C#爬虫1688以图搜图API接口功能的实现

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")),
         }

  /// <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());            }        }    }}