@tensorflow/tfjs-core
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Hardware-accelerated JavaScript library for machine intelligence
247 lines • 12.9 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var util_1 = require("../util");
var io_utils_1 = require("./io_utils");
var router_registry_1 = require("./router_registry");
var weights_loader_1 = require("./weights_loader");
var BrowserHTTPRequest = (function () {
function BrowserHTTPRequest(path, requestInit) {
this.DEFAULT_METHOD = 'POST';
if (typeof fetch === 'undefined') {
throw new Error('browserHTTPRequest is not supported outside the web browser without a fetch polyfill.');
}
util_1.assert(path != null && path.length > 0, 'URL path for browserHTTPRequest must not be null, undefined or ' +
'empty.');
if (Array.isArray(path)) {
util_1.assert(path.length === 2, 'URL paths for browserHTTPRequest must have a length of 2, ' +
("(actual length is " + path.length + ")."));
}
this.path = path;
if (requestInit != null && requestInit.body != null) {
throw new Error('requestInit is expected to have no pre-existing body, but has one.');
}
this.requestInit = requestInit || {};
}
BrowserHTTPRequest.prototype.save = function (modelArtifacts) {
return __awaiter(this, void 0, void 0, function () {
var init, weightsManifest, modelTopologyAndWeightManifest, response;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (modelArtifacts.modelTopology instanceof ArrayBuffer) {
throw new Error('BrowserHTTPRequest.save() does not support saving model topology ' +
'in binary formats yet.');
}
init = Object.assign({ method: this.DEFAULT_METHOD }, this.requestInit);
init.body = new FormData();
weightsManifest = [{
paths: ['./model.weights.bin'],
weights: modelArtifacts.weightSpecs,
}];
modelTopologyAndWeightManifest = {
modelTopology: modelArtifacts.modelTopology,
weightsManifest: weightsManifest
};
init.body.append('model.json', new Blob([JSON.stringify(modelTopologyAndWeightManifest)], { type: 'application/json' }), 'model.json');
if (modelArtifacts.weightData != null) {
init.body.append('model.weights.bin', new Blob([modelArtifacts.weightData], { type: 'application/octet-stream' }), 'model.weights.bin');
}
return [4, fetch(this.path, init)];
case 1:
response = _a.sent();
if (response.status === 200) {
return [2, {
modelArtifactsInfo: io_utils_1.getModelArtifactsInfoForJSON(modelArtifacts),
responses: [response],
}];
}
else {
throw new Error("BrowserHTTPRequest.save() failed due to HTTP response status " +
(response.status + "."));
}
return [2];
}
});
});
};
BrowserHTTPRequest.prototype.load = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2, Array.isArray(this.path) ? this.loadBinaryModel() :
this.loadJSONModel()];
});
});
};
BrowserHTTPRequest.prototype.loadBinaryTopology = function () {
return __awaiter(this, void 0, void 0, function () {
var response, error_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 3, , 4]);
return [4, fetch(this.path[0], this.requestInit)];
case 1:
response = _a.sent();
return [4, response.arrayBuffer()];
case 2: return [2, _a.sent()];
case 3:
error_1 = _a.sent();
throw new Error(this.path[0] + " not found. " + error_1);
case 4: return [2];
}
});
});
};
BrowserHTTPRequest.prototype.loadBinaryModel = function () {
return __awaiter(this, void 0, void 0, function () {
var _a, graphPromise, manifestPromise, _b, modelTopology, weightsManifestResponse, weightsManifest, weightSpecs, weightData;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
graphPromise = this.loadBinaryTopology();
return [4, fetch(this.path[1], this.requestInit)];
