faastjs
Version:
Serverless batch computing made simple.
197 lines • 25.6 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.serializeReturnValue = exports.serializeFunctionArgs = exports.deserialize = exports.deserializeUint8Array = exports.serializeToUint8Array = exports.serialize = exports.deepCopyUndefined = void 0;
const assert_1 = require("assert");
const error_1 = require("./error");
const util_1 = require("util");
// Deep copy undefined and symbol keys from source to dest. Mainly used to see
// if the source and dest are deep equal once these differences are factored
// out.
function deepCopyUndefined(dest, source) {
const stack = [];
function isBackReference(o) {
for (const elem of stack) {
if (elem === o) {
return true;
}
}
return false;
}
function recurse(d, s) {
if (isBackReference(s) || d === undefined) {
return;
}
stack.push(s);
Object.keys(s).forEach(key => {
if (s[key] && typeof s[key] === "object") {
recurse(d[key], s[key]);
}
else if (s[key] === undefined) {
d[key] = undefined;
}
else if (typeof s[key] === "symbol") {
d[key] = s[key];
}
});
Object.getOwnPropertySymbols(s).forEach(key => {
d[key] = s[key];
});
stack.pop();
}
typeof source === "object" && recurse(dest, source);
}
exports.deepCopyUndefined = deepCopyUndefined;
const FJS_TYPE = "[faastjs type]";
function replacer(key, value) {
const orig = this[key];
const type = Object.prototype.toString.call(orig).slice(8, -1);
if (typeof orig === "object" && orig instanceof Buffer) {
return { [FJS_TYPE]: "Buffer", value };
}
switch (type) {
case "Undefined":
return { [FJS_TYPE]: type };
case "Number":
if (orig === Number.POSITIVE_INFINITY) {
return { [FJS_TYPE]: type, value: "+Infinity" };
}
else if (orig === Number.NEGATIVE_INFINITY) {
return { [FJS_TYPE]: type, value: "-Infinity" };
}
else if (Number.isNaN(orig)) {
return { [FJS_TYPE]: type, value: "NaN" };
}
return value;
case "Error": {
const errObj = {};
Object.getOwnPropertyNames(value).forEach(name => {
if (typeof value[name] === "string") {
errObj[name] = JSON.stringify(value[name], replacer);
}
});
return { [FJS_TYPE]: type, value: errObj };
}
case "Date":
return { [FJS_TYPE]: type, value };
case "Int8Array":
case "Uint8Array":
case "Uint8ClampedArray":
case "Int16Array":
case "Uint16Array":
case "Int32Array":
case "Uint32Array":
case "Float32Array":
case "Float64Array":
case "Map":
case "Set":
return { [FJS_TYPE]: type, value: [...orig] };
default:
return value;
}
}
function serialize(arg, validate = false) {
const str = JSON.stringify(arg, replacer);
if (validate) {
const deserialized = deserialize(str);
deepCopyUndefined(deserialized, arg);
(0, assert_1.deepStrictEqual)(deserialized, arg);
}
return str;
}
exports.serialize = serialize;
function serializeToUint8Array(arg, validate = false) {
const encoder = new util_1.TextEncoder();
return encoder.encode(serialize(arg, validate));
}
exports.serializeToUint8Array = serializeToUint8Array;
function reviver(_, value) {
try {
if (typeof value === "object") {
if (value.hasOwnProperty(FJS_TYPE)) {
const type = value[FJS_TYPE];
switch (type) {
case "Date":
return new Date(value["value"]);
case "Buffer":
return Buffer.from(value["value"]);
case "Error": {
const sErr = value["value"];
const err = new Error(sErr.message);
for (const key of Object.keys(sErr)) {
err[key] = JSON.parse(sErr[key], reviver);
}
return err;
}
case "Int8Array":
return new Int8Array(value["value"]);
case "Uint8Array":
return new Uint8Array(value["value"]);
case "Uint8ClampedArray":
return new Uint8ClampedArray(value["value"]);
case "Int16Array":
return new Int16Array(value["value"]);
case "Uint16Array":
return new Uint16Array(value["value"]);
case "Int32Array":
return new Int32Array(value["value"]);
case "Uint32Array":
return new Uint32Array(value["value"]);
case "Float32Array":
return new Float32Array(value["value"]);
case "Float64Array":
return new Float64Array(value["value"]);
case "Undefined":
return undefined;
case "Number": {
switch (value["value"]) {
case "+Infinity":
return Number.POSITIVE_INFINITY;
case "-Infinity":
return Number.NEGATIVE_INFINITY;
case "NaN":
return Number.NaN;
default:
return value;
}
}
case "Map":
return new Map(value["value"]);
case "Set":
return new Set(value["value"]);
}
}
}
}
catch { }
return value;
