mirror of
https://github.com/denoland/deno.git
synced 2024-11-23 15:16:54 -05:00
585 lines
18 KiB
TypeScript
585 lines
18 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
|
|
import {
|
|
assert,
|
|
createResolvable,
|
|
notImplemented,
|
|
isTypedArray
|
|
} from "./util.ts";
|
|
import * as domTypes from "./dom_types.ts";
|
|
import { TextDecoder, TextEncoder } from "./text_encoding.ts";
|
|
import { DenoBlob, bytesSymbol as blobBytesSymbol } from "./blob.ts";
|
|
import { Headers } from "./headers.ts";
|
|
import * as io from "./io.ts";
|
|
import { read, close } from "./files.ts";
|
|
import { Buffer } from "./buffer.ts";
|
|
import { FormData } from "./form_data.ts";
|
|
import { URL } from "./url.ts";
|
|
import { URLSearchParams } from "./url_search_params.ts";
|
|
import * as dispatch from "./dispatch.ts";
|
|
import { sendAsync } from "./dispatch_json.ts";
|
|
|
|
function getHeaderValueParams(value: string): Map<string, string> {
|
|
const params = new Map();
|
|
// Forced to do so for some Map constructor param mismatch
|
|
value
|
|
.split(";")
|
|
.slice(1)
|
|
.map((s): string[] => s.trim().split("="))
|
|
.filter((arr): boolean => arr.length > 1)
|
|
.map(([k, v]): [string, string] => [k, v.replace(/^"([^"]*)"$/, "$1")])
|
|
.forEach(([k, v]): Map<string, string> => params.set(k, v));
|
|
return params;
|
|
}
|
|
|
|
function hasHeaderValueOf(s: string, value: string): boolean {
|
|
return new RegExp(`^${value}[\t\s]*;?`).test(s);
|
|
}
|
|
|
|
class Body implements domTypes.Body, domTypes.ReadableStream, io.ReadCloser {
|
|
private _bodyUsed = false;
|
|
private _bodyPromise: null | Promise<ArrayBuffer> = null;
|
|
private _data: ArrayBuffer | null = null;
|
|
readonly locked: boolean = false; // TODO
|
|
readonly body: null | Body = this;
|
|
|
|
constructor(private rid: number, readonly contentType: string) {}
|
|
|
|
private async _bodyBuffer(): Promise<ArrayBuffer> {
|
|
assert(this._bodyPromise == null);
|
|
const buf = new Buffer();
|
|
try {
|
|
const nread = await buf.readFrom(this);
|
|
const ui8 = buf.bytes();
|
|
assert(ui8.byteLength === nread);
|
|
this._data = ui8.buffer.slice(
|
|
ui8.byteOffset,
|
|
ui8.byteOffset + nread
|
|
) as ArrayBuffer;
|
|
assert(this._data.byteLength === nread);
|
|
} finally {
|
|
this.close();
|
|
}
|
|
|
|
return this._data;
|
|
}
|
|
|
|
async arrayBuffer(): Promise<ArrayBuffer> {
|
|
// If we've already bufferred the response, just return it.
|
|
if (this._data != null) {
|
|
return this._data;
|
|
}
|
|
|
|
// If there is no _bodyPromise yet, start it.
|
|
if (this._bodyPromise == null) {
|
|
this._bodyPromise = this._bodyBuffer();
|
|
}
|
|
|
|
return this._bodyPromise;
|
|
}
|
|
|
|
async blob(): Promise<domTypes.Blob> {
|
|
const arrayBuffer = await this.arrayBuffer();
|
|
return new DenoBlob([arrayBuffer], {
|
|
type: this.contentType
|
|
});
|
|
}
|
|
|
|
// ref: https://fetch.spec.whatwg.org/#body-mixin
|
|
async formData(): Promise<domTypes.FormData> {
|
|
const formData = new FormData();
|
|
const enc = new TextEncoder();
|
|
if (hasHeaderValueOf(this.contentType, "multipart/form-data")) {
|
|
const params = getHeaderValueParams(this.contentType);
|
|
if (!params.has("boundary")) {
|
|
// TypeError is required by spec
|
|
throw new TypeError("multipart/form-data must provide a boundary");
|
|
}
|
|
// ref: https://tools.ietf.org/html/rfc2046#section-5.1
|
|
const boundary = params.get("boundary")!;
|
|
const dashBoundary = `--${boundary}`;
|
|
const delimiter = `\r\n${dashBoundary}`;
|
|
const closeDelimiter = `${delimiter}--`;
|
|
|
|
const body = await this.text();
|
|
let bodyParts: string[];
|
|
const bodyEpilogueSplit = body.split(closeDelimiter);
|
|
if (bodyEpilogueSplit.length < 2) {
|
|
bodyParts = [];
|
|
} else {
|
|
// discard epilogue
|
|
const bodyEpilogueTrimmed = bodyEpilogueSplit[0];
|
|
// first boundary treated special due to optional prefixed \r\n
|
|
const firstBoundaryIndex = bodyEpilogueTrimmed.indexOf(dashBoundary);
|
|
if (firstBoundaryIndex < 0) {
|
|
throw new TypeError("Invalid boundary");
|
|
}
|
|
const bodyPreambleTrimmed = bodyEpilogueTrimmed
|
|
.slice(firstBoundaryIndex + dashBoundary.length)
|
|
.replace(/^[\s\r\n\t]+/, ""); // remove transport-padding CRLF
|
|
// trimStart might not be available
|
|
// Be careful! body-part allows trailing \r\n!
