  Web services are widely used in many areas via callable APIs, however, data
are not always available in this way. We always need to get some data from web
pages whose structure is not in order. Many developers use web data extraction
methods to generate wrappers to get useful contents from websites and convert
them into well-structured files. These methods, however, are designed
specifically for professional wrapper program developers and not friendly to
users without expertise in this domain. In this work, we construct a service
wrapper system to convert available data in web pages into web services.
Additionally, a set of algorithms are introduced to solve problems in the whole
conversion process. People can use our system to convert web data into web
services with fool-style operations and invoke these services by one simple
step, which greatly expands the use of web data. Our cases show the ease of
use, high availability, and stability of our system.
