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Semalt Uzman, Web'de Javascript ile Kazıma Rehberi Sağlıyor

Feb 09, 2018

Web sürtme, karar vermede kullanılan kritik verilerin mükemmel bir kaynağı olabilir. herhangi bir işte yapma süreci. Bu nedenle, güvenilir veri toplama yöntemlerinden biri olduğundan, veri analizinin özünde yer almaktadır. Ancak, hurdaya ayrılabilecek çevrimiçi içerik miktarı her zaman yükselişte olduğu için, her sayfayı manuel olarak hurdaya atmak neredeyse imkansız hale gelebilir. Bu otomasyon gerektirir.

Orada farklı otomasyon kazıma projeleri için uyarlanmış birçok araç olmasına rağmen, çoğunluğu prim ve bir servete mal olacak. Burası, Puppeteer + Chrome + Node.JS'nin içeri girdiği yerdir. Bu eğitimde, otomatik olarak web sitelerini kazıyabilmenizi sağlayan süreç boyunca yol gösterecektir.

Kurulum nasıl yapılır?

JavaScript üzerinde biraz bilgiye sahip olmanın bu projede kullanışlı olacağını not etmek önemlidir. Yeni başlayanlar için yukarıdaki 3 programı ayrı ayrı almanız gerekecek. Kuklacı kafasız Krom'u kontrol etmek için kullanılabilen bir Düğüm Kütüphanesi'dir. Başsız Krom, GUI'si olmadan krom çalıştırma işlemine, diğer bir deyişle krom çalıştırmadan işleme anlamına gelir. Düğüm 8+ 'i resmi web sitesinden yüklemeniz gerekecek.

Programları kurduktan sonra, kodu tasarlamaya başlamak için yeni bir proje hazırlama zamanı geldi. İdeal olarak, kazıma sürecini otomatikleştirmek için kodu kullanacağınız JavaScript çizmektir. Puppeteer hakkında daha fazla bilgi için dokümantasyonuna bakın, yüzlerce örnek sizi oynamaya hazır.

JavaScript kazımayı otomatikleştirme

Yeni bir proje oluştururken, bir dosya (.js) oluşturmaya devam edin. İlk satırda, daha önce kurduğunuz Puppeteer bağımlılığını çağırmanız gerekecek. Daha sonra, tüm otomasyon kodunu taşıyan birincil bir "getPic" işlevi izler. Üçüncü satır, çalıştırmak için "getPic" işlevini çağırır.

GetPic fonksiyonunun bir "async" fonksiyonu olduğunu düşünürsek, bir sonraki kod satırına geçmeden önce "vaadin" çözülmesini beklerken fonksiyonu duraklatan await ifadesini kullanabiliriz. Bu, birincil otomasyon fonksiyonu olarak işlev görür.

Başlıksız krom nasıl çağırılır

Bir sonraki kod satırı: "const browser = puppeteer.Launch; 'yı bekler" otomatik olarak puppeteer'i başlatacak ve yeni oluşturulan "tarayıcı" değişkenimize ayarlı bir krom örneği yayınlayacaktır. Hurdaya çıkarmak istediğiniz URL'ye gitmek için kullanılacak bir sayfa oluşturmaya devam edin.

Verileri nasıl hurdaya çıkarabilirsiniz

Puppeteer API, saat, form doldurma ve veri okuma gibi farklı web sitesi girişleriyle oynamaya izin verir. Bu işlemleri nasıl otomatikleştirebileceğinizle ilgili yakından görülebilmek için başvurabilirsiniz. Kazıma kodunu girmek için kazımafonksiyonu kullanılacaktır. Sürtünme işlemini başlatmak için düğüm scrape.js işlevini çalıştırmaya devam edin. Ardından, tüm kurulum gerekli içeriği çıkarmaya otomatik olarak başlamalıdır. Kodunuzu incelemeyi unutmayın ve yol boyunca hatalara maruz kalmamak için her şeyin tasarıma göre çalıştığını kontrol etmeniz önemlidir.

Frank Abagnale

Thank you all for reading my article on 'Semalt Uzman, Web'de Javascript ile Kazıma Rehberi Sağlıyor'. I'm excited to discuss this topic with you.

Julia Banks

I really enjoyed your article, Frank! It provided valuable insights into using JavaScript for web scraping.

Frank Abagnale

Thank you, Julia! I'm glad you found it helpful.

