forked from lug/matterbridge
Update dependencies and build to go1.22 (#2113)
* Update dependencies and build to go1.22 * Fix api changes wrt to dependencies * Update golangci config
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Wim
196
vendor/github.com/labstack/echo/v4/middleware/proxy.go
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vendored
196
vendor/github.com/labstack/echo/v4/middleware/proxy.go
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@@ -1,3 +1,6 @@
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// SPDX-License-Identifier: MIT
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// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
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package middleware
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import (
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@@ -19,117 +22,113 @@ import (
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// TODO: Handle TLS proxy
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type (
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// ProxyConfig defines the config for Proxy middleware.
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ProxyConfig struct {
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// Skipper defines a function to skip middleware.
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Skipper Skipper
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// ProxyConfig defines the config for Proxy middleware.
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type ProxyConfig struct {
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// Skipper defines a function to skip middleware.
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Skipper Skipper
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// Balancer defines a load balancing technique.
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// Required.
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Balancer ProxyBalancer
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// Balancer defines a load balancing technique.
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// Required.
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Balancer ProxyBalancer
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// RetryCount defines the number of times a failed proxied request should be retried
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// using the next available ProxyTarget. Defaults to 0, meaning requests are never retried.
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RetryCount int
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// RetryCount defines the number of times a failed proxied request should be retried
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// using the next available ProxyTarget. Defaults to 0, meaning requests are never retried.
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RetryCount int
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// RetryFilter defines a function used to determine if a failed request to a
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// ProxyTarget should be retried. The RetryFilter will only be called when the number
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// of previous retries is less than RetryCount. If the function returns true, the
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// request will be retried. The provided error indicates the reason for the request
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// failure. When the ProxyTarget is unavailable, the error will be an instance of
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// echo.HTTPError with a Code of http.StatusBadGateway. In all other cases, the error
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// will indicate an internal error in the Proxy middleware. When a RetryFilter is not
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// specified, all requests that fail with http.StatusBadGateway will be retried. A custom
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// RetryFilter can be provided to only retry specific requests. Note that RetryFilter is
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// only called when the request to the target fails, or an internal error in the Proxy
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// middleware has occurred. Successful requests that return a non-200 response code cannot
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// be retried.
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RetryFilter func(c echo.Context, e error) bool
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// RetryFilter defines a function used to determine if a failed request to a
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// ProxyTarget should be retried. The RetryFilter will only be called when the number
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// of previous retries is less than RetryCount. If the function returns true, the
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// request will be retried. The provided error indicates the reason for the request
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// failure. When the ProxyTarget is unavailable, the error will be an instance of
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// echo.HTTPError with a Code of http.StatusBadGateway. In all other cases, the error
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// will indicate an internal error in the Proxy middleware. When a RetryFilter is not
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// specified, all requests that fail with http.StatusBadGateway will be retried. A custom
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// RetryFilter can be provided to only retry specific requests. Note that RetryFilter is
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// only called when the request to the target fails, or an internal error in the Proxy
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// middleware has occurred. Successful requests that return a non-200 response code cannot
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// be retried.
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RetryFilter func(c echo.Context, e error) bool
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// ErrorHandler defines a function which can be used to return custom errors from
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// the Proxy middleware. ErrorHandler is only invoked when there has been
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// either an internal error in the Proxy middleware or the ProxyTarget is
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// unavailable. Due to the way requests are proxied, ErrorHandler is not invoked
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// when a ProxyTarget returns a non-200 response. In these cases, the response
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// is already written so errors cannot be modified. ErrorHandler is only
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// invoked after all retry attempts have been exhausted.
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ErrorHandler func(c echo.Context, err error) error
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// ErrorHandler defines a function which can be used to return custom errors from
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// the Proxy middleware. ErrorHandler is only invoked when there has been
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// either an internal error in the Proxy middleware or the ProxyTarget is
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// unavailable. Due to the way requests are proxied, ErrorHandler is not invoked
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// when a ProxyTarget returns a non-200 response. In these cases, the response
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// is already written so errors cannot be modified. ErrorHandler is only
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// invoked after all retry attempts have been exhausted.
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ErrorHandler func(c echo.Context, err error) error
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// Rewrite defines URL path rewrite rules. The values captured in asterisk can be
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// retrieved by index e.g. $1, $2 and so on.
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// Examples:
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// "/old": "/new",
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// "/api/*": "/$1",
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// "/js/*": "/public/javascripts/$1",
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// "/users/*/orders/*": "/user/$1/order/$2",
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Rewrite map[string]string
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// Rewrite defines URL path rewrite rules. The values captured in asterisk can be
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// retrieved by index e.g. $1, $2 and so on.
