{"id":1360,"date":"2020-05-19T13:00:32","date_gmt":"2020-05-19T11:00:32","guid":{"rendered":"https:\/\/carontestudio.com\/blog\/?p=1360"},"modified":"2022-10-18T18:21:56","modified_gmt":"2022-10-18T16:21:56","slug":"instalar-recaptcha-sin-plugin","status":"publish","type":"post","link":"https:\/\/carontestudio.com\/blog\/instalar-recaptcha-sin-plugin\/","title":{"rendered":"Instalar reCAPTCHA sin plugin"},"content":{"rendered":"\n<p>Te encuentras ya aburrido de recibir <strong>SPAM <\/strong>en tu correo electr\u00f3nico, y descubres que en tu nueva y flamante web tambi\u00e9n recibes estos inc\u00f3modos comentarios. \u00bfQuieres saber c\u00f3mo <strong>dejar de recibir SPAM<\/strong> de tus formularios de contacto? En esta mini gu\u00eda voy a ense\u00f1arte como aprovechar las herramientas que Google ha desarrollado para este fin, y tambi\u00e9n a instalar reCAPTCHA de una manera sencilla. \u00a1Empezamos!<\/p>\n\n\n\n<!--more-->\n\n\n\n<h2 class=\"wp-block-heading\">Que es Google reCAPTCHA<\/h2>\n\n\n\n<p>Si acabas de poner un formulario de contacto en tu web o si ya lo ten\u00edas funcionando desde hace tiempo, seguro que no paras de recibir correo basura y contactos \u00abficticios\u00bb que no te aportan ning\u00fan valor. <\/p>\n\n\n\n<p>Este tipo de <strong>SPAM <\/strong>o <strong>correo basura<\/strong> lo crean unos bots que tienen como \u00fanico cometido, rastrear la web buscando direcciones de email a los que poder mandar publicidad, campa\u00f1as de venta de productos fraudulentos o timos, e incluso peor a\u00fan, ficheros y estrategias de <strong><a rel=\"noreferrer noopener\" aria-label=\"phishing (abre en una nueva pesta\u00f1a)\" href=\"https:\/\/es.wikipedia.org\/wiki\/Phishing\" target=\"_blank\">phishing<\/a><\/strong>. <\/p>\n\n\n\n<p>Para tratar de aliviar este problema Google cre\u00f3 en torno al a\u00f1o 2009, (o m\u00e1s bien compr\u00f3 la empresa que lo desarroll\u00f3 inicialmente) un sistema que era capaz de discernir si el ordenador, que estaba interactuando con la web, era un bot o un ser humano. Este sistema se llam\u00f3 <strong>Google reCAPTCHA<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">reCAPTCHA v2<\/h3>\n\n\n\n<p>Posteriormente sobre el a\u00f1o 2014 Google lanz\u00f3 la segunda versi\u00f3n del software. No se complicaron con el nombre y pas\u00f3 a llamarse Google reCAPTCHA v2.  El software era una evoluci\u00f3n del anterior y, a\u00fan a d\u00eda de hoy, es de los m\u00e1s usados en la internet. El software usa un algoritmo secreto para analizar el comportamiento del usuario\/bot. Entre otros, el algoritmo revisa las cookies instaladas y activas en tu navegador, e incluso la direcci\u00f3n IP para verificar el comportamiento a trav\u00e9s de Internet. Este algoritmo hace de Google reCAPTCHA v2 <strong>un sistema muy fiable para dejar de recibir SPAM<\/strong>.<\/p>\n\n\n\n<div class=\"wp-block-columns has-2-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/a\/ad\/RecaptchaLogo.svg\/1200px-RecaptchaLogo.svg.png\" alt=\"ReCAPTCHA - Wikipedia, la enciclopedia libre\" width=\"75%\" height=\"auto\"\/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\"> reCAPTCHA v3<\/h3>\n\n\n\n<p>Hace menos de 2 a\u00f1os (octubre de 2018), Google lanz\u00f3 la tercera versi\u00f3n de su software anti bots. El principal objetivo que se marc\u00f3 Google con esta versi\u00f3n, fue la de minimizar la interacci\u00f3n necesaria del usuario para verificar si se trata de un bot o no. Es decir, buscaban un sistema anti spam o anti bots <strong>totalmente transparente e inocuo para los visitantes reales<\/strong>. <\/p>\n\n\n\n<p>El sistema introduce como novedad un <strong>an\u00e1lisis de riesgos de los visitantes<\/strong> y elabora distintos perfiles o escalas de riesgo. A cada visita le asigna una puntuaci\u00f3n diferente, clasific\u00e1ndolos desde el 0.0 al 1.0 en orden de probabilidad de ser un bot o un humano. Al igual que en la reCAPTCHA v2, Google reCaptcha v3 se fija en diferentes tipos de interacciones del usuario a trav\u00e9s de su navegaci\u00f3n por internet, para determinar si es un bot o no.