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实习日志2（活字格调用服务端向百度ai发接口请求）_调用百度ai接口

作者：盐析白兔 | 2024-04-17 18:56:20

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调用百度ai接口

试了一下前端获取token，失败，报错：

Access to XMLHttpRequest at 'https://aip.baidubce.com/oauth/2.0/token' from origin 'http://localhost:44203' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

问题描述：

遇到的错误消息与跨域资源共享（CORS）有关。CORS是由Web浏览器实施的安全功能，用于限制网页对不同于提供网页的域的请求。

在情况下，从http://localhost:44203向https://aip.baidubce.com/oauth/2.0/token发出请求，而https://aip.baidubce.com上的服务器未配置为允许来自本地域的请求。

解决办法：

在本地机器上设置代理服务器，将请求转发到https://aip.baidubce.com。这样，你的请求将来自与页面相同的域，就不会遇到CORS问题。

报错的代码
  1. // 获取当前页面上名称为account的单元格
  2. // 获取当前页面
  3. var page = Forguncy.Page;
  4. var AppID = page.getCell("AppID").getValue();
  5. var APIKey = page.getCell("APIKey").getValue();
  6. var SecretKey = page.getCell("SecretKey").getValue();
  7. var AESKey = page.getCell("AESKey").getValue();
  8. var access_tokenCell = page.getCell("access_token");
  9.  
  10. // 请求地址
  11. const url = `https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=${APIKey}&client_secret=${SecretKey}`;
  12.  
  13. // 创建XHR对象
  14. const xhr = new XMLHttpRequest();
  15.  
  16. // 设置请求方法和URL
  17. xhr.open('POST', url, true);
  18.  
  19. // 设置请求头
  20. xhr.setRequestHeader('Content-Type', 'application/json');
  21. xhr.setRequestHeader('Accept', 'application/json');
  22.  
  23. // 处理响应
  24. xhr.onreadystatechange = function () {
  25.     if (xhr.readyState === 4) {
  26.         if (xhr.status === 200) {
  27.             // 处理响应数据
  28.             const responseData = xhr.responseText;
  29.             alert("响应数据: " + responseData);
  30.             console.log('responseData: ' + responseData)
  31.             // 将JSON字符串解析为JavaScript对象
  32.             const responseObject = JSON.parse(responseData);
  33.             console.log('responseObject: ' + responseObject)
  34.             // 获取data值
  35.             const data = responseObject.data;
  36.             console.log('data: ' + data)
  37.             access_tokenCell.setValue(data.access_token);
  38.             // //获取页面上的表格
  39.             // var listview = page.getListView("表格1");
  40.             // //添加新行
  41.             // listview.addNewRow(jsonDataObject);
  42.         } else {
  43.             // 处理错误
  44.             console.error('Error:', xhr.status, xhr.statusText);
  45.             alert("Error" + xhr.status + "  " + xhr.statusText);
  46.         }
  47.     }
  48. };
  49.  
  50. // 发送请求
  51. xhr.send(JSON.stringify(""));

