Question

我想使用HttpClient来调用服务（localhost / png /'imageWithBase64'）这将从变量'result'返回我的回答。 Ocrad.js用图像读取基本的简单文本。

我有3个问题： - 如何将Java发送到服务的base64编码？ - 是否将此id粘贴到img.src将正常工作？ - 结果以JSON或HTML格式返回？

目前，我在Java中遇到了一个错误（我无法将整个String作为参数id发送到服务中）

java.lang.IllegalArgumentException: Illegal character in path

Code Java：

        File file = new File(getClass().getClassLoader().getResource("test.png").getFile());

        String encodedFile = Base64.encode(FileUtils.readFileToByteArray(file));

        String url = "http://127.0.0.1:3000/png/"+encodedFile;

        HttpClient client = HttpClientBuilder.create().build();
        HttpGet request = new HttpGet(url);

        HttpResponse response = client.execute(request);

        BufferedReader rd = new BufferedReader(
                new InputStreamReader(response.getEntity().getContent()));

        StringBuffer result = new StringBuffer();
        String line;
        while ((line = rd.readLine()) != null) {
            result.append(line);
        }

        System.out.println(result.toString());

我的Java依赖关系：

 <dependencies>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-io</artifactId>
            <version>1.3.2</version>
        </dependency>
    </dependencies>

带有nodeJS的服务器：

var express = require('express');
var OCRAD = require('ocrad.js');
var Canvas = require('canvas');
var Image = Canvas.Image;

var app = express();

app.get('/png/:id', function(req, res) {

var img = new Image();
img.src = 'data:image/png;base64,'+req.params.id; 
var canvas = new Canvas(img.width, img.height);
var ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0, img.width, img.height);
var result = OCRAD(canvas);
res.send({result:result});
});

app.listen(3000);
console.log('Listening on port 3000...');

如何正确将编码的base64映像发送到nodeJS并在Java中获取响应

0 个答案: