mirror of
https://github.com/denoland/deno.git
synced 2024-12-22 07:14:47 -05:00
546 lines
16 KiB
JavaScript
546 lines
16 KiB
JavaScript
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
|
|
|
|
// @ts-check
|
|
/// <reference path="../../core/lib.deno_core.d.ts" />
|
|
/// <reference path="../web/internal.d.ts" />
|
|
/// <reference path="../url/internal.d.ts" />
|
|
/// <reference path="../web/lib.deno_web.d.ts" />
|
|
/// <reference path="../web/06_streams_types.d.ts" />
|
|
/// <reference path="./internal.d.ts" />
|
|
/// <reference path="./lib.deno_fetch.d.ts" />
|
|
/// <reference lib="esnext" />
|
|
"use strict";
|
|
|
|
((window) => {
|
|
const core = window.Deno.core;
|
|
const webidl = window.__bootstrap.webidl;
|
|
const { byteLowerCase } = window.__bootstrap.infra;
|
|
const { errorReadableStream } = window.__bootstrap.streams;
|
|
const { InnerBody, extractBody } = window.__bootstrap.fetchBody;
|
|
const {
|
|
toInnerRequest,
|
|
toInnerResponse,
|
|
fromInnerResponse,
|
|
redirectStatus,
|
|
nullBodyStatus,
|
|
networkError,
|
|
abortedNetworkError,
|
|
} = window.__bootstrap.fetch;
|
|
const abortSignal = window.__bootstrap.abortSignal;
|
|
const {
|
|
ArrayPrototypePush,
|
|
ArrayPrototypeSplice,
|
|
ArrayPrototypeFilter,
|
|
ArrayPrototypeIncludes,
|
|
Promise,
|
|
PromisePrototypeThen,
|
|
PromisePrototypeCatch,
|
|
String,
|
|
StringPrototypeStartsWith,
|
|
StringPrototypeToLowerCase,
|
|
TypedArrayPrototypeSubarray,
|
|
TypeError,
|
|
Uint8Array,
|
|
WeakMap,
|
|
WeakMapPrototypeDelete,
|
|
WeakMapPrototypeGet,
|
|
WeakMapPrototypeHas,
|
|
WeakMapPrototypeSet,
|
|
} = window.__bootstrap.primordials;
|
|
|
|
const REQUEST_BODY_HEADER_NAMES = [
|
|
"content-encoding",
|
|
"content-language",
|
|
"content-location",
|
|
"content-type",
|
|
];
|
|
|
|
const requestBodyReaders = new WeakMap();
|
|
|
|
/**
|
|
* @param {{ method: string, url: string, headers: [string, string][], clientRid: number | null, hasBody: boolean }} args
|
|
* @param {Uint8Array | null} body
|
|
* @returns {{ requestRid: number, requestBodyRid: number | null }}
|
|
*/
|
|
function opFetch(args, body) {
|
|
return core.opSync("op_fetch", args, body);
|
|
}
|
|
|
|
/**
|
|
* @param {number} rid
|
|
* @returns {Promise<{ status: number, statusText: string, headers: [string, string][], url: string, responseRid: number }>}
|
|
*/
|
|
function opFetchSend(rid) {
|
|
return core.opAsync("op_fetch_send", rid);
|
|
}
|
|
|
|
// A finalization registry to clean up underlying fetch resources that are GC'ed.
|
|
const RESOURCE_REGISTRY = new FinalizationRegistry((rid) => {
|
|
core.tryClose(rid);
|
|
});
|
|
|
|
/**
|
|
* @param {number} responseBodyRid
|
|
* @param {AbortSignal} [terminator]
|
|
* @returns {ReadableStream<Uint8Array>}
|
|
*/
|
|
function createResponseBodyStream(responseBodyRid, terminator) {
|
|
function onAbort() {
|
|
if (readable) {
|
|
errorReadableStream(readable, terminator.reason);
|
|
}
|
|
core.tryClose(responseBodyRid);
|
|
}
|
|
// TODO(lucacasonato): clean up registration
|
|
terminator[abortSignal.add](onAbort);
|
|
const readable = new ReadableStream({
|
|
type: "bytes",
|
|
async pull(controller) {
|
|
try {
|
|
// This is the largest possible size for a single packet on a TLS
|
|
// stream.
