Form Validation
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Form Validation
by Gantois on Sun Aug 03, 2014 1:27 am
Good morning Brian!
I have doubt about how to perform validation methods in a form before call a page declared in "action".
At first I created a scripted file (login.dyalog) with its validation methods within, using action="login.dyalog" (form tag) and changing to action="abc.dyalog" after validation. I have had some problems to call this page without pressing submit button again.
By other side I read about onSubmit event in a form tag to call validation function in java script before execute the page declared in "action", but I would like to use apl functions/methods.
What would be the right way? Certainly I will use it in almost all my forms. Could you help me with an example?
Thanks,
Marco
I have doubt about how to perform validation methods in a form before call a page declared in "action".
At first I created a scripted file (login.dyalog) with its validation methods within, using action="login.dyalog" (form tag) and changing to action="abc.dyalog" after validation. I have had some problems to call this page without pressing submit button again.
By other side I read about onSubmit event in a form tag to call validation function in java script before execute the page declared in "action", but I would like to use apl functions/methods.
What would be the right way? Certainly I will use it in almost all my forms. Could you help me with an example?
Thanks,
Marco
- Gantois
- Posts: 89
- Joined: Thu Apr 17, 2014 9:44 am
Re: Form Validation
by Brian|Dyalog on Sun Aug 03, 2014 10:53 pm
Hi Marco!
If I understand your question, I think there are a couple ways to accomplish what you're trying to do.
One way is to use a <meta> tag in the response's <head> to redirect the user to abc.dyalog. I've coded an example of this below.
Another technique would be to use AJAX and attach a 'click' handler to the submit button. MiServer's AJAX interface (we call it APLJAX), can conditionally send a JavaScript snippet to redirect to abc.dyalog.
I hope this helps!
If I understand your question, I think there are a couple ways to accomplish what you're trying to do.
One way is to use a <meta> tag in the response's <head> to redirect the user to abc.dyalog. I've coded an example of this below.
Another technique would be to use AJAX and attach a 'click' handler to the submit button. MiServer's AJAX interface (we call it APLJAX), can conditionally send a JavaScript snippet to redirect to abc.dyalog.
I hope this helps!
- Code: Select all
:Class login : MiPage
⍝ define the variable to bind the form's input elements to
:field public uid←''
:field public pwd←''
:field public submit←''
:include #.HTMLInput
∇ r←Render req;f
:Access public
r←''
:If submit≡'Login' ⍝ did the user press the submit button?
:If uid pwd≡'marco' 'pass' ⍝ validate the credentials
⍝↓↓↓ this inserts a <meta> element into the response's <head> element
⍝ which will redirect to abc.dyalog after pausing 0 seconds
req.Meta'http-equiv="refresh" content="0;URL=/abc.dyalog"'
:Return
:Else ⍝ credentials did not validate
r,←BRA'*** Invalid login!'
uid←pwd←submit←'' ⍝ reset the form variables
:EndIf
:EndIf
r,←'h2'Enclose'Please login:'
f←BRA'Userid: ','uid'Edit'' ⍝ uid input element
f,←BRA'Password: ','pwd'Password'' ⍝ pwd input element
f,←'submit'Submit'Login' ⍝ submit button
r,←req('post'Form)f ⍝ wrap inputs in a form
∇
:EndClass
-
Brian|Dyalog - Posts: 120
- Joined: Thu Nov 26, 2009 4:02 pm
- Location: West Henrietta, NY
Re: Form Validation
by Gantois on Mon Aug 04, 2014 7:38 pm
Brian,
I used your first recommendation <meta> tag with success.
Thanks again,
Marco
I used your first recommendation <meta> tag with success.
Thanks again,
Marco
- Gantois
- Posts: 89
- Joined: Thu Apr 17, 2014 9:44 am
Re: Form Validation
by Gantois on Wed Aug 06, 2014 11:31 pm
Hi Brian!
I am using some txt files typed in notepad++ editor in my MiSite as the following: ex: html←#.Files.GetText req.Server.Root,'Styles\abc.txt'
Although the characters typed on that editor are visually right, some of them are changed on web page. Could you help me in this case? (My APL is 13.2 64 Unicode)
Thanks,
Gantois
I am using some txt files typed in notepad++ editor in my MiSite as the following: ex: html←#.Files.GetText req.Server.Root,'Styles\abc.txt'
Although the characters typed on that editor are visually right, some of them are changed on web page. Could you help me in this case? (My APL is 13.2 64 Unicode)
Thanks,
Gantois
- Gantois
- Posts: 89
- Joined: Thu Apr 17, 2014 9:44 am
Re: Form Validation
by Brian|Dyalog on Thu Aug 07, 2014 2:21 pm
Hi Gantois!
