Google's API test service uses WSDL (Web Services Description Language) and SOAP (Simple Object Access Protocol) standards, so developers can link their applications regardless of the computer language -- such as Java or Visual Studio .Net -- used to program them. But since the service launched five days ago, several people in the software development community have adapted code so that APIs can be developed in alternate programming languages, including Perl and Ruby. Web developers can only retrieve 10 "hits" at a time, performing 1,000 searches a day only on the Web. But developers are encouraged by the prospect of having access to Google's vast collection of images, directory links, news archives and newsgroups. One potential application could be an automatic query of the day's hot topic using Google News, a database of newspaper headlines and excerpts in test phase at the site. Another offshoot could be based on a query of Web documents related to a single day in history. If Google's APIs take off, the benefits could extend far beyond the company to the Web at large, according to Web developers, who said the move could provide a big boost for ballyhooed, but still mostly theoretical, Web services. By allowing Web sites and applications to sync up or share data to build new systems or sites, Google's APIs could provide the clearest example yet of how Web services will actually work. And that, proponents say, could inspire valuable developments in the Web community, including forcing other software developers such as Microsoft to follow suit. "Believe me, we're going to get tired of the Google box," said Dave Winer, publisher of a Web log and head of software company UserLand. "It's not at the core of what they released, but it says maybe they'll expose some functionality that is useful. It opens up the conversation." Even Winer acknowledges that the experiment faces some hurdles, especially if the APIs mature into robust applications that Google can tap for revenues. Because it uses SOAP, the Cheshire project's Sanderson said Google could hit a snag because of a hotly debated proposal to extend patent rights to Web standards, a possibility that he describes as a "dark cloud looming" over the experiment. Already Winer and others predict that Google will charge for various applications of the service. But Sanderson predicted that API users might not only have to pay Google for better access to its database -- they also might have to pay companies such as Microsoft and IBM to use the mechanism for performing such searches. He added that the patent owners have yet to state any sort of terms that they would consider a "reasonable and nondiscriminatory license." Nelson Minar, lead software engineer on Google's API project, said that while it's too early to tell what kinds of applications will evolve out of the experiment, interest is high. He said that after only four days, 10,000 developers signed up to use the API service. In addition, he said that 15 or 20 libraries for various programming languages have been created. "The possibilities are limitless," Minar said. "Our idea is to provide the raw material for the developer community, and (they) will come to us with creative applications that use our Web API." Real-time searches?
Winer, for one, is enthralled by Google's willingness to let developers collaborate on ideas. In the act of introducing APIs, Google has changed the status of some people from users to developers, and that could open a dialog to allow for real-time "crawling" of the Web. This means that eventually Web publishers such as CNN or Web loggers could notify Google's search engine every time data on their Web page is updated. Then Google could automatically verify the command and index the page on the fly. "They could open themselves to that kind of notification and verification so they would provide up-to-the-minute search capability," said Winer, who predicts that one day Google or another search provider will offer a service for the home computer. Google chief executive Eric Schmidt has already said real-time search results are a priority for the company, which launched in 1998. In the last year, the company improved its search technology to begin indexing sites for news organisations such as CNN and The New York Times that change more frequently. Previously, it crawled the Web every 30 days or so. Like other developers, the Cheshire project's Sanderson believes the test is valuable for the future of interoperable applications, allowing for seamless embedding of Google's resources into other programs through multiple platforms and standards. For example, Sanderson said the Google APIs could allow his project to create applications that search both traditional library catalogues as well as the entire Web from a single command. "Now not only can you find the books available on the topic, but also Web sites which might offer relevant information, and in a uniform interface rather than having to search the library, open a new browser window, and then search Google," he said. "Students in particular will find this useful when researching papers," he added. Others, while interested, are more sceptical. Aaron Straup Cope, one developer who wrote a script for APIs in Perl, said he sees the move as validation for distributed computing or Web services, but he added, "I doubt that (APIs) will make the Earth move." "Being able to 'plug' Google-ness in to your Web site will, if nothing else, provide an example of 'distributed computing' that is not as abstract as those that have come before it," Cope said. He also cited the development of cross-publishing functionality in Web logs. Cope said Google's APIs give further credence to the concept of an "Internet operating system," where people can pull in or manipulate content via a remote function as a page is being published. "That is, there is a growing interconnectedness among pages, sites (and) applications." Still, Cope predicted many of the problems that plague Web sites such as bandwidth limitations will hamper broader adoption. "Not everyone has a thousand servers like Google does," he said.
ZDNet UK's Developer News Section delivers the latest headlines together with the best UK jobs, right to your browser.
Have your say on all developer topics. From j2ee, to C++, from Visual Basic to Javascript plus much more. Share your experience with others on the Developers Forum.
Let the editors know what you think in the Mailroom.
