gin

package module
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 Go to latest Published: Oct 13, 2016 License: MIT Imports: 31 Imported by: 0

README

forked from gin-gonic/gin.

Documentation

Index

Constants

View Source 
const (
	MIMEJSON              = binding.MIMEJSON
	MIMEHTML              = binding.MIMEHTML
	MIMEXML               = binding.MIMEXML
	MIMEXML2              = binding.MIMEXML2
	MIMEPlain             = binding.MIMEPlain
	MIMEPOSTForm          = binding.MIMEPOSTForm
	MIMEMultipartPOSTForm = binding.MIMEMultipartPOSTForm
)

Content-Type MIME of the most common data formats

View Source 
const (
	DebugMode   string = "debug"
	ReleaseMode string = "release"
	TestMode    string = "test"
)
View Source 
const AuthUserKey = "user"
View Source 
const BindKey = "_gin-gonic/gin/bindkey"
View Source 
const ENV_GIN_MODE = "GIN_MODE"
View Source 
const Version = "v1.0rc2"

Version is Framework's version

Variables

View Source 
var DefaultErrorWriter io.Writer = os.Stderr
View Source 
var DefaultWriter io.Writer = os.Stdout

DefaultWriter is the default io.Writer used the Gin for debug output and middleware output like Logger() or Recovery(). Note that both Logger and Recovery provides custom ways to configure their output io.Writer. To support coloring in Windows use: 

import "github.com/mattn/go-colorable"
gin.DefaultWriter = colorable.NewColorableStdout()

Functions

func Dir 

func Dir(root string, listDirectory bool) http.FileSystem

Dir returns a http.Filesystem that can be used by http.FileServer(). It is used interally in router.Static(). if listDirectory == true, then it works the same as http.Dir() otherwise it returns a filesystem that prevents http.FileServer() to list the directory files.

func DisableBindValidation 

func DisableBindValidation()

func IsDebugging 

func IsDebugging() bool

IsDebugging returns true if the framework is running in debug mode. Use SetMode(gin.Release) to switch to disable the debug mode.

func Mode 

func Mode() string

func SetMode 

func SetMode(value string)

Types

type Accounts 

type Accounts map[string]string

type Context 

type Context struct {
	Request *http.Request
	Writer  ResponseWriter

	Params Params

	Keys     map[string]interface{}
	Errors   errorMsgs
	Accepted []string
	// contains filtered or unexported fields
}

Context is the most important part of gin. It allows us to pass variables between middleware, manage the flow, validate the JSON of a request and render a JSON response for example.

func (*Context) Abort 

func (c *Context) Abort()

Abort prevents pending handlers from being called. Note that this will not stop the current handler. Let's say you have an authorization middleware that validates that the current request is authorized. If the authorization fails (ex: the password does not match), call Abort to ensure the remaining handlers for this request are not called.

func (*Context) AbortWithError 

func (c *Context) AbortWithError(code int, err error) *Error

AbortWithError calls `AbortWithStatus()` and `Error()` internally. This method stops the chain, writes the status code and pushes the specified error to `c.Errors`. See Context.Error() for more details.

func (*Context) AbortWithStatus 

func (c *Context) AbortWithStatus(code int)

AbortWithStatus calls `Abort()` and writes the headers with the specified status code. For example, a failed attempt to authentificate a request could use: context.AbortWithStatus(401).

func (*Context) Bind 

func (c *Context) Bind(obj interface{}) error

Bind checks the Content-Type to select a binding engine automatically, Depending the "Content-Type" header different bindings are used: 

"application/json" --> JSON binding
"application/xml"  --> XML binding

otherwise --> returns an error It parses the request's body as JSON if Content-Type == "application/json" using JSON or XML as a JSON input. It decodes the json payload into the struct specified as a pointer. Like ParseBody() but this method also writes a 400 error if the json is not valid.

func (*Context) BindJSON 

func (c *Context) BindJSON(obj interface{}) error

BindJSON is a shortcut for c.BindWith(obj, binding.JSON)

func (*Context) BindWith 

func (c *Context) BindWith(obj interface{}, b binding.Binding) error

BindWith binds the passed struct pointer using the specified binding engine. See the binding package.