Michael Thompson

Great article, Frank! I have been wanting to learn more about web scraping with JavaScript.

Frank Abagnale

Thank you, Michael! I hope my article can help you get started with web scraping using JavaScript.

Sarah Adams

I found your article very informative, Frank. Web scraping can be a powerful tool when used responsibly.

Frank Abagnale

Absolutely, Sarah! Web scraping can provide valuable data for various purposes, but it's important to respect website terms and conditions.

David Carter

Frank, your article was well-written and easy to follow. Thanks for sharing your knowledge!

Frank Abagnale

You're welcome, David! I'm glad you found it helpful. Feel free to ask any questions you may have.

Emma Thompson

Frank, great article! I've been using web scraping for my market research, and JavaScript has been very useful.

Frank Abagnale

Thank you, Emma! JavaScript indeed provides powerful tools for web scraping. If you have any specific use cases, feel free to share.

Brian Wilson

Your article was very insightful, Frank. I appreciate the step-by-step approach to web scraping with JavaScript.

Frank Abagnale

Thank you for your kind words, Brian! I believe a clear step-by-step approach helps readers grasp the process better.

Sophia Young

Frank, your article was excellent! I'm excited to apply your tips to my web scraping projects.

Frank Abagnale

That's great to hear, Sophia! I hope my tips will bring value to your web scraping projects.

Benjamin Davis

Frank, your article inspired me to delve deeper into web scraping. I look forward to learning more about JavaScript for this purpose.

Frank Abagnale

That's wonderful, Benjamin! JavaScript offers a lot of flexibility for web scraping. Let me know if you have any questions along the way.

Jennifer Lee

I appreciate the tips and tricks you shared, Frank. They will definitely help me in my web scraping endeavors.

Frank Abagnale

You're welcome, Jennifer! I'm glad you found the tips useful. Best of luck with your web scraping projects!

Mark Wilson

Frank, your article was a great resource for understanding JavaScript web scraping techniques. Thank you!

Frank Abagnale

Thank you for your kind words, Mark! I'm happy to hear that my article helped you understand JavaScript web scraping better.

Alexis Turner

Frank, your article was informative and well-explained. I'm motivated to explore JavaScript web scraping further.

Frank Abagnale

That's great to hear, Alexis! JavaScript offers endless possibilities for web scraping. Don't hesitate to ask if you need any guidance.

Nicholas Scott

Frank, your article was a fantastic introduction to JavaScript web scraping. I can't wait to try it out myself!

Frank Abagnale

Thank you, Nicholas! I'm glad you found the article helpful. If you have any questions during your exploration, feel free to reach out.

Olivia Rodriguez

Your article was clear and concise, Frank. It gave me a better understanding of JavaScript web scraping.

Frank Abagnale

Thank you, Olivia! I believe a clear explanation is crucial for readers to grasp the concepts effectively.

Anthony Clark

Frank, your article was a great read. JavaScript web scraping is a fascinating area, and your insights were valuable.

Frank Abagnale

Thank you, Anthony! I'm glad you found the topic fascinating. Let me know if you have any specific questions or need further information.

Victoria Jameson

Frank, your article was spot on! JavaScript web scraping can be a game-changer if used wisely.

Frank Abagnale

Absolutely, Victoria! It's crucial to use web scraping responsibly and ethically to maximize its potential benefits.

Jacob Anderson

Frank, your article was very informative. It provided a solid foundation for JavaScript web scraping.

Frank Abagnale

I'm glad you found it informative, Jacob! Building a solid foundation is essential before diving deeper into JavaScript web scraping.

Ava Thomas

Frank, great article! I've been meaning to learn more about JavaScript web scraping, and your article was just what I needed.

Frank Abagnale

Thank you, Ava! I'm glad my article could meet your learning needs. If you have any questions along the way, feel free to ask.

Jason Wright

Your article was well-explained, Frank. It's refreshing to see JavaScript web scraping techniques broken down.

Frank Abagnale

Thank you, Jason! I believe breaking down the techniques helps readers grasp them better. Let me know if you need any further clarification.

Lily Morris

Frank, your article was fantastic! I'm excited to apply JavaScript web scraping in my projects.

Frank Abagnale

That's great to hear, Lily! JavaScript web scraping can bring a lot of value to various projects. If you have any specific use cases, feel free to share.

Christopher Walker

Frank, your article was a great introduction to JavaScript web scraping. I appreciate the insights you provided.

