On 31. des. 2013 07:40, Olaf Radicke wrote:
>> "Carsten A. Arnholm" <[email protected]> hat am 31. Dezember 2013 um 03:44
>> The result is that the image fills the whole browser window, everything
>> else is gone. Somehow, the image data is supposed be placed where the
>> img-tag is, like you explained. But it isn't in this case, and what if
>> there were several img-tags in the page? Where is the image supposed to
>> go then?
>>
>> Somehow there must be a match between the name of the image in html and
>> the "name" of the data returned, but the exact technique eludes me.
>
> I have a question: Do you have two components? Components A) is shipping
> the image file - Right? And components B) is calling components A) in a
> HTML site with img tag? Right?
Hi Olaf!
What I have now is a single application (with a main program) containing
an integrated component ("hello"). All of the Tntnet related work is
done in this application.
But I also have a shared object which is completely independent of
Tntnet, it actually has a class that provides the image data. I wanted
to check that I could separate general shared images (*.so) and provode
a "Web GUI" layer using Tntnet. My test shows that this is working as I
hoped.
So my Application contains the Tntnet component "hello" (the only
component). There is a hello.ecpp containing the html code I showed.
hello.ecpp
=========
<%pre>
// put your includes here
#include <iostream>
#include "filepicker/file_collection.h"
</%pre>
<%args>
// define the query parameters
int arg1 = -1;
</%args>
<%session>
// define your session scope variables here
// std::string mySessionState;
</%session>
<%cpp>
// put your C++ code here
file_collection collection;
collection.collect_files("/tmp/Kontor");
std::string image_data;
if(arg1 > -1) {
if(collection.get_file_data(arg1,image_data)) {
reply.setContentType("image/jpeg");
reply.out() << image_data;
cout << " image data sent" << endl;
}
}
</%cpp>
<html>
<head>
<title>Tntnet-application hello</title>
</head>
<body bgcolor="black" text="White" link="yellow" Vlink="yellow">
<h1>hello</h1>
<p>Hello Tntnet world!</p>
<table>
<tr> <td>
<form>
<input type="text" name="arg1" value="<$arg1$>">
</form>
</td> </tr>
<tr> <td> <img src="/theimage.jpg"> </td> </tr>
</table>
</body>
</html>
===
The essential part of main is;
try {
tnt::Tntnet app;
app.listen("0.0.0.0", port);
app.mapUrl("^/$", "hello").setPathInfo("/hello");
app.mapUrl("^/(.*)$", "$1");
std::cout << "The web application is found at http://localhost:";
<< port << "/hello" << std::endl;
app.run();
}
catch (const std::exception& e)
{
std::cerr << e.what() << std::endl;
}
====
Happy new year to you all!
Best regards
Carsten Arnholm
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