/** Cancel upload process and show an error message to the user. */
private void cancelUpload(String msg) {
successful = false;
uploadFinished();
if (fileInput instanceof IDragAndDropFileInput) {
((IDragAndDropFileInput) fileInput).reset();
}
statusWidget.setStatus(IUploadStatus.Status.ERROR);
statusWidget.setError(msg);
}
/** Adds a file to the upload queue. */
private void addToQueue() {
statusWidget.setStatus(IUploadStatus.Status.QUEUED);
statusWidget.setProgress(0, 0);
if (!fileQueue.contains(getInputName())) {
onStartUpload();
fileQueue.add(getInputName());
if (!multiple && avoidRepeatedFiles) {
fileUploading.add(getFileName());
}
}
}
private boolean validateExtension(String filename) {
if (filename == null || filename.length() == 0) {
return !avoidEmptyFile;
}
boolean valid = Utils.validateExtension(validExtensions, filename);
if (!valid) {
finished = true;
statusWidget.setError(i18nStrs.uploaderInvalidExtension() + validExtensionsMsg);
statusWidget.setStatus(Status.INVALID);
}
return valid;
}
/* (non-Javadoc)
* @see gwtupload.client.IUploader#setI18Constants(gwtupload.client.I18nUploadConstants)
*/
public void setI18Constants(UploaderConstants strs) {
this.i18nStrs = strs;
fileInput.setText(
fileInput instanceof IDragAndDropFileInput
? i18nStrs.uploaderDrop()
: i18nStrs.uploaderBrowse());
statusWidget.setI18Constants(strs);
}
/* (non-Javadoc)
* @see gwtupload.client.IUploader#addOnCancelUploadHandler(gwtupload.client.IUploader.OnCancelUploaderHandler)
*/
public HandlerRegistration addOnCancelUploadHandler(final OnCancelUploaderHandler handler) {
assert handler != null;
return statusWidget.addCancelHandler(
new IUploadStatus.UploadCancelHandler() {
public void onCancel() {
handler.onCancel(thisInstance);
}
});
}
/**
* Called when the uploader detects that the upload process has finished: - in the case of submit
* complete. - in the case of error talking with the server.
*/
private void uploadFinished() {
removeFromQueue();
finished = true;
uploading = false;
updateStatusTimer.cancel();
statusWidget.setVisible(false);
if (successful) {
if (avoidRepeatedFiles) {
fileDone.addAll(fileInput.getFilenames());
statusWidget.setStatus(IUploadStatus.Status.SUCCESS);
} else {
statusWidget.setStatus(IUploadStatus.Status.SUCCESS);
}
} else if (canceled) {
statusWidget.setStatus(IUploadStatus.Status.CANCELED);
} else {
statusWidget.setStatus(IUploadStatus.Status.ERROR);
}
onFinishUpload();
reatachIframe(uploadForm.getElement().getAttribute("target"));
}
/** Cancel the current upload process. */
public void cancel() {
if (getStatus() == Status.UNINITIALIZED) {
return;
}
if (finished && !uploading) {
if (successful) {
try {
sendAjaxRequestToDeleteUploadedFile();
} catch (Exception e) {
}
} else {
statusWidget.setStatus(Status.DELETED);
}
return;
}
if (canceled || getStatus() == Status.CANCELING) {
return;
}
canceled = true;
automaticUploadTimer.cancel();
if (uploading) {
updateStatusTimer.cancel();
try {
sendAjaxRequestToCancelCurrentUpload();
} catch (Exception e) {
log("Exception cancelling request " + e.getMessage(), e);
}
statusWidget.setStatus(IUploadStatus.Status.CANCELING);
} else {
uploadFinished();
reuse();
}
}
/** set the status widget used to display the upload progress. */
public void setStatusWidget(IUploadStatus stat) {
if (stat == null) {
return;
}
uploaderPanel.remove(statusWidget.asWidget());
statusWidget = stat;
if (!stat.asWidget().isAttached()) {
uploaderPanel.add(statusWidget.asWidget());
}
statusWidget.asWidget().addStyleName(STYLE_STATUS);
statusWidget.setVisible(false);
statusWidget.addCancelHandler(cancelHandler);
statusWidget.setStatusChangedHandler(statusChangedHandler);
}
/** Prepare the uploader for a new upload. */
public void reuse() {
this.uploadForm.reset();
updateStatusTimer.cancel();
onSubmitComplete = uploading = canceled = finished = successful = false;
statusWidget.setStatus(Status.UNINITIALIZED);
}
/* (non-Javadoc)
* @see gwtupload.client.IUploader#getStatus()
