* Use NodeName not Node for cross checking proxies/instances
* Also copy over the meta data to keep the correct cursor/index
* When we sync checks to the ProxyInstance replace rather than accumulate
There are many places in the API where we receive a property set to
`null` which can then lead to defensive code deeper in the app in order
to guard for this type of thing when usually we are expecting an array
or for the property to be undefined using omitempty on the backend.
Previously we had two places where we would deal with this in the
serializer using our 'remove-null' util (KV and Intentions).
This new decorator lets you declaritively define this type of data using
a decorator @NullValue([]) (which would replce a null value with [].
@NullValue in turn uses a more generic @replace helper, which we
currently don't need but would let you replace any value with another,
not just a null value.
An additional benefit here is that the guard/replacement is executed
lazily when we get the property instead of serializing all the values
when they come in via the API. On super large datasets, where we only
visualize part of the dataset (say in our scroll panes), this feels like
a good improvement on the previous approach.
We've always had this idea of being able to markup up information
semantically without thinking about what it should look like, then
applying our %h* placeholder styles to control what the information
should look like.
Back when we originally made our set of %h* placeholders, we tried to
follow Structure as much as possible, which defined the largest header
(which we thought would have been the h1 style) as a super large 3.5rem.
Therefore we made our set of %h* placeholders the same as Structure
beginning at a huge 3.5 size. We then re-overwrote those sizes only in
Consul specific CSS files thinking that this was due to us existing
before Structure did.
Lately we saw an extra clue in Structure - the extra large 3.5 header was
called 'h0'.
This commit moves all our headers to use a zero based scale, and
additionally uses our 3 digit scale as opposed to 1 digit (h1 vs h100),
similar to our color scales (note we don't use a hypen, which we can
alter later if need be), which means we can insert additional h150 etc
if need be.
Additional we stop styling our headers globally (h1 { @extend %h100; }
). This means there is no reason not to use headers for marking up
content depending on what it is rather than what it should look like,
and as a consequence means we can be more purposeful in ordering h*
tags.
Lastly, we use the new scale over the entire codebase and update a
couple of places where we were using using header tags due to what the
styleing for them looked like rather than what the meaning/order was.
* CSS for moving from a horizontal main menu to a side/vertical one
* Add <App /> Component and rearrange <HashcorpConsul /> to use it
1. HashicorpConsul now uses <App />
2. <App /> is now translated and adds 'skip to main content' functionality
3. Adds ember-in-viewport addon in order to visibly hide main navigation
items in order to take them out of focus/tabbing
4. Slight amends to the dom service while I was there
Adds a 'status' for the filtering/searching in the UI, without this its not super clear that you are filtering a recordset due to the menu selections being hidden once closed. You can also use the pills in this status view to delete individual filters.
* Add templating to inject JSON into an application/json script tag
Plus an external script in order to pick it out and inject the values we
need injecting into ember's environment meta tag.
The UI still uses env style naming (CONSUL_*) but we uses the new style
JSON/golang props behind the scenes.
Co-authored-by: Paul Banks <banks@banksco.de>
* ui: Convert Service.GatewayConfig to a model fragment
We added the ember-intl addon, which has its own format-number helper.
We replaced our own similarly named helper with this one, but the
ember-intl one is far stricter and errors if the arguments passed are
undefined. Our previously one would cope with this.
We'd rather continue to use the stricter ember-intl helper, so here we
convert the GatewayConfig property to a model fragment so that we can
give the GatewayConfig.AssociatedServices property a default zero value.
* ui: Keep track of existing intentions and use those to save changes
Previously we risked overwriting existing data in an intention if we
tried to save an intention without having loaded it first, for example
Description and Metadata would have been overwritten.
This change loads in all the intentions for an origin service so we can
pick off the one we need to save and change to ensure that we don't
overwrite any existing data.
