![](/img/trans.png)
[英]Google App Engine & Java : upload files into the blobstore
[英]No Response on Google App Engine Java Blobstore Upload from Android
我正在尝试将图像从Android上传到blobstore,但是当服务器servlet完成调用时,Blobstore无法传递任何BlobKey。 当我检查实际的Blobstore时,没有图像上传。 没有错误代码,没有警告,没有错误,什么都没有。 现在我知道服务器上的东西可以工作了,因为上传可以在iOS中工作。 而且,Android代码在本地开发服务器上也可以正常工作,但无法在生产环境中使用。 我希望有人可以在我的代码中发现错误。
提前致谢。
HttpURLConnection connection = null;
try {
Log.d(LOG_TAG, "Starting multipart POST request to: " +fullUrlValue);
URL fullUrl = new URL(fullUrlValue);
//make server call
connection = getClient().getConnection(fullUrl, RequestMethod.POST);
connection.setConnectTimeout(60000); //60 seconds to complete an upload
connection.setUseCaches(false);
connection.setDoInput(true);
connection.setDoOutput(true);
//see if we are streaming the upload
if(requestOptions == null || requestOptions.isChunckedStreamingMode())
{
connection.setChunkedStreamingMode(2048);
}
String boundry = "z6fQbdm2TTgLwPQj9u1HjAM25z9AJuGSx7WG9dnD";
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Cache-Control", "no-cache");
connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundry);
//attach post objects
DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
//add form fields
if(additionalParameters != null && additionalParameters.keySet().size() > 0)
{
Iterator<String> it = additionalParameters.keySet().iterator();
while(it.hasNext())
{
String fieldName = it.next();
if(fieldName != null)
{
String value = additionalParameters.get(fieldName);
if(value != null)
{
//add form field to upload form
outputStream.writeBytes("--" + boundry + "\r\n" + "Content-Disposition: form-data; name=\"" + fieldName + "\"\r\nContent-Type: text/plain; charset=UTF-8\r\n\r\n"+value+"\r\n");
}
}
}
}
//attach file
if(postObjectBytes != null)
{
//build the request body
outputStream.writeBytes("--" + boundry + "\r\n" + "Content-Disposition: form-data; name=\"" + formElementName + "\";filename=\"" + fileName + "\"\r\n\r\n");
//object upload content size
long totalUploadSize = postObjectBytes.length;
//we have to manually process the stream in order to correctly update the progress listener
byte[] buffer = new byte[2048];
long totalBytes = 0;
int bytesRead = 0;
InputStream inputStream = new ByteArrayInputStream(postObjectBytes);
while ((bytesRead = inputStream.read(buffer)) > -1) {
totalBytes += bytesRead;
outputStream.write(buffer, 0, bytesRead);
if(progressListener != null){
progressListener.transferred(totalBytes, totalUploadSize);
}
}
outputStream.writeBytes("\r\n--" + boundry + "--\r\n");
}
outputStream.flush();
outputStream.close();
好了,由于AppEngine BlobStore上载失败并在开发环境中起作用的请求 ,我找到了答案。
显然我在分号和“文件名”开头之间缺少空格。 那太疯狂了。
formElementName + "\";filename
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.