Re: Create a NSURL as a way to validate urls - not working
On 3 Mar 2015, at 22:42, Juanjo Conti jjco...@carouselapps.com wrote:
Ok, first of all thanks all for the replies.
I'm trying to solve it this an util class method:
import Cocoa
class Utils: NSObject {
class func isValidUrl(url: NSURL?) {
var lower = url?.scheme?.lowercaseString
return lower == http || lower == https
}
}
Sadly I'm getting and error in the return line that I can't interprete:
Cannot invoke == with argument list of type `($T4, $T8)`
What I'm doing wrong?
Using Swift :)
Thanks,
If you use the latest beta you get a slightly better error message “Bool is not
convertible to ()”, that is one thing that version has fixed, the $T3 variables
in error messages, which is a good step forward.
That error message might lead you to realise what I didn’t from the original
error message either, that your function definition is missing “-Bool” to give
it a return type. Would still prefer an error message which directly said
‘Incorrect return type” but at least this one gave enough hints to figure it
out.
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Re: Create a NSURL as a way to validate urls - not working
Missing return type!!! Argh... caming from Python and Ruby doesn't help.
Thanks!!!
On Tue, Mar 3, 2015 at 12:27 PM, Roland King r...@rols.org wrote:
On 3 Mar 2015, at 22:42, Juanjo Conti jjco...@carouselapps.com wrote:
Ok, first of all thanks all for the replies.
I'm trying to solve it this an util class method:
import Cocoa
class Utils: NSObject {
class func isValidUrl(url: NSURL?) {
var lower = url?.scheme?.lowercaseString
return lower == http || lower == https
}
}
Sadly I'm getting and error in the return line that I can't interprete:
Cannot invoke == with argument list of type `($T4, $T8)`
What I'm doing wrong?
Using Swift :)
Thanks,
If you use the latest beta you get a slightly better error message “Bool
is not convertible to ()”, that is one thing that version has fixed, the
$T3 variables in error messages, which is a good step forward.
That error message might lead you to realise what I didn’t from the
original error message either, that your function definition is missing
“-Bool” to give it a return type. Would still prefer an error message
which directly said ‘Incorrect return type” but at least this one gave
enough hints to figure it out.
--
Juanjo Conti jjconti http://goog_2023646312@carouselapps.com
jjco...@carouselapps.com
Software Engineer - Carousel Apps https://carouselapps.com
--
Carousel Apps Limited, registered in England Wales with registered number
7689440 and registered office Unit 2 Artbrand Studios, 7 Leathermarket
Street, London SE1 3HN. Any communication sent by or on behalf of Carousel
App Ltd or any of its subsidiary, holding or affiliated companies or
entities (together Watu) is confidential and may be privileged or
otherwise protected. If you receive it in error please inform us and then
delete it from your system. You should not copy it or disclose its contents
to anyone. Messages sent to and from Watu may be monitored to ensure
compliance with our internal policies and to protect our business. Emails
are not secure and cannot be guaranteed to be error free. Anyone who
communicates with us by email is taken to accept these risks.
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Re: Create a NSURL as a way to validate urls - not working
class Utils: NSObject {
class func isValidUrl(url: NSURL?) {
var lower = url?.scheme?.lowercaseString
return lower == http || lower == https
}
}
Sadly I'm getting and error in the return line that I can't interprete:
Cannot invoke == with argument list of type `($T4, $T8)`
What I'm doing wrong?
You didn't specify the return type of the function.
lower is an optional and may be nul.
Why is it a class function?
Try it this way using a global function
func isValidUrl(url: NSURL?) - Bool {
if let lower = url?.scheme?.lowercaseString {
return lower == http || lower == https
}
return false
}
let foo = NSURL(string: some/string)
let bar = NSURL(string: http://some/string;)
isValidUrl(foo) // false
isValidUrl(bar) // true
I'd also rename the the function to hasHTTPScheme or something similar.
