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mod_rest/jsonmap.lib.lua @ 3855:0e1e900577c4
mod_rest: Improve some comments
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Sat, 25 Jan 2020 00:43:28 +0100 |
| parent | 3854:25c34c9f755c |
| child | 3856:8bdb1729529b |
| rev | line source |
|---|---|
| 3813 | 1 local array = require "util.array"; |
| 2 local jid = require "util.jid"; | |
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3 local json = require "util.json"; |
| 3813 | 4 local st = require "util.stanza"; |
| 5 local xml = require "util.xml"; | |
| 6 | |
| 7 local simple_types = { | |
| 8 -- basic message | |
| 9 body = "text_tag", | |
| 10 subject = "text_tag", | |
| 11 thread = "text_tag", | |
| 12 | |
| 13 -- basic presence | |
| 14 show = "text_tag", | |
| 15 status = "text_tag", | |
| 16 priority = "text_tag", | |
| 17 | |
| 18 state = {"name", "http://jabber.org/protocol/chatstates"}, | |
| 19 nick = {"text_tag", "http://jabber.org/protocol/nick", "nick"}, | |
| 20 delay = {"attr", "urn:xmpp:delay", "delay", "stamp"}, | |
| 21 replace = {"attr", "urn:xmpp:message-correct:0", "replace", "id"}, | |
| 22 | |
| 23 -- XEP-0045 MUC | |
| 24 -- TODO history, password, ??? | |
| 25 join = {"bool_tag", "http://jabber.org/protocol/muc", "x"}, | |
| 26 | |
| 27 -- XEP-0071 | |
| 28 -- FIXME xmlns is awkward | |
| 29 html = { | |
| 30 "func", "http://jabber.org/protocol/xhtml-im", "html", | |
| 31 function (s) --> json string | |
| 32 return tostring(s:get_child("body", "http://www.w3.org/1999/xhtml")); | |
| 33 end; | |
| 34 function (s) --> xml | |
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35 if type(s) == "string" then |
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36 return xml.parse([[<html xmlns='http://jabber.org/protocol/xhtml-im'>]]..s..[[</html>]]); |
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37 end |
| 3813 | 38 end; |
| 39 }; | |
| 40 | |
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41 -- XEP-0199: XMPP Ping |
| 3813 | 42 ping = {"bool_tag", "urn:xmpp:ping", "ping"}, |
| 43 | |
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44 -- XEP-0092: Software Version |
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45 version = {"func", "jabber:iq:version", "query", |
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46 function (s) |
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47 return { |
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48 name = s:get_child_text("name"); |
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49 version = s:get_child_text("version"); |
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50 os = s:get_child_text("os"); |
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51 } |
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52 end, |
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53 function (s) |
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54 local v = st.stanza("query", { xmlns = "jabber:iq:version" }); |
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55 if type(s) == "table" then |
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56 v:text_tag("name", s.name); |
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57 v:text_tag("version", s.version); |
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58 if s.os then |
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59 v:text_tag("os", s.os); |
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60 end |
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61 end |
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62 return v; |
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63 end |
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64 }; |
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65 |
| 3813 | 66 -- XEP-0030 |
| 67 disco = { | |
| 68 "func", "http://jabber.org/protocol/disco#info", "query", | |
| 69 function (s) --> array of features | |
| 70 local identities, features = array(), array(); | |
| 71 for tag in s:childtags() do | |
| 72 if tag.name == "identity" and tag.attr.category and tag.attr.type then | |
| 73 identities:push({ category = tag.attr.category, type = tag.attr.type, name = tag.attr.name }); | |
| 74 elseif tag.name == "feature" and tag.attr.var then | |
| 75 features:push(tag.attr.var); | |
| 76 end | |
| 77 end | |
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78 return { node = s.attr.node, identities = identities, features = features, }; |
| 3813 | 79 end; |
| 80 function (s) | |
| 81 local disco = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" }); | |
| 82 if type(s) == "table" then | |
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83 disco.attr.node = tostring(s.node); |
| 3813 | 84 if s.identities then |
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85 for _, identity in ipairs(s.identities) do |
