Achieve results:
The ability to use Baidu news summaries and micro letter applets, rapid extraction news digest content and voice broadcast, news anchor back to let the AI do! This paper describes the functional development of small program implementation process, sharing subroutine modules main function, it is dry Oh! !
To learn skills to call in python3, see my previous post: "AI news anchor for your newspaper."
https://ai.baidu.com/forum/topic/show/953193
1 System Framework
The main technology used here are: Baidu universal character recognition, speech synthesis, news summaries and micro letter applets. Applet news photos uploaded by character recognition, the news content is converted by the images into text, and then extract the core by the news summary summary capabilities, and the use of news headlines read aloud the contents of the speech synthesis. Ideally suited to bring reading glasses can not see the word of the elderly, will be able to take a picture of newspaper content converted into sound, listen to would be finished.
2 Universal Character Recognition API calls
2.1 Create a console application, call the universal character recognition API, "get API Key / Secret Key".
Interface documentation Address: https://ai.baidu.com/docs#/OCR-API/e1bd77f3
Request the URL of: https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic
2.2 program to achieve
ocrRequest:function (base64Img, callback) {
//拼接接口body参数
var params = {
image: base64Img
}
//发送接口请求
wx.request({
url: ocrUrl + '?access_token=' + accessToken,
data: params,
header: {
'content-type': 'application/x-www-form-urlencoded'
},
method: 'POST',
success: function (res) {
callback.success(res.data)
console.log("request okr", res);
},
fail: function (res) {
if (callback.fail)
callback.fail()
}
})
}
3 调用新闻摘要API
3.1 在控制台创建应用，调用新闻摘要API，“获取API Key/Secret Key”。
（1）接口文档地址：https://ai.baidu.com/docs#/NLP-Apply-API/c3df5fbc
（2）请求URL: https://aip.baidubce.com/rpc/2.0/nlp/v1/news_summary
Body中放置请求参数，参数详情如下：
body整体文本内容可以支持GBK和UTF-8两种格式的编码，这里选择GBK编码。
GBK支持：默认按GBK进行编码，输入内容为GBK编码，输出内容为GBK编码，否则会接口报错编码错误；
UTF-8支持：若文本需要使用UTF-8编码，请在url参数中添加charset=UTF-8 （大小写敏感） 例如 ：https://aip.baidubce.com/rpc/2.0/nlp/v1/lexer?charset=UTF-8&access_token=24.f9ba9c5241b67688bb4adbed8bc91dec.2592000.1485570332.282335-8574074。
（3）返回参数
默认返回内容为GBK编码；
若用户指定输入为UTF-8编码（通过指定charset参数），则返回内容为UTF-8编码。
3.2 程序实现
NewsRequest: function (corpus, arg) { // corpus是要发送的对话；arg是回调方法
var that = this;
console.log("[Console log]:corpus:" + corpus);
var api = "nli";
var timestamp = new Date().getTime();
var rqJson = {
"title": "新闻摘要",
"content": corpus,
"max_summary_len": 200
};
var rq0 = JSON.stringify(rqJson);
console.log("[Console log]:rq0:" + rq0);
var nliUrl = that.globalData.NLPUrl;
console.log("[Console log]:NewsRequest(),URL:" + nliUrl);
wx.request({
url: nliUrl,
data: rq0,
header: { 'content-type': 'application/json' },
method: 'POST',
success: function (res) {
var resData = res.data.summary;
var t0 = decodeURI(resData);
console.log("[Console log]:NewsRequest() success...");
console.log("[Console log]:Result:");
console.log("[Console log]:t0:" + t0);
var nli = JSON.stringify(resData);
console.log("[Console log]:nli:" + nli);
// 回调函数，解析数据
typeof arg.success == "function" && arg.success(nli);
},
fail: function (res) {
console.log("[Console log]:NewsRequest() failed...");
console.error("[Console log]:Error Message:" + res.errMsg);
typeof arg.fail == "function" && arg.fail();
},
complete: function () {
console.log("[Console log]:NewsRequest() complete...");
typeof arg.complete == "function" && arg.complete();
}
})
},
4 调用语音合成API
4.1 在控制台创建应用，调用语音合成API，“获取API Key/Secret Key”。
（1）接口文档地址：https://ai.baidu.com/docs#/TTS-API/top
（2）请求URL: https://tsn.baidu.com/text2audio
将文本以及其他参数写入到body里面，利用html表单的方式将参数传递到服务端。 所有的参数都在body中。body里面的数据为：
tex=***&lan=zh&cuid=***&ctp=1&aue=3&tok=***
（3）返回参数
需要根据 Content-Type的头部来确定是否服务端合成成功。
如果合成成功，返回的Content-Type以“audio”开头，例如：
aue =3 ，返回为二进制mp3文件，具体header信息 Content-Type: audio/mp3；
4.2 程序实现
// 语音合成
tts: function (e) {
console.log("[Console log]tts:" + e);
var tex = encodeURI(e);//转换编码url_encode UTF8编码
var tok = "填入获得的token";
var cuid = app.globalData.NLPCusid;
var ctp = 1;
var lan = "zh"; // zh表示中文
// 字符编码
var spd = 5; // 表示朗读的语速，9代表最快，1是最慢
var url = "https://tsn.baidu.com/text2audio?tex=" + tex + "&lan=" + lan + "&cuid=" + cuid + "&ctp=" + ctp + "&tok=" + tok + "&spd=" + spd
wx.downloadFile({
url: url,
success: function (res) {
console.log(res)
filePath = res.tempFilePath;
if (res.statusCode === 200) {
//小程序自身录音，用playVoice播放不了，要用innerAudioContext
var filepath = res.tempFilePath;
console.log(filepath);
const innerAudioContext = wx.createInnerAudioContext();
innerAudioContext.src = filepath;
innerAudioContext.onPlay(() => {
console.log('开始播放')
});
innerAudioContext.onError((res) => {
console.log(res.errMsg)
console.log(res.errCode)
});
innerAudioContext.play();
}
}
})
},
5 欢迎扫码测试
作者：wangwei8638