function getLocalFilePath(path) {
|
if (path.indexOf('_www') === 0 || path.indexOf('_doc') === 0 || path.indexOf('_documents') === 0 || path.indexOf('_downloads') === 0) {
|
return path
|
}
|
if (path.indexOf('file://') === 0) {
|
return path
|
}
|
if (path.indexOf('/storage/emulated/0/') === 0) {
|
return path
|
}
|
if (path.indexOf('/') === 0) {
|
var localFilePath = plus.io.convertAbsoluteFileSystem(path)
|
if (localFilePath !== path) {
|
return localFilePath
|
} else {
|
path = path.substr(1)
|
}
|
}
|
return '_www/' + path
|
}
|
|
export function pathToBase64(path) {
|
return new Promise(function(resolve, reject) {
|
if (typeof window === 'object' && 'document' in window) {
|
if (typeof FileReader === 'function') {
|
var xhr = new XMLHttpRequest()
|
xhr.open('GET', path, true)
|
xhr.responseType = 'blob'
|
xhr.onload = function() {
|
if (this.status === 200) {
|
let fileReader = new FileReader()
|
fileReader.onload = function(e) {
|
resolve(e.target.result)
|
}
|
fileReader.onerror = reject
|
fileReader.readAsDataURL(this.response)
|
}
|
}
|
xhr.onerror = reject
|
xhr.send()
|
return
|
}
|
var canvas = document.createElement('canvas')
|
var c2x = canvas.getContext('2d')
|
var img = new Image
|
img.onload = function() {
|
canvas.width = img.width
|
canvas.height = img.height
|
c2x.drawImage(img, 0, 0)
|
resolve(canvas.toDataURL())
|
canvas.height = canvas.width = 0
|
}
|
img.onerror = reject
|
img.src = path
|
return
|
}
|
if (typeof plus === 'object') {
|
plus.io.resolveLocalFileSystemURL(getLocalFilePath(path), function(entry) {
|
entry.file(function(file) {
|
var fileReader = new plus.io.FileReader()
|
fileReader.onload = function(data) {
|
resolve(data.target.result)
|
}
|
fileReader.onerror = function(error) {
|
reject(error)
|
}
|
fileReader.readAsDataURL(file)
|
}, function(error) {
|
reject(error)
|
})
|
}, function(error) {
|
reject(error)
|
})
|
return
|
}
|
if (typeof wx === 'object' && wx.canIUse('getFileSystemManager')) {
|
wx.getFileSystemManager().readFile({
|
filePath: path,
|
encoding: 'base64',
|
success: function(res) {
|
resolve('data:image/png;base64,' + res.data)
|
},
|
fail: function(error) {
|
reject(error)
|
}
|
})
|
return
|
}
|
reject(new Error('not support'))
|
})
|
}
|
|
export function base64ToPath(base64, extName) {
|
return new Promise(function(resolve, reject) {
|
if (typeof window === 'object' && 'document' in window) {
|
base64 = base64.split(',')
|
var type = base64[0].match(/:(.*?);/)[1]
|
var str = atob(base64[1])
|
var n = str.length
|
var array = new Uint8Array(n)
|
while (n--) {
|
array[n] = str.charCodeAt(n)
|
}
|
return resolve((window.URL || window.webkitURL).createObjectURL(new Blob([array], { type: type })))
|
}
|
var fileName;
|
if (!extName) {
|
extName = base64.match(/data\:\S+\/(\S+);/)
|
if (extName) {
|
extName = extName[1]
|
} else {
|
reject(new Error('base64 error'))
|
}
|
fileName = Date.now() + '.' + extName;
|
} else {
|
fileName = Date.now() + extName;
|
}
|
if (typeof plus === 'object') {
|
var bitmap = new plus.nativeObj.Bitmap('bitmap' + Date.now())
|
bitmap.loadBase64Data(base64, function() {
|
var filePath = '_doc/uniapp_temp/' + fileName
|
bitmap.save(filePath, {}, function() {
|
bitmap.clear()
|
resolve(filePath)
|
}, function(error) {
|
bitmap.clear()
|
reject(error)
|
})
|
}, function(error) {
|
bitmap.clear()
|
reject(error)
|
})
|
return
|
}
|
if (typeof wx === 'object' && wx.canIUse('getFileSystemManager')) {
|
var filePath = wx.env.USER_DATA_PATH + '/' + fileName
|
wx.getFileSystemManager().writeFile({
|
filePath: filePath,
|
data: base64.replace(/^data:\S+\/\S+;base64,/, ''),
|
encoding: 'base64',
|
success: function() {
|
resolve(filePath)
|
},
|
fail: function(error) {
|
reject(error)
|
}
|
})
|
return
|
}
|
reject(new Error('not support'))
|
})
|
}
|
