Question

我正在开发一个关于下载文件的html web应用程序。首先我点击下载按钮，浏览器显示一个提示，此时，它已经向我的服务器发送了一个请求。我得到如下所示的标题，但浏览器没有正确显示文件名。

===========================================
host: 192.168.0.101
remote_addr: 192.168.0.102
x-real-ip: 192.168.0.102
x-forwarded-for: 192.168.0.102
connection: close
cookie: JSESSIONID=DECD58D9A660FBA200BF7F920F9B7ACF
user-agent: Dalvik/2.1.0 (Linux; U; Android 6.0.1; vivo Y55 Build/MMB29M)
accept-encoding: gzip
===========================================
06-15 09:34:02.251 DEBUG 41911 --- [nio-7016-exec-6] jdbc.core.JdbcTemplate                   : Executing prepared SQL query
06-15 09:34:02.251 DEBUG 41911 --- [nio-7016-exec-6] jdbc.core.JdbcTemplate                   : Executing prepared SQL statement [select * from file where id = ?]

然后我继续下载文件，它发送请求并真正下载文件。这是标题。

===========================================
host: 192.168.0.101
remote_addr: 192.168.0.102
x-real-ip: 192.168.0.102
x-forwarded-for: 192.168.0.102
connection: close
cookie: JSESSIONID=DECD58D9A660FBA200BF7F920F9B7ACF
user-agent: AndroidDownloadManager/6.0.1 (Linux; U; Android 6.0.1; vivo Y55 Build/MMB29M)
accept-encoding: identity
===========================================
06-15 09:36:26.231 DEBUG 41911 --- [nio-7016-exec-5] jdbc.core.JdbcTemplate                   : Executing prepared SQL query
06-15 09:36:26.231 DEBUG 41911 --- [nio-7016-exec-5] jdbc.core.JdbcTemplate                   : Executing prepared SQL statement [select * from file where id = ?]

在Android chrome或ios safari中不会发生此问题。

我正在使用api服务器的nginx和代理请求，这里是配置和java代码。

nginx的

server {
    listen       9900;
    server_name  localhost;

    location / {
        root   /Users/jiangxingshang/Documents/workspace/WebStorm/gs-logistics-mobile/dist;
        index  index.html;
        try_files $uri $uri/ /index.html;
    }

    location ~ ^/api/ {
        proxy_set_header Host $host;
        proxy_set_header Remote_Addr $remote_addr;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://localhost:7016;
    }
}

弹簧控制器

@GetMapping(value = "file/{id}")
void download(@PathVariable String id, String disposition, HttpServletResponse response, HttpServletRequest request) throws IOException {
    Enumeration<String> headers = request.getHeaderNames();
    System.out.println("===========================================");
    while (headers.hasMoreElements()) {
        String name = headers.nextElement();
        String value = request.getHeader(name);
        System.out.println(name + ": " + value);
    }
    System.out.println("===========================================");
    FileObject fileObject = fileObjectService.find(id);
    if (fileObject == null) {
        response.setStatus(404);
        response.getWriter().print("File not found.");
    } else {
        fileObject.download(disposition, response);
    }
}

FileObject javabean

    public void download(String disposition, HttpServletResponse response) throws IOException {
    if (getDeleted() == 1) {
        fileNotFound(response);
        return;
    }
    disposition = StringUtils.defaultIfBlank(disposition, "attachment");
    String filePath = AccessTokenFactory.findFactory().buildToken(getPath()).getPath();
    FileSystemResource resource = new FileSystemResource(filePath);
    if (resource.exists()) {
        if ("attachment".equals(disposition)) {
            response.setContentType("application/octet-stream");
        } else {
            response.setContentType(Files.probeContentType(resource.getFile().toPath()));
        }
        response.setHeader("Content-Length", resource.contentLength() + "");
        String name = URLEncoder.encode(getName(),"UTF-8");
        response.setHeader("Content-Disposition", String.format("%s;filename=\"%s\"", disposition, name));
        try (InputStream is = resource.getInputStream()) {
            IOUtils.copy(is, response.getOutputStream());
        }
    } else {
        fileNotFound(response);
    }
}

在android浏览器中发出两个请求下载文件

0 个答案: