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Topic: Loading image from URL question (Read 2462 times) |
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itpshiffman
 
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Loading image from URL question
« on: Nov 11th, 2003, 12:47am » |
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Hello all -- i'm writing a little thing which loads an image from the net, i.e.:
b = loadImage("http://207.251.86.248/cctv26.jpg");
It works 100% a-ok within the proce55ing IDE, but once I publish it to an applet it's no good. . I've done it w/ java before (and i had to do it differently than just loading a local file), but not with proce55ing. . Anyone have any suggestions?
Thanks!
Dan
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| « Last Edit: Nov 11th, 2003, 12:49am by itpshiffman » |
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arielm
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Re: Loading image from URL question
« Reply #1 on: Nov 11th, 2003, 12:57am » |
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you can't directly load files that are not at the same "codebase" than your applet (unless it's a signed applet...)
one solution is to have the images located at the right places,
but if the goal is to have access to random images from the web, i think it's a matter of using a server-side script (php, cgi...) that will handle the redirection properly.
(can't help you with that one, but i think you can find some related posts in this forum, using the built-in search engine...)
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Ariel Malka | www.chronotext.org
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itpshiffman
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Re: Loading image from URL question
« Reply #2 on: Nov 11th, 2003, 8:46pm » |
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Thanks for the response. I used python to load an image (from a URL) and output it via a CGI in the applet's local directory -- works like a charm. If anyone is interested, here's the code:
----------------------------
#!/usr/bin/python
import urllib
print "Content-Type: image/jpeg"
print
image = urllib.urlopen("PUT IMAGE URL HERE")
print image.read()
----------------------------
Assuming the CGI is named "IMG.cgi" and is stored in the applet's local directory, you can then simply say:
b = loadImage("IMG.cgi");
If you wanted to get really crazy, you could make the URLpath a parameter passed to the CGI. . .
Rock n' roll!
Dan
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Jerronimo
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Re: Loading image from URL question
« Reply #3 on: Nov 11th, 2003, 8:49pm » |
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It wasn't until i read this solution that I understood the problem.
Good to know though... I want to do a sketch that picks random photos i've taken and do something with them.
No idea what yet though...
but this is a piece of that puzzle that I'll be needing. 
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REAS
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Re: Loading image from URL question
« Reply #4 on: Nov 13th, 2003, 8:34pm » |
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Hello Dan. Thank you for posting this.
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bren
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Re: Loading image from URL question
« Reply #5 on: Nov 28th, 2003, 4:18pm » |
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I did something similar in PHP for Flash thing I did that loaded in NYC webcam pictures: http://www.brendandawes.com/manhattan/
You need to have the GD Image Library installed with PHP but here's the script should anybody want it:
Code:
<?php
// parameters
// w = width of image
// h = height of image
// url = the url of the image
function LoadJPEG ($imgURL) {
$fp = fopen($imgURL, "rb");
if($fp){
while (!feof($fp))
{
$imageFile.= fread($fp, 1024);
}
}
fclose ($fp);
$tmpfname = tempnam ("/temp", "IMG");
$fp = fopen($tmpfname, "w");
fwrite($fp, $imageFile);
fclose($fp);
$width = $w;
$height = $h;
$im = imagecreate($width,$height);
$image = ImageCreateFromJpeg($tmpfname);
$imagedata = getimagesize($tmpfname);
imagecopyresized ($im, $image, 0, 0, 0, 0, $width, $height, $imagedata[0], $imagedata[1]);
Header("Content-type: image/jpeg");
imagejpeg($im, '', 90);
##-- Delete Temporary File --##
unlink($tmpfname);
##-- Check for errors --##
if (!$im) {
print "Could not create JPEG image $imgURL";
}
return $im;
}
$imageData = LoadJPEG($url);
?>
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Hope someone finds it useful.
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