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/proc/2/root/var/runtime/node_modules/@aws-sdk/node_modules/axios/lib/helpers

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fromDataURI.js1.9 KB · 69 lines
'use strict'; import AxiosError from '../core/AxiosError.js';import parseProtocol from './parseProtocol.js';import platform from '../platform/index.js'; // RFC 2397: data:[<mediatype>][;base64],<data>// mediatype = type/subtype followed by optional ;name=value parametersconst DATA_URL_PATTERN = /^([^,;]+\/[^,;]+)?((?:;[^,;=]+=[^,;]+)*)(;base64)?,([\s\S]*)$/; /** * Parse data uri to a Buffer or Blob * * @param {String} uri * @param {?Boolean} asBlob * @param {?Object} options * @param {?Function} options.Blob * * @returns {Buffer|Blob} */export default function fromDataURI(uri, asBlob, options) {  const _Blob = (options && options.Blob) || platform.classes.Blob;  const protocol = parseProtocol(uri);   if (asBlob === undefined && _Blob) {    asBlob = true;  }   if (protocol === 'data') {    uri = protocol.length ? uri.slice(protocol.length + 1) : uri;     const match = DATA_URL_PATTERN.exec(uri);     if (!match) {      throw new AxiosError('Invalid URL', AxiosError.ERR_INVALID_URL);    }     const type = match[1];    const params = match[2];    const encoding = match[3] ? 'base64' : 'utf8';    const body = match[4];     // RFC 2397 section 3: default mediatype is text/plain;charset=US-ASCII    // Bare `data:,` leaves mime undefined; Blob normalises that to "" per spec.    let mime = '';    if (type) {      mime = params ? type + params : type;    } else if (params) {      mime = 'text/plain' + params;    }     const buffer = encoding === 'base64'      ? Buffer.from(body, 'base64')      : Buffer.from(decodeURIComponent(body), encoding);     if (asBlob) {      if (!_Blob) {        throw new AxiosError('Blob is not supported', AxiosError.ERR_NOT_SUPPORT);      }       return new _Blob([buffer], { type: mime });    }     return buffer;  }   throw new AxiosError('Unsupported protocol ' + protocol, AxiosError.ERR_NOT_SUPPORT);}