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Input output to cgi scripts

Posted on 2000-03-28
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Last Modified: 2010-03-05
Hi, i am new to cgi programming, i have the following job to be done. I would appreciate if someone can help me.

I am developing a tool in perl for which i have to create a web interface.  User can log into the tool through netscape. Once user clicks input button a file dialog should open asking the user to choose a file as input to the tool(The input file will be in user home directory).  This input should be fed to perl scripts on the server to get output and the output file should be supplied to the user so that he can store it in his local disk. I hope i explained the problem clearly,i would appreciate if someone can help me.
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Question by:apaazue
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Expert Comment

by:treyjeff
ID: 2665045
What is the file that the user is entering?  Also, what is the perl script doing?
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Accepted Solution

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maneshr earned 300 total points
ID: 2665090
try this....

you will have to change the HTML file to point to your cgi directory and also change the location of the PERL interpreter as per your sytem.


=================input.html
<html>
<title>Accept file as input for tool</title>


<form action="/cgi-bin/upload.pl" method=post>
<B>Enter the input file </b>
<input name="input" type="file">
<P><input type=submit>
</form>
</html>

================upload.pl
#!/usr/local/bin/perl

use CGI;

$query=new CGI;

##  Read the file name that the user has entered
$DocLocation=$query->param('inp');

print "Content-type: text/html\n\n";

##  Read 1024 bytes at a time
while($bytesread=read($DocLocation,$data,1024)){
  $size+=$bytesread;  ##  Extra!! also count the size of the file
  $content.=$data;    ##  Store the ACTUAL file content
}
close($DocLocation);

##  Now that the full content of the file is...
##  ... in the content variable, you can do whatever...
##  ... manipulations you want and then just "throw" ...
##  ... the modified content back to the user!!

print "<B>$content has been uploaded</B><br>\n";
print "<B>Size = ",$size," byte(s)</B><BR>\n";
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Author Comment

by:apaazue
ID: 2665094
The user enter the input file that tool requires.  It will be in the disk of the user. the tool will parse it and takes required info from it.
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Author Comment

by:apaazue
ID: 2665113
Maneshr your comment is very intersting. As i said am new to cgi please confirm if your code works in the situation which i presented in my next comment. i.e The file is located in the user machine not on the server.   It has to be transported from user machine to remote server where perl scripts are running.
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Expert Comment

by:maneshr
ID: 2665315
definately the script will read the entire contents of the file that the user wants and send it to the server. once at the server, you can do any processing to that content and send back the processed results to the users browser or let the user save them to his PC.
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Expert Comment

by:maneshr
ID: 2709424
apaazue,

is there anything that i missed out on? pl. let me know.
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Author Comment

by:apaazue
ID: 2709557
sure/////////////////
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