Add form submission for file type input and related fixings

15 files changed, 242 insertions, 112 deletions

diff --git a/components/script/dom/filelist.rs b/components/script/dom/filelist.rs
index 96bfc4ce0d3..4f8e976f5f7 100644
--- a/components/script/dom/filelist.rs
+++ b/components/script/dom/filelist.rs
@@ -9,6 +9,7 @@ use dom::bindings::js::{JS, Root};
 use dom::bindings::reflector::{Reflector, reflect_dom_object};
 use dom::file::File;
 use dom::window::Window;
+use std::slice::Iter;
 
 // https://w3c.github.io/FileAPI/#dfn-filelist
 #[dom_struct]
@@ -32,6 +33,10 @@ impl FileList {
                            GlobalRef::Window(window),
                            FileListBinding::Wrap)
     }
+
+    pub fn iter_files(&self) -> Iter<JS<File>> {
+        self.list.iter()
+    }
 }
 
 impl FileListMethods for FileList {
diff --git a/components/script/dom/htmlformelement.rs b/components/script/dom/htmlformelement.rs
index 9d7ce208ee2..72b8cc19c16 100644
--- a/components/script/dom/htmlformelement.rs
+++ b/components/script/dom/htmlformelement.rs
@@ -37,11 +37,9 @@ use dom::htmlselectelement::HTMLSelectElement;
 use dom::htmltextareaelement::HTMLTextAreaElement;
 use dom::node::{Node, document_from_node, window_from_node};
 use dom::virtualmethods::VirtualMethods;
-use dom::window::Window;
 use encoding::EncodingRef;
 use encoding::all::UTF_8;
 use encoding::label::encoding_from_whatwg_label;
-use encoding::types::DecoderTrap;
 use hyper::header::{Charset, ContentDisposition, ContentType, DispositionParam, DispositionType};
 use hyper::method::Method;
 use msg::constellation_msg::{LoadData, PipelineId};
@@ -54,7 +52,6 @@ use string_cache::Atom;
 use style::attr::AttrValue;
 use style::str::split_html_space_chars;
 use task_source::TaskSource;
-use url::form_urlencoded;
 
 #[derive(JSTraceable, PartialEq, Clone, Copy, HeapSizeOf)]
 pub struct GenerationId(u32);
@@ -280,39 +277,38 @@ impl HTMLFormElement {
 
     // https://html.spec.whatwg.org/multipage/#multipart/form-data-encoding-algorithm
     fn encode_multipart_form_data(&self, form_data: &mut Vec<FormDatum>,
-                                  encoding: Option<EncodingRef>,
-                                  boundary: String) -> String {
+                                  boundary: String, encoding: EncodingRef) -> Vec<u8> {
         // Step 1
-        let mut result = "".to_owned();
+        let mut result = vec![];
 
         // Step 2
-        // (maybe take encoding as input)
-        let encoding = encoding.unwrap_or(self.pick_encoding());
-
-        //  Step 3
         let charset = &*encoding.whatwg_name().unwrap_or("UTF-8");
 
-        // Step 4
+        // Step 3
         for entry in form_data.iter_mut() {
-            // Substep 1
+            // 3.1
             if entry.name == "_charset_" && entry.ty == "hidden" {
                 entry.value = FormDatumValue::String(DOMString::from(charset.clone()));
             }
-            // TODO: Substep 2
+            // TODO: 3.2
 
