照片无法正确上传GCS

照片无法正确上传GCS

本文介绍了照片无法正确上传GCS App Engine的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在使用我的upload.java servlet将.jpg存储到GCS。



我使用GCS客户端库而不是Google Cloud Storage API。但我没有找到任何样品上传照片(doPost方法),所以我的代码无法正常工作......



发送成功(我可以看到我的照片在GCS上的尺寸为465.24KB),但是当我尝试查看这一个时,我不能:



upload.java servlet
public void doPost(HttpServletRequest请求,HttpServletResponse响应)
抛出IOException异常{

  //从输入流读取文件内容
GcsService gcsService = GcsServiceFactory.createGcsService();

GcsFilename filename = new GcsFilename(BUCKETNAME,FILENAME);


GcsFileOptions options = new GcsFileOptions.Builder()
.mimeType(image / jpeg)
.acl(public-read)
.addUserMetadata(myfield1,我的字段值)
.build();

GcsOutputChannel writeChannel = gcsService.createOrReplace(filename,options);
InputStream is = request.getInputStream();

尝试{
copy(is,Channels.newOutputStream(writeChannel));
} finally {
writeChannel.close();
is.close();



$ b private void copy(InputStream input,OutputStream output)throws IOException {
byte [] buffer = new byte [256];
int bytesRead = input.read(buffer);
while(bytesRead!= -1){
output.write(buffer,0,bytesRead);
bytesRead = input.read(buffer);


$


android代码(发送照片)

  HttpPost httppost = new HttpPost(adress.appengine.com/upload); 


//在文件上保存文件qui contient la photo que l'on vient de prendre(可通过儿子路径访问)
文件f =新文件(AccueilActivity.fileUri。的getPath());

//关于FileBody(Contenu de notrerequêtehttp POST)contenant notre photo
FileBody fileBody = new FileBody(f);

// Permet decréerunerequêteavec plusieurs partie
MultipartEntity reqEntity = new MultipartEntity();

//关于照片avec le motclé文件。
reqEntity.addPart(file,fileBody);

//设置为notrerequêteHTTP
httppost.setEntity(reqEntity);

//执行NOT POST请求HTTP Post,et appele du coup automatiquement le servlet上传,
//等会议响应。
HttpResponse response = httpClient.execute(httppost);
$ b $ // //使用HTTP协议(Tout sauf le coderéponse)
HttpEntity urlEntity = response.getEntity();

提前致谢!

解决方案

我终于找到(并且由我自己)解决我的问题!我为此感到自豪= D



Android的代码:

 //动作àréaliseren fond 
保护字符串doInBackground(String ... params){

//不需要的HTTP
HttpClient httpClient = new DefaultHttpClient();

//关于构造notre adresse Postgrâceàce que l'on vient derécupérer
HttpPost httppost = new HttpPost(http://your_id.appspot.com/upload);

//在文件上保存文件qui contient la photo que l'on vient de prendre(
File f = new File(AccueilActivity.fileUri.getPath()) ;

// Etlàon essaie!
尝试{

MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create();
entityBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
entityBuilder.addBinaryBody(Photo_a_uploader,f);
entityBuilder.addTextBody(Type,Type que l'utilisateur a choisi);

httppost.setEntity(entityBuilder.build());
HttpResponse response = httpClient.execute(httppost);

$ b} catch(ClientProtocolException e){
//在tombe dans le catch上,设置notre变量à2.
e.printStackTrace();

} catch(IOException e){
//在tombe dans le catch上,设置notre变量à2.
e.printStackTrace();
}

代码App Engine

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

//从输入流中读取文件内容
GcsService gcsService = GcsServiceFactory.createGcsService();

GcsFilename filename = new GcsFilename(BUCKETNAME,FILENAME);

GcsFileOptions options = new GcsFileOptions.Builder()
.mimeType(image / jpg)
.acl(public-read)
.addUserMetadata myfield1,我的字段值)
.build();

GcsOutputChannel writeChannel = gcsService.createOrReplace(filename,options);

ServletFileUpload upload = new ServletFileUpload();

res.setContentType(text / plain);

尝试{
FileItemIterator iterator = upload.getItemIterator(req);

while(iterator.hasNext()){
FileItemStream item = iterator.next();
InputStream stream = item.openStream(); $ item.isFormField()){
log.warning(Champs texte avec id:+ item.getFieldName()+,et nom:+ Streams.asString()流));
} else {
log.warning(Nous avons un fichieràuploader:+ item.getFieldName()+
,appelé=+ item.getName());

//你现在有文件名(item.getName()和
//内容(你可以从流中读取),这里我们只是
//打印它们退出到servlet输出流,但是你
//可能会想要做一些更有趣的事情(对于
//例如,将它们包装在Blob中并将它们提交给
//数据存储)
//打开一个通道写入它


byte [] bytes = ByteStreams.toByteArray(stream);

try {
writeChannel.write(ByteBuffer.wrap(bytes));
} finally {
writeChannel.close();
stream.close();
}
}

} catch(FileUploadException e){
// TODO自动生成的catch块
e.printStackTrace();
}



}

我希望这些示例可以帮助您使用应用引擎和Google云存储!


I'm working on my upload.java servlet to store .jpg to GCS.

