Lua

Send BinData Contents over a Socket

Demonstrates Socket.SendBd, which sends bytes from a BinData beginning at an offset. A numBytes of 0 sends from the offset through the end of the data.

Background. The BinData receive methods accumulate raw bytes in a BinData object. A single receive returns only what is currently available, whereas the counted receive waits for an exact number of bytes.

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Lua

local chilkat = require("chilkat")

local socket = chilkat.Socket.new()

-- Connect to the server using TLS.
local bTls = true
local maxWaitMs = 5000
local success = socket:connect("example.com", 5000, bTls, maxWaitMs)
if not success then
    print(socket.last_error_text)
    return
end

-- Place some bytes into a BinData to be sent.
local bd = chilkat.BinData.new()
bd:append_string("message payload", "utf-8")

-- Send bytes from the BinData starting at the given offset.  A numBytes of 0 sends from the offset
-- through the end of the data.
success = socket:send_bd(bd, 0, 0)
if not success then
    print(socket.last_error_text)
    return
end

print("Sent " .. bd.num_bytes .. " bytes.")