<\/p>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Instalar reCAPTCHA<\/h2>\n\n\n\n<p>Si tienes una web montada en WordPress es relativamente sencillo instalar medidas para dejar de recibir <strong>SPAM<\/strong>. Pero, \u00bfy si no tienes WordPress? A continuaci\u00f3n te ense\u00f1ar\u00e9 c\u00f3mo instalarlo directamente en tu c\u00f3digo HTML y PHP. <\/p>\n\n\n\n<p>El proceso es semejante al de <a href=\"https:\/\/carontestudio.com\/blog\/instalar-google-analytics-guia-util-2020\/\">instalar Google Analytics<\/a>: Hay que crear una cuenta e insertar un c\u00f3digo en nuestra p\u00e1gina. Voy a mostrarte c\u00f3mo en 3 sencillos pasos podr\u00e1s instalar este sistema antispam en tu web. Lo primero que debes hacer es darte de alta en Google reCAPTCHA.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Darse de alta en Google reCAPTCHA<\/h3>\n\n\n\n<p>Para ello entra en la <a rel=\"noreferrer noopener\" aria-label=\"p\u00e1gina de registro de Google reCAPTCHA (abre en una nueva pesta\u00f1a)\" href=\"https:\/\/www.google.com\/recaptcha\/intro\/v3.html\" target=\"_blank\">p\u00e1gina de registro de Google reCAPTCHA<\/a>. En ella podr\u00e1s registrarte y crear un nuevo proyecto. Ver\u00e1s una pantalla similar a esta:<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image is-resized text-center\"><img loading=\"lazy\" decoding=\"async\" width=\"895\" height=\"906\" src=\"https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image.png\" alt=\"Instalar recaptcha\" class=\"wp-image-1390\" srcset=\"https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image.png 895w, https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image-296x300.png 296w, https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image-768x777.png 768w\" sizes=\"auto, (max-width: 895px) 100vw, 895px\" \/><\/figure>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>En esta pantalla, lo primero que tienes que hacer, es registrar el nuevo sitio web donde quieres implementar el reCAPTCHA. Luego debes elegir que versi\u00f3n quieres (v2 o v3) y a continuaci\u00f3n indicar el dominio d\u00f3nde ir\u00e1 instalado. Por \u00faltimo aceptas las condiciones de Google, si as\u00ed lo decides, y a continuaci\u00f3n se mostrar\u00e1 una pantalla donde Google te da dos claves: La clave de tu sitio web y la clave cifrada. Gu\u00e1rdalas bien porque las necesitar\u00e1s m\u00e1s adelante. <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"546\" src=\"https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image-2-1024x546.png\" alt=\"instalar recaptcha sin plugin\" class=\"wp-image-1394\" srcset=\"https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image-2-1024x546.png 1024w, https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image-2-300x160.png 300w, https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image-2-768x410.png 768w, https:\/\/carontestudio.com\/blog\/wp-content\/uploads\/2020\/05\/image-2.png 1063w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Instalar Google reCAPTCHA v2<\/h3>\n\n\n\n<p>Una vez has registrado tu sitio y generado las claves tienes que ir a tu c\u00f3digo HTML. Concretamente al &lt;head&gt;. Ah\u00ed debes introducir la siguiente llamada a la librer\u00eda JavaScript de Google:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;script src='https:\/\/www.google.com\/recaptcha\/api.js'&gt;&lt;\/script&gt;<\/code><\/pre>\n\n\n\n<p>Acto seguido, debes a\u00f1adir tu <strong>clave de sitio<\/strong> dentro de tu formulario. Es decir, dentro de las etiquetas &lt;form&gt; y &lt;\/form&gt;, debes a\u00f1adir el siguiente codigo:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;div class=\"g-recaptcha\" data-sitekey=\"API_KEY\"&gt;&lt;\/div&gt;<\/code><\/pre>\n\n\n\n<p>Donde pone \u00abAPI KEY\u00bb debes poner la clave de tu sitio web que has obtenido anteriormente al registrar tu p\u00e1gina en Google reCAPTCHA.