prosody
dcf38ac6a38c
util/adhoc.lua

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util/adhoc.lua @ 11741:dcf38ac6a38c

net.server: Add a predrain callaback just before writes Allows sneaking in things in the write buffer just before it's sent to the network stack. For example ack requests, compression flushes or other things that make sense to send after stanzas or other things. This ensures any additional trailing data sent is included in the same write, and possibly the same TCP packet. Other methods used such as timers or nextTick might not have the same effect as it depends on scheduling.
author Kim Alvefur <zash@zash.se>
date Mon, 16 Aug 2021 12:34:52 +0200
parent 11352:e10567199f02
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1 -- luacheck: ignore 212/self
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2
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3 local function new_simple_form(form, result_handler)
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4 return function(self, data, state)
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5 if state or data.form then
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6 if data.action == "cancel" then
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7 return { status = "canceled" };
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8 end
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9 local fields, err = form:data(data.form);
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10 return result_handler(fields, err, data);
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11 else
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12 return { status = "executing", actions = {"next", "complete", default = "complete"}, form = form }, "executing";
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13 end
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14 end
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15 end
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16
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17 local function new_initial_data_form(form, initial_data, result_handler)
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18 return function(self, data, state)
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19 if state or data.form then
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20 if data.action == "cancel" then
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21 return { status = "canceled" };
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22 end
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23 local fields, err = form:data(data.form);
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24 return result_handler(fields, err, data);
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25 else
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26 local values, err = initial_data(data);
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27 if type(err) == "table" then
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28 return {status = "error"; error = err}
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29 elseif type(err) == "string" then
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30 return {status = "error"; error = {type = "cancel"; condition = "internal-server-error", err}}
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31 end
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32 return { status = "executing", actions = {"next", "complete", default = "complete"},
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33 form = { layout = form, values = values } }, "executing";
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34 end
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35 end
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36 end
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37
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38 return { new_simple_form = new_simple_form,
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39 new_initial_data_form = new_initial_data_form };