Auto merge of #12344 - izgzhen:set-file-js, r=Manishearth

Add ability to WPT-test file uploads and fetches, fixes #12322

Using `inputElem.selectFiles(["path1", "path2"])` in JavaScript with pref `dom.htmlinputelement.select_files.enabled` = `true` will simulate the effect of `inputElem.click()`.

See #12322  for more, also related to #12343.

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9 files changed, 168 insertions, 71 deletions

diff --git a/components/net/filemanager_thread.rs b/components/net/filemanager_thread.rs
index 3ff8579e0d2..627dcced0e9 100644
--- a/components/net/filemanager_thread.rs
+++ b/components/net/filemanager_thread.rs
@@ -21,6 +21,7 @@ use std::sync::{Arc, RwLock};
 #[cfg(any(target_os = "macos", target_os = "linux"))]
 use tinyfiledialogs;
 use url::Url;
+use util::prefs::PREFS;
 use util::thread::spawn_named;
 use uuid::Uuid;
 
@@ -128,14 +129,14 @@ impl<UI: 'static + UIProvider> FileManager<UI> {
         loop {
             let store = self.store.clone();
             match self.receiver.recv().unwrap() {
-                FileManagerThreadMsg::SelectFile(filter, sender, origin) => {
+                FileManagerThreadMsg::SelectFile(filter, sender, origin, opt_test_path) => {
                     spawn_named("select file".to_owned(), move || {
-                        store.select_file(filter, sender, origin);
+                        store.select_file(filter, sender, origin, opt_test_path);
                     });
                 }
-                FileManagerThreadMsg::SelectFiles(filter, sender, origin) => {
+                FileManagerThreadMsg::SelectFiles(filter, sender, origin, opt_test_paths) => {
                     spawn_named("select files".to_owned(), move || {
-                        store.select_files(filter, sender, origin);
+                        store.select_files(filter, sender, origin, opt_test_paths);
                     })
                 }
                 FileManagerThreadMsg::ReadFile(sender, id, origin) => {
@@ -309,8 +310,17 @@ impl <UI: 'static + UIProvider> FileManagerStore<UI> {
 
     fn select_file(&self, patterns: Vec<FilterPattern>,
                    sender: IpcSender<FileManagerResult<SelectedFile>>,
-                   origin: FileOrigin) {
-        match self.ui.open_file_dialog("", patterns) {
+                   origin: FileOrigin, opt_test_path: Option<String>) {
+        // Check if the select_files preference is enabled
+        // to ensure process-level security against compromised script;
+        // Then try applying opt_test_path directly for testing convenience
+        let opt_s = if select_files_pref_enabled() {
+            opt_test_path
+        } else {
+            self.ui.open_file_dialog("", patterns)
+        };
+
+        match opt_s {
             Some(s) => {
                 let selected_path = Path::new(&s);
 
@@ -328,8 +338,17 @@ impl <UI: 'static + UIProvider> FileManagerStore<UI> {
 
     fn select_files(&self, patterns: Vec<FilterPattern>,
                     sender: IpcSender<FileManagerResult<Vec<SelectedFile>>>,
-                    origin: FileOrigin) {
-        match self.ui.open_file_dialog_multi("", patterns) {
+                    origin: FileOrigin, opt_test_paths: Option<Vec<String>>) {
+        // Check if the select_files preference is enabled
+        // to ensure process-level security against compromised script;
+        // Then try applying opt_test_paths directly for testing convenience
+        let opt_v = if select_files_pref_enabled() {
+            opt_test_paths
+        } else {
+            self.ui.open_file_dialog_multi("", patterns)
+        };
+
+        match opt_v {
             Some(v) => {
                 let mut selected_paths = vec![];
 