This originally comes form the ember-href-to helper and is one of those
errors that when I see it I think ... hmmm
This gives a little bit more of a clue as to what is wrong by logging
the route name you asked for plus the params you passed to it so you:
1. Have more help finding the href-to that is problematic in the
template/component
2. Can see all the parameters you passed (including a potential null
parameter for the thing you are missing)
* Rename a model attr to not be overwritten by ember-data
* Make sure we can click on the instances
* Make sure we can click back to the preevious page, not root
* Add a forwards/back/forwards navigation test for service instances
* Rename a model attr to not be overwritten by ember-data
Co-authored-by: John Cowen <jcowen@hashicorp.com>
* ui: Add EmptyState for exposed paths, plus additional details
1. Add the port to the combined address
2. Use the proxy address for the ip address used
* Convert to glimmer component
* Add spaces to ListenerPort and LocalPathPort Tooltips
* ui: Remove all vestiges of role=tabpanel
* Switch out tablist role for a label, default to Secondary
* Move healthcheckout-output headers to h2, ideally these would be outside the component
* Add aria-label for empty button
* Fix up non-unique ids in topology component
* Temporarily fixup h2 in KV > LockSession
* Fixup dl with no dt
* h3 > h2
* Fix up page objects that were reliant on ids
This PR adds the ns=* query parameter when namespaces are enabled to keep backwards compatibility with how the UI used to work (Intentions page always lists all intention across all namespace you have access to)
I found a tiny dev bug for printing out the current URL during acceptance testing and fixed that up while I was there.
Nodes themselves are not namespaced, so we'd originally assumed we did not need to pass through the ns query parameter when listing or viewing nodes.
As it turns out the API endpoints we use to list and view nodes (and related things) return things that are namespaced, therefore any API requests for nodes do require a the ns query parameter to be passed through to the request.
This PR adds the necessary ns query param to all things Node, apart from the querying for the leader which only returns node related information.
Additionally here we decided to show 0 Services text in the node listing if there are nodes with no service instances within the namespace you are viewing, as this is clearer than showing nothing at all. We also cleaned up/standardized the text we use to in the empty state for service instances.
Moves search things around to match an interface that can be switched in and out of fuzzy searching using fuse.js. We add both fuzzy searching and regex based searching to the codebase here, but it is not yet compiled in.
* Use DataLoader errors for Service Detail and Service Instance
* uiCfg > config use the repo-like async interface where possible
* Clean up node show
* Make sure you can put `=` in dev cookie values
* Never default to default
* Tweak chain variable
* Remove env service
* Pass chain through to the template for the tempalte to clean it up
* Delete controller tests
* Remove cleanup in Nodes show as this is still being used in another tab
* Use dc.Local
* ui: Install ember-intl
Also:
1. Removes our own format-number in order to use ember-intl's instead
2. Moves format-time to format-short-time so as to not clash with
ember-intls own format-time
In order to test certain setups for our metrics visualizations we need to be able to setup several different `ui_config` settings during development/testing. Generally in the UI, we use the Web Inspector to set various cookie values to configure the UI how we need to see it whilst developing, so this PR:
1. Routes `ui_config` through a dev time only `CONSUL_UI_CONFIG` env variable so we can change it via cookies vars.
2. Adds `CONSUL_METRICS_PROXY_ENABLE`, `CONSUL_METRICS_PROVIDER` and `CONSUL_SERVICE_DASHBOARD_URL` so it's easy to set/unset these only values during development.
3. Adds an acceptance testing step so we can setup `ui_config` to whatever we want during testing.
4. Adds an async 'repository-like' method to the `UiConfig` Service so it feels like a repository - incase we ever need to get this via an HTTP API+blocking query.
5. Vaguely unrelated: we allow cookie values to be set via the location.hash whilst in development only e.g. `/ui/services#CONSUL_METRICS_PROXY_ENABLE=1` so we can link to different setups if we ever need to.
All values added here are empty/falsey by default, so in order to see how it was previously you'll need to set the appropriate cookies values, but you can now also easily preview/test the the metrics viz in different/disabled states (with differing `ui_config`)
* Add `Local` property to Datacenters
* If you have not previous datacenter, redirect the user to the local dc
* Add an `is-local` class to the local datacenter in the DC picker
* Add service collections to get all ExternalServices
* Add a basic collection helper
* Use the collections to get all ExternalSources
* Remove old Controllers
* ui: Controller dead code removal
This commit removes a little code that became 'dead' as a result of
previous PRs/commits
* Remove a little more from the settings Controller
* Remove CSS related to being able to set the dashboard_url in settings
* Switch upstream-instances to use new style of searchable
* Add search action to DataCollection plus basic README
* Use DataCollection for PowerSelect searching in child-selectors
* Remove old style filterable search for role/policies and instances
* Remove old helpers/components related to search/sort/filter
* Model layer changes to turn Node:ServiceInstances into hasMany
We tried to make something that feels a little like ember-data yet
not leave our approach of re-shaping the JSON directly from the
response.
