Consistent user experience when offline

In modern graphical applications, a good user experience is clearly dependent upon great design and a high level of quality, but it's also important to handle network and service failures. In the Network resources and caching section of this chapter, we covered, caching of server responses to be more fault tolerant and to speed up application loading, but that's a small portion of a larger strategy for great offline support.

Caching responses

The response caching code introduced earlier in this chapter can be applied to almost all HTTP requests, but we only used it for HTTP GET. Of the many different types of HTTP requests, only three are deemed to be cacheable (GET, HEAD,...