I want to create an extension that prevents Office documents download and instead opens them in Office Online. Do browsers (preferably Chrome and Edge) have such API and what code do I need to write to implement my idea?
If we talk about Edge then we cannot stop the file from getting download.
If you have the direct link of file then you can directly open it using Office Online.
You can try to store your Office files on OneDrive. Then you can open it via Office Online.
There is an extension available which supports both Chrome and Edge for the same purpose.
If you store the file in OneDrive then it can open the documents in Office online.
But, It cannot stop the Office files from getting download.
Quick access to your Office files in the browser
I did not get any code example to develop the extension that can prevent the user from downloading the Office file and open it in Office Online.
For chrome (although Edge is supposed to support chrome APIs but I've not tested) please check a potential solution at https://browserextensionresources.blogspot.com/2018/09/intercepting-file-download-in-chrome.html
Let's take Excel for example. In Excel 2016, when I select an add-in in the STORE, after clicking on Trust It, will the code (.html, .js files) of the add-in be downloaded or installed on my machine?
In other words, have the add-ins under MY ADD-INS been already installed on my machine, such that i could load and run them without Internet (if an add-in does not send or receive special data to or from Internet)?
I am asking this question, because i want to know if a basic add-in always requires Internet access to work.
As Eric mentions, Office add-ins are indeed web based. However, to add a bit to his answer:
While you definitely need a one-time access to fetch the manifest and the original HTML/JS/CSS files, if your add-in is not using license checking (it's free) and does not require web services, you should be able to make a website that uses standard offlining techniques to load with no internet connection after the first time.
I tried it out real quick with pointing a manifest at http://html5demos.com/offlineapp. After loading it once and then disconnecting my internet, I was still able to load that page.
Hope this helps,
~ Michael
Yes, the new Office add-ins are web-based. They are all defined - and installed - by a manifest file which specifies the URL location of the web source files. These are always hosted on the provider's web server and are not cached for offline use. The licensing system used by most add-ins (the ones that aren't free) requires a connection to the provider's web server which in turns needs to verify the user's license against the Office Verification Licensing Service. If offline use was enabled users could use a trial license in perpetuity without the provider being aware.
We're in the process of converting a legacy desktop application into a web enabled equivalent.
However one feature is causing difficulty, editing MS Word documents.
Current proposed solution is publishing the DOC and DOCX files via WebDAV and using a custom ActiveX component to launch WinWord and pointing it at a file via a URL.
This works but it's limited in scope and the worlds moved on since it was conceived.
Is is possible to use the new Office Web Apps to do this completely in-browser?
So, still publish DOC files via WebDAV, but only to a web server hosting the Office Web Apps and redirecting the user to a URL rather than launching a local windows exe via activex.
Can you do this with the new Office Web Apps?
Where is the documentation on how to achieve this?
Yes, you can launch editing of MS Office documents from a web browser, using the sharepoint dll available in IE:
Eg
Set EditDocumentButton = CreateObject("SharePoint.OpenDocuments.3")
strDocument = 'http://localhost:8080' + strDocument;
EditDocumentButton.EditDocument(strDocument)
If your server is running java you can use Milton (http://milton.io) to integrate directly into your business app and edit the document in place.
Is the following behavior possible (using some features of Microsoft Office not very well known by a Linux guy)
Upload Microsoft Excel (or some other office file in Plone) as File content type
Save
When you click the file next time it opens directly in Microsoft Excel
When pressing Save in Excel it directly updates the file on the server, not the local temporary copy
I think Microsoft Office provides some APIs to do things like this but I have no idea how they work. Some Webdav URLs maybe?
Enabling external editing and using Zope External Editor Client (PYPI) should to do just that (for Archetype -based content types), but it must be installed on all client machines and may have issues. The development version should also support Dexterity-based content types.
I have a MOSS 07 site that is configured for anonymous access. There is a document library within this site that also has anonymous access enabled. When an anonymous user clicks on a PDF file in this library, he or she can read or download it with no problem. When a user clicks on an Office document, he or she is prompted with a login box. The user can cancel out of this box without entering a log in, and will be taken to the document.