-            // Step 5
+            // Step 4
             // https://tools.ietf.org/html/rfc7578#section-4
-            result.push_str(&*format!("\r\n--{}\r\n", boundary));
+            // NOTE(izgzhen): The encoding here expected by most servers seems different from
+            // what spec says (that it should start with a '\r\n').
+            let mut boundary_bytes = format!("--{}\r\n", boundary).into_bytes();
+            result.append(&mut boundary_bytes);
             let mut content_disposition = ContentDisposition {
                 disposition: DispositionType::Ext("form-data".to_owned()),
                 parameters: vec![DispositionParam::Ext("name".to_owned(), String::from(entry.name.clone()))]
             };
 
             match entry.value {
-                FormDatumValue::String(ref s) =>
-                    result.push_str(&*format!("Content-Disposition: {}\r\n\r\n{}",
-                        content_disposition,
-                        s)),
+                FormDatumValue::String(ref s) => {
+                    let mut bytes = format!("Content-Disposition: {}\r\n\r\n{}",
+                                            content_disposition, s).into_bytes();
+                    result.append(&mut bytes);
+                }
                 FormDatumValue::File(ref f) => {
                     content_disposition.parameters.push(
                         DispositionParam::Filename(Charset::Ext(String::from(charset.clone())),
@@ -321,20 +317,20 @@ impl HTMLFormElement {
                     // https://tools.ietf.org/html/rfc7578#section-4.4
                     let content_type = ContentType(f.upcast::<Blob>().Type()
                                                     .parse().unwrap_or(mime!(Text / Plain)));
-                    result.push_str(&*format!("Content-Disposition: {}\r\n{}\r\n\r\n",
-                        content_disposition,
-                        content_type));
+                    let mut type_bytes = format!("Content-Disposition: {}\r\n{}\r\n\r\n",
+                                                 content_disposition,
+                                                 content_type).into_bytes();
+                    result.append(&mut type_bytes);
 
-                    let bytes = &f.upcast::<Blob>().get_bytes().unwrap_or(vec![])[..];
+                    let mut bytes = f.upcast::<Blob>().get_bytes().unwrap_or(vec![]);
 
-                    let decoded = encoding.decode(bytes, DecoderTrap::Replace)
-                                          .expect("Invalid encoding in file");
-                    result.push_str(&decoded);
+                    result.append(&mut bytes);
                 }
             }
         }
 
-        result.push_str(&*format!("\r\n--{}--", boundary));
+        let mut boundary_bytes = format!("\r\n--{}--", boundary).into_bytes();
+        result.append(&mut boundary_bytes);
 
         result
     }
@@ -351,18 +347,11 @@ impl HTMLFormElement {
         let charset = &*encoding.whatwg_name().unwrap();
 
         for entry in form_data.iter_mut() {
-            // Step 4
-            if entry.name == "_charset_" && entry.ty == "hidden" {
-                entry.value = FormDatumValue::String(DOMString::from(charset.clone()));
-            }
-
-            // Step 5
-            if entry.ty == "file" {
-                entry.value = FormDatumValue::String(DOMString::from(entry.value_str()));
-            }
+            // Step 4, 5
+            let value = entry.replace_value(charset);
 
             // Step 6
-            result.push_str(&*format!("{}={}\r\n", entry.name, entry.value_str()));
+            result.push_str(&*format!("{}={}\r\n", entry.name, value));
         }
 
         // Step 7
@@ -374,7 +363,7 @@ impl HTMLFormElement {
         // Step 1
         let doc = document_from_node(self);
         let base = doc.url();
-        // TODO: Handle browsing contexts
+        // TODO: Handle browsing contexts (Step 2, 3)
         // Step 4
         if submit_method_flag == SubmittedFrom::NotFromForm &&
            !submitter.no_validate(self)
@@ -397,13 +386,18 @@ impl HTMLFormElement {
         }
         // Step 6
         let mut form_data = self.get_form_dataset(Some(submitter));
+
         // Step 7
-        let mut action = submitter.action();
+        let encoding = self.pick_encoding();
+
         // Step 8
+        let mut action = submitter.action();
+
+        // Step 9
         if action.is_empty() {
             action = DOMString::from(base.as_str());
         }
-        // Step 9-11
+        // Step 10-11
         let action_components = match base.join(&action) {
             Ok(url) => url,
             Err(_) => return
@@ -417,57 +411,87 @@ impl HTMLFormElement {
 
         let mut load_data = LoadData::new(action_components, doc.get_referrer_policy(), Some(doc.url().clone()));
 
