mirror of
https://github.com/labstack/echo.git
synced 2024-12-22 20:06:21 +02:00
787 lines
25 KiB
Go
787 lines
25 KiB
Go
package echo
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import (
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"bytes"
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"encoding/xml"
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"errors"
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"fmt"
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"io"
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"io/fs"
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"mime/multipart"
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"net"
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"net/http"
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"net/url"
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"path/filepath"
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"strings"
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"sync"
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)
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// Context represents the context of the current HTTP request. It holds request and
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// response objects, path, path parameters, data and registered handler.
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type Context interface {
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// Request returns `*http.Request`.
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Request() *http.Request
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// SetRequest sets `*http.Request`.
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SetRequest(r *http.Request)
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// SetResponse sets `*Response`.
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SetResponse(r *Response)
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// Response returns `*Response`.
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Response() *Response
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// IsTLS returns true if HTTP connection is TLS otherwise false.
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IsTLS() bool
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// IsWebSocket returns true if HTTP connection is WebSocket otherwise false.
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IsWebSocket() bool
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// Scheme returns the HTTP protocol scheme, `http` or `https`.
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Scheme() string
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// RealIP returns the client's network address based on `X-Forwarded-For`
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// or `X-Real-IP` request header.
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// The behavior can be configured using `Echo#IPExtractor`.
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RealIP() string
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// RouteInfo returns current request route information. Method, Path, Name and params if they exist for matched route.
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// In case of 404 (route not found) and 405 (method not allowed) RouteInfo returns generic struct for these cases.
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RouteInfo() RouteInfo
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// Path returns the registered path for the handler.
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Path() string
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// PathParam returns path parameter by name.
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PathParam(name string) string
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// PathParamDefault returns the path parameter or default value for the provided name.
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//
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// Notes for DefaultRouter implementation:
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// Path parameter could be empty for cases like that:
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// * route `/release-:version/bin` and request URL is `/release-/bin`
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// * route `/api/:version/image.jpg` and request URL is `/api//image.jpg`
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// but not when path parameter is last part of route path
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// * route `/download/file.:ext` will not match request `/download/file.`
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PathParamDefault(name string, defaultValue string) string
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// PathParams returns path parameter values.
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PathParams() PathParams
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// SetPathParams sets path parameters for current request.
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SetPathParams(params PathParams)
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// QueryParam returns the query param for the provided name.
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QueryParam(name string) string
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// QueryParamDefault returns the query param or default value for the provided name.
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QueryParamDefault(name, defaultValue string) string
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// QueryParams returns the query parameters as `url.Values`.
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QueryParams() url.Values
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// QueryString returns the URL query string.
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QueryString() string
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// FormValue returns the form field value for the provided name.
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FormValue(name string) string
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// FormValueDefault returns the form field value or default value for the provided name.
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FormValueDefault(name, defaultValue string) string
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// FormValues returns the form field values as `url.Values`.
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FormValues() (url.Values, error)
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// FormFile returns the multipart form file for the provided name.
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FormFile(name string) (*multipart.FileHeader, error)
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// MultipartForm returns the multipart form.
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MultipartForm() (*multipart.Form, error)
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// Cookie returns the named cookie provided in the request.
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Cookie(name string) (*http.Cookie, error)
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// SetCookie adds a `Set-Cookie` header in HTTP response.
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SetCookie(cookie *http.Cookie)
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// Cookies returns the HTTP cookies sent with the request.
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Cookies() []*http.Cookie
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// Get retrieves data from the context.
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Get(key string) interface{}
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// Set saves data in the context.
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Set(key string, val interface{})
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// Bind binds path params, query params and the request body into provided type `i`. The default binder
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// binds body based on Content-Type header.
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Bind(i interface{}) error
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// Validate validates provided `i`. It is usually called after `Context#Bind()`.
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// Validator must be registered using `Echo#Validator`.
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Validate(i interface{}) error
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// Render renders a template with data and sends a text/html response with status
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// code. Renderer must be registered using `Echo.Renderer`.
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Render(code int, name string, data interface{}) error
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// HTML sends an HTTP response with status code.
