prosody
771eb453e03a
util/http.lua

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util/http.lua @ 13146:771eb453e03a

util.sqlite3: Deduplicate query methods There were 3 very similar methods: - :execute() - :execute_query() - :execute_update() The first one returns the prepared statement and is mainly used internally in the library for CREATE statements. The later two only really differ in how the results are returned. Those two are one main method and one small one that only picks out the iterator.
author Kim Alvefur <zash@zash.se>
date Sat, 10 Jun 2023 22:02:15 +0200
parent 13124:f15e23840780
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rev   line source
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cc9d460aa779 util.http: New module for HTTP helper functions
Florian Zeitz <florob@babelmonkeys.de>
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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 = pairs, ipairs;
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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 url_codes = {};
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13 for i = 0, 255 do
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14 local c = char(i);
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15 local u = format("%%%02x", i);
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16 url_codes[c] = u;
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17 url_codes[u] = c;
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18 url_codes[u:upper()] = c;
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19 end
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20 local function urlencode(s)
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21 return s and (s:gsub("[^a-zA-Z0-9.~_-]", url_codes));
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22 end
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23 local function urldecode(s)
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24 return s and (s:gsub("%%%x%x", url_codes));
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25 end
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26
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27 local function _formencodepart(s)
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28 return s and (urlencode(s):gsub("%%20", "+"));
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29 end
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30
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31 local function formencode(form)
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32 local result = {};
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33 if form[1] then -- Array of ordered { name, value }
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34 for _, field in ipairs(form) do
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35 t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
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36 end
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37 else -- Unordered map of name -> value
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38 for name, value in pairs(form) do
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39 t_insert(result, _formencodepart(name).."=".._formencodepart(value));
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40 end
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41 end
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42 return t_concat(result, "&");
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43 end
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44
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45 local function formdecode(s)
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46 if not s:match("=") then return urldecode(s); end
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47 local r = {};
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48 for k, v in s:gmatch("([^=&]*)=([^&]*)") do
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49 k, v = k:gsub("%+", "%%20"), v:gsub("%+", "%%20");
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50 k, v = urldecode(k), urldecode(v);
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51 t_insert(r, { name = k, value = v });
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52 r[k] = v;
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53 end
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54 return r;
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55 end
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56
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57 local function contains_token(field, token)
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58 field = ","..field:gsub("[ \t]", ""):lower()..",";
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59 return field:find(","..token:lower()..",", 1, true) ~= nil;
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60 end
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61
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62 local function normalize_path(path, is_dir)
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63 if is_dir then
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64 if path:sub(-1,-1) ~= "/" then path = path.."/"; end
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65 else
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66 if path:sub(-1,-1) == "/" then path = path:sub(1, -2); end
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67 end
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68 if path:sub(1,1) ~= "/" then path = "/"..path; end
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69 return path;
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70 end
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71
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72 --- Parse the RFC 7239 Forwarded header into array of key-value pairs.
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73 local function parse_forwarded(forwarded)
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74 if type(forwarded) ~= "string" then
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75 return nil;
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76 end
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77
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78 local fwd = {}; -- array
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79 local cur = {}; -- map, to which we add the next key-value pair
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80 for key, quoted, value, delim in forwarded:gmatch("(%w+)%s*=%s*(\"?)([^,;\"]+)%2%s*(.?)") do
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81 -- FIXME quoted quotes like "foo\"bar"
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82 -- unlikely when only dealing with IP addresses
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83 if quoted == '"' then
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84 value = value:gsub("\\(.)", "%1");
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85 end
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86
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87 cur[key:lower()] = value;
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88 if delim == "" or delim == "," then
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89 t_insert(fwd, cur)
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90 if delim == "" then
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91 -- end of the string
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92 break;
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93 end
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94 cur = {};
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95 elseif delim ~= ";" then
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96 -- misparsed
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97 return false;
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98 end
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99 end
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100
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101 return fwd;
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102 end
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103
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104 return {
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105 urlencode = urlencode, urldecode = urldecode;
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106 formencode = formencode, formdecode = formdecode;
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107 contains_token = contains_token;
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108 normalize_path = normalize_path;
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109 parse_forwarded = parse_forwarded;
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110 };