1. We added transformHasManyResponse for re-shaping JSON for hasMany
relationships. we avoided the normalize word as ember-data serialize
methods usually return something JSON:API shaped and we distinctly don't
want to do that. Transform was the best word we could think of.
2. The integration tests across all of our models here feel very much
like those types of tests that aren't really testing much, or assert
too much to an extent that they get in the way rather than be of any
use. I'd very much like to move a lot of this to unit tests. Currently
most of the fingerprinting functionality is unit tested and these
integration tests were originally to give confidence that IDs and
related properties were being added correctly.
3. We've added a hasMany relationship, but not the corresponding
belongsTo - yet at least. We don't require the belongsTo right now, and
if we do we can add it later.
* Integrate ServiceInstance search bar for Node:ServiceInstances
* Hide Node.Meta when on the Node:ServiceINstance page
We use a little string replace hack here for a human-like label, this is
soon to be replaced with proper i10n replacement
* Always ensure that a Namespace is set, and add comment explaining
* Refactor Stats and Series components
* Refactor metrics error message for ingress-gateway
* Fix upLines icon positioning
* Remove unused variable from being passed down to Stats
* Adds model layer changes around HealthChecks
1. Makes a HealthCheck model fragment and uses it in ServiceInstances and
Nodes
2. Manually adds a relationship between a ServiceInstance and its
potential ServiceInstanceProxy
3. Misc changes related to the above such as an Exposed property on
MeshChecks, MeshChecks itself
* Add a potential temporary endpoint to distinguish ProxyServiceInstance
* Fix up Node search bar class
* Add search/sort/filter logic
* Fixup Service default sort key
* Add Healthcheck search/sort/filtering
* Tweak CSS add a default Type of 'Serf' when type is blank
* Fix up tests and new test support
* Add ability to search on Service/Node name depending on where you are
* Fixup CheckID search predicate
* Use computed for DataCollection to use caching
* Alpha sort the Type menu
* Temporary fix for new non-changing style Ember Proxys
* Only special case EventSource proxies
* ui: ServiceInstance.Name should be the Service.Name, never the ID
The ServiceInstance.ID should try Service.ID and fallback to
Service.Name, not ServiceInstance.Name. ServiceInstance.Name is just an
alias to Service.Name which is always set.
* ui: Ensure search is enabled for child items in the ACLs area
* Refactor comparators to reuse some utility functions
* Add search and sorting to the ACLs child selector
* Add tests for searching within child selectors
* Allow sorting by CreateIndex
* ui: Fixup service instance healthcheck list not to show ghost check
If the proxy is undefined, then an undefined vaule is appended to the
list of checks
* There are only 6 checks in the mocks so only expect 6
This PR updates the tags that we generate for Envoy stats.
Several of these come with breaking changes, since we can't keep two stats prefixes for a filter.
* ui: Add functionality to metrics mocks:
1. More randomness during blocking queries
2. NaN and undefined values that come from prometheus
3. General trivial amends to bring things closer to the style of the
project
* Provider should always provide data as a string or undefined
* Use a placeholder `-` if the metrics endpoint responds with undefined data
* Pass down nspace and dc from Service model down to prometheus request
* Reviewing notes fix-ups
* Fix on dc/nspace to send from upstream/downstream card
* ui: Add predicate, comparator and necessary files for the search/sort
* Implement search and sort for upstream instance list
* ui: Tweak CSS so its all part of the component
* Remove the old proxy test attribute
* Refactor grid styling for Topology page
* Crate TopologyMetrics Button component and move styling
* Create intention ID
* fixup button styling
* Return a link to the create intention page
* Rename Button to Popover component
* Fixup serializer test
* ui: Inline Topology Intention Actions (#9153)
* Add arrow and dot to/from metrics back in
* Add addional space to have metrics wrap and show in smaller screens
* Move logic for finding positioning
* Use color variables
Co-authored-by: John Cowen <johncowen@users.noreply.github.com>
* Remove Proxy Info and create Upstreams and Exposed Paths tabs
* Update routes formatting
* Update typo for Expose.Checks
* Remove, update, and add tests
* Make consul-upstream-instance-list into a glimmer component
* Create styling for upstream-instance-list component
* ui: Upgrade ember-data models to use native classes/decorators
* ui: Update remaining ember-data imports
* ui: Move ember-data Adapters to use native classes
* ui: Upgrade serializers to native classes/decorators