I use GCS client library instead of Google Cloud Storage API. But I dont't find any sample to upload photo (doPost Method) so my code doesn't work...

Sending is a success (I can see my photo on GCS with a good size 465.24KB), but when I try to view this one, i can't:

Here is my code:

upload.java servlet public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {

            //Read the file contents from the input stream
            GcsService gcsService = GcsServiceFactory.createGcsService();

            GcsFilename filename = new GcsFilename(BUCKETNAME, FILENAME);


            GcsFileOptions options = new GcsFileOptions.Builder()
                .mimeType("image/jpeg")
                .acl("public-read")
                .addUserMetadata("myfield1", "my field value")
                .build();

            GcsOutputChannel writeChannel = gcsService.createOrReplace(filename, options);
            InputStream is = request.getInputStream();

            try {
                copy(is, Channels.newOutputStream(writeChannel));
            } finally {
                writeChannel.close();
                is.close();
            }

        }

      private void copy(InputStream input, OutputStream output) throws IOException {
            byte[] buffer = new byte[256];
            int bytesRead = input.read(buffer);
            while (bytesRead != -1) {
                output.write(buffer, 0, bytesRead);
                bytesRead = input.read(buffer);
            }
        }

android code (To send photo)

HttpPost httppost = new HttpPost("adress.appengine.com/upload");


                //On créé un fichier File qui contient la photo que l'on vient de prendre (Accessible via son Path)
                File f = new File(AccueilActivity.fileUri.getPath());

                //On créé un FileBody (Contenu de notre requête http POST) contenant notre photo
                FileBody fileBody = new FileBody(f);

                //Permet de créer une requête avec plusieurs partie
                MultipartEntity reqEntity = new MultipartEntity();

                //On ajoute notre photo avec le mot clé file.
                reqEntity.addPart("file", fileBody);

                //On set notre requête HTTP
                httppost.setEntity(reqEntity);

                //On execute notre requete HTTP Post, et on appele du coup automatiquement le servlet "uploaded",
                //et on met la réponse dans response.
                HttpResponse response = httpClient.execute(httppost);

                //Ici on récupère l'entête de notre réponse HTTP (Tout sauf le code réponse)
                HttpEntity urlEntity = response.getEntity();

Thanks in advance !

解决方案

I finally found (And by myself) the solution to my problem! And I pretty proud of that =D

The code for Android:

//Actions à réaliser en fond
        protected String doInBackground(String... params) {

            //Création d'une requête HTTP
            HttpClient httpClient = new DefaultHttpClient();

            //On construit notre adresse Post grâce à ce que l'on vient de récupérer
            HttpPost httppost = new HttpPost("http://your_id.appspot.com/upload");

            //On créé un fichier File qui contient la photo que l'on vient de prendre (Accessible via son Path)
            File f = new File(AccueilActivity.fileUri.getPath());

            //Et là on essaie !
            try {

                 MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create();
                 entityBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
                 entityBuilder.addBinaryBody("Photo_a_uploader", f);
                 entityBuilder.addTextBody("Type", "Type que l'utilisateur a choisi");

                 httppost.setEntity(entityBuilder.build());
                 HttpResponse response = httpClient.execute(httppost);


        } catch (ClientProtocolException e) {
            // Si on tombe dans le catch, on set notre variable à 2.
            e.printStackTrace();

        } catch (IOException e) {
            // Si on tombe dans le catch, on set notre variable à 2.
            e.printStackTrace();
        }

The code App Engine

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

            //Read the file contents from the input stream
            GcsService gcsService = GcsServiceFactory.createGcsService();

            GcsFilename filename = new GcsFilename(BUCKETNAME, FILENAME);

            GcsFileOptions options = new GcsFileOptions.Builder()
                    .mimeType("image/jpg")
                    .acl("public-read")
                    .addUserMetadata("myfield1", "my field value")
                    .build();

            GcsOutputChannel writeChannel = gcsService.createOrReplace(filename, options);

            ServletFileUpload upload = new ServletFileUpload();

            res.setContentType("text/plain");

            try {
                FileItemIterator iterator = upload.getItemIterator(req);

                    while (iterator.hasNext()) {
                        FileItemStream item = iterator.next();
                        InputStream stream = item.openStream();

                        if (item.isFormField()) {
                          log.warning("Champs texte avec id: " + item.getFieldName()+", et nom: "+Streams.asString(stream));
                        } else {
                          log.warning("Nous avons un fichier à uploader : " + item.getFieldName() +
                                      ", appelé = " + item.getName());

                          // You now have the filename (item.getName() and the
                          // contents (which you can read from stream). Here we just
                          // print them back out to the servlet output stream, but you
                          // will probably want to do something more interesting (for
                          // example, wrap them in a Blob and commit them to the
                          // datastore).
                          // Open a channel to write to it


                          byte[] bytes = ByteStreams.toByteArray(stream);

                          try {
                                writeChannel.write(ByteBuffer.wrap(bytes));
                          } finally {
                                writeChannel.close();
                                stream.close();
                          }
                        }
                  }
                } catch (FileUploadException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }



         }

I hope these sample help you with app engine and google cloud storage !

这篇关于照片无法正确上传GCS App Engine的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-02 01:33