mirror of
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Working WASM Example
License: MIT Signed-off-by: Łukasz Magiera <magik6k@gmail.com>
This commit is contained in:
Łukasz Magiera
parent
4071ebe806
commit
7b3da65077
3
Rules.mk
3
Rules.mk
@ -53,6 +53,9 @@ include $(dir)/Rules.mk
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dir := filestore/pb
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include $(dir)/Rules.mk
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dir := misc/wasm
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include $(dir)/Rules.mk
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# -------------------- #
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# universal rules #
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1
misc/wasm/.gitignore
vendored
Normal file
1
misc/wasm/.gitignore
vendored
Normal file
@ -0,0 +1 @@
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ipfs.wasm
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17
misc/wasm/Rules.mk
Normal file
17
misc/wasm/Rules.mk
Normal file
@ -0,0 +1,17 @@
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include mk/header.mk
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# TODO: target disabling all incompatible plugins
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$(d)/ipfs.wasm:
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GOOS=js GOARCH=wasm $(GOCC) build -tags="nofuse purego" -ldflags="-X "github.com/ipfs/go-ipfs".CurrentCommit=47e9466ac" -o "$@" "github.com/ipfs/go-ipfs/misc/wasm"
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.PHONY: $(d)/ipfs.wasm
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$(d)/serve: $(d)/ipfs.wasm
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go get github.com/shurcooL/goexec
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@echo 'Listening on http://127.0.0.1:8000'
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@(cd $(@D) && goexec 'http.ListenAndServe("127.0.0.1:8000", http.FileServer(http.Dir(".")))')
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.PHONY: $(d)/serve
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include mk/footer.mk
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52
misc/wasm/index.html
Normal file
52
misc/wasm/index.html
Normal file
@ -0,0 +1,52 @@
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<!doctype html>
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<!--
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Copyright 2018 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file.
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-->
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<html>
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<head>
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<meta charset="utf-8">
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<title>Go wasm</title>
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</head>
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<body>
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<script src="wasm_exec.js"></script>
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<script>
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if (!WebAssembly.instantiateStreaming) { // polyfill
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WebAssembly.instantiateStreaming = async (resp, importObject) => {
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const source = await (await resp).arrayBuffer();
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return await WebAssembly.instantiate(source, importObject);
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};
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}
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const go = new Go();
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let mod, inst;
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WebAssembly.instantiateStreaming(fetch("ipfs.wasm"), go.importObject).then((result) => {
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mod = result.module;
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inst = result.instance;
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document.getElementById("runButton").disabled = false;
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});
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async function run() {
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console.clear();
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await go.run(inst);
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inst = await WebAssembly.instantiate(mod, go.importObject); // reset instance
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}
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</script>
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<button onClick="run();" id="runButton" disabled>Run</button>
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<form id="addForm" action="#">
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<input id="toadd" placeholder="text to add" style="width: 50em">
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</form>
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<div id="results">
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<p>-results-</p>
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</div>
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<div id="peers"></div>
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</body>
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</html>
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437
misc/wasm/wasm_exec.js
Normal file
437
misc/wasm/wasm_exec.js
Normal file
@ -0,0 +1,437 @@
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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(() => {
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// Map web browser API and Node.js API to a single common API (preferring web standards over Node.js API).
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const isNodeJS = typeof process !== "undefined";
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if (isNodeJS) {
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global.require = require;
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global.fs = require("fs");
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const nodeCrypto = require("crypto");
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global.crypto = {
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getRandomValues(b) {
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nodeCrypto.randomFillSync(b);
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},
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};
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global.performance = {
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now() {
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const [sec, nsec] = process.hrtime();
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return sec * 1000 + nsec / 1000000;
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},
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};
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const util = require("util");
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global.TextEncoder = util.TextEncoder;
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global.TextDecoder = util.TextDecoder;
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} else {
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if (typeof window !== "undefined") {
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window.global = window;
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} else if (typeof self !== "undefined") {
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self.global = self;
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} else {
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throw new Error("cannot export Go (neither window nor self is defined)");
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}
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let outputBuf = "";
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global.fs = {
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constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
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writeSync(fd, buf) {
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outputBuf += decoder.decode(buf);
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const nl = outputBuf.lastIndexOf("\n");
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if (nl != -1) {
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console.log(outputBuf.substr(0, nl));
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outputBuf = outputBuf.substr(nl + 1);
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}
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return buf.length;
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},
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openSync(path, flags, mode) {
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const err = new Error("not implemented");
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err.code = "ENOSYS";
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throw err;
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},
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};
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}
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const encoder = new TextEncoder("utf-8");
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const decoder = new TextDecoder("utf-8");
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global.Go = class {
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constructor() {
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this.argv = ["js"];
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this.env = {};
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this.exit = (code) => {
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if (code !== 0) {
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console.warn("exit code:", code);
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}
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};
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this._callbackTimeouts = new Map();
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this._nextCallbackTimeoutID = 1;
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const mem = () => {
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// The buffer may change when requesting more memory.
