHandle);
state = idle;
/*
* Tell superclass that we have successfully loaded the data.
*/
tmp = wData;
wData = nil;
[self didLoadBytes: tmp loadComplete: YES];
DESTROY(tmp);
}
}
}
- (void) endLoadInBackground
{
if (state != idle)
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
if (dHandle != nil)
{
[nc removeObserver: self name: nil object: dHandle];
[dHandle closeFile];
DESTROY(dHandle);
}
[nc removeObserver: self name: GSTelnetNotification object: cHandle];
DESTROY(cHandle);
state = idle;
}
[super endLoadInBackground];
}
- (void) loadInBackground
{
NSNotificationCenter *nc;
NSString *host = nil;
NSString *port = nil;
NSNumber *p;
NSFileHandle *sock;
/*
* Don't start a load if one is in progress.
*/
if (state != idle)
{
NSLog(@"Attempt to load an ftp handle which is not idle ... ignored");
return;
}
[self beginLoadInBackground];
host = [url host];
p = [url port];