Frank Abagnale

Thank you, Christopher! I'm glad you found the introduction helpful. If you have any questions as you explore further, feel free to ask.

Ella Martinez

Your article was well-written and informative, Frank. I'm looking forward to trying out JavaScript web scraping.

Frank Abagnale

I appreciate your kind words, Ella! Trying out JavaScript web scraping can be an exciting journey. Let me know if you need any guidance along the way.

Jason Johnson

Frank, your article was top-notch! I can't wait to implement JavaScript web scraping techniques in my projects.

Frank Abagnale

Thank you, Jason! I'm excited for you to implement JavaScript web scraping in your projects. If you need any assistance or have questions, feel free to reach out.

Hannah Thompson

Frank, your article was clear and concise. I now have a better understanding of JavaScript web scraping.

Frank Abagnale

I'm glad you found it clear and concise, Hannah! Understanding the concepts is key to effectively utilizing JavaScript web scraping.

Jonathan Davis

Frank, your article was a great resource. I'm excited to explore JavaScript web scraping further.

Frank Abagnale

That's wonderful, Jonathan! JavaScript offers a vast array of possibilities for web scraping. Let me know if you have any questions along the way.

Isabella Wilson

Frank, your article was brilliant! I'm motivated to dive into JavaScript web scraping.

Frank Abagnale

Thank you, Isabella! Diving into JavaScript web scraping can be an exciting and rewarding journey. Feel free to ask if you need any assistance.

Samuel Rivera

Frank, your article was extremely insightful. I greatly enjoyed reading about JavaScript web scraping.

Frank Abagnale

I appreciate your kind words, Samuel! JavaScript web scraping is indeed an interesting field. If you have any specific questions, feel free to ask.

Addison Roberts

Frank, your article was fantastic! It was a comprehensive guide to JavaScript web scraping.

Frank Abagnale

Thank you, Addison! I'm glad you found it comprehensive. Let me know if there's anything else you'd like to know about JavaScript web scraping.

Christopher Miller

Frank, your article was an excellent read. I'm excited to explore JavaScript web scraping further.

Frank Abagnale

Thank you, Christopher! Exploring JavaScript web scraping further can lead to exciting possibilities. If you need any guidance along the way, feel free to reach out.

Grace Turner

Your article was informative and well-presented, Frank. I'm eager to try out JavaScript web scraping techniques.

Frank Abagnale

I appreciate your kind words, Grace! Trying out JavaScript web scraping techniques can be a valuable learning experience. Let me know if you need any assistance.

Ethan Murphy

Frank, your article was a great resource for understanding JavaScript web scraping. Thank you for sharing your expertise.

Frank Abagnale

Thank you for your kind words, Ethan! I'm glad you found the article helpful in understanding JavaScript web scraping. If you have any questions, feel free to ask.

Oliver Martin

Frank, your article was clear and concise. I now have a better understanding of JavaScript web scraping techniques.

Frank Abagnale

I'm glad you found it clear and concise, Oliver! Understanding the techniques is crucial for effective JavaScript web scraping. Let me know if you have any specific questions.

Audrey Turner

Frank, your article was fantastic! It provided valuable insights into JavaScript web scraping.

Frank Abagnale

Thank you, Audrey! I'm glad you found the insights valuable. If you have any specific queries or need further information, feel free to ask.

Hunter White

Frank, your article was top-notch! JavaScript web scraping is an exciting field, and your article enhanced my understanding.

Frank Abagnale

Thank you, Hunter! JavaScript web scraping does indeed offer exciting possibilities. I'm glad my article enhanced your understanding. If you have any specific questions, feel free to ask.

Jonathan Patterson

Your article was informative and well-written, Frank. Great insights into JavaScript web scraping!

Frank Abagnale

I appreciate your kind words, Jonathan! I'm glad you found the article informative. If you have any questions or need further information on JavaScript web scraping, feel free to ask.

William Hill

Frank, your article was excellent! It provided a comprehensive guide to JavaScript web scraping.

Frank Abagnale

Thank you, William! I'm glad you found the guide comprehensive. If there's any specific aspect or technique you'd like to know more about, let me know.

Grace Mitchell

Your article was well-structured and easy to follow, Frank. I now have a better understanding of JavaScript web scraping.

Frank Abagnale

I appreciate your feedback, Grace! A well-structured article helps readers grasp the concepts better. If you have any specific questions or need further assistance with JavaScript web scraping, feel free to ask.