修改后的代码：

  1. // 获取当前页面上名称为account的单元格
  2. // 获取当前页面
  3. var page = Forguncy.Page;
  4. var access_token = page.getCell("access_token").getValue();
  5. var imageUrl = page.getCell("imageUrl").getValue();
  6. var result=page.getCell("result");
  7. //获取单元格的值
  8. var data = {
  9.     //传入请求地址
  10.     token: access_token,
  11.     imageUrl: imageUrl
  12. };
  13. Forguncy.Helper.post("customapi/fapiaoapi/vatInvoice", data, function (res) {
  14.     console.log("res:"+res);
  15.     let jsonData=JSON.parse(res);
  16.     console.log(jsonData.words_result);
  17.     jsonData=JSON.stringify(jsonData.words_result);
  18.     console.log(jsonData);
  19.     result.setValue(res);
  20. });
其中调用的C#类库代码：
  1. using GrapeCity.Forguncy.ServerApi;
  2. using Microsoft.AspNetCore.Http;
  3. using System;
  4. using System.Collections.Generic;
  5. using System.Linq;
  6. using System.Runtime.InteropServices;
  7. using System.Runtime.Remoting.Contexts;
  8. using System.Text;
  9. using System.Threading.Tasks;
  10. using System.IO;
  11. using RestSharp;
  12. using System.Net;
  13. using System.Web;
  14.  
  15. namespace FaPiaoApi
  16. {
  17.     public class FaPiaoApi : ForguncyApi
  18.     {
  19.         [Post]
  20.         public async Task GetTokenApi()
  21.         {
  22.             //获取post请求的数据
  23.             var form = await Context.Request.ReadFormAsync();
  24.             var url = form["url"][0];
  25.  
  26.             var client = new RestClient(url);
  27.             client.Timeout = -1;
  28.             var request = new RestRequest(Method.POST);
  29.             request.AddHeader("Content-Type", "application/json");
  30.             request.AddHeader("Accept", "application/json");
  31.             var body = @"";
  32.             request.AddParameter("application/json", body, ParameterType.RequestBody);
  33.             IRestResponse response = client.Execute(request);
  34.             Console.WriteLine(response.Content);
  35.             //响应数据
  36.             await this.Context.Response.WriteAsync(response.Content);
  37.  
  38.         }
  39.         [Post]
  40.         public async Task VatInvoice()
  41.         {
  42.             //获取post请求的数据
  43.             var form = await Context.Request.ReadFormAsync();
  44.             var token = form["token"][0];
  45.             var imageUrl = form["imageUrl"][0];
  46.             var client = new RestClient("https://aip.baidubce.com/rest/2.0/ocr/v1/vat_invoice?access_token=" + token);
  47.             client.Timeout = -1;
  48.             var request = new RestRequest(Method.POST);
  49.             request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
  50.             request.AddHeader("Accept", "application/json");
  51.             request.AddParameter("url", imageUrl);
  52.             request.AddParameter("seal_tag", "false");
  53.             IRestResponse response = client.Execute(request);
  54.             Console.WriteLine(response.Content);
  55.             //响应数据
  56.             await this.Context.Response.WriteAsync(response.Content);
  57.         }
  58.     }
  59. }
返回的信息普通发票没有check_code校验码，我蚌埠住了，验真功能好像做不出来了qwq

