上传图片Google Cloud Endpoints时出错-Java 学习之路

我正在尝试使用Google Cloud Endpoints将图像文件上传到Blobstore . 下面的代码成功地将图像存储在Blobstore中，但是没有在数据存储区中创建实体“图像”，因此它不会将图像引用添加到MyUser实体（我使用Objectify将实体存储在数据存储区中） .

另外，当我上传图像时，我得到“404 NOT_FOUND”错误作为响应...但图像正确存储在Blobstore中 .

<html>
<head>
    <meta http-equiv="content-type" content="text/html;charset=utf-8">
        <title>404 NOT_FOUND</title>
    </head>
    <body text=#000000 bgcolor=#ffffff>
        <h1>Error: NOT_FOUND</h1>
    </body>
</html>

My Endpoints Code

@Api(
        name = "imageManager"
)
public class ImageManager {

    BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();

    @ApiMethod(name = "urlToUpload", httpMethod = "get")
    public Image urlToUpload(){
        Image image = new Image();
        image.url = blobstoreService.createUploadUrl("/imageManager/upload");

        return image;
    }

这是上传处理程序：

@ApiMethod(name = "upload", httpMethod = "post")
    public Image upload(HttpServletRequest httpServletRequest) throws BadRequestException, NotFoundException, UnauthorizedException {
        String op = httpServletRequest.getParameter("op");
        if(op == null) throw new BadRequestException("op is null");

        Image image = null;

        if(op.equalsTo("registerUser") image = this.uploadRegisterUser(httpServletRequest);
        return image;
    }

UploadRegisterUser：

private Image uploadRegisterUser(HttpServletRequest httpServletRequest) throws NotFoundException {

        Long userId = Long.parseLong(httpServletRequest.getParameter("userId"));

        MyUser user = ofy().load().type(MyUser.class).filter("id",userId).first().now();

        if(user == null) throw new NotFoundException("User not found");

        Ref<Image> imageRef = this.saveImage(httpServletRequest, wUser, null);

        user.profileImage = imageRef;
        ofy().save().entity(wUser).now();

        return imageRef.getValue();
    }

保存图片：

private Ref<Image> saveImage(HttpServletRequest httpServletRequest, MyUser user, String label){

        List<BlobKey> blobs = blobstoreService.getUploads(httpServletRequest).get("file");
        Image image = new Image();
        image.key = blobs.get(0).getKeyString();
        image.user = Ref.create(user);
        image.date = new Date();
        image.label = label;

        return Ref.create(ofy().save().entity(image).now());
    }

哪里我错了？提前致谢 .

1 回答

我认为根本不会调用你的处理程序 . Cloud endpoints 路径始终位于/ _ah / api / ....之后 . 因此，您的上传处理程序根本未映射到blobstore上载路径 . 您必须创建一个单独的servlet，该servlet映射到/ upload并将其添加到Web.xml . 至少到目前为止这是我的解决方案 .

创建一个像这样的独立servlet：

public class UploadgimageServlet extends HttpServlet {


private BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();

    public void doPost(HttpServletRequest req, HttpServletResponse res)
        throws ServletException, IOException {

        Map<String, BlobKey> blobs = blobstoreService.getUploadedBlobs(req);
        BlobKey blobKey = blobs.get(“file");

        if (blobKey == null) {
            res.sendRedirect("/");
        } else {
            res.sendRedirect("http://localhost:8888/getimage?blob-key=" + blobKey.getKeyString());
        }
    }
}

将这些添加到您的web.xml

<servlet>
     <servlet-name>Uploadgimage</servlet-name>
    <servlet-class>com.yourcomp.UploadgimageServlet</servlet-class>
 </servlet>

 <servlet-mapping>
    <servlet-name>Uploadgimage</servlet-name>
    <url-pattern>/imageManager/upload</url-pattern>  //Based on your original URL
  </servlet-mapping>

祝好运！

回复于 2024-05-03T06:18:33+08:00

上传图片Google Cloud Endpoints时出错

1 回答

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