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annotate mod_aws_profile/mod_aws_profile.lua @ 5585:5b316088bef5

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mod_rest: Use logger of HTTP request in trunk In Prosody trunk rev c975dafa4303 each HTTP request gained its own log sink, to make it easy to log things related to each request and group those messages. Especially where async is used, spreading the request and response apart as mod_rest does with iq stanzas, this grouped logging should help find related messages.
author Kim Alvefur <zash@zash.se>
date Fri, 07 Jul 2023 00:10:37 +0200
parents 1d719d4ef18f
children 616c0459aca7
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1 local http = require "net.http";
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2 local json = require "util.json";
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3 local parse_timestamp = require "util.datetime".parse;
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4
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5 module:set_global();
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6
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7 local current_credentials = module:shared("/*/aws_profile/credentials");
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8
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9 local function get_role_credentials(role_name, cb)
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10 http.request("http://169.254.169.254/latest/meta-data/iam/security-credentials/"..role_name, nil, function (credentials_json)
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11 local credentials = credentials_json and json.decode(credentials_json);
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12 if not credentials or not (credentials.AccessKeyId and credentials.SecretAccessKey) then
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13 module:log("warn", "Failed to fetch credentials for %q", role_name);
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14 cb(nil);
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15 return;
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16 end
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17 local expiry = parse_timestamp(credentials.Expiration);
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18 local ttl = os.difftime(expiry, os.time());
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19 cb({
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20 access_key = credentials.AccessKeyId;
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21 secret_key = credentials.SecretAccessKey;
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22 ttl = ttl;
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23 expiry = expiry;
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24 });
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25 end);
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26 end
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27
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28 local function get_credentials(cb)
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29 http.request("http://169.254.169.254/latest/meta-data/iam/security-credentials", nil, function (role_name)
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30 role_name = role_name and role_name:match("%S+");
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31 if not role_name then
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32 module:log("warn", "Unable to discover role name");
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33 cb(nil);
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34 return;
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35 end
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36 get_role_credentials(role_name, cb);
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37 end);
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38 end
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39
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40 function refresh_credentials(force)
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41 if not force and current_credentials.expiry and current_credentials.expiry - os.time() > 300 then
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42 return;
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43 end
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44 get_credentials(function (credentials)
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45 if not credentials then
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46 module:log("warn", "Failed to refresh credentials!");
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47 return;
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48 end
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49 current_credentials.access_key = credentials.access_key;
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50 current_credentials.secret_key = credentials.secret_key;
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51 current_credentials.expiry = credentials.expiry;
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52 module:timer(credentials.ttl or 240, refresh_credentials);
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53 module:fire_event("aws_profile/credentials-refreshed", current_credentials);
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54 end);
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55 end
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56
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57 function module.load()
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58 refresh_credentials(true);
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59 end