-        let parsed_data = match enctype {
+        // Step 18
+        match (&*scheme, method) {
+            (_, FormMethod::FormDialog) => {
+                // TODO: Submit dialog
+                // https://html.spec.whatwg.org/multipage/#submit-dialog
+            }
+            // https://html.spec.whatwg.org/multipage/#submit-mutate-action
+            ("http", FormMethod::FormGet) | ("https", FormMethod::FormGet) | ("data", FormMethod::FormGet) => {
+                load_data.headers.set(ContentType::form_url_encoded());
+                self.mutate_action_url(&mut form_data, load_data, encoding);
+            }
+            // https://html.spec.whatwg.org/multipage/#submit-body
+            ("http", FormMethod::FormPost) | ("https", FormMethod::FormPost) => {
+                load_data.method = Method::Post;
+                self.submit_entity_body(&mut form_data, load_data, enctype, encoding);
+            }
+            // https://html.spec.whatwg.org/multipage/#submit-get-action
+            ("file", _) | ("about", _) | ("data", FormMethod::FormPost) |
+            ("ftp", _) | ("javascript", _) => {
+                self.plan_to_navigate(load_data);
+            }
+            ("mailto", FormMethod::FormPost) => {
+                // TODO: Mail as body
+                // https://html.spec.whatwg.org/multipage/#submit-mailto-body
+            }
+            ("mailto", FormMethod::FormGet) => {
+                // TODO: Mail with headers
+                // https://html.spec.whatwg.org/multipage/#submit-mailto-headers
+            }
+            _ => return,
+        }
+    }
+
+    // https://html.spec.whatwg.org/multipage/#submit-mutate-action
+    fn mutate_action_url(&self, form_data: &mut Vec<FormDatum>, mut load_data: LoadData, encoding: EncodingRef) {
+        let charset = &*encoding.whatwg_name().unwrap();
+
+        load_data.url.query_pairs_mut().clear()
+                 .encoding_override(Some(self.pick_encoding()))
+                 .extend_pairs(form_data.into_iter()
+                                        .map(|field| (field.name.clone(), field.replace_value(charset))));
+
+        self.plan_to_navigate(load_data);
+    }
+
+    // https://html.spec.whatwg.org/multipage/#submit-body
+    fn submit_entity_body(&self, form_data: &mut Vec<FormDatum>, mut load_data: LoadData,
+                          enctype: FormEncType, encoding: EncodingRef) {
+        let boundary = self.generate_boundary();
+        let bytes = match enctype {
             FormEncType::UrlEncoded => {
+                let mut url = load_data.url.clone();
+                let charset = &*encoding.whatwg_name().unwrap();
                 load_data.headers.set(ContentType::form_url_encoded());
 
-                form_urlencoded::Serializer::new(String::new())
-                    .encoding_override(Some(self.pick_encoding()))
-                    .extend_pairs(form_data.into_iter().map(|field| (field.name.clone(), field.value_str())))
-                    .finish()
+                url.query_pairs_mut().clear()
+                   .encoding_override(Some(self.pick_encoding()))
+                   .extend_pairs(form_data.into_iter()
+                                          .map(|field| (field.name.clone(), field.replace_value(charset))));
+
+                url.query().unwrap_or("").to_string().into_bytes()
             }
             FormEncType::FormDataEncoded => {
-                let boundary = self.generate_boundary();
                 let mime = mime!(Multipart / FormData; Boundary =(&boundary));
                 load_data.headers.set(ContentType(mime));
-
-                self.encode_multipart_form_data(&mut form_data, None, boundary)
+                self.encode_multipart_form_data(form_data, boundary, encoding)
             }
             FormEncType::TextPlainEncoded => {
                 load_data.headers.set(ContentType(mime!(Text / Plain)));
-
-                self.encode_plaintext(&mut form_data)
+                self.encode_plaintext(form_data).into_bytes()
             }
         };
 
