B4J Question URL Routing?

[ilan]

hi

i would like to know how i can in the Server Handler map a dynamic url. something like this:

    'app.get('/users/:userId/books/:bookId',function (req,res){
    '    //...
    '})

url to call it: http://localhost:3000/users/34/books/8989

now i know i can add the * at the end of the handler url and do it like this:

srvr.AddHandler($"/users/*"$, "books", False)

and then call something like this:

http://localhost:3000/users?userid=0081&bookid=0021

and get the values like this:

Sub Handle(req As ServletRequest, resp As ServletResponse)
    Log(req.GetParameter("userid"))
    Log(req.GetParameter("bookid"))
    resp.Write("processing...")
End Sub

but my question is can i do it without adding the value keys in the url?

so i want to reach the handler with this URL: http://localhost:3000/users/34/books/8989
and not with this: http://localhost:3000/users?userid=0081&bookid=0021

this is what i found but cannot figure out what i need to do.

Jetty '{servlet}/{parameter}' url routing

I'm using jetty 9.0.3. How to map an URL such as www.myweb.com/{servlet}/{parameter} to the given servlet and parameter? For example, the URL '/client/12312' will route to clientServlet and its d...

stackoverflow.com

thanx, ilan

 

[DonManfred]

and get the values like this

you need to parse the commandstring by yourself.
See

B4J - jServer

 

[ilan]

you need to parse the commandstring by yourself.
See

B4J - jServer

yes, this solution is already known to me as I wrote above but according to the Stackoverflow thread we can edit the URL pattern in the web.xml file and maybe we can allow adding ":" to the URL and still direct to the correct server handler.

the question is can we edit the web.xml file? would that be the solution for this problem?
if not i still can parse the URL by myself.

thanx

 

[EnriqueGonzalez]

and then call something like this:

http://localhost:3000/users?userid=0081&bookid=0021
and get the values like this:

With the /users endpoint you can grab this url. The * is only for the endpoints not for the parameters

Anything beyond the ? Will get a parameter with req.getparameters

 

[ilan]

With the /users endpoint you can grab this url. The * is only for the endpoints not for the parameters

Anything beyond the ? Will get a parameter with req.getparameters

yes i understand that but is there a way to do it without adding the key & value inside the url?
like we can do it in NodeJS for example like this:

    'app.get('/users/:userId/books/:bookId',function (req,res){
    '    //...
    '})

and call the url like this: http://localhost:3000/users/34/books/8989

 

[EnriqueGonzalez]

No. Jetty only has the * and can only be used once per endpoint.

 

[ilan]

No. Jetty only has the * and can only be used once per endpoint.

ok thank you @EnriqueGonzalez but i do read that we can add a custom URL pattern to web.xml file of the jetty library and like this we maybe could add a patter that will accept : inside the url. what do you think would that be possible?

How to add application name in url bar with jetty server

Hi i have created a maven project with embedded jetty server which is executing fine. After getting jetty server started in eclipse console so to access welcome file (index.jsp) url could be someth...

stackoverflow.com

Jetty '{servlet}/{parameter}' url routing

I'm using jetty 9.0.3. How to map an URL such as www.myweb.com/{servlet}/{parameter} to the given servlet and parameter? For example, the URL '/client/12312' will route to clientServlet and its d...

stackoverflow.com

 

[EnriqueGonzalez]

Both links suggest to use /clients/* and it will catch client/323/book/6363.

What i mean and i think you mean is this one

How to create a multiple wildcard url pattern in web.xml?

How would one route the following path in Jetty ? /users/user_id/transactions/transaction_id I tried it this way: /users/*/transactions/* But I'm getting an error stating below : java.lang.

stackoverflow.com

As you can see jetty by design allows only the *

If you can catch this url client/323/book/6363
You can parse it manually, seems easy to do.

 

[ilan]

Both links suggest to use /clients/* and it will catch client/323/book/6363.

What i mean and i think you mean is this one

How to create a multiple wildcard url pattern in web.xml?

How would one route the following path in Jetty ? /users/user_id/transactions/transaction_id I tried it this way: /users/*/transactions/* But I'm getting an error stating below : java.lang.

stackoverflow.com

As you can see jetty by design allows only the *

If you can catch this url client/323/book/6363
You can parse it manually, seems easy to do.

ok, I understand so the only way is to parse the url.

thanx!

btw i was watching on the same page you posted above

 

[EnriqueGonzalez]

btw i was watching on the same page you posted above

I made the research months ago and arrived at that SO answer. At first i thought it was a deal breaker but after many projects it seems that you can live without that feature, it is not that important

 

[ilan]

I made the research months ago and arrived at that SO answer. At first i thought it was a deal breaker but after many projects it seems that you can live without that feature, it is not that important

yes, you are right, regex will do the job
thank you,

btw, i can see from other posts that u r very familiar with web apps and servers. good to have here specialists like you

 

[EnriqueGonzalez]

btw, i can see from other posts that u r very familiar with web apps and servers. good to have here specialists like you

Its my pleasure to help! I have experience with other webapps languages (ruby, elixir, javascript) but always come back to b4j

 

[ilan]

Its my pleasure to help! I have experience with other webapps languages (ruby, elixir, javascript) but always come back to b4j

i love javascript. i think JS is my second love after b4x

 

[Daestrum]

Example allows url to be
http://127.0.0.1:51042/dynamic/user/freddy/book/Aliens ate my cat.
http://127.0.0.1:51042/dynamic/book/Aliens ate my cat./user/freddy
but goes to only one handler routine..
Probably can be written better, but was just a test.

 

[TILogistic]

you wish?

Clean URL - Wikipedia

en.wikipedia.org

 

[ilan]

you wish?

Clean URL - Wikipedia

en.wikipedia.org

yes!

 

[EnriqueGonzalez]

Just made a topic on this here:

Spark Framework POC

Hi! so i was chatting with @ilan about the idea of having multiple entries on the url parameters. https://www.b4x.com/android/forum/threads/url-routing.133665/ Due my experience, i know this is not possible, until later in the day i found in some documentation on Stripe that Spark (jetty...

www.b4x.com

 

[aeric]

my question is can i do it without adding the value keys in the url?

You can achieve it using pretty URL:
For example: https://api.puterise.com:17179/user/view/3

The "key" elements are separated with a forward slash.

In B4J:

Dim elements() As String = Regex.Split("/", req.RequestURI)

First, I have predefine the patent.

ELEMENT_ROOT = 0
ELEMENT_CONTROLLER = 1
ELEMENT_ACTION = 2
ELEMENT_ID = 3

Then read the value of key by index.

    Select elements(Main.ELEMENT_ACTION)
        Case "view"
            If elements.Length - 1 = Main.ELEMENT_ID Then
                Select elements(Main.ELEMENT_ID)
                    Case "all"
                        View("all")
                    Case Else
                        View(elements(Main.ELEMENT_ID))
                End Select
            Else
                Response.SendError(500, "Unknown action")
            End If
        Case Else
            Response.SendError(500, "Unknown action")
            Return
    End Select

The code snippets above are part of my API Server project.

 

[aeric]

I hope this template can help you solve this problem.

[Project Template] [Web] API Server

Web API Server Version: 1.16 Description: Create Web API Server with CRUD functionalities Updates: Web API Server 2.0 is available https://www.b4x.com/android/forum/threads/project-template-web-api-server-2.143310/ Depends on following libraries: ByteConverter, JavaObject, jServer...

www.b4x.com