@@ -481,3 +500,9 @@ impl <UI: 'static + UIProvider> FileManagerStore<UI> {
         }
     }
 }
+
+
+fn select_files_pref_enabled() -> bool {
+    PREFS.get("dom.testing.htmlinputelement.select_files.enabled")
+         .as_boolean().unwrap_or(false)
+}
diff --git a/components/net_traits/filemanager_thread.rs b/components/net_traits/filemanager_thread.rs
index 78efc142a80..88f1b147302 100644
--- a/components/net_traits/filemanager_thread.rs
+++ b/components/net_traits/filemanager_thread.rs
@@ -118,10 +118,10 @@ pub struct FilterPattern(pub String);
 #[derive(Deserialize, Serialize)]
 pub enum FileManagerThreadMsg {
     /// Select a single file, return triple (FileID, FileName, lastModified)
-    SelectFile(Vec<FilterPattern>, IpcSender<FileManagerResult<SelectedFile>>, FileOrigin),
+    SelectFile(Vec<FilterPattern>, IpcSender<FileManagerResult<SelectedFile>>, FileOrigin, Option<String>),
 
     /// Select multiple files, return a vector of triples
-    SelectFiles(Vec<FilterPattern>, IpcSender<FileManagerResult<Vec<SelectedFile>>>, FileOrigin),
+    SelectFiles(Vec<FilterPattern>, IpcSender<FileManagerResult<Vec<SelectedFile>>>, FileOrigin, Option<Vec<String>>),
 
     /// Read file, return the bytes
     ReadFile(IpcSender<FileManagerResult<Vec<u8>>>, SelectedFileId, FileOrigin),
diff --git a/components/script/dom/htmlinputelement.rs b/components/script/dom/htmlinputelement.rs
index 0ee2023e44a..d8acc2dbe75 100644
--- a/components/script/dom/htmlinputelement.rs
+++ b/components/script/dom/htmlinputelement.rs
@@ -579,6 +579,16 @@ impl HTMLInputElementMethods for HTMLInputElement {
             EventCancelable::NotCancelable);
         self.upcast::<Node>().dirty(NodeDamage::OtherNodeDamage);
     }
+
+    // Select the files based on filepaths passed in,
+    // enabled by dom.htmlinputelement.select_files.enabled,
+    // used for test purpose.
+    // check-tidy: no specs after this line
+    fn SelectFiles(&self, paths: Vec<DOMString>) {
+        if self.input_type.get() == InputType::InputFile {
+            self.select_files(Some(paths));
+        }
+    }
 }
 
 
@@ -731,6 +741,80 @@ impl HTMLInputElement {
         let el = self.upcast::<Element>();
         el.set_placeholder_shown_state(has_placeholder && !has_value);
     }
+
+    // https://html.spec.whatwg.org/multipage/#file-upload-state-(type=file)
+    // Select files by invoking UI or by passed in argument
+    fn select_files(&self, opt_test_paths: Option<Vec<DOMString>>) {
+        let window = window_from_node(self);
+        let origin = window.get_url().origin().unicode_serialization();
+        let filemanager = window.resource_threads().sender();
+
+        let mut files: Vec<Root<File>> = vec![];
+        let mut error = None;
+
+        let filter = filter_from_accept(&self.Accept());
+        let target = self.upcast::<EventTarget>();
+
+        if self.Multiple() {
+            let opt_test_paths = opt_test_paths.map(|paths| paths.iter().map(|p| p.to_string()).collect());
+
+            let (chan, recv) = ipc::channel().expect("Error initializing channel");
+            let msg = FileManagerThreadMsg::SelectFiles(filter, chan, origin, opt_test_paths);
+            let _ = filemanager.send(msg).unwrap();
+
+            match recv.recv().expect("IpcSender side error") {
+                Ok(selected_files) => {
+                    for selected in selected_files {
+                        files.push(File::new_from_selected(window.r(), selected));
+                    }
+
+                    target.fire_event("input",
+                                      EventBubbles::Bubbles,
+                                      EventCancelable::NotCancelable);
+                    target.fire_event("change",
+                                      EventBubbles::Bubbles,
+                                      EventCancelable::NotCancelable);
+                },
+                Err(err) => error = Some(err),
+            };
+        } else {
+            let opt_test_path = match opt_test_paths {
+                Some(paths) => {
+                    if paths.len() == 0 {
+                        return;
+                    } else {
+                        Some(paths[0].to_string()) // neglect other paths
+                    }
+                }
+                None => None,
+            };
+
+            let (chan, recv) = ipc::channel().expect("Error initializing channel");
+            let msg = FileManagerThreadMsg::SelectFile(filter, chan, origin, opt_test_path);
+            let _ = filemanager.send(msg).unwrap();
+
+            match recv.recv().expect("IpcSender side error") {
+                Ok(selected) => {
+                    files.push(File::new_from_selected(window.r(), selected));
+
+                    target.fire_event("input",
+                                      EventBubbles::Bubbles,
+                                      EventCancelable::NotCancelable);
+                    target.fire_event("change",
+                                      EventBubbles::Bubbles,
+                                      EventCancelable::NotCancelable);
+                },
+                Err(err) => error = Some(err),
+            };
+        }
+
+        if let Some(err) = error {
+            debug!("Input file select error: {:?}", err);
+        } else {
+            let filelist = FileList::new(window.r(), files);
+            self.filelist.set(Some(&filelist));
+        }
+    }
 }
 