func (*Context) ClientIP 

func (c *Context) ClientIP() string

ClientIP implements a best effort algorithm to return the real client IP, it parses X-Real-IP and X-Forwarded-For in order to work properly with reverse-proxies such us: nginx or haproxy.

func (*Context) ContentType 

func (c *Context) ContentType() string

ContentType returns the Content-Type header of the request.

func (*Context) Cookie 

func (c *Context) Cookie(name string) (string, error)

func (*Context) Copy 

func (c *Context) Copy() *Context

Copy returns a copy of the current context that can be safely used outside the request's scope. This have to be used then the context has to be passed to a goroutine.

func (*Context) Data 

func (c *Context) Data(code int, contentType string, data []byte)

Data writes some data into the body stream and updates the HTTP code.

func (*Context) Deadline 

func (c *Context) Deadline() (deadline time.Time, ok bool)

func (*Context) DefaultPostForm 

func (c *Context) DefaultPostForm(key, defaultValue string) string

DefaultPostForm returns the specified key from a POST urlencoded form or multipart form when it exists, otherwise it returns the specified defaultValue string. See: PostForm() and GetPostForm() for further information.

func (*Context) DefaultQuery 

func (c *Context) DefaultQuery(key, defaultValue string) string

DefaultQuery returns the keyed url query value if it exists, othewise it returns the specified defaultValue string. See: Query() and GetQuery() for further information. 

GET /?name=Manu&lastname=
c.DefaultQuery("name", "unknown") == "Manu"
c.DefaultQuery("id", "none") == "none"
c.DefaultQuery("lastname", "none") == ""

func (*Context) Done 

func (c *Context) Done() <-chan struct{}

func (*Context) Err 

func (c *Context) Err() error

func (*Context) Error 

func (c *Context) Error(err error) *Error

Attaches an error to the current context. The error is pushed to a list of errors. It's a good idea to call Error for each error that occurred during the resolution of a request. A middleware can be used to collect all the errors and push them to a database together, print a log, or append it in the HTTP response.

func (*Context) File 

func (c *Context) File(filepath string)

File writes the specified file into the body stream in a efficient way.

func (*Context) Get 

func (c *Context) Get(key string) (value interface{}, exists bool)

Get returns the value for the given key, ie: (value, true). If the value does not exists it returns (nil, false)

func (*Context) GetCookie 

func (c *Context) GetCookie(name string) (string, error)

func (*Context) GetPostForm 

func (c *Context) GetPostForm(key string) (string, bool)

GetPostForm is like PostForm(key). It returns the specified key from a POST urlencoded form or multipart form when it exists `(value, true)` (even when the value is an empty string), otherwise it returns ("", false). For example, during a PATCH request to update the user's email: 

email=mail@example.com  -->  ("mail@example.com", true) := GetPostForm("email") // set email to "mail@example.com"
email=  			  	-->  ("", true) := GetPostForm("email") // set email to ""
					 	-->  ("", false) := GetPostForm("email") // do nothing with email

func (*Context) GetQuery 

func (c *Context) GetQuery(key string) (string, bool)

GetQuery is like Query(), it returns the keyed url query value if it exists `(value, true)` (even when the value is an empty string), othewise it returns `("", false)`. It is shortcut for `c.Request.URL.Query().Get(key)` 

GET /?name=Manu&lastname=
("Manu", true) == c.GetQuery("name")
("", false) == c.GetQuery("id")
("", true) == c.GetQuery("lastname")

func (*Context) HTML 

func (c *Context) HTML(code int, name string, obj interface{})

HTML renders the HTTP template specified by its file name. It also updates the HTTP code and sets the Content-Type as "text/html". See http://golang.org/doc/articles/wiki/

func (*Context) HandlerName 

func (c *Context) HandlerName() string

HandlerName returns the main handler's name. For example if the handler is "handleGetUsers()", this function will return "main.handleGetUsers"

func (*Context) Header 

func (c *Context) Header(key, value string)

Header is a intelligent shortcut for c.Writer.Header().Set(key, value) It writes a header in the response. If value == "", this method removes the header `c.Writer.Header().Del(key)`

func (*Context) IndentedJSON 

func (c *Context) IndentedJSON(code int, obj interface{})

