I'm new to GWT. I need to read a text file from the server, display its content in a TextArea widget, allow the user to modify it, and save the updated file back to the server. Can anyone please tell me, is it possible, and what should be the right way to do this?
It is possible.
You can make a service to access the file (read and write) and the GWT client will easily call the service methods and update the user interface (TextArea).
Read here for more details.
Also you can start right away by making a new GWT project in Eclipse and choose to generate sample code. It will generate a simple service and simple GWT page that calls the service. You can add your methods to this service to try it out as a proof of concept.
If you are using Google App Engine server, there's no way to write file to server because of restriction.
To write file to server, you will need to create your own server, create a service (use Java or another server-side language) then use one of these methods to communicate with your server.
If you still want to use GAE server (on appspot.com domain), you can use another method to store your data like Datastore or Google Cloud Storage, see this article for more information.
Related
Is there a way to create a new Datastore entity kind via some interactive means for Go App Engine apps? The datastore viewer won't let me add new entity kinds, and the interactive console doesn't seem to support Go.
I'm trying to upload some configuration data to datastore, including sensitive data that I don't want to appear in code. So far the best method I can come up with is to write some code to write an empty configuration entity, deploy, run, then use the datastore viewer to set the values.
Thanks in advance.
You absolutely can add new Entity Kinds in the Console.
In the Cloud Console, Click on the Datastore menu item, then 'Create an Entity'. Handy link, just select your project name
Then in the Kind field, just type in your desired Kind name.
First of all your code is safe at AppEngine - nobody can download it. At least nobody outside of Google. You can deploy it to a dedicated version/module and restrict usage to yourself (check current user, ask pass-phrase, etc in your code).
Second you can use Remote API - this way you do not upload any code to AppEngine. You can create entities remotely as you wish using secure HTTPS connection.
My question is how do i get information from a server to my iphone app. let's assume I have completed my current project I'm working on that only needs data to be uploaded to my application.
I understand there is a database or server I must create but how do I go about creating or modifying one for my needs.
I mainly want to store login information from one user and allow users to search for people who have entered login information (name) to add to a friends lists within the current app.
i think in your case you can use Django-tastypie for backend will be good choice.since using django you can develop it in quick time and the tastypie has api services which can used easily for retrieval and sending data
you can go through this
http://django-tastypie.readthedocs.org/en/latest/
Take a look at services like Stackmob or Parse. These types of service could make it really easy for you to get the server side part of your application up and running. These services would act as your database and also provide an easy api for you to access the server side pieces.
I have a Access 2010 frontend database + MySQL as backend. So far it is working fine. I would like to upload document and decided to save on the server rather than on the Database. My first question is, how do I upload file from access frontend to the remote server/location?
I was thinking, maybe store the data on the database and use some kind of triggers or script which reads the blob file from database and saves on the server as well as fills the file path into another column.
is there any easier way to upload files from access frontend to a remote server? I am using MySQL server as backend.
thank you in advance
SFTP with Putty
This might help you - it's a great example using Putty on the Windows machine to communicate over SFTP with the Linux server using VBA: SFTP upload with VBA
You would need to install putty on each Windows machine that uses Access and ensure that the appropriate rights are in place on the Linux server.
Custom Add-In
You could use .NET to create an add-in for access to transfer the file to the server over sockets, but this would require you to write a server-side application to listen for requests. You would have complete freedom over how you implement it at the cost of added complexity for yourself as the developer.
You would need to:
Create an add-in using Visual Studio (or other .NET IDE)
Add this into your Access application and use the API you've built.
Create a server-side application to listen to it (this could be a simple Python application)
SMTP Approach
If you want to be creative you could email the file to your own mock SMTP server using Access' CDO functionality: Sending emails with Access
Again, you would have to create a handler application to handle the SMTP protocol, but I'm sure there are some great examples out there.
HTTP Approach
You could even encode the file and send it over HTTP to a simple PHP server in a simple POST request: Example web request with Access You would need to encode the file to base64 or something or file a way of handling file uploads.
Conclusion
As you can see, the easiest approach by far is using Putty, but there are some interesting custom approaches you could take.
I'd say using either SMTP or HTTP would be suitable but that depends how easily you could set up the server-side handler. There may be existing SMTP emulators out there that you could use to handle receiving and managing files.
this might help someone.
I have used Chilkat FTP activeX component and its working fine. Chilkat provides prewritten code just copied from his website and everything is fine. Although I could not find how to show the transferring progress.
regards
krish
I have a google app engine application which needs to be given a public-private key pair. I don't want to check this into source control because it will be accessible by too many people. Since this is GAE I can't use the build system to write the keys to the file system of the server.
Is there a known best practice for this?
My first thought was does Jenkins provide a way to manage keys securely? I know I can just copy the keys to a location on the jenkins server and copy them into the build but this project will be used by third party teams so I need to provide a UI based solution in jenkins. I did not find any relevant plugin but I would like to make sure there isn't a better way before writing my own.
There are of course several approaches to this. I believe certificates are a concern of admins, not developers.
What we do is have custom admin pages where we upload certificates to blobstore under separate namespace. Then we have an internal "service" (just a simple factory) so that other pieces of code can retrieve certs.
If you are happy to use a cloud based Jenkins, we (CloudBees) have an oauth based solution at appengine.cloudbees.com
You could roll your own. It is not excessively tricky. You will need to
Register with google's api console to get a client key and secret and define the endpoints that your app will show up as
Write some way if feeding those credentials to your Jenkins build. I would recommend using the credentials plugin
Either write a build wrapper that exposes the refresh token to your build (python sdk deployment) or exposes the access token (java sdk... Got to love that the two sdks do the same thing in different ways)
Or use our free service ;-)
The application(JSF+hibernate) is been deployed using the vmc commands as on the cloudfoundry site. able to see the welcome page. postgreSQl service is binded with the application but the application is not able to connect with the database.
And also viewed about the VCAP_SERVICES using java but dont know much about it rather how to create it.
Cloud Foundry uses auto-reconfiguration if you have one service (either MySQL or Postgres) bind to your application. That means you don't need to touch your code at all!
Please review the following article on our docs site:
http://docs.cloudfoundry.com/frameworks/java/spring/spring.html#using-cloud-foundry-services-in-spring-applications
If you still have issues, go ahead and upload a war file of your app and we can take a look.