Stop guessing what′s working and start seeing it for yourself.
Anmelden oder registrieren
Q&A
Question Center →

Semalt Expert define los pasos para raspar web con Javascript usando Jquery y Regex

Si bien es fácil usar jQuery para obtener datos de la API de un sitio web, no todos los sitios tienen una API pública que puede simplemente obtener la información que necesita. Por esta razón, es posible que desee encontrar la siguiente opción que es eliminación web. Aquí está el proceso de utilizar el web scrapping del lado del cliente con JavaScript utilizando jQuery y Regex. El raspado web en realidad hace innecesario utilizar las API del sitio web ya que obtiene todos los datos que desea. Para las API, es posible que deba iniciar sesión, lo que puede facilitar su localización.

Usando la solicitud de jQuery .get, tome el HTML de página completa. El código fuente de la página completa se registrará en la consola. Puede obtener un error en esta etapa de denegación de acceso, pero no debe preocuparse ya que hay una solución. El código solicita la página como lo haría un navegador, pero en lugar de mostrar la página, obtienes el código HTML.

El rendimiento puede no ser directamente lo que desea, pero la información está en el código que ha captado. Para obtener los datos que desea, use el método jQuery como .find (). Para cargar toda la página en scripts externos, fuentes y hojas de estilo, convierta la respuesta en un objeto jQuery. Sin embargo, es posible que solo necesite algunos bits de datos y no toda la página y los datos externos. Usa Regex para buscar patrones de guiones en el texto y eliminarlos. Aún así, puede usar Regex para seleccionar los datos que le interesan.

Regex es importante para hacer coincidir todos los tipos de patrones en cadenas y para buscar datos en la respuesta. Con el uso del código Regex generado anteriormente, puede quitar cualquier formato de archivo de datos. será mucho más fácil si la información que necesita está en texto sin formato.

Retos que podría enfrentar y cómo manejarlos

Compartir recursos de origen cruzado (CORS) es un verdadero desafío dentro del cliente La eliminación de contenido web está restringida ya que se considera ilegal en algunos casos. Por razones de seguridad, las solicitudes HTTP de origen cruzado desde dentro de los scripts están restringidas, lo que produce el error CORS. Mediante el uso de herramientas de dominio cruzado como todos los originales. Origen cruzado, Cualquier origen, Cualquier origen y otros, puede lograr su objetivo.

Otro problema que puede enfrentar es la limitación de velocidad. Aunque la mayoría de los sitios web públicos no tienen más que Captcha como defensa contra automatización acceso, es posible que se encuentre con un sitio que tiene límites de frecuencia. Aquí puede usar varios IPs para superar la limitación.

Algunos sitios tienen un software destinado a detener web raspadores. Dependiendo de cuán fuertes sean, puedes encontrarte en un desastre. Es posible que tenga que buscar cierta información para evitar problemas.

Se permiten algunos recursos de un dominio foráneo para sitios que permiten el intercambio cruzado de origen, incluidas hojas de estilo CSS, imágenes y scripts, video, audio, complementos, fuentes y marcos.

Los tres pasos pueden ayudarlo  eliminar datos  de cualquier sitio web:

