您好，这个是代码问题，可以参考下{

    "msgtype": "image",

    "image": {

        "base64": "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",

        "md5": "1bf0d144aa88eee8e49462fd2b644b06"

    }

}

纯欠骂

/**PHP
 * 实际测试中发现部分格式企微识别有误 也可能是图片本身问题 没详尽研究
 * 未通过  PNG image data, 1500 x 800, 8-bit gray+alpha, non-interlaced
 * 通过   JPEG image data, JFIF standard 1.01
 */

$image = 'xx.jpeg';

$base64 = base64EncodeImage($image);
$md5 = md5_file($image);
function base64EncodeImage($image_file)
{
    $image_data = fread(fopen($image_file, 'rb'), filesize($image_file));
    return base64_encode($image_data);
}

md5 和base64 生成及请求

imgkit.from_string(mail_content, 'downloads/111.png' , options={"encoding": "UTF-8"})

f = open('downloads/111.png', 'br')

fcont = f.read()

m2 = hashlib.md5(fcont)

md5_val = m2.hexdigest()

base64_data=str(base64.b64encode(fcont),encoding='utf-8')

r=requests.post(url,data={"msgtype":"image","image":{"base64":base64_data,"md5":md5_val}})

把base64图片内容里的换行符清空了replaceAll("\r|\n", "")

检查下base64中 \r\n的。会影响校验

// 这是java代码可以直接用的参考

import org.apache.commons.codec.digest.DigestUtils;// 重要依赖

@Test

    public void Test2() throws Exception {

        String purl = "图片url地址";

        URL url = new URL(purl);

        // 打开连接

        URLConnection connection = url.openConnection();

        try (

                // 获取输入流

                InputStream inputStream = connection.getInputStream();

                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

        ){

            StreamUtils.copy(inputStream, outputStream);

            // 发送post请求

            String rurl = "https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=机器人key";

            // 设置请求头

            HttpHeaders headers = new HttpHeaders();

            headers.setContentType(MediaType.APPLICATION_JSON);

            // 创建请求体

            Map<String, Object> image = new HashMap<>();

//关键步骤

            image.put("base64", Base64.getEncoder().encodeToString(outputStream.toByteArray()).replaceAll("[\r\n]", ""));

            image.put("md5", DigestUtils.md5Hex(outputStream.toByteArray()));

            Map<String, Object> requestBody = new HashMap<>();

            requestBody.put("msgtype", "image");

            requestBody.put("image", image);

            // 创建 HttpEntity 对象,包含请求头和请求体

            HttpEntity<Map<String, Object>> entity = new HttpEntity<>(requestBody, headers);

            // 发送 POST 请求

            ResponseEntity<String> response = restTemplate.postForEntity(rurl, entity, String.class);

            // 打印响应信息

            System.out.println("Response Status Code: " + response.getStatusCode());

            System.out.println("Response Body: " + response.getBody());

        } catch (RestClientException e) {

            throw new RuntimeException(e);

        }

    }

import org.apache.commons.codec.digest.DigestUtils;

byte[] bytes = FileUtils.readFileToByteArray(new File("D:\\fsdownload\\bb.jpg"));
String md5 = DigestUtils.md5Hex(bytes);

//java 的方式

java 版代码，【坑点】转base64后要把\r\n替换掉，实测有效

URL url = new URL(sendMessageContent.getImage());
byte[] imageBytes = IoUtil.readBytes(url.openStream());

String imageBase64Str = Base64.getEncoder().encodeToString(imageBytes)
        .replaceAll("[\r\n]", "");

String md5 = MD5.create().digestHex(imageBytes);

markdown都不支持图片链接，什么时候支持啊，太👎了