![]() ![]() As always, we don't want this fingerprint to stick out too much, so we should aim to replicate the most common platforms such as Chrome on Windows or Safari on MacOS. Using this information we can build our header fingerprint profiles for our web scrapers. User-Agent: Mozilla/5.0 (Macintosh Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Safari/605.1.15Ībove shows default headers and their order common web browsers send as a first request when establishing connection. User-Agent: Mozilla/5.0 (X11 Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/.74 Safari/537.36Īccept: text/html,application/xhtml+xml,application/xml q=0.9,image/avif,image/webp,image/apng,*/* q=0.8,application/signed-exchange v=b3 q=0.9 If we run this script and go to in our browser we'll see the exact http connection string our browser is sending: Chrome on Linux GET / HTTP/1.1 With socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: We can achieve this with a short python script: import socket To understand what browsers are sending we need a simple echo server that would print out HTTP connection details server is receiving. Let myNumber = NSNumberFormatter().numberFromString(myFinalString)!.When web scraping we want our scraper to appear as a web browser, so firstly we should ensure that our scraper replicates common standard headers a web browser such as Chrome or Firefox is sending. ![]() Let myFinalString = myShortenedString.substringToIndex(advance(string1.startIndex, 4)) // deletes all but the first 4 chars of the right-hand part of the string Let myShortenedString = myString.substringFromIndex(advance(myString.startIndex, startIndex)) // gets the right-hand part of the string Let startIndex = advance(distance(comed.startIndex, starter), -6) // backs up the index from where the range was found ![]() Var range = myString.rangeOfString("per kWh") Var myString = something something from NSString(data: data!, encoding: NSUTF8StringEncoding) Once I get past that, I can use the following code to clip out just the data I need. Print(NSString(data: data!, encoding: NSUTF8StringEncoding))īut while I can print it, I can't seem to get the NSString data into a Swift string. The code in my first post nicely prints these couple lines to the console, and the numerical result I need is in the printed output So the "page" I need to extract the data from is much smaller, just a couple lines of text. I've since learned that the data I need can be accessed by directly linking to a servlet in a browser, see here for instance. Well I've gotten a lot closer but I'm still struggling. PS: in the example of how to inject a script, they used "Wikipedia" as an example site, so you can search for that on the asciiwwdc2014 site to find sessions that used that term. In the end I was able to get a form listener installed, so when a user logged in I could determine the email address used. I don't know JavaScript so this was a real PITA. In brief, you use a WKWebView (and perhaps you can make it invisible or offscreen), you tell it to connect to a URL, at some point you add your own script, then when the page has loaded, you invoke your script, which posts back some data. In the end I froze the video (or slide) and did a screen print to access the otherwise unavailable source code. One the WWDC 2014 sessions covered this topic, I believe it was "Introducing the Modern WebKit API". This is all terribly complicated (for me it was), and daunting as there are few examples to go by. You script can call one of the existing scripts, and return a value to you in a "post back" message. ![]() If the web page has scripts, its possible for you to inject your own script into the downloaded page, then call it. ![]()
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