c#爬虫-1688官网自动以图搜图

Posted 2021-05-23 dotNET跨平台

背景

在1688有个功能，就是上传图片，就可以找到类似的商品。如下

网址 ：https://www.1688.com/

这时候，我们可以使用程序来代替，大批量的完成图片上传功能。

实现思路

1、找到图片上传接口

post请求，form表单中有signature签名

2、再找sign生成接口，全局搜素找一下signature，发现了一个返回signature的接口。

接口链接：https://open-s.1688.com/openservice/ossDataService

这个接口也有一个变动的参数 appKey

全局搜索后在js文件中查看一下

往下找就可以发现appkey的生成了。

通过debug来查看生成规则。

获取加密时间的接口：https://open-s.1688.com/openservice/.htm?
参数：outfmt =json&serviceIds=cbu.searchweb.config.system.currenttime

需要先请求这个接口，获取加密时间。

 private void go(string parhfile) { var response = HttpHelper.CreateGetHttpResponse("https://open-s.1688.com/openservice/.htm?serviceIds=cbu.searchweb.config.system.currenttime&outfmt=json", 5000, null, null); Stream myResponseStream = response.GetResponseStream(); StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8")); string retString = myStreamReader.ReadToEnd(); myStreamReader.Close(); myResponseStream.Close(); if (response.StatusCode == HttpStatusCode.OK) { var ss = JsonConvert.DeserializeObject<Currenttimemodel>(retString.Replace("cbu.searchweb.config.system.currenttime", "currenttime")); // SetText("加密时间:" + ss.currenttime.dataSet.ToString()); getsin(ss.currenttime.dataSet.ToString(), parhfile); } else { SetText("错误代码：" + response.StatusCode.ToString()); } }

再把时间和appName 传入 getAppKey。

然后e= “appname ; t” ，appName的base64编码之后的结果是 “cGNfdHVzb3U=”

经过encode64返回 i ( appkey)

然后通过上面生成sign的接口：https://open-s.1688.com/openservice/ossDataService

传入参数就行请求，就可以返回signature，policy，accessid。

params = {
     "appName": key,
     "appKey": base64.b64encode(appkey.encode("utf-8")),
         }

 
   
   
 

  
    
    
  
1
  
    
    
  
2
  
    
    
  
3
  
    
    
  
4
 
   
   
 

 /// <summary> /// sign生成接口 /// </summary> /// <param name="dataSet"></param> private void getsin(string dataSet, string parhfile) { string appName = "pc_tusou"; //getAppKey string appKey = Base64.EncodeBase64("utf-8", appName + ";" + dataSet.ToString()); var response = HttpHelper.CreateGetHttpResponse("https://open-s.1688.com/openservice/ossDataService?appName=" + appName + "&appKey=" + appKey, 5000, null, null); Stream myResponseStream = response.GetResponseStream(); StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8")); string retString = myStreamReader.ReadToEnd(); myStreamReader.Close(); myResponseStream.Close(); if (response.StatusCode == HttpStatusCode.OK) { var ss = JsonConvert.DeserializeObject<Rootsin>(retString); // SetText("sign:" + ss.data.signature); string key = "cbuimgsearch/" + Base64.Getimgname() + Base64.GetTimeStamp() + ".jepg"; var client = new RestClient("https://cbusearch.oss-cn-shanghai.aliyuncs.com/"); client.Timeout = -1; var request = new RestRequest(Method.POST); request.AddHeader("Origin", "https://www.1688.com"); client.UserAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (Khtml, like Gecko) Chrome/75.0.3770.100 Safari/537.36"; request.AddHeader("Accept", "*/*"); request.AddHeader("Cache-Control", "no-cache"); request.AddHeader("cookie", "_samesite_flag_=true; _tb_token_=ee5138b911917; cookie2=163f6e3722351213514df4c9ab9116f6; t=96e8d0ab6d636f19306c429b276db552; __cn_logon__=false; ali_ab=120.253.224.246.1587973275662.6; l=caJGIJNTkgnFkWiGkSYyeKDwPQuOAiFJdcPgDahIhDlFGpKMvULclIQGPBDmDhmDdCsLYIU; na=ijBRbdRXZeKwRcTHilfNHSt+; "); request.AddHeader("refer", "https://www.1688.com/"); request.AddParameter("name", Base64.Getname() + ".jpeg"); request.AddParameter("key", key); request.AddParameter("OSSAccessKeyId", ss.data.accessid); request.AddParameter("callback", ""); request.AddParameter("policy", ss.data.policy); request.AddParameter("signature", ss.data.signature); request.AddParameter("success_action_status", "200"); request.AddFile("file", parhfile); IRestResponse response2 = client.Execute(request); Console.WriteLine(response2.Content); if (response2.StatusCode == HttpStatusCode.OK) { string picurl = "https://s.1688.com/youyuan/index.htm?tab=imageSearch&imageType=oss&imageAddress=" + key + "&spm="; SetText3("\r\n" + picurl); Write(picurl); } else { SetText("错误代码：" + response2.StatusCode.ToString()); } } else { SetText("错误代码：" + response.StatusCode.ToString()); } }

3、数据详情接口

图片上传之后，返回的数据接口：
https://search.1688.com/service/imageSearchOfferResultViewService?

