Sitecore - Multiple-Site Error Page Handling - error-handling

I have a multiple-site Sitecore project. I know how to deal with error pages via the webconfig's ErrorPage, ItemNotFoundUrl, LayoutNotFoundUrl, LinkItemNotFoundUrl for one site.
However, I'm wanting to display a different error pages for each site. How can I accomplish this?

In any case, you can probably store the URLs of the error pages for each site as attributes of the /configuration/sitecore/sites/site elements in web.config by extending the Sitecore.Sites.SiteContext class (see for information about extending existing classes).
The SDN forum post provides more information specifically about the 404 /ItemNotFound condition, including an example of an extension of Sitecore.SItes.SiteContext.
For ItemNotFoundUrl, I think it depends on whether you use an item or a file as the 404 page. If you handle 404 with items, then after the item resolver, add a processor to the httpRequestBegin pipeline to set the context item to the 404 item for that site if the context item is null. If you use files, then I think override Sitecore.Pipelines.HttpRequest.ExecuteRequest.HandleItemNotFound() and Sitecore.Resources.Media.MediaRequestHandler.DoProcessRequest() and update the corresponding references in the web.config file.
For ErrorPage, I think you would have to override Sitecore.Pipelines.RenderLayout.SecurityCheck.Process and update the corresponding reference in web.config.
For LayoutNotFoundUrl, I think you would have to override Sitecore.Pipelines.HttpRequest.ExecuteRequest.HandleLayoutNotFound, and update the corresponding reference in web.config.
For LinkItemNotFoundUrl, I would probably add a processor to the renderField pipeline to perform replacement of the default value of the setting with the value that applies for the context site.
If this is a common requirement, we should turn it into a Sitecore Shared Source project, or add it to an existing project.

There's an entry in the SDN scrapbook about how to do this for a multi-site install.

There is a Shared Source project which should fit the requirements is most parts. It's called Sitecore Error Manager.
Hope that helps.

Related

Can APIs be added as a custom asset in the G-reg?

Just like WS-Policies, Swagger , WSDLs, WADLs etc.Can APIs be added as a custom asset in the G-reg?
As far as I understand you need to introduce a new content type artifact(WSDL, WADL, Policy and Schemas are known as content type artifacts) to G-Reg. To upload such artifact programmatically you need to write some custom code which is called handlers and extensions,
Handlers
Please find this blog post which explains a basic handler for your requirement. Other than that please refer below sample media type handlers available in G-Reg(carbon-registry)
WSDLMediaTypeHandler.java
SwaggerMediaTypeHandler.java
WADLMediaTypeHandler.java
GC Eextensions
If you're introducing a content type artifact it is must write a publisher and store extensions to get it work in pub/store. However, users can upload such artifacts in admin/mgt console just by deploying the handler correctly.
Please find this question to get an idea of the extension creation.

Override forcedownload behavior in Sitecore

We had a problem with some of our IE clients failing to download a PDF, even after clicking on the link. We found the answer here resolved our problems: set forcedownload=true for PDF mime types in web.config.
However, that created another problem: we are now unable to render a PDF in a browser when we want to. We used to do this with an iframe. However, as you can see, the PDF just downloads, and does not render in the browser.
I learned that the forcedownload=true setting is actually a default in a subsequent version of Sitecore (v7.2). So, I'm hesitant to revert that.
So, how do I render a PDF in a browser in this situation?
You can leave forceDownload=false on the PDF mime type and instead set the following setting to false:
<setting name="Media.EnableRangeRetrievalRequest" value="false"/>
I faced the same dilema a few months back with the same initial fix. Found out the actual issue last week, I wrote a blog post about it. (In fact, I wrote the answer you linked to, I've updated it with the same information now for future visitors)
The issue is basically a combination of Adobe Reader plugin for IE9, chunked transfer encoding and streaming the file directly from the database. I found if you close your browser and try again, or force refresh with Ctrl+F5 it worked fine. Once Sitecore had cached the file to disk it would continue to work for everyone.
The above setting disables chunked transfer encoding, instead sending the file down to the browser as a single piece. This setting was introduced in Sitecore 6.5+
This is one of the flaws in the MediaRequestHandler and in my opinion; the forceDownload option is pretty useless the way it is designed by default. (Why would ever want to configure this option on media extension only?)
You’ll have to basically turn off the forcedownload option again and replace the MediaRequestHandler with your own one. I usually end up with writing my own anyway because if other issues with the default handler, such as dealing properly with CDN’s etc.
In the ProcessRequest pipeline, you can determine if the item should be “downloaded” or not by setting the Content-Disposition header. You basically need to get rid of the default handling of forceDownload and set your headers based on your own logic.
Personally I prefer to set a query string parameter, such as ?dl=1, and base the Content-Disposition header on this. You could also extend the MediaItem template to contain a default behavior on each item or sub tree (leverage from Sitecore inheritance and standard values), and potentially you could thereby also define (override) a specific filename on each item for the attachment part in the Content-Disposition header.
When rendering the link, you can leverage from the properties collection (write a suitable extension method or similar), so that you can clearly mark your code that the link is meant for download, but still leverage from the built in field render methods. Thereby you eliminate the risk of messing up the page editor etc.
/ Mikael
You have to disable range retrieval request in web.config by setting its value to false.
<setting name="Media.EnableRangeRetrievalRequest" value="false" />
MediaRequestHandler enables Sitecore to download PDF content partially in range using HTTP 206 Status code. You can also overwrite MediaRequestHandler and write your own custom implementation to handle media request.