|
|
const chunk = new Uint8Array(16 * 1024 + 256);
|
|
// TODO(@AaronO): switch to handle nulls if that's moved to core
|
|
const read = await core.read(
|
|
responseBodyRid,
|
|
chunk,
|
|
);
|
|
if (read > 0) {
|
|
// We read some data. Enqueue it onto the stream.
|
|
controller.enqueue(TypedArrayPrototypeSubarray(chunk, 0, read));
|
|
} else {
|
|
RESOURCE_REGISTRY.unregister(readable);
|
|
// We have reached the end of the body, so we close the stream.
|
|
controller.close();
|
|
core.tryClose(responseBodyRid);
|
|
}
|
|
} catch (err) {
|
|
RESOURCE_REGISTRY.unregister(readable);
|
|
if (terminator.aborted) {
|
|
controller.error(terminator.reason);
|
|
} else {
|
|
// There was an error while reading a chunk of the body, so we
|
|
// error.
|
|
controller.error(err);
|
|
}
|
|
core.tryClose(responseBodyRid);
|
|
}
|
|
},
|
|
cancel() {
|
|
if (!terminator.aborted) {
|
|
terminator[abortSignal.signalAbort]();
|
|
}
|
|
},
|
|
});
|
|
RESOURCE_REGISTRY.register(readable, responseBodyRid, readable);
|
|
return readable;
|
|
}
|
|
|
|
/**
|
|
* @param {InnerRequest} req
|
|
* @param {boolean} recursive
|
|
* @param {AbortSignal} terminator
|
|
* @returns {Promise<InnerResponse>}
|
|
*/
|
|
async function mainFetch(req, recursive, terminator) {
|
|
if (req.blobUrlEntry !== null) {
|
|
if (req.method !== "GET") {
|
|
throw new TypeError("Blob URL fetch only supports GET method.");
|
|
}
|
|
|
|
const body = new InnerBody(req.blobUrlEntry.stream());
|
|
terminator[abortSignal.add](() => body.error(terminator.reason));
|
|
|
|
return {
|
|
headerList: [
|
|
["content-length", String(req.blobUrlEntry.size)],
|
|
["content-type", req.blobUrlEntry.type],
|
|
],
|
|
status: 200,
|
|
statusMessage: "OK",
|
|
body,
|
|
type: "basic",
|
|
url() {
|
|
if (this.urlList.length == 0) return null;
|
|
return this.urlList[this.urlList.length - 1];
|
|
},
|
|
urlList: recursive ? [] : [...req.urlList],
|
|
};
|
|
}
|
|
|
|
/** @type {ReadableStream<Uint8Array> | Uint8Array | null} */
|
|
let reqBody = null;
|
|
|
|
if (req.body !== null) {
|
|
if (req.body.streamOrStatic instanceof ReadableStream) {
|
|
if (req.body.length === null || req.body.source instanceof Blob) {
|
|
reqBody = req.body.stream;
|
|
} else {
|
|
const reader = req.body.stream.getReader();
|
|
WeakMapPrototypeSet(requestBodyReaders, req, reader);
|
|
const r1 = await reader.read();
|
|
if (r1.done) {
|
|
reqBody = new Uint8Array(0);
|
|
} else {
|
|
reqBody = r1.value;
|
|
const r2 = await reader.read();
|
|
if (!r2.done) throw new TypeError("Unreachable");
|
|
}
|
|
WeakMapPrototypeDelete(requestBodyReaders, req);
|
|
}
|
|
} else {
|
|
req.body.streamOrStatic.consumed = true;
|
|
reqBody = req.body.streamOrStatic.body;
|
|
// TODO(@AaronO): plumb support for StringOrBuffer all the way
|
|
reqBody = typeof reqBody === "string" ? core.encode(reqBody) : reqBody;
|
|
}
|
|
}
|
|
|
|
const { requestRid, requestBodyRid, cancelHandleRid } = opFetch({
|
|
method: req.method,
|
|
url: req.currentUrl(),
|
|
headers: req.headerList,
|
|
clientRid: req.clientRid,
|
|