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return new DataView(this._inst.exports.mem.buffer);
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}
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const setInt64 = (addr, v) => {
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mem().setUint32(addr + 0, v, true);
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mem().setUint32(addr + 4, Math.floor(v / 4294967296), true);
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}
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const getInt64 = (addr) => {
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const low = mem().getUint32(addr + 0, true);
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const high = mem().getInt32(addr + 4, true);
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return low + high * 4294967296;
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}
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const loadValue = (addr) => {
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const f = mem().getFloat64(addr, true);
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if (!isNaN(f)) {
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return f;
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}
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const id = mem().getUint32(addr, true);
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return this._values[id];
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}
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const storeValue = (addr, v) => {
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const nanHead = 0x7FF80000;
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if (typeof v === "number") {
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if (isNaN(v)) {
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 0, true);
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return;
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}
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mem().setFloat64(addr, v, true);
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return;
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}
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switch (v) {
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case undefined:
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 1, true);
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return;
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case null:
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 2, true);
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return;
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case true:
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 3, true);
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return;
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case false:
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mem().setUint32(addr + 4, nanHead, true);
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mem().setUint32(addr, 4, true);
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return;
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}
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let ref = this._refs.get(v);
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if (ref === undefined) {
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ref = this._values.length;
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this._values.push(v);
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this._refs.set(v, ref);
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}
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let typeFlag = 0;
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switch (typeof v) {
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case "string":
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typeFlag = 1;
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break;
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case "symbol":
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typeFlag = 2;
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break;
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case "function":
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typeFlag = 3;
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break;
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}
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mem().setUint32(addr + 4, nanHead | typeFlag, true);
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mem().setUint32(addr, ref, true);
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}
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const loadSlice = (addr) => {
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const array = getInt64(addr + 0);
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const len = getInt64(addr + 8);
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return new Uint8Array(this._inst.exports.mem.buffer, array, len);
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}
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const loadSliceOfValues = (addr) => {
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const array = getInt64(addr + 0);
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const len = getInt64(addr + 8);
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const a = new Array(len);
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for (let i = 0; i < len; i++) {
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a[i] = loadValue(array + i * 8);
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}
