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  46. AutoConnect for ESP8266/ESP32
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  49. Tips for data conversion
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  119. Overview
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  124. Getting started
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  129. AutoConnect menu
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  134. Basic usage
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  140. Advanced usage
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  145. <span class="md-nav__icon md-icon"></span>
  146. Advanced usage
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  148. <ul class="md-nav__list" data-md-scrollfix>
  149. <li class="md-nav__item">
  150. <a href="advancedusage.html" class="md-nav__link">
  151. Advanced usage
  152. </a>
  153. </li>
  154. <li class="md-nav__item">
  155. <a href="adconnection.html" class="md-nav__link">
  156. AutoConnect WiFi connection control
  157. </a>
  158. </li>
  159. <li class="md-nav__item">
  160. <a href="adcpcontrol.html" class="md-nav__link">
  161. Captive portal control
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  163. </li>
  164. <li class="md-nav__item">
  165. <a href="adnetwork.html" class="md-nav__link">
  166. Settings and controls for network and WiFi
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  168. </li>
  169. <li class="md-nav__item">
  170. <a href="adauthentication.html" class="md-nav__link">
  171. Authentication settings
  172. </a>
  173. </li>
  174. <li class="md-nav__item">
  175. <a href="adcredential.html" class="md-nav__link">
  176. Credential accesses
  177. </a>
  178. </li>
  179. <li class="md-nav__item">
  180. <a href="adexterior.html" class="md-nav__link">
  181. Customizing page appearance
  182. </a>
  183. </li>
  184. <li class="md-nav__item">
  185. <a href="adothers.html" class="md-nav__link">
  186. Other operation settings and controls
  187. </a>
  188. </li>
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  193. <input class="md-nav__toggle md-toggle" data-md-toggle="nav-6" type="checkbox" id="nav-6" >
  194. <label class="md-nav__link" for="nav-6">
  195. Custom Web pages
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  197. </label>
  198. <nav class="md-nav" aria-label="Custom Web pages" data-md-level="1">
  199. <label class="md-nav__title" for="nav-6">
  200. <span class="md-nav__icon md-icon"></span>
  201. Custom Web pages
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  204. <li class="md-nav__item">
  205. <a href="acintro.html" class="md-nav__link">
  206. Custom Web pages with AutoConnect
  207. </a>
  208. </li>
  209. <li class="md-nav__item">
  210. <a href="acelements.html" class="md-nav__link">
  211. AutoConnectElements
  212. </a>
  213. </li>
  214. <li class="md-nav__item">
  215. <a href="acjson.html" class="md-nav__link">
  216. Custom Web pages with JSON
  217. </a>
  218. </li>
  219. <li class="md-nav__item">
  220. <a href="achandling.html" class="md-nav__link">
  221. Handling the custom Web pages
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  230. OTA Updates
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  233. <nav class="md-nav" aria-label="OTA Updates" data-md-level="1">
  234. <label class="md-nav__title" for="nav-7">
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  236. OTA Updates
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  239. <li class="md-nav__item">
  240. <a href="otaupdate.html" class="md-nav__link">
  241. OTA Updates
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  245. <a href="otabrowser.html" class="md-nav__link">
  246. Using Web Browser
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  250. <a href="otaserver.html" class="md-nav__link">
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  260. Library APIs
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  264. <label class="md-nav__title" for="nav-8">
