<?php
/**
 * 发起http post请求(REST API), 并获取REST请求的结果
 * @param string $url
 * @param string $param
 * @return - http response body if succeeds, else false.
 */
function request_post($url = '', $param = '')
{
    if (empty($url) || empty($param)) {
        return false;
    }

    $postUrl = $url;
    $curlPost = $param;
    // 初始化curl
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $postUrl);
    curl_setopt($curl, CURLOPT_HEADER, 0);
    // 要求结果为字符串且输出到屏幕上
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    // post提交方式
    curl_setopt($curl, CURLOPT_POST, 1);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $curlPost);
    // 运行curl
    $data = curl_exec($curl);
    curl_close($curl);

    return $data;
}

$token = '#####调用鉴权接口获取的token#####';
$url = 'https://aip.baidubce.com/rest/2.0/ocr/v1/bankcard?access_token=' . $token;
$img = file_get_contents('########本地文件##########');
$img = base64_encode($img);
$bodys = array(
    "image" => $img
);
$res = request_post($url, $bodys);
var_dump($res);

/*
 * Copyright (C) 2017 Baidu, Inc. All Rights Reserved.
 */
package com.baidu.ai.aip.ocr;

import com.baidu.ai.aip.utils.Base64Util;
import com.baidu.ai.aip.utils.FileUtil;
import com.baidu.ai.aip.utils.HttpUtil;

import java.net.URLEncoder;

/**
 * 银行卡识别
 */
public class Bankcard {

    /**
     * 重要提示代码中所需工具类
     * FileUtil,Base64Util,HttpUtil,GsonUtils请从
     * https://ai.baidu.com/file/658A35ABAB2D404FBF903F64D47C1F72
     * https://ai.baidu.com/file/C8D81F3301E24D2892968F09AE1AD6E2
     * https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3
     * https://ai.baidu.com/file/470B3ACCA3FE43788B5A963BF0B625F3
     * 下载
     */
    public static void main(String[] args) {
        // 银行卡识别url
        String bankcardIdentificate = "https://aip.baidubce.com/rest/2.0/ocr/v1/bankcard";
        // 本地图片路径
        String filePath = "#####本地文件路径#####";
        try {
            byte[] imgData = FileUtil.readFileByBytes(filePath);
            String imgStr = Base64Util.encode(imgData);
            String params = URLEncoder.encode("image", "UTF-8") + "=" + URLEncoder.encode(imgStr, "UTF-8");
            /**
             * 线上环境access_token有过期时间， 客户端可自行缓存，过期后重新获取。
             */
            String accessToken = "#####调用鉴权接口获取的token#####";
            String result = HttpUtil.post(bankcardIdentificate, accessToken, params);
            System.out.println(result);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

# coding:utf-8
import urllib, urllib2, base64


access_token = '#####调用鉴权接口获取的token#####'
url = 'https://aip.baidubce.com/rest/2.0/ocr/v1/bankcard?access_token=' + access_token
f = open(r'########本地文件#######', 'rb')  # 二进制方式打开图文件
img = base64.b64encode(f.read())
params = {"image": img}
params = urllib.urlencode(params)
request = urllib2.Request(url, params)
request.add_header('Content-Type', 'application/x-www-form-urlencoded')
response = urllib2.urlopen(request)
content = response.read()
if (content):
    print(content)

#include <iostream>
#include <curl/curl.h>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <boost/date_time.hpp>
#include "bankcard.h"
// libcurl库下载链接：https://curl.haxx.se/download.html
// jsoncpp库下载链接：https://github.com/open-source-parsers/jsoncpp/
// 银行卡ocr接口url
const static std::string bank_card_url = "https://aip.baidubce.com/rest/2.0/ocr/v1/bankcard";
static std::string bank_card_result;
/**
 * curl发送http请求调用的回调函数，回调函数中对返回的json格式的body进行了解析，解析结果储存在全局的静态变量bank_card_result当中
 * @param 参数定义见libcurl文档
 * @return 返回值定义见libcurl文档
 */
static size_t callback(void *ptr, size_t size, size_t nmemb, void *stream) {
    // 获取到的body存放在参数ptr中，先将其转换为string格式
    bank_card_result = std::string((char *) ptr, size * nmemb);
    return size * nmemb;
}
/**
 * 调用银行卡ocr接口，返回json格式的结果，具体格式解析见百度大脑文档
 * @param json_result 以string格式返回的json格式的结果
 * @param image_base64 以string格式传递的base64编码的图像数据（注：base64数据不包含格式信息（即不包含data:image/jpeg;base64））
 * @param access_token 以string格式传入的access token数据，access token获取方式见access_token获取相关文档及代码
 * @return 调用成功返回0，发生错误返回其他错误码
 */
int bank_card_recognize(std::string &json_result, const std::string &image_base64,
                                   const std::string &access_token){
    std::string url = bank_card_url + "?access_token=" + access_token;
    CURL *curl = NULL;
    CURLcode result_code;
    int is_success;
    curl = curl_easy_init();
    if (curl) {
        // 使用libcurl post数据：设定待post的url，将image以表单的形式填入body
        curl_easy_setopt(curl, CURLOPT_URL, url.data());
        curl_easy_setopt(curl, CURLOPT_POST, 1);
        curl_httppost *post = NULL;
        curl_httppost *last = NULL;
        curl_formadd(&post, &last, CURLFORM_COPYNAME, "image", CURLFORM_COPYCONTENTS, image_base64.data(),
                     CURLFORM_END);
        curl_easy_setopt(curl, CURLOPT_HTTPPOST, post);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, callback);
        result_code = curl_easy_perform(curl);
        if (result_code != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s
",
                    curl_easy_strerror(result_code));
            is_success = 1;
            return is_success;
        }
        json_result = bank_card_result;
        curl_easy_cleanup(curl);
        is_success = 0;
    } else {
        fprintf(stderr, "curl_easy_init() failed.");
        is_success = 1;
    }
    return is_success;
}

using System;
using System.IO;
using System.Net;
using System.Text;
using System.Web;

namespace com.baidu.ai
{
	public class BankCard
	{
		// 银行卡识别
		public static string bankCard()
		{
			string token = "#####调用鉴权接口获取的token#####";
			string strbaser64 = FileUtils.getFileBase64("/work/ai/images/ocr/bankcard.jpeg"); // 图片的base64编码
			string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/bankcard?access_token=" + token;
			Encoding encoding = Encoding.Default;
			HttpWebRequest request = (HttpWebRequest)WebRequest.Create(host);
			request.Method = "post";
			request.ContentType = "application/x-www-form-urlencoded";
			request.KeepAlive = true;
			String str = "image=" + HttpUtility.UrlEncode(strbaser64);
			byte[] buffer = encoding.GetBytes(str);
			request.ContentLength = buffer.Length;
			request.GetRequestStream().Write(buffer, 0, buffer.Length);
			HttpWebResponse response = (HttpWebResponse)request.GetResponse();
			StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
			string result = reader.ReadToEnd();
			Console.WriteLine("银行卡识别:");
			Console.WriteLine(result);
			return result;
		}
	}
}