case 1:
manifestPromise = _c.sent();
return [4, Promise.all([graphPromise, manifestPromise])];
case 2:
_b = _c.sent(), modelTopology = _b[0], weightsManifestResponse = _b[1];
return [4, weightsManifestResponse.json()];
case 3:
weightsManifest = _c.sent();
if (!(weightsManifest != null)) return [3, 5];
return [4, this.loadWeights(weightsManifest)];
case 4:
_a = _c.sent(), weightSpecs = _a[0], weightData = _a[1];
_c.label = 5;
case 5: return [2, { modelTopology: modelTopology, weightSpecs: weightSpecs, weightData: weightData }];
}
});
});
};
BrowserHTTPRequest.prototype.loadJSONModel = function () {
return __awaiter(this, void 0, void 0, function () {
var _a, modelConfigRequest, modelConfig, modelTopology, weightsManifest, weightSpecs, weightData, weightsManifest_1;
return __generator(this, function (_b) {
switch (_b.label) {
case 0: return [4, fetch(this.path, this.requestInit)];
case 1:
modelConfigRequest = _b.sent();
return [4, modelConfigRequest.json()];
case 2:
modelConfig = _b.sent();
modelTopology = modelConfig['modelTopology'];
weightsManifest = modelConfig['weightsManifest'];
if (modelTopology == null && weightsManifest == null) {
throw new Error("The JSON from HTTP path " + this.path + " contains neither model " +
"topology or manifest for weights.");
}
if (!(weightsManifest != null)) return [3, 4];
weightsManifest_1 = modelConfig['weightsManifest'];
return [4, this.loadWeights(weightsManifest_1)];
case 3:
_a = _b.sent(), weightSpecs = _a[0], weightData = _a[1];
_b.label = 4;
case 4: return [2, { modelTopology: modelTopology, weightSpecs: weightSpecs, weightData: weightData }];
}
});
});
};
BrowserHTTPRequest.prototype.loadWeights = function (weightsManifest) {
return __awaiter(this, void 0, void 0, function () {
var weightPath, weightSpecs, _i, weightsManifest_2, entry, pathPrefix, fetchURLs, _a, _b;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
weightPath = Array.isArray(this.path) ? this.path[1] : this.path;
weightSpecs = [];
for (_i = 0, weightsManifest_2 = weightsManifest; _i < weightsManifest_2.length; _i++) {
entry = weightsManifest_2[_i];
weightSpecs.push.apply(weightSpecs, entry.weights);
}
pathPrefix = weightPath.substring(0, weightPath.lastIndexOf('/'));
if (!pathPrefix.endsWith('/')) {
pathPrefix = pathPrefix + '/';
}
fetchURLs = [];
weightsManifest.forEach(function (weightsGroup) {
weightsGroup.paths.forEach(function (path) {
fetchURLs.push(pathPrefix + path);
});
});
_a = [weightSpecs];
_b = io_utils_1.concatenateArrayBuffers;
return [4, weights_loader_1.loadWeightsAsArrayBuffer(fetchURLs, this.requestInit)];
case 1: return [2, _a.concat([
_b.apply(void 0, [_c.sent()])
])];
}
});
});
};
BrowserHTTPRequest.URL_SCHEME_REGEX = /^https?:\/\//;
return BrowserHTTPRequest;
}());
exports.BrowserHTTPRequest = BrowserHTTPRequest;
function isHTTPScheme(url) {
return url.match(BrowserHTTPRequest.URL_SCHEME_REGEX) != null;
}
exports.httpRequestRouter = function (url) {
if (typeof fetch === 'undefined') {
return null;
}
else {
var isHTTP = true;
if (Array.isArray(url)) {
isHTTP = url.every(function (urlItem) { return isHTTPScheme(urlItem); });
}
else {
isHTTP = isHTTPScheme(url);
}
if (isHTTP) {
return browserHTTPRequest(url);
}
}
return null;
};
router_registry_1.IORouterRegistry.registerSaveRouter(exports.httpRequestRouter);
router_registry_1.IORouterRegistry.registerLoadRouter(exports.httpRequestRouter);
function browserHTTPRequest(path, requestInit) {
return new BrowserHTTPRequest(path, requestInit);
}
exports.browserHTTPRequest = browserHTTPRequest;
//# sourceMappingURL=browser_http.js.map