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HTML(code int, html string) error
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// HTMLBlob sends an HTTP blob response with status code.
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HTMLBlob(code int, b []byte) error
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// String sends a string response with status code.
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String(code int, s string) error
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// JSON sends a JSON response with status code.
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JSON(code int, i interface{}) error
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// JSONPretty sends a pretty-print JSON with status code.
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JSONPretty(code int, i interface{}, indent string) error
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// JSONBlob sends a JSON blob response with status code.
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JSONBlob(code int, b []byte) error
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// JSONP sends a JSONP response with status code. It uses `callback` to construct
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// the JSONP payload.
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JSONP(code int, callback string, i interface{}) error
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// JSONPBlob sends a JSONP blob response with status code. It uses `callback`
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// to construct the JSONP payload.
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JSONPBlob(code int, callback string, b []byte) error
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// XML sends an XML response with status code.
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XML(code int, i interface{}) error
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// XMLPretty sends a pretty-print XML with status code.
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XMLPretty(code int, i interface{}, indent string) error
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// XMLBlob sends an XML blob response with status code.
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XMLBlob(code int, b []byte) error
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// Blob sends a blob response with status code and content type.
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Blob(code int, contentType string, b []byte) error
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// Stream sends a streaming response with status code and content type.
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Stream(code int, contentType string, r io.Reader) error
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// File sends a response with the content of the file.
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File(file string) error
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// FileFS sends a response with the content of the file from given filesystem.
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FileFS(file string, filesystem fs.FS) error
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// Attachment sends a response as attachment, prompting client to save the
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// file.
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Attachment(file string, name string) error
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// Inline sends a response as inline, opening the file in the browser.
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Inline(file string, name string) error
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// NoContent sends a response with no body and a status code.
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NoContent(code int) error
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// Redirect redirects the request to a provided URL with status code.
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Redirect(code int, url string) error
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// Error invokes the registered global HTTP error handler. Generally used by middleware.
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// A side-effect of calling global error handler is that now Response has been committed (sent to the client) and
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// middlewares up in chain can not change Response status code or Response body anymore.
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//
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// Avoid using this method in handlers as no middleware will be able to effectively handle errors after that.
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// Instead of calling this method in handler return your error and let it be handled by middlewares or global error handler.
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Error(err error)
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// Echo returns the `Echo` instance.
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//
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// WARNING: Remember that Echo public fields and methods are coroutine safe ONLY when you are NOT mutating them
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// anywhere in your code after Echo server has started.
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Echo() *Echo
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}
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// ServableContext is interface that Echo context implementation must implement to be usable in middleware/handlers and
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// be able to be routed by Router.
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type ServableContext interface {
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Context // minimal set of methods for middlewares and handler
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RoutableContext // minimal set for routing. These methods should not be accessed in middlewares/handlers
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// Reset resets the context after request completes. It must be called along
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// with `Echo#AcquireContext()` and `Echo#ReleaseContext()`.
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// See `Echo#ServeHTTP()`
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Reset(r *http.Request, w http.ResponseWriter)
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}
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const (
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// ContextKeyHeaderAllow is set by Router for getting value for `Allow` header in later stages of handler call chain.
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// Allow header is mandatory for status 405 (method not found) and useful for OPTIONS method requests.
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// It is added to context only when Router does not find matching method handler for request.
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ContextKeyHeaderAllow = "echo_header_allow"
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)
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const (
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defaultMemory = 32 << 20 // 32 MB
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indexPage = "index.html"
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defaultIndent = " "
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)
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// DefaultContext is default implementation of Context interface and can be embedded into structs to compose
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// new Contexts with extended/modified behaviour.
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type DefaultContext struct {
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request *http.Request
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response *Response
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route RouteInfo
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path string
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// pathParams holds path/uri parameters determined by Router. Lifecycle is handled by Echo to reduce allocations.
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pathParams *PathParams
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// currentParams hold path parameters set by non-Echo implementation (custom middlewares, handlers) during the lifetime of Request.
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// Lifecycle is not handle by Echo and could have excess allocations per served Request
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currentParams PathParams
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query url.Values
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store Map
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echo *Echo
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lock sync.RWMutex
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}
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// NewDefaultContext creates new instance of DefaultContext.
