Using Deplhi TWebmodule with parameter

[JIMSMITH 0]

I created a webmodule and assigned an action pathinfo of /getname*. The question is how do I create parameters for values say parameters ssn and dob  would this become /getname/($ssn)/($dob)?  Would really appreciate clarity. 

 

[corneliusdavid 213]

2 hours ago, JIMSMITH said:

assigned an action pathinfo of /getname*

The pathname should not contain the asterisk, just /getname

2 hours ago, JIMSMITH said:

how do I create parameters for values say parameters ssn and dob  would this become /getname/($ssn)/($dob)?

You don't have to "create" the parameters, by simply accessing the URL with something like /getname?ssn=123456789&dob=19990531, the TWebActionItem parses out the URI and creates the parameters for you.  Then, you just access them in your event handler like this:

procedure TMyWebApp.ActionHandler(Sender: TObject; Request: TWebRequest; Response: TWebResponse; var Handled: Boolean);
var
  SSN: string;
  DOB: string;
begin
  if Request.QueryFields.Count >= 2 then
  begin
    SSN := Request.QueryFields.Values['ssn'];
    DOB := Request.QueryFields.Values['dob'];
    ...

The "?" starts the beginning of the list of parameters; the "&" separates the parameters.

 

On a side note, you should never pass private info this way (using the GET method on the URL); instead you should put them in a POST BODY. But that's a different topic.

[JIMSMITH 0]

9 hours ago, corneliusdavid said:

The pathname should not contain the asterisk, just /getname

You don't have to "create" the parameters, by simply accessing the URL with something like /getname?ssn=123456789&dob=19990531, the TWebActionItem parses out the URI and creates the parameters for you.  Then, you just access them in your event handler like this:

procedure TMyWebApp.ActionHandler(Sender: TObject; Request: TWebRequest; Response: TWebResponse; var Handled: Boolean);
var
  SSN: string;
  DOB: string;
begin
  if Request.QueryFields.Count >= 2 then
  begin
    SSN := Request.QueryFields.Values['ssn'];
    DOB := Request.QueryFields.Values['dob'];
    ...

The "?" starts the beginning of the list of parameters; the "&" separates the parameters.

 

On a side note, you should never pass private info this way (using the GET method on the URL); instead you should put them in a POST BODY. But that's a different topic.

Thanks for responding to my post.  This actually worked by removing the additional characters / symbols. 

Do you know why there are many examples the use other options in the pathinfo property?

Examples are:

/getname/*                   {seen in some youtube videos}

/getname/data/:id {thoughts are that id would be a parameter}

Now I am curious.

 

 

[corneliusdavid 213]

43 minutes ago, JIMSMITH said:

Do you know why there are many examples the use other options in the pathinfo property?

Examples are:

/getname/*                   {seen in some youtube videos}

/getname/data/:id {thoughts are that id would be a parameter}

I haven't used either of these in a WebBroker app but I think the asterisk will match any URI; for example, both /getname/list and /getname/edit.

 

I don't remember seeing ":id" on the end of PathInfo in any examples; not sure what that's for.

[JIMSMITH 0]

Okay.  Thanks for your assistance.

[hsvandrew 23]

Hi Jim,

 

To handle parameters built into the URL rather than as query parameters you'll need to do the following:

Assign a partial path to the 'pathInfo' of your WebModule Action i.e.

/getname/*

 

Then, in your ActionHandler you'll want to access the path part of the URL, break it into an array split by / and then execute based on the parts that matter

var paths: TArray<string> = Request.PathInfo.split(['/']);

//Check array length etc

if sameText(paths[2],'add') then //Do add function

else if sameText(paths[2],'delete') then //Do add function

object.delete( paths[3] );

 

Hope that makes sense. I haven't tested this exact code so there might be slight syntax issues.

[corneliusdavid 213]

59 minutes ago, hsvandrew said:

To handle parameters built into the URL rather than as query parameters you'll need to do the following:

Assign a partial path to the 'pathInfo' of your WebModule Action i.e.

/getname/*

 

Then, in your ActionHandler you'll want to access the path part of the URL, break it into an array split by / and then execute based on the parts that matter

What would be the benefit to doing this extra work rather than letting WebBroker parse it for you into QueryFields?

[JIMSMITH 0]

2 hours ago, corneliusdavid said:

What would be the benefit to doing this extra work rather than letting WebBroker parse it for you into QueryFields?

I'm just glad to know that there is a legitimate format / usage of the option that you specified.  I'm not quite sure how to specify the parameters in the url with the /getname/* option.  The other option was /getname?name=jim&zip=91001  Don't know how to implement the other.

[JIMSMITH 0]

4 hours ago, hsvandrew said:

Hi Jim,

 

To handle parameters built into the URL rather than as query parameters you'll need to do the following:

Assign a partial path to the 'pathInfo' of your WebModule Action i.e.

/getname/*

 

Then, in your ActionHandler you'll want to access the path part of the URL, break it into an array split by / and then execute based on the parts that matter

var paths: TArray<string> = Request.PathInfo.split(['/']);

//Check array length etc

if sameText(paths[2],'add') then //Do add function

else if sameText(paths[2],'delete') then //Do add function

object.delete( paths[3] );

 

Hope that makes sense. I haven't tested this exact code so there might be slight syntax issues.

I was never able to trigger the action with this implementation.  I will try again.  I don't think that I tried it properly.