hasBody: reqBody !== null,
|
|
bodyLength: req.body?.length,
|
|
}, reqBody instanceof Uint8Array ? reqBody : null);
|
|
|
|
function onAbort() {
|
|
if (cancelHandleRid !== null) {
|
|
core.tryClose(cancelHandleRid);
|
|
}
|
|
if (requestBodyRid !== null) {
|
|
core.tryClose(requestBodyRid);
|
|
}
|
|
}
|
|
terminator[abortSignal.add](onAbort);
|
|
|
|
if (requestBodyRid !== null) {
|
|
if (reqBody === null || !(reqBody instanceof ReadableStream)) {
|
|
throw new TypeError("Unreachable");
|
|
}
|
|
const reader = reqBody.getReader();
|
|
WeakMapPrototypeSet(requestBodyReaders, req, reader);
|
|
(async () => {
|
|
while (true) {
|
|
const { value, done } = await PromisePrototypeCatch(
|
|
reader.read(),
|
|
(err) => {
|
|
if (terminator.aborted) return { done: true, value: undefined };
|
|
throw err;
|
|
},
|
|
);
|
|
if (done) break;
|
|
if (!(value instanceof Uint8Array)) {
|
|
await reader.cancel("value not a Uint8Array");
|
|
break;
|
|
}
|
|
try {
|
|
await PromisePrototypeCatch(
|
|
core.write(requestBodyRid, value),
|
|
(err) => {
|
|
if (terminator.aborted) return;
|
|
throw err;
|
|
},
|
|
);
|
|
if (terminator.aborted) break;
|
|
} catch (err) {
|
|
await reader.cancel(err);
|
|
break;
|
|
}
|
|
}
|
|
WeakMapPrototypeDelete(requestBodyReaders, req);
|
|
core.tryClose(requestBodyRid);
|
|
})();
|
|
}
|
|
|
|
let resp;
|
|
try {
|
|
resp = await PromisePrototypeCatch(opFetchSend(requestRid), (err) => {
|
|
if (terminator.aborted) return;
|
|
throw err;
|
|
});
|
|
} finally {
|
|
if (cancelHandleRid !== null) {
|
|
core.tryClose(cancelHandleRid);
|
|
}
|
|
}
|
|
if (terminator.aborted) return abortedNetworkError();
|
|
|
|
/** @type {InnerResponse} */
|
|
const response = {
|
|
headerList: resp.headers,
|
|
status: resp.status,
|
|
body: null,
|
|
statusMessage: resp.statusText,
|
|
type: "basic",
|
|
url() {
|
|
if (this.urlList.length == 0) return null;
|
|
return this.urlList[this.urlList.length - 1];
|
|
},
|
|
urlList: req.urlList,
|
|
};
|
|
if (redirectStatus(resp.status)) {
|
|
switch (req.redirectMode) {
|
|
case "error":
|
|
core.close(resp.responseRid);
|
|
return networkError(
|
|
"Encountered redirect while redirect mode is set to 'error'",
|
|
);
|
|
case "follow":
|
|
core.close(resp.responseRid);
|
|
return httpRedirectFetch(req, response, terminator);
|
|
case "manual":
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (nullBodyStatus(response.status)) {
|
|
core.close(resp.responseRid);
|
|
} else {
|
|
if (req.method === "HEAD" || req.method === "CONNECT") {
|
|
response.body = null;
|
|
core.close(resp.responseRid);
|
|
} else {
|
|
response.body = new InnerBody(
|
|
createResponseBodyStream(resp.responseRid, terminator),
|
|
);
|
|
}
|
|
}
|
|
|
|
if (recursive) return response;
|
|
|
|
if (response.urlList.length === 0) {
|
|
response.urlList = [...req.urlList];
|
|
}
|
|
|
|
return response;
|
|
}
|
|
|
|
/**
|
|
* @param {InnerRequest} request
|
|
* @param {InnerResponse} response
|
|
* @param {AbortSignal} terminator
|
|
* @returns {Promise<InnerResponse>}
|
|
*/
|
|
function httpRedirectFetch(request, response, terminator) {