-        // Step 18
-        let win = window_from_node(self);
-        match (&*scheme, method) {
-            // https://html.spec.whatwg.org/multipage/#submit-dialog
-            (_, FormMethod::FormDialog) => return, // Unimplemented
-            // https://html.spec.whatwg.org/multipage/#submit-mutate-action
-            ("http", FormMethod::FormGet) | ("https", FormMethod::FormGet) => {
-                // FIXME(SimonSapin): use url.query_pairs_mut() here.
-                load_data.url.set_query(Some(&*parsed_data));
-                self.plan_to_navigate(load_data, &win);
-            }
-            // https://html.spec.whatwg.org/multipage/#submit-body
-            ("http", FormMethod::FormPost) | ("https", FormMethod::FormPost) => {
-                load_data.method = Method::Post;
-                load_data.data = Some(parsed_data.into_bytes());
-                self.plan_to_navigate(load_data, &win);
-            }
-            // https://html.spec.whatwg.org/multipage/#submit-get-action
-            ("file", _) | ("about", _) | ("data", FormMethod::FormGet) |
-            ("ftp", _) | ("javascript", _) => {
-                self.plan_to_navigate(load_data, &win);
-            }
-            _ => return // Unimplemented (data and mailto)
-        }
+        load_data.data = Some(bytes);
+        self.plan_to_navigate(load_data);
     }
 
     /// [Planned navigation](https://html.spec.whatwg.org/multipage/#planned-navigation)
-    fn plan_to_navigate(&self, load_data: LoadData, window: &Window) {
+    fn plan_to_navigate(&self, load_data: LoadData) {
+        let window = window_from_node(self);
+
         // Step 1
         // Each planned navigation runnable is tagged with a generation ID, and
         // before the runnable is handled, it first checks whether the HTMLFormElement's
@@ -485,7 +509,7 @@ impl HTMLFormElement {
         };
 
         // Step 3
-        window.dom_manipulation_task_source().queue(nav, GlobalRef::Window(window)).unwrap();
+        window.dom_manipulation_task_source().queue(nav, GlobalRef::Window(&window)).unwrap();
     }
 
     /// Interactively validate the constraints of form elements
@@ -558,10 +582,8 @@ impl HTMLFormElement {
                 match element {
                     HTMLElementTypeId::HTMLInputElement => {
                         let input = child.downcast::<HTMLInputElement>().unwrap();
-                        // Step 3.2-3.7
-                        if let Some(datum) = input.form_datum(submitter) {
-                            data_set.push(datum);
-                        }
+
+                        data_set.append(&mut input.form_datums(submitter));
                     }
                     HTMLElementTypeId::HTMLButtonElement => {
                         let button = child.downcast::<HTMLButtonElement>().unwrap();
@@ -709,10 +731,14 @@ pub struct FormDatum {
 }
 
 impl FormDatum {
-    pub fn value_str(&self) -> String {
+    pub fn replace_value(&self, charset: &str) -> String {
+        if self.name == "_charset_" && self.ty == "hidden" {
+            return charset.to_string();
+        }
+
         match self.value {
+            FormDatumValue::File(ref f) => String::from(f.name().clone()),
             FormDatumValue::String(ref s) => String::from(s.clone()),
-            FormDatumValue::File(ref f) => String::from(f.name().clone())
         }
     }
 }
diff --git a/components/script/dom/htmlinputelement.rs b/components/script/dom/htmlinputelement.rs
index 7f524cac29d..6f7a7a755f5 100644
--- a/components/script/dom/htmlinputelement.rs
+++ b/components/script/dom/htmlinputelement.rs
@@ -648,7 +648,7 @@ impl HTMLInputElement {
 
     /// https://html.spec.whatwg.org/multipage/#constructing-the-form-data-set
     /// Steps range from 3.1 to 3.7 (specific to HTMLInputElement)
-    pub fn form_datum(&self, submitter: Option<FormSubmitter>) -> Option<FormDatum> {
+    pub fn form_datums(&self, submitter: Option<FormSubmitter>) -> Vec<FormDatum> {
         // 3.1: disabled state check is in get_unclean_dataset
 
