forked from mirror/gin
Adds comments
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parent
4cc2de6207
commit
a20984c2bc
55
context.go
55
context.go
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@ -72,6 +72,8 @@ func (c *Context) Copy() *Context {
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return &cp
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}
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// Returns the main handle's name. For example if the handler is "handleGetUsers()", this
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// function will return "main.handleGetUsers"
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func (c *Context) HandlerName() string {
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return nameOfFunction(c.handlers.Last())
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}
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@ -125,7 +127,8 @@ func (c *Context) AbortWithError(code int, err error) *Error {
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// Attaches an error to the current context. The error is pushed to a list of errors.
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// It's a good idea to call Error for each error that occurred during the resolution of a request.
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// 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.
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// A middleware can be used to collect all the errors
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// and push them to a database together, print a log, or append it in the HTTP response.
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func (c *Context) Error(err error) *Error {
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var parsedError *Error
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switch err.(type) {
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@ -145,8 +148,8 @@ func (c *Context) Error(err error) *Error {
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/******** METADATA MANAGEMENT********/
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/************************************/
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// Sets a new pair key/value just for this context.
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// It also lazy initializes the hashmap if it was not used previously.
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// Set is used to store a new key/value pair exclusivelly for this context.
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// It also lazy initializes c.Keys if it was not used previously.
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func (c *Context) Set(key string, value interface{}) {
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if c.Keys == nil {
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c.Keys = make(map[string]interface{})
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@ -154,7 +157,7 @@ func (c *Context) Set(key string, value interface{}) {
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c.Keys[key] = value
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}
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// Returns the value for the given key, ie: (value, true).
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// Get returns the value for the given key, ie: (value, true).
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// If the value does not exists it returns (nil, false)
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func (c *Context) Get(key string) (value interface{}, exists bool) {
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if c.Keys != nil {
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@ -175,19 +178,19 @@ func (c *Context) MustGet(key string) interface{} {
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/************ INPUT DATA ************/
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/************************************/
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// Shortcut for c.Request.URL.Query().Get(key)
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// Query is a shortcut for c.Request.URL.Query().Get(key)
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func (c *Context) Query(key string) (va string) {
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va, _ = c.query(key)
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return
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}
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// Shortcut for c.Request.PostFormValue(key)
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// PostForm is a shortcut for c.Request.PostFormValue(key)
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func (c *Context) PostForm(key string) (va string) {
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va, _ = c.postForm(key)
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return
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}
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// Shortcut for c.Params.ByName(key)
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// Param is a shortcut for c.Params.ByName(key)
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func (c *Context) Param(key string) string {
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return c.Params.ByName(key)
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}
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@ -199,6 +202,13 @@ func (c *Context) DefaultPostForm(key, defaultValue string) string {
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return defaultValue
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}
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// DefaultQuery returns the keyed url query value if it exists, othewise it returns the
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// specified defaultValue.
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// ```
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// /?name=Manu
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// c.DefaultQuery("name", "unknown") == "Manu"
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// c.DefaultQuery("id", "none") == "none"
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// ```
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func (c *Context) DefaultQuery(key, defaultValue string) string {
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if va, ok := c.query(key); ok {
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return va
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@ -228,22 +238,26 @@ func (c *Context) postForm(key string) (string, bool) {
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return "", false
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}
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// This function checks the Content-Type to select a binding engine automatically,
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// Bind checks the Content-Type to select a binding engine automatically,
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// Depending the "Content-Type" header different bindings are used:
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// "application/json" --> JSON binding
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// "application/xml" --> XML binding
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// else --> returns an error
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// if 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.
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// otherwise --> returns an error
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// If Parses the request's body as JSON if Content-Type == "application/json" using JSON or XML as a JSON input.
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// It decodes the json payload into the struct specified as a pointer.
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// Like ParseBody() but this method also writes a 400 error if the json is not valid.
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func (c *Context) Bind(obj interface{}) error {
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b := binding.Default(c.Request.Method, c.ContentType())
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return c.BindWith(obj, b)
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}
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// Shortcut for c.BindWith(obj, binding.JSON)
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// BindJSON is a shortcut for c.BindWith(obj, binding.JSON)
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func (c *Context) BindJSON(obj interface{}) error {
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return c.BindWith(obj, binding.JSON)
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}
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// BindWith binds the passed struct pointer using the specified binding engine.
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// See the binding package.