I. Usar JavaScript del lado del cliente.

II. Usa jQuery para raspar datos.

III. Use Regex para filtrar los datos de la información requerida.

Max Bell
Thank you all for taking the time to read my article! I'm glad you found it helpful!
Michael Rodriguez
Great article, Max! I've been looking for a way to scrape web data using JavaScript, and your explanation with jQuery and Regex is fantastic. Thank you!
Max Bell
Thank you, Michael! I appreciate your kind words. If you have any questions or need further assistance, feel free to ask!
Laura Thompson
I really enjoyed reading your article, Max. It's well-written and easy to follow. Scraping web data can be a bit overwhelming, but your guide made it seem approachable. Thank you!
Max Bell
Thank you, Laura! I'm glad you found it approachable. I tried to break down the steps and make it as straightforward as possible. Let me know if you have any questions!
Daniel Adams
Great article, Max! I really appreciate the detailed explanation and the use of jQuery. It makes web scraping a lot more efficient. Thank you!
Max Bell
Thank you, Daniel! I completely agree, utilizing jQuery can definitely simplify and streamline the web scraping process. If you have any questions or need further assistance, feel free to ask!
Sophia Martinez
Max, thank you for this article! Scraping web data has always been a challenge for me, but your step-by-step guide using JavaScript, jQuery, and Regex is a game-changer. I can't wait to try it out!
Max Bell
You're welcome, Sophia! I'm thrilled to hear that you found it helpful. Feel free to reach out if you need any assistance while trying it out. Good luck!
Andrew Peterson
Excellent article, Max! I've been searching for an efficient way to scrape web data, and your approach using JavaScript, jQuery, and Regex seems perfect. Thank you for sharing!
Max Bell
Thank you, Andrew! I'm glad you found it to be a suitable approach for web scraping. If you have any questions or need further guidance, feel free to ask!
Emily Davis
Max, your article on web scraping using JavaScript, jQuery, and Regex is fantastic. The examples you provided really helped me understand the process better. Thank you so much for sharing your expertise!
Max Bell
Thank you, Emily! I'm delighted to hear that the examples aided your understanding. If you need any clarification or have further questions, feel free to ask!
David Evans
Great article, Max! Your explanation of scraping web data using JavaScript, jQuery, and Regex is precise and informative. Thanks for sharing your knowledge!
Max Bell
Thank you, David! I'm glad you found the explanation precise and informative. If you have any questions or need further assistance, feel free to ask!
Olivia Wilson
Max, I really enjoyed your article on web scraping with JavaScript, jQuery, and Regex. The step-by-step instructions make it easy to follow, even for beginners like me. Thank you for sharing!
Max Bell
Thank you, Olivia! I'm thrilled to hear that the step-by-step instructions were helpful, even for beginners. Don't hesitate to reach out if you have any questions or need further guidance!
Ethan Collins
Max, your article on scraping web data with JavaScript, jQuery, and Regex is incredibly informative. The examples you provided really clarified the process. Thank you for sharing your insights!
Max Bell
Thank you, Ethan! I'm glad the examples were able to clarify the process. If you have any questions or need further clarification, feel free to ask!
Maria Hernandez
Max, this article on web scraping with JavaScript, jQuery, and Regex is just what I needed. Your clear explanations and examples have made it seem much more approachable. Thank you for sharing your expertise!
Max Bell
You're welcome, Maria! I'm thrilled to hear that the clear explanations and examples made the topic more approachable for you. If you have any questions or need further assistance, feel free to ask!
Benjamin White
Excellent article, Max! Your guide on scraping web data using JavaScript, jQuery, and Regex is incredibly detailed and easy to understand. Thank you for sharing your knowledge!
Max Bell
Thank you, Benjamin! I'm glad you found the guide detailed and easy to understand. If you have any questions or need further guidance, feel free to ask!
Natalie Clark
Max, your article on web scraping with JavaScript, jQuery, and Regex is exceptional. The step-by-step instructions and code examples provided a clear understanding of the process. Thank you for sharing!
Max Bell
Thank you, Natalie! I'm delighted to hear that you found the step-by-step instructions and code examples helpful. If you need any further assistance, feel free to ask!
William Lee
Great article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is concise and informative. Thank you for sharing your expertise!
Max Bell
Thank you, William! I'm glad you found the explanation concise and informative. If you have any questions or need further assistance, feel free to ask!
Ava Lewis
Max, your article on web scraping with JavaScript, jQuery, and Regex is incredibly helpful. The detailed steps make it easy to follow. Thank you for sharing your knowledge!
Max Bell
Thank you, Ava! I'm thrilled to hear that you found the detailed steps helpful. If you need any further assistance or have any questions, feel free to ask!
Oliver Turner
Max, your article on scraping web data using JavaScript, jQuery, and Regex is outstanding. The use of Regex to extract specific data is really impressive. Thank you for sharing!
Max Bell
Thank you, Oliver! I'm glad you found the use of Regex impressive. It's a powerful tool for extracting specific data. If you have any questions or need further assistance, feel free to ask!
Emily Thompson
Great article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is thorough and easy to understand. Thank you for sharing your expertise!
Max Bell
Thank you, Emily! I'm glad you found the explanation thorough and easy to understand. If you have any questions or need further guidance, feel free to ask!
Henry Harris