|
|
const locationHeaders = ArrayPrototypeFilter(
|
|
response.headerList,
|
|
(entry) => byteLowerCase(entry[0]) === "location",
|
|
);
|
|
if (locationHeaders.length === 0) {
|
|
return response;
|
|
}
|
|
const locationURL = new URL(
|
|
locationHeaders[0][1],
|
|
response.url() ?? undefined,
|
|
);
|
|
if (locationURL.hash === "") {
|
|
locationURL.hash = request.currentUrl().hash;
|
|
}
|
|
if (locationURL.protocol !== "https:" && locationURL.protocol !== "http:") {
|
|
return networkError("Can not redirect to a non HTTP(s) url");
|
|
}
|
|
if (request.redirectCount === 20) {
|
|
return networkError("Maximum number of redirects (20) reached");
|
|
}
|
|
request.redirectCount++;
|
|
if (
|
|
response.status !== 303 &&
|
|
request.body !== null &&
|
|
request.body.source === null
|
|
) {
|
|
return networkError(
|
|
"Can not redeliver a streaming request body after a redirect",
|
|
);
|
|
}
|
|
if (
|
|
((response.status === 301 || response.status === 302) &&
|
|
request.method === "POST") ||
|
|
(response.status === 303 &&
|
|
request.method !== "GET" &&
|
|
request.method !== "HEAD")
|
|
) {
|
|
request.method = "GET";
|
|
request.body = null;
|
|
for (let i = 0; i < request.headerList.length; i++) {
|
|
if (
|
|
ArrayPrototypeIncludes(
|
|
REQUEST_BODY_HEADER_NAMES,
|
|
byteLowerCase(request.headerList[i][0]),
|
|
)
|
|
) {
|
|
ArrayPrototypeSplice(request.headerList, i, 1);
|
|
i--;
|
|
}
|
|
}
|
|
}
|
|
if (request.body !== null) {
|
|
const res = extractBody(request.body.source);
|
|
request.body = res.body;
|
|
}
|
|
ArrayPrototypePush(request.urlList, locationURL.href);
|
|
return mainFetch(request, true, terminator);
|
|
}
|
|
|
|
/**
|
|
* @param {RequestInfo} input
|
|
* @param {RequestInit} init
|
|
*/
|
|
function fetch(input, init = {}) {
|
|
// 1.
|
|
return new Promise((resolve, reject) => {
|
|
const prefix = "Failed to call 'fetch'";
|
|
webidl.requiredArguments(arguments.length, 1, { prefix });
|
|
// 2.
|
|
const requestObject = new Request(input, init);
|
|
// 3.
|
|
const request = toInnerRequest(requestObject);
|
|
// 4.
|
|
if (requestObject.signal.aborted) {
|
|
reject(abortFetch(request, null, requestObject.signal.reason));
|
|
return;
|
|
}
|
|
|
|
// 7.
|
|
let responseObject = null;
|
|
// 9.
|
|
let locallyAborted = false;
|
|
// 10.
|
|
function onabort() {
|
|
locallyAborted = true;
|
|
reject(
|
|
abortFetch(request, responseObject, requestObject.signal.reason),
|
|
);
|
|
}
|
|
requestObject.signal[abortSignal.add](onabort);
|
|
|
|
if (!requestObject.headers.has("Accept")) {
|
|
ArrayPrototypePush(request.headerList, ["Accept", "*/*"]);
|
|
}
|
|
|
|
// 12.
|
|
PromisePrototypeCatch(
|
|
PromisePrototypeThen(
|
|
mainFetch(request, false, requestObject.signal),
|
|
(response) => {
|
|
// 12.1.
|
|
if (locallyAborted) return;
|
|
// 12.2.
|
|
if (response.aborted) {
|
|
reject(
|
|
abortFetch(
|
|
request,
|
|
responseObject,
|
|
requestObject.signal.reason,
|
|
),
|
|
);
|
|
requestObject.signal[abortSignal.remove](onabort);
|
|
return;
|
|
}
|
|
// 12.3.