  265. <span class="md-nav__icon md-icon"></span>
  266. Library APIs
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  268. <ul class="md-nav__list" data-md-scrollfix>
  269. <li class="md-nav__item">
  270. <a href="api.html" class="md-nav__link">
  271. AutoConnect API
  272. </a>
  273. </li>
  274. <li class="md-nav__item">
  275. <a href="apiaux.html" class="md-nav__link">
  276. AutoConnectAux API
  277. </a>
  278. </li>
  279. <li class="md-nav__item">
  280. <a href="apiconfig.html" class="md-nav__link">
  281. AutoConnectConfig API
  282. </a>
  283. </li>
  284. <li class="md-nav__item">
  285. <a href="apielements.html" class="md-nav__link">
  286. AutoConnectElements API
  287. </a>
  288. </li>
  289. <li class="md-nav__item">
  290. <a href="apiupdate.html" class="md-nav__link">
  291. AutoConnectUpdate API
  292. </a>
  293. </li>
  294. <li class="md-nav__item">
  295. <a href="apiextra.html" class="md-nav__link">
  296. Something extra
  297. </a>
  298. </li>
  299. </ul>
  300. </nav>
  301. </li>
  302. <li class="md-nav__item md-nav__item--active md-nav__item--nested">
  303. <input class="md-nav__toggle md-toggle" data-md-toggle="nav-9" type="checkbox" id="nav-9" checked>
  304. <label class="md-nav__link" for="nav-9">
  305. Examples
  306. <span class="md-nav__icon md-icon"></span>
  307. </label>
  308. <nav class="md-nav" aria-label="Examples" data-md-level="1">
  309. <label class="md-nav__title" for="nav-9">
  310. <span class="md-nav__icon md-icon"></span>
  311. Examples
  312. </label>
  313. <ul class="md-nav__list" data-md-scrollfix>
  314. <li class="md-nav__item">
  315. <a href="howtoembed.html" class="md-nav__link">
  316. How to embed
  317. </a>
  318. </li>
  319. <li class="md-nav__item md-nav__item--active">
  320. <input class="md-nav__toggle md-toggle" data-md-toggle="toc" type="checkbox" id="__toc">
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  322. Tips for data conversion
  323. <span class="md-nav__icon md-icon"></span>
  324. </label>
  325. <a href="datatips.html" class="md-nav__link md-nav__link--active">
  326. Tips for data conversion
  327. </a>
  328. <nav class="md-nav md-nav--secondary" aria-label="Table of contents">
  329. <label class="md-nav__title" for="__toc">
  330. <span class="md-nav__icon md-icon"></span>
  331. Table of contents
  332. </label>
  333. <ul class="md-nav__list" data-md-scrollfix>
  334. <li class="md-nav__item">
  335. <a href="#convert-autoconnectelements-value-to-actual-data-type" class="md-nav__link">
  336. Convert AutoConnectElements value to actual data type
  337. </a>
  338. <nav class="md-nav" aria-label="Convert AutoConnectElements value to actual data type">
  339. <ul class="md-nav__list">
  340. <li class="md-nav__item">
  341. <a href="#integer" class="md-nav__link">
  342. Integer
  343. </a>
  344. </li>
  345. <li class="md-nav__item">
  346. <a href="#float" class="md-nav__link">
  347. Float
  348. </a>
  349. </li>
  350. <li class="md-nav__item">
  351. <a href="#date-time" class="md-nav__link">
  352. Date &amp; Time
  353. </a>
  354. </li>
  355. <li class="md-nav__item">
  356. <a href="#ip-address" class="md-nav__link">
  357. IP address
  358. </a>
  359. </li>
  360. </ul>
  361. </nav>
  362. </li>
  363. <li class="md-nav__item">
  364. <a href="#validation-for-the-value" class="md-nav__link">
  365. Validation for the value
  366. </a>
  367. <nav class="md-nav" aria-label="Validation for the value">
  368. <ul class="md-nav__list">
  369. <li class="md-nav__item">
  370. <a href="#url" class="md-nav__link">
  371. URL
  372. </a>
  373. </li>
  374. <li class="md-nav__item">
  375. <a href="#dns-hostname" class="md-nav__link">
  376. DNS hostname
  377. </a>
  378. </li>
  379. <li class="md-nav__item">
  380. <a href="#email-address-2" class="md-nav__link">
  381. email address 2
  382. </a>
  383. </li>
  384. <li class="md-nav__item">
  385. <a href="#ip-address_1" class="md-nav__link">
  386. IP Address
  387. </a>
  388. </li>
  389. <li class="md-nav__item">