IndentedJSON serializes the given struct as pretty JSON (indented + endlines) into the response body. It also sets the Content-Type as "application/json". WARNING: we recommend to use this only for development propuses since printing pretty JSON is more CPU and bandwidth consuming. Use Context.JSON() instead.

func (*Context) IsAborted 

func (c *Context) IsAborted() bool

IsAborted returns true if the current context was aborted.

func (*Context) JSON 

func (c *Context) JSON(code int, obj interface{})

JSON serializes the given struct as JSON into the response body. It also sets the Content-Type as "application/json".

func (*Context) MustGet 

func (c *Context) MustGet(key string) interface{}

MustGet returns the value for the given key if it exists, otherwise it panics.

func (*Context) Negotiate 

func (c *Context) Negotiate(code int, config Negotiate)

func (*Context) NegotiateFormat 

func (c *Context) NegotiateFormat(offered ...string) string

func (*Context) Next 

func (c *Context) Next()

Next should be used only inside middleware. It executes the pending handlers in the chain inside the calling handler. See example in github.

func (*Context) Param 

func (c *Context) Param(key string) string

Param returns the value of the URL param. It is a shortcut for c.Params.ByName(key) 

router.GET("/user/:id", func(c *gin.Context) {
	// a GET request to /user/john
	id := c.Param("id") // id == "john"
})

func (*Context) PostForm 

func (c *Context) PostForm(key string) string

PostForm returns the specified key from a POST urlencoded form or multipart form when it exists, otherwise it returns an empty string `("")`.

func (*Context) Query 

func (c *Context) Query(key string) string

Query returns the keyed url query value if it exists, othewise it returns an empty string `("")`. It is shortcut for `c.Request.URL.Query().Get(key)` 

GET /path?id=1234&name=Manu&value=
c.Query("id") == "1234"
c.Query("name") == "Manu"
c.Query("value") == ""
c.Query("wtf") == ""

func (*Context) Redirect 

func (c *Context) Redirect(code int, location string)

Redirect returns a HTTP redirect to the specific location.

func (*Context) Render 

func (c *Context) Render(code int, r render.Render)

func (*Context) SSEvent 

func (c *Context) SSEvent(name string, message interface{})

SSEvent writes a Server-Sent Event into the body stream.

func (*Context) Set 

func (c *Context) Set(key string, value interface{})

Set is used to store a new key/value pair exclusivelly for this context. It also lazy initializes c.Keys if it was not used previously.

func (*Context) SetAccepted 

func (c *Context) SetAccepted(formats ...string)

func (*Context) SetCookie 

func (c *Context) SetCookie(
	name string,
	value string,
	maxAge int,
	path string,
	domain string,
	secure bool,
	httpOnly bool,
)

func (*Context) Status 

func (c *Context) Status(code int)

func (*Context) Stream 

func (c *Context) Stream(step func(w io.Writer) bool)

func (*Context) String 

func (c *Context) String(code int, format string, values ...interface{})

String writes the given string into the response body.

func (*Context) Value 

func (c *Context) Value(key interface{}) interface{}

func (*Context) XML 

func (c *Context) XML(code int, obj interface{})

XML serializes the given struct as XML into the response body. It also sets the Content-Type as "application/xml".

func (*Context) YAML 

func (c *Context) YAML(code int, obj interface{})

YAML serializes the given struct as YAML into the response body.

type Engine 

type Engine struct {
	RouterGroup
	HTMLRender render.HTMLRender

	// Enables automatic redirection if the current route can't be matched but a
	// handler for the path with (without) the trailing slash exists.
	// For example if /foo/ is requested but a route only exists for /foo, the
	// client is redirected to /foo with http status code 301 for GET requests
	// and 307 for all other request methods.
	RedirectTrailingSlash bool

	// If enabled, the router tries to fix the current request path, if no
	// handle is registered for it.
	// First superfluous path elements like ../ or // are removed.
	// Afterwards the router does a case-insensitive lookup of the cleaned path.
	// If a handle can be found for this route, the router makes a redirection
	// to the corrected path with status code 301 for GET requests and 307 for
	// all other request methods.
	// For example /FOO and /..//Foo could be redirected to /foo.
	// RedirectTrailingSlash is independent of this option.
	RedirectFixedPath bool