先提取发票验真需要的参数,并做一些参数类型转换
  1. // 获取当前页面上名称为account的单元格
  2. // 获取当前页面
  3. var page = Forguncy.Page;
  4. var access_token = page.getCell("access_token").getValue();
  5. var imageUrl = page.getCell("imageUrl").getValue();
  6. var resultCell = page.getCell("result");
  7. var invoiceCodeCell = page.getCell("invoice_code");
  8. var invoiceNumCell = page.getCell("invoice_num");
  9. var invoiceDateCell = page.getCell("invoice_date");
  10. var invoiceTypeCell = page.getCell("invoice_type");
  11. var checkCodeCell = page.getCell("check_code");
  12. var totalAmountCell = page.getCell("total_amount");
  13.  
  14. //获取单元格的值
  15. var data = {
  16.     //传入请求地址
  17.     token: access_token,
  18.     imageUrl: imageUrl
  19. };
  20. Forguncy.Helper.post("customapi/fapiaoapi/vatInvoice", data, function (res) {
  21.     console.log("res:" + res);
  22.     let jsonData = JSON.parse(res);
  23.     jsonData = jsonData.words_result;
  24.     console.log(jsonData);
  25.     invoiceCodeCell.setValue(jsonData.InvoiceCode);
  26.     invoiceNumCell.setValue(jsonData.InvoiceNum);
  27.     invoiceDateCell.setValue(convertDateFormat(jsonData.InvoiceDate));
  28.     invoiceTypeCell.setValue(translateInvoiceType(jsonData.InvoiceType));
  29.     checkCodeCell.setValue(jsonData.CheckCode);
  30.     totalAmountCell.setValue(jsonData.TotalAmount);
  31.     resultCell.setValue(JSON.stringify(jsonData));
  32.     
  33. });
  34.  
  35.  
  36. //日期格式转换
  37. function convertDateFormat(inputDateString) {
  38.     // 使用正则表达式提取数字
  39.     var numbersArray = inputDateString.match(/\d+/g);
  40.     // 将数字字符串拼接在一起
  41.     var outputDateString = numbersArray.join("");
  42.     return outputDateString;
  43. }
  44.  
  45. //发票种类格式转换
  46. function translateInvoiceType(chineseInvoiceType) {
  47.     var translationMap = {
  48.         "增值税专用发票": "special_vat_invoice",
  49.         "增值税电子专用发票": "elec_special_vat_invoice",
  50.         "增值税普通发票": "normal_invoice",
  51.         "增值税普通发票（电子）": "elec_normal_invoice",
  52.         "电子发票(普通发票)": "elec_normal_invoice",
  53.         "增值税普通发票（卷式）": "roll_normal_invoice",
  54.         "通行费增值税电子普通发票": "toll_elec_normal_invoice",
  55.         "区块链电子发票（目前仅支持深圳地区）": "blockchain_invoice",
  56.         "全电发票（专用发票）": "elec_invoice_special",
  57.         "全电发票（普通发票）": "elec_invoice_normal",
  58.         "货运运输业增值税专用发票": "special_freight_transport_invoice",
  59.         "机动车销售发票": "motor_vehicle_invoice",
  60.         "二手车销售发票": "used_vehicle_invoice"
  61.     };
  62.  
  63.     // 检查输入的中文发票类型是否在映射中，如果是则返回对应的英文翻译，否则返回原始值
  64.     for (var chineseType in translationMap) {
  65.         if (chineseInvoiceType.includes(chineseType)) {
  66.             return translationMap[chineseType];
  67.         }
  68.     }
  69.  
  70.     // 如果未找到匹配的中文发票类型，则返回空值
  71.     return "";
  72. }
然后验真的C#请求百度ai代码
  1. using GrapeCity.Forguncy.ServerApi;
  2. using Microsoft.AspNetCore.Http;
  3. using System;
  4. using System.Collections.Generic;
  5. using System.Linq;
  6. using System.Runtime.InteropServices;
  7. using System.Runtime.Remoting.Contexts;
  8. using System.Text;
  9. using System.Threading.Tasks;
  10. using System.IO;
  11. using RestSharp;
  12. using System.Net;
  13. using System.Web;
  14.  
  15. namespace FaPiaoApi
  16. {
  17.     public class FaPiaoApi : ForguncyApi
  18.     {
  19.         [Post]
  20.         public async Task GetTokenApi()
  21.         {
  22.             //获取post请求的数据
  23.             var form = await Context.Request.ReadFormAsync();
  24.             var url = form["url"][0];
  25.  
  26.             var client = new RestClient(url);
  27.             client.Timeout = -1;
  28.             var request = new RestRequest(Method.POST);
  29.             request.AddHeader("Content-Type", "application/json");
  30.             request.AddHeader("Accept", "application/json");
  31.             var body = @"";
  32.             request.AddParameter("application/json", body, ParameterType.RequestBody);
  33.             IRestResponse response = client.Execute(request);
  34.             Console.WriteLine(response.Content);
  35.             //响应数据
  36.             await this.Context.Response.WriteAsync(response.Content);
  37.  
  38.         }