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86 disco:tag("identity", { category = identity.category, type = identity.type, name = identity.name }):up(); |
| 3813 | 87 end |
| 88 end | |
| 89 if s.features then | |
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90 for _, feature in ipairs(s.features) do |
| 3813 | 91 disco:tag("feature", { var = feature }):up(); |
| 92 end | |
| 93 end | |
| 94 end | |
| 95 return disco; | |
| 96 end; | |
| 97 }; | |
| 98 | |
| 99 items = { | |
| 100 "func", "http://jabber.org/protocol/disco#items", "query", | |
| 101 function (s) --> array of features | |
| 102 local items = array(); | |
| 103 for item in s:childtags("item") do | |
| 104 items:push({ jid = item.attr.jid, node = item.attr.node, name = item.attr.name }); | |
| 105 end | |
| 106 return items; | |
| 107 end; | |
| 108 function (s) | |
| 109 local disco = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#items" }); | |
| 110 if type(s) == "table" then | |
| 111 for _, item in ipairs(s) do | |
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112 if type(item) == "string" then |
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113 disco:tag("item", { jid = item }); |
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114 elseif type(item) == "table" then |
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115 disco:tag("item", { jid = item.jid, node = item.node, name = item.name }); |
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116 end |
| 3813 | 117 end |
| 118 end | |
| 119 return disco; | |
| 120 end; | |
| 121 }; | |
| 122 | |
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123 -- XEP-0066: Out of Band Data |
| 3813 | 124 oob_url = {"func", "jabber:iq:oob", "query", |
| 125 function (s) | |
| 126 return s:get_child_text("url"); | |
| 127 end; | |
| 128 function (s) | |
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129 if type(s) == "string" then |
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130 return st.stanza("query", { xmlns = "jabber:iq:oob" }):text_tag("url", s); |
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131 end |
| 3813 | 132 end; |
| 133 }; | |
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134 |
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135 -- XEP-XXXX: User-defined Data Transfer |
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136 payload = {"func", "urn:xmpp:udt:0", "payload", |
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137 function (s) |
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138 local rawjson = s:get_child_text("json", "urn:xmpp:json:0"); |
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139 if not rawjson then return nil, "missing-json-payload"; end |
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140 local parsed, err = json.decode(rawjson); |
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141 if not parsed then return nil, err; end |
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142 return { |
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143 datatype = s.attr.datatype; |
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144 data = parsed; |
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145 }; |
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146 end; |
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147 function (s) |
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148 if type(s) == "table" then |
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149 return st.stanza("payload", { xmlns = "urn:xmpp:udt:0", datatype = s.datatype }) |
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150 :tag("json", { xmlns = "urn:xmpp:json:0" }):text(json.encode(s.data)); |
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151 end; |
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152 end |
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153 }; |
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154 |
| 3813 | 155 }; |
| 156 | |
| 157 local implied_kinds = { | |
| 158 disco = "iq", | |
| 159 items = "iq", | |
| 160 ping = "iq", | |
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161 version = "iq", |
| 3813 | 162 |
| 163 body = "message", | |
| 164 html = "message", | |
| 165 replace = "message", | |
| 166 state = "message", | |
| 167 subject = "message", | |
| 168 thread = "message", | |
| 169 | |
| 170 join = "presence", | |
| 171 priority = "presence", | |
| 172 show = "presence", | |
| 173 status = "presence", | |
| 174 } | |
| 175 | |
| 176 local kind_by_type = { | |
| 177 get = "iq", set = "iq", result = "iq", | |
| 178 normal = "message", chat = "message", headline = "message", groupchat = "message", | |
| 179 available = "presence", unavailable = "presence", | |
| 180 subscribe = "presence", unsubscribe = "presence", | |
| 181 subscribed = "presence", unsubscribed = "presence", | |
| 182 } | |
| 183 | |
| 184 local function st2json(s) | |
| 185 local t = { | |
