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/* 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 dom::bindings::codegen::Bindings::FormDataBinding::FormDataMethods;
use dom::bindings::error::{Error, Fallible};
use dom::bindings::js::Root;
use dom::bindings::reflector::DomObject;
use dom::bindings::str::USVString;
use dom::blob::{Blob, BlobImpl};
use dom::formdata::FormData;
use dom::globalscope::GlobalScope;
use dom::promise::Promise;
use js::jsapi::JSContext;
use js::jsapi::JS_ClearPendingException;
use js::jsapi::JS_ParseJSON;
use js::jsapi::Value as JSValue;
use js::jsval::UndefinedValue;
use mime::{Mime, TopLevel, SubLevel};
use std::cell::Ref;
use std::rc::Rc;
use std::str;
use url::form_urlencoded;
#[derive(Clone, Copy, HeapSizeOf, JSTraceable)]
pub enum BodyType {
Blob,
FormData,
Json,
Text
}
pub enum FetchedData {
Text(String),
Json(JSValue),
BlobData(Root<Blob>),
FormData(Root<FormData>),
}
// https://fetch.spec.whatwg.org/#concept-body-consume-body
#[allow(unrooted_must_root)]
pub fn consume_body<T: BodyOperations + DomObject>(object: &T, body_type: BodyType) -> Rc<Promise> {
let promise = Promise::new(&object.global());
// Step 1
if object.get_body_used() || object.is_locked() {
promise.reject_error(Error::Type(
"The response's stream is disturbed or locked".to_string(),
));
return promise;
}
object.set_body_promise(&promise, body_type);
// Steps 2-4
// TODO: Body does not yet have a stream.
consume_body_with_promise(object, body_type, &promise);
promise
}
// https://fetch.spec.whatwg.org/#concept-body-consume-body
#[allow(unrooted_must_root)]
pub fn consume_body_with_promise<T: BodyOperations + DomObject>(object: &T,
body_type: BodyType,
promise: &Promise) {
// Step 5
let body = match object.take_body() {
Some(body) => body,
None => return,
};
let pkg_data_results = run_package_data_algorithm(object,
body,
body_type,
object.get_mime_type());
match pkg_data_results {
Ok(results) => {
match results {
FetchedData::Text(s) => promise.resolve_native(&USVString(s)),
FetchedData::Json(j) => promise.resolve_native(&j),
FetchedData::BlobData(b) => promise.resolve_native(&b),
FetchedData::FormData(f) => promise.resolve_native(&f),
};
},
Err(err) => promise.reject_error(err),
}
}
// https://fetch.spec.whatwg.org/#concept-body-package-data
#[allow(unsafe_code)]
fn run_package_data_algorithm<T: BodyOperations + DomObject>(object: &T,
bytes: Vec<u8>,
body_type: BodyType,
mime_type: Ref<Vec<u8>>)
-> Fallible<FetchedData> {
let global = object.global();
let cx = global.get_cx();
let mime = &*mime_type;
match body_type {
BodyType::Text => run_text_data_algorithm(bytes),
BodyType::Json => run_json_data_algorithm(cx, bytes),
BodyType::Blob => run_blob_data_algorithm(&global, bytes, mime),
BodyType::FormData => run_form_data_algorithm(&global, bytes, mime),
}
}
fn run_text_data_algorithm(bytes: Vec<u8>) -> Fallible<FetchedData> {
Ok(FetchedData::Text(String::from_utf8_lossy(&bytes).into_owned()))
}
#[allow(unsafe_code)]
fn run_json_data_algorithm(cx: *mut JSContext,
bytes: Vec<u8>) -> Fallible<FetchedData> {
let json_text = String::from_utf8_lossy(&bytes);
let json_text: Vec<u16> = json_text.encode_utf16().collect();
rooted!(in(cx) let mut rval = UndefinedValue());
unsafe {
if !JS_ParseJSON(cx,
json_text.as_ptr(),
json_text.len() as u32,
rval.handle_mut()) {
JS_ClearPendingException(cx);
// TODO: See issue #13464. Exception should be thrown instead of cleared.
return Err(Error::Type("Failed to parse JSON".to_string()));
}
Ok(FetchedData::Json(rval.get()))
}
}
fn run_blob_data_algorithm(root: &GlobalScope,
bytes: Vec<u8>,
mime: &[u8]) -> Fallible<FetchedData> {
let mime_string = if let Ok(s) = String::from_utf8(mime.to_vec()) {
s
} else {
"".to_string()
};
let blob = Blob::new(root, BlobImpl::new_from_bytes(bytes), mime_string);
Ok(FetchedData::BlobData(blob))
}
fn run_form_data_algorithm(root: &GlobalScope, bytes: Vec<u8>, mime: &[u8]) -> Fallible<FetchedData> {
let mime_str = if let Ok(s) = str::from_utf8(mime) {
s
} else {
""
};
let mime: Mime = mime_str.parse().map_err(
|_| Error::Type("Inappropriate MIME-type for Body".to_string()))?;
match mime {
// TODO
// ... Parser for Mime(TopLevel::Multipart, SubLevel::FormData, _)
// ... is not fully determined yet.
Mime(TopLevel::Application, SubLevel::WwwFormUrlEncoded, _) => {
let entries = form_urlencoded::parse(&bytes);
let formdata = FormData::new(None, root);
for (k, e) in entries {
formdata.Append(USVString(k.into_owned()), USVString(e.into_owned()));
}
return Ok(FetchedData::FormData(formdata));
},
_ => return Err(Error::Type("Inappropriate MIME-type for Body".to_string())),
}
}
pub trait BodyOperations {
fn get_body_used(&self) -> bool;
fn set_body_promise(&self, p: &Rc<Promise>, body_type: BodyType);
/// Returns `Some(_)` if the body is complete, `None` if there is more to
/// come.
fn take_body(&self) -> Option<Vec<u8>>;
fn is_locked(&self) -> bool;
fn get_mime_type(&self) -> Ref<Vec<u8>>;
}
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