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/* liblivejournal - a client library for LiveJournal.
* Copyright (C) 2003 Evan Martin <evan@livejournal.com>
*/
liblivejournal is currently only used by LogJam, so this will be brief.
liblivejournal depends on glib 2 and libxml 2:
- http://www.gtk.org
- http://www.xmlsoft.org
and the library generally follows the conventions and style used throughout
glib:
- functions namespaced with lj_foo, datatypes with LJFoo.
- GError for errors.
The goal of liblivejournal is to provide wrappers around two fundamental parts
of LiveJournal:
1) the data structures (LJUser, LJServer, LJFriend);
2) the protocol (LJLogin, LJGetFriends).
=== Data Structures ===
The data structures are mostly structs that contain the relevant fields.
There are also #defines and enums where appropriate. libxml is used to
provide a standard serialization format for LiveJournal entries.
=== Protocol ===
The protocol support in liblivejournal comes in two layers:
a) the generic protocol wrapper;
b) function-specific wrappers.
The generic protocol wrapper is a medium-level interface to LJ requests:
the user passes in hashes and receives hashes in return. The details of
the network (HTTP, proxies) are left to the user of the library, which
only deals with strings provided to and returned from the network layer.
#include <livejournal/(function).h>
The function-specific wrappers are the high-level interface to LJ
requests; the user passes in parameters and receives liblivejournal data
structures in return. Conceptually, the abstract base class of a
protocol request is an LJVerb, and then the specific request types are
subclasses. Network requests follow this pattern:
- construct a request object, via lj_foo_new();
- run the POST request, retrieved via lj_request_to_string(), using
your own platform/project-specific network code;
- feed the response back into the request object via
lj_verb_handle_response();
- use the request object as needed and free it with lj_foo_free().
For examples, see the tests (which are more like examples anyway) in
tests/.
- Evan Martin, 03 Aug 2003
vim: tw=72
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