I have to enhance an existing JAVA app to store deadlines into several calendar all owned (created) by the same Shared-Mailbox.
Synchronisation of the deadlines in the app and the outlook calendars is no problem.
Apart from syncing the dates the JAVA app should be able to send invitations to the specific calendar. I have used the description https://willcode4foodblog.wordpress.com/2012/04/13/understanding-sharing-invitation-requests-ews-managed-api-1-2-part-1/. I needed to port that stuff from c# to JAVA. On sendAndSaveMessage I always receive this Exception:
exchange.webservices.data.core.exception.service.remote.ServiceRequestException: The request failed. An internal server error occurred. The operation failed.
at microsoft.exchange.webservices.data.core.request.SimpleServiceRequestBase.internalExecute(SimpleServiceRequestBase.java:74)
at microsoft.exchange.webservices.data.core.request.MultiResponseServiceRequest.execute(MultiResponseServiceRequest.java:158)
at microsoft.exchange.webservices.data.core.ExchangeService.sendItem(ExchangeService.java:789)
at microsoft.exchange.webservices.data.core.service.item.EmailMessage.internalSend(EmailMessage.java:156)
at microsoft.exchange.webservices.data.core.service.item.EmailMessage.sendAndSaveCopy(EmailMessage.java:300)
Using the debugger I found out, that all Extended Properties of MapiPropertyType.Binare have a null value. That's eg.
byte[] binInitiatorEntryId = hexStringToByteArray(initiatorEntryID);
ExtendedPropertyDefinition pidLidSharingInitiatorEntryId =
new ExtendedPropertyDefinition(propertySetSharing, 0x8A09, MapiPropertyType.Binary);
invitationRequest.setExtendedProperty(pidLidSharingInitiatorEntryId, binInitiatorEntryId);
So in the debugger the extended property exists, but the value is "null".
All other fields that are noted in the example look ok in the debugger. It's just that the binaries are all "null". I also compared the sharing_metadata.xml attachment with one created by Outlook and they are identical. Ok, there are a few fields I got to play with (let's say: do I have to use a "special folder" for pidLidSharingFlavor because I didn't find any explanations in the specs on what is a special folder). But since it is obvious that a "null" value for MapiPropertyType.Binary is not correct it does not make any sense to check other possibilities.
So mainly there are two questions regarding this issue which I hope someone with a bit more experience could explain:
Question 1: Is there any special way in JAVA to store Extended Properties of MapiPropertyType.Binary?
Question 2: Is there any way to get more information on the "internal server error occured" from EWS? Even enhancing the trace does not give any more information beside the XML representation of the message.
Thanks in advance.
ChriS
Related
So for an application that I am writing for a friend of mine, I needed to interact with the google drive and google data api in order to create folders and manipulate data in a google spreadsheet.
Now looking at the API beforehand it all seemed pretty straightforward.
Until you actually make a start and figure out that every piece of documentation you could possibly find on the internet is pretty much deprecated.
Eventually I figured out most parts after some time on the internet (Like authentication and creating new folders / copying files etc.)
so far so good.
But now I have come at the following problem:
I am trying to manipulate a single cell (Well actually multiple but 1 by 1) and after 2 days of going through google's atrocious documentation I have turned to you guys.
I have come as far as authenticating my user and even reading the values from the spreadsheet however I can't seem to write to it.
CellEntry newEntry = new CellEntry(row,col, "value");
service.insert(cellFeedUrl, newEntry);
System.out.println("Added!");
This is what I got from their code sample, however the service.insert() returns an error
Exception in thread "main" com.google.gdata.util.ServiceException: Internal Server Error
Internal Error
at com.google.gdata.client.http.HttpGDataRequest.handleErrorResponse(HttpGDataRequest.java:632)
at com.google.gdata.client.http.GoogleGDataRequest.handleErrorResponse(GoogleGDataRequest.java:564)
at com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:560)
at com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:538)
at com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:536)
at com.google.gdata.client.Service.insert(Service.java:1409)
at com.google.gdata.client.GoogleService.insert(GoogleService.java:613)
I really hope someone here can help me out, I am pretty desperate and google has not been my friend on this one (Neither has google's own documentation)
A.E.
I figured it out myself,
As I already said in one of the comments I passed a value of 0 to variable col, passing that to the google server gave me an error back.
Changing the loop that was calling:
new CellEntry(row,col, "value");
To start at 1 instead of 0 fixed it.
AE
I have a java program that searches a site for updates. It checks and than sleeps for a period of time set by user.
During some testing I set the sleep time to 0 secs, forgot about it and it over-requested (over-spammed?, don't know the terminology) the site. I wouldn't have noticed this if I didn't go to this site and manually checked for something.
The error I get is 429 : too many requests. I've searched the web and found out that the site should send me when is it ok to try again (retry-after header). The problem is that I either don't get this information or can't find it.
I've viewed the source via chrome and didn't find the information. Then I used getErrorStrem and didn't find the information.
