X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Ftransports%2Fjsonp.js;fp=src%2Ftransports%2Fjsonp.js;h=2bdce2390c48486445411606efa25f0dedab6880;hb=ab3ba4a81252c4357a7aab5f24d765d41d47986e;hp=0000000000000000000000000000000000000000;hpb=29616e60c88bf300f4b2ee4ad1a89a8ac6481027;p=jquery.git

diff --git a/src/transports/jsonp.js b/src/transports/jsonp.js
new file mode 100644
index 0000000..2bdce23
--- /dev/null
+++ b/src/transports/jsonp.js
@@ -0,0 +1,89 @@
+(function( jQuery ) {
+
+var jsc = jQuery.now(),
+	jsre = /\=\?(&|$)/,
+	rquery = /\?/;
+
+// Default jsonp callback name
+jQuery.ajaxSettings.jsonpCallback = function() {
+	return "jsonp" + jsc++;
+};
+
+// Normalize jsonp queries
+// 1) put callback parameter in url or data
+// 2) ensure transportDataType is json
+// 3) ensure options jsonp is always provided so that jsonp requests are always
+//    json request with the jsonp option set
+jQuery.xhr.prefilter( function(s) {
+	
+	var transportDataType = s.dataTypes[0];
+	
+	if ( s.jsonp ||
+		transportDataType === "jsonp" ||
+		transportDataType === "json" && ( jsre.test(s.url) || typeof(s.data) === "string" && jsre.test(s.data) ) ) {
+
+		var jsonp = s.jsonp = s.jsonp || "callback",
+			jsonpCallback = s.jsonpCallback =
+				jQuery.isFunction( s.jsonpCallback ) ? s.jsonpCallback() : s.jsonpCallback,
+			url = s.url.replace(jsre, "=" + jsonpCallback + "$1"),
+			data = s.url == url && typeof(s.data) === "string" ? s.data.replace(jsre, "=" + jsonpCallback + "$1") : s.data;
+			
+		if ( url == s.url && data == s.data ) {
+			url = url += (rquery.test( url ) ? "&" : "?") + jsonp + "=" + jsonpCallback;
+		}
+		
+		s.url = url;
+		s.data = data;
+		
+		s.dataTypes[0] = "json";
+	}
+	
+});
+
+// Bind transport to json dataType
+jQuery.xhr.bindTransport("json", function(s) {
+
+	if ( s.jsonp ) {
+		
+		// Put callback in place
+		var responseContainer,
+			jsonpCallback = s.jsonpCallback,
+			previous = window[ jsonpCallback ];
+			
+		window [ jsonpCallback ] = function( response ) {
+			responseContainer = [response];
+		};
+		
+		s.complete = [function() {
+
+			// Set callback back to previous value
+			window[ jsonpCallback ] = previous;
+			
+			// Call if it was a function and we have a response
+			if ( previous) {
+				if ( responseContainer && jQuery.isFunction ( previous ) ) {
+					window[ jsonpCallback ] ( responseContainer[0] );
+				}
+			} else {
+				// else, more memory leak avoidance
+				try{ delete window[ jsonpCallback ]; } catch(e){}
+			}
+			
+		}, s.complete ];
+				
+		// Use data converter to retrieve json after script execution
+		s.dataConverters["script => json"] = function() {
+			if ( ! responseContainer ) {
+				jQuery.error("Callback '" + jsonpCallback + "' was not called");
+			}
+			return responseContainer[ 0 ];
+		};
+		
+		// Delegate to script transport
+		return "script";
+		
+	}
+
+});
+
+})(jQuery);