}
function deserializeUint8Array(data) {
const decoder = new util_1.TextDecoder();
return JSON.parse(decoder.decode(data), reviver);
}
exports.deserializeUint8Array = deserializeUint8Array;
function deserialize(data) {
return JSON.parse(data, reviver);
}
exports.deserialize = deserialize;
function serializeFunctionArgs(name, args, validate) {
try {
return serialize(args, validate);
}
catch (err) {
const error = new error_1.FaastError({ cause: err, name: error_1.FaastErrorNames.ESERIALIZE }, `faast: Detected '${name}' argument cannot be serialized by JSON.stringify`);
throw error;
}
}
exports.serializeFunctionArgs = serializeFunctionArgs;
function serializeReturnValue(name, returned, validate) {
try {
return serialize(returned, validate);
}
catch (err) {
const error = new error_1.FaastError({ cause: err, name: error_1.FaastErrorNames.ESERIALIZE }, `faast: Detected return value from ${name} cannot be serialized by JSON.stringify: ${(0, util_1.inspect)(returned)}`);
throw error;
}
}
exports.serializeReturnValue = serializeReturnValue;
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{ deepStrictEqual } from \"assert\";\nimport { FaastError, FaastErrorNames } from \"./error\";\nimport { inspect, TextDecoder, TextEncoder } from \"util\";\n\n// Deep copy undefined and symbol keys from source to dest. Mainly used to see\n// if the source and dest are deep equal once these differences are factored\n// out.\nexport function deepCopyUndefined(dest: object, source: object) {\n    const stack: object[] = [];\n    function isBackReference(o: object) {\n        for (const elem of stack) {\n            if (elem === o) {\n                return true;\n            }\n        }\n        return false;\n    }\n    function recurse(d: any, s: any) {\n        if (isBackReference(s) || d === undefined) {\n            return;\n        }\n        stack.push(s);\n        Object.keys(s).forEach(key => {\n            if (s[key] && typeof s[key] === \"object\") {\n                recurse(d[key], s[key]);\n            } else if (s[key] === undefined) {\n                d[key] = undefined;\n            } else if (typeof s[key] === \"symbol\") {\n                d[key] = s[key];\n            }\n        });\n        Object.getOwnPropertySymbols(s).forEach(key => {\n            d[key] = s[key];\n        });\n        stack.pop();\n    }\n    typeof source === \"object\" && recurse(dest, source);\n}\n\nconst FJS_TYPE = \"[faastjs type]\";\n\nfunction replacer(this: any, key: any, value: any) {\n    const orig = this[key];\n    const type = Object.prototype.toString.call(orig).slice(8, -1);\n    if (typeof orig === \"object\" && orig instanceof Buffer) {\n        return { [FJS_TYPE]: \"Buffer\", value };\n    }\n    switch (type) {\n        case \"Undefined\":\n            return { [FJS_TYPE]: type };\n        case \"Number\":\n            if (orig === Number.POSITIVE_INFINITY) {\n                return { [FJS_TYPE]: type, value: \"+Infinity\" };\n            } else if (orig === Number.NEGATIVE_INFINITY) {\n                return { [FJS_TYPE]: type, value: \"-Infinity\" };\n            } else if (Number.isNaN(orig)) {\n                return { [FJS_TYPE]: type, value: \"NaN\" };\n            }\n            return value;\n        case \"Error\": {\n            const errObj: any = {};\n            Object.getOwnPropertyNames(value).forEach(name => {\n                if (typeof (value as any)[name] === \"string\") {\n                    errObj[name] = JSON.stringify((value as any)[name], replacer);\n                }\n            });\n            return { [FJS_TYPE]: type, value: errObj };\n        }\n        case \"Date\":\n            return { [FJS_TYPE]: type, value };\n        case \"Int8Array\":\n        case \"Uint8Array\":\n        case \"Uint8ClampedArray\":\n        case \"Int16Array\":\n        case \"Uint16Array\":\n        case \"Int32Array\":\n        case \"Uint32Array\":\n        case \"Float32Array\":\n        case \"Float64Array\":\n        case \"Map\":\n        case \"Set\":\n            return { [FJS_TYPE]: type, value: [...orig] };\n        default:\n            return value;\n    }\n}\n\nexport function serialize(arg: any, validate: boolean = false) {\n    const str = JSON.stringify(arg, replacer);\n    