From 8cd572de958864f5ec964d676ffd06757722b800 Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Sat, 23 Aug 2014 12:13:59 +0530
Subject: [PATCH] Add basic_fetch and a skeleton http_fetch

---
 src/components/net/fetch/request.rs  | 38 ++++++++++++++++++++++
 src/components/net/fetch/response.rs | 48 ++++++++++++++++++++++++----
 2 files changed, 80 insertions(+), 6 deletions(-)

diff --git a/src/components/net/fetch/request.rs b/src/components/net/fetch/request.rs
index 2de606a1a31..2dfd5572a97 100644
--- a/src/components/net/fetch/request.rs
+++ b/src/components/net/fetch/request.rs
@@ -5,6 +5,7 @@
 use url::Url;
 use http::method::{Get, Method};
 use http::headers::request::HeaderCollection;
+use fetch::response::Response;
 
 /// A [request context](http://fetch.spec.whatwg.org/#concept-request-context)
 pub enum Context {
@@ -105,4 +106,41 @@ impl Request {
             response_tainting: Basic
         }
     }
+
+    /// [Basic fetch](http://fetch.spec.whatwg.org#basic-fetch)
+    /// 
+    pub fn basic_fetch(&mut self) -> Response {
+        match self.url.scheme.as_slice() {
+            "about" => match self.url.non_relative_scheme_data() {
+                Some(s) if s.as_slice() == "blank" => {
+                    let mut response = Response::new();
+                    let _ = response.headers.insert_raw("Content-Type".to_string(), b"text/html;charset=utf-8");
+                    response
+                },
+                _ => Response::network_error()
+            },
+            "http" | "https" => {
+                self.http_fetch(false, false, false)
+            },
+            "blob" | "data" | "file" | "ftp" => {
+                // XXXManishearth handle these
+                fail!("Unimplemented scheme for Fetch")
+            },
+
+            _ => Response::network_error()
+        }
+    }
+    // [Basic fetch](http://fetch.spec.whatwg.org#http-fetch)
+    pub fn http_fetch(&mut self, _cors_flag: bool, cors_preflight_flag: bool, _authentication_fetch_flag: bool) -> Response {
+        let response = Response::new();
+        // TODO: Service worker fetch
+        // Step 3
+        // Substep 1
+        self.skip_service_worker = true;
+        // Substep 2
+        if cors_preflight_flag {
+            // XXXManishearth stuff goes here
+        }
+        response
+    }
 }
diff --git a/src/components/net/fetch/response.rs b/src/components/net/fetch/response.rs
index ee98f388f7b..359ec6aa394 100644
--- a/src/components/net/fetch/response.rs
+++ b/src/components/net/fetch/response.rs
@@ -8,8 +8,9 @@ use StatusOk = http::status::Ok;
 use http::headers::HeaderEnum;
 use http::headers::response::HeaderCollection;
 use std::ascii::OwnedStrAsciiExt;
+use std::comm::Receiver;
 
-// [Response type](http://fetch.spec.whatwg.org/#concept-response-type)
+/// [Response type](http://fetch.spec.whatwg.org/#concept-response-type)
 #[deriving(Clone, PartialEq)]
 pub enum ResponseType {
     Basic,
@@ -19,7 +20,7 @@ pub enum ResponseType {
     Opaque
 }
 
-// [Response termination reason](http://fetch.spec.whatwg.org/#concept-response-termination-reason)
+/// [Response termination reason](http://fetch.spec.whatwg.org/#concept-response-termination-reason)
 #[deriving(Clone)]
 pub enum TerminationReason {
     EndUserAbort,
@@ -27,7 +28,30 @@ pub enum TerminationReason {
     Timeout
 }
 
-// A [Response](http://fetch.spec.whatwg.org/#concept-response) as defined by the Fetch spec
+/// The response body can still be pushed to after fetch
+/// This provides a way to store unfinished response bodies
+#[unstable = "I haven't yet decided exactly how the interface for this will be"]
+#[deriving(Clone)]
+pub enum ResponseBody {
+    Empty, // XXXManishearth is this necessary, or is Done(vec![]) enough?
+    Receiving(Vec<u8>),
+    Done(Vec<u8>),
+}
+
+#[unstable = "I haven't yet decided exactly how the interface for this will be"]
+pub enum ResponseMsg {
+    Chunk(Vec<u8>),
+    Finished,
+    Errored
+}
+
+#[unstable = "I haven't yet decided exactly how the interface for this will be"]
+pub struct ResponseLoader {
+    response: Response,
+    chan: Receiver<ResponseMsg>
+}
+
+/// A [Response](http://fetch.spec.whatwg.org/#concept-response) as defined by the Fetch spec
 #[deriving(Clone)]
 pub struct Response {
     pub response_type: ResponseType,
@@ -35,7 +59,7 @@ pub struct Response {
     pub url: Option<Url>,
     pub status: Status,
     pub headers: HeaderCollection,
-    pub body: Option<Vec<u8>>,
+    pub body: ResponseBody,
     /// [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>>,
 }
@@ -48,7 +72,19 @@ impl Response {
             url: None,
             status: StatusOk,
             headers: HeaderCollection::new(),
-            body: None,
+            body: Empty,
+            internal_response: None
+        }
+    }
+
+    pub fn network_error() -> Response {
+        Response {
+            response_type: Error,
+            termination_reason: None,
+            url: None,
+            status: UnregisteredStatus(0, "".to_string()),
+            headers: HeaderCollection::new(),
+            body: Empty,
             internal_response: None
         }
     }
@@ -100,7 +136,7 @@ impl Response {
             Opaque => {
                 response.headers = HeaderCollection::new();
                 response.status = UnregisteredStatus(0, "".to_string());
-                response.body = None;
+                response.body = Empty;
             }
         }
         response