[ad_1] It seems you have json inside the <code> tag. So first (after you get the inner html of the <code> tag) get rid of the comments (‘<!–‘, ‘–>‘) and then use function json_decode() [ad_2] solved How to parse information within HTML tag using php [duplicate]
[ad_1] You can look for the tag in the . For example, one can use something like: response.xpath(‘//title’) 2 [ad_2] solved How can I determine the name of the website by scraping the webpage?
[ad_1] The main issue with your code is using of .select instead of .css. Here is what do you need but I’m not sure about titles part (may be you need it on other pages): def parse(self, response): titles = response.xpath(“//div[@class=”artist”]”) # items = [] for title in titles: item = ArtistlistItem() item[“artist”] = title.css(“h2::text”).get() … Read more
[ad_1] Crawlers don’see or care about server-side code. They only see the content output by a requested URL just like any user-agent. [ad_2] solved SEO: How does a crawler consider PHP built pages? [closed]
[ad_1] For Python you could go with Frontera by Scrapinghub https://github.com/scrapinghub/frontera https://github.com/scrapinghub/frontera/blob/distributed/docs/source/topics/distributed-architecture.rst They’re the same guys that make Scrapy. There’s also Apache Nutch which is a much older project. http://nutch.apache.org/ 1 [ad_2] solved How to build a powerful crawler like google’s? [closed]
[ad_1] Suggested readings Static pages: java.net.URLConnection and java.net.HttpURLConnection jsoup – HTML parser and content manipulation library Mind you, many of the pages will create content dynamically using JavaScript after loading. For such a case, the ‘static page’ approach won’t help, you will need to search for tools in the “Web automation” category.Selenium is such a … Read more
[ad_1] MySQL extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. Use MySQLi-connect insted of MySQL_connect as well as instead of mysql_select_db use mysqli_select_db EDIT 01 in mysqli_connect you can select database too $link = mysqli_connect(“127.0.0.1”, “my_user”, “my_password”, “my_db”); 6 [ad_2] solved … Read more
[ad_1] To answer my own question: I implemented the same logic with Jsoup and the time bench mark yielded the results for a fixed amount of data: Selenium: 2 minutes 46 seconds Jsoup: 16 seconds Thus it seems that Selenium is much slower. I cannot give a technical reason why this is so. I can … Read more
[ad_1] Provided your intentions are not nefarious– As mentioned in the comment, one way to achieve this is executing the crawler in parallel (multithreading)—as opposed to doing one domain at a time. Something like: exec(‘php crawler.php > /dev/null 2>&1 &’); exec(‘php crawler.php > /dev/null 2>&1 &’); exec(‘php crawler.php > /dev/null 2>&1 &’); exec(‘php crawler.php > … Read more
[ad_1] Based on the fact that your images is a available ArrayList<>, you should do like this: if(images.size() > 0){ for (Element src : images){ if (src != null) { System.out.println(“Source ” + src.attr(“abs:src”)); } } } else { System.out.println(“There are no elements in ArrayList<> images”); } First you check if there are elements in … Read more
[ad_1] If you want to create your own web crawler in Java you may want to look at this You could also take a look at jSpider and jsoup. Edit : This could work too : crawler4j 5 [ad_2] solved How to web crawl some sites [closed]