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About the sample
This sample demonstrates a file upload/download/preview application with the use of several features available in the WSO2 Data Services Server. Some notable functions are listed below.
- Streaming Support : With the data streaming functionality, when a service client makes a request, the result is streamed to the service client rather than building the full result in the server and returning it. This allows virtually unlimited payload sizes in the result, and the response is instantaneous to the client.
- Binary Data : Binary data is handled using Base64 encoding to store and retrive non-textual data, such as data files and BLOB fields in databases.
Service description
The sample data service used here (FileService) transfers and retrieves file data between the client and a database. The list of queries used by the data service to carry out the actions are as follows.
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By combining functionality of the above queries, we can create a sample file management system with the use of data services. See About Data Services and Resources for a definition of data services, queries and operations.
Building the sample
The sample data service, FileService should be deployed using the instructions in Samples Setup.
Running the sample
To execute the application, you have to run the ant file_service_app command as described in the Data Services Clients section.
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