| Author |
picture sent in http with base64
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| Zbigniew Lisiecki 2006-12-03, 6:57 pm |
| Hi,
to provide visual confirmation for
http://beztajemnic.evot.org/index.php?s=1
my server is sending data:image/png;base64 in the http protocoll.
This allows to omit writting picture data on the disk,
actually this part of the disk is read only.
With my KDE/konqueror and Firefox under Linux I can see the
correct picture, but some clients don't see it.
How could I correct this error ?
thank you in advance
Zbyszek
--
http://zbyszek.evot.org
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| Zbigniew Lisiecki schrieb:
> Hi,
> to provide visual confirmation for
> http://beztajemnic.evot.org/index.php?s=1
> my server is sending data:image/png;base64 in the http protocoll.
> This allows to omit writting picture data on the disk,
> actually this part of the disk is read only.
>
> With my KDE/konqueror and Firefox under Linux I can see the
> correct picture, but some clients don't see it.
> How could I correct this error ?
>
> thank you in advance
> Zbyszek
First I would try to make sure the html is correct:-)
<img src="data:image/png;.... name="vconf.png"
is missing: ", after adding it I see "smover" :-)
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| Zbigniew Lisiecki 2006-12-03, 6:57 pm |
| Ric wrote:
> Zbigniew Lisiecki schrieb:
>
> First I would try to make sure the html is correct:-)
>
> <img src="data:image/png;.... name="vconf.png"
>
> is missing: ", after adding it I see "smover" :-)
Yes Ric,
is my html correct now ?
z
--
http://zbyszek.evot.org
| |
|
| Zbigniew Lisiecki schrieb:
> Ric wrote:
>
>
> Yes Ric,
> is my html correct now ?
> z
Well the image is there now, but you still got some errors:-)
If I open Firefoxs Error-Console I can see two messages, complaining
about a unknown property: boder-top
Should be: border-top
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| Zbigniew Lisiecki 2006-12-03, 6:57 pm |
| Ric wrote:
> Zbigniew Lisiecki schrieb:
>
> Well the image is there now, but you still got some errors:-)
>
>
> If I open Firefoxs Error-Console I can see two messages, complaining
> about a unknown property: boder-top
> Should be: border-top
yes, I'v corrected this.
I am happy the picture is there.
Do you think it can be seen in all browsers now ?
z
--
http://zbyszek.evot.org
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| Michael Fesser 2006-12-03, 6:57 pm |
| ..oO(Zbigniew Lisiecki)
>to provide visual confirmation for
>http://beztajemnic.evot.org/index.php?s=1
>my server is sending data:image/png;base64 in the http protocoll.
>This allows to omit writting picture data on the disk,
>actually this part of the disk is read only.
>
>With my KDE/konqueror and Firefox under Linux I can see the
>correct picture, but some clients don't see it.
>How could I correct this error ?
IE doesn't support data URLs.
Micha
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| Zbigniew Lisiecki 2006-12-03, 9:57 pm |
| Michael Fesser wrote:
> .oO(Zbigniew Lisiecki)
>
>
> IE doesn't support data URLs.
It means you don't see the picture, do you ?
What is the correct solution on the read-only server fs then ?
z
--
http://zbyszek.evot.org
| |
| Zbigniew Lisiecki 2006-12-03, 9:57 pm |
| Michael Fesser wrote:
> .oO(Zbigniew Lisiecki)
>
>
> IE doesn't support data URLs.
It means you don't see the picture, do you ?
What is the correct solution on the read-only server fs then ?
The way i do now is:
function gen_rand_img () {
...
ob_start (NULL, 4096);
imagepng($img);
imagedestroy($img);
return (base64_encode(ob_get_clean()));
}
$head="
<!doctype html public \"-//w3c//dtd html 4.0 transitional//EN\">
<html>
<head>
<title>...</title>
<meta http-equiv=\"Content-Type\" content=\"text/html;
charset=iso-8859-2\"
....";
echo $head;
header("Cache-Control: no-store, no-cache, must-revalidate"); //http/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache"); // HTTP/1.0
....
echo "
echo "<img src=\"data:image/png;base64,".gen_rand_img()."\"
name=\"vconf.png\">";
z
--
http://zbyszek.evot.org
| |
| Zbigniew Lisiecki 2006-12-03, 9:57 pm |
| Michael Fesser wrote:
> .oO(Zbigniew Lisiecki)
>
>
> IE doesn't support data URLs.
It means you don't see the picture, do you ?
What is the correct solution on the read-only server fs then ?
The way i do it now is:
function gen_rand_img () {
...
ob_start (NULL, 4096);
imagepng($img);
imagedestroy($img);
return (base64_encode(ob_get_clean()));
}
$head="
<!doctype html public \"-//w3c//dtd html 4.0 transitional//EN\">
<html>
<head>
<meta http-equiv=\"Content-Type\" content=\"text/html;
charset=iso-8859-2\"
....";
echo $head;
header("Cache-Control: no-store, no-cache, must-revalidate"); //http/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache"); // HTTP/1.0
....
echo "<img src=\"data:image/png;base64,".gen_rand_img()."\"
name=\"vconf.png\">";
z
--
http://zbyszek.evot.org
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| Zbigniew Lisiecki 2006-12-04, 3:57 am |
| Zbigniew Lisiecki wrote:
> It means you don't see the picture, do you ?
sorry,
I corrected this for MSIE allowing to write png image to the filesystem.
To test the original problem now you have to change your brower
identification.
Now I hope everybody can see the picture.
z
--
http://zbyszek.evot.org
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| Michael Fesser 2006-12-04, 6:57 pm |
| ..oO(Zbigniew Lisiecki)
>Zbigniew Lisiecki wrote:
>
>I corrected this for MSIE allowing to write png image to the filesystem.
>To test the original problem now you have to change your brower
>identification.
>
>Now I hope everybody can see the picture.
Looks OK. Opera and Firefox get the "embedded" image, while IE shows the
PNG. But why don't you just drop the data URL and use the PNG for all
browsers? This is more reliable and would avoid browser sniffing.
Micha
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