  390. <a href="#date-as-mmddyyyy-3" class="md-nav__link">
  391. Date as MM/DD/YYYY 3
  392. </a>
  393. </li>
  394. </ul>
  395. </nav>
  396. </li>
  397. </ul>
  398. </nav>
  399. </li>
  400. <li class="md-nav__item">
  401. <a href="menuize.html" class="md-nav__link">
  402. Attach the menus
  403. </a>
  404. </li>
  405. <li class="md-nav__item">
  406. <a href="wojson.html" class="md-nav__link">
  407. Custom Web pages w/o JSON
  408. </a>
  409. </li>
  410. </ul>
  411. </nav>
  412. </li>
  413. <li class="md-nav__item md-nav__item--nested">
  414. <input class="md-nav__toggle md-toggle" data-md-toggle="nav-10" type="checkbox" id="nav-10" >
  415. <label class="md-nav__link" for="nav-10">
  416. Appendix
  417. <span class="md-nav__icon md-icon"></span>
  418. </label>
  419. <nav class="md-nav" aria-label="Appendix" data-md-level="1">
  420. <label class="md-nav__title" for="nav-10">
  421. <span class="md-nav__icon md-icon"></span>
  422. Appendix
  423. </label>
  424. <ul class="md-nav__list" data-md-scrollfix>
  425. <li class="md-nav__item">
  426. <a href="lsbegin.html" class="md-nav__link">
  427. Inside AutoConnect::begin
  428. </a>
  429. </li>
  430. <li class="md-nav__item">
  431. <a href="credit.html" class="md-nav__link">
  432. Saved credentials access
  433. </a>
  434. </li>
  435. <li class="md-nav__item">
  436. <a href="acupload.html" class="md-nav__link">
  437. File upload handler
  438. </a>
  439. </li>
  440. <li class="md-nav__item">
  441. <a href="colorized.html" class="md-nav__link">
  442. Custom colorized
  443. </a>
  444. </li>
  445. <li class="md-nav__item">
  446. <a href="changelabel.html" class="md-nav__link">
  447. Change label text
  448. </a>
  449. </li>
  450. </ul>
  451. </nav>
  452. </li>
  453. <li class="md-nav__item">
  454. <a href="faq.html" class="md-nav__link">
  455. FAQ
  456. </a>
  457. </li>
  458. <li class="md-nav__item">
  459. <a href="changelog.html" class="md-nav__link">
  460. Change log
  461. </a>
  462. </li>
  463. <li class="md-nav__item">
  464. <a href="license.html" class="md-nav__link">
  465. License
  466. </a>
  467. </li>
  468. </ul>
  469. </nav>
  470. </div>
  471. </div>
  472. </div>
  473. <div class="md-sidebar md-sidebar--secondary" data-md-component="toc">
  474. <div class="md-sidebar__scrollwrap">
  475. <div class="md-sidebar__inner">
  476. <nav class="md-nav md-nav--secondary" aria-label="Table of contents">
  477. <label class="md-nav__title" for="__toc">
  478. <span class="md-nav__icon md-icon"></span>
  479. Table of contents
  480. </label>
  481. <ul class="md-nav__list" data-md-scrollfix>
  482. <li class="md-nav__item">
  483. <a href="#convert-autoconnectelements-value-to-actual-data-type" class="md-nav__link">
  484. Convert AutoConnectElements value to actual data type
  485. </a>
  486. <nav class="md-nav" aria-label="Convert AutoConnectElements value to actual data type">
  487. <ul class="md-nav__list">
  488. <li class="md-nav__item">
  489. <a href="#integer" class="md-nav__link">
  490. Integer
  491. </a>
  492. </li>
  493. <li class="md-nav__item">
  494. <a href="#float" class="md-nav__link">
  495. Float
  496. </a>
  497. </li>
  498. <li class="md-nav__item">
  499. <a href="#date-time" class="md-nav__link">
  500. Date &amp; Time
  501. </a>
  502. </li>
  503. <li class="md-nav__item">
  504. <a href="#ip-address" class="md-nav__link">
  505. IP address
  506. </a>
  507. </li>
  508. </ul>
  509. </nav>
  510. </li>
  511. <li class="md-nav__item">
  512. <a href="#validation-for-the-value" class="md-nav__link">
  513. Validation for the value
  514. </a>
  515. <nav class="md-nav" aria-label="Validation for the value">
  516. <ul class="md-nav__list">
  517. <li class="md-nav__item">
  518. <a href="#url" class="md-nav__link">
  519. URL
  520. </a>
  521. </li>
  522. <li class="md-nav__item">
  523. <a href="#dns-hostname" class="md-nav__link">
  524. DNS hostname
  525. </a>
  526. </li>
  527. <li class="md-nav__item">
