实现一个前后端结构的语音识别小程序服务
原创
一、实现方式：通过录音管理器 RecorderManager调用手机的录音功能实现音频的在线获取，并将获取到的音频传入到服务端，服务端调用腾讯云“一句话识别”API将音频中的文字提取出来回调到小程序端
二、实现流程
第一步：配置服务器域名
第二步：实现小程序的Demo
在小程序公共配置文件app.json中，添加页面生成参数
"pages/voice/voice",
点击"编译"生成页面目录及页面
- voice.wxml
<!--pages/voice/voice.wxml-->
<view class="REC">
<view class="time">{{status==0?'录音时长':(status==3?'录音结束':'录音中')}}：{{time}} 秒 ({{duration/1000}}秒)</view>
<view class="rin">
<view class="{{status==3 && actionStatus==0?'show':'hide'}}" bindtap="play" hover-class="skip">{{actionStatus==1?'播放中':'播放录音'}}</view>
<view class="{{status==3?'show':'hide'}}" bindtap="again" hover-class="skip">再次录制</view>
</view>
<view class="anniu">
<view class="{{status==0?'highlight':'gray'}}" bindtap="start" hover-class="skip">开始</view>
<view class="{{status==1?'highlight':'gray'}}" bindtap="stop" hover-class="skip">暂停</view>
<view class="{{status==2?'highlight':'gray'}}" bindtap="continue" hover-class="skip">继续</view>
<view class="{{(status==1 || status==2)?'highlight':'gray'}}" bindtap="shutoff" hover-class="skip">停止</view>
<view class="{{status==3?'highlight':'gray'}}" bindtap="recognition" hover-class="skip">识别</view>
</view>
<view class="progress">
<progress percent="{{time*(100/(duration/1000))}}" stroke-width="10" backgroundColor="#fff" border-radius="15" stroke-width="4" color="#7FFF00" active />
</view>
</view>
<view class=".REC">
<textarea placeholder="录音完成后点击识别可将音频转文字" auto-focus value="{{ Words }}" />
</view>使用的组件：
使用的视图容器：
使用的XML语法：
使用的视图层：
- voice.wxss
/* pages/voice/voice.wxss */
.REC {
border-radius: 25rpx;
background-color: rgb( 199,237,204 );
padding: 6rpx 0rpx;
margin: 15rpx 35rpx;
}
.rin {
justify-content: space-between;
align-items: center;
margin: 0rpx 120rpx;
display: flex;
}
.rin .show {
background-color: rgb(178, 228, 228);
padding: 15rpx;
width: 210rpx;
border: 5rpx solid rgb(127, 204, 214);
border-radius: 20rpx;
font-size: 28rpx;
display: flex;
justify-content: center;
align-items: center;
}
.rin .hide {
padding: 15rpx;
align-items: center;
border-radius: 20rpx;
display: flex;
width: 215rpx;
font-size: 28rpx;
justify-content: center;
border: 5rpx solid #eee;
pointer-events: none;
background-color: rgba(137, 190, 178, 0.445);
}
.time {
text-align: center;
line-height: 75rpx;
font-size: 28rpx;
}
.progress {
margin: 25rpx;
}
.play {
margin: 0rpx 25rpx;
}
.content {
line-height: 60rpx;
font-size: 28rpx;
display: flex;
justify-content: center;
}
.anniu {
display: flex;
margin: 10rpx 50rpx;
justify-content: space-between;
}
.highlight {
display: flex;
font-size: 28rpx;
width: 80rpx;
height: 80rpx;
justify-content: center;
border-radius: 50%;
align-items: center;
background-color: rgb(107, 194, 53);
border: 5rpx solid rgb(127, 204, 214);
}
.skip {
transform: scale(0.9);
}
.anniu .gray {
pointer-events: none;
background-color: rgba(137, 190, 178, 0.445);
display: flex;
width: 80rpx;
height: 80rpx;
font-size: 28rpx;
justify-content: center;
align-items: center;
border-radius: 50%;
border: 5rpx solid rgb(241, 244, 245);
}
- voice.json
{
"navigationBarTitleText": "一句话识别在线测试",
"backgroundColor": "#eeeeee"
}- voice.js
// pages/voice/voice.js
const recorderManager = wx.getRecorderManager()
const innerAudioContext = wx.createInnerAudioContext()
var init
Page({
/**
* 页面的初始数据
*/
data: {
time: 0,
duration: 60000,
localFilePath: "",
status: 0,
actionStatus: 0,
},
/**
* 生命周期函数--监听页面加载
*/
onLoad: function(options) {
},
/**
* 生命周期函数--监听页面初次渲染完成
*/
onReady: function() {
},
/**
* 生命周期函数--监听页面显示
*/
onShow: function() {
