web-crawler

Hello fellow developers! We are almost finished with developing first phase of our ajax web app. In our app we are using hash fragments like: http://ourdomain.com/#!list=last_ads&order=date I understand google will fetch this url and make a request to the server in this form: http://ourdomain.com/?_escaped_fragment_=list=last_ads?order=date&direction=desc everything is perfect, except... I would like to route this kind of request to another script like so: RewriteCond %{QUERY_STRING} ^_escaped_fragment_=(.*)$ RewriteRule ^$ /webroot/crawler.php$1 [L] The problem is, that when I try to print_r(

I'm reading this specification which is an agreement between web servers and search engine crawlers that allows for dynamically created content to be visible to crawlers. It's stated there that in order for a crawler to index html5 application one must implement routing using #! in URLs. In angular html5mode(true) we get rid of this hashed part of the URL. I'm wondering whether this is going to prevent crawlers from indexing my website. Short answer - No, html5mode will not mess up your indexing, but read on. Important note: Both Google and Bing can crawl AJAX based content without HTML

I crawled one URL with Nutch 2.1 and then I want to re-crawl pages after they got updated. How can I do this? How can I know that a page is updated? İsmet Alkan Simply you can't. You need to recrawl the page to control if it's updated. So according to your needs, prioritize the pages/domains and recrawl them within a time period. For that you need a job scheduler such as Quartz . You need to write a function that compares the pages. However, Nutch originally saves the pages as index files. In other words Nutch generates new binary files to save HTMLs. I don't think it's possible to compare

I want to crawl and save some webpages as HTML. Say, crawl into hundreds popular websites and simply save their frontpages and the "About" pages. I've looked into many questions, but didn't find an answer to this from either web crawling or web scraping questions. What library or tool should I use to build the solution? Or is there even some existing tools that can handle this? There really is no good solution here. You are right as you suspect that Python is probably the best way to start because of it's incredibly strong support of regular expression. In order to implement something like

every time i run my code my ip gets banned. I need help to delay each request for 10 seconds. I've tried to place DOWNLOAD_DELAY in code but it gives no results. Any help is appreciated. # item class included here class DmozItem(scrapy.Item): # define the fields for your item here like: link = scrapy.Field() attr = scrapy.Field() class DmozSpider(scrapy.Spider): name = "dmoz" allowed_domains = ["craigslist.org"] start_urls = [ "https://washingtondc.craigslist.org/search/fua" ] BASE_URL = 'https://washingtondc.craigslist.org/' def parse(self, response): links = response.xpath('//a[@class=