Max, your article on web scraping with JavaScript, jQuery, and Regex is fantastic. The way you explained the steps with examples made it easy to follow. Thank you for sharing your knowledge!
Max Bell
Thank you, Henry! I'm thrilled to hear that the explanation with examples made the steps easy to follow. If you have any questions or need further assistance, feel free to ask!
Julia Green
Max, your article on web scraping with JavaScript, jQuery, and Regex is excellent. The use of jQuery simplifies the process. Thank you for sharing your expertise!
Max Bell
Thank you, Julia! I completely agree, the use of jQuery simplifies the web scraping process. If you have any questions or need further guidance, feel free to ask!
Lucas King
Great article, Max! Your step-by-step guide on web scraping using JavaScript, jQuery, and Regex is really helpful. Thank you for sharing your knowledge!
Max Bell
Thank you, Lucas! I'm glad you found the step-by-step guide helpful. If you have any questions or need further assistance, feel free to ask!
Ella Brooks
Max, your article on scraping web data with JavaScript, jQuery, and Regex is fantastic. The examples provide a clear understanding of the process. Thank you for sharing your expertise!
Max Bell
Thank you, Ella! I'm thrilled to hear that the examples provided a clear understanding of the process. If you have any questions or need further clarification, feel free to ask!
Liam Lewis
Excellent article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is thorough and concise. Thank you for sharing your knowledge!
Max Bell
Thank you, Liam! I'm glad you found the explanation thorough and concise. If you have any questions or need further guidance, feel free to ask!
Evelyn Turner
Max, your article on web scraping with JavaScript, jQuery, and Regex is excellent. The step-by-step guide is really helpful. Thank you for sharing your expertise!
Max Bell
Thank you, Evelyn! I'm delighted to hear that you found the step-by-step guide helpful. If you have any questions or need further assistance, feel free to ask!
Alexander Allen
Max, your article on web scraping with JavaScript, jQuery, and Regex is outstanding. The use of Regex to extract specific data is incredibly powerful. Thank you for sharing!
Max Bell
Thank you, Alexander! I'm glad you found the use of Regex powerful. It's a valuable tool for extracting specific data. If you have any questions or need further assistance, feel free to ask!
Grace Clark
Great article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is concise and informative. Thank you for sharing your knowledge!
Max Bell
Thank you, Grace! I'm glad you found the explanation concise and informative. If you have any questions or need further guidance, feel free to ask!
Mason Bailey
Max, your article on web scraping with JavaScript, jQuery, and Regex is fantastic. The examples provided a clear understanding of the process. Thank you for sharing your expertise!
Max Bell
Thank you, Mason! I'm thrilled to hear that the examples provided a clear understanding of the process. If you have any questions or need further clarification, feel free to ask!
Scarlett Walker
Max, your article on scraping web data using JavaScript, jQuery, and Regex is excellent. The step-by-step instructions make it easy to follow. Thank you for sharing your knowledge!
Max Bell
Thank you, Scarlett! I'm glad you found the step-by-step instructions easy to follow. If you have any questions or need further assistance, feel free to ask!
Jackson Hughes
Max, this article on web scraping with JavaScript, jQuery, and Regex is incredibly helpful. The clear explanations and code examples make it seem less daunting. Thank you for sharing your expertise!
Max Bell
You're welcome, Jackson! I'm thrilled to hear that the clear explanations and code examples made the topic less daunting for you. If you have any questions or need further assistance, feel free to ask!
Abigail Martinez
Max, your article on web scraping with JavaScript, jQuery, and Regex is fantastic. The step-by-step instructions and explanation are very insightful. Thank you for sharing your knowledge!
Max Bell
Thank you, Abigail! I'm glad you found the step-by-step instructions and explanation insightful. If you have any questions or need further guidance, feel free to ask!
Daniel Ward
Great article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is thorough and easy to understand. Thank you for sharing your expertise!
Max Bell
Thank you, Daniel! I'm glad you found the explanation thorough and easy to understand. If you have any questions or need further assistance, feel free to ask!
Audrey Foster
Max, your article on web scraping with JavaScript, jQuery, and Regex is outstanding. The use of jQuery provides a streamlined approach. Thank you for sharing your expertise!
Max Bell
Thank you, Audrey! I completely agree, jQuery streamlines the web scraping process. If you have any questions or need further guidance, feel free to ask!
Julian Cooper
Excellent article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is concise and informative. Thank you for sharing your knowledge!
Max Bell
Thank you, Julian! I'm glad you found the explanation concise and informative. If you have any questions or need further guidance, feel free to ask!
Chloe Butler
Max, your article on scraping web data with JavaScript, jQuery, and Regex is fantastic. The step-by-step instructions make it seem less daunting. Thank you for sharing your expertise!
Max Bell
Thank you, Chloe! I'm thrilled to hear that the step-by-step instructions made the process seem less daunting. If you have any questions or need further assistance, feel free to ask!
Henry Rogers
Max, this article on web scraping with JavaScript, jQuery, and Regex is incredibly helpful. The clear explanations and examples make it easier to understand. Thank you for sharing your expertise!
Max Bell
You're welcome, Henry! I'm delighted to hear that the clear explanations and examples made the topic easier to understand. If you have any questions or need further clarification, feel free to ask!
Violet Murphy
Max, your article on web scraping with JavaScript, jQuery, and Regex is fantastic. The use of Regex to extract specific data is really impressive. Thank you for sharing!