},
/**
* 生命周期函数--监听页面隐藏
*/
onHide: function() {
},
/**
* 生命周期函数--监听页面卸载
*/
onUnload: function() {
},
/**
* 页面相关事件处理函数--监听用户下拉动作
*/
onPullDownRefresh: function() {
},
/**
* 页面上拉触底事件的处理函数
*/
onReachBottom: function() {
},
/**
* 用户点击右上角分享
*/
onShareAppMessage: function() {
},
/**开始录音 */
start: function() {
clearInterval(init)
recorderManager.onStart((res) => {
console.log('开始录音')
this.setData({
status: 1
})
})
recorderManager.onStop((res) => {
console.log('停止录音', res)
this.setData({
tempFilePath: res.tempFilePath,
status: 3
})
this.timeCounter(this.data.time)
})
const options = {
duration: this.data.duration,
format: 'mp3',
}
this.timeCounter()
recorderManager.start(options)
},
/**
* 录音暂停
*/
stop: function() {
recorderManager.onPause(() => {
console.log('recorder pause')
this.setData({
status: 2
})
})
this.timeCounter(this.data.time)
recorderManager.pause()
},
/**
* 录音继续
*/
continue: function() {
this.setData({
status: 1
})
this.timeCounter()
recorderManager.resume()
},
/**
* 录音停止
*/
shutoff: function() {
recorderManager.onStop((res) => {
console.log('recorder stop', res)
this.setData({
tempFilePath: res.tempFilePath,
status: 3
})
})
this.timeCounter(this.data.time)
recorderManager.stop()
},
/**
* 录音识别
*/
recognition: function() {
var that=this;
wx.request({
url: 'https://tencentcloud.cdhwdl.com:3000', //仅为示例，并非真实的接口地址
method:'post',
data: {
x: "data:audio/mp3;base64," + wx.getFileSystemManager().readFileSync(this.data.tempFilePath, 'base64')
},
header: {
'content-type': 'application/json' // 默认值
},
success (res) {
that.setData({
Words: res.data.Result.Result
})
console.log(res.data)
}
})
},
/**
* 录音播放
*/
play: function() {
innerAudioContext.src = this.data.tempFilePath
innerAudioContext.obeyMuteSwitch = false
if (this.data.actionStatus == 0) {
this.setData({
actionStatus: 1
})
innerAudioContext.play()
}
innerAudioContext.onEnded(() => {
innerAudioContext.stop()
this.setData({
actionStatus: 0
})
})
},
timeCounter: function(time) {
var that = this
if (time == undefined) {
init = setInterval(function() {
var time = that.data.time + 1;
that.setData({
time: time
})
}, 1000);
} else {
clearInterval(init)
console.log("暂停计时")
}
},
/**
* 重新录制
*/
again: function() {
var that = this
wx.showModal({
title: "重新录音",
content: "是否重新录制?",
success(res) {
if (res.confirm) {
that.setData({
time: 0,
tempFilePath: "",
status: 0,
actionStatus: 0
})
innerAudioContext.stop()
}
}
})
}
})使用到的知识点： Page 构造器
文件管理器FileSystemManager读取指定编码的文件内容
注意：如果自定义函数中嵌套了wx等对象函数，数据传递应该先声明"var that=this"，然后再嵌套函数，如wx.request中使用"that.setData"来传递数据
后端数据结构
第三步：搭建nodejs服务端
任意安装一款Linux发行版系统(安装过程略)
[root@zhang .nvm]# cat /etc/redhat-release
CentOS release 6.9 (Final)安装2.0版本以上的git客户端，如果你的系统是Centos发行版的，可以参考下面的安装演示；如果是其他发行版，可以参考git官网指引，通过简单的命令即可安装
非Centos发行版系统安装方式参考Git官方文档下载指引
Centos发行版系统（这里是Centos6.9）安装流程如下：
安装Git依赖包：
检查是否安装"Development Tools"软件组，若未安装则执行安装命令
[root@zhang tmp]# yum grouplist | grep "Development Tools"
[root@zhang tmp]#
[root@zhang yum.repos.d]# yum groupinstall "Development Tools" -y
[root@zhang yum.repos.d]# yum grouplist | grep "Development tools"
Development tools安装其他软件包（如果已安装了会提示已安装）
yum install zlib-devel -y
yum install perl-ExtUtils-MakeMaker -y
yum install asciidoc -y
yum install xmlto -y
yum install openssl-devel -y
yum install gcc -y
yum install curl-devel -y
yum install expat-devel -y
yum install gettext-devel -y卸载现有Git
[root@zhang git-2.0.5]# yum remove git -y下载2.0版本的Git客户端，如果下载慢，可以用网速较好的机器下载后再上传到服务器中，下载后解压
