commit 56769079b04444e162ec4342c75474563c80ad6c
parent c0bab22016429736f011834d460429c168fe39da
Author: Simon Kornblith <simon@simonster.com>
Date: Sun, 6 Aug 2006 21:59:50 +0000
addresses #83, figure out how to implement OpenURL
Scholar.OpenURL.resolve(item) returns the URL that retrieves an item from the user's OpenURL resolver. this means we can implement a "find in my library" feature.
Scholar.OpenURL.discoverResolvers() returns a list of available resolvers for the user's current location (by IP address).
Diffstat:
2 files changed, 174 insertions(+), 2 deletions(-)
diff --git a/chrome/chromeFiles/content/scholar/xpcom/ingester.js b/chrome/chromeFiles/content/scholar/xpcom/ingester.js
@@ -141,4 +141,174 @@ Scholar.Ingester.ProxyMonitor = new function() {
var uri = ioService.newURI(url, null, null);
return uri;
}
+}
+
+Scholar.OpenURL = new function() {
+ this.resolve = resolve;
+ this.discoverResolvers = discoverResolvers;
+ this.createContextObject = createContextObject;
+
+ /*
+ * Returns a URL to look up an item in the OpenURL resolver
+ */
+ function resolve(itemObject) {
+ var co = createContextObject(itemObject, Scholar.Prefs.get("openURL.version"));
+ if(co) {
+ return Scholar.Prefs.get("openURL.resolver")+"?"+co;
+ }
+ return false;
+ }
+
+ /*
+ * Queries OCLC's OpenURL resolver registry and returns an address and version
+ */
+ function discoverResolvers() {
+ var req = Components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance();
+ req.open("GET", "http://worldcatlibraries.org/registry/lookup?IP=requestor", false);
+ req.send(null);
+
+ if(!req.responseXML) {
+ throw "Could not access resolver registry";
+ }
+
+ var resolverArray = new Array();
+ var resolvers = req.responseXML.getElementsByTagName("resolver");
+ for(var i=0; i<resolvers.length; i++) {
+ var resolver = resolvers[i];
+
+ var name = resolver.parentNode.getElementsByTagName("institutionName");
+ if(!name.length) {
+ continue;
+ }
+ name = name[0].textContent;
+
+ var url = resolver.getElementsByTagName("baseURL");
+ if(!url.length) {
+ continue;
+ }
+ url = url[0].textContent;
+
+ if(resolver.getElementsByTagName("Z39.88-2004").length > 0) {
+ var version = "1.0";
+ } else if(resolver.getElementsByTagName("OpenUrl 0.1").length > 0) {
+ var version = "0.1";
+ } else {
+ continue;
+ }
+
+ resolverArray[name] = [url, version];
+ }
+
+ return resolverArray;
+ }
+
+ /*
+ * Generates an OpenURL ContextObject from an item
+ */
+ function createContextObject(itemObject, version) {
+ var item = itemObject.toArray();
+
+ var identifiers = new Array();
+ if(item.DOI) {
+ identifiers.push(item.DOI);
+ }
+ if(item.ISBN) {
+ identifiers.push("urn:isbn:");
+ }
+
+ // encode ctx_ver (if available) and identifiers
+ if(version == "0.1") {
+ var co = "";
+
+ for each(identifier in identifiers) {
+ co += "&id="+escape(identifier);
+ }
+ } else {
+ var co = "ctx_ver=Z39.88-2004";
+
+ for each(identifier in identifiers) {
+ co += "&rft_id="+escape(identifier);
+ }
+ }
+
+ // encode genre and item-specific data
+ if(item.itemType == "journalArticle") {
+ if(version == "0.1") {
+ co += "&genre=article";
+ } else {
+ co += "&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article";
+ }
+ co += _mapTag(item.title, "atitle", version)
+ co += _mapTag(item.publicationTitle, (version == "0.1" ? "title" : "jtitle"), version)
+ co += _mapTag(item.journalAbbreviation, "stitle", version);
+ co += _mapTag(item.volume, "volume", version);
+ co += _mapTag(item.issue, "issue", version);
+ } else if(item.itemType == "book" || item.itemType == "bookitem") {
+ if(version == "0.1") {
+ co += "&genre=book";
+ } else {
+ co += "&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book";
+ }
+
+ if(item.itemType == "book") {
+ co += "&rft.genre=book";
+ co += _mapTag(item.title, (version == "0.1" ? "title" : "btitle"), version);
+ } else {
+ co += "&rft.genre=bookitem";
+ co += _mapTag(item.title, "atitle", version)
+ co += _mapTag(item.publicationTitle, (version == "0.1" ? "title" : "btitle"), version);
+ }
+
+ co += _mapTag(item.place, "place", version);
+ co += _mapTag(item.publisher, "publisher", version)
+ co += _mapTag(item.edition, "edition", version);
+ co += _mapTag(item.seriesTitle, "series", version);
+ } else if(item.itemType == "thesis" && version == "1.0") {
+ co += "&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation";
+
+ _mapTag(item.title, "title", version);
+ _mapTag(item.publisher, "inst", version);
+ _mapTag(item.thesisType, "degree", version);
+ } else {
+ return false;
+ }
+
+ // encode fields on all items
+ for each(creator in item.creators) {
+ if(creator.firstName) {
+ co += _mapTag(creator.firstName, "aufirst", version);
+ co += _mapTag(creator.lastName, "aulast", version);
+ } else {
+ co += _mapTag(creator.lastName, "aucorp", version);
+ }
+ }
+
+ if(item.date) {
+ co += _mapTag(item.date, "date", version);
+ } else {
+ co += _mapTag(item.year, "date", version);
+ }
+ co += _mapTag(item.pages, "pages", version);
+ co += _mapTag(item.ISBN, "ISBN", version);
+ co += _mapTag(item.ISSN, "ISSN", version);
+
+ if(version == "0.1") {
+ // chop off leading & sign if version is 0.1
+ co = co.substr(1);
+ }
+
+ return co;
+ }
+
+ function _mapTag(data, tag, version) {
+ if(data) {
+ if(version == "0.1") {
+ return "&"+tag+"="+escape(data);
+ } else {
+ return "&rft."+tag+"="+escape(data);
+ }
+ } else {
+ return "";
+ }
+ }
}
\ No newline at end of file
diff --git a/defaults/preferences/scholar.js b/defaults/preferences/scholar.js
@@ -2,4 +2,6 @@
// Display internal shortcut
pref("extensions.scholar.automaticScraperUpdates",true);
-pref("extensions.scholar.scholarPaneOnTop",false);
-\ No newline at end of file
+pref("extensions.scholar.scholarPaneOnTop",false);
+pref("extensions.scholar.openURL.resolver","http://athene.gmu.edu:8888/lfp/LinkFinderPlus/Display");
+pref("extensions.scholar.openURL.version","0.1");
+\ No newline at end of file
