**\u0130stek Geri \u00c7a\u011fr\u0131lar\u0131 (Request Callbacks):** Scrapy’nin, HTTP istekleri tamamland\u0131ktan sonra verileri nas\u0131l i\u015flenece\u011fini tan\u0131mlad\u0131\u011f\u0131 fonksiyonlard\u0131r.<\/li>\n<\/ul>\n\u00d6zyinelemeli \u00c7izme<\/h2>\n
\u00d6zyinelemeli \u00e7izme, bir web sitesindeki t\u00fcm sayfalar\u0131n \u00e7izilmesini sa\u011flamak i\u00e7in kullan\u0131lan bir tekniktir. Bu, web sitesindeki ba\u011flant\u0131lar\u0131 izleyerek ve bu ba\u011flant\u0131lara ait sayfalar\u0131 \u00e7izen bir \u00f6r\u00fcmcek kullanarak yap\u0131l\u0131r. \u00d6r\u00fcmcek, t\u00fcm sayfalar \u00e7izilene kadar bu i\u015flemi tekrarlar. \u00d6zyinelemeli \u00e7izme, web sitesinin t\u00fcm i\u00e7eri\u011fini elde etmek i\u00e7in kullan\u0131labilen g\u00fc\u00e7l\u00fc bir tekniktir, ancak ayn\u0131 zamanda kaynak yo\u011fun olabilir. Bu nedenle, hedef web sitesinin tarama \u015fartlar\u0131na uyman\u0131z ve web sunucusunu gere\u011finden fazla y\u00fcklemekten ka\u00e7\u0131nman\u0131z \u00e7ok \u00f6nemlidir.<\/p>\n
\u0130stek Geri \u00c7a\u011fr\u0131lar\u0131<\/h2>\n
\u0130stek geri \u00e7a\u011fr\u0131lar\u0131, Scrapy’nin HTTP isteklerini tamamland\u0131ktan sonra nas\u0131l \u00e7al\u0131\u015faca\u011f\u0131n\u0131 belirleyen fonksiyonlard\u0131r. Scrapy’nin verileri i\u015fleme ve ek istekler g\u00f6nderme gibi i\u015flemleri bu geri \u00e7a\u011fr\u0131 fonksiyonlar\u0131 arac\u0131l\u0131\u011f\u0131yla ger\u00e7ekle\u015ftirebilirsiniz. \u00d6zyinelemeli \u00e7izmede, istek geri \u00e7a\u011fr\u0131lar\u0131, yeni ba\u011flant\u0131lar bulunmas\u0131 durumunda bu ba\u011flant\u0131lara ait sayfalar\u0131n \u00e7izilmesi i\u00e7in kullan\u0131l\u0131r. Bu i\u015flem, t\u00fcm ba\u011flant\u0131lar \u00e7izilene kadar devam eder.<\/p>\n
Uygulama<\/h2>\n
\u0130\u015fte Scrapy kullanarak \u00f6zyinelemeli \u00e7izme uygulamas\u0131 hakk\u0131nda bir \u00f6rnek:<\/p>\n
“`python
\nimport scrapy<\/p>\n
class MySpider(scrapy.Spider):
\n name = “my_spider”
\n start_urls = [“https:\/\/fatihsoysal.com”]<\/p>\n
def parse(self, response):
\n # Sayfadaki t\u00fcm ba\u011flant\u0131lar\u0131 al\u0131n
\n for link in response.css(“a::attr(href)”).getall():
\n # Ba\u011flant\u0131n\u0131n ge\u00e7erli URL olup olmad\u0131\u011f\u0131n\u0131 kontrol edin
\n if link.startswith(“https:\/\/fatihsoysal.com”):
\n # Yeni bir istek g\u00f6nderin ve parse fonksiyonunu geri \u00e7a\u011f\u0131r\u0131n
\n yield response.follow(link, callback=self.parse)<\/p>\n
# Sayfadaki verileri \u00e7\u0131kar\u0131n
\n yield {
\n “title”: response.css(“title::text”).get(),
\n “body”: response.css(“body::text”).get(),
\n }
\n“`<\/p>\n
Bu \u00f6rnek, web sitesindeki t\u00fcm sayfalar\u0131n \u00e7izilmesini sa\u011flayan bir \u00f6r\u00fcmcek tan\u0131mlar. \u00d6r\u00fcmcek, web sitesindeki t\u00fcm ba\u011flant\u0131lar\u0131 tarar, ard\u0131ndan bu ba\u011flant\u0131lara ait sayfalar\u0131n \u00e7izilmesi i\u00e7in yeni istekler g\u00f6nderir. Sayfadaki veri de parse fonksiyonu kullan\u0131larak \u00e7\u0131kar\u0131l\u0131r. Bu, bu veriyi JSON veya CSV gibi \u00e7e\u015fitli formatlarda kaydetmenize olanak tan\u0131r.<\/p>\n
Sonu\u00e7<\/h2>\n
Scrapy ile \u00f6zyinelemeli \u00e7izme, bir web sitesinden daha fazla veri toplaman\u0131za olanak tan\u0131yan g\u00fc\u00e7l\u00fc bir tekniktir. Bu makalede, Scrapy’nin temel i\u015flevselli\u011fini kullanarak \u00f6zyinelemeli \u00e7izmeyi uygulama hakk\u0131nda baz\u0131 temel kavramlar\u0131 ve \u00f6rne\u011fi inceledik. Scrapy, web \u00e7izme i\u00e7in geni\u015f bir yelpazede \u00f6zellik sunar ve bu nedenle verileri otomatik olarak toplamak isteyen geli\u015ftiriciler i\u00e7in g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r.\n<\/p>\n
Web \u00e7izme ile ilgili daha fazla bilgi i\u00e7in fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.<\/p>\n#Etiketler
\n* Scrapy
\n* Web \u00c7izme
\n* Python
\n* \u00d6zyinelemeli \u00c7izme
\n* \u0130stek Geri \u00c7a\u011fr\u0131lar\u0131
\n* Veri Toplama
\n* Web Verileri
\n* Web Geli\u015ftirme
\n* Programlama
\n* \u00c7er\u00e7eve
\n* HTML
\n* CSS
\n* XPath