<\/p>\n\n\n\n<p>Por \u00faltimo debes ir al php de tu formulario e introducir el siguiente c\u00f3digo de ejemplo. Donde pone \u00abAPI_SECRET\u00bb debes introducir la clave secreta que te proporcion\u00f3 Google:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n\t$name = stripslashes($_POST&#91;\"name\"]);\n\t$email = stripslashes($_POST&#91;\"email\"]);\n\t$message = stripslashes($_POST&#91;\"message\"]);\n \n\t$recaptcha = $_POST&#91;\"g-recaptcha-response\"];\n \n\t$url = 'https:\/\/www.google.com\/recaptcha\/api\/siteverify';\n\t$data = array(\n\t\t'header' =&gt; \"Content-Type: application\/x-www-form-urlencoded\\r\\n\", \n\t\t'secret' =&gt; 'API_SECRET',\n\t\t'response' =&gt; $recaptcha\n\t);\n\t$options = array(\n\t\t'http' =&gt; array (\n\t\t\t'method' =&gt; 'POST',\n\t\t\t'content' =&gt; http_build_query($data)\n\t\t)\n\t);\n\t$context  = stream_context_create($options);\n\t$verify = file_get_contents($url, false, $context);\n\t$captcha_success = json_decode($verify);\n\tif ($captcha_success-&gt;success) {\n\t\t\/\/ No eres un robot, continuamos con el env\u00edo del email\n\t\t\/\/ ...\n\t\t\/\/ ...\n\t} else {\n\t\t\/\/ Eres un robot!\n\t}\n?&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"> Instalar Google reCAPTCHA v3<\/h3>\n\n\n\n<p>Igual que en caso anterior, lo primero que debes hacer es introducir en tu HTML el siguiente c\u00f3digo dentro de las etiquetas &lt;head&gt;. Sustituye \u00abCLAVE_PUBLICA\u00bb por tu clave de sitio web proporcionada por Google al realizar el registro.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;script src='https:\/\/www.google.com\/recaptcha\/api.js?render=CLAVE_PUBLICA'&gt; \n&lt;\/script&gt;\n&lt;script&gt;\ngrecaptcha.ready(function() {\ngrecaptcha.execute('CLAVE_PUBLICA', {action: 'formulario'})\n.then(function(token) {\nvar recaptchaResponse = document.getElementById('recaptchaResponse');\nrecaptchaResponse.value = token;\n});});\n&lt;\/script&gt;<\/code><\/pre>\n\n\n\n<p>Acto seguido, tienes que a\u00f1adir un \u00abinput\u00bb al formulario HTML. El c\u00f3digo es el siguiente: <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;input type=\"hidden\" name=\"recaptcha_response\" id=\"recaptchaResponse\"&gt;<\/code><\/pre>\n\n\n\n<p>Para finalizar, debes acceder al PHP donde se resuelve el formulario HTML. Dentro introduce el siguiente c\u00f3digo y cambia nuevamente donde dice \u00abCLAVE_PRIVADA\u00bb por tu clave secreta. Si te fijas en el c\u00f3digo ver\u00e1s un \u00abscore\u00bb que debe ser igual o mayor que 0.7. Subiendo o bajando este valor aumentar\u00e1s la severidad del filtro.  <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$recaptcha_url = 'https:\/\/www.google.com\/recaptcha\/api\/siteverify'; \n$recaptcha_secret = 'CLAVE_PRIVADA'; \n$recaptcha_response = $_POST&#91;'recaptcha_response']; \n$recaptcha = file_get_contents($recaptcha_url . '?secret=' . $recaptcha_secret . '&amp;response=' . $recaptcha_response); \n$recaptcha = json_decode($recaptcha); \n\nif($recaptcha-&gt;score &gt;= 0.7){\n    \/\/ OK. ERES HUMANO, EJECUTA ESTE C\u00d3DIGO\n}else{\n    \/\/ KO. ERES ROBOT, EJECUTA ESTE C\u00d3DIGO\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusi\u00f3n<\/h2>\n\n\n\n<p>Si est\u00e1s cansado de recibir numerosos mensajes basura en tus formularios, la herramienta de Google es una muy buena soluci\u00f3n para dejar de recibirlos. Como has visto, la instalaci\u00f3n no requiere m\u00e1s de 15 o 20 minutos. Si necesitaras ayuda o asesoramiento profesional para la <a href=\"https:\/\/carontestudio.com\/diseno-web\/diseno-web-vitoria\">creaci\u00f3n de tu sitio web<\/a>, como siempre, puedes contar con nosotros. <\/p>\n\n\n\n<p>Si te ha gustado este art\u00edculo o tienes alguna sugerencia, puedes dejarme un comentario. \u00a1Hasta la pr\u00f3xima!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Te encuentras ya aburrido de recibir SPAM en tu correo electr\u00f3nico, y descubres que en tu nueva y flamante web tambi\u00e9n recibes estos inc\u00f3modos comentarios. \u00bfQuieres saber c\u00f3mo dejar de recibir SPAM de tus formularios? Aqu\u00ed voy a ense\u00f1arte a aprovechar las herramientas que Google ha desarrollado para este fin. \u00a1Empezamos!<\/p>\n","protected":false},"author":4,"featured_media":1414,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[50],"tags":[],"class_list":["post-1360","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programacion-web"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u26d4 Instalar reCAPTCHA sin plugin | Caronte Web Studio<\/title>\n<meta name=\"description\" content=\"Tienes una web y est\u00e1s cansado de recibir \u26d4 SPAM. 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