         // Step 3.2
@@ -664,26 +664,55 @@ impl HTMLInputElement {
 
         match ty {
             // Step 3.1: it's a button but it is not submitter.
-            atom!("submit") | atom!("button") | atom!("reset") if !is_submitter => return None,
+            atom!("submit") | atom!("button") | atom!("reset") if !is_submitter => return vec![],
             // Step 3.1: it's the "Checkbox" or "Radio Button" and whose checkedness is false.
             atom!("radio") | atom!("checkbox") => if !self.Checked() || name.is_empty() {
-                return None;
+                return vec![];
             },
+            atom!("file") => {
+                let mut datums = vec![];
+
+                // Step 3.2-3.7
+                let name = self.Name();
+                let type_ = self.Type();
+
+                match self.GetFiles() {
+                    Some(fl) => {
+                        for f in fl.iter_files() {
+                            datums.push(FormDatum {
+                                ty: type_.clone(),
+                                name: name.clone(),
+                                value: FormDatumValue::File(Root::from_ref(&f)),
+                            });
+                        }
+                    }
+                    None => {
+                        datums.push(FormDatum {
+                            // XXX(izgzhen): Spec says 'application/octet-stream' as the type,
+                            // but this is _type_ of element rather than content right?
+                            ty: type_.clone(),
+                            name: name.clone(),
+                            value: FormDatumValue::String(DOMString::from("")),
+                        })
+                    }
+                }
 
-            atom!("image") | atom!("file") => return None, // Unimplemented
+                return datums;
+            }
+            atom!("image") => return vec![], // Unimplemented
             // Step 3.1: it's not the "Image Button" and doesn't have a name attribute.
             _ => if name.is_empty() {
-                return None;
+                return vec![];
             }
 
         }
 
         // Step 3.9
-        Some(FormDatum {
+        vec![FormDatum {
             ty: DOMString::from(&*ty), // FIXME(ajeffrey): Convert directly from Atoms to DOMStrings
             name: name,
             value: FormDatumValue::String(self.Value())
-        })
+        }]
     }
 