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Re: Create a NSURL as a way to validate urls - not working
On 3 Mar 2015, at 01:57, Jens Alfke j...@mooseyard.com wrote: On Mar 2, 2015, at 3:55 PM, Juanjo Conti jjco...@carouselapps.com mailto:jjco...@carouselapps.com wrote: Ok, I wanted to validate that the url is an absolute one. Is there something in Swift standard lib to do this? I typically check whether url.scheme is a non-nil, non-empty string. You may also want to check the scheme if you need to restrict input to HTTP URLs, for instance. (For example, “a:b” is a perfectly valid absolute URL, but probably not one your app will find useful.) Keep in mind that URL schemes are case-insensitive, so “HTTP:” means the same as “http:”. Also, this has nothing to do with the Swift library. NSURL is part of the Foundation framework, so this is independent of whether you’re using Swift or Objective-C. I’d say this is pretty good advice. The NSURL docs also used to mention an alternative, that you could test the -resourceSpecifier to see if it began with // as a pretty good test, but that’s no longer mentioned, which is intriguing. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Create a NSURL as a way to validate urls - not working
Ok, first of all thanks all for the replies.
I'm trying to solve it this an util class method:
import Cocoa
class Utils: NSObject {
class func isValidUrl(url: NSURL?) {
var lower = url?.scheme?.lowercaseString
return lower == http || lower == https
}
}
Sadly I'm getting and error in the return line that I can't interprete:
Cannot invoke == with argument list of type `($T4, $T8)`
What I'm doing wrong?
Thanks,
On Tue, Mar 3, 2015 at 6:19 AM, Mike Abdullah mabdul...@karelia.com wrote:
On 3 Mar 2015, at 01:57, Jens Alfke j...@mooseyard.com wrote:
On Mar 2, 2015, at 3:55 PM, Juanjo Conti jjco...@carouselapps.com wrote:
Ok, I wanted to validate that the url is an absolute one. Is there
something in Swift standard lib to do this?
I typically check whether url.scheme is a non-nil, non-empty string. You
may also want to check the scheme if you need to restrict input to HTTP
URLs, for instance. (For example, “a:b” is a perfectly valid absolute URL,
but probably not one your app will find useful.) Keep in mind that URL
schemes are case-insensitive, so “HTTP:” means the same as “http:”.
Also, this has nothing to do with the Swift library. NSURL is part of the
Foundation framework, so this is independent of whether you’re using Swift
or Objective-C.
I’d say this is pretty good advice. The NSURL docs also used to mention an
alternative, that you could test the -resourceSpecifier to see if it began
with // as a pretty good test, but that’s no longer mentioned, which is
intriguing.
--
Juanjo Conti jjconti http://goog_2023646312@carouselapps.com
jjco...@carouselapps.com
Software Engineer - Carousel Apps https://carouselapps.com
--
Carousel Apps Limited, registered in England Wales with registered number
7689440 and registered office Unit 2 Artbrand Studios, 7 Leathermarket
Street, London SE1 3HN. Any communication sent by or on behalf of Carousel
App Ltd or any of its subsidiary, holding or affiliated companies or
entities (together Watu) is confidential and may be privileged or
otherwise protected. If you receive it in error please inform us and then
delete it from your system. You should not copy it or disclose its contents
to anyone. Messages sent to and from Watu may be monitored to ensure
compliance with our internal policies and to protect our business. Emails
are not secure and cannot be guaranteed to be error free. Anyone who
communicates with us by email is taken to accept these risks.