  39.         [Post]
  40.         public async Task VatInvoice()
  41.         {
  42.             //获取post请求的数据
  43.             var form = await Context.Request.ReadFormAsync();
  44.             var token = form["token"][0];
  45.             var imageUrl = form["imageUrl"][0];
  46.             var client = new RestClient("https://aip.baidubce.com/rest/2.0/ocr/v1/vat_invoice?access_token=" + token);
  47.             client.Timeout = -1;
  48.             var request = new RestRequest(Method.POST);
  49.             request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
  50.             request.AddHeader("Accept", "application/json");
  51.             request.AddParameter("url", imageUrl);
  52.             request.AddParameter("seal_tag", "false");
  53.             IRestResponse response = client.Execute(request);
  54.             Console.WriteLine(response.Content);
  55.             //响应数据
  56.             await this.Context.Response.WriteAsync(response.Content);
  57.         }
  58.         [Post]
  59.         public async Task VatInvoiceVerification()
  60.         {
  61.             //获取post请求的数据
  62.             var form = await Context.Request.ReadFormAsync();
  63.             var token = form["token"][0];
  64.             var invoice_code = form["invoice_code"][0];
  65.             var invoice_num = form["invoice_num"][0];
  66.             var invoice_date = form["invoice_date"][0];
  67.             var invoice_type = form["invoice_type"][0];
  68.             var check_code = form["check_code"][0];
  69.             var total_amount = form["total_amount"][0];
  70.  
  71.             var client = new RestClient("https://aip.baidubce.com/rest/2.0/ocr/v1/vat_invoice_verification?access_token=" + token);
  72.             client.Timeout = -1;
  73.             var request = new RestRequest(Method.POST);
  74.             request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
  75.             request.AddHeader("Accept", "application/json");
  76.             request.AddParameter("invoice_code", invoice_code);
  77.             request.AddParameter("invoice_num", invoice_num);
  78.             request.AddParameter("invoice_date", invoice_date);
  79.             request.AddParameter("invoice_type", invoice_type);
  80.             request.AddParameter("check_code", check_code);
  81.             request.AddParameter("total_amount", total_amount);
  82.             IRestResponse response = client.Execute(request);
  83.             Console.WriteLine(response.Content);
  84.             //响应数据
  85.             await this.Context.Response.WriteAsync(response.Content);
  86.         }
  87.     }
  88. }
发票验真的前端js代码
  1. // 获取当前页面上名称为account的单元格
  2. // 获取当前页面
  3. var page = Forguncy.Page;
  4. var access_token = page.getCell("access_token").getValue();
  5. var invoiceCode = page.getCell("invoice_code").getValue();
  6. var invoiceNum = page.getCell("invoice_num").getValue();
  7. var invoiceDate = page.getCell("invoice_date").getValue();
  8. var invoiceType = page.getCell("invoice_type").getValue();
  9. var checkCode = page.getCell("check_code").getValue();
  10. var totalAmount = page.getCell("total_amount").getValue();
  11. var verifyMessageCell= page.getCell("verifyMessage");
  12. //获取单元格的值
  13. var data = {
  14.     //传入请求地址
  15.     token: access_token,
  16.     invoice_code: invoiceCode,
  17.     invoice_num: invoiceNum,
  18.     invoice_date: invoiceDate,
  19.     invoice_type: invoiceType,
  20.     check_code: checkCode,
  21.     total_amount: totalAmount,
  22. };
  23. console.log("check_code:"+checkCode);
  24. if(checkCode==""){
  25. alert("check_code未检测到，无法验真");
  26. }else{
  27. Forguncy.Helper.post("customapi/fapiaoapi/vatinvoiceverification", data, function (res) {
  28.     console.log("res:" + res);
  29.     let jsonData = JSON.parse(res);
  30.     console.log(jsonData);
  31.     verifyMessageCell.setValue(jsonData.VerifyMessage);
  32. });
  33. }
  34.
添加验真提示防止资源浪费 

 验真返回结果 

BUG记录：

调用的接口：

1.增值税发票识别（bug：识别不出校验码）

2.增值税发票验真（bug：验真结果与实际情况不符）

问题：

验真功能调用后识别结果为不一致，我感觉是识别功能没把校验码识别出来导致的

试了很多次，校验码识别不出

这是我用来测试的增值税发票，这是发票在服务器minio中的url：http://47.109.133.206:9000/fapiao/fapiao.png

可以直接通过url访问这个图片

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