|
|
// (as long as it is not part of `delimiter`)
|
|
bodyParts = bodyPreambleTrimmed
|
|
.split(delimiter)
|
|
.map((s): string => s.replace(/^[\s\r\n\t]+/, ""));
|
|
// TODO: LWSP definition is actually trickier,
|
|
// but should be fine in our case since without headers
|
|
// we should just discard the part
|
|
}
|
|
for (const bodyPart of bodyParts) {
|
|
const headers = new Headers();
|
|
const headerOctetSeperatorIndex = bodyPart.indexOf("\r\n\r\n");
|
|
if (headerOctetSeperatorIndex < 0) {
|
|
continue; // Skip unknown part
|
|
}
|
|
const headerText = bodyPart.slice(0, headerOctetSeperatorIndex);
|
|
const octets = bodyPart.slice(headerOctetSeperatorIndex + 4);
|
|
|
|
// TODO: use textproto.readMIMEHeader from deno_std
|
|
const rawHeaders = headerText.split("\r\n");
|
|
for (const rawHeader of rawHeaders) {
|
|
const sepIndex = rawHeader.indexOf(":");
|
|
if (sepIndex < 0) {
|
|
continue; // Skip this header
|
|
}
|
|
const key = rawHeader.slice(0, sepIndex);
|
|
const value = rawHeader.slice(sepIndex + 1);
|
|
headers.set(key, value);
|
|
}
|
|
if (!headers.has("content-disposition")) {
|
|
continue; // Skip unknown part
|
|
}
|
|
// Content-Transfer-Encoding Deprecated
|
|
const contentDisposition = headers.get("content-disposition")!;
|
|
const partContentType = headers.get("content-type") || "text/plain";
|
|
// TODO: custom charset encoding (needs TextEncoder support)
|
|
// const contentTypeCharset =
|
|
// getHeaderValueParams(partContentType).get("charset") || "";
|
|
if (!hasHeaderValueOf(contentDisposition, "form-data")) {
|
|
continue; // Skip, might not be form-data
|
|
}
|
|
const dispositionParams = getHeaderValueParams(contentDisposition);
|
|
if (!dispositionParams.has("name")) {
|
|
continue; // Skip, unknown name
|
|
}
|
|
const dispositionName = dispositionParams.get("name")!;
|
|
if (dispositionParams.has("filename")) {
|
|
const filename = dispositionParams.get("filename")!;
|
|
const blob = new DenoBlob([enc.encode(octets)], {
|
|
type: partContentType
|
|
});
|
|
// TODO: based on spec
|
|
// https://xhr.spec.whatwg.org/#dom-formdata-append
|
|
// https://xhr.spec.whatwg.org/#create-an-entry
|
|
// Currently it does not mention how I could pass content-type
|
|
// to the internally created file object...