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Create a NSURL as a way to validate urls - not working
According the docs ( https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSURL_Class/) NSURL(string: aString) will return nil if aString is malformed. But I've tried this in the a playground and no nil is returned: NSURL(string: )! NSURL(string: )! Why is this? are the docs wrong? Thanks in advance, -- Juanjo Conti jjconti http://goog_2023646312@carouselapps.com jjco...@carouselapps.com Software Engineer - Carousel Apps https://carouselapps.com -- Carousel Apps Limited, registered in England Wales with registered number 7689440 and registered office Unit 2 Artbrand Studios, 7 Leathermarket Street, London SE1 3HN. Any communication sent by or on behalf of Carousel App Ltd or any of its subsidiary, holding or affiliated companies or entities (together Watu) is confidential and may be privileged or otherwise protected. If you receive it in error please inform us and then delete it from your system. You should not copy it or disclose its contents to anyone. Messages sent to and from Watu may be monitored to ensure compliance with our internal policies and to protect our business. Emails are not secure and cannot be guaranteed to be error free. Anyone who communicates with us by email is taken to accept these risks. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Create a NSURL as a way to validate urls - not working
On 2 Mar 2015, at 23:22, Juanjo Conti jjco...@carouselapps.com wrote: According the docs ( https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSURL_Class/) NSURL(string: aString) will return nil if aString is malformed. But I've tried this in the a playground and no nil is returned: NSURL(string: )! NSURL(string: )! Why is this? are the docs wrong? Go read the specs NSURL references. An empty string and “” are both valid by its definition. Pretty much all NSURL is looking for is you’re not using any unsupported characters, or mis-using reserved characters. Anything more, and you’ve got to test the resulting URL yourself. Perhaps you can elaborate what you consider to be a valid URL in your case. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Create a NSURL as a way to validate urls - not working
On 3/2/2015 2:22 PM, Juanjo Conti wrote: According the docs ( https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSURL_Class/) NSURL(string: aString) will return nil if aString is malformed. But I've tried this in the a playground and no nil is returned: NSURL(string: )! NSURL(string: )! Why is this? are the docs wrong? Thanks in advance, The doc also states the URL format string conforms to RFC2396, which defines the term relative URI reference. That's what you are providing in this case, a relative URI reference; even a blank relative URI reference is allowed. Paul smime.p7s Description: S/MIME Cryptographic Signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Create a NSURL as a way to validate urls - not working
Ok, I wanted to validate that the url is an absolute one. Is there something in Swift standard lib to do this? Thanks in advance! On Mon, Mar 2, 2015 at 7:46 PM, Mike Abdullah mabdul...@karelia.com wrote: On 2 Mar 2015, at 23:22, Juanjo Conti jjco...@carouselapps.com wrote: According the docs ( https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSURL_Class/ ) NSURL(string: aString) will return nil if aString is malformed. But I've tried this in the a playground and no nil is returned: NSURL(string: )! NSURL(string: )! Why is this? are the docs wrong? Go read the specs NSURL references. An empty string and “” are both valid by its definition. Pretty much all NSURL is looking for is you’re not using any unsupported characters, or mis-using reserved characters. Anything more, and you’ve got to test the resulting URL yourself. Perhaps you can elaborate what you consider to be a valid URL in your case. -- Juanjo Conti jjconti http://goog_2023646312@carouselapps.com jjco...@carouselapps.com Software Engineer - Carousel Apps https://carouselapps.com -- Carousel Apps Limited, registered in England Wales with registered number 7689440 and registered office Unit 2 Artbrand Studios, 7 Leathermarket Street, London SE1 3HN. Any communication sent by or on behalf of Carousel App Ltd or any of its subsidiary, holding or affiliated companies or entities (together Watu) is confidential and may be privileged or otherwise protected. If you receive it in error please inform us and then delete it from your system. You should not copy it or disclose its contents to anyone. Messages sent to and from Watu may be monitored to ensure compliance with our internal policies and to protect our business. Emails are not secure and cannot be guaranteed to be error free. Anyone who communicates with us by email is taken to accept these risks. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Create a NSURL as a way to validate urls - not working
On Mar 2, 2015, at 4:55 PM, Juanjo Conti jjco...@carouselapps.com wrote:
Ok, I wanted to validate that the url is an absolute one. Is there
something in Swift standard lib to do this?
