Click here to close now.

Welcome!

Apache Authors: Don MacVittie, AppDynamics Blog, Pat Romanski, Liz McMillan, Elizabeth White

Blog Feed Post

How to: Get a ClientContext for a site given a full URL

Last week, I was faced with the challenge of determining the URL to the site (web) when I knew the URL to a document in SharePoint.  I also happened to know the URL to the site collection, but I wanted to reliably get the URL to a web so I could get a ClientContext object for it.  Why would I want to do this?  Come to my session (#SPC3000) on Display Templates at #SPC14 to find out!  I also had someone leave a comment on my blog in just the last week about this topic, so I thought now would be a good time to share it.  @JThake suggested that he would have just parsed the path, but given a complex URL, that's not going to work!

With the server-side object model, you can pass a full URL to the SPSite constructor and get a reference to an SPWeb object.  This trick doesn't work though with JSOM.  If you want a reference to a given subsite, you need to pass the exact URL.  This technique wasn't obvious to me or a few others, but luckily @Path2SharePoint shed some light on this when he mentioned I needed to use /_api/contextinfo.  For those of you who have doing a lot with client side code you are probably familiar with this end point because you can get your form digest that way.  Honestly though, there is not a lot of information out there on this particular endpoint.

I did a search on the Internet to see if I could find a complete working example and things were pretty scarce.  Luckily though, I found a snippet on the bottom of a post from @Wictor that had just enough of what I needed.  Let's put it all together.  First let's assume we have a URL like the one below.  This refers to a document in buried in a folder of a document library of a subsite. 

var documentPath = "http://server/sitecollection/site/documents/folder/mydocument.docx";

We need to make a $.ajax() cal to the /_api/contextinfo end point, but first we need to assemble a URL that works.  To do this, we need to strip off the filename.  We'll then append our end point to the path.  We'll just use the substring function and lastIndexOf to split the path off.  If you have a library loaded to work with URLs, you can use one of those methods as well.

documentPath = documentPath.substring(0, documentPath.lastIndexOf('/')) + "/_api/contextinfo";

Now, we need to call $.ajax() to get the objects we need.  One thing to know is that this endpoint requires you to use POST instead of GET.  That means, you can't just try the URL in a web browser.  Here is what the code looks like.

$.ajax({

    url: docuemntPath,

    type: "POST",

    contentType: "application/x-www-url-encoded",

    dataType: "json",

    headers: {

        "Accept": "application/json; odata=verbose",

    },

    success: function (data) {

        if (data.d) {

            var webUrl = data.d.GetContextWebInformation.WebFullUrl;

 

            var clientContext = new SP.ClientContext(webUrl);

        }

    },

    error: function (err) {

       alert(JSON.stringify(err));

    }

);

In the success function, we can get the information we need from data.d.GetContextWebInformation.WebFullUrl.  This has the full path to the site hosting the document.  From there, we can just pass it to the constructor of SP.ClientContext to get a reference to that subsite.  Now you can work directly with the objects on that site such as it's lists or whatever you need.

We'll be using this snippet of code in my talk #SPC3000 at SharePoint Conference.  If you have an interest in display templates, be sure and attend!  Thanks again to everyone that helped me with this!

Read the original blog entry...

More Stories By Corey Roth

Corey Roth, a SharePoint Server MVP, is a consultant at Hitachi Consulting specializing in SharePoint and Office 365 for clients in the energy sector. He has more than ten years of experience delivering solutions in the energy, travel, advertising and consumer electronics verticals.

Corey specializes in delivering ECM and search solutions to clients using SharePoint. Corey has always focused on rapid adoption of new Microsoft technologies including Visual Studio 2013, Office 365, and SharePoint.

He is a member of the .NET Mafia (www.dotnetmafia.com) where he blogs about the latest technology and SharePoint. He is dedicated to the community and speaks regularly at user groups and SharePoint Saturdays.

