uniapp对接百度云营业执照识别记录
1、在根目录api文件夹下新建baidu.js
/*获取百度云凭证*/ export async function getToken() { return new Promise((resolve, reject) => { uni.request({ url: "https://aip.baidubce.com/oauth/2.0/token", method: "POST", header: { 'content-type': "application/x-www-form-urlencoded" }, dataType: 'json', data: { grant_type: "client_credentials",//必须参数，固定为`client_credentials` client_id: "API Key",//应用的`API Key` client_secret: "Secret Key"//必须参数，应用的`Secret Key` }, success(res) { resolve(res.data) }, fail(err) { reject(err) } }) }) } /*百度云营业执照识别*/ export async function business_license(access_token, url) { return new Promise((resolve, reject) => { uni.request({ url: "https://aip.baidubce.com/rest/2.0/ocr/v1/business_license", method: "POST", header: { 'content-type': "application/x-www-form-urlencoded" }, dataType: 'json', data: { access_token, url //image-base64格式,url-网络链接格式 }, success(res) { resolve(res.data) }, fail(err) { reject(err) } }) }) } 复制代码2、使用
引入
import {getToken,business_license,} from "@/api/baidu.js"; 复制代码2.1、base64上传方式
上传方式分为两种，一种是base64的格式上传，而另一种是以url的格式上传，具体看百度文档。要是用base64的上传方式必须将图片转为base64。所以这里使用插件市场的image-tools，以下是它的源码。但是我在使用过程中app的效果并不是很理想。有时候转成功，有时候不成功，有谁知道为啥吗？源码采用H5+的api方式来转码，我试着看H5+的文档找去原因，但结果分析不出来。为了不浪费时间，所以我是采用url格式上传去识别。
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')) }) } 复制代码2.2 url格式上传
我这里是使用七牛云的直传，先使用postman获取token，当然正常来话是不会这样做的啦，这个后端返回就行了。然后前端拿token去上传。另外的上传界面和上传的进度，自己实现就好了。
data() { return { access_token: '', qinuiToken: '' } } 复制代码 get_token() { getToken().then(res => { this.access_token = res.access_token }) }, update() { uni.chooseImage({ count: 1, success: (res) => { var file = res.tempFilePaths; uni.uploadFile({ url: 'https://up-z2.qiniup.com',//上传地址，详情看下面说明 filePath: file[0], name: 'file', formData: { 'key': new Date().getTime(), 'token': this.qinuiToken }, success: (res) => { let data = JSON.parse(res.data) //外链加上kdy就是完整的url了 let url = "http://域名.com/" + data.key business_license(this.access_token, url).then(res => { console.log(res)//识别数据 }).catch(err => { uni.showToast({ title: "上传识别错误", icon: "icon" }) }) console.log(data, url) } }); }, fail(err) { console.log(err) reject(err) } }) }, 复制代码地址说明
case 'NCN': uploadURL = 'https://up-z1.qiniup.com'; break; case 'SCN': uploadURL = 'https://up-z2.qiniup.com'; break; case 'NA': uploadURL = 'https://up-na0.qiniup.com'; break; case 'ASG': uploadURL = 'https://up-as0.qiniup.com'; break; //qiniu.region.z0: 代表华东区域 //qiniu.region.z1: 代表华北区域 //qiniu.region.z2: 代表华南区域 //qiniu.region.na0: 代表北美区域 //qiniu.region.as0: 代表东南亚区域
作者：十一_要努力
链接：https://juejin.cn/post/7034796994480570398