//dependency：okio-1.14.0,shiro-core-1.4.0,okhttp-3.11.0
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import org.apache.shiro.crypto.hash.Md5Hash;
import java.io.IOException;
import java.time.Instant;

public class Test {

    public static void main(String[] args) throws IOException {

        String key = "M***********g";
        String secret = "3***********6";

        long timestamp = Instant.now().toEpochMilli();
        String token = new Md5Hash(key + "+" + timestamp + "+" + secret).toString();

        RequestBody body = new MultipartBody.Builder().setType(MultipartBody.FORM)
                .addFormDataPart("img", "/9j")
                .addFormDataPart("key", key)
                .addFormDataPart("token", token)
                .addFormDataPart("timestamp", String.valueOf(timestamp))
                .addFormDataPart("typeId", "20090")
                .build();
        Request request = new Request.Builder()
                .url("https://flyocr.com/api/v2/recogInvoiveBase64.do")
                .method("POST", body)
                .build();
        OkHttpClient client = new OkHttpClient();
        Response response = client.newCall(request).execute();
        System.out.println(response.body().string());
    }
}

import requests
import hashlib
import time

def generate_token(key, timestamp, secret):
    hash_string = f"{key}+{timestamp}+{secret}"
    return hashlib.md5(hash_string.encode()).hexdigest()

def make_request():
    key = "M***********g"
    secret = "3***********6"
    timestamp = int(time.time() * 1000)
    token = generate_token(key, timestamp, secret)

    files = {
        'key': (None, key),
        'typeId': (None, '20090'),
        'timestamp': (None, str(timestamp)),
        'token': (None, token),
        'img': (None, "/9j")
    }

    response = requests.post('https://flyocr.com/api/v2/recogInvoiveBase64.do', files=files)
    return response.text

if __name__ == '__main__':
    response_text = make_request()
    print(response_text)

const crypto = require('crypto');
const FormData = require('form-data');
const $ = require('jquery');

var key = "M***********g";
var secret = "3***********6";
var timestamp = Date.now();

var token = crypto.createHash('md5').update(key + "+" + timestamp + "+" + secret).digest('hex');

var form = new FormData();
form.append("key", key);
form.append("typeId", "20090");
form.append("timestamp", String(timestamp));
form.append("token", token);
form.append("img", "/9j");

var settings = {
 "url": "https://flyocr.com/api/v2/recogInvoiveBase64.do",
 "method": "POST",
 "timeout": 0,
 "processData": false,
 "mimeType": "multipart/form-data",
 "contentType": false,
 "data": form,
 "success": function(response) {
     console.log(response);
 },
 "error": function(xhr, status, error) {
     console.error(status, error);
 }
};

$.ajax(settings);

<?php
$key = "M***********g";
$secret = "3***********6";
$timestamp = time();
$token = md5($key . '+' . $timestamp . '+' . $secret);

$data = array(
    'key' => $key,
    'typeId' => '20090',
    'timestamp' => $timestamp,
    'token' => $token,
    'img' => '/9j'
);

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://flyocr.com/api/v2/recogInvoiveBase64.do",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => $data,
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;
?>

using System;
using System.IO;
using System.Net.Http;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

public class Test
{
    public static async Task Main(string[] args)
    {
        string key = "M***********g";
        string secret = "3***********6";
        long timestamp = DateTimeOffset.Now.ToUnixTimeMilliseconds();

        using (var md5 = MD5.Create())
        {
            string rawData = key + "+" + timestamp + "+" + secret;
            byte[] inputBytes = Encoding.UTF8.GetBytes(rawData);
            byte[] hashBytes = md5.ComputeHash(inputBytes);

            var sb = new StringBuilder();
            foreach (var t in hashBytes)
            {
                sb.Append(t.ToString("X2"));
            }
            string token = sb.ToString();

            using (var client = new HttpClient())
            {
                using (var content = new MultipartFormDataContent())
                {
                    content.Add(new StringContent(key), "key");
                    content.Add(new StringContent("20090"), "typeId");
                    content.Add(new StringContent(timestamp.ToString()), "timestamp");
                    content.Add(new StringContent(token), "token");
                    content.Add(new StringContent("/91"), "img");

                    string url = "https://flyocr.com/api/v2/recogInvoiveBase64.do";
                    var response = await client.PostAsync(url, content);

                    string responseString = await response.Content.ReadAsStringAsync();
                    Console.WriteLine(responseString);
                }
            }
        }
    }
}

#include <iostream>
#include <sstream>
#include <string>
#include <curl/curl.h>
#include <openssl/md5.h>
#include <iomanip>
#include <chrono>

std::string getMd5Hash(const std::string& data) {
    unsigned char result[MD5_DIGEST_LENGTH];
    MD5(reinterpret_cast<const unsigned char*>(data.c_str()), data.size(), result);

    std::ostringstream sout;
    sout << std::hex << std::setfill('0');
    for (auto c : result) {
        sout << std::setw(2) << static_cast<int>(c);
    }

    return sout.str();
}

int main() {
    CURL* curl;
    CURLcode res;

    std::string key = "M***********g";
    std::string secret = "3***********6";
    auto timestamp = std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::system_clock::now().time_since_epoch()
    ).count();
    std::string token = getMd5Hash(key + "+" + std::to_string(timestamp) + "+" + secret);

    std::string data = "key=" + key + "&typeId=2×tamp=" +
                       std::to_string(timestamp) + "&token=" + token +
                       "&img=/9j";

    curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "https://flyocr.com/api/v2/recogInvoiveBase64.do");
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data.c_str());

        res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << '\n';
        }
        curl_easy_cleanup(curl);
    }

    return 0;
}

package main

import (
    "bytes"
    "crypto/md5"
    "fmt"
    "io"
    "mime/multipart"
    "net/http"
    "time"
)

func main() {
    key := "M***********g"
    secret := "3***********6"
    timestamp := time.Now().UnixNano() / int64(time.Millisecond)
    tokenData := fmt.Sprintf("%s+%d+%s", key, timestamp, secret)

    h := md5.New()
    _, _ = io.WriteString(h, tokenData)
    token := fmt.Sprintf("%x", h.Sum(nil))

    body := &bytes.Buffer{}
    writer := multipart.NewWriter(body)

    _ = writer.WriteField("key", key)
    _ = writer.WriteField("typeId", "20090")
    _ = writer.WriteField("timestamp", fmt.Sprintf("%d", timestamp))
    _ = writer.WriteField("token", token)
    _ = writer.WriteField("img", "/9j")

    writer.Close()

    req, err := http.NewRequest("POST", "https://flyocr.com/api/v2/recogInvoiveBase64.do", body)
    if err != nil {
        fmt.Println("Error creating request:", err)
        return
    }
    req.Header.Set("Content-Type", writer.FormDataContentType())

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        fmt.Println("Error sending request:", err)
        return
    }
    defer resp.Body.Close()

    respBody, err := io.ReadAll(resp.Body)
    if err != nil {
        fmt.Println("Error reading response:", err)
        return
    }

    fmt.Println("Response:", string(respBody))
}

const crypto = require('crypto');
const fetch = require('node-fetch');
const FormData = require('form-data');

const key = "M***********g";
const secret = "3***********6";

const timestamp = Date.now();
const token = crypto
  .createHash('md5')
  .update(`++`)
  .digest('hex');

const form = new FormData();
form.append('key', key);
form.append('typeId', '20090');
form.append('timestamp', timestamp.toString());
form.append('token', token);
form.append('img', '/9j');

fetch('https://flyocr.com/api/v2/recogInvoiveBase64.do', {
  method: 'POST',
  body: form
})
.then(response => response.text())
.then(console.log);

import Foundation
import Alamofire

func MD5(string: String) -> String {
    let length = Int(CC_MD5_DIGEST_LENGTH)
    let messageData = string.data(using:.utf8)!
    var digestData = Data(count: length)

    _ = digestData.withUnsafeMutableBytes { digestBytes -> UInt8 in
        messageData.withUnsafeBytes { messageBytes -> UInt8 in
            if let messageBytesBaseAddress = messageBytes.baseAddress,
                let digestBytesBlindMemory = digestBytes.bindMemory(to: UInt8.self).baseAddress {
                let messageLength = CC_LONG(messageData.count)
                CC_MD5(messageBytesBaseAddress, messageLength, digestBytesBlindMemory)
            }
            return 0
        }
    }
    return digestData.map { String(format: "%02hhx", $0) }.joined()
}

let key = "M***********g"
let secret = "3***********6"
let timestamp = "\(Int(Date().timeIntervalSince1970 * 1000))"
let token = MD5(string: "\(key)+\(timestamp)+\(secret)")

let parameters: [String: String] = [
    "key": key,
    "token": token,
    "timestamp": timestamp,
    "typeId": "20090",
    "img": "/9j"
]

AF.upload(multipartFormData: { multipartFormData in
    for (key, value) in parameters {
        multipartFormData.append(value.data(using: .utf8)!, withName: key)
    }
}, to: "https://flyocr.com/api/v2/recogInvoiveBase64.do")
.response { response in
    debugPrint(response)
}

import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.concurrent.TimeUnit;

import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class MyClass {

    public static void main(String[] args) {
        String key = "M***********g";
        String secret = "3***********6";

        long timestamp = System.currentTimeMillis();
        String tokenString = key + "+" + timestamp + "+" + secret;
        String token = md5(tokenString);

        RequestBody requestBody = new MultipartBody.Builder()
                .setType(MultipartBody.FORM)
                .addFormDataPart("key", key)
                .addFormDataPart("typeId", "20090")
                .addFormDataPart("timestamp", Long.toString(timestamp))
                .addFormDataPart("token", token)
                .addFormDataPart("img", "/91")
                .build();

        Request request = new Request.Builder()
                .url("https://flyocr.com/api/v2/recogInvoiveBase64.do")
                .post(requestBody)
                .build();

        OkHttpClient client = new OkHttpClient.Builder()
                .connectTimeout(30, TimeUnit.SECONDS)
                .writeTimeout(30, TimeUnit.SECONDS)
                .readTimeout(30, TimeUnit.SECONDS)
                .build();

        try {
            Response response = client.newCall(request).execute();
            System.out.println(response.body().string());
            response.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static String md5(String s) {
        try {
            MessageDigest digest = MessageDigest.getInstance("MD5");
            digest.update(s.getBytes());
            byte messageDigest[] = digest.digest();

            StringBuilder hexString = new StringBuilder();
            for (byte aMessageDigest : messageDigest) {
                String h = Integer.toHexString(0xFF & aMessageDigest);
                while (h.length() < 2)
                    h = "0" + h;
                hexString.append(h);
            }
            return hexString.toString();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }
}