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// Argument pathParamAllocSize must be value that is stored in Echo.contextPathParamAllocSize field and is used
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// to preallocate PathParams slice.
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func NewDefaultContext(e *Echo, pathParamAllocSize int) *DefaultContext {
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p := make(PathParams, pathParamAllocSize)
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return &DefaultContext{
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pathParams: &p,
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store: make(Map),
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echo: e,
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}
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}
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// Reset resets the context after request completes. It must be called along
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// with `Echo#AcquireContext()` and `Echo#ReleaseContext()`.
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// See `Echo#ServeHTTP()`
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func (c *DefaultContext) Reset(r *http.Request, w http.ResponseWriter) {
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c.request = r
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c.response.reset(w)
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c.query = nil
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c.store = nil
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c.route = nil
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c.path = ""
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// NOTE: Don't reset because it has to have length of c.echo.contextPathParamAllocSize at all times
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*c.pathParams = (*c.pathParams)[:0]
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c.currentParams = nil
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}
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func (c *DefaultContext) writeContentType(value string) {
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header := c.Response().Header()
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if header.Get(HeaderContentType) == "" {
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header.Set(HeaderContentType, value)
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}
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}
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// Request returns `*http.Request`.
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func (c *DefaultContext) Request() *http.Request {
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return c.request
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}
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// SetRequest sets `*http.Request`.
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func (c *DefaultContext) SetRequest(r *http.Request) {
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c.request = r
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}
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// Response returns `*Response`.
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func (c *DefaultContext) Response() *Response {
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return c.response
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}
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// SetResponse sets `*Response`.
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func (c *DefaultContext) SetResponse(r *Response) {
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c.response = r
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}
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// IsTLS returns true if HTTP connection is TLS otherwise false.
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func (c *DefaultContext) IsTLS() bool {
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return c.request.TLS != nil
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}
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// IsWebSocket returns true if HTTP connection is WebSocket otherwise false.
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func (c *DefaultContext) IsWebSocket() bool {
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upgrade := c.request.Header.Get(HeaderUpgrade)
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return strings.EqualFold(upgrade, "websocket")
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}
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// Scheme returns the HTTP protocol scheme, `http` or `https`.
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func (c *DefaultContext) Scheme() string {
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// Can't use `r.Request.URL.Scheme`
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// See: https://groups.google.com/forum/#!topic/golang-nuts/pMUkBlQBDF0
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if c.IsTLS() {
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return "https"
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}
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if scheme := c.request.Header.Get(HeaderXForwardedProto); scheme != "" {
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return scheme
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}
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if scheme := c.request.Header.Get(HeaderXForwardedProtocol); scheme != "" {
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return scheme
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}
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if ssl := c.request.Header.Get(HeaderXForwardedSsl); ssl == "on" {
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return "https"
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}
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if scheme := c.request.Header.Get(HeaderXUrlScheme); scheme != "" {
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return scheme
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}
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return "http"
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}
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// RealIP returns the client's network address based on `X-Forwarded-For`
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// or `X-Real-IP` request header.
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// The behavior can be configured using `Echo#IPExtractor`.
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func (c *DefaultContext) RealIP() string {
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if c.echo != nil && c.echo.IPExtractor != nil {
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return c.echo.IPExtractor(c.request)
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}
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// Fall back to legacy behavior
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if ip := c.request.Header.Get(HeaderXForwardedFor); ip != "" {
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i := strings.IndexAny(ip, ",")
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if i > 0 {
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xffip := strings.TrimSpace(ip[:i])
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xffip = strings.TrimPrefix(xffip, "[")
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xffip = strings.TrimSuffix(xffip, "]")
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return xffip
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}
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return ip
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}
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if ip := c.request.Header.Get(HeaderXRealIP); ip != "" {
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ip = strings.TrimPrefix(ip, "[")
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ip = strings.TrimSuffix(ip, "]")
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return ip
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}
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ra, _, _ := net.SplitHostPort(c.request.RemoteAddr)
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return ra
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}
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// Path returns the registered path for the handler.
