Ring Google Group

[ANN] clj-webjars

2013-05-20T02:54:08Z

Hi,
I released a middleware to facilitate webjars <[link]>integration with ring.
Essentially it allows to serve assets from jar dependencies, abstracts
client from asset versions and honors http caching semantics.
You can find it here: [link]
Hope it helps!

Asynchronous Responses in Ring

2013-05-10T15:00:36Z

I have an app, where the ring handler needs to make an asynchronous call to
an outside system. So ...
*i)* my web client would make a call.
*ii)* A ring handler would be invoked and the outside system called.
*iii)* After the ring handler function has exited, some prior handler-fn
would get a response.

Exceptions

2013-05-08T09:40:43Z

Hello
I have a question. Why exception display only once and disappear when I
refresh a browser?
Thanks!

NullPointerException with large file and multipart params

2013-05-02T03:13:30Z

I can successfully upload files around 80mb, but when I've tried a file
that is over 2GB I get this stack trace:
java.lang.NullPointerException
at
ring.middleware.multipart_para ms$request_context$reify__1899 .getContentLength(multipart_pa rams.clj:23)
at
org.apache.commons.fileupload. FileUploadBase$FileItemIterato rImpl.<init>(FileUploadBase.ja va:936)

Re: Xss library

2013-04-24T21:52:48Z

What do you mean by "call functions only when the data is being output"?

Could you provide some sort of an example to illustrate what you mean?

I'm also uncertain why you'd expect XSS attacks to come from data in the
session store. That seems somewhat unusual.

- James

Is it possible to use Ring in an already existing Javaee project?

2013-04-18T20:10:53Z

We already have an existing application with EJBs, a WAR and an EAR. I've
already written a proof of concept of this new feature in javaee code. The
proof of concept is a new WAR that runs inside the EAR and the WAR uses
basic auth (with a filter) and calls the already existing EJBs .
I'm wondering if it's possible to rewrite this proof of concept in Ring

[ANN] ring-rewrite 0.1.0

2013-04-06T20:51:32Z

Ring middleware for defining and applying rewrite/redirect rules. In many cases you can get away with ring-rewrite instead of writing Apache mod_rewrite rules. Based on rack-rewrite, but with a Clojure flavor.
[link]
(def redirect-handler
(fn [req]
(wrap-rewrite req

Problem with static resources from webjars in a Ring app

2013-04-06T10:32:02Z

Dear all,
I've added a static resource from webjars to my project.clj:
[org.webjars/bootstrap "2.3.1"]
which also pulls in [org.webjars/jquery "1.9.0"].
To make these available I have added this to my middleware:
(resource/wrap-resource "/META-INF/resources/")
Since I've done this, a GET request to "/" returns an empty page. After

what are some common Jetty and Ring configurations and deployments?

2013-03-29T00:43:23Z

I have very little experience with Java, the JVM, or the Java libraries
that Clojure often relies on. I am curious what other people are doing to
deploy their web apps? Is it common to use Jetty/Ring with Tomcat? What
about Jboss? Are any folks using a simple uberjar on sites with a lot of
traffic? Are there common configurations tweaks that "everyone" knows to

Apache Benchmark kills Ring/Jetty at high levels of concurrency - easy fix?

2013-03-25T19:58:41Z

I am still learning my way here. I have a simple Ring/Jetty app, I put it
on one server and start it, then I ssh to another server and hit it with
Apache Benchmark. It seems to be if the concurrency is too high (on ab)
then Jetty starts to fail -- 500 errors.
Is there an easy fix? Can I just give the app more memory as a JVM options

[ANN] uWSGI support for ring (early stage)

2013-03-08T14:37:45Z

Hi, folks,

Yesterday uWSGI had released a ring plugins to give basic support for
Clojure webdev.

- [link]
- [link]
- [link]
- [link]

Introducing Ganelon - micro-framework support AJAX in Ring web apps

2013-03-11T20:11:53Z

*Hi,
I've recently published a simple open source micro-framework which allows
server-side Clojure code to update web page content or invoke any
JavaScript operations dynamically through XHR requests and thin JavaScript
layer. *
*
Ganelon is fully Ring compatible and based on Compojure and lib-noir. Being

no headers with Ring response?

2013-02-19T19:16:11Z

I am trying to figure out what work is handled by Ring and what work
is left to the webserver (in my case, Jetty).

I look here:

[link]

and read:

"Returns a skeletal Ring response with the given body, status of 200,
and no headers."

