Java 用于Spring引导的工具字节服务
我想使用SpringBootRESTAPI在Angular中实现视频播放器。我可以播放视频,但我不能进行视频搜索。每次我使用Chrome或Edge时,视频都会一次又一次地启动 我尝试了这个端点:Java 用于Spring引导的工具字节服务,java,angular,spring,spring-boot,spring-mvc,Java,Angular,Spring,Spring Boot,Spring Mvc,我想使用SpringBootRESTAPI在Angular中实现视频播放器。我可以播放视频,但我不能进行视频搜索。每次我使用Chrome或Edge时,视频都会一次又一次地启动 我尝试了这个端点: @RequestMapping(value = "/play_video/{video_id}", method = RequestMethod.GET) @ResponseBody public ResponseEntity<byte[]> getPreview
@RequestMapping(value = "/play_video/{video_id}", method = RequestMethod.GET)
@ResponseBody public ResponseEntity<byte[]> getPreview1(@PathVariable("video_id") String video_id, HttpServletResponse response) {
ResponseEntity<byte[]> result = null;
try {
String file = "/opt/videos/" + video_id + ".mp4";
Path path = Paths.get(file);
byte[] image = Files.readAllBytes(path);
response.setStatus(HttpStatus.OK.value());
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
headers.setContentLength(image.length);
result = new ResponseEntity<byte[]>(image, headers, HttpStatus.OK);
} catch (java.nio.file.NoSuchFileException e) {
response.setStatus(HttpStatus.NOT_FOUND.value());
} catch (Exception e) {
response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
}
return result;
}
@RequestMapping(value=“/play\u video/{video\u id}”,method=RequestMethod.GET)
@ResponseBody public ResponseEntity getPreview1(@PathVariable(“video_id”)字符串video_id,HttpServletResponse){
ResponseEntity结果=空;
试一试{
字符串文件=“/opt/videos/”+video_id+”.mp4”;
Path Path=Path.get(文件);
byte[]image=Files.readAllBytes(路径);
response.setStatus(HttpStatus.OK.value());
HttpHeaders=新的HttpHeaders();
headers.setContentType(MediaType.APPLICATION\u OCTET\u STREAM);
headers.setContentLength(image.length);
结果=新响应性(图像、标题、HttpStatus.OK);
}catch(java.nio.file.NoSuchFileException){
response.setStatus(HttpStatus.NOT_FOUND.value());
}捕获(例外e){
response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
}
返回结果;
}
我发现这篇文章提供了一些IDE:
但目前它不起作用。当我尝试移动位置时,视频从一开始就再次播放
我使用这个播放器:
我已将其配置为:
<div class="media">
<div
class="class-video mr-3 mb-1"
plyr
[plyrPlaysInline]="true"
[plyrSources]="gymClass.video"
(plyrInit)="player = $event"
(plyrPlay)="played($event)">
</div>
<div class="media-body">
{{ gymClass.description }}
</div>
</div>
{{gymClass.description}}
您知道如何解决此问题吗?第一种解决方案:使用FileSystemResource
FileSystemResource在内部处理字节范围标头支持,读取和写入适当的标头
这种方法有两个问题
FileInputStream
读取文件。这适用于小文件,但不适用于通过字节范围请求提供服务的大文件FileInputStream
将从头开始读取文件,并丢弃不需要的内容,直到它重新记录请求的开始偏移量。这可能会导致较大文件的速度减慢
“application/json”
设置为“Content Type”
响应头。因此,我提供了自己的“内容类型”
标题
RandomAccessFile
,但是StreamingResponseBody
而不是HttpServletResponse
以及html:
<div
#plyr
plyr
[plyrPlaysInline]="false"
[plyrSources]="videoSources"
></div>
如果您在Chrome中使用
元素,则仅当端点通过以a表示满足请求并以响应进行响应来实现部分内容请求时,seeking才起作用。角度代码是什么样子的?帖子已更新。我已更新我的答案。我检查过了,所有三个java控制器都在工作,我也可以跳过视频。如果我们有数百个客户端,哪一个解决方案会消耗更少的资源?2。或3。您还可以查看spring。springreactive允许您以异步方式处理函数执行。这种方法适用于异步文件通道
,它使用本机函数读取文件(长句柄、长地址、整数、长偏移量、长重叠)
。这里的偏移量是正在读取的文件中的位置。FileInputStream
的情况并非如此,它使用的是readBytes(byte b[],int off,int len)
,其中偏移量是目标缓冲区中的位置。在azure core中,已经实现了桥接电抗器(spring reactive使用的反应库)和异步文件通道
。如果你想这样做,你可以在这里找到我使用这个播放器的文档:
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class Stream {
@GetMapping(value = "/play_video/{video_id}")
@ResponseBody
public void stream(
@PathVariable("video_id") String video_id,
@RequestHeader(value = "Range", required = false) String rangeHeader,
HttpServletResponse response) {
try {
OutputStream os = response.getOutputStream();
long rangeStart = 0;
long rangeEnd;
String filePathString = "/opt/videos/" + video_id + ".mp4";
Path filePath = Paths.get(filePathString);
Long fileSize = Files.size(filePath);
byte[] buffer = new byte[1024];
RandomAccessFile file = new RandomAccessFile(filePathString, "r");
try (file) {
if (rangeHeader == null) {
