@tarojs/taro-h5/dist/api/network/utils.js

Taro h5 framework

/**
 * HTTP Response Header 事件回调函数的参数
 * @typedef {Object} HeadersReceivedParam
 * @property {Object} header 开发者服务器返回的 HTTP Response Header
 */
/**
 * HTTP Response Header 事件的回调函数
 * @callback HeadersReceivedCallback
 * @param {HeadersReceivedParam} res 参数
 */
/**
 * 进度变化回调函数的参数
 * @typedef {Object} ProgressUpdateParam
 * @property {number} progress 进度百分比
 * @property {number} [totalBytesWritten] 已经下载的数据长度，单位 Bytes
 * @property {number} [totalBytesSent] 已经上传的数据长度，单位 Bytes
 * @property {number} [totalBytesExpectedToWrite] 预期需要下载的数据总长度，单位 Bytes
 * @property {number} [totalBytesExpectedToSend] 预期需要上传的数据总长度，单位 Bytes
 */
/**
 * 进度变化事件的回调函数
 * @callback ProgressUpdateCallback
 * @param {ProgressUpdateParam} res 参数
 */
const NETWORK_TIMEOUT = 60000;
const XHR_STATS = {
    UNSENT: 0, // Client has been created. open() not called yet.
    OPENED: 1, // open() has been called.
    HEADERS_RECEIVED: 2, // send() has been called, and headers and status are available.
    LOADING: 3, // Downloading; responseText holds partial data.
    DONE: 4 // The operation is complete.
};
/**
 * 设置xhr的header
 * @param {XMLHttpRequest} xhr
 * @param {Object} header
 */
const setHeader = (xhr, header) => {
    let headerKey;
    for (headerKey in header) {
        xhr.setRequestHeader(headerKey, header[headerKey]);
    }
};
/**
 * 将 blob url 转化为文件
 * @param {string} url 要转换的 blob url
 * @returns {Promise<File>}
 */
const convertObjectUrlToBlob = url => {
    return new Promise((resolve, reject) => {
        const xhr = new XMLHttpRequest();
        xhr.open('GET', url, true);
        xhr.responseType = 'blob';
        xhr.withCredentials = true;
        xhr.onload = function () {
            if (this.status === 200) {
                resolve(this.response);
            }
            else {
                /* eslint-disable prefer-promise-reject-errors */
                reject({ status: this.status });
            }
        };
        xhr.send();
    });
};

export { NETWORK_TIMEOUT, XHR_STATS, convertObjectUrlToBlob, setHeader };
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