	// If enabled, the router checks if another method is allowed for the
	// current route, if the current request can not be routed.
	// If this is the case, the request is answered with 'Method Not Allowed'
	// and HTTP status code 405.
	// If no other Method is allowed, the request is delegated to the NotFound
	// handler.
	HandleMethodNotAllowed bool
	ForwardedByClientIP    bool
	// contains filtered or unexported fields
}

Engine is the framework's instance, it contains the muxer, middleware and configuration settings. Create an instance of Engine, by using New() or Default()

func Default 

func Default() *Engine

Default returns an Engine instance with the Logger and Recovery middleware already attached.

func New 

func New() *Engine

New returns a new blank Engine instance without any middleware attached. By default the configuration is: - RedirectTrailingSlash: true - RedirectFixedPath: false - HandleMethodNotAllowed: false - ForwardedByClientIP: true

func (*Engine) LoadHTMLFiles 

func (engine *Engine) LoadHTMLFiles(files ...string)

func (*Engine) LoadHTMLGlob 

func (engine *Engine) LoadHTMLGlob(pattern string)

func (*Engine) NoMethod 

func (engine *Engine) NoMethod(handlers ...HandlerFunc)

NoMethod sets the handlers called when... TODO

func (*Engine) NoRoute 

func (engine *Engine) NoRoute(handlers ...HandlerFunc)

NoRoute adds handlers for NoRoute. It return a 404 code by default.

func (*Engine) Routes 

func (engine *Engine) Routes() (routes RoutesInfo)

Routes returns a slice of registered routes, including some useful information, such as: the http method, path and the handler name.

func (*Engine) Run 

func (engine *Engine) Run(addr ...string) (err error)

Run attaches the router to a http.Server and starts listening and serving HTTP requests. It is a shortcut for http.ListenAndServe(addr, router) Note: this method will block the calling goroutine indefinitely unless an error happens.

func (*Engine) RunTLS 

func (engine *Engine) RunTLS(addr string, certFile string, keyFile string) (err error)

RunTLS attaches the router to a http.Server and starts listening and serving HTTPS (secure) requests. It is a shortcut for http.ListenAndServeTLS(addr, certFile, keyFile, router) Note: this method will block the calling goroutine indefinitely unless an error happens.

func (*Engine) RunUnix 

func (engine *Engine) RunUnix(file string) (err error)

RunUnix attaches the router to a http.Server and starts listening and serving HTTP requests through the specified unix socket (ie. a file). Note: this method will block the calling goroutine indefinitely unless an error happens.

func (*Engine) ServeHTTP 

func (engine *Engine) ServeHTTP(w http.ResponseWriter, req *http.Request)

Conforms to the http.Handler interface.

func (*Engine) SetHTMLTemplate 

func (engine *Engine) SetHTMLTemplate(templ *template.Template)

func (*Engine) Use 

func (engine *Engine) Use(middleware ...HandlerFunc) IRoutes

Use attachs a global middleware to the router. ie. the middleware attached though Use() will be included in the handlers chain for every single request. Even 404, 405, static files... For example, this is the right place for a logger or error management middleware.

type Error 

type Error struct {
	Err  error
	Type ErrorType
	Meta interface{}
}

func (*Error) Error 

func (msg *Error) Error() string

Implements the error interface

func (*Error) IsType 

func (msg *Error) IsType(flags ErrorType) bool

func (*Error) JSON 

func (msg *Error) JSON() interface{}

func (*Error) MarshalJSON 

func (msg *Error) MarshalJSON() ([]byte, error)

MarshalJSON implements the json.Marshaller interface

func (*Error) SetMeta 

func (msg *Error) SetMeta(data interface{}) *Error

func (*Error) SetType 

func (msg *Error) SetType(flags ErrorType) *Error

type ErrorType 

type ErrorType uint64
const (
	ErrorTypeBind    ErrorType = 1 << 63 // used when c.Bind() fails
	ErrorTypeRender  ErrorType = 1 << 62 // used when c.Render() fails
	ErrorTypePrivate ErrorType = 1 << 0
	ErrorTypePublic  ErrorType = 1 << 1