* ui: remove meta from roles, they never had it to start with
* ui: Apply native class codemod to all services
* ui: Apply native class codemod to routes
* ui: Apply native class codemod to controllers
* Fix up ember proxy `content` issue
* Add a CreateTime on policy creation
* Minor formatting
* Convert child based saving to use ec instead of custom approach
* Remove custom event source repo wrapping initializer
* Repos here are no longer proxy objects revert to using them normally
* Remove areas of code that were used to set up source backed repos
* ui: Add a warning dialog if you go to remove permissions from an intention
* ui: Move modal styles next to component, add warning style
* ui: Move back to using the input name for a selector
* ui: Fixup negative "isn't" step so its optional
* Add warning modal to pageobject
* Fixup test for whether to show the warning modal or not
* Intention change action warning acceptence test
* Add a null/undefined Action
* Add consul-api-double under api
* Update config to reflect api change
* Remove consul-api-double as a dependency
* api -> mock-api
* Fixup mocks path for staging
* Remove local httpGet and shim one in from options
* Add custom httpGet to pass through to provider
* Make a fetch wrapper that adds your token
* Pass the fetch like fetchWithToken wrapper through to the provider
* Fix up httpGet to encode query params again and use fetch-like
* Plumb Datacenter and Namespace to metrics provider in preparation for them being usable.
* Move metrics loader/status to a new component and show reason for being disabled.
* Remove stray console.log
* Rebuild AssetFS to resolve conflicts
* Yarn upgrade
* mend
* Prevent redirect to topology url and hide Topology tab if service has no proxies
* Remove unused computed function from topology model
* Fix up tests
* Remove use of Exists computed function
* Add tests for hiding topology tab
* Update Topology metrics dashboard and configuration links
* Fixup tests
* Remove Dashboard Link from settings page
* Removing use of settings Dashboard links
* ui: Add the most basic workspace root in /ui
* We already have a LICENSE file in the repository root
* Change directory path in build scripts ui-v2 -> ui
* Make yarn install flags configurable from elsewhere
* Minimal workspace root makefile
* Call the new docker specific target
* Update yarn in the docker build image
* Reconfigure the netlify target and move to the higher makefile
* Move ui-v2 -> ui/packages/consul-ui
* Change repo root to refleect new folder structure
* Temporarily don't hoist consul-api-double
* Fixup CI configuration
* Fixup lint errors
* Fixup Netlify target
* Move settings to use the same service/route API as the rest of the app
* Put some ideas down for unit testing on adapters
* Favour `Model` over `Entity`
* Move away from using `reopen` to using Mixins
* Amend messages, comment/document some usage
* Make sure the returns are consistent in normalizePayload, also
Add some todo's in to remind me to think consider this further at a
later date. For example, is normalizePayload to be a hook or an
overridable method
* Start stripping back the HTML to semantics
* Use a variable rather than chaining
* Remove unused helpers
* Start picking through the new designs, start with listing pages
* First draft HTML for every page
* Making progress on the CSS
* Keep plugging away at the catalog css
* Looking at scrolling
* Wire up filtering
* Sort out filter counting, more or less done a few outstanding
* Start knocking the forms into shape
* Add in codemirror
* Keep moving forwards with the form like layouts
* Start looking at ACL editing page, add footer in
* Pull the filters back in, look at an autoresizer for scroll views
* First draft toggles
* 2nd draft healthcheck icons
* Tweak node healthcheck icons
* Looking at healthcheck detail icons
* Tweak the filter-bar and add selections to the in content tabs
* Add ACL create, pill-like acl type highlight
* Tweaking the main nav some more
* Working on the filter-bar and freetext-filter
* Masonry layout
* Stick with `checks` instead of healthy/unhealthy
* Fix up the filter numbers/counts
* Use the thead for a measure
* First draft tomography back in
* First draft DC dropdown
* Add a temporary create buttong to kv's
* Move KV and ACL to use a create page
* Move tags
* Run through old tests
* Injectable server
* Start adding test attributes
* Add some page objects
* More test attributes and pages
* Acl filter objects
* Add a page.. page object
* Clickable items in lists
* Add rest/spread babel plugin, remove mirage for now
* Add fix for ember-collection
* Keep track of acl filters
* ember-cli-page-object
* ember-test-selectors
* ui: update version of ui compile deps
* Update static assets
* Centralize radiogroup helper
* Rejig KV's and begin to clean it up
* Work around lack of Tags for the moment..