This happens in IE but not FireFox.
I see some references to this question on the web but no clear solutions:
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.sharepoint.windowsservices.development&tid=5452e093-a0d7-45c5-8ed0-96551e854cec&cat=en_US_CC8402B4-DC5E-652D-7DB2-0119AFB7C906&lang=en&cr=US&sloc=&p=1
http://www.sharepointu.com/forums/t/5779.aspx
http://www.eggheadcafe.com/software/aspnet/30817418/anonymous-users-getting-p.aspx
To disable login prompt opening office documents from SharePoint 2010 do the following settings in web.config
<system.webServer>
<security>
<requestFiltering allowDoubleEscaping="true">
<!-- here's where the magic happens -->
<verbs allowUnlisted="true">
<add verb="OPTIONS" allowed="false" />
<add verb="PROPFIND" allowed="false" />
</verbs>
</requestFiltering>
</security>
</system.webServer>
If Sharepoint Shared Workspace is enabled in MS Word this may prompt users with a Windows login if users do not have permissions to access or create a Shared Workspace. Do the followoing to turn this off:
Open MS Word
Go to Tools/Options
Click General Tab
Click Service Options
Click Shared Workspace
Uncheck box that says “The document is part of a Workspace or SharePoint Site.”
Click OK
Click OK
Try to hit a MS Word document from the SharePoint site.
If this resolves issue repeat steps with every MS Office program to eliminate the prompt. (Excel, PowerPoint, Visio, ect)
http://office.microsoft.com/en-us/word/HP010414641033.aspx
Unfortuantly the only work around I've found breaks some functionality for logged in users (can't upload multiple files, connect to outlook ect..)
If that is acceptable, or you want to try it and see:
In central admin > application management > application security > authentication providers select your web app and select your provider (likely "default").
Select No for client integration and save the settings.
Open your web config, find the line <add verb="OPTIONS,PROPFIND,PUT,LOCK,UNLOCK..... and remove the verb OPTIONS.
You should no longer be asked in ie for credentials. To reverse this simply undo both changes.
If you can click cancel and it comes up the problem is...
AuthForwardServerList
http://support.microsoft.com/kb/943280
Office doesn't know the site is trusted/local so it doesn't fwd your credentials and prompts you with an opportunity to provide them. It's a feature....
If you list your site in the proper registry key it will forward your credentials which are not needed but you won't get prompted.
If you have a url rewriting module or urlscan, configure the software to send http 403 to http OPTIONS requests.
In the Sharepoint Server 2010, The solution method is a little bit changing because the new generation Sharepoint can not hold verbs in web.config. Therfore, you must change the method. First of all, you open IIS 7.0 and choose your application site. You can see many items at the middle of the screen. You choose and double click Request Filters. In the request filtres, you can see "Verbs". You can add OPTIONS and PROPFIND verbs to a deny mode. And finally test your site. Sometimes, Sharepoint needs to close Client Integration Mode of your site. If need, you can close Client Integration Mode in Central Administration.
Possible cause and resolution:
http://support.microsoft.com/kb/943280
"You are prompted to enter your credentials when you access an FQDN site from a computer that is running Windows Vista or Windows 7 and has no proxy configured"
"For example, when you open a Microsoft Office file from a Microsoft Office SharePoint site by using 2007 Microsoft Office on a Windows Vista-based client computer that has no proxy configured, you are prompted for authentication."
My guess is that the Office client is loading the underlying document template from another location where anonymous access is enabled. This also explains why you can still open the document as the Office client can also work without loading the template the document was originally created from. To see the template URL in Word 2007, enable the Developer Ribbon from Word options and click the Document Template button on the ribbon.
That doesn't seem to be it. Once of the documents in question is an Excel file, which would not use the .doc template. Also, in the Document Template dialog, it doesn't give me a url to the SharePoint template file if I create a new Word document based on it. It just says the template is "Normal." I also tried disabling the template at the document library level and it doesn't change the password situation.
When opening an Office document in IE, an ActiveX component is used to call the client application, and prompt it to open the document. In other browsers, the download is a standard hyperlink, handled by the browser.