Application modules with Pyramid

I'm creating a workflow app with pyramid and i'm searching how to make the application modulable : meaning create a core app with sqlalchemy models, base forms with wtforms, and some base templates with mako.
The basic structure of the "Core" app is:
App_Core/core.ini
/setup.py
/...
/App_Core/
/__init__.py
/models.py
/forms.py
/utils.py
/templates/
/templates/base.mako...
/static/
/static/staticfiles...
My goal is to create 1 application per workflow which will be included in the Core app : it seems possible to do that via the includeme function provided with pyramid.
I want to include each workflow via the core.ini file, for example:
pyramid.includes =
workflow_app1
workflow_app2
workflow_app3
...
I defined an new app called workflow_app1 with the following structure:
worflow_app1/
/setup.py
/...
/workflow_app1/
/__init__.py
/models.py
/forms.py
/views.py
/templates/
/templates/workflow_app1.mako
/...
And the _init_.py file will contain the includeme function and will define new routes:
def includeme(config):
config.add_route('route1', '/route1/')
config.add_route('route2', '/route2/')
config.scan()
When i'm writing a view for the worflow_app1, i'm rendering to a template included with that app, but when i'm calling it from the core app, it can't render the template and gives the following error:
TopLevelLookupException: Cant locate template for uri 'workflow-app1.mako'
This error quite logical cause the mako.directories directive is given with the path App_Core_PATH/templates so my template should be in the same folder.
Question1:
Is it possible to make mako searching in each folder of modules the wanted templates?
Question2:
Is it possible to make the workflow-app1.mako inheriting of the base.mako from the core app?
Thanks by advance for your answer.
The solution that I would recommend is switching to asset specs for your templates. They are explicit, allow overriding, and provide better control over your template hierarchy. This means that you would stop using mako.directories and instead use 'workflow_app1:templates/workflow_app1.mako' in your inherits or include or renderer arguments. Given this, it's obvious that you can inherit from your base.mako in your core app, whereas managing the mako.directories option is more difficult.
If you're deadset on mako.directories then you can add a line to it every time you add a package to pyramid.includes.
mako.directores =
App_Core:templates
workflow_app1:templates
workflow_app2:templates
Another option is to switch to jinja2, as its plugin has the ability to add search paths after the fact. Thus your included modules can config.add_jinja2_search_path(...) throwing themselves into the lookup order. Pyramid's mako integration does not offer this option right now.

Restlet static content served from multiple sources

My application needs to be able to serve up static content which can be contained in a number of different places (directories and/or via the class loader). So, for example, a resource /static/file.html might be found in /dir1/file.html or /dir2/file.html; I would want it to try /dir1, and if not found there, then /dir2, and so on.
With servlets in Jetty, I can use either a HandlerList of DefaultServlet, to sequentially try to handle the request from each directory until satisfied, or even easier a single DefaultServlet with a ResourceCollection.
I can't see a way to do something similar in restlet, without writing a class to specifically do this. I could modify Directory to handle multiple sources (in a similar way to DefaultServlet with ResourceCollection), or write a new Restlet which tries each contained Restlet sequentially, until successfully handled (like HandlerList). But before I do that, am I missing another way that already exists to achieve this?
thanks,
Stuart
I confirm that Directory doesn't know how to handle multiple source directories. It would be a nice to add support for this and contribute it back.

EntLib 5 Wrap Handler Message Localization

I have been asked, at very short notice of course, to implement exception logging to the Windows Application event Log in one of our products (vb.Net, framework 3.5, WinForms) using EntLib 5. In and of itself this is fine - I can get that working. However, this is for a client who wants messages in Chinese. Certain parts of the app have language resource files and I found a couple of sentences in my MS EntLib Developers Guide book which suggested that I could use an external resource to provide a localised 'friendly' message in a wrap handler within the Exception Handling Block.
Unfortunately there was no mention of how to actually achieve this but it seemed straightforward enough. I added a new resource to a resx file which lives at the project level for the project which is common to all areas of the application and re-built to project so that the satellite assemblies were built. I then specified the name of the resource in the 'Message Resource Name' field within the EntLib configuration console. the problem arises when I try and specify the 'Message Resource Type'.
I clicked on the search button and found the satellite assembly I needed, but it did not get added to the list of loaded assemblies and therefore I couldn't select it. The problem is that none of the places where I've seen this feature mentioned actually demonstrate how to get it working so I'm not sure where I'm going wrong. The search for the assembly will only let me select a dll or exe so I assume I am supposed to reference the satellite assembly somehow but how do I do this if it won't add it to the list of loaded assemblies?
One point to note is that we have a main executable which then calls numerous class libraries to load areas of functionality as required, and the config file we use throughout is the one which belongs to the main executable. Is it the case that you can only use satellite assemblies which are related to the assembly that the config file belongs to?
I haven't yet fully utilized this feature yet but just something to check, are you using the fully qualified name of the assembly?
EDIT: A potentially applicable link - http://entlib.codeplex.com/discussions/67460