Without more information, like what specifically looks different :), I can guess that you've got some characters in your file that are known as HTML entities - these are reserved characters in HTML.
Try using #.HTMLInput.HtmlSafeText to convert your text to a "safe" format.
I hope this helps!
/Brian
Without more information, like what specifically looks different :), I can guess that you've got some characters in your file that are known as HTML entities - these are reserved characters in HTML.
Try using #.HTMLInput.HtmlSafeText to convert your text to a "safe" format.
html←#.Files.GetText #.HTMLInput.HtmlSafeText req.Server.Root,'Styles\abc.txt'I hope this helps!
/Brian
-
Brian|Dyalog - Posts: 120
- Joined: Thu Nov 26, 2009 4:02 pm
- Location: West Henrietta, NY
Re: Form Validation
by Gantois on Thu Aug 07, 2014 4:43 pm
Hy Brian,
Sorry, but I am learning miserver, html, css and OOP together, and I’m trying to practice English too … perhaps I will be crazy :) … but I am motivated and having goods results in my site, with your help of course.
Following more information about my problem:
In some cases I am using notepad++ editor to type txt files (html) as part of my MiServer pages, for example: welcome page and .txt files with some blocks of html. Every characters are recognized by notepad editor (and apl editor too) but after using #.Files.GetText or #.Files.GetText #.HTMLInput.HtmlSafeText, some characters are not recognized by browser. Examples:
Before: After:
Preparação Preparação
vários vários
Thanks,
Marco
Sorry, but I am learning miserver, html, css and OOP together, and I’m trying to practice English too … perhaps I will be crazy :) … but I am motivated and having goods results in my site, with your help of course.
Following more information about my problem:
In some cases I am using notepad++ editor to type txt files (html) as part of my MiServer pages, for example: welcome page and .txt files with some blocks of html. Every characters are recognized by notepad editor (and apl editor too) but after using #.Files.GetText or #.Files.GetText #.HTMLInput.HtmlSafeText, some characters are not recognized by browser. Examples:
Before: After:
Preparação Preparação
vários vários
Thanks,
Marco
- Gantois
- Posts: 89
- Joined: Thu Apr 17, 2014 9:44 am
Re: Form Validation
by Brian|Dyalog on Sat Aug 09, 2014 2:49 am
Hi Marco!
It sounds like the file is in UTF-8 format and #.Files.GetText only reads simple ASCII or ANSI files. So, there are a couple of possible solutions:
/Brian
It sounds like the file is in UTF-8 format and #.Files.GetText only reads simple ASCII or ANSI files. So, there are a couple of possible solutions:
- If possible, save the file as ANSI. You'll find that under the Encoding menu item in NotePad++
- Use ⎕SE.UnicodeFile.ReadText to read the file.
/Brian
-
Brian|Dyalog - Posts: 120
- Joined: Thu Nov 26, 2009 4:02 pm
- Location: West Henrietta, NY
Re: Form Validation
by PGilbert on Sat Aug 09, 2014 11:59 am
Hello Marco, you can use .Net to read your files back into your workspace. If your file is saved in Unicode the following can be used:
If you are using the default encoding on your computer, the following can be used:
In both cases if there is an error, it can be retrieved with ⎕EXCEPTION.Message
You can read more about System.Text.Encoding here.
The file handle is guaranteed to be closed by this method, even if exceptions are raised.
Good luck
- Code: Select all
⎕USING←',mscorlib.dll'
System.IO.File.ReadAllText(⊂,file_name)
If you are using the default encoding on your computer, the following can be used:
- Code: Select all
⎕USING←',mscorlib.dll'
System.IO.File.ReadAllText((⊂,file_name),(System.Text.Encoding.Default))
In both cases if there is an error, it can be retrieved with ⎕EXCEPTION.Message
You can read more about System.Text.Encoding here.
The file handle is guaranteed to be closed by this method, even if exceptions are raised.
Good luck
-
PGilbert - Posts: 440
- Joined: Sun Dec 13, 2009 8:46 pm
- Location: Montréal, Québec, Canada
Re: Form Validation
by Gantois on Mon Aug 11, 2014 12:24 pm
Hi Brian and PGilbert,
I tested all recommendations and all worked correctly
Thanks very much for your help
Marco Gantois
I tested all recommendations and all worked correctly
Thanks very much for your help
Marco Gantois
- Gantois
- Posts: 89
- Joined: Thu Apr 17, 2014 9:44 am
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