 impl VirtualMethods for HTMLInputElement {
@@ -1149,65 +1233,7 @@ impl Activatable for HTMLInputElement {
                                   EventBubbles::Bubbles,
                                   EventCancelable::NotCancelable);
             },
-            InputType::InputFile => {
-                // https://html.spec.whatwg.org/multipage/#file-upload-state-(type=file)
-                let window = window_from_node(self);
-                let origin = window.get_url().origin().unicode_serialization();
-                let filemanager = window.resource_threads().sender();
-
-                let mut files: Vec<Root<File>> = vec![];
-                let mut error = None;
-
-                let filter = filter_from_accept(&self.Accept());
-                let target = self.upcast::<EventTarget>();
-
-                if self.Multiple() {
-                    let (chan, recv) = ipc::channel().expect("Error initializing channel");
-                    let msg = FileManagerThreadMsg::SelectFiles(filter, chan, origin);
-                    let _ = filemanager.send(msg).unwrap();
-
-                    match recv.recv().expect("IpcSender side error") {
-                        Ok(selected_files) => {
-                            for selected in selected_files {
-                                files.push(File::new_from_selected(window.r(), selected));
-                            }
-
-                            target.fire_event("input",
-                                              EventBubbles::Bubbles,
-                                              EventCancelable::NotCancelable);
-                            target.fire_event("change",
-                                              EventBubbles::Bubbles,
-                                              EventCancelable::NotCancelable);
-                        },
-                        Err(err) => error = Some(err),
-                    };
-                } else {
-                    let (chan, recv) = ipc::channel().expect("Error initializing channel");
-                    let msg = FileManagerThreadMsg::SelectFile(filter, chan, origin);
-                    let _ = filemanager.send(msg).unwrap();
-
-                    match recv.recv().expect("IpcSender side error") {
-                        Ok(selected) => {
-                            files.push(File::new_from_selected(window.r(), selected));
-
-                            target.fire_event("input",
-                                              EventBubbles::Bubbles,
-                                              EventCancelable::NotCancelable);
-                            target.fire_event("change",
-                                              EventBubbles::Bubbles,
-                                              EventCancelable::NotCancelable);
-                        },
-                        Err(err) => error = Some(err),
-                    };
-                }
-
-                if let Some(err) = error {
-                    debug!("Input file select error: {:?}", err);
-                } else {
-                    let filelist = FileList::new(window.r(), files);
-                    self.filelist.set(Some(&filelist));
-                }
-            }
+            InputType::InputFile => self.select_files(None),
             _ => ()
         }
     }
diff --git a/components/script/dom/webidls/HTMLInputElement.webidl b/components/script/dom/webidls/HTMLInputElement.webidl
index d145e498659..1d6160b14cd 100644
--- a/components/script/dom/webidls/HTMLInputElement.webidl
+++ b/components/script/dom/webidls/HTMLInputElement.webidl
@@ -70,6 +70,11 @@ interface HTMLInputElement : HTMLElement {
   void setSelectionRange(unsigned long start, unsigned long end, optional DOMString direction);
 