* Some little css tweaks and start to remove possibles
* Working on the dc page and incidentals
1. Sort the datacenter-picker list
2. Add a selected state to the datacenter-picker
3. Make dc an {Name: dc}
4. Add an env helper to get to 'env vars' from within templates
* Click outside stuff for the datacenter-picker, is-active on nav
* Make sure the dropdown CTA can be active
* Bump ember add pluralize helper
* Little try at sass based custom queries
* Rejig tablular collection so it deals with resizing, actions
1. WIP: start building actions dropdowns
2. Move tabular collection to deal with resizing to rule out differences
* First draft actions dropdowns
* Add ports, selectable IP's
* Flash messages, plus general cleanup/consistency
1. Add ember-cli-flash for flash messages
2. Move everything to get() instead of item.get
3. Spotted a few things that weren't consistent
* DOn't go lower than zero
* First draft vertical menu
* Missed a get, tweak dropmenu tick
* Big cleanup
1. this.get(), this.set() > get(), set()
2. assign > {...{}, ...{}}
3. Seperator > separator
* WIP: settings
* Moved things into a ui-v2 folder
* Decide on a way to do the settings page whilst maintaining the url + dc's
* Start some error pages
* Remove base64 polyfill
* Tie in settings, fix atob bug, tweak layout css
* Centralize confirmations into a component
* Allow switching between the old and new UI with the CONSUL_UI_BETA env var
Currently all the assets are packaged into a single AssetFS and a prefix is configured to switch between the two.
* Attempt at some updates to integrate the v2 ui build into the main infrastructure
* Add redirect to index.html for unknown paths
* Allow redictor to /index.html for new ui when using -ui-dir
* Take ACLs to the correct place on save
* First pass breadcrumbs
* Remove datacenter selector on the index page
* Tweak overall layout
* Make buttons 'resets'
* Tweak last DC stuff
* Validations plus kv keyname viewing tweaks
* Pull sessions back in
* Tweak the env vars to be more reusable
* Move isAnon to the view
* No items and disabled acl css
* ACL and KV details
1. Unauthorized page
2. Make sure the ACL is always selected when it needs it
3. Check record deletion with a changeset
* Few more acl tweaks/corrections
* Add no items view to node > services
* Tags for node > services
* Make sure we have tags
* Fix up the labels on the tomography graph
* Add node link (agent) to kv sessions
* Duplicate up `create` for KV 'root creation'
* Safety check for health checks
* Fix up the grids
* Truncate td a's, fix kv columns
* Watch for spaces in KV id's
* Move actions to their own mixins for now at least
* Link reset to settings incase I want to type it in
* Tweak error page
* Cleanup healthcheck icons in service listing
* Centralize errors and make getting back easier
* Nice numbers
* Compact buttons
* Some incidental css cleanups
* Use 'Key / Value' for root
* Tweak tomography layout
* Fix single healthcheck unhealthy resource
* Get loading screen ready
* Fix healthy healthcheck tick
* Everything in header starts white
* First draft loader
* Refactor the entire backend to use proper unique keys, plus..
1. Make unique keys form dc + slug (uid)
2. Fun with errors...
* Tweak header colors
* Add noopener noreferrer to external links
* Add supers to setupController
* Implement cloning, using ember-data...
* Move the more expensive down the switch order
* First draft empty record cleanup..
* Add the cusomt store test
* Temporarily use the htmlSafe prototype to remove the console warning
* Encode hashes in urls
* Go back to using title for errors for now
* Start removing unused bulma
* Lint
* WIP: Start looking at failing tests
* Remove single redirect test
* Finish off error message styling
* Add full ember-data cache invalidation to avoid stale data...