[root@zhang tmp]# wget https://www.kernel.org/pub/software/scm/git/git-2.0.5.tar.gz[root@zhang tmp]# ls -lh | grep git
drwxrwxr-x 19 root root 12K Dec 19 2014 git-2.0.5
-rw-r--r-- 1 root root 4.7M Dec 19 2014 git-2.0.5.tar.gz进入解压目录，三步编译安装法安装
软件配置与检查
[root@zhang git-2.0.5]# ./configure --prefix=/usr/local/git编译成二进制文件
[root@zhang git-2.0.5]# make安装编译后的文件到指定目录
[root@zhang git-2.0.5]# make install将Git的运行程序路径配置到全局环境变量中（路径为"/usr/local/git/bin"）
[root@zhang git-2.0.5]# vi /etc/profile[root@zhang git-2.0.5]# cat /etc/profile | grep "export PATH="
export PATH=/usr/local/nginx/sbin:/usr/local/php/bin:/usr/local/mysql/bin:$PATH:/usr/local/git/bin使得修改生效
[root@zhang git-2.0.5]# source /etc/profile
[root@zhang git-2.0.5]# 查看git版本号
[root@zhang git-2.0.5]# git --version
git version 2.0.5安装nvm
参考官方文档：https://github.com/nvm-sh/nvm/blob/master/README.md
[root@zhang git-2.0.5]# curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh | bash
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 13527 100 13527 0 0 5385 0 0:00:02 0:00:02 --:--:-- 12131
=> Downloading nvm from git to '/root/.nvm'
=> Cloning into '/root/.nvm'...
remote: Enumerating objects: 290, done.
remote: Counting objects: 100% (290/290), done.
remote: Compressing objects: 100% (257/257), done.
remote: Total 290 (delta 35), reused 97 (delta 20), pack-reused 0
Receiving objects: 100% (290/290), 163.27 KiB | 8.00 KiB/s, done.
Resolving deltas: 100% (35/35), done.
Checking connectivity... done.
=> Compressing and cleaning up git repository
=> Appending nvm source string to /root/.bashrc
=> Appending bash_completion source string to /root/.bashrc
=> Close and reopen your terminal to start using nvm or run the following to use it now:
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion" # This loads nvm bash_completion在当前用户的环境变量配置文件"~/.bash_profile"或者全局环境变量配置文件"/etc/profile"中加入如下内容
export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")" [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
[root@zhang ~]# vi ~/.bash_profile
[root@zhang ~]# tail -2f ~/.bash_profile
export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"重载环境变量
source ~/.bash_profile测试nvm是否安装成功
[root@zhang ~]# nvm --version
0.35.3
[root@zhang ~]# 安装Node.js 7.10.1 版本及以上
[root@zhang iai]# nvm install v10.6.0
Downloading and installing node v10.6.0...
Downloading https://nodejs.org/dist/v10.6.0/node-v10.6.0-linux-x64.tar.xz...
######################################################################## 100.0%
Computing checksum with sha256sum
Checksums matched!
Now using node v10.6.0 (npm v6.1.0)
[root@zhang iai]# node -v
v10.6.0创建nodejs web项目仓库
[root@zhang data]# mkdir -p /data/nodejs创建语音识别项目
[root@zhang ~]# mkdir /data/nodejs/asr
[root@zhang ~]# cd /data/nodejs/asr安装tencentcloud-sdk-nodejs并创建一个项目入口文件app.js
[root@zhang asr]# npm install tencentcloud-sdk-nodejs --save
[root@zhang asr]# ls -lh
total 20K
drwxr-xr-x 51 root root 4.0K Apr 16 14:12 node_modules
-rw-r--r-- 1 root root 13K Apr 16 14:12 package-lock.json
[root@zhang asr]# touch app.js
[root@zhang asr]# ls -lh
total 20K
-rw-r--r-- 1 root root 0 Apr 16 14:13 app.js
drwxr-xr-x 51 root root 4.0K Apr 16 14:12 node_modules
-rw-r--r-- 1 root root 13K Apr 16 14:12 package-lock.json通过API 3.0 Explorer生成tencentcloud-sdk-nodejs下一句话识别API的调用Demo
在实现Web功能之前，我们需要知道小程序的服务端只允许HTTPS协议的地址，所以我们应该通过nodejs的HTTPS模块来实现一个加密的Web服务，具体流程如下：
- 通过一个已经实名认证的腾讯云账号在控制台进入“SSL证书”控制台，点击【申请免费证书】为你的小程序服务端域名免费申请一个SSL加密证书
- 申请成功后下载证书文件压缩包
- 解压缩后进入到Nginx目录下
- 在Linux服务端nodejs的项目目录下创建certificate目录、voice语音存放目录并配置权限755
[root@zhang asr]# ls -lh
total 20K