if (validate) {\n        const deserialized = deserialize(str);\n        deepCopyUndefined(deserialized, arg);\n        deepStrictEqual(deserialized, arg);\n    }\n    return str;\n}\n\nexport function serializeToUint8Array(arg: any, validate: boolean = false) {\n    const encoder = new TextEncoder();\n    return encoder.encode(serialize(arg, validate));\n}\n\nfunction reviver(this: any, _: any, value: any) {\n    try {\n        if (typeof value === \"object\") {\n            if (value.hasOwnProperty(FJS_TYPE)) {\n                const type = value[FJS_TYPE];\n                switch (type) {\n                    case \"Date\":\n                        return new Date(value[\"value\"]);\n                    case \"Buffer\":\n                        return Buffer.from(value[\"value\"]);\n                    case \"Error\": {\n                        const sErr = value[\"value\"];\n                        const err = new Error(sErr.message);\n                        for (const key of Object.keys(sErr)) {\n                            (err as any)[key] = JSON.parse(sErr[key], reviver);\n                        }\n                        return err;\n                    }\n                    case \"Int8Array\":\n                        return new Int8Array(value[\"value\"]);\n                    case \"Uint8Array\":\n                        return new Uint8Array(value[\"value\"]);\n                    case \"Uint8ClampedArray\":\n                        return new Uint8ClampedArray(value[\"value\"]);\n                    case \"Int16Array\":\n                        return new Int16Array(value[\"value\"]);\n                    case \"Uint16Array\":\n                        return new Uint16Array(value[\"value\"]);\n                    case \"Int32Array\":\n                        return new Int32Array(value[\"value\"]);\n                    case \"Uint32Array\":\n                        return new Uint32Array(value[\"value\"]);\n                    case \"Float32Array\":\n                        return new Float32Array(value[\"value\"]);\n                    case \"Float64Array\":\n                        return new Float64Array(value[\"value\"]);\n                    case \"Undefined\":\n                        return undefined;\n                    case \"Number\": {\n                        switch (value[\"value\"]) {\n                            case \"+Infinity\":\n                                return Number.POSITIVE_INFINITY;\n                            case \"-Infinity\":\n                                return Number.NEGATIVE_INFINITY;\n                            case \"NaN\":\n                                return Number.NaN;\n                            default:\n                                return value;\n                        }\n                    }\n                    case \"Map\":\n                        return new Map(value[\"value\"]);\n                    case \"Set\":\n                        return new Set(value[\"value\"]);\n                }\n            }\n        }\n    } catch {}\n    return value;\n}\n\nexport function deserializeUint8Array<T = any>(data: Uint8Array): T {\n    const decoder = new TextDecoder();\n    return JSON.parse(decoder.decode(data), reviver);\n}\n\nexport function deserialize<T = any>(data: string): T {\n    return JSON.parse(data, reviver);\n}\n\nexport function serializeFunctionArgs(name: string, args: any[], validate: boolean) {\n    try {\n        return serialize(args, validate);\n    } catch (err: any) {\n        const error = new FaastError(\n            { cause: err, name: FaastErrorNames.ESERIALIZE },\n            `faast: Detected '${name}' argument cannot be serialized by JSON.stringify`\n        );\n        throw error;\n    }\n}\n\nexport function serializeReturnValue(name: string, returned: any, validate: boolean) {\n    try {\n        return serialize(returned, validate);\n    } catch (err: any) {\n        const error = new FaastError(\n            { cause: err, name: FaastErrorNames.ESERIALIZE },\n            `faast: Detected return value from ${name} cannot be serialized by JSON.stringify: ${inspect(\n                returned\n            )}`\n        );\n        throw error;\n    }\n}\n"]}