|
|
formData.append(dispositionName, blob, filename);
|
|
} else {
|
|
formData.append(dispositionName, octets);
|
|
}
|
|
}
|
|
return formData;
|
|
} else if (
|
|
hasHeaderValueOf(this.contentType, "application/x-www-form-urlencoded")
|
|
) {
|
|
// From https://github.com/github/fetch/blob/master/fetch.js
|
|
// Copyright (c) 2014-2016 GitHub, Inc. MIT License
|
|
const body = await this.text();
|
|
try {
|
|
body
|
|
.trim()
|
|
.split("&")
|
|
.forEach((bytes): void => {
|
|
if (bytes) {
|
|
const split = bytes.split("=");
|
|
const name = split.shift()!.replace(/\+/g, " ");
|
|
const value = split.join("=").replace(/\+/g, " ");
|
|
formData.append(
|
|
decodeURIComponent(name),
|
|
decodeURIComponent(value)
|
|
);
|
|
}
|
|
});
|
|
} catch (e) {
|
|
throw new TypeError("Invalid form urlencoded format");
|
|
}
|
|
return formData;
|
|
} else {
|
|
throw new TypeError("Invalid form data");
|
|
}
|
|
}
|
|
|
|
// eslint-disable-next-line @typescript-eslint/no-explicit-any
|
|
async json(): Promise<any> {
|
|
const text = await this.text();
|
|
return JSON.parse(text);
|
|
}
|
|
|
|
async text(): Promise<string> {
|
|
const ab = await this.arrayBuffer();
|
|
const decoder = new TextDecoder("utf-8");
|
|
return decoder.decode(ab);
|
|
}
|
|
|
|
read(p: Uint8Array): Promise<number | io.EOF> {
|
|
this._bodyUsed = true;
|
|
return read(this.rid, p);
|
|
}
|
|
|
|
close(): void {
|
|
close(this.rid);
|
|
}
|
|
|
|
async cancel(): Promise<void> {
|
|
return notImplemented();
|
|
}
|
|
|
|
getReader(): domTypes.ReadableStreamReader {
|
|
return notImplemented();
|
|
}
|
|
|
|
tee(): [domTypes.ReadableStream, domTypes.ReadableStream] {
|
|
return notImplemented();
|
|
}
|
|
|
|
[Symbol.asyncIterator](): AsyncIterableIterator<Uint8Array> {
|
|
return io.toAsyncIterator(this);
|
|
}
|
|
|
|
get bodyUsed(): boolean {
|
|
return this._bodyUsed;
|
|
}
|
|
}
|
|
|
|
export class Response implements domTypes.Response {
|
|
readonly type: domTypes.ResponseType;
|
|
readonly redirected: boolean;
|
|
headers: domTypes.Headers;
|
|
readonly trailer: Promise<domTypes.Headers>;
|
|
readonly body: null | Body;
|
|
|
|
constructor(
|
|
readonly url: string,
|
|
readonly status: number,
|
|
readonly statusText: string,
|
|
headersList: Array<[string, string]>,
|
|
rid: number,
|
|
redirected_: boolean,
|
|
readonly type_: null | domTypes.ResponseType = "default",
|
|
body_: null | Body = null
|
|
) {
|
|
this.trailer = createResolvable();
|
|
this.headers = new Headers(headersList);
|
|
const contentType = this.headers.get("content-type") || "";
|
|
|
|
if (body_ == null) {
|
|
this.body = new Body(rid, contentType);
|
|
} else {
|
|
this.body = body_;
|
|
}
|
|
|
|
if (type_ == null) {
|
|
this.type = "default";
|
|
} else {
|
|
this.type = type_;
|
|
if (type_ == "error") {
|
|
// spec: https://fetch.spec.whatwg.org/#concept-network-error
|
|
this.status = 0;
|
|
this.statusText = "";
|
|
this.headers = new Headers();
|
|
this.body = null;
|
|
/* spec for other Response types:
|
|
https://fetch.spec.whatwg.org/#concept-filtered-response-basic
|
|
Please note that type "basic" is not the same thing as "default".*/
|
|
} else if (type_ == "basic") {
|
|
for (const h of this.headers) {
|
|
/* Forbidden Response-Header Names:
|
|
https://fetch.spec.whatwg.org/#forbidden-response-header-name */
|
|
if (["set-cookie", "set-cookie2"].includes(h[0].toLowerCase())) {
|
|
this.headers.delete(h[0]);
|
|
}
|
|
}
|
|
} else if (type_ == "cors") {
|
|
/* CORS-safelisted Response-Header Names:
|
|
https://fetch.spec.whatwg.org/#cors-safelisted-response-header-name */
|
|
const allowedHeaders = [
|
|
"Cache-Control",
|
|
"Content-Language",
|
|
"Content-Length",
|
|
"Content-Type",
|
|
"Expires",
|
|
"Last-Modified",
|
|
"Pragma"
|
|
].map((c: string) => c.toLowerCase());
|
|
for (const h of this.headers) {
|
|
/* Technically this is still not standards compliant because we are
|
|
supposed to allow headers allowed in the
|
|
'Access-Control-Expose-Headers' header in the 'internal response'
|
|
However, this implementation of response doesn't seem to have an
|
|
easy way to access the internal response, so we ignore that
|
|
header.