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func (c *DefaultContext) Path() string {
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return c.path
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}
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// SetPath sets the registered path for the handler.
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func (c *DefaultContext) SetPath(p string) {
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c.path = p
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}
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// RouteInfo returns current request route information. Method, Path, Name and params if they exist for matched route.
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// In case of 404 (route not found) and 405 (method not allowed) RouteInfo returns generic struct for these cases.
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func (c *DefaultContext) RouteInfo() RouteInfo {
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return c.route
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}
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// SetRouteInfo sets the route info of this request to the context.
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func (c *DefaultContext) SetRouteInfo(ri RouteInfo) {
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c.route = ri
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}
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// RawPathParams returns raw path pathParams value. Allocation of PathParams is handled by Context.
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func (c *DefaultContext) RawPathParams() *PathParams {
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return c.pathParams
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}
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// SetRawPathParams replaces any existing param values with new values for this context lifetime (request).
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//
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// DO NOT USE!
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// Do not set any other value than what you got from RawPathParams as allocation of PathParams is handled by Context.
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// If you mess up size of pathParams size your application will panic/crash during routing
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func (c *DefaultContext) SetRawPathParams(params *PathParams) {
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c.pathParams = params
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}
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// PathParam returns path parameter by name.
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func (c *DefaultContext) PathParam(name string) string {
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if c.currentParams != nil {
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return c.currentParams.Get(name, "")
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}
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return c.pathParams.Get(name, "")
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}
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// PathParamDefault returns the path parameter or default value for the provided name.
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func (c *DefaultContext) PathParamDefault(name, defaultValue string) string {
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return c.pathParams.Get(name, defaultValue)
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}
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// PathParams returns path parameter values.
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func (c *DefaultContext) PathParams() PathParams {
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if c.currentParams != nil {
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return c.currentParams
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}
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result := make(PathParams, len(*c.pathParams))
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copy(result, *c.pathParams)
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return result
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}
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// SetPathParams sets path parameters for current request.
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func (c *DefaultContext) SetPathParams(params PathParams) {
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c.currentParams = params
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}
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// QueryParam returns the query param for the provided name.
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func (c *DefaultContext) QueryParam(name string) string {
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if c.query == nil {
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c.query = c.request.URL.Query()
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}
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return c.query.Get(name)
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}
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// QueryParamDefault returns the query param or default value for the provided name.
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// Note: QueryParamDefault does not distinguish if query had no value by that name or value was empty string
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// This means URLs `/test?search=` and `/test` would both return `1` for `c.QueryParamDefault("search", "1")`
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func (c *DefaultContext) QueryParamDefault(name, defaultValue string) string {
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value := c.QueryParam(name)
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if value == "" {
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value = defaultValue
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}
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return value
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}
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// QueryParams returns the query parameters as `url.Values`.
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func (c *DefaultContext) QueryParams() url.Values {
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if c.query == nil {
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c.query = c.request.URL.Query()
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}
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return c.query
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}
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// QueryString returns the URL query string.
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func (c *DefaultContext) QueryString() string {
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return c.request.URL.RawQuery
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}
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// FormValue returns the form field value for the provided name.
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func (c *DefaultContext) FormValue(name string) string {
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return c.request.FormValue(name)
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}
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// FormValueDefault returns the form field value or default value for the provided name.
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// Note: FormValueDefault does not distinguish if form had no value by that name or value was empty string
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func (c *DefaultContext) FormValueDefault(name, defaultValue string) string {
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value := c.FormValue(name)
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if value == "" {
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value = defaultValue
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}
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return value
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}
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// FormValues returns the form field values as `url.Values`.
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func (c *DefaultContext) FormValues() (url.Values, error) {
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if strings.HasPrefix(c.request.Header.Get(HeaderContentType), MIMEMultipartForm) {
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if err := c.request.ParseMultipartForm(defaultMemory); err != nil {
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return nil, err
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}
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} else {
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if err := c.request.ParseForm(); err != nil {
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return nil, err
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}
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}
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return c.request.Form, nil
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}
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// FormFile returns the multipart form file for the provided name.
