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NNTPConnection.m
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NNTPConnection.m
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//
// NNTPConnection.m
// FTPConnection
//
// Created by Greg Hulands on 6/12/05.
// Copyright 2005 __MyCompanyName__. All rights reserved.
//
#import "NNTPConnection.h"
NSString *NNTPErrorDomain = @"NNTPErrorDomain";
NSString *NNTPFirstMessageKey = @"NNTPFirstMessageKey";
NSString *NNTPLastMessageKey = @"NNTPLastMessageKey";
NSString *NNTPCanPostToGroupKey = @"NNTPCanPostToGroupKey";
@interface NSFileManager (NNTPGroupParsing)
+ (NSArray *)attributedNewsGroupsFromListing:(NSString *)listing;
@end
@interface NNTPConnection (Private)
- (void)parseCommand:(NSString *)command;
- (void)receiveNewsGroupsListing;
@end
@implementation NNTPConnection
+ (void)load // registration of this class
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSDictionary *port = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:119], ACTypeValueKey, ACPortTypeKey, ACTypeKey, nil];
NSDictionary *url = [NSDictionary dictionaryWithObjectsAndKeys:@"news://", ACTypeValueKey, ACURLTypeKey, ACTypeKey, nil];
NSDictionary *url2 = [NSDictionary dictionaryWithObjectsAndKeys:@"usenet://", ACTypeValueKey, ACURLTypeKey, ACTypeKey, nil];
NSDictionary *url3 = [NSDictionary dictionaryWithObjectsAndKeys:@"nntp://", ACTypeValueKey, ACURLTypeKey, ACTypeKey, nil];
[CKAbstractConnection registerConnectionClass:[NNTPConnection class] forTypes:[NSArray arrayWithObjects:port, url, url2, url3, nil]];
[pool release];
}
+ (NSInteger)defaultPort { return 119; }
+ (NSString *)name
{
return @"NNTP";
}
+ (NSArray *)URLSchemes
{
return [NSArray arrayWithObjects:@"nntp", @"usenet", @"news"];
}
- (id)initWithURL:(NSURL *)URL
{
if (self = [super initWithURL:URL]) {
_inputBuffer = [[NSMutableString alloc] init];
_newsflags.isSlave = NO;
}
return self;
}
- (void)dealloc
{
[_inputBuffer release];
[_currentNewsGroup release];
[super dealloc];
}
- (void)processReceivedData:(NSData *)data
{
NSRange newLinePosition;
NSString *str = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
[_inputBuffer appendString:str];
while ((newLinePosition=[_inputBuffer rangeOfString:@"\r\n"]).location != NSNotFound ||
(newLinePosition=[_inputBuffer rangeOfString:@"\n"]).location != NSNotFound)
{
NSString *cmd = [_inputBuffer substringToIndex:newLinePosition.location];
[_inputBuffer deleteCharactersInRange:NSMakeRange(0,newLinePosition.location+newLinePosition.length)]; // delete the parsed part
[self parseCommand:cmd]; // parse first line of the buffer
}
}
- (void)sendCommand:(NSString *)cmd
{
KTLog(CKProtocolDomain, KTLogDebug, @">> %@", cmd);
NSString *formattedCommand = [NSString stringWithFormat:@"%@\r\n", cmd];
[self appendToTranscript:[[[NSAttributedString alloc] initWithString:formattedCommand
attributes:[CKAbstractConnection sentAttributes]] autorelease]];
[self sendData:[formattedCommand dataUsingEncoding:NSUTF8StringEncoding]];
}
#pragma mark -
#pragma mark State Machine
- (void)parseCommand:(NSString *)command
{
NSScanner *scanner = [NSScanner scannerWithString:command];
int code;
[scanner scanInt:&code];
[self appendToTranscript:[[[NSAttributedString alloc] initWithString:[NSString stringWithFormat:@"%@\n", command]
