Objective-C

Debugging with Socket Session Logging

See more Socket/SSL/TLS Examples

Debugging with socket session logging.

The Chilkat Socket component provides properties for keeping a session log making it possible to see the exact bytes received and sent on a TCP/IP or SSL connection. To enable session logging, set the KeepSessionLog property = _TRUE_. The SessionLogEncoding property controls how binary, non-printable bytes are represented in the log. There are two possible settings: Possible values are "esc" and "hex". The default value is "esc".

When set to "hex", the bytes are encoded as a hexidecimalized string. The "esc" encoding is a C-string like encoding, and is more compact than hex if most of the data to be logged is text. Printable us-ascii chars are unmodified. Common "C" control chars are represented as "\r", "\n", "\t", etc. Non-printable and byte values greater than 0x80 are escaped using a backslash and hex encoding: \xHH. Certain printable chars are backslashed: SPACE, double-quote, single-quote, etc.

Objective-C

#import <CkoSocket.h>
#import <NSString.h>

BOOL success = NO;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoSocket *socket = [[CkoSocket alloc] init];

// Enable session logging:
socket.KeepSessionLog = YES;
socket.SessionLogEncoding = @"esc";

// To demonstrate session logging, we'll connect to an
// HTTP server and download the HTTP response header:
BOOL ssl = NO;
int maxWaitMillisec = 20000;
success = [socket Connect: @"www.chilkatsoft.com" port: [NSNumber numberWithInt: 80] ssl: ssl maxWaitMs: [NSNumber numberWithInt: maxWaitMillisec]];
if (success != YES) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}

// Set maximum timeouts for reading an writing (in millisec)
socket.MaxReadIdleMs = [NSNumber numberWithInt:10000];
socket.MaxSendIdleMs = [NSNumber numberWithInt:10000];

// The socket component includes a BuildHttpGetRequest
// method for convenience. Build a GET and send it to 
// the web server:
NSString *httpGet = 0;
httpGet = [socket BuildHttpGetRequest: @"http://www.chilkatsoft.com/"];

// Send it...
success = [socket SendString: httpGet];
if (success != YES) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}

// Read the response up to the first double CRLF:
NSString *httpHeader = [socket ReceiveUntilMatch: @"\r\n\r\n"];
if (socket.LastMethodSuccess != YES) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}

// Close the connection with the server
// Wait a max of 20 seconds (20000 millsec)
success = [socket Close: [NSNumber numberWithInt: 20000]];

// Display the session log:
NSLog(@"%@",socket.SessionLog);

// Show the HTTP response header:
NSLog(@"%@",httpHeader);