response.setHeader("Content-Type", "video/mp4");
response.setHeader("Content-Length", fileSize.toString());
response.setStatus(HttpStatus.OK.value());
long pos = rangeStart;
file.seek(pos);
while (pos < fileSize - 1) {
file.read(buffer);
os.write(buffer);
pos += buffer.length;
}
os.flush();
return;
}
String[] ranges = rangeHeader.split("-");
rangeStart = Long.parseLong(ranges[0].substring(6));
if (ranges.length > 1) {
rangeEnd = Long.parseLong(ranges[1]);
} else {
rangeEnd = fileSize - 1;
}
if (fileSize < rangeEnd) {
rangeEnd = fileSize - 1;
}
String contentLength = String.valueOf((rangeEnd - rangeStart) + 1);
response.setHeader("Content-Type", "video/mp4");
response.setHeader("Content-Length", contentLength);
response.setHeader("Accept-Ranges", "bytes");
response.setHeader("Content-Range", "bytes" + " " + rangeStart + "-" + rangeEnd + "/" + fileSize);
response.setStatus(HttpStatus.PARTIAL_CONTENT.value());
long pos = rangeStart;
file.seek(pos);
while (pos < rangeEnd) {
file.read(buffer);
os.write(buffer);
pos += buffer.length;
}
os.flush();
}
} catch (FileNotFoundException e) {
response.setStatus(HttpStatus.NOT_FOUND.value());
} catch (IOException e) {
response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
}
}
}
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBody;
@Controller
public class Stream2 {
@GetMapping(value = "/play_video/{video_id}")
@ResponseBody
public ResponseEntity<StreamingResponseBody> stream(
@PathVariable("video_id") String video_id,
@RequestHeader(value = "Range", required = false) String rangeHeader) {
try {
StreamingResponseBody responseStream;
String filePathString = "/opt/videos/" + video_id + ".mp4";
Path filePath = Paths.get(filePathString);
Long fileSize = Files.size(filePath);
byte[] buffer = new byte[1024];
final HttpHeaders responseHeaders = new HttpHeaders();
if (rangeHeader == null) {
responseHeaders.add("Content-Type", "video/mp4");
responseHeaders.add("Content-Length", fileSize.toString());
responseStream = os -> {
RandomAccessFile file = new RandomAccessFile(filePathString, "r");
try (file) {
long pos = 0;
file.seek(pos);
while (pos < fileSize - 1) {
file.read(buffer);
os.write(buffer);
pos += buffer.length;
}
os.flush();
} catch (Exception e) {}
};
return new ResponseEntity<>(responseStream, responseHeaders, HttpStatus.OK);
}
String[] ranges = rangeHeader.split("-");
Long rangeStart = Long.parseLong(ranges[0].substring(6));
Long rangeEnd;
if (ranges.length > 1) {
rangeEnd = Long.parseLong(ranges[1]);
} else {
rangeEnd = fileSize - 1;
}
if (fileSize < rangeEnd) {
rangeEnd = fileSize - 1;
}
String contentLength = String.valueOf((rangeEnd - rangeStart) + 1);
responseHeaders.add("Content-Type", "video/mp4");
responseHeaders.add("Content-Length", contentLength);
responseHeaders.add("Accept-Ranges", "bytes");
responseHeaders.add("Content-Range", "bytes" + " " + rangeStart + "-" + rangeEnd + "/" + fileSize);
final Long _rangeEnd = rangeEnd;
responseStream = os -> {
RandomAccessFile file = new RandomAccessFile(filePathString, "r");
try (file) {
long pos = rangeStart;
file.seek(pos);
while (pos < _rangeEnd) {
file.read(buffer);
os.write(buffer);
pos += buffer.length;
}
os.flush();
} catch (Exception e) {}
};
return new ResponseEntity<>(responseStream, responseHeaders, HttpStatus.PARTIAL_CONTENT);
} catch (FileNotFoundException e) {
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
} catch (IOException e) {
return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
}
}
}
export class AppComponent implements OnInit {
videoSources: Plyr.Source[];
ngOnInit(): void {
const fileName = 'sample';
this.playVideoFile(fileName);
}
playVideoFile(fileName: string) {
this.videoSources = [
{
src: `http://localhost:8080/play_video/${fileName}`,
},
];
}
}
<div
#plyr
plyr
[plyrPlaysInline]="false"
[plyrSources]="videoSources"
></div>