Difference between revisions of "Swift Code Fragments"
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PeterHarding (talk | contribs) (Created page with " From: https://stackoverflow.com/questions/31080818/what-is-the-best-practice-to-parse-html-in-swift <pre> let file = "file.txt" if let dirs : [String] = NSSearchPathForDire...") |
PeterHarding (talk | contribs) (→URMLs) |
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(2 intermediate revisions by the same user not shown) | |||
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shareimprove this answer | shareimprove this answer | ||
</pre> | |||
=% Encoding URL Args= | |||
<pre> | |||
var myUrl = "http://myurl.com" | |||
myUrl = myUrl.addingPercentEncoding(withAllowedCharacters: .urlFragmentAllowed)! | |||
let url = URL(string: myUrl) | |||
</pre> | |||
=URLs= | |||
<pre> | |||
let myURLString = "https://google.com" | |||
guard let myURL = URL(string: myURLString) else { | |||
print("Error: \(myURLString) doesn't seem to be a valid URL") | |||
return | |||
} | |||
do { | |||
let myHTMLString = try String(contentsOf: myURL, encoding: .ascii) | |||
print("HTML : \(myHTMLString)") | |||
} catch let error { | |||
print("Error: \(error)") | |||
} | |||
</pre> | |||
<pre> | |||
let myURLString = "http://www.yahoo.com" | |||
if let myURL = NSURL(string: myURLString) { | |||
var error: NSError? | |||
let myHTMLString = try! NSString(contentsOfURL: myURL, encoding: NSUTF8StringEncoding) | |||
if let error = error { | |||
print("Error : \(error)") | |||
} else { | |||
print("HTML : \(myHTMLString)") | |||
} | |||
} else { | |||
print("Error: \(myURLString) doesn't URL") | |||
} | |||
</pre> | |||
<pre> | |||
Swift 3: | |||
if let url = URL(string: "https://www.google.com/") { | |||
do { | |||
let contents = try String(contentsOf: url) { | |||
print(contents) | |||
} else { | |||
// Can't unwrap! | |||
} | |||
} catch { | |||
// contents could not be loaded | |||
} | |||
} else { | |||
// the URL was bad! | |||
} | |||
</pre> | |||
<pre> | |||
let myURLString = "https://google.com" | |||
let myHTMLString = try URL(string: myURLString) | |||
.flatMap { try Data(contentsOf: $0) } | |||
.flatMap { String(data: $0, encoding: .ascii) } | |||
</pre> | </pre> | ||
[[Category:Swift]] | [[Category:Swift]] |
Latest revision as of 11:59, 14 January 2019
From: https://stackoverflow.com/questions/31080818/what-is-the-best-practice-to-parse-html-in-swift
let file = "file.txt" if let dirs : [String] = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true) as? [String] { let dir = dirs[0] //documents directory let path = dir.stringByAppendingPathComponent(file); let html = String(contentsOfFile: path, encoding: NSUTF8StringEncoding, error: nil)
Edit:
import Foundation let html = "theHtmlYouWannaParse" var err : NSError? var parser = HTMLParser(html: html, error: &err) if err != nil { println(err) exit(1) } var bodyNode = parser.body if let inputNodes = bodyNode?.findChildTags("b") { for node in inputNodes { println(node.contents) } } if let inputNodes = bodyNode?.findChildTags("a") { for node in inputNodes { println(node.getAttributeNamed("href")) //<- Here you would get your files link } } shareimprove this answer
% Encoding URL Args
var myUrl = "http://myurl.com" myUrl = myUrl.addingPercentEncoding(withAllowedCharacters: .urlFragmentAllowed)! let url = URL(string: myUrl)
URLs
let myURLString = "https://google.com" guard let myURL = URL(string: myURLString) else { print("Error: \(myURLString) doesn't seem to be a valid URL") return } do { let myHTMLString = try String(contentsOf: myURL, encoding: .ascii) print("HTML : \(myHTMLString)") } catch let error { print("Error: \(error)") }
let myURLString = "http://www.yahoo.com" if let myURL = NSURL(string: myURLString) { var error: NSError? let myHTMLString = try! NSString(contentsOfURL: myURL, encoding: NSUTF8StringEncoding) if let error = error { print("Error : \(error)") } else { print("HTML : \(myHTMLString)") } } else { print("Error: \(myURLString) doesn't URL") }
Swift 3: if let url = URL(string: "https://www.google.com/") { do { let contents = try String(contentsOf: url) { print(contents) } else { // Can't unwrap! } } catch { // contents could not be loaded } } else { // the URL was bad! }
let myURLString = "https://google.com" let myHTMLString = try URL(string: myURLString) .flatMap { try Data(contentsOf: $0) } .flatMap { String(data: $0, encoding: .ascii) }