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func (c *DefaultContext) FormFile(name string) (*multipart.FileHeader, error) {
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f, fh, err := c.request.FormFile(name)
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if err != nil {
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return nil, err
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}
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f.Close()
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return fh, nil
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}
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// MultipartForm returns the multipart form.
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func (c *DefaultContext) MultipartForm() (*multipart.Form, error) {
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err := c.request.ParseMultipartForm(defaultMemory)
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return c.request.MultipartForm, err
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}
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// Cookie returns the named cookie provided in the request.
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func (c *DefaultContext) Cookie(name string) (*http.Cookie, error) {
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return c.request.Cookie(name)
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}
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// SetCookie adds a `Set-Cookie` header in HTTP response.
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func (c *DefaultContext) SetCookie(cookie *http.Cookie) {
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http.SetCookie(c.Response(), cookie)
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}
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// Cookies returns the HTTP cookies sent with the request.
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func (c *DefaultContext) Cookies() []*http.Cookie {
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return c.request.Cookies()
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}
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// Get retrieves data from the context.
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func (c *DefaultContext) Get(key string) interface{} {
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c.lock.RLock()
|
|
defer c.lock.RUnlock()
|
|
return c.store[key]
|
|
}
|
|
|
|
// Set saves data in the context.
|
|
func (c *DefaultContext) Set(key string, val interface{}) {
|
|
c.lock.Lock()
|
|
defer c.lock.Unlock()
|
|
|
|
if c.store == nil {
|
|
c.store = make(Map)
|
|
}
|
|
c.store[key] = val
|
|
}
|
|
|
|
// Bind binds path params, query params and the request body into provided type `i`. The default binder
|
|
// binds body based on Content-Type header.
|
|
func (c *DefaultContext) Bind(i interface{}) error {
|
|
return c.echo.Binder.Bind(c, i)
|
|
}
|
|
|
|
// Validate validates provided `i`. It is usually called after `Context#Bind()`.
|
|
// Validator must be registered using `Echo#Validator`.
|
|
func (c *DefaultContext) Validate(i interface{}) error {
|
|
if c.echo.Validator == nil {
|
|
return ErrValidatorNotRegistered
|
|
}
|
|
return c.echo.Validator.Validate(i)
|
|
}
|
|
|
|
// Render renders a template with data and sends a text/html response with status
|
|
// code. Renderer must be registered using `Echo.Renderer`.
|
|
func (c *DefaultContext) Render(code int, name string, data interface{}) (err error) {
|
|
if c.echo.Renderer == nil {
|
|
return ErrRendererNotRegistered
|
|
}
|
|
buf := new(bytes.Buffer)
|
|
if err = c.echo.Renderer.Render(buf, name, data, c); err != nil {
|
|
return
|
|
}
|
|
return c.HTMLBlob(code, buf.Bytes())
|
|
}
|
|
|
|
// HTML sends an HTTP response with status code.
|
|
func (c *DefaultContext) HTML(code int, html string) (err error) {
|
|
return c.HTMLBlob(code, []byte(html))
|
|
}
|
|
|
|
// HTMLBlob sends an HTTP blob response with status code.
|
|
func (c *DefaultContext) HTMLBlob(code int, b []byte) (err error) {
|
|
return c.Blob(code, MIMETextHTMLCharsetUTF8, b)
|
|
}
|
|
|
|
// String sends a string response with status code.
|
|
func (c *DefaultContext) String(code int, s string) (err error) {
|
|
return c.Blob(code, MIMETextPlainCharsetUTF8, []byte(s))
|
|
}
|
|
|
|
func (c *DefaultContext) jsonPBlob(code int, callback string, i interface{}) (err error) {
|
|
indent := ""
|
|
if _, pretty := c.QueryParams()["pretty"]; c.echo.Debug || pretty {
|
|
indent = defaultIndent
|
|
}
|
|
c.writeContentType(MIMEApplicationJavaScriptCharsetUTF8)
|
|
c.response.WriteHeader(code)
|
|
if _, err = c.response.Write([]byte(callback + "(")); err != nil {
|
|
return
|
|
}
|
|
if err = c.echo.JSONSerializer.Serialize(c, i, indent); err != nil {
|
|
return
|
|
}
|
|
if _, err = c.response.Write([]byte(");")); err != nil {
|
|
return
|
|
}
|
|
return
|
|
}
|
|
|
|
func (c *DefaultContext) json(code int, i interface{}, indent string) error {
|
|
c.writeContentType(MIMEApplicationJSONCharsetUTF8)
|
|
c.response.Status = code
|
|
return c.echo.JSONSerializer.Serialize(c, i, indent)
|
|
}
|
|
|
|
// JSON sends a JSON response with status code.