	ErrorTypeAny ErrorType = 1<<64 - 1
	ErrorTypeNu            = 2
)

type H 

type H map[string]interface{}

func (H) MarshalXML 

func (h H) MarshalXML(e *xml.Encoder, start xml.StartElement) error

MarshalXML allows type H to be used with xml.Marshal

type HandlerFunc 

type HandlerFunc func(*Context)

func BasicAuth 

func BasicAuth(accounts Accounts) HandlerFunc

BasicAuth returns a Basic HTTP Authorization middleware. It takes as argument a map[string]string where the key is the user name and the value is the password.

func BasicAuthForRealm 

func BasicAuthForRealm(accounts Accounts, realm string) HandlerFunc

BasicAuthForRealm returns a Basic HTTP Authorization middleware. It takes as arguments a map[string]string where the key is the user name and the value is the password, as well as the name of the Realm. If the realm is empty, "Authorization Required" will be used by default. (see http://tools.ietf.org/html/rfc2617#section-1.2)

func Bind 

func Bind(val interface{}) HandlerFunc

func ErrorLogger 

func ErrorLogger() HandlerFunc

func ErrorLoggerT 

func ErrorLoggerT(typ ErrorType) HandlerFunc

func Logger 

func Logger() HandlerFunc

Logger instances a Logger middleware that will write the logs to gin.DefaultWriter By default gin.DefaultWriter = os.Stdout

func LoggerWithWriter 

func LoggerWithWriter(out io.Writer, notlogged ...string) HandlerFunc

LoggerWithWriter instance a Logger middleware with the specified writter buffer. Example: os.Stdout, a file opened in write mode, a socket...

func Recovery 

func Recovery() HandlerFunc

Recovery returns a middleware that recovers from any panics and writes a 500 if there was one.

func RecoveryWithWriter 

func RecoveryWithWriter(out io.Writer) HandlerFunc

func WrapF 

func WrapF(f http.HandlerFunc) HandlerFunc

func WrapH 

func WrapH(h http.Handler) HandlerFunc

type HandlersChain 

type HandlersChain []HandlerFunc

func (HandlersChain) Last 

func (c HandlersChain) Last() HandlerFunc

Last returns the last handler in the chain. ie. the last handler is the main own.

type IRouter 

type IRouter interface {
	IRoutes
	Group(string, ...HandlerFunc) *RouterGroup
}

type IRoutes 

type IRoutes interface {
	Use(...HandlerFunc) IRoutes

	Handle(string, string, ...HandlerFunc) IRoutes
	Any(string, ...HandlerFunc) IRoutes
	GET(string, ...HandlerFunc) IRoutes
	POST(string, ...HandlerFunc) IRoutes
	DELETE(string, ...HandlerFunc) IRoutes
	PATCH(string, ...HandlerFunc) IRoutes
	PUT(string, ...HandlerFunc) IRoutes
	OPTIONS(string, ...HandlerFunc) IRoutes
	HEAD(string, ...HandlerFunc) IRoutes

	StaticFile(string, string) IRoutes
	Static(string, string) IRoutes
	StaticFS(string, http.FileSystem) IRoutes
}

type Negotiate 

type Negotiate struct {
	Offered  []string
	HTMLName string
	HTMLData interface{}
	JSONData interface{}
	XMLData  interface{}
	Data     interface{}
}

type Param 

type Param struct {
	Key   string
	Value string
}

Param is a single URL parameter, consisting of a key and a value.

type Params 

type Params []Param

Params is a Param-slice, as returned by the router. The slice is ordered, the first URL parameter is also the first slice value. It is therefore safe to read values by the index.

func (Params) ByName 

func (ps Params) ByName(name string) (va string)

ByName returns the value of the first Param which key matches the given name. If no matching Param is found, an empty string is returned.

func (Params) Get 

func (ps Params) Get(name string) (string, bool)

Get returns the value of the first Param which key matches the given name. If no matching Param is found, an empty string is returned.

type ResponseWriter 

type ResponseWriter interface {
	http.ResponseWriter
	http.Hijacker
	http.Flusher
	http.CloseNotifier

	// Returns the HTTP response status code of the current request.
	Status() int

	// Returns the number of bytes already written into the response http body.
	// See Written()
	Size() int

	// Writes the string into the response body.
	WriteString(string) (int, error)

