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Merge pull request #8 from johnste/resolve-short-urls
Short url resolver
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // | ||
| // ShortUrlResolver.swift | ||
| // Finicky | ||
| // | ||
| // Created by John Sterling on 03/07/15. | ||
| // Copyright (c) 2015 John sterling. All rights reserved. | ||
| // | ||
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| import Foundation | ||
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| class ResolveShortUrls: NSObject, NSURLSessionDelegate, NSURLSessionTaskDelegate { | ||
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| private var shortUrlResolver : FNShortUrlResolver? = nil | ||
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| init(shortUrlResolver: FNShortUrlResolver) { | ||
| self.shortUrlResolver = shortUrlResolver | ||
| super.init() | ||
| } | ||
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| func URLSession(session: NSURLSession, task: NSURLSessionTask, willPerformHTTPRedirection response: NSHTTPURLResponse, newRequest request: NSURLRequest, completionHandler: (NSURLRequest!) -> Void) { | ||
| var newRequest : NSURLRequest? = request | ||
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| if contains([301, 302, 309], response.statusCode) { | ||
| if let newUrl = NSURL(string: (response.allHeaderFields["Location"] as? String)!) { | ||
| if !shortUrlResolver!.isShortUrl(newUrl) { | ||
| newRequest = nil | ||
| } | ||
| } | ||
| } | ||
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| completionHandler(newRequest) | ||
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| } | ||
| } | ||
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| class FNShortUrlResolver { | ||
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| private var shortUrlProviders = [ | ||
| "bit.ly", | ||
| "goo.gl", | ||
| "owl.ly", | ||
| "deck.ly", | ||
| "t.co", | ||
| "su.pr", | ||
| "spoti.fi", | ||
| "fur.ly", | ||
| "tinyurl.com" | ||
| ] | ||
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| init() { | ||
| } | ||
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| func isShortUrl(url: NSURL) -> Bool { | ||
| return contains(shortUrlProviders, url.host!) | ||
| } | ||
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| func resolveUrl(url: NSURL, callback: ((NSURL) -> Void)) -> Void { | ||
| if !self.isShortUrl(url) { | ||
| callback(url) | ||
| return | ||
| } | ||
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| var response: NSURLResponse? | ||
| var error: NSError? | ||
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| var request = NSURLRequest(URL: url) | ||
| let myDelegate = ResolveShortUrls(shortUrlResolver: self) | ||
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| let session = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration(), delegate: myDelegate, delegateQueue: nil) | ||
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| let task = session.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in | ||
| if let responsy : NSHTTPURLResponse = response as? NSHTTPURLResponse { | ||
| let newUrl = NSURL(string: (responsy.allHeaderFields["Location"] as? String)!)! | ||
| callback(newUrl) | ||
| } else { | ||
| callback(url) | ||
| } | ||
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| }) | ||
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| task.resume() | ||
| return | ||
| } | ||
| } |