-rw-r--r-- 1 root root 0 Apr 16 14:13 app.js
drwxr-xr-x 51 root root 4.0K Apr 16 14:12 node_modules
-rw-r--r-- 1 root root 13K Apr 16 14:12 package-lock.json
[root@zhang asr]# mkdir certificate
[root@zhang asr]# chmod 775 certificate/
[root@zhang asr]# mkdir voice
[root@zhang asr]# chmod 775 voice/- 上传Nginx目录下的两个证书文件到服务端的certificate目录下并重名为"server.key"、"server.crt"
[root@zhang asr]# cd certificate/
[root@zhang certificate]# ls -lh
total 8.0K
-rw-r--r-- 1 root root 3.7K Apr 15 10:48 1_tencentcloud.cdhwdl.com_bundle.crt
-rw-r--r-- 1 root root 1.7K Apr 15 10:48 2_tencentcloud.cdhwdl.com.key
[root@zhang certificate]# mv 1_tencentcloud.cdhwdl.com_bundle.crt server.crt
[root@zhang certificate]# mv 2_tencentcloud.cdhwdl.com.key server.key
[root@zhang certificate]# ls -lh
total 8.0K
-rwxr-xr-x 1 root root 3.7K Apr 15 10:48 server.crt
-rwxr-xr-x 1 root root 1.7K Apr 15 10:48 server.key编辑项目入口文件app.js,通过nodejs的https模块创建一个web服务器并调用上述Demo
const https = require('https');
const fs = require('fs');
const path = require('path');
const privateKey = fs.readFileSync(path.join(__dirname, './certificate/server.key'), 'utf8');
const certificate = fs.readFileSync(path.join(__dirname, './certificate/server.crt'), 'utf8');
const credentials = {key: privateKey, cert: certificate};
const httpsServer = https.createServer(credentials,function(req, res){
let body = [];
req.on('data', (chunk) => {
body.push(chunk);
}).on('end', () => {
body = Buffer.concat(body).toString();
res.statusCode = 200;
res.setHeader('Content-Type', 'text/plain');
var json_ob = JSON.parse(body.trim());
base64 = json_ob.x;
var base64Data = base64.replace(/^data:audio\/\w+;base64,/, "");
var dataBuffer = Buffer.from(base64Data, 'base64');
var t1 = new Date().getTime();
var name = t1+".mp3";
var json = { Result: ""};
fs.writeFile("./voice/"+name, dataBuffer, { 'flag': 'a' }, function(err) {
if(err){
json.Result=err;
res.end(JSON.stringify(json));
}
});
const tencentcloud = require("./node_modules/tencentcloud-sdk-nodejs");
const AaiClient = tencentcloud.aai.v20180522.Client;
const models = tencentcloud.aai.v20180522.Models;
const Credential = tencentcloud.common.Credential;
const ClientProfile = tencentcloud.common.ClientProfile;
const HttpProfile = tencentcloud.common.HttpProfile;
let cred = new Credential("", "");
let httpProfile = new HttpProfile();
httpProfile.endpoint = "aai.tencentcloudapi.com";
let clientProfile = new ClientProfile();
clientProfile.httpProfile = httpProfile;
let client = new AaiClient(cred, "ap-guangzhou", clientProfile);
let req = new models.SentenceRecognitionRequest();
var params = {ProjectId:0,SubServiceType:2,EngSerViceType:"16k_zh",SourceType:1,VoiceFormat:"mp3",UsrAudioKey:"www",Data:base64Data};
var params = JSON.stringify(params)
req.from_json_string(params);
client.SentenceRecognition(req, function(errMsg, response) {
if (errMsg) {
json.Result=errMsg;
res.end(JSON.stringify(json));
}
json.Result=JSON.parse(response.to_json_string());
res.end(JSON.stringify(json));
});
});
});
const SSLPORT = 3000;
httpsServer.listen(SSLPORT, '0.0.0.0', () => {});服务端后台启用这个web服务
[root@zhang asr]# nohup node app.js &
[1] 2599
nohup: ignoring input and appending output to `nohup.out'我们先通过postman来在线调试下
测试OK，可以将web服务地址对接到一句话识别小程序页面中了
真实调试
原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。
如有侵权，请联系 cloudcommunity@tencent.com 删除。
原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。
如有侵权，请联系 cloudcommunity@tencent.com 删除。
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