     // https://html.spec.whatwg.org/multipage/#radio-button-group
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 6fd9384d01e..20107d1e105 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -5806,16 +5806,16 @@
             "url": "/_mozilla/css/word_break_a.html"
           }
         ],
-        "mozilla/blob_url_upload.html": [
+        "mozilla/FileAPI/blob_url_upload.html": [
           {
-            "path": "mozilla/blob_url_upload.html",
+            "path": "mozilla/FileAPI/blob_url_upload.html",
             "references": [
               [
-                "/_mozilla/mozilla/blob_url_upload_ref.html",
+                "/_mozilla/mozilla/FileAPI/blob_url_upload_ref.html",
                 "=="
               ]
             ],
-            "url": "/_mozilla/mozilla/blob_url_upload.html"
+            "url": "/_mozilla/mozilla/FileAPI/blob_url_upload.html"
           }
         ],
         "mozilla/canvas/drawimage_html_image_1.html": [
@@ -6234,6 +6234,24 @@
             "url": "/_mozilla/mozilla/Event.html"
           }
         ],
+        "mozilla/FileAPI/blob.html": [
+          {
+            "path": "mozilla/FileAPI/blob.html",
+            "url": "/_mozilla/mozilla/FileAPI/blob.html"
+          }
+        ],
+        "mozilla/FileAPI/file-select.html": [
+          {
+            "path": "mozilla/FileAPI/file-select.html",
+            "url": "/_mozilla/mozilla/FileAPI/file-select.html"
+          }
+        ],
+        "mozilla/FileAPI/file-upload.html": [
+          {
+            "path": "mozilla/FileAPI/file-upload.html",
+            "url": "/_mozilla/mozilla/FileAPI/file-upload.html"
+          }
+        ],
         "mozilla/FocusEvent.html": [
           {
             "path": "mozilla/FocusEvent.html",
@@ -6258,12 +6276,6 @@
             "url": "/_mozilla/mozilla/binding_keyword.html"
           }
         ],
-        "mozilla/blob.html": [
-          {
-            "path": "mozilla/blob.html",
-            "url": "/_mozilla/mozilla/blob.html"
-          }
-        ],
         "mozilla/body_listener.html": [
           {
             "path": "mozilla/body_listener.html",
@@ -6540,12 +6552,6 @@
             "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",
@@ -14936,16 +14942,16 @@
           "url": "/_mozilla/css/word_break_a.html"
         }
       ],
-      "mozilla/blob_url_upload.html": [
+      "mozilla/FileAPI/blob_url_upload.html": [
         {
-          "path": "mozilla/blob_url_upload.html",
+          "path": "mozilla/FileAPI/blob_url_upload.html",
           "references": [
             [
-              "/_mozilla/mozilla/blob_url_upload_ref.html",
+              "/_mozilla/mozilla/FileAPI/blob_url_upload_ref.html",
               "=="
             ]
           ],
-          "url": "/_mozilla/mozilla/blob_url_upload.html"
+          "url": "/_mozilla/mozilla/FileAPI/blob_url_upload.html"
         }
       ],
       "mozilla/canvas/drawimage_html_image_1.html": [
diff --git a/tests/wpt/mozilla/meta/mozilla/blob_url_upload.html.ini b/tests/wpt/mozilla/meta/mozilla/FileAPI/blob_url_upload.html.ini
index 6ad257ede65..6ad257ede65 100644
--- a/tests/wpt/mozilla/meta/mozilla/blob_url_upload.html.ini
+++ b/tests/wpt/mozilla/meta/mozilla/FileAPI/blob_url_upload.html.ini
diff --git a/tests/wpt/mozilla/meta/mozilla/file_upload.html.ini b/tests/wpt/mozilla/meta/mozilla/FileAPI/file-select.html.ini
index 8c9a7d45d7d..b047e230d99 100644
--- a/tests/wpt/mozilla/meta/mozilla/file_upload.html.ini
+++ b/tests/wpt/mozilla/meta/mozilla/FileAPI/file-select.html.ini
@@ -1,3 +1,3 @@
-[file_upload.html]
+[file-select.html]
   type: testharness
   prefs: [dom.testing.htmlinputelement.select_files.enabled:true]
diff --git a/tests/wpt/mozilla/meta/mozilla/FileAPI/file-upload.html.ini b/tests/wpt/mozilla/meta/mozilla/FileAPI/file-upload.html.ini
new file mode 100644
index 00000000000..f3715f47bf9
--- /dev/null
+++ b/tests/wpt/mozilla/meta/mozilla/FileAPI/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/blob.html b/tests/wpt/mozilla/tests/mozilla/FileAPI/blob.html
index 3f932083542..3f932083542 100644
--- a/tests/wpt/mozilla/tests/mozilla/blob.html
+++ b/tests/wpt/mozilla/tests/mozilla/FileAPI/blob.html
