Question

我正在使用blobstore API将图片上传到我的应用。这在本地工作正常，这意味着图像已成功上传，回调也可以。但是当我将multipart请求发送到createUploadUrl从服务器返回的uploadurl时，它总是给我404找不到错误。是否有可能没有为我的应用启用blobstore？为什么我无法在Google云控制台中看到我的blobstore？我必须到这里https://appengine.google.com/blobstore/看看我的斑点。

应用程序端的代码：doPost处理回调，doGet返回uploadUrl（两者都在同一个servlet / _ah / admin / new_image中）。永远不会触发doPost（回调处理程序代码），也不会上传图像。

@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp)
          throws IOException {

    Map<String, List<BlobKey>> blobs = blobstoreService.getUploads(req);
    List<BlobKey> blobKeys = blobs.get("image");
    ImagesService imagesService = ImagesServiceFactory.getImagesService();
    String imageUrl = imagesService.getServingUrl(ServingUrlOptions.Builder.withBlobKey(blobKeys.get(0)));
    Long businessId = Long.parseLong(req.getParameter("business_id"));
    String linkUrl = req.getParameter("link_url");
    Long id = Long.parseLong(req.getParameter("advertisement_id"));
    AdvertisementManager.addNewAdvertisement(id, imageUrl, linkUrl, businessId);
}

@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp)
          throws IOException {

    PrintWriter out = resp.getWriter();
    resp.setContentType( "text/html" ); 
    String uploadUrl = blobstoreService.createUploadUrl("");
    Logger.getLogger("").log(Level.WARNING,uploadUrl);
    out.print(uploadUrl);
}

上传图片的代码：首先发送获取请求以获取上传网址，然后发送带有图片文件的多部分请求

public static void upload(Long id, File file, String linkUrl, Long businessId){
    HttpClient httpclientget = HttpClientBuilder.create().build();
    HttpGet httpget = new HttpGet("http://app-url/_ah/admin/new_image"); 

    String uploadUrl = "";

    try {
        HttpResponse responseGet = httpclientget.execute(httpget);
        uploadUrl = EntityUtils.toString(responseGet.getEntity());
        Logger.getLogger("").log(Level.WARNING,uploadUrl);
    } catch (Exception e) {
        e.printStackTrace();
    }       
    HttpClient httpclient = HttpClientBuilder.create().build();
    HttpPost httpPost = null;
    String uri=null;

    try {
        URIBuilder builder = new URIBuilder(uploadUrl);
        builder.setParameter("advertisement_id", id.toString());
        builder.setParameter("link_url", linkUrl);
        builder.setParameter("business_id", businessId.toString());
        uri=builder.build().toString();
    } catch (URISyntaxException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    httpPost = new HttpPost(uri);
    System.out.println(uri);
    if (file!=null){
        MultipartEntityBuilder reqEntity = MultipartEntityBuilder.create();
        reqEntity.addBinaryBody("image", file, ContentType.create("image/jpeg"), "ad.jpg");

        httpPost.setEntity(reqEntity.build());
    }
    try {
        HttpResponse response = httpclient.execute(httpPost);
        System.out.println(response);
    } catch (Exception e){
        System.out.println(e.getMessage());
        e.printStackTrace();
    }
}

Answer 1

AFAIK / _ah / *空间是为内部GAE服务保留的，您不应该使用它。您获得404的原因可能是Google阻止您部署该servlet，请尝试更改URL。

服务器上找不到Google App Engine blobstore createUploadUrl 404

1 个答案: