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Python
Sending binary data over CGI
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<blockquote data-quote="Walter Huf" data-source="post: 1753339"><p>Okay, I'm busy making a wonderful cgi program, and everything is working </p><p>wonderfully so far. I'm using the standard cgi library and the Cookie </p><p>library and they have been a huge help. Thanks to those who have created </p><p>them!</p><p>However, if I try to send binary data, like jpgs, through cgi, the data </p><p>gets corrupted in a very small manner. Whenever my program sends the </p><p>character 10, it gets converted to character 13+character 10. I found out </p><p>this only happens when I send data to stdout. If I send the data to a </p><p>standard file object, it works fine. However, with the stdout, the problem </p><p>arises.</p><p>Here is the relevant part of the code:</p><p>---Begin</p><p>from sys import stdout</p><p>def senddownloaddata(file): #file is a pointer to an open file</p><p> line=file.read(1) #file pointer opening and closing are</p><p> while len(line)==1: # handled outside of function</p><p> stdout.write(line)</p><p> line=file.read(1)</p><p> stdout.write(line)</p><p>---End</p><p>Now the code that copies files:</p><p>---Begin</p><p>curdir="C:\windows\desktop"</p><p>temp=file(curdir+"/bach.it","rb",0)</p><p>out=file(curdir+"/bach2.it","wb",0)</p><p>data=temp.read(1)</p><p>while len(data)==1:</p><p> out.write(data)</p><p> data=temp.read(1)</p><p>temp.close()</p><p>out.close()</p><p>---End</p><p></p><p>I'm using Windows 98 SE with an Apache 2.0.44 Win32 server. That all works </p><p>fine. The first line of the interactive script says:</p><p>PythonWin 2.3.2 (#49, Nov 13 2003, 10:34:54) [MSC v.1200 32 bit (Intel)] on </p><p>win32.</p><p>I'm assuming that means I have Python 2.3.2. Everything else in the program </p><p>works very nice, except for the data corruption.</p><p></p><p>Please help me with this problem. It has me stumped.</p><p>Thanks in advance!</p><p></p><p>--Walter Huf--</p><p><a href="mailto:hufman@cobalty.com">hufman@cobalty.com</a></p></blockquote><p></p>
[QUOTE="Walter Huf, post: 1753339"] Okay, I'm busy making a wonderful cgi program, and everything is working wonderfully so far. I'm using the standard cgi library and the Cookie library and they have been a huge help. Thanks to those who have created them! However, if I try to send binary data, like jpgs, through cgi, the data gets corrupted in a very small manner. Whenever my program sends the character 10, it gets converted to character 13+character 10. I found out this only happens when I send data to stdout. If I send the data to a standard file object, it works fine. However, with the stdout, the problem arises. Here is the relevant part of the code: ---Begin from sys import stdout def senddownloaddata(file): #file is a pointer to an open file line=file.read(1) #file pointer opening and closing are while len(line)==1: # handled outside of function stdout.write(line) line=file.read(1) stdout.write(line) ---End Now the code that copies files: ---Begin curdir="C:\windows\desktop" temp=file(curdir+"/bach.it","rb",0) out=file(curdir+"/bach2.it","wb",0) data=temp.read(1) while len(data)==1: out.write(data) data=temp.read(1) temp.close() out.close() ---End I'm using Windows 98 SE with an Apache 2.0.44 Win32 server. That all works fine. The first line of the interactive script says: PythonWin 2.3.2 (#49, Nov 13 2003, 10:34:54) [MSC v.1200 32 bit (Intel)] on win32. I'm assuming that means I have Python 2.3.2. Everything else in the program works very nice, except for the data corruption. Please help me with this problem. It has me stumped. Thanks in advance! --Walter Huf-- [email]hufman@cobalty.com[/email] [/QUOTE]
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