Does this happen in search results and in standard linked columns in document libraries as well?
Using a tool like Fiddler (as referenced/suggested in your first link reference, see http://www.fiddlertool.com/fiddler/ for more info) is the only efficient way of determining the root cause of this type of issue I'm aware of. Whatever is causing this will be happening over HTTP. A debugging proxy like Fiddler will show you exactly which URL/resource is causing the request for authentication.
On a related note, are you running a recent build of the platform? It might be wise to check to make sure this issue hasn't already been addressed by MS e.g. in a hotfix. The best list of updates I'm aware of is here: http://www.harbar.net/articles/postsp1.aspx
Check this : Remove Login box when anonymous users download office document from SharePoint Site
http://www.theblackknightsings.com/RemoveLoginBoxWhenAnonymousUsersDownloadOfficeDocumentFromSharePointSite.aspx
When developing Extranet/Internet site in SharePoint you often want to allow anonymous access and this works fairly well.
But there is one are where the out of the box experience fails regarding anonymous access and that is when you allow the users to download Microsoft Office documents. In that case IE/Office pops up a couple of Login dialogs, if the user cancels out of these the document opens as expected, but you really don't want the user to have to cancel a couple of dialogs to open your documents
The problem is that office tries to be intelligent and issues a Microsoft Office Protocol Discovery request to see how much the user is allowed to do, but SharePoint responds with access denied until the users logs in.
The solution I've found is to implement a HttpModule which rejects the Microsoft Office Protocol Discovery request if the user isn't logged in and this gets rid of the Login boxes
I'm guessing that you use Windows Vista. We had this problem on Vista but not on XP.
From Microsoft: In Windows Vista, Internet Explorer uses the Web Client service when you use Internet Explorer to access a WebDAV resource. The Web Client Service uses Windows HTTP Services (WinHTTP) to perform the network I/O to the remote host. WinHTTP sends user credentials only in response to requests that occur on a local intranet site. However, WinHTTP does not check the security zone settings in Internet Explorer to determine whether a Web site is in a zone that lets credentials be sent automatically.
If no proxy is configured, WinHTTP sends credentials only to local intranet sites.
Note If the URL contains no period in the server’s name, such as in the following example, the server is assumed to be on a local intranet site:
http://sharepoint/davshare
If the URL contains periods, the server is assumed to be on the Internet. The periods indicate that you use an FQDN address. Therefore, no credentials are automatically sent to this server unless a proxy is configured and unless this server is indicated for proxy bypass.
This is a known issue that has not quite been completely fixed yet. There is a MSDN blog about it here: http://blogs.msdn.com/sharepoint/archive/2007/10/19/known-issue-office-2007-on-windows-vista-prompts-for-user-credentials-when-opening-documents-in-a-sharepoint-2007-site.aspx
There is an interesting workaround posted here: http://grounding.co.za/blogs/neil/archive/2008/11/10/workaround-sharepoint-keeps-prompting-for-login-when-creating-office-2007-documents-on-vista.aspx
Ultimately there is a patch that has been included with Vista SP1 but it also requires a registry edit. We just recently got this to work using the following steps on a Windows Vista SP2 client:
Open regedit. Navigate to the following subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters
Create a new Multi-String value called AuthForwardServerList and give it a value of (for example):
https://.Contoso.com
http://.dns.live.com
*.microsoft.com
https://172.169.4.6
Then restart the WebClient service.
We were able to get this working by changing IE settings.
We have the site URL in Trusted Sites.
Under Custom Settings set User Authentication to: Automatic logon with current user name and password
I found a solution. First of all, you open the web application config file under the inetpub. Then you find the add verbs section. In this section, many verbs were added in the installation time. Delete Options and Profind verbs and save config file. Finally test the problem and see it. The problem is finished.
I've found the following workaround:
http://www.objectsharp.com/cs/blogs/max/archive/2008/04/21/sharepoint-public-facing-website-and-microsoft-office-documents.aspx
To keep it simple:
Disable client integration
Remove the OPTIONS verb from the registration line in the web.config file for the site