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annotate util/error.lua @ 10486:479e96e554c8

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net.server_epoll: Add debug logging for delayed reading In :onreadable, if there is still buffered incoming data after reading from the socket (as indicated by the :dirty method, usually because LuaSocket has an 8k buffer that's full but it read a smaller amount), another attempt to read is scheduled via this :pausefor method. This is also called from some other places where it would be pointless to read because there shouldn't be any data. In the delayed read case, this should report that the socket is "dirty". If it reports that the socket is "clean" then the question is where the buffer contents went? If this doesn't get logged after the scheduled time (0.000001s by default) then this would suggests a problem with timer or scheduling.
author Kim Alvefur <zash@zash.se>
date Sat, 07 Dec 2019 19:05:10 +0100
parents 744ca71a49f7
children d9132e7412b8
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1 local error_mt = { __name = "error" };
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2
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3 function error_mt:__tostring()
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4 return ("error<%s:%s:%s>"):format(self.type, self.condition, self.text or "");
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5 end
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6
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7 local function is_err(e)
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8 return getmetatable(e) == error_mt;
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9 end
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10
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11 local function new(e, context, registry)
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12 local template = (registry and registry[e]) or e or {};
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13 return setmetatable({
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14 type = template.type or "cancel";
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15 condition = template.condition or "undefined-condition";
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16 text = template.text;
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17 code = template.code or 500;
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18
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19 context = context or template.context or { _error_id = e };
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20 }, error_mt);
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21 end
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22
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23 local function coerce(ok, err, ...)
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24 if ok or is_err(err) then
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25 return ok, err, ...;
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26 end
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28 local new_err = setmetatable({
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29 native = err;
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30
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31 type = "cancel";
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32 condition = "undefined-condition";
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33 }, error_mt);
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34 return ok, new_err, ...;
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35 end
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36
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37 local function from_stanza(stanza, context)
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38 local error_type, condition, text = stanza:get_error();
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39 return setmetatable({
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40 type = error_type or "cancel";
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41 condition = condition or "undefined-condition";
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42 text = text;
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43
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44 context = context or { stanza = stanza };
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45 }, error_mt);
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46 end
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47
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48 return {
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49 new = new;
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50 coerce = coerce;
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51 is_err = is_err;
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52 from_stanza = from_stanza;
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53 }