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js: add experimental interface for integrating rclone into browsers

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This works by compiling rclone to wasm and exporting the RC api to
javascript.
This commit is contained in:
Nick Craig-Wood 2020-08-01 15:36:20 +01:00
parent 3a14b1d5a9
commit aab9aa8a2e
8 changed files with 830 additions and 0 deletions
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36
fs/rc/js/loader.js Normal file
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var rc;
var rcValidResolve
var rcValid = new Promise(resolve => {
rcValidResolve = resolve
});
var script = document.createElement('script');
script.src = "wasm_exec.js";
script.onload = function () {
if (!WebAssembly.instantiateStreaming) { // polyfill
WebAssembly.instantiateStreaming = async (resp, importObject) => {
const source = await (await resp).arrayBuffer();
return await WebAssembly.instantiate(source, importObject);
};
}
const go = new Go();
WebAssembly.instantiateStreaming(fetch("rclone.wasm"), go.importObject).then((result) => {
go.run(result.instance);
});
};
document.head.appendChild(script);
rcValid.then(() => {
// Some examples of using the rc call
//
// The rc call takes two parameters, method and input object and
// returns an output object.
//
// If the output object has an "error" and a "status" then it is an
// error (it would be nice to signal this out of band).
console.log("core/version", rc("core/version", null))
console.log("core/version", rc("rc/noop", {"string":"one",number:2}))
console.log("core/version", rc("operations/mkdir", {"fs":":memory:","remote":"bucket"}))
console.log("core/version", rc("operations/list", {"fs":":memory:","remote":"bucket"}))
})