diff --git a/tests/wpt/mozilla/tests/mozilla/blob_url_upload.html b/tests/wpt/mozilla/tests/mozilla/FileAPI/blob_url_upload.html
index 17c8e3ad0b4..17c8e3ad0b4 100644
--- a/tests/wpt/mozilla/tests/mozilla/blob_url_upload.html
+++ b/tests/wpt/mozilla/tests/mozilla/FileAPI/blob_url_upload.html
diff --git a/tests/wpt/mozilla/tests/mozilla/blob_url_upload_ref.html b/tests/wpt/mozilla/tests/mozilla/FileAPI/blob_url_upload_ref.html
index 2ae08600b45..6f95c43ac32 100644
--- a/tests/wpt/mozilla/tests/mozilla/blob_url_upload_ref.html
+++ b/tests/wpt/mozilla/tests/mozilla/FileAPI/blob_url_upload_ref.html
@@ -2,6 +2,6 @@
 <meta charset="utf-8">
 <title>Reference: Blob URL with File Upload</title>
 <body>
-    <img src="test.jpg" id="image">
+    <img src="../test.jpg" id="image">
     <input type="file" id="file-input"">
 </body>
diff --git a/tests/wpt/mozilla/tests/mozilla/file_upload.html b/tests/wpt/mozilla/tests/mozilla/FileAPI/file-select.html
index ad911097f6c..06a5f30dd44 100644
--- a/tests/wpt/mozilla/tests/mozilla/file_upload.html
+++ b/tests/wpt/mozilla/tests/mozilla/FileAPI/file-select.html
@@ -1,6 +1,6 @@
 <!doctype html>
 <meta charset="utf-8">
-<title>Test of uploading a file through input element</title>
+<title>Test of selecting a file through input element</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
diff --git a/tests/wpt/mozilla/tests/mozilla/FileAPI/file-upload-frame.html b/tests/wpt/mozilla/tests/mozilla/FileAPI/file-upload-frame.html
new file mode 100644
index 00000000000..13951bb37d0
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/FileAPI/file-upload-frame.html
@@ -0,0 +1,8 @@
+<form id="testform" enctype="multipart/form-data" action="resource/file-submission.py" method="post">
+<input type="file" name="file-input" id="file-input" />
+</form>
+
+<script type="text/javascript">
+    var e = document.getElementById("file-input");
+    e.selectFiles(["./tests/wpt/mozilla/tests/mozilla/FileAPI/resource/upload.txt"]);
+</script>
diff --git a/tests/wpt/mozilla/tests/mozilla/FileAPI/file-upload.html b/tests/wpt/mozilla/tests/mozilla/FileAPI/file-upload.html
new file mode 100644
index 00000000000..bff5fb1ee7a
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/FileAPI/file-upload.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+
+function run_test() {
+  var t = async_test("form submission of uploaded file");
+
+  var testframe = document.getElementById("testframe");
+  var testdocument = testframe.contentWindow.document;
+
+  testframe.onload = function() {
+    t.step(function () {
+      var response = testframe.contentDocument.documentElement.textContent;
+      assert_equals(response, "OK");
+    });
+    t.done();
+  };
+  testdocument.getElementById("testform").submit();
+}
+</script>
+<iframe id=testframe src="file-upload-frame.html" onload="run_test();"></iframe>
diff --git a/tests/wpt/mozilla/tests/mozilla/FileAPI/resource/file-submission.py b/tests/wpt/mozilla/tests/mozilla/FileAPI/resource/file-submission.py
new file mode 100644
index 00000000000..aa278cb4c4d
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/FileAPI/resource/file-submission.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+def fail(msg):
+    return ([("Content-Type", "text/plain")], "FAIL: " + msg)
+
+
+def main(request, response):
+    content_type = request.headers.get('Content-Type').split("; ")
+
+    if len(content_type) != 2:
+        return fail("content type length is incorrect")
+
+    if content_type[0] != 'multipart/form-data':
+        return fail("content type first field is incorrect")
+
+    boundary = content_type[1].strip("boundary=")
+
+    body = "--" + boundary + "\r\nContent-Disposition: form-data; name=\"file-input\"; filename=\"upload.txt\""
+    body += "\r\n" + "text/plain\r\n\r\nHello\r\n--" + boundary + "--"
+
+    if body != request.body:
+        return fail("request body doesn't match: " + body + "+++++++" + request.body)
+
+    return ([("Content-Type", "text/plain")], "OK")
diff --git a/tests/wpt/mozilla/tests/mozilla/FileAPI/resource/upload.txt b/tests/wpt/mozilla/tests/mozilla/FileAPI/resource/upload.txt
new file mode 100644
index 00000000000..5ab2f8a4323
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/FileAPI/resource/upload.txt
@@ -0,0 +1 @@
+Hello
\ No newline at end of file