attributes:[CKAbstractConnection receivedAttributes]] autorelease]];
KTLog(CKProtocolDomain, KTLogDebug, @"<<# %@", command); /// use <<# to help find commands
switch (code) {
#pragma mark -
#pragma mark 100 Series Codes
case 100: {
} break;
case 199: {
} break;
#pragma mark -
#pragma mark 200 Series Codes
case 200: {
if (GET_STATE == CKConnectionNotConnectedState) {
_newsflags.canPost = YES;
if (_flags.didConnect)
[_forwarder connection:self didConnectToHost:[self host]];
[self setState:CKConnectionIdleState];
}
} break;
case 201: {
if (GET_STATE == CKConnectionNotConnectedState) {
_newsflags.canPost = NO;
if (_flags.didConnect)
[_forwarder connection:self didConnectToHost:[self host]];
[self setState:CKConnectionIdleState];
}
} break;
case 202: {
if (GET_STATE == CKConnectionNotConnectedState) {
_newsflags.isSlave = YES;
if (_flags.didConnect)
[_forwarder connection:self didConnectToHost:[self host]];
[self setState:CKConnectionIdleState];
}
} break;
case 205: {
if (_flags.didDisconnect)
[_forwarder connection:self didDisconnectFromHost:[self host]];
[self setState:CKConnectionNotConnectedState];
} break;
case 211: {
} break;
case 215: {
if (GET_STATE == CKConnectionAwaitingDirectoryContentsState) {
[self receiveNewsGroupsListing];
[self setState:CKConnectionIdleState];
}
} break;
case 220: {
} break;
case 222: {
} break;
case 223: {
if (GET_STATE == CKConnectionAwaitingDirectoryContentsState) {
[self receiveNewsGroupsListing];
[self setState:CKConnectionIdleState];
}
} break;
case 231: {
} break;
case 235: {
} break;
case 240: {
} break;
#pragma mark -
#pragma mark 300 Series Codes
case 335: {
} break;
case 340: {
} break;
#pragma mark -
#pragma mark 400 Series Codes
case 400: {
} break;
case 411: {
} break;
case 412: {
} break;
case 420: {
} break;
case 421: {
} break;
case 422: {
} break;
case 423: {
} break;
case 430: {
} break;
case 435: {
} break;
case 436: {
} break;
case 437: {
} break;
case 440: {
} break;
case 441: {
} break;
#pragma mark -
#pragma mark 500 Series Codes
case 500: {
} break;
case 501: {
} break;
case 502: {
if (GET_STATE == CKConnectionNotConnectedState) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:502
userInfo:nil];
if (_flags.error)
[_forwarder connection:self didReceiveError:err];
}
} break;
case 503: {
} break;
}
}
- (void)changeToDirectory:(NSString *)dirPath
{
[self queueCommand:[ConnectionCommand command:[NSString stringWithFormat:@"GROUP %@", dirPath]
awaitState:CKConnectionIdleState
sentState:CKConnectionChangedDirectoryState
dependant:nil
userInfo:nil]];
}
- (NSString *)currentDirectory
{
return _currentNewsGroup;
}
- (NSString *)rootDirectory
{
return @"";
}
- (void)createDirectory:(NSString *)dirPath
{
}
- (void)createDirectory:(NSString *)dirPath permissions:(unsigned long)permissions
{
}
- (void)setPermissions:(unsigned long)permissions forFile:(NSString *)path
{
if (_flags.error) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:500
userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New server does not implement %@", NSStringFromSelector(_cmd)]
forKey:NSLocalizedDescriptionKey]];
[_forwarder connection:self didReceiveError:err];
}
}
- (void)rename:(NSString *)fromPath to:(NSString *)toPath
{
if (_flags.error) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:500
userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New server does not implement %@", NSStringFromSelector(_cmd)]
