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denoland-deno/ext/fetch/26_fetch.js
Luca Casonato 430b63c2c4
perf: improve async op santizer speed and accuracy (#20501)
This commit improves async op sanitizer speed by only delaying metrics
collection if there are pending ops. This
results in a speedup of around 30% for small CPU bound unit tests.

It performs this check and possible delay on every collection now,
fixing an issue with parent test leaks into steps.
2023-09-16 07:48:31 +02:00

597 lines
17 KiB
JavaScript

// Copyright 2018-2023 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" />
const core = globalThis.Deno.core;
const ops = core.ops;
import * as webidl from "ext:deno_webidl/00_webidl.js";
import { byteLowerCase } from "ext:deno_web/00_infra.js";
import { BlobPrototype } from "ext:deno_web/09_file.js";
import {
errorReadableStream,
readableStreamForRid,
ReadableStreamPrototype,
} from "ext:deno_web/06_streams.js";
import { extractBody, InnerBody } from "ext:deno_fetch/22_body.js";
import { processUrlList, toInnerRequest } from "ext:deno_fetch/23_request.js";
import {
abortedNetworkError,
fromInnerResponse,
networkError,
nullBodyStatus,
redirectStatus,
toInnerResponse,
} from "ext:deno_fetch/23_response.js";
import * as abortSignal from "ext:deno_web/03_abort_signal.js";
const primordials = globalThis.__bootstrap.primordials;
const {
ArrayPrototypePush,
ArrayPrototypeSplice,
ArrayPrototypeFilter,
ArrayPrototypeIncludes,
ObjectPrototypeIsPrototypeOf,
Promise,
PromisePrototypeThen,
PromisePrototypeCatch,
SafeArrayIterator,
SafeWeakMap,
String,
StringPrototypeStartsWith,
StringPrototypeToLowerCase,
TypeError,
Uint8Array,
Uint8ArrayPrototype,
WeakMapPrototypeDelete,
WeakMapPrototypeGet,
WeakMapPrototypeHas,
WeakMapPrototypeSet,
} = primordials;
const REQUEST_BODY_HEADER_NAMES = [
"content-encoding",
"content-language",
"content-location",
"content-type",
];
const requestBodyReaders = new SafeWeakMap();
/**
* @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(method, url, headers, clientRid, hasBody, bodyLength, body) {
return ops.op_fetch(
method,
url,
headers,
clientRid,
hasBody,
bodyLength,
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);
}
/**
* @param {number} responseBodyRid
* @param {AbortSignal} [terminator]
* @returns {ReadableStream<Uint8Array>}
*/
function createResponseBodyStream(responseBodyRid, terminator) {
const readable = readableStreamForRid(responseBodyRid);
function onAbort() {
errorReadableStream(readable, terminator.reason);
core.tryClose(responseBodyRid);
}
// TODO(lucacasonato): clean up registration
terminator[abortSignal.add](onAbort);
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));
processUrlList(req.urlList, req.urlListProcessed);
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
? []
: [...new SafeArrayIterator(req.urlListProcessed)],
};
}
/** @type {ReadableStream<Uint8Array> | Uint8Array | null} */
let reqBody = null;
if (req.body !== null) {
if (
ObjectPrototypeIsPrototypeOf(
ReadableStreamPrototype,
req.body.streamOrStatic,
)
) {
if (
req.body.length === null ||
ObjectPrototypeIsPrototypeOf(BlobPrototype, req.body.source)
) {
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(
req.method,
req.currentUrl(),
req.headerList,
req.clientRid,
reqBody !== null,
req.body?.length,
ObjectPrototypeIsPrototypeOf(Uint8ArrayPrototype, reqBody) ? reqBody : null,
);
function onAbort() {
if (cancelHandleRid !== null) {
core.tryClose(cancelHandleRid);
}
if (requestBodyRid !== null) {
core.tryClose(requestBodyRid);
}
}
terminator[abortSignal.add](onAbort);
let requestSendError;
let requestSendErrorSet = false;
async function propagateError(err, message) {
// TODO(lucacasonato): propagate error into response body stream
try {
await core.writeTypeError(requestBodyRid, message);
} catch (err) {
if (!requestSendErrorSet) {
requestSendErrorSet = true;
requestSendError = err;
}
}
if (!requestSendErrorSet) {
requestSendErrorSet = true;
requestSendError = err;
}
}
if (requestBodyRid !== null) {
if (
reqBody === null ||