@ThingsExpo Stories
17th Cloud Expo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Meanwhile, 94% of enterprises are using some form of XaaS – software, platform, and infrastructure as a service.
Internet of Things is moving from being a hype to a reality. Experts estimate that internet connected cars will grow to 152 million, while over 100 million internet connected wireless light bulbs and lamps will be operational by 2020. These and many other intriguing statistics highlight the importance of Internet powered devices and how market penetration is going to multiply many times over in the next few years.
SYS-CON Events announced today that Dyn, the worldwide leader in Internet Performance, will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Dyn is a cloud-based Internet Performance company. Dyn helps companies monitor, control, and optimize online infrastructure for an exceptional end-user experience. Through a world-class network and unrivaled, objective intelligence into Internet conditions, Dyn ensures traffic gets delivered faster, safer, and more reliably than ever.
The basic integration architecture, as defined by ESBs, hasn’t changed for more than a decade. Most cloud integration providers still rely on an ESB architecture and their proprietary connectors. As a result, enterprise integration projects suffer from constraints of availability and reliability of these connectors that are not re-usable across other integration vendors. However, the rapid adoption of APIs and almost ubiquitous availability of APIs amongst most SaaS and Cloud applications are rapidly redefining traditional integration approaches and their reliance on proprietary connectors. ...
"We have a tagline - "Power in the API Economy." What that means is everything that is built in applications and connected applications is done through APIs," explained Roberto Medrano, Executive Vice President at Akana, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
WebRTC converts the entire network into a ubiquitous communications cloud thereby connecting anytime, anywhere through any point. In his session at WebRTC Summit,, Mark Castleman, EIR at Bell Labs and Head of Future X Labs, will discuss how the transformational nature of communications is achieved through the democratizing force of WebRTC. WebRTC is doing for voice what HTML did for web content.
Today air travel is a minefield of delays, hassles and customer disappointment. Airlines struggle to revitalize the experience. GE and M2Mi will demonstrate practical examples of how IoT solutions are helping airlines bring back personalization, reduce trip time and improve reliability. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Dr. Sarah Cooper, M2Mi’s VP Business Development and Engineering, will explore the IoT cloud-based platform technologies driving this change including privacy controls, data transparency and integration of real time context wi...
Buzzword alert: Microservices and IoT at a DevOps conference? What could possibly go wrong? In this Power Panel at DevOps Summit, moderated by Jason Bloomberg, the leading expert on architecting agility for the enterprise and president of Intellyx, panelists peeled away the buzz and discuss the important architectural principles behind implementing IoT solutions for the enterprise. As remote IoT devices and sensors become increasingly intelligent, they become part of our distributed cloud environment, and we must architect and code accordingly. At the very least, you'll have no problem fillin...
The 17th International Cloud Expo has announced that its Call for Papers is open. 17th International Cloud Expo, to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, APM, APIs, Microservices, Security, Big Data, Internet of Things, DevOps and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal today!
The 5th International DevOps Summit, co-located with 17th International Cloud Expo – being held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA – announces that its Call for Papers is open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the world's largest enterprises – and delivering real results. Among the proven benefits, DevOps is corr...
The Internet of Things is not only adding billions of sensors and billions of terabytes to the Internet. It is also forcing a fundamental change in the way we envision Information Technology. For the first time, more data is being created by devices at the edge of the Internet rather than from centralized systems. What does this mean for today's IT professional? In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists addressed this very serious issue of profound change in the industry.
Internet of Things (IoT) will be a hybrid ecosystem of diverse devices and sensors collaborating with operational and enterprise systems to create the next big application. In their session at @ThingsExpo, Bramh Gupta, founder and CEO of robomq.io, and Fred Yatzeck, principal architect leading product development at robomq.io, discussed how choosing the right middleware and integration strategy from the get-go will enable IoT solution developers to adapt and grow with the industry, while at the same time reduce Time to Market (TTM) by using plug and play capabilities offered by a robust IoT ...
SYS-CON Events announced today that Secure Infrastructure & Services will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Secure Infrastructure & Services (SIAS) is a managed services provider of cloud computing solutions for the IBM Power Systems market. The company helps mid-market firms built on IBM hardware platforms to deploy new levels of reliable and cost-effective computing and high availability solutions, leveraging the cloud and the benefits of Infrastructure-as-a-Service (IaaS...
To many people, IoT is a buzzword whose value is not understood. Many people think IoT is all about wearables and home automation. In his session at @ThingsExpo, Mike Kavis, Vice President & Principal Cloud Architect at Cloud Technology Partners, discussed some incredible game-changing use cases and how they are transforming industries like agriculture, manufacturing, health care, and smart cities. He will discuss cool technologies like smart dust, robotics, smart labels, and much more. Prepare to be blown away with a glimpse of the future.
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at @ThingsExpo, James Kirkland, Red Hat's Chief Architect for the Internet of Things and Intelligent Systems, described how to revolutionize your archit...
It is one thing to build single industrial IoT applications, but what will it take to build the Smart Cities and truly society-changing applications of the future? The technology won’t be the problem, it will be the number of parties that need to work together and be aligned in their motivation to succeed. In his session at @ThingsExpo, Jason Mondanaro, Director, Product Management at Metanga, discussed how you can plan to cooperate, partner, and form lasting all-star teams to change the world and it starts with business models and monetization strategies.
SYS-CON Events announced today that BMC will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. BMC delivers software solutions that help IT transform digital enterprises for the ultimate competitive business advantage. BMC has worked with thousands of leading companies to create and deliver powerful IT management services. From mainframe to cloud to mobile, BMC pairs high-speed digital innovation with robust IT industrialization – allowing customers to provide amazing user experiences with optimized IT per...
There will be 150 billion connected devices by 2020. New digital businesses have already disrupted value chains across every industry. APIs are at the center of the digital business. You need to understand what assets you have that can be exposed digitally, what their digital value chain is, and how to create an effective business model around that value chain to compete in this economy. No enterprise can be complacent and not engage in the digital economy. Learn how to be the disruptor and not the disruptee.
The Internet of Things is not only adding billions of sensors and billions of terabytes to the Internet. It is also forcing a fundamental change in the way we envision Information Technology. For the first time, more data is being created by devices at the edge of the Internet rather than from centralized systems. What does this mean for today's IT professional? In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will addresses this very serious issue of profound change in the industry.
Business as usual for IT is evolving into a "Make or Buy" decision on a service-by-service conversation with input from the LOBs. How does your organization move forward with cloud? In his general session at 16th Cloud Expo, Paul Maravei, Regional Sales Manager, Hybrid Cloud and Managed Services at Cisco, discusses how Cisco and its partners offer a market-leading portfolio and ecosystem of cloud infrastructure and application services that allow you to uniquely and securely combine cloud business applications and services across multiple cloud delivery models.