	// Returns true if the response body was already written.
	Written() bool

	// Forces to write the http header (status code + headers).
	WriteHeaderNow()
}

type RouteInfo 

type RouteInfo struct {
	Method  string
	Path    string
	Handler string
}

type RouterGroup 

type RouterGroup struct {
	Handlers HandlersChain
	// contains filtered or unexported fields
}

RouterGroup is used internally to configure router, a RouterGroup is associated with a prefix and an array of handlers (middleware)

func (*RouterGroup) Any 

func (group *RouterGroup) Any(relativePath string, handlers ...HandlerFunc) IRoutes

Any registers a route that matches all the HTTP methods. GET, POST, PUT, PATCH, HEAD, OPTIONS, DELETE, CONNECT, TRACE

func (*RouterGroup) BasePath 

func (group *RouterGroup) BasePath() string

func (*RouterGroup) DELETE 

func (group *RouterGroup) DELETE(relativePath string, handlers ...HandlerFunc) IRoutes

DELETE is a shortcut for router.Handle("DELETE", path, handle)

func (*RouterGroup) GET 

func (group *RouterGroup) GET(relativePath string, handlers ...HandlerFunc) IRoutes

GET is a shortcut for router.Handle("GET", path, handle)

func (*RouterGroup) Group 

func (group *RouterGroup) Group(relativePath string, handlers ...HandlerFunc) *RouterGroup

Group creates a new router group. You should add all the routes that have common middlwares or the same path prefix. For example, all the routes that use a common middlware for authorization could be grouped.

func (*RouterGroup) HEAD 

func (group *RouterGroup) HEAD(relativePath string, handlers ...HandlerFunc) IRoutes

HEAD is a shortcut for router.Handle("HEAD", path, handle)

func (*RouterGroup) Handle 

func (group *RouterGroup) Handle(httpMethod, relativePath string, handlers ...HandlerFunc) IRoutes

Handle registers a new request handle and middleware with the given path and method. The last handler should be the real handler, the other ones should be middleware that can and should be shared among different routes. See the example code in github.

For GET, POST, PUT, PATCH and DELETE requests the respective shortcut functions can be used.

This function is intended for bulk loading and to allow the usage of less frequently used, non-standardized or custom methods (e.g. for internal communication with a proxy).

func (*RouterGroup) OPTIONS 

func (group *RouterGroup) OPTIONS(relativePath string, handlers ...HandlerFunc) IRoutes

OPTIONS is a shortcut for router.Handle("OPTIONS", path, handle)

func (*RouterGroup) PATCH 

func (group *RouterGroup) PATCH(relativePath string, handlers ...HandlerFunc) IRoutes

PATCH is a shortcut for router.Handle("PATCH", path, handle)

func (*RouterGroup) POST 

func (group *RouterGroup) POST(relativePath string, handlers ...HandlerFunc) IRoutes

POST is a shortcut for router.Handle("POST", path, handle)

func (*RouterGroup) PUT 

func (group *RouterGroup) PUT(relativePath string, handlers ...HandlerFunc) IRoutes

PUT is a shortcut for router.Handle("PUT", path, handle)

func (*RouterGroup) Static 

func (group *RouterGroup) Static(relativePath, root string) IRoutes

Static serves files from the given file system root. Internally a http.FileServer is used, therefore http.NotFound is used instead of the Router's NotFound handler. To use the operating system's file system implementation, use : 

router.Static("/static", "/var/www")

func (*RouterGroup) StaticFS 

func (group *RouterGroup) StaticFS(relativePath string, fs http.FileSystem) IRoutes

StaticFS works just like `Static()` but a custom `http.FileSystem` can be used instead. Gin by default user: gin.Dir()

func (*RouterGroup) StaticFile 

func (group *RouterGroup) StaticFile(relativePath, filepath string) IRoutes

StaticFile registers a single route in order to server a single file of the local filesystem. router.StaticFile("favicon.ico", "./resources/favicon.ico")

func (*RouterGroup) Use 

func (group *RouterGroup) Use(middleware ...HandlerFunc) IRoutes

Use adds middleware to the group, see example code in github.

type RoutesInfo 

type RoutesInfo []RouteInfo

Source Files

View all Source files

Directories

Path Synopsis
example
Package example is a generated protocol buffer package.
 Package example is a generated protocol buffer package.
examples
app-engine
basic
realtime-advanced
realtime-chat

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