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Web development

Semalt Payları Web Sitelerinden Bilgi Çıkarmanın Kolay Yolu

Feb 09, 2018

Web Sıyırma, web sitelerinden içerik almak için kullanılan popüler bir yöntemdir. Özel olarak programlanmış bir algoritma, sitenin ana sayfasına gelir ve belirttiğiniz div'lerin iç kısımlarını birleştiren tüm dahili bağlantıları takip etmeye başlar. Sonuçta hazır CSV dosyası, gerekli tüm bilgileri içeren ve sıkı bir sırayla. Ortaya çıkan CSV, neredeyse benzersiz içerik oluşturan gelecek için kullanılabilir. Ve genel olarak, bir tablo olarak, bu tür veriler çok değerlidir. Bir inşaat atölyesi ürün listesinin tamamının bir tabloda olduğunu hayal edin. Üstelik, her ürün için, ürünün her türü ve markası için tüm alanlar ve özellikler doldurulmuştur. Bir çevrimiçi mağaza için çalışan herhangi bir metin yazarı böyle bir CSV dosyasına sahip olmaktan mutluluk duyacaktır.

Web sitelerinden veya web kazıyıcılardan veri ayıklamak için çok sayıda araç bulunmaktadır ve herhangi bir programlama dili bilen olmadığınız için endişelenmeyin; bu makalede En kolay yollar - Scrapinghub'u kullanarak.

Her şeyden önce, scrapinghub.com adresine gidin, kaydolun ve oturum açın.

Kuruluşunuzla ilgili bir sonraki adım atlanabilir.

Sonra profilinize geldiniz. Bir proje oluşturmanız gerekir.

Burada bir algoritma seçmeniz ("Portia" algoritması kullanacağız) ve projeye bir isim verin. Bir şekilde alışılmadık diyelim. Örneğin, "111".

Şimdi, veri ayıklamak istediğiniz web sitesinin URL'sini yazmanız gereken algoritmanın çalışma alanına giriyoruz. Ardından "Yeni Örümcek" e tıklayın.

Örnek olarak hizmet verecek olan sayfaya geçeceğiz. Adres başlıkta güncellenir. "Bu Sayfaya Açıkla" yı tıklayın.

Fare imlecini sağa doğru hareket ettirerek menü görünür hale gelecektir. Burada, "Öğeleri Düzenle" yi tıklamanız gereken "Çıkarılmış öğe" sekmesiyle ilgileniyoruz.

Ancak alanlarımızın boş listesi görüntülenir. "+ Alanı" nı tıklayın.

Burada her şey basit: alanların bir listesini oluşturmanız gerekiyor. Her bir öğe için bir ad (bu durumda bir başlık ve içerik) girmeniz, bu alanın zorunlu olup olmadığını ("Gerekli") ve değişken olup olamayacağını ("Değişken") belirtmeniz gerekir. Bir öğenin "gerekli" olduğunu belirttiğinizde, algoritma bu alanı dolduramayacağı sayfaları atlar. İşaretlenmezse süreç sonsuza dek sürebilir.

Şimdi sadece ihtiyacımız olan alana tıklayın ve bunun ne olduğunu belirtin:

Bitti mi? Daha sonra web sitesinin başlığında "Örnek Kaydet" i tıklayın. Bundan sonra, çalışma alanına dönebilirsiniz. Şimdi algoritma bir şeyler nasıl alacağını biliyor, onun için bir görev belirlememiz gerekiyor. Bunu yapmak için "Değişiklikleri Yayınlayın" ı tıklayın.

Görev tahtasına gidin, "Run Spider" ı tıklayın. Web sitesini, önceliğini seçin ve "Çalıştır" ı tıklayın.

Peki, kazıma işlemi devam ediyor. Hızı, imlecinizi gönderilen isteklerin sayısına işaret ederek gösterilir:

CSV'de dizeleri hazırlama hızı - başka bir sayıya işaret ederek.

Zaten yapılmış olanların bir listesini görmek için sadece bu numarayı tıklayın. Benzer bir şey göreceksiniz:

Bitirince, bu butona tıklayarak sonuç kaydedilebilir:

İşte! Artık, programlamada herhangi bir deneyime sahip olmadan web sitelerinden bilgi ayıklayabilirsiniz.

David Johnson

Thank you for reading my article! I hope you find it helpful.

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kazıma betiği

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Semalt Payları Web Sitelerinden Bilgi Çıkarmanın Kolay Yolu

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