forKey:NSLocalizedDescriptionKey]];
[_forwarder connection:self didReceiveError:err];
}
}
- (void)deleteFile:(NSString *)path
{
if (_flags.error) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:500
userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New server does not implement %@", NSStringFromSelector(_cmd)]
forKey:NSLocalizedDescriptionKey]];
[_forwarder connection:self didReceiveError:err];
}
}
- (void)deleteDirectory:(NSString *)dirPath
{
NSAssert(dirPath && ![dirPath isEqualToString:@""], @"dirPath is nil!");
if (_flags.error) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:500
userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New server does not implement %@", NSStringFromSelector(_cmd)]
forKey:NSLocalizedDescriptionKey]];
[_forwarder connection:self didReceiveError:err];
}
}
- (void)uploadFile:(NSString *)localPath toFile:(NSString *)remotePath
{
if (_flags.error) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:500
userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New server does not implement %@", NSStringFromSelector(_cmd)]
forKey:NSLocalizedDescriptionKey]];
[_forwarder connection:self didReceiveError:err];
}
}
- (void)resumeUploadFile:(NSString *)localPath fileOffset:(unsigned long long)offset
{
if (_flags.error) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:500
userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New server does not implement %@", NSStringFromSelector(_cmd)]
forKey:NSLocalizedDescriptionKey]];
[_forwarder connection:self didReceiveError:err];
}
}
- (void)resumeUploadFile:(NSString *)localPath toFile:(NSString *)remotePath fileOffset:(unsigned long long)offset
{
if (_flags.error) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:500
userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New server does not implement %@", NSStringFromSelector(_cmd)]
forKey:NSLocalizedDescriptionKey]];
[_forwarder connection:self didReceiveError:err];
}
}
- (void)uploadFromData:(NSData *)data toFile:(NSString *)remotePath
{
if (_flags.error) {
NSError *err = [NSError errorWithDomain:NNTPErrorDomain
code:500
userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New server does not implement %@", NSStringFromSelector(_cmd)]
forKey:NSLocalizedDescriptionKey]];
[_forwarder connection:self didReceiveError:err];
}
}
- (void)downloadFile:(NSString *)remotePath toDirectory:(NSString *)dirPath overwrite:(BOOL)flag
{
}
- (void)resumeDownloadFile:(NSString *)remotePath toDirectory:(NSString *)dirPath fileOffset:(unsigned long long)offset
{
[self downloadFile:remotePath toDirectory:dirPath overwrite:YES];
}
- (void)cancelTransfer
{
}
- (void)cancelAll
{
}
- (void)directoryContents
{
[self queueCommand:[ConnectionCommand command:@"LIST -a"
awaitState:CKConnectionIdleState
sentState:CKConnectionAwaitingDirectoryContentsState
dependant:nil
userInfo:nil]];
}
- (void)contentsOfDirectory:(NSString *)dirPath
{
NSAssert(dirPath && ![dirPath isEqualToString:@""], @"no dirPath");
[self queueCommand:[ConnectionCommand command:@"LIST -a"
awaitState:CKConnectionIdleState
sentState:CKConnectionAwaitingDirectoryContentsState
dependant:nil
userInfo:nil]];
}
#pragma mark -
#pragma mark Helper Utilities
- (void)receiveNewsGroupsListing
{
//consume everything the dot (.)
