Merge pull request #2962 from Manishearth/fetch

Start of fetch module; r=jdm

3 files changed, 222 insertions, 0 deletions

diff --git a/src/components/net/fetch/request.rs b/src/components/net/fetch/request.rs
new file mode 100644
index 00000000000..2de606a1a31
--- /dev/null
+++ b/src/components/net/fetch/request.rs
@@ -0,0 +1,108 @@
+/* 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/. */
+
+use url::Url;
+use http::method::{Get, Method};
+use http::headers::request::HeaderCollection;
+
+/// A [request context](http://fetch.spec.whatwg.org/#concept-request-context)
+pub enum Context {
+    Audio, Beacon, CSPreport, Download, Embed, Eventsource,
+    Favicon, Fetch, Font, Form, Frame, Hyperlink, IFrame, Image,
+    ImageSet, Import, Internal, Location, Manifest, Object, Ping,
+    Plugin, Prefetch, Script, ServiceWorker, SharedWorker, Subresource,
+    Style, Track, Video, Worker, XMLHttpRequest, XSLT
+}
+
+/// A [request context frame type](http://fetch.spec.whatwg.org/#concept-request-context-frame-type)
+pub enum ContextFrameType {
+    Auxiliary,
+    TopLevel,
+    Nested,
+    ContextNone
+}
+
+/// A [referer](http://fetch.spec.whatwg.org/#concept-request-referrer)
+pub enum Referer {
+    RefererNone,
+    Client,
+    RefererUrl(Url)
+}
+
+/// A [request mode](http://fetch.spec.whatwg.org/#concept-request-mode)
+pub enum RequestMode {
+    SameOrigin,
+    NoCORS,
+    CORSMode,
+    ForcedPreflightMode
+}
+
+/// Request [credentials mode](http://fetch.spec.whatwg.org/#concept-request-credentials-mode)
+pub enum CredentialsMode {
+    Omit,
+    CredentialsSameOrigin,
+    Include
+}
+
+/// [Response tainting](http://fetch.spec.whatwg.org/#concept-request-response-tainting)
+pub enum ResponseTainting {
+    Basic,
+    CORSTainting,
+    Opaque
+}
+
+/// A [Request](http://fetch.spec.whatwg.org/#requests) as defined by the Fetch spec
+pub struct Request {
+    pub method: Method,
+    pub url: Url,
+    pub headers: HeaderCollection,
+    pub unsafe_request: bool,
+    pub body: Option<Vec<u8>>,
+    pub preserve_content_codings: bool,
+    // pub client: GlobalRef, // XXXManishearth copy over only the relevant fields of the global scope,
+                              // not the entire scope to avoid the libscript dependency
+    pub skip_service_worker: bool,
+    pub context: Context,
+    pub context_frame_type: ContextFrameType,
+    pub origin: Option<Url>,
+    pub force_origin_header: bool,
+    pub same_origin_data: bool,
+    pub referer: Referer,
+    pub authentication: bool,
+    pub sync: bool,
+    pub mode: RequestMode,
+    pub credentials_mode: CredentialsMode,
+    pub use_url_credentials: bool,
+    pub manual_redirect: bool,
+    pub redirect_count: uint,
+    pub response_tainting: ResponseTainting
+}
+
+impl Request {
+    pub fn new(url: Url, context: Context) -> Request {
+         Request {
+            method: Get,
+            url: url,
+            headers: HeaderCollection::new(),
+            unsafe_request: false,
+            body: None,
+            preserve_content_codings: false,
+            skip_service_worker: false,
+            context: context,
+            context_frame_type: ContextNone,
+            origin: None,
+            force_origin_header: false,
+            same_origin_data: false,
+            referer: Client,
+            authentication: false,
+            sync: false,
+            mode: NoCORS,
+            credentials_mode: Omit,
+            use_url_credentials: false,
+            manual_redirect: false,
+            redirect_count: 0,
+            response_tainting: Basic
+        }
+    }
+}
diff --git a/src/components/net/fetch/response.rs b/src/components/net/fetch/response.rs
new file mode 100644
index 00000000000..ee98f388f7b
--- /dev/null
+++ b/src/components/net/fetch/response.rs
@@ -0,0 +1,108 @@
+/* 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/. */
+
+use url::Url;
+use http::status::{Status, UnregisteredStatus};
