Tika Server上下文路径管理：基于Spring Boot的定制化方案

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.5</version> <!-- 或更高版本 -->
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>tika-custom-service</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>tika-custom-service</name>
    <description>Custom Tika Service with Context Path</description>

    <properties>
        <java.version>17</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- Apache Tika Parsers -->
        <dependency>
            <groupId>org.apache.tika</groupId>
            <artifactId>tika-parsers</artifactId>
            <version>2.9.2</version> <!-- 请使用最新稳定版本 -->
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

server.servlet.context-path=/tika-server
server.port=8080

server:
  port: 8080
  servlet:
    context-path: /tika-server

import org.apache.tika.Tika;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;

@RestController
@RequestMapping("/api/tika") // 控制器级别的路径，可根据需要调整
public class TikaServiceController {

    private final Tika tika = new Tika(); // Tika实例通常是线程安全的，可以重用

    /**
     * 检测上传文件的内容类型
     * @param file 待检测的Multipart文件
     * @return 文件的MIME类型
     * @throws IOException 如果文件处理失败
     */
    @PostMapping(value = "/detect-content-type", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public ResponseEntity<String> detectContentType(@RequestParam("file") MultipartFile file) throws IOException {
        if (file.isEmpty()) {
            return ResponseEntity.badRequest().body("No file provided for content type detection.");
        }
        try {
            // 使用Tika检测文件的内容类型
            String detectedContentType = tika.detect(file.getInputStream());
            return ResponseEntity.ok(detectedContentType);
        } catch (IOException e) {
            // 记录错误并返回适当的错误响应
            System.err.println("Error detecting content type: " + e.getMessage());
            return ResponseEntity.internalServerError().body("Failed to detect content type: " + e.getMessage());
        }
    }

    // 还可以添加其他Tika功能，例如提取文本或元数据
    // @PostMapping(value = "/extract-text", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    // public ResponseEntity<String> extractText(@RequestParam("file") MultipartFile file) throws Exception {
    //     if (file.isEmpty()) {
    //         return ResponseEntity.badRequest().body("No file provided for text extraction.");
    //     }
    //     try (InputStream stream = file.getInputStream()) {
    //         String extractedText = new Tika().parseToString(stream);
    //         return ResponseEntity.ok(extractedText);
    //     } catch (Exception e) {
    //         System.err.println("Error extracting text: " + e.getMessage());
    //         return ResponseEntity.internalServerError().body("Failed to extract text: " + e.getMessage());
    //     }
    // }
}

# 使用官方OpenJ9作为基础镜像，体积更小
FROM eclipse-temurin:17-jre-alpine

# 设置工作目录
WORKDIR /app

# 将构建好的JAR文件复制到容器中
COPY target/tika-custom-service-0.0.1-SNAPSHOT.jar app.jar

# 暴露Spring Boot应用默认端口
EXPOSE 8080

# 启动应用
ENTRYPOINT ["java", "-jar", "app.jar"]