Why does my Ring middleware not see the :params map in the request?

2013-02-19T01:03:32Z

I'm writing a Ring middleware, and also using Compojure. I want my
middleware to look in the :params map to see if a specific key was provided
by the user. In my middleware function, the request map does not contain a
I'm thinking the :params map it not being set before my custom middleware,
but I can't figure out how to get it to actually be set.

[ANN] ring-ratelimit 0.2.0 - Powerful request rate limiting middleware

2013-02-15T13:34:20Z

Hello everyone!
I've just released ring-ratelimit 0.2.0.
[link]
This is a powerful rate limiting middleware.
By "powerful" I mean it allows you to compose limits like Ring middleware.
Out of the box, it can limit by IP address, any header value, any param,
user and user with role (Friend authentication).

Help on drafting a protocol for realtime communication between client and ring server

2013-02-15T09:55:38Z

Hi,
This post was accidentally posted on the Clojure group, even though the
intension was on this group. If you receive both of them, sorry for
the noise.
I am trying to draft a protocol for realtime communication between client
and ring server.
http-kit <[link]> try to implement the protocol, provide a

ANN: http-kit 2.0.0.RC2, high performance HTTP Server & Client for Clojure

2013-02-03T03:20:27Z

Hi,

After extensive test, known bugs fixed, documentation ready, http-kit
reaches 2.0.0.RC2

[http-kit "2.0.0-RC2"] ; Add to your project.clj

Documentation: [link]
Github: [link]

The goal of http-kit is to provide a clean, robust HTTP server/client, with

Incorrect ring.middleware.etags 1.0.0-SNAPSHOT in Clojars

2013-01-31T14:18:46Z

Hi all,
I've been trying to use ring.middleware.etags from Clojars<[link]>with Compojure to add an ETag header to HTTP responses. The middleware
function I want to use is ring.middleware.etags.core/wit h-etag-cache<[link]>,

canonical unicode

2013-01-30T21:41:11Z

Hello,
My understanding (possibly wrong) is that Ring will decode headers, url,
and posts as UTF-8, however I cannot find anywhere if this is NFC UTF-8 or
any other forced canonicalization?
For example there are numerous ways to encode ".." in UTF-8
see this for more discussion:
[link]

What is the cannonical way of implementing a 'remember me' button?

2013-01-30T11:41:05Z

I was thinking about adding a 'remember me' button to Friend, but it is not
that much related to that library.
To change the session cookie expiry date I need to pass a special parameter
to the wrapper:
(def app
(wrap-session handler {:cookie-attrs {:max-age 3600}}))
but I need to do that from the handler itself - because I want to add it

[ANN] ring-jdbc-session 0.1.0 - JDBC backed session store

2013-01-26T07:56:19Z

Hi,
I am happy to announce the release of `ring-jdbc-session` 0.1.0, which is
an implementation of Ring's SessionStore. It also supports cleanup of stale
session entries and is described in the README.
[link]
Please let me know what you think.
Shantanu

A new session cookie on each request

2013-01-26T07:51:17Z

What is the difference between:
(def app
(wrap-session handler))
and
(defn app-bad [request]
((wrap-session handler) request))
?
I was thinking that the second exactly the same function - but apparently
in that case the wrapper sets a new session cookie on each request. When I
reload the page and view the headers I can see that each response has

Secure Header Middleware for Ring

2013-01-26T07:20:34Z

Hi,
I have started working on a library to add http security header information
to the HTTP headers. I am trying to achieve something similar
to [link].
The current source is at:
[link].
Do you all think this will be useful for the ring community? I am a novice

Session set only once

2013-01-20T10:47:33Z

I have to admit that I've started learning clojure this Friday - so this
might be some stupid mistake, but it is driving me crazy.
Here is my application:
(ns login-app.ex)
(use 'ring.middleware.session
'ring.util.response)
(defn handl [{session :session uri :uri headers :headers}]
(let [body

Lein Ring Plugin -- Reloading Resources

2013-01-17T01:45:55Z

Hi,
I'm using the lein ring plugin <[link]>.
I I was under the impression that "lein ring server" would launch a
development web server and reload resources and their dependencies when
modified. The command does launch a web server and reload modified *.clj
source files, but modified resources such as template (*.html) files are

Serving a PDF with Ring

2013-01-13T10:44:05Z

I wish to serve a PDF (or any other binary file) in a ring response. This
works
(defn serve-file [request]
{:status 200
:headers {"Content-Type" "application/pdf"}
:body (FileInputStream. "file.pdf")})
But I'm not explicitly closing the FileInputStream. Will this cause a
memory leak, or is it closed by the underlying web server (Jetty). If not,

[ANN] Ring 1.0.3 / 1.1.7 released to fix security flaw

2013-01-12T23:34:44Z

There is a vulnerability in the ring.middleware.session.cookie namespace
that affects Ring sites using the cookie session store.