Max Bell
Thank you, Violet! I'm glad you found the use of Regex impressive. It's a powerful tool for extracting specific data. If you have any questions or need further assistance, feel free to ask!
Lucy Murphy
Great article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is concise and informative. Thank you for sharing your knowledge!
Max Bell
Thank you, Lucy! I'm glad you found the explanation concise and informative. If you have any questions or need further guidance, feel free to ask!
Samuel Brown
Max, your article on web scraping with JavaScript, jQuery, and Regex is excellent. The step-by-step guide is really helpful. Thank you for sharing your expertise!
Max Bell
Thank you, Samuel! I'm delighted to hear that you found the step-by-step guide helpful. If you have any questions or need further assistance, feel free to ask!
Lily Adams
Max, your article on scraping web data with JavaScript, jQuery, and Regex is fantastic. The examples provide a clear understanding of the process. Thank you for sharing your knowledge!
Max Bell
Thank you, Lily! I'm thrilled to hear that the examples provided a clear understanding of the process. If you have any questions or need further clarification, feel free to ask!
Jayden Watson
Excellent article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is thorough and easy to understand. Thank you for sharing your knowledge!
Max Bell
Thank you, Jayden! I'm glad you found the explanation thorough and easy to understand. If you have any questions or need further guidance, feel free to ask!
Nevaeh Wilson
Max, your article on web scraping with JavaScript, jQuery, and Regex is outstanding. The step-by-step instructions make it easy to follow. Thank you for sharing your expertise!
Max Bell
Thank you, Nevaeh! I'm glad you found the step-by-step instructions easy to follow. If you have any questions or need further assistance, feel free to ask!
Leo Hill
Max, this article on web scraping with JavaScript, jQuery, and Regex is incredibly helpful. The clear explanations and code examples make it seem less daunting. Thank you for sharing your expertise!
Max Bell
You're welcome, Leo! I'm thrilled to hear that the clear explanations and code examples made the topic less daunting. If you have any questions or need further assistance, feel free to ask!
Harper Turner
Max, your article on web scraping with JavaScript, jQuery, and Regex is fantastic. The step-by-step instructions and explanation are very insightful. Thank you for sharing your knowledge!
Max Bell
Thank you, Harper! I'm glad you found the step-by-step instructions and explanation insightful. If you have any questions or need further clarification, feel free to ask!
Bentley Cooper
Great article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is thorough and easy to understand. Thank you for sharing your expertise!
Max Bell
Thank you, Bentley! I'm glad you found the explanation thorough and easy to understand. If you have any questions or need further guidance, feel free to ask!
Victoria Hughes
Max, your article on scraping web data with JavaScript, jQuery, and Regex is fantastic. The examples provided a clear understanding of the process. Thank you for sharing your knowledge!
Max Bell
Thank you, Victoria! I'm thrilled to hear that the examples provided a clear understanding of the process. If you have any questions or need further clarification, feel free to ask!
Christopher Walker
Max, your article on web scraping with JavaScript, jQuery, and Regex is excellent. The step-by-step guide is really helpful. Thank you for sharing your expertise!
Max Bell
Thank you, Christopher! I'm delighted to hear that you found the step-by-step guide helpful. If you have any questions or need further assistance, feel free to ask!
Paisley Rodriguez
Max, your article on scraping web data with JavaScript, jQuery, and Regex is fantastic. The examples provided a clear understanding of the process. Thank you for sharing your knowledge!
Max Bell
Thank you, Paisley! I'm thrilled to hear that the examples provided a clear understanding of the process. If you have any questions or need further clarification, feel free to ask!
Charles Adams
Excellent article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is thorough and easy to understand. Thank you for sharing your knowledge!
Max Bell
Thank you, Charles! I'm glad you found the explanation thorough and easy to understand. If you have any questions or need further guidance, feel free to ask!
Eleanor Turner
Max, your article on web scraping with JavaScript, jQuery, and Regex is outstanding. The step-by-step instructions make it easy to follow. Thank you for sharing your expertise!
Max Bell
Thank you, Eleanor! I'm glad you found the step-by-step instructions easy to follow. If you have any questions or need further assistance, feel free to ask!
Julian Thompson
Max, this article on web scraping with JavaScript, jQuery, and Regex is incredibly helpful. The clear explanations and code examples make it seem less daunting. Thank you for sharing your expertise!
Max Bell
You're welcome, Julian! I'm thrilled to hear that the clear explanations and code examples made the topic less daunting. If you have any questions or need further assistance, feel free to ask!
Camila White
Max, your article on web scraping with JavaScript, jQuery, and Regex is fantastic. The use of Regex to extract specific data is really impressive. Thank you for sharing!
Max Bell
Thank you, Camila! I'm glad you found the use of Regex impressive. It's a powerful tool for extracting specific data. If you have any questions or need further assistance, feel free to ask!
Isabella Carter
Great article, Max! Your explanation of web scraping using JavaScript, jQuery, and Regex is concise and informative. Thank you for sharing your knowledge!
Max Bell
Thank you, Isabella! I'm glad you found the explanation concise and informative. If you have any questions or need further guidance, feel free to ask!

Post a comment

Post Your Comment

Skype

semaltcompany

WhatsApp

16468937756

Telegram

Semaltsupport