Unable to load dynamic image into browser
"Marshintprop" <[email protected]> Mon, 24 Dec 2012 14:32:48 -0600
| Newsgroups | gmane.comp.python.image |
|---|---|
| Message-ID | <[email protected]> |
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I do not seem to have success in generating a dynamic image into Internet
Explorer through CGI. If I save the file and then load it, it works but
when I try to keep the generated image dynamic. I am using Python 2.6.5 and
the corresponding PIL library.
f = cStringIO.StringIO()
img.save(f, "PNG")
print "Content-type: image/png\n"
f.seek(0)
print f.read()
The above will just generate a screen filled with ascii characters and
symbols. I have also tried JPEG to no avail.
Below generates a blank image:
sys.stdout.write('Status: 200 OK\r\n')
sys.stdout.write('Content-type: image/png\r\n\n')
sys.stdout.write('%s' % f.getvalue())
sys.stdout.write('\r\n')
Can someone point out my error here? Writing to file in a cgi environment
is not a great thing to be doing. Img.sav('test.png') is valid.
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<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>I do not =
seem to have success in generating a dynamic image into Internet =
Explorer through CGI. If I save the file and then load it, it =
works but when I try to keep the generated image dynamic… I =
am using Python 2.6.5 and the corresponding PIL =
library.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal style=3D'background:#F3F3F3'><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>f =3D =
cStringIO.StringIO()<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:#F3F3F3'><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'>img.save(f, <span =
style=3D'color:green'>"PNG"</span>)<o:p></o:p></span></p><p =
class=3DMsoNormal style=3D'background:#F3F3F3'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></p><p class=3DMsoNormal =
style=3D'background:#F3F3F3'><b><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#0000C0'>print</span></b><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'> <span =
style=3D'color:green'>"Content-type: =
image/png\n"</span><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:#F3F3F3'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'>f.seek(0)<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:#F3F3F3'><b><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#0000C0'>print</span></b><span =
style=3D'font-size:10.0pt;font-family:"Courier New"'> =
f.read()<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:#F3F3F3'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p> </o:p></span></p><p class=3DMsoNormal>The above will =
just generate a screen filled with ascii characters and symbols. I =
have also tried JPEG to no avail.<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Below =
generates a blank image:<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>sys.stdout.write('Status: 200 =
OK\r\n')<o:p></o:p></p><p =
class=3DMsoNormal>sys.stdout.write('Content-type: =
image/png\r\n\n')<o:p></o:p></p><p =
class=3DMsoNormal>sys.stdout.write('%s' % f.getvalue())<o:p></o:p></p><p =
class=3DMsoNormal>sys.stdout.write('\r\n')<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Can someone =
point out my error here? Writing to file in a cgi environment is =
not a great thing to be doing. Img.sav(‘test.png’) is =
valid.<o:p></o:p></p></div></body></html>
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