In another question on stackoverflow it is said that
if everything is set up properly, you will also have received a
"Retry-after" header along with the 429 response
My knowledge of web technologies is rather limited. The program I wrote looked for patterns that I noticed viewing the source of page. My java knowledge is better, but not great.
So how do I get retry-after info? About 20 hours passed and when I tried again I got the same error.
As specified in the rfc 6585:
The 429 status code indicates that the user has sent too many
requests in a given amount of time ("rate limiting").
The response representations SHOULD include details explaining the
condition, and MAY include a Retry-After header indicating how long
to wait before making a new request.
This specific header is only optional. So if you don't see it in the headers that's because it isn't there.
Including the condition in the response representation is only a recommandation (and so not mandatory)
There is no rules regarding this limit: it depends on the server configuration.
For exact meaning of verbs commonly used in RFCs : you can read this
I've been using j8583 to parse and construct ISO 8583 message in Java. All seems well until one of the message has field 128 in it. That field is always missing when I construct or parse a message that has bit 128, but the other bit (2...127) are fine.
I've double check the xml configuration, and nothing wrong there.
Is it just me or there are actually a bug in j8583? anybody know how to solve this? I'm on a really tight schedule, so changing library for iso 8583 is very unlikely
I'm the author of j8583. I just reviewed the code and there is indeed a problem with MessageFactory.newMessage() where it won't assign field 128 to new messages. I just committed the change, so you can get the latest source from the repository and your new messages will include field 128.
I also reviewed the parsing code and I couldn't find anything wrong there. If you parse a message with field 128 and it's in your parsing guide, the message should contain it.
However, I've encountered certain ISO8583 implementations in which a message has the 128 field set in the bitmap but it's really not in the message. In these cases j8583 can't parse the message because there's missing data. I'm still trying to figure out how to handle this.
When you find any bugs in j8583 please post them in the project page, so I get notified and solve them. I don't usually look for j8583 tagged questions in this site (but I should probably start doing so).
I've often read StackOverflow as a source to get answers; but now I have a very specific question and I can't really find any data on the internet. I trust you to be as helpful as always! :D
Basically, I'm relying on Mozilla's XULRunner and its XPCOM objects to analyze the HTTP stream of an SWT browser in a Java application on Linux.
Heavily based on Snippet128 and Snippet321 from the Java SWT website (can't post more than 1 URL sorry :/ ), my browser so far can parse all of the HTTP headers using an nsIHttpHeaderVisitor - and do some pretty stuff like printing them on a tree and such.
Full source is here.
Now... That's already pretty good. It covers the majority of what I want to do (school assignment at first, going a bit further than asked!).
But what I would really like is to be able to get the raw "content" data from every HTTP request: HTML of course ; but also CSS and images.
I've been trying different ways to achieve this goal, but everything failed so far:
Using an XPCOM object - which one?
nsIInputStream would be a good one. But I can't seem to find where the good stream actually is... The nsIHttpChannel open() method (who gives back an nsIInputStream) seems to be called by the SWT browser, leaving me with no way of getting the stream back.
nsIRequest : no luck.
another Listener that I'd have missed? I just spent an hour trying to use the nsIHttpActivityObserver interface, but it doesn't give me any HTTP content (merely GETs and 200 OK).
Using another object
the SWT's browser for instance. Well it kinda works: its getText() method gives me the html source of the page I'm visiting. But I want more!
I'm really stuck here, and I would greatly appreciate any help.
Cheers!
Florent
Perhaps nsITraceableChannel can help you?
I have an application to build in Java, and I've got some questions to put.
Is there some way to know if one URL of a webpage is real? The user enters the URL and I have to test if it's real, or not.
How can I konw if one webpage has changes since one date, or what is the date of the last update?
In java how can I put an application running on pc boot, the application must run since the user turns on the computer.
I'm not sure what kind of application you want to build. I'll assume it's a desktop application. In order to check if a URL exists, you should make a HTTP HEAD Request, and parse the results. HEAD can be used to check if the page has been modified. In order for an application to start when the PC boots, you have to add a registry entry under Windows; this process is explained here
To check whether a url is valid you could try using a regular expression (regex for urls).
To know if a webpage has changed you can take a look at the http headers (reading http headers in java).
You can't make the program startup automatically on boot, the user must do that. However, you can write code to help the user set the program as startup app; this however depends on the operating system.
I'm not sure what you mean by "real". If you mean "valid", then you can just construct a java.net.URL from a String and catch the resulting MalformedURLException if it's not valid. If you mean that there's actually something there, you could issue an HTTP HEAD request like Geo says, or you could just retrieve the content. HTTPUnit is particularly handy for retrieving web content.
HTTP headers may indicate when the content has changed, as nan suggested above. If you don't want to count on that you can just retrieve the page and store it, or even better, store a hash of the page content. See DigestOutputStream for generating a hash. On a subsequent check for changes you would simply compare the new hash with the the one you stored last time.
Nan is right about start on boot. What OS are you targeting?