Web Development

Push data continuously from server to client

17-Jul-02 8:11

You'll have to use some trickery to get two decimal places deep. And, leave the value as a string only converting when needed; otherwise, a trailing zero could be dropped.

// result
x = 726.9
// we want two decimal places so add ten tens in decimal (hundred)
x = Math.round(x * 100);
// manually insert the decimal place into the integer
x = String(x);
x = x.substring(0, x.length-2) + "." + x.substr(x.length-2, 2);

Jeremy Falcon
Imputek

<nobr>"..." - Paul Watson 07-17

Binary by ASP

17-Jul-02 2:57

I obtain a variant VT_ARRAY | VT_UI1 from a COM in an ASP script. I need to write the content of the variant as a response to the client.
How could i do it?

rechi

Re: Binary by ASP

Chris Maunder17-Jul-02 20:16

Chris Maunder

17-Jul-02 20:16

Response.BinaryWrite

cheers,
Chris Maunder

Nityananda16-Jul-02 6:29

Nityananda

16-Jul-02 6:29

Hi,
I want to have a web service which reads data continuosly from an external hardware(eg rpm) on a serial port and returns a byte array.
I want to access this data from a aspx file. The problem is that since it is continuous data, i have to call the web service in a loop.. and this creates 100% cpu load.

Is there a better way to do it ?. I heard that there is pushlet technology in java where the server contiuosly sends data to the client (Javascript).. is there an equivalent in .net ?

In summary is there any way that the server could send data to the client continuosly without the client requesting for the data in a loop?

Thanks for any help. Confused | :confused:

Nityananda

ASP Hit Counter

Chris J. LaQuerre15-Jul-02 14:08

Chris J. LaQuerre

15-Jul-02 14:08

I am looking to add a hit counter to an Intranet Site and was curious of the best way to do this. The only requirement is that each user should only be counted 1 time per day.

The only page that we need to track is the home page. However, if we could EASILY add a counter to all pages on our site such as adding some code to the footer on our site (which is automatically pulled into all pages through SSI) then we would be willing to do things that way.

Does anyone have any code that might be useful to me?

Chris LaQuerre
Internet Technologies Consultant

Re: ASP Hit Counter

Christopher Lord15-Jul-02 21:12

Christopher Lord

15-Jul-02 21:12

write a function called GetPageCount which simply gets the page count from a database or a file, increment it, and then saves it again. Then return the incremented value. Adding things like IP blocking will simply need some extra work.

Then, you can add this to the SSI and it will start counting.

<%=GetPageCount()%>

How Do I Avoid Refresh

Pradhip15-Jul-02 11:26

Pradhip

15-Jul-02 11:26

Hi Folks..

Im using multiple forms ie form1 and form2 in my web page(html page) and each of the form submits its values to seperate asp pages.Now after the asp pages process the values i have to comeback top this webpage.

So i use response.redirect and sometimes server.transfer from the asp page to come back the html page.and my question is how do

i avoid the page from being refreshed. i mean my webpage has some pictures(say pic1) in them and they all belong to form1 and they get changed when the user changes it to say pic2.

But now its refreshed becos form2 was submitted and comes back to the html page then my form1 has picture1 while i want it to have picture2..

Do i have to use of ispostback or some propery like that to make the page understand that it has to kind of maintain its state.

Why Need Parking lots in Bars when Drunken Driving is Prohibited

Why Need Parking lots in Bars when Drunken Driving is Prohibited

Re: How Do I Avoid Refresh

Jeremy Falcon16-Jul-02 9:51

16-Jul-02 9:51

You can't avoid a refresh in code. I've used soem trickery in frames to have the browser look like it's not refreshing, but this is a request sent by the browser to the web server and not your page.

In short, you'll have to save the state.

Jeremy Falcon
Imputek

<nobr>"The happy people are those who are producing something; the bored people are
those who are consuming much and producing nothing." - William Ralph Inge

Send my own POST

alex.barylski15-Jul-02 11:24

15-Jul-02 11:24

I have encountered a scenerio where I need the ability to customize a form method="post", but I cannot use this method.

Basically I need to know if it's possible using JScript to generate my own post's without using forms.

I cannot use get (open a new window w/ custom URL created in JScript) too much data.

I also would like to avoid using cookies for transmission of data....is this possible?

Thanx in advance!

