curl --location --request POST 'https://cloudapi.deepfinch.com/ocr/vin' \
--header 'X-DF-API-ID: xxxx' \
--header 'X-DF-API-SECRET: xxxx' \
--form 'file=@/path/to/file'

package main

import (
   "fmt"
   "bytes"
   "mime/multipart"
   "os"
   "path/filepath"
   "io"
   "net/http"
   "io/ioutil"
)

func main() {

   url := "https://cloudapi.deepfinch.com/ocr/vin"
   method := "POST"

   payload := &bytes.Buffer{}
   writer := multipart.NewWriter(payload)
   file, errFile1 := os.Open("/path/to/file")
   defer file.Close()
   part1,
         errFile1 := writer.CreateFormFile("file",filepath.Base("/path/to/file"))
   _, errFile1 = io.Copy(part1, file)
   if errFile1 !=nil {
          
      fmt.Println(errFile1)
   }
   err := writer.Close()
   if err != nil {
      fmt.Println(err)
   }


   client := &http.Client {
   }
   req, err := http.NewRequest(method, url, payload)

   if err != nil {
      fmt.Println(err)
   }
   req.Header.Add("X-DF-API-ID", "xxxx")
   req.Header.Add("X-DF-API-SECRET", "xxxx")

   req.Header.Set("Content-Type", writer.FormDataContentType())
   res, err := client.Do(req)
   defer res.Body.Close()
   body, err := ioutil.ReadAll(res.Body)

   fmt.Println(string(body))
}

OkHttpClient client = new OkHttpClient().newBuilder()
   .build();
MediaType mediaType = MediaType.parse("text/plain");
RequestBody body = new MultipartBody.Builder().setType(MultipartBody.FORM)
   .addFormDataPart("file","file",
      RequestBody.create(MediaType.parse("application/octet-stream"),
      new File("/path/to/file")))
   .build();
Request request = new Request.Builder()
   .url("https://cloudapi.deepfinch.com/ocr/vin")
   .method("POST", body)
   .addHeader("X-DF-API-ID", "xxxx")
   .addHeader("X-DF-API-SECRET", "xxxx")
   .build();
Response response = client.newCall(request).execute();

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
   CURLOPT_URL => "https://cloudapi.deepfinch.com/ocr/vin",
   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 => array('file'=> new CURLFILE('/path/to/file')),
   CURLOPT_HTTPHEADER => array(
      "X-DF-API-ID: xxxx",
      "X-DF-API-SECRET: xxxx"
   ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;

import requests

url = "https://cloudapi.deepfinch.com/ocr/vin"

payload = {}
files = [
   ('file', open('/path/to/file','rb'))
]
headers = {
   'X-DF-API-ID': 'xxxx',
   'X-DF-API-SECRET': 'xxxx'
}

response = requests.request("POST", url, headers=headers, data = payload, files = files)

print(response.text.encode('utf8'))

require "uri"
require "net/http"

url = URI("https://cloudapi.deepfinch.com/ocr/vin")

https = Net::HTTP.new(url.host, url.port);
https.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-DF-API-ID"] = "xxxx"
request["X-DF-API-SECRET"] = "xxxx"
form_data = [['file', File.open('/path/to/file')]]
request.set_form form_data, 'multipart/form-data'
response = https.request(request)
puts response.read_body

#import <Foundation/Foundation.h>

dispatch_semaphore_t sema = dispatch_semaphore_create(0);

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://cloudapi.deepfinch.com/ocr/vin"]
   cachePolicy:NSURLRequestUseProtocolCachePolicy
   timeoutInterval:10.0];
NSDictionary *headers = @{
   @"X-DF-API-ID": @"xxxx",
   @"X-DF-API-SECRET": @"xxxx"
};

[request setAllHTTPHeaderFields:headers];
NSArray *parameters = @[
   @{ @"name": @"file", @"fileName": @"/path/to/file" } 
];

NSString *boundary = @"----WebKitFormBoundary7MA4YWxkTrZu0gW";
NSError *error;
NSMutableString *body = [NSMutableString string];

for (NSDictionary *param in parameters) {
   [body appendFormat:@"--%@\r\n", boundary];
   if (param[@"fileName"]) {
      [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"; filename=\"%@\"\r\n", param[@"name"], param[@"fileName"]];
      [body appendFormat:@"Content-Type: %@\r\n\r\n", param[@"contentType"]];
      [body appendFormat:@"%@", [NSString stringWithContentsOfFile:param[@"fileName"] encoding:NSUTF8StringEncoding error:&error]];
      if (error) {
         NSLog(@"%@", error);
      }
   } else {
      [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"\r\n\r\n", param[@"name"]];
      [body appendFormat:@"%@", param[@"value"]];
   }
}
[body appendFormat:@"\r\n--%@--\r\n", boundary];
NSData *postData = [body dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:postData];

[request setHTTPMethod:@"POST"];

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
   if (error) {
      NSLog(@"%@", error);
   } else {
      NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
      NSError *parseError = nil;
      NSDictionary *responseDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
      NSLog(@"%@",responseDictionary);
      dispatch_semaphore_signal(sema);
   }
}];
[dataTask resume];
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);

import Foundation

var semaphore = DispatchSemaphore (value: 0)

let parameters = [
   [
      "key": "file",
      "src": "/path/to/file",
      "type": "file"
   ]] as [[String : Any]]

let boundary = "Boundary-\(UUID().uuidString)"
var body = ""
var error: Error? = nil
for param in parameters {
   if param["disabled"] == nil {
      let paramName = param["key"]!
      body += "--\(boundary)\r\n"
      body += "Content-Disposition:form-data; name=\"\(paramName)\""
      let paramType = param["type"] as! String
      if paramType == "text" {
         let paramValue = param["value"] as! String
         body += "\r\n\r\n\(paramValue)\r\n"
      } else {
         let paramSrc = param["src"] as! String
         let fileData = try NSData(contentsOfFile:paramSrc, options:[]) as Data
         let fileContent = String(data: fileData, encoding: .utf8)!
         body += "; filename=\"\(paramSrc)\"\r\n"
           + "Content-Type: \"content-type header\"\r\n\r\n\(fileContent)\r\n"
      }
   }
}
body += "--\(boundary)--\r\n";
let postData = body.data(using: .utf8)

var request = URLRequest(url: URL(string: "https://cloudapi.deepfinch.com/ocr/vin")!,timeoutInterval: Double.infinity)
request.addValue("xxxx", forHTTPHeaderField: "X-DF-API-ID")
request.addValue("xxxx", forHTTPHeaderField: "X-DF-API-SECRET")
request.addValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")

request.httpMethod = "POST"
request.httpBody = postData

let task = URLSession.shared.dataTask(with: request) { data, response, error in 
   guard let data = data else {
      print(String(describing: error))
      return
   }
   print(String(data: data, encoding: .utf8)!)
   semaphore.signal()
}

task.resume()
semaphore.wait()