参数：

imageAddress是在上传图片之后返回的值
requestId 初始化参数，可以为空。
整个流程就是这样了，接着构造请求就可以获取数据了。

完整代码

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.IO;using System.Linq;using System.Net;using System.Net.Http;using System.Net.Http.Headers;using System.Net.Security;using System.Security.Cryptography.X509Certificates;using System.Text;using System.Threading;using System.Threading.Tasks;using System.Windows.Forms;using Newtonsoft.Json;using Reptiles1688;using RestSharp;
namespace WindowsFormsApp1{ public partial class Form1 : Form { public Form1() { InitializeComponent(); }
 private void button1_Click(object sender, EventArgs e) { ThreadPool.QueueUserWorkItem(new WaitCallback(crawlingWeb), "test"); }
 public void Write(string s) { string path = System.Environment.CurrentDirectory + "\\图片url\\" + Guid.NewGuid().ToString(); if (!Directory.Exists(path)) Directory.CreateDirectory(path); FileStream fs = new FileStream(path + "\\data.txt", FileMode.Create); //获得字节数组 byte[] data = System.Text.Encoding.Default.GetBytes(s); //开始写入 fs.Write(data, 0, data.Length); //清空缓冲区、关闭流 fs.Flush(); fs.Close(); }
 private delegate void SetLabelDelegate(string value);
 private void SetText(string value) { if (this.InvokeRequired) { SetLabelDelegate d = new SetLabelDelegate(SetText); this.Invoke(d, new object[] { value }); } else { textBox1.Text = value.ToString() + textBox1.Text; } }
 private delegate void SetLabelDelegate3(string value);
 private void SetText3(string value) { if (this.InvokeRequired) { SetLabelDelegate3 d = new SetLabelDelegate3(SetText3); this.Invoke(d, new object[] { value }); } else { textBox3.Text = value.ToString() + textBox3.Text; } }
 private void crawlingWeb(object data) { for (int aa = 1; aa < 50; aa++) { // SetText3(aa.ToString()); for (int a = 1; a < 4; a++) { string ss = "D:\\pppppppppppppp\\" + a + ".jpg"; // SetText3(aa.ToString() + "-" + a);
 go(ss); Thread.Sleep(500); } }
 SetText3("\r\n ok"); }
 private void go(string parhfile) { var response = HttpHelper.CreateGetHttpResponse("https://open-s.1688.com/openservice/.htm?serviceIds=cbu.searchweb.config.system.currenttime&outfmt=json", 5000, null, null); Stream myResponseStream = response.GetResponseStream(); StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8")); string retString = myStreamReader.ReadToEnd(); myStreamReader.Close(); myResponseStream.Close(); if (response.StatusCode == HttpStatusCode.OK) { var ss = JsonConvert.DeserializeObject<Currenttimemodel>(retString.Replace("cbu.searchweb.config.system.currenttime", "currenttime")); // SetText("加密时间:" + ss.currenttime.dataSet.ToString()); getsin(ss.currenttime.dataSet.ToString(), parhfile); } else { SetText("错误代码：" + response.StatusCode.ToString()); } }
 /// <summary> /// sign生成接口 /// </summary> /// <param name="dataSet"></param> private void getsin(string dataSet, string parhfile) { string appName = "pc_tusou"; //getAppKey string appKey = Base64.EncodeBase64("utf-8", appName + ";" + dataSet.ToString()); var response = HttpHelper.CreateGetHttpResponse("https://open-s.1688.com/openservice/ossDataService?appName=" + appName + "&appKey=" + appKey, 5000, null, null); Stream myResponseStream = response.GetResponseStream(); StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8")); string retString = myStreamReader.ReadToEnd(); myStreamReader.Close(); myResponseStream.Close(); if (response.StatusCode == HttpStatusCode.OK) { var ss = JsonConvert.DeserializeObject<Rootsin>(retString); // SetText("sign:" + ss.data.signature); string key = "cbuimgsearch/" + Base64.Getimgname() + Base64.GetTimeStamp() + ".jepg"; var client = new RestClient("https://cbusearch.oss-cn-shanghai.aliyuncs.com/"); client.Timeout = -1; var request = new RestRequest(Method.POST); request.AddHeader("Origin", "https://www.1688.com"); client.UserAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"; request.AddHeader("Accept", "*/*"); request.AddHeader("Cache-Control", "no-cache"); request.AddHeader("cookie", "_samesite_flag_=true; _tb_token_=ee5138b911917; cookie2=163f6e3722351213514df4c9ab9116f6; t=96e8d0ab6d636f19306c429b276db552; __cn_logon__=false; ali_ab=120.253.224.246.1587973275662.6; l=caJGIJNTkgnFkWiGkSYyeKDwPQuOAiFJdcPgDahIhDlFGpKMvULclIQGPBDmDhmDdCsLYIU; na=ijBRbdRXZeKwRcTHilfNHSt+; "); request.AddHeader("refer", "https://www.1688.com/"); request.AddParameter("name", Base64.Getname() + ".jpeg"); request.AddParameter("key", key); request.AddParameter("OSSAccessKeyId", ss.data.accessid); request.AddParameter("callback", ""); request.AddParameter("policy", ss.data.policy); request.AddParameter("signature", ss.data.signature); request.AddParameter("success_action_status", "200"); request.AddFile("file", parhfile); IRestResponse response2 = client.Execute(request); Console.WriteLine(response2.Content); if (response2.StatusCode == HttpStatusCode.OK) { string picurl = "https://s.1688.com/youyuan/index.htm?tab=imageSearch&imageType=oss&imageAddress=" + key + "&spm="; SetText3("\r\n" + picurl); Write(picurl); } else { SetText("错误代码：" + response2.StatusCode.ToString()); } } else { SetText("错误代码：" + response.StatusCode.ToString()); } } }}