|
|
if (response.type === "error") {
|
|
const err = new TypeError(
|
|
"Fetch failed: " + (response.error ?? "unknown error"),
|
|
);
|
|
reject(err);
|
|
requestObject.signal[abortSignal.remove](onabort);
|
|
return;
|
|
}
|
|
responseObject = fromInnerResponse(response, "immutable");
|
|
resolve(responseObject);
|
|
requestObject.signal[abortSignal.remove](onabort);
|
|
},
|
|
),
|
|
(err) => {
|
|
reject(err);
|
|
requestObject.signal[abortSignal.remove](onabort);
|
|
},
|
|
);
|
|
});
|
|
}
|
|
|
|
function abortFetch(request, responseObject, error) {
|
|
if (request.body !== null) {
|
|
if (WeakMapPrototypeHas(requestBodyReaders, request)) {
|
|
WeakMapPrototypeGet(requestBodyReaders, request).cancel(error);
|
|
} else {
|
|
request.body.cancel(error);
|
|
}
|
|
}
|
|
if (responseObject !== null) {
|
|
const response = toInnerResponse(responseObject);
|
|
if (response.body !== null) response.body.error(error);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* Handle the Promise<Response> argument to the WebAssembly streaming
|
|
* APIs. This function should be registered through
|
|
* `Deno.core.setWasmStreamingCallback`.
|
|
*
|
|
* @param {any} source The source parameter that the WebAssembly
|
|
* streaming API was called with.
|
|
* @param {number} rid An rid that represents the wasm streaming
|
|
* resource.
|
|
*/
|
|
function handleWasmStreaming(source, rid) {
|
|
// This implements part of
|
|
// https://webassembly.github.io/spec/web-api/#compile-a-potential-webassembly-response
|
|
(async () => {
|
|
try {
|
|
const res = webidl.converters["Response"](await source, {
|
|
prefix: "Failed to call 'WebAssembly.compileStreaming'",
|
|
context: "Argument 1",
|
|
});
|
|
|
|
// 2.3.
|
|
// The spec is ambiguous here, see
|
|
// https://github.com/WebAssembly/spec/issues/1138. The WPT tests
|
|
// expect the raw value of the Content-Type attribute lowercased.
|
|
// We ignore this for file:// because file fetches don't have a
|
|
// Content-Type.
|
|
if (!StringPrototypeStartsWith(res.url, "file://")) {
|
|
const contentType = res.headers.get("Content-Type");
|
|
if (
|
|
typeof contentType !== "string" ||
|
|
StringPrototypeToLowerCase(contentType) !== "application/wasm"
|
|
) {
|
|
throw new TypeError("Invalid WebAssembly content type.");
|
|
}
|
|
}
|
|
|
|
// 2.5.
|
|
if (!res.ok) {
|
|
throw new TypeError(`HTTP status code ${res.status}`);
|
|
}
|
|
|
|
// Pass the resolved URL to v8.
|
|
core.opSync("op_wasm_streaming_set_url", rid, res.url);
|
|
|
|
// 2.6.
|
|
// Rather than consuming the body as an ArrayBuffer, this passes each
|
|
// chunk to the feed as soon as it's available.
|
|
if (res.body !== null) {
|
|
const reader = res.body.getReader();
|
|
while (true) {
|
|
const { value: chunk, done } = await reader.read();
|
|
if (done) break;
|
|
core.opSync("op_wasm_streaming_feed", rid, chunk);
|
|
}
|
|
}
|
|
|
|
// 2.7.
|
|
core.close(rid);
|
|
} catch (err) {
|
|
// 2.8 and 3
|
|
core.opSync("op_wasm_streaming_abort", rid, err);
|
|
}
|
|
})();
|
|
}
|
|
|
|
window.__bootstrap.fetch ??= {};
|
|
window.__bootstrap.fetch.fetch = fetch;
|
|
window.__bootstrap.fetch.handleWasmStreaming = handleWasmStreaming;
|
|
})(this);
|