|
|
func (c *DefaultContext) JSON(code int, i interface{}) (err error) {
|
|
indent := ""
|
|
if _, pretty := c.QueryParams()["pretty"]; c.echo.Debug || pretty {
|
|
indent = defaultIndent
|
|
}
|
|
return c.json(code, i, indent)
|
|
}
|
|
|
|
// JSONPretty sends a pretty-print JSON with status code.
|
|
func (c *DefaultContext) JSONPretty(code int, i interface{}, indent string) (err error) {
|
|
return c.json(code, i, indent)
|
|
}
|
|
|
|
// JSONBlob sends a JSON blob response with status code.
|
|
func (c *DefaultContext) JSONBlob(code int, b []byte) (err error) {
|
|
return c.Blob(code, MIMEApplicationJSONCharsetUTF8, b)
|
|
}
|
|
|
|
// JSONP sends a JSONP response with status code. It uses `callback` to construct
|
|
// the JSONP payload.
|
|
func (c *DefaultContext) JSONP(code int, callback string, i interface{}) (err error) {
|
|
return c.jsonPBlob(code, callback, i)
|
|
}
|
|
|
|
// JSONPBlob sends a JSONP blob response with status code. It uses `callback`
|
|
// to construct the JSONP payload.
|
|
func (c *DefaultContext) JSONPBlob(code int, callback string, b []byte) (err error) {
|
|
c.writeContentType(MIMEApplicationJavaScriptCharsetUTF8)
|
|
c.response.WriteHeader(code)
|
|
if _, err = c.response.Write([]byte(callback + "(")); err != nil {
|
|
return
|
|
}
|
|
if _, err = c.response.Write(b); err != nil {
|
|
return
|
|
}
|
|
_, err = c.response.Write([]byte(");"))
|
|
return
|
|
}
|
|
|
|
func (c *DefaultContext) xml(code int, i interface{}, indent string) (err error) {
|
|
c.writeContentType(MIMEApplicationXMLCharsetUTF8)
|
|
c.response.WriteHeader(code)
|
|
enc := xml.NewEncoder(c.response)
|
|
if indent != "" {
|
|
enc.Indent("", indent)
|
|
}
|
|
if _, err = c.response.Write([]byte(xml.Header)); err != nil {
|
|
return
|
|
}
|
|
return enc.Encode(i)
|
|
}
|
|
|
|
// XML sends an XML response with status code.
|
|
func (c *DefaultContext) XML(code int, i interface{}) (err error) {
|
|
indent := ""
|
|
if _, pretty := c.QueryParams()["pretty"]; c.echo.Debug || pretty {
|
|
indent = defaultIndent
|
|
}
|
|
return c.xml(code, i, indent)
|
|
}
|
|
|
|
// XMLPretty sends a pretty-print XML with status code.
|
|
func (c *DefaultContext) XMLPretty(code int, i interface{}, indent string) (err error) {
|
|
return c.xml(code, i, indent)
|
|
}
|
|
|
|
// XMLBlob sends an XML blob response with status code.
|
|
func (c *DefaultContext) XMLBlob(code int, b []byte) (err error) {
|
|
c.writeContentType(MIMEApplicationXMLCharsetUTF8)
|
|
c.response.WriteHeader(code)
|
|
if _, err = c.response.Write([]byte(xml.Header)); err != nil {
|
|
return
|
|
}
|
|
_, err = c.response.Write(b)
|
|
return
|
|
}
|
|
|
|
// Blob sends a blob response with status code and content type.