That depends on what you mean by validate. If you simply mean checking
whether it well-formed, you can do that easily with a regular expression match,
such as (written in email):
^http://(?:[a-z0-9-]+\.){1,}[a-z]{2,4}
HTH,
Keary Suska
Esoteritech, Inc.
Demystifying technology for your home or business
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Re: Create a NSURL as a way to validate urls - not working
On Mar 2, 2015, at 4:52 PM, Keary Suska cocoa-...@esoteritech.com wrote:
That depends on what you mean by validate. If you simply mean checking
whether it well-formed, you can do that easily with a regular expression
match, such as (written in email):
^http://(?:[a-z0-9-]+\.){1,}[a-z]{2,4}
It’s really much better to ask the system frameworks to do this kind of
checking/parsing, since they are more likely than you are to know all the
nuances of the RFCs. For instance, your regex above won’t work with
international domain names, or capitalized forms of domain names, or top-level
domains longer than 4 characters, or single-component domains like “foo”...
(I’m not saying this to pick on you, just warning people who might come across
this thread in a web-search and copy and paste your regex. I’m sure it would
also take me a while to write a regex that could reliably match domain names,
assuming I even decided to try; that’s part of my point.)
—Jens
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Re: Create a NSURL as a way to validate urls - not working
I think you want NSURLComponents. On 03 Mar 2015, at 00:55, Juanjo Conti jjco...@carouselapps.com wrote: Ok, I wanted to validate that the url is an absolute one. Is there something in Swift standard lib to do this? Thanks in advance! On Mon, Mar 2, 2015 at 7:46 PM, Mike Abdullah mabdul...@karelia.com wrote: On 2 Mar 2015, at 23:22, Juanjo Conti jjco...@carouselapps.com wrote: According the docs ( https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSURL_Class/ ) NSURL(string: aString) will return nil if aString is malformed. But I've tried this in the a playground and no nil is returned: NSURL(string: )! NSURL(string: )! Why is this? are the docs wrong? Go read the specs NSURL references. An empty string and “” are both valid by its definition. Pretty much all NSURL is looking for is you’re not using any unsupported characters, or mis-using reserved characters. Anything more, and you’ve got to test the resulting URL yourself. Perhaps you can elaborate what you consider to be a valid URL in your case. -- Juanjo Conti jjconti http://goog_2023646312@carouselapps.com jjco...@carouselapps.com Software Engineer - Carousel Apps https://carouselapps.com -- Carousel Apps Limited, registered in England Wales with registered number 7689440 and registered office Unit 2 Artbrand Studios, 7 Leathermarket Street, London SE1 3HN. Any communication sent by or on behalf of Carousel App Ltd or any of its subsidiary, holding or affiliated companies or entities (together Watu) is confidential and may be privileged or otherwise protected. If you receive it in error please inform us and then delete it from your system. You should not copy it or disclose its contents to anyone. Messages sent to and from Watu may be monitored to ensure compliance with our internal policies and to protect our business. Emails are not secure and cannot be guaranteed to be error free. Anyone who communicates with us by email is taken to accept these risks. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/witness.of.teachtext%40gmx.net This email sent to witness.of.teacht...@gmx.net Cheers, -- Uli Kusterer “The Witnesses of TeachText are everywhere...” http://zathras.de ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Create a NSURL as a way to validate urls - not working
On Mar 2, 2015, at 3:55 PM, Juanjo Conti jjco...@carouselapps.com wrote: Ok, I wanted to validate that the url is an absolute one. Is there something in Swift standard lib to do this? I typically check whether url.scheme is a non-nil, non-empty string. You may also want to check the scheme if you need to restrict input to HTTP URLs, for instance. (For example, “a:b” is a perfectly valid absolute URL, but probably not one your app will find useful.) Keep in mind that URL schemes are case-insensitive, so “HTTP:” means the same as “http:”. Also, this has nothing to do with the Swift library. NSURL is part of the Foundation framework, so this is independent of whether you’re using Swift or Objective-C. —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