!ObjectPrototypeIsPrototypeOf(ReadableStreamPrototype, reqBody)
) {
throw new TypeError("Unreachable");
}
const reader = reqBody.getReader();
WeakMapPrototypeSet(requestBodyReaders, req, reader);
(async () => {
let done = false;
while (!done) {
let val;
try {
const res = await reader.read();
done = res.done;
val = res.value;
} catch (err) {
if (terminator.aborted) break;
await propagateError(err, "failed to read");
break;
}
if (done) break;
if (!ObjectPrototypeIsPrototypeOf(Uint8ArrayPrototype, val)) {
const error = new TypeError(
"Item in request body ReadableStream is not a Uint8Array",
);
await reader.cancel(error);
await propagateError(error, error.message);
break;
}
try {
await core.writeAll(requestBodyRid, val);
} catch (err) {
if (terminator.aborted) break;
await reader.cancel(err);
await propagateError(err, "failed to write");
break;
}
}
if (done && !terminator.aborted) {
try {
await core.shutdown(requestBodyRid);
} catch (err) {
if (!terminator.aborted) {
await propagateError(err, "failed to flush");
}
}
}
WeakMapPrototypeDelete(requestBodyReaders, req);
reader.releaseLock();
core.tryClose(requestBodyRid);
})();
}
let resp;
try {
resp = await opFetchSend(requestRid);
} catch (err) {
if (terminator.aborted) return;
if (requestSendErrorSet) {
// if the request body stream errored, we want to propagate that error
// instead of the original error from opFetchSend
throw new TypeError("Failed to fetch: request body stream errored", {
cause: requestSendError,
});
}
if (requestBodyRid !== null) {
core.tryClose(requestBodyRid);
}
throw err;
} finally {
if (cancelHandleRid !== null) {
core.tryClose(cancelHandleRid);
}
}
if (terminator.aborted) return abortedNetworkError();
processUrlList(req.urlList, req.urlListProcessed);
/** @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.urlListProcessed,
};
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) {
processUrlList(req.urlList, req.urlListProcessed);
response.urlList = [...new SafeArrayIterator(req.urlListProcessed)];
}
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 = {}) {
// There is an async dispatch later that causes a stack trace disconnect.
// We reconnect it by assigning the result of that dispatch to `opPromise`,
// awaiting `opPromise` in an inner function also named `fetch()` and
// returning the result from that.
let opPromise = undefined;
// 1.
const result = 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", "*/*"]);
}
if (!requestObject.headers.has("Accept-Language")) {
ArrayPrototypePush(request.headerList, ["Accept-Language", "*"]);
}
// 12.
opPromise = 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);
},
);
});
if (opPromise) {
PromisePrototypeCatch(result, () => {});
return (async function fetch() {
await opPromise;
return result;
})();
}
return result;
}
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 Response argument to the WebAssembly streaming APIs, after
* resolving if it was passed as a promise. This function should be registered
* through `Deno.core.setWasmStreamingCallback`.
*
* @param {any} source The source parameter that the WebAssembly streaming API
* was called with. If it was called with a Promise, `source` is the resolved
* value of that promise.
* @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
try {
const res = webidl.converters["Response"](
source,
"Failed to call 'WebAssembly.compileStreaming'",
"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.
ops.op_wasm_streaming_set_url(rid, res.url);
if (res.body !== null) {
// 2.6.
// Rather than consuming the body as an ArrayBuffer, this passes each
// chunk to the feed as soon as it's available.
PromisePrototypeThen(
(async () => {
const reader = res.body.getReader();
while (true) {
const { value: chunk, done } = await reader.read();
if (done) break;
ops.op_wasm_streaming_feed(rid, chunk);
}
})(),
// 2.7
() => core.close(rid),
// 2.8
(err) => core.abortWasmStreaming(rid, err),
);
} else {
// 2.7
core.close(rid);
}
} catch (err) {
// 2.8
core.abortWasmStreaming(rid, err);
}
}
export { fetch, handleWasmStreaming };