|
|
TODO(serverhiccups): change how internal responses are handled
|
|
so we can do this properly. */
|
|
if (!allowedHeaders.includes(h[0].toLowerCase())) {
|
|
this.headers.delete(h[0]);
|
|
}
|
|
}
|
|
/* TODO(serverhiccups): Once I fix the 'internal response' thing,
|
|
these actually need to treat the internal response differently */
|
|
} else if (type_ == "opaque" || type_ == "opaqueredirect") {
|
|
this.url = "";
|
|
this.status = 0;
|
|
this.statusText = "";
|
|
this.headers = new Headers();
|
|
this.body = null;
|
|
}
|
|
}
|
|
|
|
this.redirected = redirected_;
|
|
}
|
|
|
|
private bodyViewable(): boolean {
|
|
if (
|
|
this.type == "error" ||
|
|
this.type == "opaque" ||
|
|
this.type == "opaqueredirect" ||
|
|
this.body == undefined
|
|
)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
async arrayBuffer(): Promise<ArrayBuffer> {
|
|
/* You have to do the null check here and not in the function because
|
|
* otherwise TS complains about this.body potentially being null */
|
|
if (this.bodyViewable() || this.body == null) {
|
|
return Promise.reject(new Error("Response body is null"));
|
|
}
|
|
return this.body.arrayBuffer();
|
|
}
|
|
|
|
async blob(): Promise<domTypes.Blob> {
|
|
if (this.bodyViewable() || this.body == null) {
|
|
return Promise.reject(new Error("Response body is null"));
|
|
}
|
|
return this.body.blob();
|
|
}
|
|
|
|
async formData(): Promise<domTypes.FormData> {
|
|
if (this.bodyViewable() || this.body == null) {
|
|
return Promise.reject(new Error("Response body is null"));
|
|
}
|
|
return this.body.formData();
|
|
}
|
|
|
|
// eslint-disable-next-line @typescript-eslint/no-explicit-any
|
|
async json(): Promise<any> {
|
|
if (this.bodyViewable() || this.body == null) {
|
|
return Promise.reject(new Error("Response body is null"));
|
|
}
|
|
return this.body.json();
|
|
}
|
|
|
|
async text(): Promise<string> {
|
|
if (this.bodyViewable() || this.body == null) {
|
|
return Promise.reject(new Error("Response body is null"));
|
|
}
|
|
return this.body.text();
|
|
}
|
|
|
|
get ok(): boolean {
|
|
return 200 <= this.status && this.status < 300;
|
|
}
|
|
|
|
get bodyUsed(): boolean {
|
|
if (this.body === null) return false;
|
|
return this.body.bodyUsed;
|
|
}
|
|
|
|
clone(): domTypes.Response {
|
|
if (this.bodyUsed) {
|
|
throw new TypeError(
|
|
"Failed to execute 'clone' on 'Response': Response body is already used"
|
|
);
|
|
}
|
|
|
|
const iterators = this.headers.entries();
|
|
const headersList: Array<[string, string]> = [];
|
|
for (const header of iterators) {
|
|
headersList.push(header);
|
|
}
|
|
|
|
return new Response(
|
|
this.url,
|
|
this.status,
|
|
this.statusText,
|
|
headersList,
|
|
-1,
|
|
this.redirected,
|
|
this.type,
|
|
this.body
|
|
);
|
|
}
|
|
|
|
redirect(url: URL | string, status: number): domTypes.Response {
|
|
if (![301, 302, 303, 307, 308].includes(status)) {
|
|
throw new RangeError(
|
|
"The redirection status must be one of 301, 302, 303, 307 and 308."