Cheers! Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Jeremy Falcon16-Jul-02 10:03

16-Jul-02 10:03

You'll have to send raw HTTP information directly to the server to avoid using <form ... method="post">. I would avoid this if at all possible.

You don't need to have visible form elements at all if you are trying to pass a value. For instance...

<form action="something.html" target="_new" method="post" name="frmMain">
    <input type="hidden" name="mydata" value="this is so like my data">
    <a href="javascript:frmMain.submit();">Clickety</a>
</form>

This will send the information without displaying anything but the link (anchor) in the browser.

What is it exactly you are wanting to do? There may be another way. If not, I'll outline some details on using raw HTTP data.

Jeremy Falcon
Imputek

<nobr>"The happy people are those who are producing something; the bored people are
those who are consuming much and producing nothing." - William Ralph Inge

alex.barylski16-Jul-02 11:23

16-Jul-02 11:23

Just send data in form fields to the server without using form tag, cookies or encoded URL's...

Pushing raw http data is the only way I see available.

How would I go abouts doing this and why would you recommend me not using this approach...so long as I do it correctly is see no worries...???

Thanx again!

Cheers Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Jeremy Falcon17-Jul-02 3:43

17-Jul-02 3:43

Hockey wrote:
Just send data in form fields to the server without using form tag, cookies or encoded URL's...

From a web page or from a program? Netscape won't even render form elements unless they are enclosed in form tags. And the default method is GET, so unless you specify otherwise you won't be able to POST the data.

Jeremy Falcon
Imputek

<nobr>"The happy people are those who are producing something; the bored people are
those who are consuming much and producing nothing." - William Ralph Inge

alex.barylski17-Jul-02 22:06

17-Jul-02 22:06

From a webpage using JScript.

I've used text elements before without wrapping them in form tags in NS6+ and it worked fine.

I find in IE form tag just adds padding and causes alignment issues sometimes...

Plain and simple I hate form tags...

Thanx again! Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Jeremy Falcon18-Jul-02 4:04

18-Jul-02 4:04

Hockey wrote:
I've used text elements before without wrapping them in form tags in NS6+ and it worked fine.

Yes, but NS 1.x, 2.x, 3.x, and 4.x won't as not using the form tag is improper. NS 6.x renders closer to the way IE does. Test and ye shall see. Smile | :)

Hockey wrote:
I find in IE form tag just adds padding and causes alignment issues sometimes...

That is true, my solution is to place the form tags inside tags that will not render on a web page - like between table data tags.

<table cellspacing="0" cellpadding="0" border="0">
    <tr>
        <form>
        <td>
            Put the form elements and other stuff here!
        </td>
        </form>
    </tr>
</table>

This will stop the extra crap from rendering.

Jeremy Falcon
Imputek

<nobr>"..." - Paul Watson 07-17

alex.barylski18-Jul-02 12:00

Re: Send my own POST (edit)

18-Jul-02 12:00

Jeremy Falcon wrote:
Yes, but NS 1.x, 2.x, 3.x, and 4.x

Holy...your that cross browser friendly...???

I only bother with NS6+ sometimes don't even bother with that...

Anyways...do you know of any method available in JScript for sending raw http data or can this not be accomplished???

Cheers Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Jeremy Falcon19-Jul-02 4:33

Re: Send my own POST (edit)

19-Jul-02 4:33

Hockey wrote:
Anyways...do you know of any method available in JScript for sending raw http data or can this not be accomplished???

Client-side is impossible because HTTP header information is sent to the browser first. This is before any client code is even touched. [edit]To send data to the server via a script you can use a form, stick with GET, or execute a server-side program.[/edit] On the server-side you have to use ASP, PHP, SSI, CGI, a raw HTTP stream, etc. to manipulate the header information (which contains the POST data).

What I don't get is that knowing you can use the form tag to pull this off and stop from the extra stuff from rendering, why do you still not want to use it? Confused | :confused:

Jeremy Falcon
Imputek

<nobr>"..." - Paul Watson 07-17

alex.barylski19-Jul-02 10:50

Re: Send my own POST (edit)

19-Jul-02 10:50

Jeremy Falcon wrote:
What I don't get is that knowing you can use the form tag to pull this off and stop from the extra stuff from rendering, why do you still not want to use it?

Just an idea i've been toying with for an article here on CP...IMO it's super cool...

I'll prolly have to use cookies now tho...

Cheers! Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Jeremy Falcon19-Jul-02 11:05