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return a;
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}
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const loadString = (addr) => {
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const saddr = getInt64(addr + 0);
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const len = getInt64(addr + 8);
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return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
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}
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const timeOrigin = Date.now() - performance.now();
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this.importObject = {
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go: {
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// func wasmExit(code int32)
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"runtime.wasmExit": (sp) => {
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const code = mem().getInt32(sp + 8, true);
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this.exited = true;
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delete this._inst;
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delete this._values;
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delete this._refs;
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this.exit(code);
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},
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// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
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"runtime.wasmWrite": (sp) => {
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const fd = getInt64(sp + 8);
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const p = getInt64(sp + 16);
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const n = mem().getInt32(sp + 24, true);
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fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
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},
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// func nanotime() int64
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"runtime.nanotime": (sp) => {
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setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
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},
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// func walltime() (sec int64, nsec int32)
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"runtime.walltime": (sp) => {
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const msec = (new Date).getTime();
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setInt64(sp + 8, msec / 1000);
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mem().setInt32(sp + 16, (msec % 1000) * 1000000, true);
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},
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// func scheduleCallback(delay int64) int32
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"runtime.scheduleCallback": (sp) => {
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const id = this._nextCallbackTimeoutID;
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this._nextCallbackTimeoutID++;
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this._callbackTimeouts.set(id, setTimeout(
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() => { this._resolveCallbackPromise(); },
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getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
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));
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mem().setInt32(sp + 16, id, true);
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},
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// func clearScheduledCallback(id int32)
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"runtime.clearScheduledCallback": (sp) => {
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const id = mem().getInt32(sp + 8, true);
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clearTimeout(this._callbackTimeouts.get(id));
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this._callbackTimeouts.delete(id);
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},
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// func getRandomData(r []byte)
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"runtime.getRandomData": (sp) => {
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crypto.getRandomValues(loadSlice(sp + 8));
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},
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// func stringVal(value string) ref
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"syscall/js.stringVal": (sp) => {
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storeValue(sp + 24, loadString(sp + 8));
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},
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// func valueGet(v ref, p string) ref
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"syscall/js.valueGet": (sp) => {
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storeValue(sp + 32, Reflect.get(loadValue(sp + 8), loadString(sp + 16)));
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},
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// func valueSet(v ref, p string, x ref)
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"syscall/js.valueSet": (sp) => {
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Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
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},
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// func valueIndex(v ref, i int) ref