   // also has obsolete members
+
+  // Select with file-system paths for testing purpose
+  [Pref="dom.testing.htmlinputelement.select_files.enabled"]
+  void selectFiles(sequence<DOMString> path);
+
 };
 
 // https://html.spec.whatwg.org/multipage/#HTMLInputElement-partial
diff --git a/tests/unit/net/filemanager_thread.rs b/tests/unit/net/filemanager_thread.rs
index 27ff56d6a1e..036fdc969c7 100644
--- a/tests/unit/net/filemanager_thread.rs
+++ b/tests/unit/net/filemanager_thread.rs
@@ -40,7 +40,7 @@ fn test_filemanager() {
     {
         // Try to select a dummy file "tests/unit/net/test.txt"
         let (tx, rx) = ipc::channel().unwrap();
-        chan.send(FileManagerThreadMsg::SelectFile(patterns.clone(), tx, origin.clone())).unwrap();
+        chan.send(FileManagerThreadMsg::SelectFile(patterns.clone(), tx, origin.clone(), None)).unwrap();
         let selected = rx.recv().expect("Broken channel")
                                 .expect("The file manager failed to find test.txt");
 
@@ -88,7 +88,7 @@ fn test_filemanager() {
 
     {
         let (tx, rx) = ipc::channel().unwrap();
-        let _ = chan.send(FileManagerThreadMsg::SelectFile(patterns.clone(), tx, origin.clone()));
+        let _ = chan.send(FileManagerThreadMsg::SelectFile(patterns.clone(), tx, origin.clone(), None));
 
         assert!(rx.try_recv().is_err(), "The thread should not respond normally after exited");
     }
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index b8611469cee..94676a48fdc 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -6456,6 +6456,12 @@
             "url": "/_mozilla/mozilla/event_listener.html"
           }
         ],
+        "mozilla/file_upload.html": [
+          {
+            "path": "mozilla/file_upload.html",
+            "url": "/_mozilla/mozilla/file_upload.html"
+          }
+        ],
         "mozilla/focus_blur.html": [
           {
             "path": "mozilla/focus_blur.html",
diff --git a/tests/wpt/mozilla/meta/mozilla/file_upload.html.ini b/tests/wpt/mozilla/meta/mozilla/file_upload.html.ini
new file mode 100644
index 00000000000..8c9a7d45d7d
--- /dev/null
+++ b/tests/wpt/mozilla/meta/mozilla/file_upload.html.ini
@@ -0,0 +1,3 @@
+[file_upload.html]
+  type: testharness
+  prefs: [dom.testing.htmlinputelement.select_files.enabled:true]
diff --git a/tests/wpt/mozilla/tests/mozilla/file_upload.html b/tests/wpt/mozilla/tests/mozilla/file_upload.html
new file mode 100644
index 00000000000..ad911097f6c
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/file_upload.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Test of uploading a file through input element</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body><input id="file-input" type="file"></body>
+
+<script>
+
+async_test(function() {
+  var e = document.getElementById("file-input");
+
+  assert_true(e.selectFiles != undefined, "selectFiles is not defined")
+
+  e.selectFiles(["./tests/wpt/mozilla/tests/mozilla/test.txt"]);
+
+  assert_true(e.files.length > 0, "test.txt is not selected");
+
+  var reader = new FileReader;
+
+  reader.onloadend = this.step_func(function(evt) {
+    assert_equals(evt.target.result, "hello, servo\n");
+
+    this.done();
+  });
+
+  reader.readAsText(e.files[0]);
+
+}, "Select a file");
+</script>
diff --git a/tests/wpt/mozilla/tests/mozilla/test.txt b/tests/wpt/mozilla/tests/mozilla/test.txt
new file mode 100644
index 00000000000..9235007d960
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/test.txt
@@ -0,0 +1 @@
+hello, servo