  528. <a href="#email-address-2" class="md-nav__link">
  529. email address 2
  530. </a>
  531. </li>
  532. <li class="md-nav__item">
  533. <a href="#ip-address_1" class="md-nav__link">
  534. IP Address
  535. </a>
  536. </li>
  537. <li class="md-nav__item">
  538. <a href="#date-as-mmddyyyy-3" class="md-nav__link">
  539. Date as MM/DD/YYYY 3
  540. </a>
  541. </li>
  542. </ul>
  543. </nav>
  544. </li>
  545. </ul>
  546. </nav>
  547. </div>
  548. </div>
  549. </div>
  550. <div class="md-content">
  551. <article class="md-content__inner md-typeset">
  552. <h1>Tips for data conversion</h1>
  553. <h2 id="convert-autoconnectelements-value-to-actual-data-type">Convert AutoConnectElements value to actual data type<a class="headerlink" href="#convert-autoconnectelements-value-to-actual-data-type" title="Permanent link">&para;</a></h2>
  554. <p>The values in the AutoConnectElements field of the custom Web page are all typed as String. A sketch needs to be converted to an actual data type if the data type required for sketch processing is not a String type.</p>
  555. <p>The AutoConnect library does not provide the data conversion utility, and its function depends on Arduino language functions or functions of the type class. However, commonly used data conversion methods are generally similar.</p>
  556. <p>Here, represent examples the typical method for the data type conversion for the AutoConnectElements value of custom Web pages.</p>
  557. <h3 id="integer"><i class="fa fa-exchange"></i> Integer<a class="headerlink" href="#integer" title="Permanent link">&para;</a></h3>
  558. <p>Use <a href="https://www.arduino.cc/reference/en/language/variables/conversion/intcast/">int()</a> or <a href="https://www.arduino.cc/reference/en/language/variables/data-types/string/functions/toint/">toInt() of String</a>.</p>
  559. <p><div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">input</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">aux.getElement</span><span style="color: #f92672">&lt;</span><span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&gt;</span><span style="color: #f8f8f2">(</span><span style="color: #e6db74">&quot;INPUT&quot;</span><span style="color: #f8f8f2">);</span>
  560. <span style="color: #66d9ef">int</span> <span style="color: #f8f8f2">value</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">input.value.toInt();</span>
  561. </code></pre></div>
  562. You can shorten it and write as like:
  563. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #66d9ef">int</span> <span style="color: #f8f8f2">value</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">aux[</span><span style="color: #e6db74">&quot;INPUT&quot;</span><span style="color: #f8f8f2">].value.toInt();</span>
  564. </code></pre></div></p>
  565. <h3 id="float"><i class="fa fa-exchange"></i> Float<a class="headerlink" href="#float" title="Permanent link">&para;</a></h3>
  566. <p>Use <a href="https://www.arduino.cc/reference/en/language/variables/conversion/floatcast/">float()</a> or <a href="https://www.arduino.cc/reference/en/language/variables/data-types/string/functions/tofloat/">toFloat() of String</a>.</p>
  567. <p><div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">input</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">aux.getElement</span><span style="color: #f92672">&lt;</span><span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&gt;</span><span style="color: #f8f8f2">(</span><span style="color: #e6db74">&quot;INPUT&quot;</span><span style="color: #f8f8f2">);</span>
  568. <span style="color: #66d9ef">float</span> <span style="color: #f8f8f2">value</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">input.value.toFloat();</span>
  569. </code></pre></div>
  570. You can shorten it and write as like:
  571. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #66d9ef">float</span> <span style="color: #f8f8f2">value</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">aux[</span><span style="color: #e6db74">&quot;INPUT&quot;</span><span style="color: #f8f8f2">].value.toFloat();</span>
