Make relative hrefs work

src/servo/content.rs

@@ -131,7 +131,7 @@ class Content<S:Sink send copy> {
             // Note: we can parse the next document in parallel
             // with any previous documents.
             let stream = spawn_html_lexer_task(copy url, self.resource_task);
-            let (root, style_port, js_port) = build_dom(self.scope, stream);
+            let (root, style_port, js_port) = build_dom(self.scope, stream, url);
             let css_rules = style_port.recv();
             let js_scripts = js_port.recv();
 

src/servo/parser/html_builder.rs

@@ -153,7 +153,7 @@ fn js_script_listener(to_parent : comm::chan<~[~[u8]]>, from_parent : comm::port
 }
 
 #[warn(no_non_implicitly_copyable_typarams)]
-fn build_dom(scope: NodeScope, stream: comm::port<Token>) -> (Node, comm::port<Stylesheet>, comm::port<~[~[u8]]>) {
+fn build_dom(scope: NodeScope, stream: comm::port<Token>, url: url) -> (Node, comm::port<Stylesheet>, comm::port<~[~[u8]]>) {
     // The current reference node.
     let mut cur_node = scope.new_node(Element(ElementData(~"html", ~HTMLDivElement)));
     // We will spawn a separate task to parse any css that is
@@ -204,8 +204,8 @@ fn build_dom(scope: NodeScope, stream: comm::port<Token>) -> (Node, comm::port<S
                           some(filename) {
                             #debug["Linking to a css sheet named: %s", filename];
                             // FIXME: Need to base the new url on the current url
-                            let url = make_url(filename, none);
+                            let new_url = make_url(filename, some(url));
-                            style_chan.send(File(url));
+                            style_chan.send(File(new_url));
                           }
                           none { /* fall through*/ }
                         }

src/servo/util/url.rs

@@ -21,7 +21,17 @@ fn make_url(str_url: ~str, current_url: option<url>) -> url {
             // and build an absolute path with the cwd
             ~"file://" + path::connect(os::getcwd(), str_url)
         } else {
-            fail;//current_url.get().scheme + "://" + str_url
+            let current_url = current_url.get();
+            #debug("make_url: current_url: %?", current_url);
+            if current_url.path.is_empty() || current_url.path.ends_with("/") {
+                current_url.scheme + "://" + path::connect(current_url.host, str_url)
+            } else {
+                let path = path::split(current_url.path);
+                let path = path.init();
+                let path = path::connect_many(path + ~[str_url]);
+
+                current_url.scheme + "://" + path::connect(current_url.host, path)
+            }
         }
     };
 
@@ -37,3 +47,47 @@ fn should_create_absolute_file_url_if_current_url_is_none_and_str_url_looks_file
     assert url.scheme == ~"file";
     assert url.path.contains(os::getcwd());
 }
+
+#[test]
+fn should_create_url_based_on_old_url_1() {
+    let old_str = ~"http://example.com";
+    let old_url = make_url(old_str, none);
+    let new_str = ~"index.html";
+    let new_url = make_url(new_str, some(old_url));
+    assert new_url.scheme == ~"http";
+    assert new_url.host == ~"example.com";
+    assert new_url.path == ~"/index.html";
+}
+
+#[test]
+fn should_create_url_based_on_old_url_2() {
+    let old_str = ~"http://example.com/";
+    let old_url = make_url(old_str, none);
+    let new_str = ~"index.html";
+    let new_url = make_url(new_str, some(old_url));
+    assert new_url.scheme == ~"http";
+    assert new_url.host == ~"example.com";
+    assert new_url.path == ~"/index.html";
+}
+
+#[test]
+fn should_create_url_based_on_old_url_3() {
+    let old_str = ~"http://example.com/index.html";
+    let old_url = make_url(old_str, none);
+    let new_str = ~"crumpet.html";
+    let new_url = make_url(new_str, some(old_url));
+    assert new_url.scheme == ~"http";
+    assert new_url.host == ~"example.com";
+    assert new_url.path == ~"/crumpet.html";
+}
+
+#[test]
+fn should_create_url_based_on_old_url_4() {
+    let old_str = ~"http://example.com/snarf/index.html";
+    let old_url = make_url(old_str, none);
+    let new_str = ~"crumpet.html";
+    let new_url = make_url(new_str, some(old_url));
+    assert new_url.scheme == ~"http";
+    assert new_url.host == ~"example.com";
+    assert new_url.path == ~"/snarf/crumpet.html";
+}