I am developing a backend using Android Studio and Java.
I use objectify to manipulate entities in Google's Datastore.
The question is the following: everything works ok locally. I can call any of the endpoint and add, update and delete entities. However, anything to do with the same entities do not seem to work on GAE... Is there anything specific required for this to work?
Logs are fairly limited also but it appears all endpoints register properly.
The only thing meaningful out of the GAE and logs section is for return calls being set to 200 but nothing more....
Thoughts? Thanks.
I was looking at the google public issue tracker and saw your code posted there (I am also editing your answer to add said code). I can't help but notice that in your "test.html", you load the function from "localhost:8080". This will obviously break your code whenever you're using it on a client's machine, because it will try to load the function from HIS localhost, which won't have your function in it.
When you're running your code on your production server, you would need to use something like "your-end-point.your-application.appspot.com" to get your function.
Also, I think that you can ONLY pass around either JSON or "JavaBeans" object. And it seems the "Test" you are passing isn't a JavaBeans (it has a constructor with at least a parameter).
The fact it never loads the function properly could also explain why your Logs don't show.
Related
I am a beginner with React. I discovered this template "core-ui" which is very popular :
https://github.com/coreui/coreui-free-react-admin-template
I installed it in my local machine. And is works, perfect. Very beautiful, I will use it.
Now I would like to make requests to some external endpoints and retrieve some data (for a table, for a login , etc....). I did not find how to do that in the documentation. I searched in the code where and how to do that, without success.
How can I do that?
UPDATE: Please, if anyone can help: Google is waiting for inputs and examples of this problem on their bug tracking tool. If you have reproducible steps for this issue, please share them on: https://code.google.com/p/googleappengine/issues/detail?id=10937
I'm trying to fetch data from the StackExchange API using a Google App Engine backend. As you may know, some of StackExchange's APIs are site-specific, requiring developers to run queries against every site the user is registered in.
So, here's my backend code for fetching timeline data from these sites. The feed_info_site variable holds the StackExchange site name (such as 'security', 'serverfault', etc.).
data = json.loads(urllib.urlopen("%sme/timeline?%s" %
(self.API_BASE_URL, urllib.urlencode({"pagesize": 100,
"fromdate": se_since_timestamp, "filter": "!9WWBR
(nmw", "site": feed_info_site, "access_token":
decrypt(self.API_ACCESS_TOKEN_SECRET, self.access_token), "key":
self.API_APP_KEY}))).read())
for item in data['items']:
... # code for parsing timeline items
When running this query on all sites except Stack Overflow, everything works OK. What's weird is, when the feed_info_site variable is set to 'stackoverflow', I get the following error from Google App Engine:
HTTPException: Invalid and/or missing SSL certificate for URL:
https://api.stackexchange.com/2.2/me/timeline?
filter=%219WWBR%28nmw&access_token=
<ACCESS_TOKEN_REMOVED>&fromdate=1&pagesize=100&key=
<API_KEY_REMOVED>&site=stackoverflow
Of course, if I run the same query in Safari, I get the JSON results I'm expecting from the API. So the problem really lies in Google's URLfetch service. I found several topics here on Stack Overflow related to similar HTTPS/SSL exceptions, but no accepted answer solved my problems. I tried removing cacerts.txt files. I also tried making the call with validate_certificate=False, with no success.
I think the problem is not strictly related to HTTPS/SSL. If so, how would you explain that changing a single API parameter would make the request to fail?
Wait for the next update to the app engine (scheduled one soon) then update.
Replace browserid.org/verify with another service (verifier.loogin.persona.org/verify is a good service hosted by Mozilla what could be used)
Make sure cacerts.txt doesnt exist (looks like you have sorted but just in-case :-) )
Attempt again
Good luck!
-Brendan
I was facing the same error, google has updated the app engine now, error resolved, please check the updated docs.
Ok, i found this link https://code.google.com/p/gwt-platform/wiki/CrawlerSupport#Using_gwtp-crawler-service that explain how you can make your GWTP app crawlable.
I got some GWTP experience, but i know nothing about AppEngine.
Google said its "crawlservice.appspot.com" can parse any Ajax page. Now I have a page "http://mydomain.com#!article" that has an artice that was pulled from Database. Say that page has the text "this is my article". Now I open this link:
crawlservice.appspot.com/?key=123456&url=http://mydomain.com#!article, then i can see all javascript but I couldn't find the text "this is my article".
Why?
Now let check with a real life example
open this link https://groups.google.com/forum/#!topic/google-web-toolkit/Syi04ArKl4k & you will see the text "If i open that url in IE"
Now you open http://crawlservice.appspot.com/?key=123456&url=https://groups.google.com/forum/#!topic/google-web-toolkit/Syi04ArKl4k you can see all javascript but there is no text "If i open that url in IE",
Why is it?
SO if i use http://crawlservice.appspot.com/?key=123456&url=mydomain#!article then Can google crawler be able to see the text in mydomain#!article?
also why the key=123456, it means everyone can use this service? do we have our own key? does google limit the number of calls to their service?
Could you explain all these things?
Extra Info:
Christopher suggested me to use this example
https://github.com/ArcBees/GWTP-Samples/tree/master/gwtp-samples/gwtp-sample-crawler-service
However, I ran into other problem. My app is a pure GWTP, it doesn't have appengine-web.xml in WEB-INF. I have no idea what is appengine or GAE mean or what is Maven.
DO i need to register AppEngine?
My Appp may have a lot of traffic. Also I am using Godaddy VPS. I don't want to register App Engine since I have to pay for Google for extra traffic.
Everything in my GWTP App is ok right now except Crawler Function.
So if I don't use Google App Engine, then how can i build Crawler Function for GWTP?
I tried to use HTMLUnit for my app, but HTMLUnit doesn't work for GWTP (See details in here Why HTMLUnit always shows the HostPage no matter what url I type in (Crawlable GWT APP)? )
I believe you are not allowed to crawl Google Groups. Probably they are actively trying to prevent this, so you do not see the expected content.
There's a couple points I wish to elaborate on:
The Google Code documentation is no longer maintained. You should look on Github instead: https://github.com/ArcBees/GWTP/wiki/Crawler-Support
You shouldn't use http://crawlservice.appspot.com. This isn't a Google service, it's out of date and we may decide to delete it down the road. This only serves as a public example. You should create your own application on App Engine (https://appengine.google.com/)
There is a sample here (https://github.com/ArcBees/GWTP-Samples/tree/master/gwtp-samples/gwtp-sample-crawler-service) using GWTP's Crawler Service. You can basically copy-paste it. Just make sure you update the <application> tag in appengine-web.xml to the name of your application and use your own service key in CrawlerModule.
Finally, if your client uses GWTP and you followed the documentation, it will work. If you want to try it manually, you must encode the Query Parameters.
For example http://crawlservice.appspot.com/?key=123456&url=http://www.arcbees.com#!service will not work because the hash (everything including and after #) is not sent to the server.
On the other hand http://crawlservice.appspot.com/?key=123456&url=http%3A%2F%2Fwww.arcbees.com%2F%23!service will work.
Well, I'm having a weird error here:
I'm developing one GAE app to read some Twitter Data, and after read a lot of docs, I have it working on my test server (Running on my pc) but after deploy and test on the real (my appspot domain) it shows this message:
401:Authentication credentials (https://dev.twitter.com/pages/auth) were missing or >incorrect. Ensure that you have set valid consumer key/secret, access token/secret, and the >system clock is in sync.
message - Could not authenticate you
code - 32
I've tried to recreate my OAuthAppToken and OAuthAppTokenSecret keys, even changing the permissions to "Write, Read and Direct Messages" and even assingning one Callback URL but nothing seems to work...
I've tried using twitter4j.properties OR using setOAuthConsumer(TW_CONSUMER_KEY, TW_CONSUMER_SECRET) OR a ConfigurationBuilder whith the correct constants and I'm experimenting the same Issue.
I'm working with AppEngine 1.8.3 and Twitter4j 3.0.4
Iv'e been writing on log and the Twitter object seems to be well created... I dont understand why is working on my PC but not on the real app.
On some other post someone says that could be because it needs to use Sync clock.. but he doesn't explains where to change that property...
Did someone had a clue?
Ok, the problem was me (and Twitter.... well..... I really think it was Twitter problem for being so dark on his api messages)...
On testing server I was looking for an existing account and on the cloud I was looking for an inexistent one. So, It was my mistake. But seriously, what about Twitter saying: "Access Forbidden"? That doesn't have any sense...
I've created an application using Google Web Toolkit and Google App Engine that saves objects based on user selections into a RPC Service Implementation.
It was my understanding that everytime GWT "creates" this service, the data is reinstantiated with the default values. Unfortunately it seems like when a user on one computer saves a change to the data, another user on another computer is seeing the data change on their end. Im not using a datastore or anything so why is this happening?
EDIT: After some research I am seeing that I need to use sessions to handle the delivery of the objects. However, in my RemoteServiceServlet I am calling this.getThreadLocalRequest and it's returning null. Why does this.getThreadLocalRequest() return null??
UPDATE: Answering my own questions here : ) You cannot getThreadLocalRequest() in the constructor of your Servlet. duh.
The problem was that I was calling getThreadLocalRequest() in the constructor of my servlet. Good thing to be aware of - the local request doesnt happen until the servlet is loaded.