COM with Chrome in C/S mode

Hi Daniel,

have you tried using Uniface HTML widget, which being based on CEF library, is the same engine used from Chrome?

If you would like to simply get from internet a page (or an xml or a json...) why not using UHTTP component which is implementing an http/https request/response round trip? It is by far more simple! There are examples into documentation.

Regards,
Gianni

Hello Gianni,

Thanks for your response.

In fact the HTML Widget  is limited in some aspects.

Some functions for the JS widgets are voluntary disabled:  like export to PDF for example.

As we need the export functions for ke JS libraries we want tu use, , we are trying  to use directely a browser chrome for exple.

Do you think it's can be possible or a hard way to do that ?

Thks 

Daniel

Hi Daniel,

AFAIK there isn't any COM support in Chrome...

I've understood you would like:
- open a specific internet page
- export the screen content into a PDF document, probably as an image

If yes, just as a quick idea: could you embed that specific page in a dedicated HTML frameset?

The external frameset part contains your program logic while the internal part(s) the specific internet page you need to save.

Does it makes sense?

Regards,
Gianni

UHTTP component?

I don't know this technic...  😔

Where could I find detailled examples ?

Hi Daniel,

more info on UHTTP HERE for U10.3 and HERE for U9.7.

Regards,
Gianni

Hi Daniel,

We encountered a similar issue with using a web application which generates reports that the user can dynamically change and then export to PDF.

We can not use here UHTTP to download PDF  because the request use COOKIES and many other context value.

To keep this functioning by displaying this application in the HTML widget, we have injected some javascript code into the web page which downloads the file, cuts it, encodes it in base 64 and send it  to UNIFACE end then create the file wth filedump function. 

The solution is not very pretty, slow and the file must not exceed a size .

So as soon as possible we prefer to use HTTP to download files.

Gilles.

Javascript :

 downloadFile = function (sUrl) {
        var http_request = new XMLHttpRequest();
        http_request.onreadystatechange = function () {
            if (http_request.readyState == 4) {
                var array = new Uint8Array(http_request.response);
                 createLocalFile(array);
            }
        }
        http_request.open("GET", sUrl, true);
        http_request.responseType = 'arraybuffer';
        http_request.send();
    };

    createLocalFile = function (array) {
        var len = array.byteLength;
        var partOfFile = "";
		var file = "HW" + (new Date()).getTime(); 
		window.unifaceTriggers("dumpFile", file, 1, 1, ""); 
        for (var i = 0; i < len; i++) {
            partOfFile += String.fromCharCode(array[i]);
            if (i % 5e6 == 0 && i > 0) {
                window.unifaceTriggers("dumpFile", file, 0, 1, btoa(partOfFile));
                partOfFile = "";
            }
        }
        if (partOfFile.length > 0) {
            window.unifaceTriggers("dumpFile", file, 0, 1, btoa(partOfFile));
            partOfFile = "";
        }
        window.unifaceTriggers("openLocalFile", "", file);
    };


Code uniface :

trigger dumpFile
Params
	string pFileName: IN
	numeric pNew : IN
	string pContent : IN
endParams
Variables
	string lDossier
	raw content
	lineardatetime currentDate
EndVariables
content=$decode("BASE64",pContent)
lDossier=$concat($ldir(),"download\\",$processinfo("pid"),"\\")
if(pNew==1)
	if($lfileexists($concat(lDossier,"/",pFileName))==1)
		lfiledelete $concat(lDossier,"/",pFileName)
	endif
endif
if(pContent!="")
	lfiledump/append/raw Content,$concat(lDossier,"/",pFileName)
endif

end