jens@3: //
jens@3: //  BLIPEchoClient.m
jens@3: //  MYNetwork
jens@3: //
jens@3: //  Created by Jens Alfke on 5/24/08.
jens@3: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@4: //  Adapted from Apple sample code "CocoaEcho":
jens@4: //  http://developer.apple.com/samplecode/CocoaEcho/index.html
jens@3: //
jens@3: 
jens@3: #import "BLIPEchoClient.h"
jens@3: #import "BLIP.h"
jens@3: #import "IPAddress.h"
jens@3: #import "Target.h"
jens@3: 
jens@3: 
jens@3: @implementation BLIPEchoClient
jens@3: 
jens@3: @synthesize serviceList=_serviceList;
jens@3: 
jens@3: - (void)awakeFromNib 
jens@3: {
jens@3:     _serviceBrowser = [[NSNetServiceBrowser alloc] init];
jens@3:     _serviceList = [[NSMutableArray alloc] init];
jens@3:     [_serviceBrowser setDelegate:self];
jens@3:     
jens@3:     [_serviceBrowser searchForServicesOfType:@"_blipecho._tcp." inDomain:@""];
jens@3: }
jens@3: 
jens@3: #pragma mark -
jens@3: #pragma mark BLIPConnection support
jens@3: 
jens@4: /* Opens a BLIP connection to the given address. */
jens@3: - (void)openConnection: (IPAddress*)address 
jens@3: {
jens@3:     _connection = [[BLIPConnection alloc] initToAddress: address];
jens@3:     [_connection open];
jens@3: }
jens@3: 
jens@4: /* Closes the currently open BLIP connection. */
jens@3: - (void)closeConnection
jens@3: {
jens@3:     [_connection close];
jens@3:     [_connection release];
jens@3:     _connection = nil;
jens@3: }
jens@3: 
jens@3: #pragma mark -
jens@3: #pragma mark NSNetServiceBrowser delegate methods
jens@3: 
jens@3: // We broadcast the willChangeValueForKey: and didChangeValueForKey: for the NSTableView binding to work.
jens@3: 
jens@3: - (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)aNetService moreComing:(BOOL)moreComing {
jens@3:     if (![_serviceList containsObject:aNetService]) {
jens@3:         [self willChangeValueForKey:@"serviceList"];
jens@3:         [_serviceList addObject:aNetService];
jens@3:         [self didChangeValueForKey:@"serviceList"];
jens@3:     }
jens@3: }
jens@3: 
jens@3: - (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didRemoveService:(NSNetService *)aNetService moreComing:(BOOL)moreComing {
jens@3:     if ([_serviceList containsObject:aNetService]) {
jens@3:         [self willChangeValueForKey:@"serviceList"];
jens@3:         [_serviceList removeObject:aNetService];
jens@3:         [self didChangeValueForKey:@"serviceList"];
jens@3:     }
jens@3: }
jens@3: 
jens@3: #pragma mark -
jens@3: #pragma mark NSNetService delegate methods
jens@3: 
jens@4: /* Stop any current Bonjour address resolution */
jens@3: - (void)stopResolving
jens@3: {
jens@3:     if( _resolvingService ) {
jens@3:         _resolvingService.delegate = nil;
jens@3:         [_resolvingService stop];
jens@3:         [_resolvingService release];
jens@3:         _resolvingService = nil;
jens@3:     }
jens@3: }    
jens@3: 
jens@4: /* Ask Bonjour to resolve (look up) the IP address of the given service. */
jens@3: - (void)startResolving: (NSNetService*)service
jens@3: {
jens@3:     [self stopResolving];
jens@3:     _resolvingService = [service retain];
jens@3:     _resolvingService.delegate = self;
jens@3:     [_resolvingService resolveWithTimeout: 5.0];
jens@3:     
jens@3: }
jens@3: 
jens@4: /* NSNetService delegate method that will be called when address resolution finishes. */
jens@3: - (void)netServiceDidResolveAddress:(NSNetService *)sender
jens@3: {
jens@3:     if( sender == _resolvingService ) {
jens@4:         // Get the first address, which is an NSData containing a struct sockaddr:
jens@3:         NSArray *addresses = _resolvingService.addresses;
jens@3:         if( addresses.count > 0 ) {
jens@3:             NSData *addressData = [addresses objectAtIndex: 0];
jens@3:             IPAddress *address = [[IPAddress alloc] initWithSockAddr: addressData.bytes];
jens@3:             [self openConnection: address];
jens@3:             [address release];
jens@3:         }
jens@3:         [self stopResolving];
jens@3:     }
jens@3: }
jens@3: 
jens@3: #pragma mark -
jens@3: #pragma mark GUI action methods
jens@3: 
jens@3: - (IBAction)serverClicked:(id)sender {
jens@3:     NSTableView * table = (NSTableView *)sender;
jens@3:     int selectedRow = [table selectedRow];
jens@3:     
jens@3:     [self closeConnection];
jens@3:     [self stopResolving];
jens@3:     
jens@3:     if (-1 != selectedRow) {
jens@3:         [self startResolving: [_serviceList objectAtIndex:selectedRow]];
jens@3:     }
jens@3: }
jens@3: 
jens@4: /* Send a BLIP request containing the string in the textfield */
jens@3: - (IBAction)sendText:(id)sender 
jens@3: {
jens@3:     BLIPRequest *r = [_connection requestWithBody: nil];
jens@3:     r.bodyString = [sender stringValue];
jens@3:     BLIPResponse *response = [r send];
jens@3:     response.onComplete = $target(self,gotResponse:);
jens@3: }
jens@3: 
jens@4: /* Receive the response to the BLIP request, and put its contents into the response field */
jens@3: - (void) gotResponse: (BLIPResponse*)response
jens@3: {
jens@3:     [responseField setObjectValue: response.bodyString];
jens@3: }    
jens@3: 
jens@3: 
jens@3: @end
jens@3: 
jens@3: int main(int argc, char *argv[])
jens@3: {
jens@3:     return NSApplicationMain(argc,  (const char **) argv);
jens@3: }