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"syscall/js.valueIndex": (sp) => {
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storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
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},
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// valueSetIndex(v ref, i int, x ref)
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"syscall/js.valueSetIndex": (sp) => {
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Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
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},
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// func valueCall(v ref, m string, args []ref) (ref, bool)
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"syscall/js.valueCall": (sp) => {
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try {
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const v = loadValue(sp + 8);
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const m = Reflect.get(v, loadString(sp + 16));
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const args = loadSliceOfValues(sp + 32);
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storeValue(sp + 56, Reflect.apply(m, v, args));
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mem().setUint8(sp + 64, 1);
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} catch (err) {
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storeValue(sp + 56, err);
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mem().setUint8(sp + 64, 0);
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}
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},
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// func valueInvoke(v ref, args []ref) (ref, bool)
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"syscall/js.valueInvoke": (sp) => {
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try {
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const v = loadValue(sp + 8);
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const args = loadSliceOfValues(sp + 16);
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storeValue(sp + 40, Reflect.apply(v, undefined, args));
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mem().setUint8(sp + 48, 1);
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} catch (err) {
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storeValue(sp + 40, err);
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mem().setUint8(sp + 48, 0);
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}
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},
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// func valueNew(v ref, args []ref) (ref, bool)
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"syscall/js.valueNew": (sp) => {
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try {
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const v = loadValue(sp + 8);
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const args = loadSliceOfValues(sp + 16);
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storeValue(sp + 40, Reflect.construct(v, args));
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mem().setUint8(sp + 48, 1);
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} catch (err) {
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storeValue(sp + 40, err);
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mem().setUint8(sp + 48, 0);
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}
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},
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// func valueLength(v ref) int
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"syscall/js.valueLength": (sp) => {
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setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
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},
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|
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// valuePrepareString(v ref) (ref, int)
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"syscall/js.valuePrepareString": (sp) => {
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const str = encoder.encode(String(loadValue(sp + 8)));
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storeValue(sp + 16, str);
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setInt64(sp + 24, str.length);
|
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},
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|
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// valueLoadString(v ref, b []byte)
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"syscall/js.valueLoadString": (sp) => {
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const str = loadValue(sp + 8);
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loadSlice(sp + 16).set(str);
|
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},
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|
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// func valueInstanceOf(v ref, t ref) bool
|
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"syscall/js.valueInstanceOf": (sp) => {
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mem().setUint8(sp + 24, loadValue(sp + 8) instanceof loadValue(sp + 16));
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},
|
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|
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"debug": (value) => {
|
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console.log(value);
|
||||
},
|
||||
}
|
||||
};
|
||||
}
|
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|