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func (c *Context) BindWith(obj interface{}, b binding.Binding) error {
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if err := b.Bind(c.Request, obj); err != nil {
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c.AbortWithError(400, err).SetType(ErrorTypeBind)
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@ -252,7 +266,7 @@ func (c *Context) BindWith(obj interface{}, b binding.Binding) error {
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return nil
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}
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// Best effort algoritm to return the real client IP, it parses
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// ClientIP implements a best effort algorithm to return the real client IP, it parses
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// X-Real-IP and X-Forwarded-For in order to work properly with reverse-proxies such us: nginx or haproxy.
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func (c *Context) ClientIP() string {
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if c.engine.ForwardedByClientIP {
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@ -272,6 +286,7 @@ func (c *Context) ClientIP() string {
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return strings.TrimSpace(c.Request.RemoteAddr)
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}
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// ContentType returns the Content-Type header of the request.
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func (c *Context) ContentType() string {
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return filterFlags(c.requestHeader("Content-Type"))
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}
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@ -287,8 +302,8 @@ func (c *Context) requestHeader(key string) string {
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/******** RESPONSE RENDERING ********/
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/************************************/
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// Intelligent shortcut for c.Writer.Header().Set(key, value)
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// it writes a header in the response.
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// Header is a intelligent shortcut for c.Writer.Header().Set(key, value)
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// It writes a header in the response.
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// If value == "", this method removes the header `c.Writer.Header().Del(key)`
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func (c *Context) Header(key, value string) {
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if len(value) == 0 {
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@ -310,7 +325,7 @@ func (c *Context) renderError(err error) {
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c.AbortWithError(500, err).SetType(ErrorTypeRender)
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}
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// Renders the HTTP template specified by its file name.
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// HTML renders the HTTP template specified by its file name.
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// It also updates the HTTP code and sets the Content-Type as "text/html".
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// See http://golang.org/doc/articles/wiki/
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func (c *Context) HTML(code int, name string, obj interface{}) {
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@ -318,7 +333,7 @@ func (c *Context) HTML(code int, name string, obj interface{}) {
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c.Render(code, instance)
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}
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// Serializes the given struct as pretty JSON (indented + endlines) into the response body.
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// IndentedJSON serializes the given struct as pretty JSON (indented + endlines) into the response body.
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// It also sets the Content-Type as "application/json".
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// WARNING: we recommend to use this only for development propuses since printing pretty JSON is
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// more CPU and bandwidth consuming. Use Context.JSON() instead.
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@ -326,7 +341,7 @@ func (c *Context) IndentedJSON(code int, obj interface{}) {
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c.Render(code, render.IndentedJSON{Data: obj})
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}
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// Serializes the given struct as JSON into the response body.
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// JSON serializes the given struct as JSON into the response body.
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// It also sets the Content-Type as "application/json".
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func (c *Context) JSON(code int, obj interface{}) {
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c.writermem.WriteHeader(code)
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@ -335,19 +350,19 @@ func (c *Context) JSON(code int, obj interface{}) {
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}
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}
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// Serializes the given struct as XML into the response body.
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// XML serializes the given struct as XML into the response body.
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// It also sets the Content-Type as "application/xml".
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func (c *Context) XML(code int, obj interface{}) {
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c.Render(code, render.XML{Data: obj})
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}
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// Writes the given string into the response body.
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// String writes the given string into the response body.
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func (c *Context) String(code int, format string, values ...interface{}) {
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c.writermem.WriteHeader(code)
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render.WriteString(c.Writer, format, values)
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}
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// Returns a HTTP redirect to the specific location.
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// Redirect returns a HTTP redirect to the specific location.
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func (c *Context) Redirect(code int, location string) {
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c.Render(-1, render.Redirect{
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Code: code,
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@ -102,10 +102,10 @@ func (a errorMsgs) ByType(typ ErrorType) errorMsgs {
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// Shortcut for errors[len(errors)-1]
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func (a errorMsgs) Last() *Error {
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length := len(a)
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if length == 0 {
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return nil
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}
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if length > 0 {
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return a[length-1]
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}
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return nil
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}
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// Returns an array will all the error messages.
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4
gin.go
4
gin.go
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@ -209,8 +209,8 @@ func iterate(path, method string, routes RoutesInfo, root *node) RoutesInfo {
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Handler: nameOfFunction(root.handlers.Last()),
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})
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}
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for _, node := range root.children {
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routes = iterate(path, method, routes, node)
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for _, child := range root.children {
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routes = iterate(path, method, routes, child)
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}
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return routes
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}
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