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Extracting Files from your CGI application
This section shows you how to use the CGIParser object within
your C++ CGI scripts to upload files. Assuming that you
have an HTML form set up and pointing to your script, and
CGIParser installed, here are the steps you need to take.
We will assume that the field name for the uploaded file
- Include the cgiparser.h header file in your application.
- Obtain the global CGIParser
- See if the expected field contains a file - otherwise
the submitter never chose a file and left it blank.
if ( parser.isFile("testfile")
// then a file was submitted
- Assuming they have uploaded a file, obtain the information
const char *filename
const char *original_path = parser.filepath("testfile");
const char *content_type = parser.contenttype("testfile");
const char *datalength = parser.length("testfile");
const char *filedata = parser.value("testfile");
Example CGI Scripts
Example CGI Script - Giving them back what they gave
This script allows a user to upload a file, and immediately
download it again. It is the perfect way to make sure
you get back what you submitted. The name of the compiled
executable should be "example.exe".
Download the source code: example.cpp.
Example CGI Script - Uploading and saving a file
This script allows a user to upload a file, and puts
the file on the server in a directory called "data".
You must create the data directory before this will work.
If you are on linus, set the permissions of the data directory
to 777 for the purpose of this example.The name of the
compiled executable should be "example2.exe".
Download the source code: example2.cpp.
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