P
projecktzero
Well, I've managed to get an image into a postgre database, but now I'm
having trouble getting it out.
#! /usr/bin/env python
from pyPgSQL import PgSQL
def main():
connectdb = PgSQL.connect('server
ort:database:usernameassword')
cur = connectdb.cursor()
sqlStatement = """SELECT image from images where image_id = 1"""
cur.execute(sqlStatement)
rec = cur.fetchone()
# TODO make temp file name include image_id.
# TODO use tempfile module
# TODO clean up old temp files
tempFileName = "1.jpg"
tempFile = open(tempFileName, "w")
tempFile.write(rec[0])
tempFile.close()
cur.close()
print "Content-type: text/html\n\n"
print """"<?xml version="1.0" encoding="windows-1250"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1250" />
<title></title>
</head>
<body>
<img src="1.jpg">
</body>
</html>
"""
if __name__ == '__main__':
main()
Traceback (most recent call last):
File "./dispimage.py", line 39, in ?
main()
File "./dispimage.py", line 16, in main
tempFile.write(rec[0])
TypeError: argument 1 must be string or read-only character buffer, not
instance
So, rec[0] is an instance, but an instance of what? Since I needed to
use the PgSQL.PgBytea method on the image before inserting it into the
database, do I need to use a similar method to undo what PgBytea did to
it, or am I incorrectly writing this binary data? I tried
PgSQL.PgUnQuoteBytea(rec[0]), but that didn't work.
Can anyone show me the TypeError of my ways? Is there a good example
somewhere that shows getting binary data out of a database?
Thanks.
having trouble getting it out.
#! /usr/bin/env python
from pyPgSQL import PgSQL
def main():
connectdb = PgSQL.connect('server
ort:database:usernameassword')cur = connectdb.cursor()
sqlStatement = """SELECT image from images where image_id = 1"""
cur.execute(sqlStatement)
rec = cur.fetchone()
# TODO make temp file name include image_id.
# TODO use tempfile module
# TODO clean up old temp files
tempFileName = "1.jpg"
tempFile = open(tempFileName, "w")
tempFile.write(rec[0])
tempFile.close()
cur.close()
print "Content-type: text/html\n\n"
print """"<?xml version="1.0" encoding="windows-1250"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1250" />
<title></title>
</head>
<body>
<img src="1.jpg">
</body>
</html>
"""
if __name__ == '__main__':
main()
Traceback (most recent call last):
File "./dispimage.py", line 39, in ?
main()
File "./dispimage.py", line 16, in main
tempFile.write(rec[0])
TypeError: argument 1 must be string or read-only character buffer, not
instance
So, rec[0] is an instance, but an instance of what? Since I needed to
use the PgSQL.PgBytea method on the image before inserting it into the
database, do I need to use a similar method to undo what PgBytea did to
it, or am I incorrectly writing this binary data? I tried
PgSQL.PgUnQuoteBytea(rec[0]), but that didn't work.
Can anyone show me the TypeError of my ways? Is there a good example
somewhere that shows getting binary data out of a database?
Thanks.