上传代码

distribution/js_sdk/mmmm-image-tools/index.js

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+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
+}
+
+function dataUrlToBase64(str) {
+    var array = str.split(',')
+    return array[array.length - 1]
+}
+
+var index = 0
+function getNewFileId() {
+    return Date.now() + String(index++)
+}
+
+function biggerThan(v1, v2) {
+    var v1Array = v1.split('.')
+    var v2Array = v2.split('.')
+    var update = false
+    for (var index = 0; index < v2Array.length; index++) {
+        var diff = v1Array[index] - v2Array[index]
+        if (diff !== 0) {
+            update = diff > 0
+            break
+        }
+    }
+    return update
+}
+
+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) {
+    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 extName = base64.split(',')[0].match(/data\:\S+\/(\S+);/)
+        if (extName) {
+            extName = extName[1]
+        } else {
+            reject(new Error('base64 error'))
+        }
+        var fileName = getNewFileId() + '.' + extName
+        if (typeof plus === 'object') {
+            var basePath = '_doc'
+            var dirPath = 'uniapp_temp'
+            var filePath = basePath + '/' + dirPath + '/' + fileName
+            if (!biggerThan(plus.os.name === 'Android' ? '1.9.9.80627' : '1.9.9.80472', plus.runtime.innerVersion)) {
+                plus.io.resolveLocalFileSystemURL(basePath, function(entry) {
+                    entry.getDirectory(dirPath, {
+                        create: true,
+                        exclusive: false,
+                    }, function(entry) {
+                        entry.getFile(fileName, {
+                            create: true,
+                            exclusive: false,
+                        }, function(entry) {
+                            entry.createWriter(function(writer) {
+                                writer.onwrite = function() {
+                                    resolve(filePath)
+                                }
+                                writer.onerror = reject
+                                writer.seek(0)
+                                writer.writeAsBinary(dataUrlToBase64(base64))
+                            }, reject)
+                        }, reject)
+                    }, reject)
+                }, reject)
+                return
+            }
+            var bitmap = new plus.nativeObj.Bitmap(fileName)
+            bitmap.loadBase64Data(base64, function() {
+                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: dataUrlToBase64(base64),
+                encoding: 'base64',
+                success: function() {
+                    resolve(filePath)
+                },
+                fail: function(error) {
+                    reject(error)
+                }
+            })
+            return
+        }
+        reject(new Error('not support'))
+    })
+}

distribution/js_sdk/mmmm-image-tools/package.json

@@ -0,0 +1,11 @@
+{
+    "id": "mmmm-image-tools",
+    "name": "image-tools",
+    "version": "1.4.0",
+    "description": "图像转换工具，可用于图像和base64的转换",
+    "keywords": [
+        "base64",
+        "保存",
+        "图像"
+    ]
+}