|
|
func (c *DefaultContext) Blob(code int, contentType string, b []byte) (err error) {
|
|
c.writeContentType(contentType)
|
|
c.response.WriteHeader(code)
|
|
_, err = c.response.Write(b)
|
|
return
|
|
}
|
|
|
|
// Stream sends a streaming response with status code and content type.
|
|
func (c *DefaultContext) Stream(code int, contentType string, r io.Reader) (err error) {
|
|
c.writeContentType(contentType)
|
|
c.response.WriteHeader(code)
|
|
_, err = io.Copy(c.response, r)
|
|
return
|
|
}
|
|
|
|
// File sends a response with the content of the file.
|
|
func (c *DefaultContext) File(file string) error {
|
|
return fsFile(c, file, c.echo.Filesystem)
|
|
}
|
|
|
|
// FileFS serves file from given file system.
|
|
//
|
|
// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
|
|
// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
|
|
// including `assets/images` as their prefix.
|
|
func (c *DefaultContext) FileFS(file string, filesystem fs.FS) error {
|
|
return fsFile(c, file, filesystem)
|
|
}
|
|
|
|
func fsFile(c Context, file string, filesystem fs.FS) error {
|
|
f, err := filesystem.Open(file)
|
|
if err != nil {
|
|
return ErrNotFound
|
|
}
|
|
defer f.Close()
|
|
|
|
fi, _ := f.Stat()
|
|
if fi.IsDir() {
|
|
file = filepath.ToSlash(filepath.Join(file, indexPage)) // ToSlash is necessary for Windows. fs.Open and os.Open are different in that aspect.
|
|
f, err = filesystem.Open(file)
|
|
if err != nil {
|
|
return ErrNotFound
|
|
}
|
|
defer f.Close()
|
|
if fi, err = f.Stat(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
ff, ok := f.(io.ReadSeeker)
|
|
if !ok {
|
|
return errors.New("file does not implement io.ReadSeeker")
|
|
}
|
|
http.ServeContent(c.Response(), c.Request(), fi.Name(), fi.ModTime(), ff)
|
|
return nil
|
|
}
|
|
|
|
// Attachment sends a response as attachment, prompting client to save the file.
|
|
func (c *DefaultContext) Attachment(file, name string) error {
|
|
return c.contentDisposition(file, name, "attachment")
|
|
}
|
|
|
|
// Inline sends a response as inline, opening the file in the browser.
|
|
func (c *DefaultContext) Inline(file, name string) error {
|
|
return c.contentDisposition(file, name, "inline")
|
|
}
|
|
|
|
func (c *DefaultContext) contentDisposition(file, name, dispositionType string) error {
|
|
c.response.Header().Set(HeaderContentDisposition, fmt.Sprintf("%s; filename=%q", dispositionType, name))
|
|
return c.File(file)
|
|
}
|
|
|
|
// NoContent sends a response with no body and a status code.
|
|
func (c *DefaultContext) NoContent(code int) error {
|
|
c.response.WriteHeader(code)
|
|
return nil
|
|
}
|
|
|
|
// Redirect redirects the request to a provided URL with status code.
|
|
func (c *DefaultContext) Redirect(code int, url string) error {
|
|
if code < 300 || code > 308 {
|
|
return ErrInvalidRedirectCode
|
|
}
|
|
c.response.Header().Set(HeaderLocation, url)
|
|
c.response.WriteHeader(code)
|
|
return nil
|
|
}
|
|
|
|
// Error invokes the registered global HTTP error handler. Generally used by middleware.
|
|
// A side-effect of calling global error handler is that now Response has been committed (sent to the client) and
|
|
// middlewares up in chain can not change Response status code or Response body anymore.
|
|
//
|
|
// Avoid using this method in handlers as no middleware will be able to effectively handle errors after that.
|
|
// Instead of calling this method in handler return your error and let it be handled by middlewares or global error handler.
|
|
func (c *DefaultContext) Error(err error) {
|
|
c.echo.HTTPErrorHandler(c, err)
|
|
}
|
|
|
|
// Echo returns the `Echo` instance.
|
|
func (c *DefaultContext) Echo() *Echo {
|
|
return c.echo
|
|
}
|