Chloe Richardson

Frank, your article was spot on! I'm motivated to explore JavaScript web scraping further.

Frank Abagnale

Thank you, Chloe! Exploring JavaScript web scraping further can bring countless opportunities. Let me know if you require any guidance or have specific questions.

Oliver Turner

Frank, your article was fantastic! It provided valuable insights into JavaScript web scraping.

Frank Abagnale

Thank you for your kind words, Oliver! I'm glad you found the insights valuable. If there's anything specific you'd like to learn more about regarding JavaScript web scraping, feel free to ask.

Ruby Evans

Your article was informative and well-presented, Frank. I'm excited to implement JavaScript web scraping techniques.

Frank Abagnale

I'm glad you found it informative and well-presented, Ruby! Implementing JavaScript web scraping techniques can be an exciting journey. Let me know if you need any assistance or have questions along the way.

Matthew Hill

Frank, your article was fantastic! I'm eager to try out JavaScript web scraping in my projects.

Frank Abagnale

Thank you, Matthew! Trying out JavaScript web scraping in your projects can bring a lot of value. If you have any specific questions or need guidance, feel free to reach out.

Sophie Phillips

Your article was clear and concise, Frank. It gave me a better understanding of JavaScript web scraping.

Frank Abagnale

I'm glad you found it clear and concise, Sophie! Clear explanations are crucial for readers to grasp the concepts effectively. If you have any specific questions, feel free to ask.

Robert Bailey

Frank, your article was a great read! It provided valuable information about JavaScript web scraping techniques.

Frank Abagnale

Thank you, Robert! I'm glad you found the article valuable and informative. If there's anything specific you'd like to know about JavaScript web scraping, feel free to ask.

Joseph Foster

Frank, your article was fantastic! It provided a solid foundation for JavaScript web scraping.

Frank Abagnale

Thank you, Joseph! Building a strong foundation is essential for effective JavaScript web scraping. If you have any questions as you explore further, feel free to ask.

Daniel Hall

Your article was well-written, Frank. It clarified many concepts related to JavaScript web scraping.

Frank Abagnale

I appreciate your feedback, Daniel! Clarifying concepts is crucial for readers to grasp the nuances of JavaScript web scraping. If you have any specific questions, feel free to ask.

Emily Wright

Frank, your article was a great resource! The insights you provided about JavaScript web scraping were invaluable.

Frank Abagnale

Thank you for your kind words, Emily! I'm glad you found the insights invaluable. If you have any specific questions or need further information, feel free to ask.

Aaron Anderson

Your article was well-structured and easy to follow, Frank. It provided a comprehensive understanding of JavaScript web scraping.

Frank Abagnale

I appreciate your feedback, Aaron! A well-structured article helps readers grasp the concepts better. If there's any specific aspect or technique you'd like to know more about regarding JavaScript web scraping, let me know.

Layla Mitchell

Frank, your article was excellent! It covered the essentials of JavaScript web scraping perfectly.

Frank Abagnale

Thank you, Layla! Covering the essentials effectively is crucial for understanding JavaScript web scraping. If there's anything specific you'd like to know more about, feel free to ask.

Leo Walker

Your article was insightful and well-explained, Frank. It enhanced my understanding of JavaScript web scraping techniques.

Frank Abagnale

I appreciate your feedback, Leo! Enhancing the understanding of JavaScript web scraping techniques is a key goal. If you have any specific questions or need further assistance, feel free to ask.

Isaac Turner

Frank, your article was fantastic! I'm eager to try out JavaScript web scraping in my projects.

Frank Abagnale

Thank you, Isaac! Trying out JavaScript web scraping in your projects can bring numerous possibilities. If you have any specific questions or need guidance, feel free to reach out.

Victoria Edwards

Your article was informative and well-presented, Frank. I'm excited to implement JavaScript web scraping techniques.

Frank Abagnale

I'm glad you found it informative and well-presented, Victoria! Implementing JavaScript web scraping techniques can be a valuable skill. Let me know if you need any assistance or have questions along the way.

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web içeriği çıkarıcı

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Semalt Uzman, Web'de Javascript ile Kazıma Rehberi Sağlıyor

Kurulum nasıl yapılır?

JavaScript kazımayı otomatikleştirme

Başlıksız krom nasıl çağırılır

Verileri nasıl hurdaya çıkarabilirsiniz

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