BOOL atEnd = NO;
NSMutableString *groupsListing = [NSMutableString string];
NSRange newLinePosition;
NSAutoreleasePool *pool;
long groupCount = 0;
NSMutableString *tempGroups = [NSMutableString string];
while (atEnd == NO) {
pool = [[NSAutoreleasePool alloc] init];
NSData *data = [self availableData];
NSString *str = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
[_inputBuffer appendString:str];
[str release];
while ((newLinePosition=[_inputBuffer rangeOfString:@"\r\n"]).location != NSNotFound ||
(newLinePosition=[_inputBuffer rangeOfString:@"\n"]).location != NSNotFound)
{
NSString *line = [_inputBuffer substringToIndex:newLinePosition.location + newLinePosition.length];
[_inputBuffer deleteCharactersInRange:NSMakeRange(0,newLinePosition.location+newLinePosition.length)]; // delete the parsed part
[self appendToTranscript:[[[NSAttributedString alloc] initWithString:[NSString stringWithFormat:@"%@", line]
attributes:[CKAbstractConnection dataAttributes]] autorelease]];
KTLog(CKProtocolDomain, KTLogError, @"%@", line);
if ([line rangeOfString:@"."].location == 0)
atEnd = YES;
else {
[tempGroups appendString:line];
[groupsListing appendString:line];
}
if (groupCount % 500 == 1) {
if (_flags.directoryContentsStreamed)
[_forwarder connection:self
didReceiveContents:[NSFileManager attributedNewsGroupsFromListing:tempGroups]
ofDirectory:@""
moreComing:YES];
[tempGroups deleteCharactersInRange:NSMakeRange(0,[tempGroups length])];
}
groupCount++;
}
[pool release];
}
//complete the streaming before the complete directory contents
if (_flags.directoryContentsStreamed)
[_forwarder connection:self
didReceiveContents:[NSFileManager attributedNewsGroupsFromListing:tempGroups]
ofDirectory:@""
moreComing:NO];
if (_flags.directoryContents)
[_forwarder connection:self
didReceiveContents:[NSFileManager attributedNewsGroupsFromListing:groupsListing]
ofDirectory:@""];
}
@end
@implementation NSFileManager (NNTPGroupParsing)
+ (NSArray *)attributedNewsGroupsFromListing:(NSString *)line
{
NSMutableArray *groups = [NSMutableArray array];
NSArray *lines;
NSRange rn = [line rangeOfString:@"\r\n"];
if (rn.location == NSNotFound)
{
rn = [line rangeOfString:@"\n"];
if (rn.location == NSNotFound)
{
NSError *error = [NSError errorWithDomain:ConnectionErrorDomain
code:CKConnectionErrorParsingDirectoryListing
userInfo:[NSDictionary dictionaryWithObject:@"Error parsing directory listing" forKey:NSLocalizedDescriptionKey]];
KTLog(ParsingDomain, KTLogError, @"Could not determine line endings, try refreshing directory");
@throw error;
return nil;
}
else
lines = [line componentsSeparatedByString:@"\n"];
}
else
lines = [line componentsSeparatedByString:@"\r\n"];
NSEnumerator *e = [lines objectEnumerator];
NSString *cur;
while (cur = [e nextObject]) {
NSArray *bits = [cur componentsSeparatedByString:@" "];
if ([bits count] != 4) continue;
NSString *group = [bits objectAtIndex:0];
NSString *last = [bits objectAtIndex:1];
NSString *first = [bits objectAtIndex:2];
NSString *canPost = [bits objectAtIndex:3];
BOOL cp = [[canPost lowercaseString] isEqualToString:@"y"];
long long l, f;
NSScanner *scanner = [NSScanner scannerWithString:last];
[scanner scanLongLong:&l];
scanner = [NSScanner scannerWithString:first];
[scanner scanLongLong:&f];
NSMutableDictionary *attribs = [NSMutableDictionary dictionary];
[attribs setObject:NSFileTypeDirectory forKey:NSFileType];
[attribs setObject:group forKey:cxFilenameKey];
[attribs setObject:[NSNumber numberWithLongLong:l] forKey:NNTPLastMessageKey];
[attribs setObject:[NSNumber numberWithLongLong:f] forKey:NNTPFirstMessageKey];
[attribs setObject:[NSNumber numberWithLongLong:abs(l-f)] forKey:NSFileSize];
[attribs setObject:[NSNumber numberWithBool:cp] forKey:NNTPCanPostToGroupKey];
[groups addObject:attribs];
}
return groups;
}
@end