| 186 kind = s.name, | |
| 187 type = s.attr.type, | |
| 188 to = s.attr.to, | |
| 189 from = s.attr.from, | |
| 190 id = s.attr.id, | |
| 191 }; | |
| 192 if s.name == "presence" and not s.attr.type then | |
| 193 t.type = "available"; | |
| 194 end | |
| 195 | |
| 196 if t.to then | |
| 197 t.to = jid.prep(t.to); | |
| 198 if not t.to then return nil, "invalid-jid-to"; end | |
| 199 end | |
| 200 if t.from then | |
| 201 t.from = jid.prep(t.from); | |
| 202 if not t.from then return nil, "invalid-jid-from"; end | |
| 203 end | |
| 204 | |
| 205 if t.type == "error" then | |
| 206 local err_typ, err_condition, err_text = s:get_error(); | |
| 207 t.error = { | |
| 208 type = err_typ, | |
| 209 condition = err_condition, | |
| 210 text = err_text | |
| 211 }; | |
| 212 return t; | |
| 213 end | |
| 214 | |
| 215 for k, typ in pairs(simple_types) do | |
| 216 if typ == "text_tag" then | |
| 217 t[k] = s:get_child_text(k); | |
| 218 elseif typ[1] == "text_tag" then | |
| 219 t[k] = s:get_child_text(typ[3], typ[2]); | |
| 220 elseif typ[1] == "name" then | |
| 221 local child = s:get_child(nil, typ[2]); | |
| 222 if child then | |
| 223 t[k] = child.name; | |
| 224 end | |
| 225 elseif typ[1] == "attr" then | |
| 226 local child = s:get_child(typ[3], typ[2]) | |
| 227 if child then | |
| 228 t[k] = child.attr[typ[4]]; | |
| 229 end | |
| 230 elseif typ[1] == "bool_tag" then | |
| 231 if s:get_child(typ[3], typ[2]) then | |
| 232 t[k] = true; | |
| 233 end | |
| 234 elseif typ[1] == "func" then | |
| 235 local child = s:get_child(typ[3], typ[2] or k); | |
| 236 -- TODO handle err | |
| 237 if child then | |
| 238 t[k] = typ[4](child); | |
| 239 end | |
| 240 end | |
| 241 end | |
| 242 | |
| 243 return t; | |
| 244 end | |
| 245 | |
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246 local function str(s) |
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247 if type(s) == "string" then |
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248 return s; |
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249 end |
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250 end |
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251 |
| 3813 | 252 local function json2st(t) |
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253 if type(t) ~= "table" or not str(next(t)) then |
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254 return nil, "invalid-json"; |
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255 end |
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256 local kind = str(t.kind) or kind_by_type[str(t.type)]; |
| 3813 | 257 if not kind then |
| 258 for k, implied in pairs(implied_kinds) do | |
| 259 if t[k] then | |
| 260 kind = implied; | |
| 261 break | |
| 262 end | |
| 263 end | |
| 264 end | |
| 265 | |
| 266 local s = st.stanza(kind or "message", { | |
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267 type = t.type ~= "available" and str(t.type) or nil, |
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268 to = str(t.to) and jid.prep(t.to); |
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269 from = str(t.to) and jid.prep(t.from); |
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270 id = str(t.id), |
| 3813 | 271 }); |
| 272 | |
| 273 if t.to and not s.attr.to then | |
| 274 return nil, "invalid-jid-to"; | |
| 275 end | |
| 276 if t.from and not s.attr.from then | |
| 277 return nil, "invalid-jid-from"; | |
| 278 end | |
| 3819 | 279 if kind == "iq" and not s.attr.type then |
| 280 s.attr.type = "get"; | |
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281 end |
| 3813 | 282 |
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283 if type(t.error) == "table" then |
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284 return st.error_reply(st.reply(s), str(t.error.type), str(t.error.condition), str(t.error.text)); |
| 3813 | 285 elseif t.type == "error" then |
| 286 s:text_tag("error", t.body, { code = t.error_code and tostring(t.error_code) }); | |
| 287 return s; | |
| 288 end | |
| 289 | |
| 290 for k, v in pairs(t) do | |
| 291 local typ = simple_types[k]; | |
| 292 if typ then | |
| 293 if typ == "text_tag" then | |
| 294 s:text_tag(k, v); | |
| 295 elseif typ[1] == "text_tag" then | |
| 296 s:text_tag(typ[3] or k, v, typ[2] and { xmlns = typ[2] }); | |
| 297 elseif typ[1] == "name" then | |
| 298 s:tag(v, { xmlns = typ[2] }):up(); | |
| 299 elseif typ[1] == "attr" then | |
| 300 s:tag(typ[3] or k, { xmlns = typ[2], [ typ[4] or k ] = v }):up(); | |
| 301 elseif typ[1] == "bool_tag" then | |
| 302 s:tag(typ[3] or k, { xmlns = typ[2] }):up(); | |
| 303 elseif typ[1] == "func" then | |
| 304 s:add_child(typ[5](v)):up(); | |
| 305 end | |
| 306 end | |
| 307 end | |
| 308 | |
| 309 s:reset(); | |
| 310 | |
| 311 return s; | |
| 312 end | |
| 313 | |
| 314 return { | |
| 315 st2json = st2json; | |
| 316 json2st = json2st; | |
| 317 }; |
