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199 <h1>Object Instance <code>luci.jsonc.parser</code></h1>
202 LuCI JSON parser instance.
203 A JSON parser instance is useful to parse JSON data chunk by chunk, without
204 the need to assemble all data in advance.</p>
213 <table class="function_list">
216 <td class="name" nowrap><a href="#parser.parse">parser:parse</a> (json)</td>
219 Parses one chunk of JSON data.</td>
223 <td class="name" nowrap><a href="#parser.get">parser:get</a> ()</td>
226 Convert parsed JSON data into Lua table.</td>
230 <td class="name" nowrap><a href="#parser.set">parser:set</a> (data)</td>
233 Put Lua data into the parser.</td>
237 <td class="name" nowrap><a href="#parser.sink">parser:sink</a> ()</td>
240 Generate an ltn12-compatible sink.</td>
244 <td class="name" nowrap><a href="#parser.stringify">parser:stringify</a> (pretty)</td>
247 Serialize current parser state as JSON.</td>
261 <h2><a name="functions"></a>Functions</h2>
262 <dl class="function">
266 <dt><a name="parser.parse"></a><strong>parser:parse</strong> (json)</dt>
270 Parses one chunk of JSON data.
278 json: String containing the JSON fragment to parse
287 <pre>parser = luci.jsonc.new()
290 chunk = ... -- fetch a cunk of data, e.g. from a socket
291 finish, errmsg = <b>parser.parse(chunk)</b>
293 if finish == nil then
294 error("Cannot parse JSON: " .. errmsg)
297 if finish == true then
304 <h3>Return value:</h3>
306 <li><code>true</code> if a complete JSON object has been parsed and no further input is
308 <li><code>false</code> if further input is required</li>
309 <li><code>nil</code> if an error was encountered while parsing the current chunk.
310 In this case a string describing the parse error is returned as second
318 <li><a href="#parser.get">
329 <dt><a name="parser.get"></a><strong>parser:get</strong> ()</dt>
333 Convert parsed JSON data into Lua table.
341 <pre>parser = luci.jsonc.new()
342 parser:parse('{ "example": "test" }')
345 print(data.example) -- "test"</pre>
349 <h3>Return value:</h3>
350 Parsed JSON object converted into a Lua table or <code>nil</code> if the parser
351 didn't finish or encountered an error.
358 <li><a href="#parser.parse">
369 <dt><a name="parser.set"></a><strong>parser:set</strong> (data)</dt>
373 Put Lua data into the parser.
381 data: Lua data to put into the parser object. The data is converted to an
382 internal JSON representation that can be dumped with <code>stringify()</code>.
383 The conversion follows the rules described in <code>luci.jsonc.stringify</code>.
392 <pre>parser = luci.jsonc.new()
393 parser:set({ "some", "data" })</pre>
397 <h3>Return value:</h3>
405 <li><a href="#parser.stringify">
416 <dt><a name="parser.sink"></a><strong>parser:sink</strong> ()</dt>
420 Generate an ltn12-compatible sink.
428 <pre>parser = luci.jsonc.new()
429 ltn12.pump.all(ltn12.source.file(io.input()), parser:sink())
430 print(parser:get())</pre>
434 <h3>Return value:</h3>
435 Returns a function that can be used as an ltn12 sink.
444 <dt><a name="parser.stringify"></a><strong>parser:stringify</strong> (pretty)</dt>
448 Serialize current parser state as JSON.
456 pretty: A boolean value indicating whether the resulting JSON should be pretty printed.
465 <pre>parser = luci.jsonc.new()
466 parser:parse('{ "example": "test" }')
467 print(parser:serialize()) -- '{"example":"test"}'</pre>
471 <h3>Return value:</h3>
472 Returns the serialized JSON data of this parser instance.
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