|
|
);
|
|
}
|
|
return new Response(
|
|
"",
|
|
status,
|
|
"",
|
|
[["Location", typeof url === "string" ? url : url.toString()]],
|
|
-1,
|
|
false,
|
|
"default",
|
|
null
|
|
);
|
|
}
|
|
}
|
|
|
|
interface FetchResponse {
|
|
bodyRid: number;
|
|
status: number;
|
|
statusText: string;
|
|
headers: Array<[string, string]>;
|
|
}
|
|
|
|
async function sendFetchReq(
|
|
url: string,
|
|
method: string | null,
|
|
headers: domTypes.Headers | null,
|
|
body: ArrayBufferView | undefined
|
|
): Promise<FetchResponse> {
|
|
let headerArray: Array<[string, string]> = [];
|
|
if (headers) {
|
|
headerArray = Array.from(headers.entries());
|
|
}
|
|
|
|
let zeroCopy = undefined;
|
|
if (body) {
|
|
zeroCopy = new Uint8Array(body.buffer, body.byteOffset, body.byteLength);
|
|
}
|
|
|
|
const args = {
|
|
method,
|
|
url,
|
|
headers: headerArray
|
|
};
|
|
|
|
return (await sendAsync(dispatch.OP_FETCH, args, zeroCopy)) as FetchResponse;
|
|
}
|
|
|
|
/** Fetch a resource from the network. */
|
|
export async function fetch(
|
|
input: domTypes.Request | URL | string,
|
|
init?: domTypes.RequestInit
|
|
): Promise<Response> {
|
|
let url: string;
|
|
let method: string | null = null;
|
|
let headers: domTypes.Headers | null = null;
|
|
let body: ArrayBufferView | undefined;
|
|
let redirected = false;
|
|
let remRedirectCount = 20; // TODO: use a better way to handle
|
|
|
|
if (typeof input === "string" || input instanceof URL) {
|
|
url = typeof input === "string" ? (input as string) : (input as URL).href;
|
|
if (init != null) {
|
|
method = init.method || null;
|
|
if (init.headers) {
|
|
headers =
|
|
init.headers instanceof Headers
|
|
? init.headers
|
|
: new Headers(init.headers);
|
|
} else {
|
|
headers = null;
|
|
}
|
|
|
|
// ref: https://fetch.spec.whatwg.org/#body-mixin
|
|
// Body should have been a mixin
|
|
// but we are treating it as a separate class
|
|
if (init.body) {
|
|
if (!headers) {
|
|
headers = new Headers();
|
|
}
|
|
let contentType = "";
|
|
if (typeof init.body === "string") {
|
|
body = new TextEncoder().encode(init.body);
|
|
contentType = "text/plain;charset=UTF-8";
|
|
} else if (isTypedArray(init.body)) {
|
|
body = init.body;
|
|
} else if (init.body instanceof URLSearchParams) {
|
|
body = new TextEncoder().encode(init.body.toString());
|
|
contentType = "application/x-www-form-urlencoded;charset=UTF-8";
|
|
} else if (init.body instanceof DenoBlob) {
|
|
body = init.body[blobBytesSymbol];
|
|
contentType = init.body.type;
|
|
} else {
|
|
// TODO: FormData, ReadableStream
|
|
notImplemented();
|
|
}
|
|
if (contentType && !headers.has("content-type")) {
|
|
headers.set("content-type", contentType);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
url = input.url;
|
|
method = input.method;
|
|
headers = input.headers;
|
|
|
|
//@ts-ignore
|
|
if (input._bodySource) {
|
|
body = new DataView(await input.arrayBuffer());
|
|
}
|
|
}
|
|
|
|
while (remRedirectCount) {
|
|
const fetchResponse = await sendFetchReq(url, method, headers, body);
|
|
|
|
const response = new Response(
|
|
url,
|
|
fetchResponse.status,
|
|
fetchResponse.statusText,
|
|
fetchResponse.headers,
|
|
fetchResponse.bodyRid,
|
|
redirected
|
|
);
|
|
if ([301, 302, 303, 307, 308].includes(response.status)) {
|
|
// We're in a redirect status
|
|
switch ((init && init.redirect) || "follow") {
|
|
case "error":
|
|
/* I suspect that deno will probably crash if you try to use that
|
|
rid, which suggests to me that Response needs to be refactored */
|
|
return new Response("", 0, "", [], -1, false, "error", null);
|
|
case "manual":
|
|
return new Response("", 0, "", [], -1, false, "opaqueredirect", null);
|
|
case "follow":
|
|
default:
|
|
let redirectUrl = response.headers.get("Location");
|
|
if (redirectUrl == null) {
|
|
return response; // Unspecified
|
|
}
|
|
if (
|
|
!redirectUrl.startsWith("http://") &&
|
|
!redirectUrl.startsWith("https://")
|
|
) {
|
|
redirectUrl =
|
|
url.split("//")[0] +
|
|
"//" +
|
|
url.split("//")[1].split("/")[0] +
|
|
redirectUrl; // TODO: handle relative redirection more gracefully
|
|
}
|
|
url = redirectUrl;
|
|
redirected = true;
|
|
remRedirectCount--;
|
|
}
|
|
} else {
|
|
return response;
|
|
}
|
|
}
|
|
// Return a network error due to too many redirections
|
|
throw notImplemented();
|
|
}
|