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// Examples:
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// "/old": "/new",
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// "/api/*": "/$1",
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// "/js/*": "/public/javascripts/$1",
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// "/users/*/orders/*": "/user/$1/order/$2",
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Rewrite map[string]string
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// RegexRewrite defines rewrite rules using regexp.Rexexp with captures
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// Every capture group in the values can be retrieved by index e.g. $1, $2 and so on.
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// Example:
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// "^/old/[0.9]+/": "/new",
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// "^/api/.+?/(.*)": "/v2/$1",
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RegexRewrite map[*regexp.Regexp]string
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// RegexRewrite defines rewrite rules using regexp.Rexexp with captures
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// Every capture group in the values can be retrieved by index e.g. $1, $2 and so on.
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// Example:
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// "^/old/[0.9]+/": "/new",
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// "^/api/.+?/(.*)": "/v2/$1",
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RegexRewrite map[*regexp.Regexp]string
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// Context key to store selected ProxyTarget into context.
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// Optional. Default value "target".
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ContextKey string
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// Context key to store selected ProxyTarget into context.
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// Optional. Default value "target".
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ContextKey string
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// To customize the transport to remote.
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// Examples: If custom TLS certificates are required.
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Transport http.RoundTripper
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// To customize the transport to remote.
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// Examples: If custom TLS certificates are required.
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Transport http.RoundTripper
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// ModifyResponse defines function to modify response from ProxyTarget.
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ModifyResponse func(*http.Response) error
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}
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// ModifyResponse defines function to modify response from ProxyTarget.
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ModifyResponse func(*http.Response) error
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}
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// ProxyTarget defines the upstream target.
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ProxyTarget struct {
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Name string
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URL *url.URL
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Meta echo.Map
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}
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// ProxyTarget defines the upstream target.
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type ProxyTarget struct {
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Name string
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URL *url.URL
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Meta echo.Map
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}
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// ProxyBalancer defines an interface to implement a load balancing technique.
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ProxyBalancer interface {
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AddTarget(*ProxyTarget) bool
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RemoveTarget(string) bool
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Next(echo.Context) *ProxyTarget
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}
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// ProxyBalancer defines an interface to implement a load balancing technique.
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type ProxyBalancer interface {
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AddTarget(*ProxyTarget) bool
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RemoveTarget(string) bool
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Next(echo.Context) *ProxyTarget
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}
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// TargetProvider defines an interface that gives the opportunity for balancer
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// to return custom errors when selecting target.
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TargetProvider interface {
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NextTarget(echo.Context) (*ProxyTarget, error)
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}
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// TargetProvider defines an interface that gives the opportunity for balancer
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// to return custom errors when selecting target.
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type TargetProvider interface {
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NextTarget(echo.Context) (*ProxyTarget, error)
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}
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commonBalancer struct {
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targets []*ProxyTarget
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mutex sync.Mutex
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}
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type commonBalancer struct {
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targets []*ProxyTarget
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mutex sync.Mutex
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}
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// RandomBalancer implements a random load balancing technique.
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randomBalancer struct {
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commonBalancer
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random *rand.Rand
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}
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// RandomBalancer implements a random load balancing technique.
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type randomBalancer struct {
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commonBalancer
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random *rand.Rand
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}
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// RoundRobinBalancer implements a round-robin load balancing technique.
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roundRobinBalancer struct {
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commonBalancer
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// tracking the index on `targets` slice for the next `*ProxyTarget` to be used
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i int
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}
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)
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// RoundRobinBalancer implements a round-robin load balancing technique.
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type roundRobinBalancer struct {
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commonBalancer
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// tracking the index on `targets` slice for the next `*ProxyTarget` to be used
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i int
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}
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var (
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// DefaultProxyConfig is the default Proxy middleware config.
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DefaultProxyConfig = ProxyConfig{
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Skipper: DefaultSkipper,
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ContextKey: "target",
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}
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)
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// DefaultProxyConfig is the default Proxy middleware config.
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var DefaultProxyConfig = ProxyConfig{
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Skipper: DefaultSkipper,
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ContextKey: "target",
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}
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func proxyRaw(t *ProxyTarget, c echo.Context) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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@@ -359,12 +358,15 @@ func ProxyWithConfig(config ProxyConfig) echo.MiddlewareFunc {
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c.Set("_error", nil)
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}
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// This is needed for ProxyConfig.ModifyResponse and/or ProxyConfig.Transport to be able to process the Request
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// that Balancer may have replaced with c.SetRequest.
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req = c.Request()
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// Proxy
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switch {
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case c.IsWebSocket():
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proxyRaw(tgt, c).ServeHTTP(res, req)
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case req.Header.Get(echo.HeaderAccept) == "text/event-stream":
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default:
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default: // even SSE requests
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proxyHTTP(tgt, c, config).ServeHTTP(res, req)
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}
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