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async run(instance) {
|
||||
this._inst = instance;
|
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this._values = [ // TODO: garbage collection
|
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NaN,
|
||||
undefined,
|
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null,
|
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true,
|
||||
false,
|
||||
global,
|
||||
this._inst.exports.mem,
|
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this,
|
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];
|
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this._refs = new Map();
|
||||
this._callbackShutdown = false;
|
||||
this.exited = false;
|
||||
|
||||
const mem = new DataView(this._inst.exports.mem.buffer)
|
||||
|
||||
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
|
||||
let offset = 4096;
|
||||
|
||||
const strPtr = (str) => {
|
||||
let ptr = offset;
|
||||
new Uint8Array(mem.buffer, offset, str.length + 1).set(encoder.encode(str + "\0"));
|
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offset += str.length + (8 - (str.length % 8));
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return ptr;
|
||||
};
|
||||
|
||||
const argc = this.argv.length;
|
||||
|
||||
const argvPtrs = [];
|
||||
this.argv.forEach((arg) => {
|
||||
argvPtrs.push(strPtr(arg));
|
||||
});
|
||||
|
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const keys = Object.keys(this.env).sort();
|
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argvPtrs.push(keys.length);
|
||||
keys.forEach((key) => {
|
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argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
|
||||
});
|
||||
|
||||
const argv = offset;
|
||||
argvPtrs.forEach((ptr) => {
|
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mem.setUint32(offset, ptr, true);
|
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mem.setUint32(offset + 4, 0, true);
|
||||
offset += 8;
|
||||
});
|
||||
|
||||
while (true) {
|
||||
const callbackPromise = new Promise((resolve) => {
|
||||
this._resolveCallbackPromise = () => {
|
||||
if (this.exited) {
|
||||
throw new Error("bad callback: Go program has already exited");
|
||||
}
|
||||
setTimeout(resolve, 0); // make sure it is asynchronous
|
||||
};
|
||||
});
|
||||
this._inst.exports.run(argc, argv);
|
||||
if (this.exited) {
|
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break;
|
||||
}
|
||||
await callbackPromise;
|
||||
}
|
||||
}
|
||||
|
||||
static _makeCallbackHelper(id, pendingCallbacks, go) {
|
||||
return function() {
|
||||
pendingCallbacks.push({ id: id, args: arguments });
|
||||
go._resolveCallbackPromise();
|
||||
};
|
||||
}
|
||||
|
||||
static _makeEventCallbackHelper(preventDefault, stopPropagation, stopImmediatePropagation, fn) {
|
||||
return function(event) {
|
||||
if (preventDefault) {
|
||||
event.preventDefault();
|
||||
}
|
||||
if (stopPropagation) {
|
||||
event.stopPropagation();
|
||||
}
|
||||
if (stopImmediatePropagation) {
|
||||
event.stopImmediatePropagation();
|
||||
}
|
||||
fn(event);
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
if (isNodeJS) {
|
||||
if (process.argv.length < 3) {
|
||||
process.stderr.write("usage: go_js_wasm_exec [wasm binary] [arguments]\n");
|
||||
process.exit(1);
|
||||
}
|
||||
|
||||
const go = new Go();
|
||||
go.argv = process.argv.slice(2);
|
||||
go.env = process.env;
|
||||
go.exit = process.exit;
|
||||
WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => {
|
||||
process.on("exit", (code) => { // Node.js exits if no callback is pending
|
||||
if (code === 0 && !go.exited) {
|
||||
// deadlock, make Go print error and stack traces
|
||||
go._callbackShutdown = true;
|
||||
go._inst.exports.run();
|
||||
}
|
||||
});
|
||||
return go.run(result.instance);
|
||||
}).catch((err) => {
|
||||
throw err;
|
||||
});
|
||||
}
|
||||
})();
|
||||
141
misc/wasm/wrapper.go
Normal file
141
misc/wasm/wrapper.go
Normal file
@ -0,0 +1,141 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"encoding/base64"
|
||||
"fmt"
|
||||
"github.com/ipfs/go-ipfs/core"
|
||||
"github.com/ipfs/go-ipfs/core/coreapi"
|
||||
"github.com/ipfs/go-ipfs/keystore"
|
||||
"github.com/ipfs/go-ipfs/repo"
|
||||
"syscall/js"
|
||||
"time"
|
||||
|
||||
ci "gx/ipfs/QmNiJiXwWE3kRhZrC5ej3kSjWHm337pYfhjLGSCDNKJP2s/go-libp2p-crypto"
|
||||
"gx/ipfs/QmRBaUEQEeFWywfrZJ64QgsmvcqgLSK3VbvGMR2NM2Edpf/go-libp2p"
|
||||
"gx/ipfs/QmXWZCd8jfaHmt4UDSnjKmGcrQMw95bDGWqEeVLVJjoANX/go-ipfs-files"
|
||||
"gx/ipfs/QmY5Grm8pJdiSSVsYxx4uNRgweY72EmYwuSDbRnbFok3iY/go-libp2p-peer"
|
||||
pstore "gx/ipfs/QmZ9zH2FnLcxv1xyzFeUpDUeo55xEhZQHgveZijcxr7TLj/go-libp2p-peerstore"
|
||||
"gx/ipfs/QmcZfkbgwwwH5ZLTQRHkSQBDiDqd3skY2eU6MZRgWuXcse/go-ipfs-config"
|
||||
logging "gx/ipfs/QmcuXC5cxs79ro2cUuHs4HQ2bkDLJUYokwL8aivcX6HW3C/go-log"
|
||||
"gx/ipfs/Qmf4xQhNomPNhrtZc67qSnfJSjxjXs9LWvknJtSXwimPrM/go-datastore"
|
||||
syncds "gx/ipfs/Qmf4xQhNomPNhrtZc67qSnfJSjxjXs9LWvknJtSXwimPrM/go-datastore/sync"
|
||||
p2phost "gx/ipfs/QmfD51tKgJiTMnW9JEiDiPwsCY4mqUoxkhKhBfyW12spTC/go-libp2p-host"
|
||||
)
|
||||
|
||||
func constructPeerHost(ctx context.Context, id peer.ID, ps pstore.Peerstore, options ...libp2p.Option) (p2phost.Host, error) {
|
||||
pkey := ps.PrivKey(id)
|
||||
if pkey == nil {
|
||||
return nil, fmt.Errorf("missing private key for node ID: %s", id.Pretty())
|
||||
}
|
||||
options = append(options,
|
||||
libp2p.Identity(pkey),
|
||||
libp2p.NoTransports,
|
||||
libp2p.Transport(NewJsWs),
|
||||
libp2p.Peerstore(ps),
|
||||
libp2p.EnableAutoRelay(),
|
||||
libp2p.EnableRelay())
|
||||
return libp2p.New(ctx, options...)
|
||||
}
|
||||
|
||||
func main() {
|
||||
logging.SetDebugLogging()