*/
public Status getStatus() {
return statusWidget.getStatus();
}
public void setServerMessage(ServerMessage msg) {
serverMessage = msg;
successful = true;
statusWidget.setFileNames(msg.getUploadedFileNames());
uploadFinished();
}
private void parseAjaxResponse(String responseTxt) {
if (responseTxt == null) {
return;
}
String error = null;
Document doc = null;
try {
doc = XMLParser.parse(responseTxt);
error = Utils.getXmlNodeValue(doc, "error");
if (error == null) {
// Response brings uploaded files info in either:
// POST response or FINISHED status
String msg = Utils.getXmlNodeValue(doc, TAG_MESSAGE);
serverMessage.setMessage(msg);
String fld = Utils.getXmlNodeValue(doc, TAG_FIELD);
NodeList list = doc.getElementsByTagName(TAG_FILE);
for (int i = 0, l = list.getLength(); i < l; i++) {
UploadedInfo info = new UploadedInfo();
info.setField(getInputName() + "-" + i);
info.setName(Utils.getXmlNodeValue(doc, TAG_NAME, i));
info.setCtype(Utils.getXmlNodeValue(doc, TAG_CTYPE, i));
// TODO: test
info.setKey(Utils.getXmlNodeValue(doc, TAG_KEY, i));
// TODO: remove
info.message = msg;
String url = session.composeURL(PARAM_SHOW + "=" + info.getField());
if (info.getKey() != null) {
url += "&" + PARAM_BLOBKEY + "=" + info.getKey();
}
info.setFileUrl(url);
String size = Utils.getXmlNodeValue(doc, TAG_SIZE, i);
if (size != null) {
info.setSize(Integer.parseInt(size));
}
serverMessage.getUploadedInfos().add(info);
}
}
} catch (Exception e) {
if (responseTxt.toLowerCase().matches("error")) {
error =
i18nStrs.uploaderServerError()
+ "\nAction: "
+ getServletPath()
+ "\nException: "
+ e.getMessage()
+ responseTxt;
}
}
if (error != null) {
successful = false;
cancelUpload(error);
return;
} else if (Utils.getXmlNodeValue(doc, TAG_WAIT) != null) {
if (serverRawResponse != null) {
log(
"server response received, cancelling the upload "
+ getFileNames()
+ " "
+ serverRawResponse,
null);
successful = true;
uploadFinished();
}
} else if (Utils.getXmlNodeValue(doc, TAG_CANCELED) != null) {
log("server response is: canceled " + getFileNames(), null);
successful = false;
canceled = true;
uploadFinished();
return;
} else if (Utils.getXmlNodeValue(doc, TAG_FINISHED) != null) {
log("server response is: finished " + serverMessage.getUploadedFileNames(), null);
successful = true;
if (onSubmitComplete) {
log("POST response from server has been received", null);
uploadFinished();
}
return;
} else if (Utils.getXmlNodeValue(doc, TAG_PERCENT) != null) {
lastData = now();
long transferredKB = Long.valueOf(Utils.getXmlNodeValue(doc, TAG_CURRENT_BYTES)) / 1024;
long totalKB = Long.valueOf(Utils.getXmlNodeValue(doc, TAG_TOTAL_BYTES)) / 1024;
statusWidget.setProgress(transferredKB, totalKB);
log(
"server response transferred " + transferredKB + "/" + totalKB + " " + getFileNames(),
null);
if (onSubmitComplete) {
successful = true; // why suppose an error here in this case ?
String msg = i18nStrs.uploaderBadServerResponse() + "\n" + serverRawResponse;
if (blobstore) {
msg += "\n" + i18nStrs.uploaderBlobstoreBilling();
} else {
msg += "\n" + i18nStrs.uploaderBadParsing();
}
msg += "\n\n" + responseTxt;
log(msg, null); // keep log message anyway
// statusWidget.setError(msg); // disable the user visible error message
uploadFinished();
}
return;
} else {
log("incorrect response: " + getFileNames() + " " + responseTxt, null);
}
if (uploadTimeout > 0 && now() - lastData > uploadTimeout) {
successful = false;
cancelUpload(i18nStrs.uploaderTimeout());
try {
sendAjaxRequestToCancelCurrentUpload();
} catch (Exception e) {
}
}
}
/**
* Method called when the file input has changed. This happens when the user selects a file.
*
* <p>Override this method if you want to add a customized behavior, but remember to call this in
* your function
*/
protected void onChangeInput() {
statusWidget.setStatus(Status.CHANGED);
for (IUploader.OnChangeUploaderHandler handler : onChangeHandlers) {
handler.onChange(this);
}
}
