prosody
cfbea3064aa9
util/http.lua

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util/http.lua @ 9504:cfbea3064aa9

mod_http: Move normalize_path to util.http
author Kim Alvefur <zash@zash.se>
date Sun, 14 Oct 2018 14:31:59 +0200
parent 5471:34bfd26525f5
child 9759:1af5106a2c34
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5299
cc9d460aa779 util.http: New module for HTTP helper functions
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1 -- Prosody IM
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2 -- Copyright (C) 2013 Florian Zeitz
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3 --
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4 -- This project is MIT/X11 licensed. Please see the
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5 -- COPYING file in the source package for more information.
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6 --
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7
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8 local format, char = string.format, string.char;
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9 local pairs, ipairs, tonumber = pairs, ipairs, tonumber;
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10 local t_insert, t_concat = table.insert, table.concat;
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11
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12 local function urlencode(s)
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13 return s and (s:gsub("[^a-zA-Z0-9.~_-]", function (c) return format("%%%02x", c:byte()); end));
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14 end
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15 local function urldecode(s)
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16 return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end));
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17 end
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18
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19 local function _formencodepart(s)
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20 return s and (s:gsub("%W", function (c)
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21 if c ~= " " then
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22 return format("%%%02x", c:byte());
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23 else
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24 return "+";
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25 end
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26 end));
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27 end
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28
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29 local function formencode(form)
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30 local result = {};
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31 if form[1] then -- Array of ordered { name, value }
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32 for _, field in ipairs(form) do
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33 t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
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34 end
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35 else -- Unordered map of name -> value
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36 for name, value in pairs(form) do
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37 t_insert(result, _formencodepart(name).."=".._formencodepart(value));
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38 end
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39 end
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40 return t_concat(result, "&");
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41 end
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42
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43 local function formdecode(s)
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44 if not s:match("=") then return urldecode(s); end
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45 local r = {};
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46 for k, v in s:gmatch("([^=&]*)=([^&]*)") do
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47 k, v = k:gsub("%+", "%%20"), v:gsub("%+", "%%20");
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48 k, v = urldecode(k), urldecode(v);
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49 t_insert(r, { name = k, value = v });
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50 r[k] = v;
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51 end
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52 return r;
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53 end
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54
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55 local function contains_token(field, token)
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56 field = ","..field:gsub("[ \t]", ""):lower()..",";
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57 return field:find(","..token:lower()..",", 1, true) ~= nil;
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58 end
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59
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60 local function normalize_path(path, is_dir)
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61 if is_dir then
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62 if path:sub(-1,-1) ~= "/" then path = path.."/"; end
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63 else
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64 if path:sub(-1,-1) == "/" then path = path:sub(1, -2); end
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65 end
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66 if path:sub(1,1) ~= "/" then path = "/"..path; end
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67 return path;
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68 end
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69
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70 return {
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71 urlencode = urlencode, urldecode = urldecode;
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72 formencode = formencode, formdecode = formdecode;
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73 contains_token = contains_token;
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74 normalize_path = normalize_path;
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75 };