Versions affected: 1.0.0 to 1.1.6

Fixed versions: 1.0.3, 1.1.7

*Overview*

In order for an attacker exploit this flaw, your site must be using the
cookie session store, and the attacker must have gained the capability to

Exception: "No single method: read_session of interface"

2013-01-09T20:56:51Z

I am somewhat new to Clojure. I apologize if this is a dumb question.

I have an ns declaration that contains:

(:use [net.cgrand.moustache :only [app delegate]]
[ring.util.response]
[ring.middleware.params]
[ring.middleware.file]
[ring.middleware.resource]

Revisiting :uri, :context, and :path-info

2013-01-02T19:33:33Z

Hi all,
It's been over 2 years since adding :path-info and :context to the Ring
spec was discussed. Do we feel like it makes sense yet? :-)
In Immutant, we would prefer to recommend folks use the Ring middleware,
wrap-resource or wrap-file, to serve static assets, but since those
functions use :uri, this only works when apps are deployed at the root

Updating the minimum Clojure version for Ring 1.2

2012-12-31T18:03:46Z

Hi folks,

I'm planning on releasing Ring 1.2 at the end of January, and with Clojure
1.5 in release candidate, I'm wondering about updating the minimum Clojure
dependency from 1.2.1 to 1.3.0.

Does anyone use Ring 1.1 with Clojure 1.2? Would moving to Clojure 1.3
significantly impact you?

Last-Modified headers

2012-12-21T13:21:10Z

I serve most of my static content using wrap-resource from an uber-jar, and
I'm wanting a solution for handling Last-Modified and 304 responses.
I have a patch, but I was thinking it might be worth discussing first...
Current status:
* The wrap-not-modified middleware is great, but currently
resource-response doesn't add any Last-Modified headers except for file://

Contributing to Ring; ServletConfig init parameters as hash

2012-12-06T20:51:47Z

I've been digging into the actual Java side of Servlets for work, and so
I've been hankerin' to apply this knowledge to Ring's development. Thus my
first question is a general, "How can I help? What does Ring need?"
Also, has anyone *already* written anything that allows easy access to the
ServletContext or ServletConfig parameters?

Content type for ANY file type

2012-12-02T18:56:01Z

Is it possible to have a content type (or is there an approach) where I can
return any type of file?
My situation is this:
I allow users to upload any type of file, but how do I allow for
downloading/responding for any type of file? Or am I forced to detect the
file type and restrict the type of file?

Question on porting Ring to ClojureCLR

2012-11-19T06:59:46Z

Hi,

I am interested to know if anybody has tried porting Ring to
ClojureCLR yet. If not, I might give it a shot -- (1) port ring-core,
(2) write an adapter.

Also, it would be great if anybody can throw pointers related to the
objective.

Shantanu

ring-core dependency on clj-time

2012-11-11T09:00:34Z

I'm a little puzzled why ring-core has a dependency on clj-time (and
transitively on joda time).
This seems to only be required for supporting cookies with joda-time
intervals and dates for :max-age and :expires, and was introduced as a fix
for this issue:
[link]

ring-simpleweb-adapter

2012-11-10T10:57:17Z

Hi,
I've just put together a new ring adapter for the Simple web framework http
engine.
[link]
The adapter aims to be a near-enough drop-in replacement for the
ring-jetty-adapter (although I don't support https just yet).
If anyone has an established ring/compojure codebase (with tests) I'd be

Correct namespace for new ring adapters

2012-11-06T16:07:26Z

I'm thinking of throwing a couple of ring adapters together for some of the
as-yet-unsupported lightweight Java web frameworks.
Is there a standard of name-spacing ring adapters under
ring/ring-xyz-adapter ( e.g. [link] or
[link] ) or are you expecting

Bug when using JodaTime to set :expires attribute for cookies?