  572. </code></pre></div></p>
  573. <h3 id="date-time"><i class="fa fa-exchange"></i> Date &amp; Time<a class="headerlink" href="#date-time" title="Permanent link">&para;</a></h3>
  574. <p>The easiest way is to use the <a href="https://www.pjrc.com/teensy/td_libs_Time.html">Arduino Time Library</a>. Sketches must accommodate differences in date and time formats depending on the time zone. You can absorb the difference in DateTime format by using <code>sscanf</code> function.<sup id="fnref:1"><a class="footnote-ref" href="#fn:1">1</a></sup></p>
  575. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #75715e">#include</span> <span style="color: #75715e">&lt;TimeLib.h&gt;</span>
  576. <span style="color: #66d9ef">time_t</span> <span style="color: #f8f8f2">tm;</span>
  577. <span style="color: #66d9ef">int</span> <span style="color: #f8f8f2">Year,</span> <span style="color: #f8f8f2">Month,</span> <span style="color: #f8f8f2">Day,</span> <span style="color: #f8f8f2">Hour,</span> <span style="color: #f8f8f2">Minute,</span> <span style="color: #f8f8f2">Second;</span>
  578. <span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">input</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">aux.[</span><span style="color: #e6db74">&quot;INPUT&quot;</span><span style="color: #f8f8f2">].as</span><span style="color: #f92672">&lt;</span><span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&gt;</span><span style="color: #f8f8f2">();</span>
  579. <span style="color: #f8f8f2">sscanf(input.value.c_str(),</span> <span style="color: #e6db74">&quot;%d-%d-%d %d:%d:%d&quot;</span><span style="color: #f8f8f2">,</span> <span style="color: #f92672">&amp;</span><span style="color: #f8f8f2">Year,</span> <span style="color: #f92672">&amp;</span><span style="color: #f8f8f2">Month,</span> <span style="color: #f92672">&amp;</span><span style="color: #f8f8f2">Day,</span> <span style="color: #f92672">&amp;</span><span style="color: #f8f8f2">Hour,</span> <span style="color: #f92672">&amp;</span><span style="color: #f8f8f2">Minute,</span> <span style="color: #f92672">&amp;</span><span style="color: #f8f8f2">Second);</span>
  580. <span style="color: #f8f8f2">tm.Year</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">CalendarYrToTm(Year);</span>
  581. <span style="color: #f8f8f2">tm.Month</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">Month;</span>
  582. <span style="color: #f8f8f2">tm.Day</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">Day;</span>
  583. <span style="color: #f8f8f2">tm.Hour</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">Hour;</span>
  584. <span style="color: #f8f8f2">tm.Minute</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">Minute;</span>
  585. <span style="color: #f8f8f2">tm.Second</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">Second;</span>
  586. </code></pre></div>
  587. <h3 id="ip-address"><i class="fa fa-exchange"></i> IP address<a class="headerlink" href="#ip-address" title="Permanent link">&para;</a></h3>
  588. <p>To convert a String to an IP address, use <strong>IPAddress::fromString</strong>. To stringize an instance of an IP address, use <strong>IPAddress::toString</strong>.</p>
  589. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #f8f8f2">IPAddress</span> <span style="color: #f8f8f2">ip;</span>
  590. <span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">input</span> <span style="color: #f8f8f2">aux[</span><span style="color: #e6db74">&quot;INPUT&quot;</span><span style="color: #f8f8f2">].as</span><span style="color: #f92672">&lt;</span><span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&gt;</span><span style="color: #f8f8f2">();</span>
  591. <span style="color: #f8f8f2">ip.fromString(input.value);</span>
  592. <span style="color: #f8f8f2">input.value</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">ip.toString();</span>
  593. </code></pre></div>
  594. <h2 id="validation-for-the-value">Validation for the value<a class="headerlink" href="#validation-for-the-value" title="Permanent link">&para;</a></h2>
