@azure/storage-blob
Version:
Microsoft Azure Storage SDK for JavaScript - Blob
134 lines • 4.6 kB
JavaScript
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
import { delay } from "@azure/core-util";
import { Poller } from "@azure/core-lro";
/**
* This is the poller returned by {@link BlobClient.beginCopyFromURL}.
* This can not be instantiated directly outside of this package.
*
* @hidden
*/
export class BlobBeginCopyFromUrlPoller extends Poller {
intervalInMs;
constructor(options) {
const { blobClient, copySource, intervalInMs = 15000, onProgress, resumeFrom, startCopyFromURLOptions, } = options;
let state;
if (resumeFrom) {
state = JSON.parse(resumeFrom).state;
}
const operation = makeBlobBeginCopyFromURLPollOperation({
...state,
blobClient,
copySource,
startCopyFromURLOptions,
});
super(operation);
if (typeof onProgress === "function") {
this.onProgress(onProgress);
}
this.intervalInMs = intervalInMs;
}
delay() {
return delay(this.intervalInMs);
}
}
/**
* Note: Intentionally using function expression over arrow function expression
* so that the function can be invoked with a different context.
* This affects what `this` refers to.
* @hidden
*/
const cancel = async function cancel(options = {}) {
const state = this.state;
const { copyId } = state;
if (state.isCompleted) {
return makeBlobBeginCopyFromURLPollOperation(state);
}
if (!copyId) {
state.isCancelled = true;
return makeBlobBeginCopyFromURLPollOperation(state);
}
// if abortCopyFromURL throws, it will bubble up to user's poller.cancelOperation call
await state.blobClient.abortCopyFromURL(copyId, {
abortSignal: options.abortSignal,
});
state.isCancelled = true;
return makeBlobBeginCopyFromURLPollOperation(state);
};
/**
* Note: Intentionally using function expression over arrow function expression
* so that the function can be invoked with a different context.
* This affects what `this` refers to.
* @hidden
*/
const update = async function update(options = {}) {
const state = this.state;
const { blobClient, copySource, startCopyFromURLOptions } = state;
if (!state.isStarted) {
state.isStarted = true;
const result = await blobClient.startCopyFromURL(copySource, startCopyFromURLOptions);
// copyId is needed to abort
state.copyId = result.copyId;
if (result.copyStatus === "success") {
state.result = result;
state.isCompleted = true;
}
}
else if (!state.isCompleted) {
try {
const result = await state.blobClient.getProperties({ abortSignal: options.abortSignal });
const { copyStatus, copyProgress } = result;
const prevCopyProgress = state.copyProgress;
if (copyProgress) {
state.copyProgress = copyProgress;
}
if (copyStatus === "pending" &&
copyProgress !== prevCopyProgress &&
typeof options.fireProgress === "function") {
// trigger in setTimeout, or swallow error?
options.fireProgress(state);
}
else if (copyStatus === "success") {
state.result = result;
state.isCompleted = true;
}
else if (copyStatus === "failed") {
state.error = new Error(`Blob copy failed with reason: "${result.copyStatusDescription || "unknown"}"`);
state.isCompleted = true;
}
}
catch (err) {
state.error = err;
state.isCompleted = true;
}
}
return makeBlobBeginCopyFromURLPollOperation(state);
};
/**
* Note: Intentionally using function expression over arrow function expression
* so that the function can be invoked with a different context.
* This affects what `this` refers to.
* @hidden
*/
const toString = function toString() {
return JSON.stringify({ state: this.state }, (key, value) => {
// remove blobClient from serialized state since a client can't be hydrated from this info.
if (key === "blobClient") {
return undefined;
}
return value;
});
};
/**
* Creates a poll operation given the provided state.
* @hidden
*/
function makeBlobBeginCopyFromURLPollOperation(state) {
return {
state: { ...state },
cancel,
toString,
update,
};
}
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