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Tutorial about Uploading Files from WAP Cell Phones



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Today cell phones are becoming more and more powerful. Many of them can be used as a digital camera for taking pictures and recording video clips. With a cell phone that supports file upload, you can upload some pictures or video clips to a server, thus saving storage space of your cell phone. In this tutorial, we will provide you information about building a mobile Internet application that accepts file uploads from WAP-enabled cell phones.

We will begin the tutorial with an overview of how to upload files from a WAP cell phone. Then we will provide you an XHTML MP file upload example that works on both mobile browsers and web browsers like IE and Firefox.

At the server-side, a server-side technology is required to handle the HTTP request submitted from the client. ASP / ASP.NET, Java Servlet, JSP, Perl and PHP are some examples of commonly used server-side technologies. In this tutorial, we will cover how to use PHP and Java Servlet / JSP to handle file uploads. The techniques can be applied to both WAP and web applications.

At the end of the tutorial, we will discuss some of the security issues that you should pay attention to.


Table of Contents

Upload File from WAP Cell Phone

Overview

How to Upload Files from WAP Cell Phones

Nokia Cell Phones that Support WAP Upload

XHTML MP Example Demonstrating File Upload

Handling Form-based File Upload with PHP

Parsing Form Data and Getting Information about the Uploaded File with PHP

PHP Directives Related to (Large) File Upload

Checking for Errors

UPLOAD_ERR_INI_SIZE Error Code

UPLOAD_ERR_FORM_SIZE Error Code (Use with the MAX_FILE_SIZE Form Field)

UPLOAD_ERR_PARTIAL Error Code

UPLOAD_ERR_NO_FILE Error Code

UPLOAD_ERR_NO_TMP_DIR Error Code

UPLOAD_ERR_CANT_WRITE Error Code

Saving Uploaded Files on the File System with PHP (move_uploaded_file() Function)

Processing Contents of Uploaded Files with PHP

Retrieving Values of Ordinary Form Fields with PHP

Example PHP File Upload Script

Handling Form-based File Upload with Java Servlet or JSP

Downloading the Apache Jakarta Commons FileUpload and Commons IO Libraries

Installing Apache Jakarta Commons FileUpload and Commons IO into a Servlet/JSP Container Like Tomcat

Checking If an HTTP Request is Encoded in Multipart Format

Parsing Form Data with Java Servlet / JSP

Iterating through File Items

Retrieving Values of Ordinary Form Fields with Java Servlet / JSP

Getting Information about the Uploaded File with Java Servlet / JSP

Saving Uploaded Files in the File System with Java Servlet / JSP

Processing Contents of Uploaded Files with Java Servlet / JSP

Example JSP File Upload Script

Security Considerations of File Upload



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