  595. <p>To convert input data correctly from the string, it must match its format. The validation implementation with sketches depends on various perspectives. Usually, the tiny devices have no enough power for the lexical analysis completely. But you can reduce the burden for data verification using the <a href="achandling.html#check-data-against-on-submission"><strong>pattern</strong></a> of AutoConnectInput.</p>
  596. <p>By giving a <a href="acelements.html#pattern">pattern</a> to <a href="apielements.html#pattern">AutoConnectInput</a>, you can find errors in data format while typing in custom Web pages. Specifying the input data rule as a <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions">regular expression</a> will validate the type match during input. If there is an error in the format during input, the background color of the field will change to pink. Refer to section <a href="achandling.html#check-data-against-on-submission"><em>Handling the custom Web pages</em></a>.</p>
  597. <p>However, input data will be transmitted even if the value does not match the pattern. Sketches require the validation of the received data. You can use the <a href="apielements.html#isvalid">AutoConnectInput::isValid</a> function to validate it. The isValid function validates whether the value member variable matches a pattern and returns true or false.</p>
  598. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #75715e">#include</span> <span style="color: #75715e">&lt;ESP8266WiFi.h&gt;</span>
  599. <span style="color: #75715e">#include</span> <span style="color: #75715e">&lt;ESP8266WebServer.h&gt;</span>
  600. <span style="color: #75715e">#include</span> <span style="color: #75715e">&lt;AutoConnect.h&gt;</span>
  601. <span style="color: #66d9ef">static</span> <span style="color: #66d9ef">const</span> <span style="color: #66d9ef">char</span> <span style="color: #f8f8f2">input_page[]</span> <span style="color: #f8f8f2">PROGMEM</span> <span style="color: #f92672">=</span> <span style="color: #e6db74">R&quot;raw(</span>
  602. <span style="color: #e6db74">[</span>
  603. <span style="color: #e6db74"> {</span>
  604. <span style="color: #e6db74"> &quot;title&quot;: &quot;IP Address&quot;,</span>
  605. <span style="color: #e6db74"> &quot;uri&quot;: &quot;/&quot;,</span>
  606. <span style="color: #e6db74"> &quot;menu&quot;: true,</span>
  607. <span style="color: #e6db74"> &quot;element&quot;: [</span>
  608. <span style="color: #e6db74"> {</span>
  609. <span style="color: #e6db74"> &quot;name&quot;: &quot;ipaddress&quot;,</span>
  610. <span style="color: #e6db74"> &quot;type&quot;: &quot;ACInput&quot;,</span>
  611. <span style="color: #e6db74"> &quot;label&quot;: &quot;IP Address&quot;,</span>
  612. <span style="background-color: #49483e"><span style="color: #e6db74"> &quot;pattern&quot;: &quot;^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$&quot;</span>
  613. </span><span style="color: #e6db74"> },</span>
  614. <span style="color: #e6db74"> {</span>
  615. <span style="color: #e6db74"> &quot;name&quot;: &quot;send&quot;,</span>
  616. <span style="color: #e6db74"> &quot;type&quot;: &quot;ACSubmit&quot;,</span>
  617. <span style="color: #e6db74"> &quot;value&quot;: &quot;SEND&quot;,</span>
  618. <span style="color: #e6db74"> &quot;uri&quot;: &quot;/check&quot;</span>
  619. <span style="color: #e6db74"> }</span>
  620. <span style="color: #e6db74"> ]</span>
  621. <span style="color: #e6db74"> },</span>
  622. <span style="color: #e6db74"> {</span>
  623. <span style="color: #e6db74"> &quot;title&quot;: &quot;IP Address&quot;,</span>
  624. <span style="color: #e6db74"> &quot;uri&quot;: &quot;/check&quot;,</span>
  625. <span style="color: #e6db74"> &quot;menu&quot;: false,</span>
  626. <span style="color: #e6db74"> &quot;element&quot;: [</span>
  627. <span style="color: #e6db74"> {</span>
  628. <span style="color: #e6db74"> &quot;name&quot;: &quot;result&quot;,</span>
