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| 1 | +'use strict' |
| 2 | + |
| 3 | +const { TimeoutError, AbortError } = require('./error') |
| 4 | +const { Response, Request, Headers, fetch } = require('../fetch') |
| 5 | + |
| 6 | +/** |
| 7 | + * @typedef {import('../types').FetchOptions} FetchOptions |
| 8 | + * @typedef {import('../types').ProgressFn} ProgressFn |
| 9 | + */ |
| 10 | + |
| 11 | +/** |
| 12 | + * Fetch with progress |
| 13 | + * |
| 14 | + * @param {string | Request} url |
| 15 | + * @param {FetchOptions} [options] |
| 16 | + * @returns {Promise<ResponseWithURL>} |
| 17 | + */ |
| 18 | +const fetchWithProgress = (url, options = {}) => { |
| 19 | + const request = new XMLHttpRequest() |
| 20 | + request.open(options.method || 'GET', url.toString(), true) |
| 21 | + |
| 22 | + const { timeout, headers } = options |
| 23 | + |
| 24 | + if (timeout && timeout > 0 && timeout < Infinity) { |
| 25 | + request.timeout = timeout |
| 26 | + } |
| 27 | + |
| 28 | + if (options.overrideMimeType != null) { |
| 29 | + request.overrideMimeType(options.overrideMimeType) |
| 30 | + } |
| 31 | + |
| 32 | + if (headers) { |
| 33 | + for (const [name, value] of new Headers(headers)) { |
| 34 | + request.setRequestHeader(name, value) |
| 35 | + } |
| 36 | + } |
| 37 | + |
| 38 | + if (options.signal) { |
| 39 | + options.signal.onabort = () => request.abort() |
| 40 | + } |
| 41 | + |
| 42 | + if (options.onUploadProgress) { |
| 43 | + request.upload.onprogress = options.onUploadProgress |
| 44 | + } |
| 45 | + |
| 46 | + request.responseType = 'blob' |
| 47 | + |
| 48 | + return new Promise((resolve, reject) => { |
| 49 | + /** |
| 50 | + * @param {Event} event |
| 51 | + */ |
| 52 | + const handleEvent = (event) => { |
| 53 | + switch (event.type) { |
| 54 | + case 'error': { |
| 55 | + resolve(Response.error()) |
| 56 | + break |
| 57 | + } |
| 58 | + case 'load': { |
| 59 | + resolve( |
| 60 | + new ResponseWithURL(request.responseURL, request.response, { |
| 61 | + status: request.status, |
| 62 | + statusText: request.statusText, |
| 63 | + headers: parseHeaders(request.getAllResponseHeaders()) |
| 64 | + }) |
| 65 | + ) |
| 66 | + break |
| 67 | + } |
| 68 | + case 'timeout': { |
| 69 | + reject(new TimeoutError()) |
| 70 | + break |
| 71 | + } |
| 72 | + case 'abort': { |
| 73 | + reject(new AbortError()) |
| 74 | + break |
| 75 | + } |
| 76 | + default: { |
| 77 | + break |
| 78 | + } |
| 79 | + } |
| 80 | + } |
| 81 | + request.onerror = handleEvent |
| 82 | + request.onload = handleEvent |
| 83 | + request.ontimeout = handleEvent |
| 84 | + request.onabort = handleEvent |
| 85 | + |
| 86 | + request.send(/** @type {BodyInit} */(options.body)) |
| 87 | + }) |
| 88 | +} |
| 89 | + |
| 90 | +const fetchWithStreaming = fetch |
| 91 | + |
| 92 | +/** |
| 93 | + * @param {string | Request} url |
| 94 | + * @param {FetchOptions} options |
| 95 | + */ |
| 96 | +const fetchWith = (url, options = {}) => |
| 97 | + (options.onUploadProgress != null) |
| 98 | + ? fetchWithProgress(url, options) |
| 99 | + : fetchWithStreaming(url, options) |
| 100 | + |
| 101 | +/** |
| 102 | + * Parse Headers from a XMLHttpRequest |
| 103 | + * |
| 104 | + * @param {string} input |
| 105 | + * @returns {Headers} |
| 106 | + */ |
| 107 | +const parseHeaders = (input) => { |
| 108 | + const headers = new Headers() |
| 109 | + for (const line of input.trim().split(/[\r\n]+/)) { |
| 110 | + const index = line.indexOf(': ') |
| 111 | + if (index > 0) { |
| 112 | + headers.set(line.slice(0, index), line.slice(index + 1)) |
| 113 | + } |
| 114 | + } |
| 115 | + |
| 116 | + return headers |
| 117 | +} |
| 118 | + |
| 119 | +class ResponseWithURL extends Response { |
| 120 | + /** |
| 121 | + * @param {string} url |
| 122 | + * @param {BodyInit} body |
| 123 | + * @param {ResponseInit} options |
| 124 | + */ |
| 125 | + constructor (url, body, options) { |
| 126 | + super(body, options) |
| 127 | + Object.defineProperty(this, 'url', { value: url }) |
| 128 | + } |
| 129 | +} |
| 130 | + |
| 131 | +module.exports = { |
| 132 | + fetch: fetchWith, |
| 133 | + Request, |
| 134 | + Headers, |
| 135 | + ResponseWithURL |
| 136 | +} |
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