* Add uncolorable warning icons
* More info icon
* Rearrange single service, plus tag printing
* Logo
* No quotes
* Add a simple startup logo
* Tweak healthcheck statuses
* Fix border-color for healthchecks
* Tweak node tabs
* Catch 401 ACL errors and rethrow with the provided error message
* Remove old acl unauth and error routes
* Missed a super
* Make 'All' refer to number of checks, not services
* Remove ember-resizer, add autoprefixer
* Don't show tomography if its not worth it, viewify it more also
* Little model cleanup
* Chevrons
* Find a way to reliably set the class of html from the view
* Consistent html
* Make sure session id's are visible as long as possible
* Fix single service check count
* Add filters and searchs to the query string
* Don't remember the selected tab
* Change text
* Eror tweaking
* Use chevrons on all breadcrumbs even in kv's
* Clean up a file
* Tweak some messaging
* Makesure the footer overlays whats in the page
* Tweak KV errors
* Move json toggle over to the right
* feedback-dialog along with copy buttons
* Better confirmation dialogs
* Add git sha comment
* Same title as old UI
* Allow defaults
* Make sure value is a string
* WIP: Scrolling dropdowns/confirmations
* Add to kv's
* Remove set
* First pass trace
* Better table rows
* Pull over the hashi code editor styles
* Editor tweaks
* Responsive tabs
* Add number formatting to tomography
* Review whats left todo
* Lint
* Add a coordinate ember data triplet
* Bump in a v2.0.0
* Update old tests
* Get coverage working again
* Make sure query keys are also encoded
* Don't test console.error
* Unit test some more utils
* Tweak the size of the tabular collections
* Clean up gitignore
* Fix copy button rollovers
* Get healthcheck 'icon icons' onto the text baseline
* Tweak healthcheck padding and alignment
* Make sure commas kick in in rtt, probably never get to that
* Improve vertical menu
* Tweak dropdown active state to not have a bg
* Tweak paddings
* Search entire string not just 'startsWith'
* Button states
* Most buttons have 1px border
* More button tweaks
* You can only view kv folders
* CSS cleanup reduction
* Form input states and little cleanup
* More CSS reduction
* Sort checks by importance
* Fix click outside on datacenter picker
* Make sure table th's also auto calculate properly
* Make sure `json` isn't remembered in KV editing
* Fix recursive deletion in KV's
* Centralize size
* Catch updateRecord
* Don't double envode
* model > item consistency
* Action loading and ACL tweaks
* Add settings dependencies to acl tests
* Better loading
* utf-8 base64 encode/decode
* Don't hang off a prototype for htmlSafe
* Missing base64 files...
* Get atob/btoa polyfill right
* Shadowy rollovers
* Disabled button styling for primaries
* autofocuses only onload for now
* Fix footer centering
* Beginning of 'notices'
* Remove the isLocked disabling as we are letting you do what the API does
* Don't forget the documentation link for sessions
* Updates are more likely
* Use exported constant
* Dont export redirectFS and a few other PR updates
* Remove the old bootstrap config which was used for the old UI skin
* Use curlies for multiple properties
* Removes unnecessary set for model component which will be null.
* Returns a 404 for a missing node, not a 200 with an empty response.
* Updates built-in web assets.
* Removes GitHub reference.
* Doesn't display ACL token on the unauthorized page.
* Removes useless fetch for nodes and cleans up comments.
* Provides a path to reset the ACL token when it's invalid.
This included making the settings page global so it's reachable, and adding
some more information about an error on the error page.
* Updates built-in web assets.
JSON validation has now been added to the update view following the same format
as create. Since 'valueDecoded' does not have the ability to check if the value
is base64 before decoding then this must be checked first; if it is base64 then
use the decoded one, if not just get the value.
Change incorrect trailing span close to label.
JSON validation added to UI. This has been implemented through the use of a flag
to enable/disable the functionality with a watcher on the value to set the
success/error class on the textarea itself.
No hard validation added to the field.
ui: Add and update favicons
* Add most popular device/size favicon combinations
* Update existing favicons
* Change permissions to 0644 on static assets
Fixes#2945
* update libv8 gem to something that compiles
* properly escape session and acl data in UI
fixes an XSS vulnerability caused by having the sessionName, sessionMeta, and aclName blindly returning data as Handlebars.SafeStrings
Adds a new section to the node information, Network Tomography. There's a radar
plot of the distances (in ms) between the current node and its peers as well as
min, avg, and max.
If the token argument to formatURL is null, it should be rendered as the
empty string and not the string 'null'.
Should fix#1316 in which Safari gets a 403 error when visiting the
key/value page in the web UI.
Add an config object that allows adding HTTP header response fields to every
HTTP API response.
Each specified header is added to every response from all HTTP API endpoints.
Each individual endpoint may overwrite the specified header, which makes sure
that Consul headers such as 'X-Consul-Index' is enforced by the API.
John Cowen