  629. <span style="color: #e6db74"> &quot;type&quot;: &quot;ACText&quot;</span>
  630. <span style="color: #e6db74"> }</span>
  631. <span style="color: #e6db74"> ]</span>
  632. <span style="color: #e6db74"> }</span>
  633. <span style="color: #e6db74">]</span>
  634. <span style="color: #e6db74">)raw&quot;</span><span style="color: #f8f8f2">;</span>
  635. <span style="color: #f8f8f2">AutoConnect</span> <span style="color: #f8f8f2">portal;</span>
  636. <span style="color: #f8f8f2">String</span> <span style="color: #a6e22e">checkIPAddress</span><span style="color: #f8f8f2">(AutoConnectAux</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">aux,</span> <span style="color: #f8f8f2">PageArgument</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">args)</span> <span style="color: #f8f8f2">{</span>
  637. <span style="color: #f8f8f2">AutoConnectAux</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">input_page</span> <span style="color: #f92672">=</span> <span style="color: #f92672">*</span><span style="color: #f8f8f2">portal.aux(</span><span style="color: #e6db74">&quot;/&quot;</span><span style="color: #f8f8f2">);</span>
  638. <span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">ipaddress</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">input_page[</span><span style="color: #e6db74">&quot;ipaddress&quot;</span><span style="color: #f8f8f2">].as</span><span style="color: #f92672">&lt;</span><span style="color: #f8f8f2">AutoConnectInput</span><span style="color: #f92672">&gt;</span><span style="color: #f8f8f2">();</span>
  639. <span style="color: #f8f8f2">AutoConnectText</span><span style="color: #f92672">&amp;</span> <span style="color: #f8f8f2">result</span> <span style="color: #f92672">=</span> <span style="color: #f8f8f2">aux[</span><span style="color: #e6db74">&quot;result&quot;</span><span style="color: #f8f8f2">].as</span><span style="color: #f92672">&lt;</span><span style="color: #f8f8f2">AutoConnectText</span><span style="color: #f92672">&gt;</span><span style="color: #f8f8f2">();</span>
  640. <span style="background-color: #49483e"> <span style="color: #66d9ef">if</span> <span style="color: #f8f8f2">(ipaddress.isValid())</span> <span style="color: #f8f8f2">{</span>
  641. </span> <span style="color: #f8f8f2">result.value</span> <span style="color: #f92672">=</span> <span style="color: #e6db74">&quot;IP Address &quot;</span> <span style="color: #f92672">+</span> <span style="color: #f8f8f2">ipaddress.value</span> <span style="color: #f92672">+</span> <span style="color: #e6db74">&quot; is OK.&quot;</span><span style="color: #f8f8f2">;</span>
  642. <span style="color: #f8f8f2">result.style</span> <span style="color: #f92672">=</span> <span style="color: #e6db74">&quot;&quot;</span><span style="color: #f8f8f2">;</span>
  643. <span style="color: #f8f8f2">}</span>
  644. <span style="color: #66d9ef">else</span> <span style="color: #f8f8f2">{</span>
  645. <span style="color: #f8f8f2">result.value</span> <span style="color: #f92672">=</span> <span style="color: #e6db74">&quot;IP Address &quot;</span> <span style="color: #f92672">+</span> <span style="color: #f8f8f2">ipaddress.value</span> <span style="color: #f92672">+</span> <span style="color: #e6db74">&quot; error.&quot;</span><span style="color: #f8f8f2">;</span>
  646. <span style="color: #f8f8f2">result.style</span> <span style="color: #f92672">=</span> <span style="color: #e6db74">&quot;color:red;&quot;</span><span style="color: #f8f8f2">;</span>
  647. <span style="color: #f8f8f2">}</span>
  648. <span style="color: #66d9ef">return</span> <span style="color: #f8f8f2">String(</span><span style="color: #e6db74">&quot;&quot;</span><span style="color: #f8f8f2">);</span>
  649. <span style="color: #f8f8f2">}</span>
  650. <span style="color: #66d9ef">void</span> <span style="color: #a6e22e">setup</span><span style="color: #f8f8f2">()</span> <span style="color: #f8f8f2">{</span>
  651. <span style="color: #f8f8f2">portal.load(input_page);</span>