+use StatusOk = http::status::Ok;
+use http::headers::HeaderEnum;
+use http::headers::response::HeaderCollection;
+use std::ascii::OwnedStrAsciiExt;
+
+// [Response type](http://fetch.spec.whatwg.org/#concept-response-type)
+#[deriving(Clone, PartialEq)]
+pub enum ResponseType {
+    Basic,
+    CORS,
+    Default,
+    Error,
+    Opaque
+}
+
+// [Response termination reason](http://fetch.spec.whatwg.org/#concept-response-termination-reason)
+#[deriving(Clone)]
+pub enum TerminationReason {
+    EndUserAbort,
+    Fatal,
+    Timeout
+}
+
+// A [Response](http://fetch.spec.whatwg.org/#concept-response) as defined by the Fetch spec
+#[deriving(Clone)]
+pub struct Response {
+    pub response_type: ResponseType,
+    pub termination_reason: Option<TerminationReason>,
+    pub url: Option<Url>,
+    pub status: Status,
+    pub headers: HeaderCollection,
+    pub body: Option<Vec<u8>>,
+    /// [Internal response](http://fetch.spec.whatwg.org/#concept-internal-response), only used if the Response is a filtered response
+    pub internal_response: Option<Box<Response>>,
+}
+
+impl Response {
+    pub fn new() -> Response {
+        Response {
+            response_type: Default,
+            termination_reason: None,
+            url: None,
+            status: StatusOk,
+            headers: HeaderCollection::new(),
+            body: None,
+            internal_response: None
+        }
+    }
+
+    pub fn is_network_error(&self) -> bool {
+        match self.response_type {
+            Error => true,
+            _ => false
+        }
+    }
+
+    /// Convert to a filtered response, of type `filter_type`.
+    /// Do not use with type Error or Default
+    pub fn to_filtered(self, filter_type: ResponseType) -> Response {
+        assert!(filter_type != Error);
+        assert!(filter_type != Default);
+        if self.is_network_error() {
+            return self;
+        }
+        let old_headers = self.headers.clone();
+        let mut response = self.clone();
+        response.internal_response = Some(box self);
+        match filter_type {
+            Default | Error => unreachable!(),
+            Basic => {
+                let mut headers = HeaderCollection::new();
+                for h in old_headers.iter() {
+                    match h.header_name().into_ascii_lower().as_slice() {
+                        "set-cookie" | "set-cookie2" => {},
+                        _ => headers.insert(h)
+                    }
+                }
+                response.headers = headers;
+                response.response_type = filter_type;
+            },
+            CORS => {
+                let mut headers = HeaderCollection::new();
+                for h in old_headers.iter() {
+                    match h.header_name().into_ascii_lower().as_slice() {
+                        "cache-control" | "content-language" |
+                        "content-type" | "expires" | "last-modified" | "Pragma" => {},
+                        // XXXManishearth handle Access-Control-Expose-Headers
+                        _ => headers.insert(h)
+                    }
+                }
+                response.headers = headers;
+                response.response_type = filter_type;
+            },
+            Opaque => {
+                response.headers = HeaderCollection::new();
+                response.status = UnregisteredStatus(0, "".to_string());
+                response.body = None;
+            }
+        }
+        response
+    }
+}
diff --git a/src/components/net/net.rs b/src/components/net/net.rs
index 454c8295c95..497215e4ba2 100644
--- a/src/components/net/net.rs
+++ b/src/components/net/net.rs
@@ -37,3 +37,9 @@ pub mod image_cache_task;
 pub mod local_image_cache;
 pub mod resource_task;
 
+/// An implementation of the [Fetch spec](http://fetch.spec.whatwg.org/)
+pub mod fetch {
+    #![allow(dead_code)] // XXXManishearth this is only temporary until the Fetch mod starts being used
+    pub mod request;
+    pub mod response;
+}