2012-10-29T16:46:30Z

When setting the :expires attribute for cookies by passing it a JodaTime
date, the cookies don't seem to persist across browser sessions. I am not
sure if this a bug with ring or with noir (which is what I am using). But
just wanted to give you a heads up. Details can be found in the Noir
discussion group. See this thread:

How to access raw Jetty request?

2012-10-22T21:01:34Z

I need to use
[link]() to
get the locale from the Accept-Language string.
How do I access the Jetty request directly for this in ring?

Pull request: Add Cache-Control: public header to wrap-file-info response

2012-10-15T13:25:28Z

Hi James,
I've just put in a 1-line pull request
here: [link]
As discussed in the commit message and reference, this is always a
performance win in the context it's being used here - especially for files
being served over HTTPS.
I didn't change the doc-string since this seems more like an implementation

Re: :ssl-client-cert always nil

2012-10-12T15:52:00Z

Have you set the :client-auth option on the Jetty adapter to :want or :need?

- James

Comet/async support

2012-10-03T07:53:19Z

Good day.
Does ring provides support for http push currently ? I found old thread
about this, but it's few years old.
Now i'm considering to write some kind of wrapper around grizzly framework
or jetty continuations, but maybe there is more sane solution exist ?

[ANN] Friend 0.1.2 released (web authentication/authorization library)

2012-10-02T23:47:12Z

I released [com.cemerick/friend "0.1.2"] to Clojars this afternoon. Friend is an extensible authentication and authorization library for Clojure Ring web applications and services:

[link]

This release fixes a couple of serious bugs with Friend's handling of Ring sessions, among a few other more minor issues and a couple of minor enhancements. The changelog is here:

Maintaining global state across user sessions

2012-09-13T10:16:16Z

Hi,
I have a need to maintain global state on the server across different
browser / user sessions.
My assumption here is that all atoms etc created when a request comes in is
specific to that request. Once the response is returned all that state is
destroyed and memory freed. Please correct me if I am wrong.

Producing resource responses from ring with a sane Last-Modified header

2012-09-06T12:55:41Z

I've been experimenting with packaging JavaScript/CSS libraries so as to reuse the Leiningen/Maven infrastructure (rather than dumping libraries and frameworks like jQuery, Foundation, et al. into my web projects' git repositories).

This has worked out spectacularly well in terms of simplifying project organization and further aiding my general level of sanity. However, there is a caveat: Ring does not currently add a Last-Modified header to responses for jarred resources loaded from the classpath, thus making such resources generally uncacheable and preventing later requests from being responded to with a 304 Not Modified status.

ANN: Friend 0.1.0 released (web authentication/authorization library)

2012-08-29T12:39:51Z

I released [com.cemerick/friend "0.1.0"] to Clojars last night. Friend is an extensible authentication and authorization library for Clojure Ring web applications and services:

[link]

This release does make some breaking changes, though all unfortunately necessary. The changelog since the 0.0.9 release is here:

Compiling starts jetty server, so I can't complete Uberjar

2012-08-20T06:07:50Z

Hi:
I'm a newbie to ring development, and I'm trying to uberjar up what little I've got developed so far so I can put it out on a demo server. But when I run lein1 uberjar, the process involves compiling the code, and when it compiles, for some reason it seems to automatically invoke the server, so the uberjar never completes.... everything just locks up while my server sits there listening on port 8080, from which I have to Ctrl-C to kill.

init function when deploying war in Tomcat server

2012-08-10T06:31:21Z

I am having trouble getting the init function to work when on a Tomcat server.
When using 'lein ring server' it gets called fine, but when doing a 'lein ring war' and deploying it in a Tomcat 7 server it does not get called.
From my project.clj:
:servlet-path-info? false
:web-xml "resources/web.xml"

wrap-keyword-params doesn't convert params with "."

2012-07-31T14:36:56Z

Hi
The wrap-keyword-params middleware doesn't convert parameters that contain
a "." to a keyword. This tripped me up when I was looking for the parameter
"openid.mode" assuming it would be available as a keyword.
Is the reason that this isn't converted to a keyword because of the
description in the clojure reader docs ([link]) that

Upgrading seems to have introduced logger dependency problems.

2012-07-26T22:06:15Z

Help! I'm in logger dependency hell!
I'm encoutering this error when I execute compojure-based code that used to
work fine, until I upgraded my clojure version (1.2->1.3) and libraries,
including compojure and its associates (compojure & ring 1.1.1. hiccup
1.0.0)
Here's the relevant part of the stack trace: