Zig

Demonstrates KeepSessionLog and SessionLog

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/TLS 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.

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const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

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

    const socket = try chilkat.Socket.init();
    defer socket.deinit();

    // Enable session logging:
    socket.setKeepSessionLog(true);
    socket.setSessionLogEncoding("esc");

    const tls = true;
    const max_wait_millisec = 20000;
    socket.connect("www.chilkatsoft.com", 443, tls, max_wait_millisec) catch {
        std.debug.print("{s}\n", .{try socket.getLastErrorText(alloc)});
        return;
    };

    // Send a GET start line to the web server..
    socket.sendString("GET /abc123.abc123 HTTP/1.1\r\n") catch {
        std.debug.print("{s}\n", .{try socket.getLastErrorText(alloc)});
        return;
    };

    // Send some bytes that will cause an error...
    const bin_data = try chilkat.BinData.init();
    defer bin_data.deinit();
    bin_data.appendEncoded("01020304", "hex") catch {};
    try socket.sendBd(bin_data, 0, 0);

    // Read the response up to the first double CRLF:
    _ = socket.receiveUntilMatch(alloc, "\r\n\r\n") catch {
        std.debug.print("{s}\n", .{try socket.getLastErrorText(alloc)});
        return;
    };

    // Close the connection with the server
    // Wait a max of 20 seconds (20000 millsec)
    socket.close(20000) catch {};

    // Display the session log:
    std.debug.print("{s}\n", .{try socket.getSessionLog(alloc)});

    // The Session log will show the exact bytes sent and received.
    // In this case, the session log shows:

    //     SendString: GET\x20/abc123.abc123\x20HTTP/1.1\r\n
    //
    //     SendBytes: \x01\x02\x03\x04
    //     ReceiveUntilMatch: HTTP/1.1\x20400\x20Bad\x20Request\r\n
    //         Content-Type:\x20text/html;\x20charset=us-ascii\r\n
    //         Server:\x20Microsoft-HTTPAPI/2.0\r\n
    //         Date:\x20Thu,\x2027\x20Oct\x202016\x2013:16:02\x20GMT\r\n
    //         Connection:\x20close\r\n
    //         Content-Length:\x20339\r\n
    //         \r\n
    //         <!DOCTYPE\x20HTML\x20PUBLIC\x20\"-//W3C//DTD\x20HTML\x204.01//EN\"\"http://www.w
    //         3.org/TR/html4/strict.dtd\">\r\n
    //         <HTML><HEAD><TITLE>Bad\x20Request</TITLE>\r\n
    //         <META\x20HTTP-EQUIV=\"Content-Type\"\x20Content=\"text/html;\x20charset=us-ascii
    //         \"></HEAD>\r\n
    //         <BODY><h2>Bad\x20Request\x20-\x20Invalid\x20Header</h2>\r\n
    //         <hr><p>HTTP\x20Error\x20400.\x20The\x20request\x20has\x20an\x20invalid\x20header
    //         \x20name.</p>\r\n
    //         </BODY></HTML>\r\n
    //
}