Starting from WebRainbow v1.4, there are following 8 functions for file uploading.

The three of them are related to the settings for file uploading:

• SetMaxUploadFiles
• SetMaxFormDataForFileUpload
• SetTempDirectory

Calling these functions are optional, WebRainbow has the default value for these settings.

The other five functions makes application easy to handle the uploaded files:

• CountUploadFiles
• GetUploadFileName
• GetUploadFileSize
• GetUploadFileType
• SaveUploadFileAs

The application can use one or more of these functions to deal with uploaded files based on the application's requirement.

Demo:

Here, the sample program demoFileUpload shows how to use these functions to process the files uploaded from the HTML page.

• In the procedure Sub ProcessUpload(), the first called WebRainbow function is SpecityContentType to specify the application accepts the MIME type of "Multipart/Form-data" only. This is the only type of HTML page used for file uploading.

• Next, the Sub ProcessUpload() uses SetContentLength with the constant clRetrieveAllData to let WebRainbow process all the data passed in by the browser.

• Then the Sub ProcessUpload() calls SetMaxUploadFiles to set maximun number of files to be processed to 12. So after 12 files processed, all the other file(s), if there are any remaining files, is/are discarded.

• And calls SetTempDirectory to specify the temporary directory which is used for holding the file(s) during the process.

• The next several lines of code are going to get total number of processed upload files, retrieve the name of each file and save them to the specified location with given name.

To make this sample program demoFileUpload more usefull, there are other procedures for file listing and file downloading functionalities.

Note:

• The VB source code demoFileUpload.bas is for Visual Basic 6 & 5 only, Visual Basic 4 32-bit version is not included.

To compile this sample, follow the steps listed bellow:

1. Start Visual Basic

2. Select Standard EXE as project type

3. Select Sub Main as Startup Object

4. Give demoFileUpload as project name

5. Set reference to WRHttpB.tlb, WRMimeB.tlb, and WRnbwB.tlb

6. Remove Form1, which is the default form for new VB project

7. Add demoFileUpload.bas (source code for Visual Basic 5 & 6) into the Project demoFileUpload. This file is normally in the folder

        C:\Program Files\WebRainbow\demo\fileupload\

   if you did not change the installation directory for WebRainbow.

8. Compile it to demoFileUpload.exe.

To debug HttpPost:

• Click on Debug in VB IDE for detailed instruction.

To run this sample, click on the following link for instruction of

• running this sample on IIS

• running this sample on Apache