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Diffstat (limited to 'vendor/github.com/gorilla/context/doc.go')
-rw-r--r-- | vendor/github.com/gorilla/context/doc.go | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/vendor/github.com/gorilla/context/doc.go b/vendor/github.com/gorilla/context/doc.go deleted file mode 100644 index 448d1bfcac..0000000000 --- a/vendor/github.com/gorilla/context/doc.go +++ /dev/null @@ -1,88 +0,0 @@ -// Copyright 2012 The Gorilla Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -/* -Package context stores values shared during a request lifetime. - -Note: gorilla/context, having been born well before `context.Context` existed, -does not play well > with the shallow copying of the request that -[`http.Request.WithContext`](https://golang.org/pkg/net/http/#Request.WithContext) -(added to net/http Go 1.7 onwards) performs. You should either use *just* -gorilla/context, or moving forward, the new `http.Request.Context()`. - -For example, a router can set variables extracted from the URL and later -application handlers can access those values, or it can be used to store -sessions values to be saved at the end of a request. There are several -others common uses. - -The idea was posted by Brad Fitzpatrick to the go-nuts mailing list: - - http://groups.google.com/group/golang-nuts/msg/e2d679d303aa5d53 - -Here's the basic usage: first define the keys that you will need. The key -type is interface{} so a key can be of any type that supports equality. -Here we define a key using a custom int type to avoid name collisions: - - package foo - - import ( - "github.com/gorilla/context" - ) - - type key int - - const MyKey key = 0 - -Then set a variable. Variables are bound to an http.Request object, so you -need a request instance to set a value: - - context.Set(r, MyKey, "bar") - -The application can later access the variable using the same key you provided: - - func MyHandler(w http.ResponseWriter, r *http.Request) { - // val is "bar". - val := context.Get(r, foo.MyKey) - - // returns ("bar", true) - val, ok := context.GetOk(r, foo.MyKey) - // ... - } - -And that's all about the basic usage. We discuss some other ideas below. - -Any type can be stored in the context. To enforce a given type, make the key -private and wrap Get() and Set() to accept and return values of a specific -type: - - type key int - - const mykey key = 0 - - // GetMyKey returns a value for this package from the request values. - func GetMyKey(r *http.Request) SomeType { - if rv := context.Get(r, mykey); rv != nil { - return rv.(SomeType) - } - return nil - } - - // SetMyKey sets a value for this package in the request values. - func SetMyKey(r *http.Request, val SomeType) { - context.Set(r, mykey, val) - } - -Variables must be cleared at the end of a request, to remove all values -that were stored. This can be done in an http.Handler, after a request was -served. Just call Clear() passing the request: - - context.Clear(r) - -...or use ClearHandler(), which conveniently wraps an http.Handler to clear -variables at the end of a request lifetime. - -The Routers from the packages gorilla/mux and gorilla/pat call Clear() -so if you are using either of them you don't need to clear the context manually. -*/ -package context |