|
||||
ctx := context.Background()
|
||||
|
||||
sk, pk, err := ci.GenerateKeyPair(ci.RSA, 2048)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
id, err := peer.IDFromPublicKey(pk)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
kbytes, err := sk.Bytes()
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
ident := config.Identity{
|
||||
PeerID: id.Pretty(),
|
||||
PrivKey: base64.StdEncoding.EncodeToString(kbytes),
|
||||
}
|
||||
|
||||
c := config.Config{
|
||||
Bootstrap: []string{
|
||||
"/ip4/127.0.0.1/tcp/4006/ws/ipfs/QmZatNPNW8DnpMRgSuUJjmzc6nETJi21c2quikh4jbmPKk",
|
||||
"/ip4/51.75.35.194/tcp/4002/ws/ipfs/QmVGX47BzePPqEzpkTwfUJogPZxHcifpSXsGdgyHjtk5t7",
|
||||
},
|
||||
}
|
||||
c.Identity = ident
|
||||
c.Swarm.DisableNatPortMap = true
|
||||
|
||||
r := &repo.Mock{
|
||||
C: c,
|
||||
D: syncds.MutexWrap(datastore.NewMapDatastore()),
|
||||
K: keystore.NewMemKeystore(),
|
||||
}
|
||||
|
||||
ncfg := &core.BuildCfg{
|
||||
Repo: r,
|
||||
Permanent: true, // It is temporary way to signify that node is permanent
|
||||
Online: true,
|
||||
DisableEncryptedConnections: false,
|
||||
Host: constructPeerHost,
|
||||
ExtraOpts: map[string]bool{
|
||||
"pubsub": false,
|
||||
"ipnsps": false,
|
||||
"mplex": false,
|
||||
},
|
||||
}
|
||||
|
||||
browserNode, err := core.NewNode(ctx, ncfg)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
api, err := coreapi.NewCoreAPI(browserNode)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
p, err := api.Unixfs().Add(ctx, files.NewBytesFile([]byte("an unique string not to be found anywhere else")))
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
println(p.String())
|
||||
|
||||
js.Global().Get("document").Call("getElementById", "addForm").Set("onsubmit", js.NewCallback(func(args []js.Value) {
|
||||
s := js.Global().Get("document").Call("getElementById", "toadd").Get("value").String() + "\n"
|
||||
p, err := api.Unixfs().Add(ctx, files.NewBytesFile([]byte(s)))
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
pe := js.Global().Get("document").Call("createElement", "p")
|
||||
pe.Call("appendChild", js.Global().Get("document").Call("createTextNode", p.String()))
|
||||
results := js.Global().Get("document").Call("getElementById", "results")
|
||||
results.Call("insertBefore", pe, results.Get("firstChild"))
|
||||
}))
|
||||
|
||||
t := time.Tick(time.Second)
|
||||
for range t {
|
||||
peers := js.Global().Get("document").Call("getElementById", "peers")
|
||||
peers.Set("innerHTML", "")
|
||||
list, err := api.Swarm().Peers(ctx)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
for _, ci := range list {
|
||||
pe := js.Global().Get("document").Call("createElement", "p")
|
||||
pe.Call("appendChild", js.Global().Get("document").Call("createTextNode", ci.Address().String()))
|
||||
peers.Call("appendChild", pe)
|
||||
}
|
||||
}
|
||||
|
||||
wch := make(chan struct{})
|
||||
<-wch
|
||||
}
|
||||
205
misc/wasm/wstpt.go
Normal file
205
misc/wasm/wstpt.go
Normal file
@ -0,0 +1,205 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
"gx/ipfs/QmQVUtnrNGtCRkCMpXgpApfzQjc8FDaDVxHqWH8cnZQeh5/go-multiaddr-net"
|
||||
"io"
|
||||
"net"
|
||||
"syscall/js"
|
||||
"time"
|
||||
|
||||
ma "gx/ipfs/QmRKLtwMw131aK7ugC3G7ybpumMz78YrJe5dzneyindvG1/go-multiaddr"
|
||||
"gx/ipfs/QmY5Grm8pJdiSSVsYxx4uNRgweY72EmYwuSDbRnbFok3iY/go-libp2p-peer"
|
||||
ws "gx/ipfs/QmZJpaENuYSCLnV4gWjrWhN2LMJWgTp3u2b6XZx3C12rNF/go-ws-transport"
|
||||
"gx/ipfs/Qmb3qartY8DSgRaBA3Go4EEjY1ZbXhCcvmc4orsBKMjgRg/go-libp2p-transport"
|
||||
tptu "gx/ipfs/Qmc9KUyhx1adPnHX2TBjEWvKej2Gg2kvisAFoQ74UiWYhd/go-libp2p-transport-upgrader"
|
||||
)
|
||||
|
||||
const (
|
||||
wsConnecting = iota
|
||||
wsOpen
|
||||
wsClosing
|
||||
wsClosed
|
||||
)
|
||||
|
||||
type jsws struct {
|
||||
Upgrader *tptu.Upgrader
|
||||
}
|
||||
|
||||
type jsconn struct {
|
||||
ready chan struct{}
|
||||
|
||||
raddr ma.Multiaddr
|
||||
wsock js.Value
|
||||
|
||||
readR *io.PipeReader
|
||||
readW *io.PipeWriter
|
||||
|
||||
cb js.Callback
|
||||
}
|
||||
|
||||
func (c *jsconn) Read(b []byte) (n int, err error) {
|
||||
return c.readR.Read(b)
|
||||
}
|
||||
|
||||
func (c *jsconn) onmessage(value []js.Value) {
|
||||
u8a := js.Global().Get("Uint8Array").New(value[0].Get("data"))
|
||||
|
||||
// there is, very likely, a much, much better way
|
||||
buf := make([]byte, u8a.Length())
|
||||
for i := range buf {
|
||||
buf[i] = byte(u8a.Index(i).Int())
|
||||
}
|
||||
|
||||
if _, err := c.readW.Write(buf); err != nil {
|
||||
panic(err)
|
||||
}
|
||||
}
|
||||
|
||||
func (c *jsconn) Write(b []byte) (n int, err error) {
|
||||
<-c.ready
|
||||
arr := js.TypedArrayOf(b)
|
||||
defer arr.Release()
|
||||
c.wsock.Call("send", arr)
|
||||
return len(b), err
|
||||
}
|
||||
|
||||
func (c *jsconn) LocalAddr() net.Addr {
|
||||
a, _ := manet.ToNetAddr(c.LocalMultiaddr())
|
||||
return a //TODO: probably broken
|
||||
}
|
||||
|
||||
func (c *jsconn) RemoteAddr() net.Addr {
|
||||
a, _ := manet.ToNetAddr(c.raddr)
|
||||
return a //TODO: probably broken
|
||||
}
|
||||
|
||||
func (c *jsconn) SetDeadline(t time.Time) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *jsconn) SetReadDeadline(t time.Time) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *jsconn) SetWriteDeadline(t time.Time) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *jsconn) LocalMultiaddr() ma.Multiaddr {
|
||||
m, _ := ma.NewMultiaddr("/ip4/127.0.0.1/tcp/80/ws")
|
||||
return m
|
||||
}
|
||||
|
||||
func (c *jsconn) RemoteMultiaddr() ma.Multiaddr {
|
||||
return c.raddr
|
||||
}
|
||||
|
||||
func (c *jsconn) Close() error {
|
||||
c.wsock.Call("close")
|
||||
c.cb.Release()
|
||||
return nil // todo: errors?
|
||||
}
|
||||
|
||||
func NewJsWs(u *tptu.Upgrader) *jsws {
|
||||
return &jsws{u}
|
||||
}
|
||||
|
||||
func (t *jsws) CanDial(addr ma.Multiaddr) bool {
|
||||
return ws.WsFmt.Matches(addr)
|
||||
}
|
||||
|
||||
func (t *jsws) Protocols() []int {
|
||||
return []int{ws.WsProtocol.Code}
|
||||
}
|
||||
|
||||
func (t *jsws) Proxy() bool {
|
||||
return false
|
||||
}
|
||||
|
||||
func (t *jsws) Dial(ctx context.Context, raddr ma.Multiaddr, p peer.ID) (transport.Conn, error) {
|
||||
var addr = ""
|
||||
var err error
|
||||
|
||||
ps := raddr.Protocols()
|
||||
if len(ps) != 3 {
|
||||
return nil, fmt.Errorf("unexpected protocol count")
|
||||
}
|
||||
|
||||
switch ps[0].Code {
|
||||
case ma.P_IP6:
|
||||
addr, err = raddr.ValueForProtocol(ps[0].Code)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
addr = fmt.Sprintf("[%s]", addr)
|
||||
case ma.P_IP4:
|
||||
addr, err = raddr.ValueForProtocol(ps[0].Code)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
default:
|
||||
return nil, fmt.Errorf("unsupported proto %d", ps[0].Code)
|
||||
}
|
||||
|
||||
switch ps[1].Code {
|
||||
case ma.P_TCP:
|
||||
port, err := raddr.ValueForProtocol(ps[1].Code)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
addr = fmt.Sprintf("%s:%s", addr, port)
|
||||
default:
|
||||
return nil, fmt.Errorf("unsupported proto %d", ps[0].Code)
|
||||
}
|
||||
|
||||
switch ps[2].Code {
|
||||
case ws.WsProtocol.Code:
|
||||
addr = "ws://" + addr
|
||||
default:
|
||||
return nil, fmt.Errorf("unsupported proto %d", ps[0].Code)
|
||||
}
|
||||
println("connecting to " + addr)
|
||||
|
||||
wsock := js.Global().Get("WebSocket").New(addr)
|
||||
rr, rw := io.Pipe()
|
||||
ready := make(chan struct{})
|
||||
|
||||
conn := &jsconn{
|
||||
ready: ready,
|
||||
|
||||
raddr: raddr,
|
||||
wsock: wsock,
|
||||
|
||||
readR: rr,
|
||||
readW: rw,
|
||||
}
|
||||
conn.cb = js.NewCallback(conn.onmessage)
|
||||
opencb := js.NewCallback(func(args []js.Value) {
|
||||
println("onopen")
|
||||
close(conn.ready)
|
||||
})
|
||||
go func() {
|
||||
<-conn.ready
|
||||
opencb.Release()
|
||||
}()
|
||||
var closecb js.Callback
|
||||
closecb = js.NewCallback(func(args []js.Value) {
|
||||
println("onclose")
|
||||
_ = conn.readR.Close()
|
||||
closecb.Release()
|
||||
})
|
||||
|
||||
wsock.Set("binaryType", "arraybuffer")
|
||||
wsock.Set("onmessage", conn.cb)
|
||||
wsock.Set("onopen", opencb)
|
||||
wsock.Set("onclose", closecb)
|
||||
|
||||
return t.Upgrader.UpgradeOutbound(ctx, t, conn, p)
|
||||
}
|
||||
|
||||
func (t *jsws) Listen(laddr ma.Multiaddr) (transport.Listener, error) {
|
||||
return nil, errors.New("not supported")
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user