\n* Veri Analizi
\n* Otomasyon
\n* Veri Bilimi
\n* Veri Madencili\u011fi
\n* Veri Kaz\u0131ma
\n* Veri \u00c7\u0131kar\u0131m\u0131
\n* Web Kaz\u0131ma
\n* Veri Toplama Ara\u00e7lar\u0131<\/p>\n","protected":false},"excerpt":{"rendered":"Scrapy ile Python’da Web Sayfalar\u0131n\u0131 \u00d6zyinelemeli Olarak \u00c7izme: \u0130stek Geri \u00c7a\u011fr\u0131lar\u0131 Kullan\u0131m\u0131 Web sayfalar\u0131ndan veri toplamak, g\u00fcn\u00fcm\u00fczde bir\u00e7ok…","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-3053","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\n
Scrapy ile Python'da Web Sayfalar\u0131n\u0131 \u00d6zyinelemeli Olarak \u00c7izme: \u0130stek Geri \u00c7a\u011fr\u0131lar\u0131 Kullan\u0131m\u0131<\/title>\n<meta name=\"description\" content=\"Web sayfalar\u0131ndan veri toplamak, g\u00fcn\u00fcm\u00fczde bir\u00e7ok uygulama i\u00e7in olmazsa olmaz bir gereksinim haline geldi. Bu veriler, pazar ara\u015ft\u0131rmas\u0131, fiyat kar\u015f\u0131la\u015ft\u0131rmas\u0131, haber toplama ve \u00e7ok daha fazlas\u0131 gibi \u00e7e\u015fitli ama\u00e7lar i\u00e7in kullan\u0131labilir. Web sayfalar\u0131n\u0131 otomatik olarak \u00e7izmek i\u00e7in bir\u00e7ok farkl\u0131 ara\u00e7 ve teknik bulunmaktad\u0131r, ancak Scrapy en pop\u00fcler ve g\u00fc\u00e7l\u00fc se\u00e7eneklerden biridir.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/scrapy-ile-pythonda-web-sayfalarini-ozyinelemeli-olarak-cizme-istek-geri-cagrilari-kullanimi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Scrapy ile Python'da Web Sayfalar\u0131n\u0131 \u00d6zyinelemeli Olarak \u00c7izme: \u0130stek Geri \u00c7a\u011fr\u0131lar\u0131 Kullan\u0131m\u0131\" \/>\n<meta property=\"og:description\" content=\"Web sayfalar\u0131ndan veri toplamak, g\u00fcn\u00fcm\u00fczde bir\u00e7ok uygulama i\u00e7in olmazsa olmaz bir gereksinim haline geldi. Bu veriler, pazar ara\u015ft\u0131rmas\u0131, fiyat kar\u015f\u0131la\u015ft\u0131rmas\u0131, haber toplama ve \u00e7ok daha fazlas\u0131 gibi \u00e7e\u015fitli ama\u00e7lar i\u00e7in kullan\u0131labilir. Web sayfalar\u0131n\u0131 otomatik olarak \u00e7izmek i\u00e7in bir\u00e7ok farkl\u0131 ara\u00e7 ve teknik bulunmaktad\u0131r, ancak Scrapy en pop\u00fcler ve g\u00fc\u00e7l\u00fc se\u00e7eneklerden biridir.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/scrapy-ile-pythonda-web-sayfalarini-ozyinelemeli-olarak-cizme-istek-geri-cagrilari-kullanimi\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2024-11-05T13:45:12+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/scrapy-ile-pythonda-web-sayfalarini-ozyinelemeli-olarak-cizme-istek-geri-cagrilari-kullanimi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/scrapy-ile-pythonda-web-sayfalarini-ozyinelemeli-olarak-cizme-istek-geri-cagrilari-kullanimi\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Scrapy ile Python’da Web Sayfalar\u0131n\u0131 \u00d6zyinelemeli Olarak \u00c7izme: \u0130stek Geri \u00c7a\u011fr\u0131lar\u0131 Kullan\u0131m\u0131\",\"datePublished\":\"2024-11-05T13:45:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/scrapy-ile-pythonda-web-sayfalarini-ozyinelemeli-olarak-cizme-istek-geri-cagrilari-kullanimi\/\"},\"wordCount\":770,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/scrapy-ile-pythonda-web-sayfalarini-ozyinelemeli-olarak-cizme-istek-geri-cagrilari-kullanimi\/#respond\"]}],\"copyrightYear\":\"2024\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/scrapy-ile-pythonda-web-sayfalarini-ozyinelemeli-olarak-cizme-istek-geri-cagrilari-kullanimi\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/scrapy-ile-pythonda-web-sayfalarini-ozyinelemeli-olarak-cizme-istek-geri-cagrilari-kullanimi\/\",\"name\":\"Scrapy ile Python'da Web Sayfalar\u0131n\u0131 \u00d6zyinelemeli Olarak \u00c7izme: \u0130stek Geri \u00c7a\u011fr\u0131lar\u0131 Kullan\u0131m\u0131\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2024-11-05T13:45:12+00:00\",\"description\":\"Web sayfalar\u0131ndan veri toplamak, g\u00fcn\u00fcm\u00fczde bir\u00e7ok uygulama i\u00e7in olmazsa olmaz bir gereksinim haline geldi. 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