  652. <span style="color: #f8f8f2">portal.on(</span><span style="color: #e6db74">&quot;/check&quot;</span><span style="color: #f8f8f2">,</span> <span style="color: #f8f8f2">checkIPAddress);</span>
  653. <span style="color: #f8f8f2">portal.begin();</span>
  654. <span style="color: #f8f8f2">}</span>
  655. <span style="color: #66d9ef">void</span> <span style="color: #a6e22e">loop</span><span style="color: #f8f8f2">()</span> <span style="color: #f8f8f2">{</span>
  656. <span style="color: #f8f8f2">portal.handleClient();</span>
  657. <span style="color: #f8f8f2">}</span>
  658. </code></pre></div>
  659. <div class="admonition caution">
  660. <p class="admonition-title">Regular Expressions for JavaScript</p>
  661. <p>Regular expressions specified in the AutoConnectInput pattern conforms to the <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions">JavaScript specification</a>.</p>
  662. </div>
  663. <p>Here, represent examples the typical regular expression for the input validation.</p>
  664. <h3 id="url"><img src="images/regexp.png" align="top"> URL<a class="headerlink" href="#url" title="Permanent link">&para;</a></h3>
  665. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #f8f8f2">^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$</span>
  666. </code></pre></div>
  667. <h3 id="dns-hostname"><img src="images/regexp.png" align="top"> DNS hostname<a class="headerlink" href="#dns-hostname" title="Permanent link">&para;</a></h3>
  668. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #f8f8f2">^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])$</span>
  669. </code></pre></div>
  670. <h3 id="email-address-2"><img src="images/regexp.png" align="top"> email address <sup id="fnref:2"><a class="footnote-ref" href="#fn:2">2</a></sup><a class="headerlink" href="#email-address-2" title="Permanent link">&para;</a></h3>
  671. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #f8f8f2">^[a-zA-Z0-9.!</span><span style="color: #75715e">#$%&amp;&#39;*+\/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$</span>
  672. </code></pre></div>
  673. <h3 id="ip-address_1"><img src="images/regexp.png" align="top"> IP Address<a class="headerlink" href="#ip-address_1" title="Permanent link">&para;</a></h3>
  674. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #f8f8f2">^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$</span>
  675. </code></pre></div>
  676. <h3 id="date-as-mmddyyyy-3"><img src="images/regexp.png" align="top"> Date as MM/DD/YYYY <sup id="fnref:3"><a class="footnote-ref" href="#fn:3">3</a></sup><a class="headerlink" href="#date-as-mmddyyyy-3" title="Permanent link">&para;</a></h3>
  677. <div class="highlight" style="background: #272822"><pre style="line-height: 125%; margin: 0;"><span></span><code><span style="color: #f8f8f2">^(0[1-9]|1[012])[-</span> <span style="color: #f8f8f2">\/.](0[1-9]|[12][0-9]|3[01])[-</span> <span style="color: #f8f8f2">\/.](19|20)\d\d$</span>
  678. </code></pre></div>
  679. <div class="admonition caution">
  680. <p class="admonition-title">Contain with backquote</p>
  681. <p>If that regular expression contains a backquote it must be escaped by backquote duplication.</p>
  682. </div>
  683. <div class="footnote">
  684. <hr />
  685. <ol>
  686. <li id="fn:1">
  687. <p>The ssanf library function cannot be used with the old Arduino core.&#160;<a class="footnote-backref" href="#fnref:1" title="Jump back to footnote 1 in the text">&#8617;</a></p>
  688. </li>
  689. <li id="fn:2">
  690. <p>This regular expression does not fully support the format of the e-mail address requested in <a href="https://tools.ietf.org/html/rfc5322">RFC5322</a>.&#160;<a class="footnote-backref" href="#fnref:2" title="Jump back to footnote 2 in the text">&#8617;</a></p>
  691. </li>
  692. <li id="fn:3">
  693. <p>This regular expression does not consider semantic constraints. It is not possible to detect errors that do not exist as actual dates.&#160;<a class="footnote-backref" href="#fnref:3" title="Jump back to footnote 3 in the text">&#8617;</a></p>
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