URI 是 Movian Plugin 的入口，本篇文章分析 URI 的实现
addURI
plugin object
addURI: function(re, callback) {
var page = require('movian/page');
return new page.Route(re, callback);
},page
exports.Route = function(re, callback) {
this.route = require('native/route').create(re, function(pageprop, sync, args) {
try {
// First, convert the raw page prop object into a proxied one
pageprop = prop.makeProp(pageprop);
// 将参数拆分出来，传入 fun 中执行
// Prepend a Page object as first argument to callback
args.unshift(new Page(pageprop, sync, false));
callback.apply(null, args);
} catch(e) {
if(!prop.isZombie(pageprop)) {
throw e;
} else {
console.log("Page at route " + re + " was closed, error supressed");
}
}
});
}URI 执行流程
在 Movian 输入 ted:start 之后的流程
11:15:19.974: navigator [INFO ]: Opening search:ted:start
11:15:19.975: ted [DEBUG]: Opening route ^ted:start
[prop directory {"persistent", "previous", "how", "close", "url", "parentUrl", "directClose", "eventSink", "bookmarked", "model", "glw"}]
false
[object Object]
11:15:19.975: HTTP [INFO ]: Connect to www.ted.com:443
newest
Newest
11:30:06.881: navigator [INFO ]: Opening ted:index:funny:Funny
11:30:06.881: ted [DEBUG]: Opening route ^ted:index:(.*):(.*)
11:30:06.881: ted [DEBUG]: Page argument 1 : funny
11:30:06.881: ted [DEBUG]: Page argument 2 : Funny
[prop directory {"persistent", "previous", "how", "close", "url", "parentUrl", "directClose", "eventSink", "bookmarked", "model", "glw"}]
false
[object Object],funny,Funnynav_open0 ->nav_open_backend ->nav_open_thread ->backend_open ->be_open ->ecmascript_openuri 完成参数的解析，传入函数中执行
static backend_t be_ecmascript = {
.be_flags = BACKEND_OPEN_CHECKS_URI,
.be_open = ecmascript_openuri,
.be_search = ecmascript_search,
};
BE_REGISTER(ecmascript);void backend_register(backend_t *be)
{
LIST_INSERT_HEAD(&backends, be, be_global_link);
}
#define BE_REGISTER(name) \
INITIALIZER(backend_init_ ## name) { \
backend_register(&be_ ## name); \
}因此 be_ecmascript 注册到链表 be 中
搜索 URI ted:no locatedb_search
12:45:04.096: navigator [INFO ]: Opening search:ted:nouri
12:45:04.097: FA [DEBUG]: Searcher: ted:nouri: executing "locate -i -L -q -b 'ted:nouri'"
12:45:06.085: FA [DEBUG]: Searcher: ted:nouri: Done
12:45:22.445: Callout [DEBUG]: /data/OpenSourceCode/movian/src/upnp/upnp_event.c:150 executed for 1497161us
12:45:24.057: Callout [DEBUG]: /data/OpenSourceCode/movian/src/upnp/upnp_event.c:150 executed for 1405651us
12:45:31.823: ted [DEBUG]: Search for ted:no was closed, error supressed
12:45:31.823: rutracker [DEBUG]: Search for ted:no was closed, error supressednav_open0 ->nav_open_backend ->nav_open_thread ->backend_open ->be_open ->locatedb_search ->fa_searcher ->
examples
plugin.addURI(plugin.getDescriptor().id + ":index:(.*):(.*)", function(page, sort, title) {
setPageHeader(page, plugin.getDescriptor().title + ' - Sorted by: ' + decodeURIComponent(title));
scraper(page, BASE_URL + '/talks?sort=' + sort);
});
plugin.addURI(plugin.getDescriptor().id + ":start", function(page) {
setPageHeader(page, plugin.getDescriptor().title + ' - Sort by:');
page.loading = true;
var doc = showtime.httpReq(BASE_URL + '/talks').toString();
page.loading = false;
var sort = doc.match(/<optgroup label="Sort by([\s\S]*?)<\/optgroup>/)[1];
// 1-uri component, 2-title
var re = /<option value="([\s\S]*?)">([\s\S]*?)<\/option>/g;
var match = re.exec(sort);
while (match) {
// sort: match[1] title: encodeURIComponent(match[2])
// 与上面的 URI re 是对应的 plugin.getDescriptor().id + ":index:(.*):(.*)"
page.appendItem(plugin.getDescriptor().id + ':index:' + match[1] + ':' + encodeURIComponent(match[2]), "directory", {
title: match[2]
});
match = re.exec(sort);
}
});