https://ivaprime.com/static/js/libraries/FileSaver.js

1/*
2* FileSaver.js
3* A saveAs() FileSaver implementation.
4*
5* By Eli Grey, http://eligrey.com
6*
7* License : https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md (MIT)
8* source  : http://purl.eligrey.com/github/FileSaver.js
9*/
10
11// The one and only way of getting global scope in all environments
12// https://stackoverflow.com/q/3277182/1008999
13var _global = typeof window === 'object' && window.window === window
14  ? window : typeof self === 'object' && self.self === self
15  ? self : typeof global === 'object' && global.global === global
16  ? global
17  : this
18
19function bom (blob, opts) {
20  if (typeof opts === 'undefined') opts = { autoBom: false }
21  else if (typeof opts !== 'object') {
22    console.warn('Deprecated: Expected third argument to be a object')
23    opts = { autoBom: !opts }
24  }
25
26  // prepend BOM for UTF-8 XML and text/* types (including HTML)
27  // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF
28  if (opts.autoBom && /^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
29    return new Blob([String.fromCharCode(0xFEFF), blob], { type: blob.type })
30  }
31  return blob
32}
33
34function download (url, name, opts) {
35  var xhr = new XMLHttpRequest()
36  xhr.open('GET', url)
37  xhr.responseType = 'blob'
38  xhr.onload = function () {
39    saveAs(xhr.response, name, opts)
40  }
41  xhr.onerror = function () {
42    console.error('could not download file')
43  }
44  xhr.send()
45}
46
47function corsEnabled (url) {
48  var xhr = new XMLHttpRequest()
49  // use sync to avoid popup blocker
50  xhr.open('HEAD', url, false)
51  try {
52    xhr.send()
53  } catch (e) {}
54  return xhr.status >= 200 && xhr.status <= 299
55}
56
57// `a.click()` doesn't work for all browsers (#465)
58function click (node) {
59  try {
60    node.dispatchEvent(new MouseEvent('click'))
61  } catch (e) {
62    var evt = document.createEvent('MouseEvents')
63    evt.initMouseEvent('click', true, true, window, 0, 0, 0, 80,
64                          20, false, false, false, false, 0, null)
65    node.dispatchEvent(evt)
66  }
67}
68
69// Detect WebView inside a native macOS app by ruling out all browsers
70// We just need to check for 'Safari' because all other browsers (besides Firefox) include that too
71// https://www.whatismybrowser.com/guides/the-latest-user-agent/macos
72var isMacOSWebView = _global.navigator && /Macintosh/.test(navigator.userAgent) && /AppleWebKit/.test(navigator.userAgent) && !/Safari/.test(navigator.userAgent)
73
74var saveAs = _global.saveAs || (
75  // probably in some web worker
76  (typeof window !== 'object' || window !== _global)
77    ? function saveAs () { /* noop */ }
78
79  // Use download attribute first if possible (#193 Lumia mobile) unless this is a macOS WebView
80  : ('download' in HTMLAnchorElement.prototype && !isMacOSWebView)
81  ? function saveAs (blob, name, opts) {
82    var URL = _global.URL || _global.webkitURL
83    // Namespace is used to prevent conflict w/ Chrome Poper Blocker extension (Issue #561)
84    var a = document.createElementNS('http://www.w3.org/1999/xhtml', 'a')
85    name = name || blob.name || 'download'
86

87    a.download = name
88    a.rel = 'noopener' // tabnabbing
89
90    // TODO: detect chrome extensions & packaged apps
91    // a.target = '_blank'
92
93    if (typeof blob === 'string') {
94      // Support regular links
95      a.href = blob
96      if (a.origin !== location.origin) {
97        corsEnabled(a.href)
98          ? download(blob, name, opts)
99          : click(a, a.target = '_blank')
100      } else {
101        click(a)
102      }
103    } else {
104      // Support blobs
105      a.href = URL.createObjectURL(blob)
106      setTimeout(function () { URL.revokeObjectURL(a.href) }, 4E4) // 40s
107      setTimeout(function () { click(a) }, 0)
108    }
109  }
110
111  // Use msSaveOrOpenBlob as a second approach
112  : 'msSaveOrOpenBlob' in navigator
113  ? function saveAs (blob, name, opts) {
114    name = name || blob.name || 'download'
115
116    if (typeof blob === 'string') {
117      if (corsEnabled(blob)) {
118        download(blob, name, opts)
119      } else {
120        var a = document.createElement('a')
121        a.href = blob
122        a.target = '_blank'
123        setTimeout(function () { click(a) })
124      }
125    } else {
126      navigator.msSaveOrOpenBlob(bom(blob, opts), name)
127    }
128  }
129
130  // Fallback to using FileReader and a popup
131  : function saveAs (blob, name, opts, popup) {
132    // Open a popup immediately do go around popup blocker
133    // Mostly only available on user interaction and the fileReader is async so...
134    popup = popup || open('', '_blank')
135    if (popup) {
136      popup.document.title =
137      popup.document.body.innerText = 'downloading...'
138    }
139
140    if (typeof blob === 'string') return download(blob, name, opts)
141
142    var force = blob.type === 'application/octet-stream'
143    var isSafari = /constructor/i.test(_global.HTMLElement) || _global.safari
144    var isChromeIOS = /CriOS\/[\d]+/.test(navigator.userAgent)
145
146    if ((isChromeIOS || (force && isSafari) || isMacOSWebView) && typeof FileReader !== 'undefined') {
147      // Safari doesn't allow downloading of blob URLs
148      var reader = new FileReader()
149      reader.onloadend = function () {
150        var url = reader.result
151        url = isChromeIOS ? url : url.replace(/^data:[^;]*;/, 'data:attachment/file;')
152        if (popup) popup.location.href = url
153        else location = url
154        popup = null // reverse-tabnabbing #460
155      }
156      reader.readAsDataURL(blob)
157    } else {
158      var URL = _global.URL || _global.webkitURL
159      var url = URL.createObjectURL(blob)
160      if (popup) popup.location = url
161      else location.href = url
162      popup = null // reverse-tabnabbing #460
163      setTimeout(function () { URL.revokeObjectURL(url) }, 4E4) // 40s
164    }
165  }
166)
167
168_global.saveAs = saveAs.saveAs = saveAs
169
170if (typeof module !== 'undefined') {
171  module.exports = saveAs;
172}