Currently i am using the following way to encode the url
urlAndMethod.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
After encoding
http://103.50.154.52:8383/api/master/insta-list?category=Postpaid%20Mobile%20CDMA%20&%20Landline
How do i handle the special characters including '&'
You can use .urlHostAllowed characterset.
let escapedString = someString.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)
Related
Why does converting a String to an URL in Swift 4.2 and then converting the URL back to a String using url.path change the encoding of special characters like german umlauts (ä, ö, ü), even if I use a utf-8 encoding?
I wrote some sample code to show my problem. I encoded the strings to base64 in order to show that there is a difference.
I also have a similar unsolved problem with special characters and swift here.
Sample Code
let string = "/path/to/file"
let stringUmlauts = "/path/to/file/with/umlauts/testäöü"
let base64 = Data(string.utf8).base64EncodedString()
let base64Umlauts = Data(stringUmlauts.utf8).base64EncodedString()
print(base64, base64Umlauts)
let url = URL(fileURLWithPath: string)
let urlUmlauts = URL(fileURLWithPath: stringUmlauts)
let base64Url = Data(url.path.utf8).base64EncodedString()
let base64UrlUmlauts = Data(urlUmlauts.path.utf8).base64EncodedString()
print(base64Url, base64UrlUmlauts)
Output
The base64 and base64Url string stay the same but the base64Umlauts and the base64UrlUmlauts are different.
"L3BhdGgvdG8vZmlsZQ==" for base64
"L3BhdGgvdG8vZmlsZQ==" for base64Url
"L3BhdGgvdG8vZmlsZS93aXRoL3VtbGF1dHMvdGVzdMOkw7bDvA==" for base64Umlauts
"L3BhdGgvdG8vZmlsZS93aXRoL3VtbGF1dHMvdGVzdGHMiG/MiHXMiA==" for base64UrlUmlauts
When I put the base64Umlauts and base64UrlUmlauts strings into an online Base64 decoder, they both show /path/to/file/with/umlauts/testäöü, but the ä, ö, ü are different (not visually).
stringUmlauts.utf8 uses the Unicode characters äöü.
But urlUmlauts.path.utf8 uses the Unicode characters aou each followed by the combining ¨.
This is why you get different base64 encoding - the characters look the same but are actually encoded differently.
What's really interesting is that Array(stringUmlauts) and Array(urlUmlauts.path) are the same. The difference doesn't appear until you perform the UTF-8 encoding of the otherwise exact same String values.
Since the base64 encoding is irrelevant, here's a more concise test:
let stringUmlauts = "/path/to/file/with/umlauts/testäöü"
let urlUmlauts = URL(fileURLWithPath: stringUmlauts)
print(stringUmlauts, urlUmlauts.path) // Show the same
let rawStr = stringUmlauts
let urlStr = urlUmlauts.path
print(rawStr == urlStr) // true
print(Array(rawStr) == Array(urlStr)) // true
print(Array(rawStr.utf8) == Array(urlStr.utf8)) // false!!!
So how is the UTF-8 encoding of two equal strings different?
One solution to this is to use precomposedStringWithCanonicalMapping on the result of path.
let urlStr = urlUmlauts.path.precomposedStringWithCanonicalMapping
Now you get true from:
print(Array(rawStr.utf8) == Array(urlStr.utf8)) // now true
This is my url,
http://api.theahsanzaman.info/token?username=haris123#gmail.com&password=Haris#123&grant_type=password
I want it to encode it like this way,
http://api.theahsanzaman.info/token?username%3Dharis123%40gmail.com%26password%3DHaris%40123%26grant_type%3Dpassword
The = sign should be replace by %3D
The & sign should be replace by %26
The # sign should be replace by %40
How can i change my ur to this?
If you want to do that, remove the characters to be percent escaped from the .urlQueryAllowed character set and percent encode accordingly:
var allowed = CharacterSet.urlQueryAllowed
allowed.remove(charactersIn: "=#&")
let result = urlString.addingPercentEncoding(withAllowedCharacters: allowed)
I'm building an iOS app that takes urls as input.
Unicode characters are valid for a tld but when I instantiate a valid URL that contains unicode characters NSURL returns nil.
Is this even possible?
swift eg.
URL(string: "http://➡.ws/䨹")
How to use special characters in URL (Swift 3) :
let myUrl = "http://➡.ws/䨹" as String
let url = URL(string: myUrl) // nil here .. problem !
if let encoded = myUrl.addingPercentEncoding(withAllowedCharacters: .urlFragmentAllowed){
let urlencoded = URL(string: encoded) // "http://%E2%9E%A1.ws/%E4%A8%B9" here :) no problem ^^
}
I'm trying to make a server request with
NSUrl(string: "http://example.com/α")
In which α is a greek character. So when i request this i get an error and my app crashes. So i tried to encode the url to this
let myUrl = NSURL(string: myLink.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)!)!
and now my link has become http://example.com/%CE%B1
where %CE%B1 is the α character. Although my server does not recognise it and it doesnt send me back the data.
I use node.js with io.socket connections. Is there any way with swift to send the correct url without the percent encoding?
For encode α in your url
let str = "α"
let url = str.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())
Now decode url string like this
let orgStr = url?.stringByRemovingPercentEncoding
print(orgStr)
Is there seriously not a way natively to URL Encode the value of a query string parameter that has a "+" character in it?
e.g.
me+blah#domain.net
to
me%2Bblah%40#domain.net?
I tried solutions like posted in these other questions, but those do not properly encode that email.
Swift - encode URL
How do I URL encode a string
A swift solution would be preferred as that is what I am working in at the moment, but I am capable of translating Objective-C Code to swift code for the most part.
Specifically I am trying to x-www-form-urlencoded encode query string values in the body of POST request.
let email = "me+blah#domain.net"
let output = CFURLCreateStringByAddingPercentEscapes(nil, email as NSString, nil, ":/?#!$&'()*+,;=" as NSString, CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding))
// output = "me%2Bblah%40domain.net"
CFURLCreateStringByAddingPercentEscapes doesn't escape + or # by default, but you can specify it (as I did along with other characters, in the ":/?#!$&'()*+,;=" string).
Edit: If you want output to be a Swift string:
let output = (CFURLCreateStringByAddingPercentEscapes(nil, email as NSString, nil, ":/?#!$&'()*+,;=" as NSString, CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding)) as NSString) as String
println(("me+blah#domain.net" as NSString)
.stringByAddingPercentEncodingWithAllowedCharacters(
NSCharacterSet.alphanumericCharacterSet()))
Output:
Optional("me%2Bblah%40domain%2Enet")
In Objective-C:
NSString *encodedString =
["me+blah#domain.net" stringByAddingPercentEncodingWithAllowedCharacters:
[NSCharacterSet alphanumericCharacterSet]];