Back to godoc.org
github.com/caddyserver/caddy/v2/modules/caddyhttp

package caddyhttp

v2.1.1
Latest Go to latest
Published: 5 days ago | License: Apache-2.0 | Module: github.com/caddyserver/caddy/v2

Index

Constants

const (
	// DefaultHTTPPort is the default port for HTTP.
	DefaultHTTPPort = 80

	// DefaultHTTPSPort is the default port for HTTPS.
	DefaultHTTPSPort = 443
)
const (
	// For referencing the server instance
	ServerCtxKey caddy.CtxKey = "server"

	// For the request's variable table
	VarsCtxKey caddy.CtxKey = "vars"

	// For a partial copy of the unmodified request that
	// originally came into the server's entry handler
	OriginalRequestCtxKey caddy.CtxKey = "original_request"
)

Context keys for HTTP request context values.

const ErrorCtxKey = caddy.CtxKey("handler_chain_error")

ErrorCtxKey is the context key to use when storing an error (for use with context.Context).

Variables

var ErrNotImplemented = fmt.Errorf("method not implemented")

ErrNotImplemented is returned when an underlying ResponseWriter does not implement the required method.

func GetVar

func GetVar(ctx context.Context, key string) interface{}

GetVar gets a value out of the context's variable table by key. If the key does not exist, the return value will be nil.

func NewTestReplacer

func NewTestReplacer(req *http.Request) *caddy.Replacer

NewTestReplacer creates a replacer for an http.Request for use in tests that are not in this package

func PrepareRequest

func PrepareRequest(r *http.Request, repl *caddy.Replacer, w http.ResponseWriter, s *Server) *http.Request

PrepareRequest fills the request r for use in a Caddy HTTP handler chain. w and s can be nil, but the handlers will lose response placeholders and access to the server.

func SetVar

func SetVar(ctx context.Context, key string, value interface{})

SetVar sets a value in the context's variable table with the given key. It overwrites any previous value with the same key.

func StatusCodeMatches

func StatusCodeMatches(actual, configured int) bool

StatusCodeMatches returns true if a real HTTP status code matches the configured status code, which may be either a real HTTP status code or an integer representing a class of codes (e.g. 4 for all 4xx statuses).

type App

type App struct {
	// HTTPPort specifies the port to use for HTTP (as opposed to HTTPS),
	// which is used when setting up HTTP->HTTPS redirects or ACME HTTP
	// challenge solvers. Default: 80.
	HTTPPort int `json:"http_port,omitempty"`

	// HTTPSPort specifies the port to use for HTTPS, which is used when
	// solving the ACME TLS-ALPN challenges, or whenever HTTPS is needed
	// but no specific port number is given. Default: 443.
	HTTPSPort int `json:"https_port,omitempty"`

	// GracePeriod is how long to wait for active connections when shutting
	// down the server. Once the grace period is over, connections will
	// be forcefully closed.
	GracePeriod caddy.Duration `json:"grace_period,omitempty"`

	// Servers is the list of servers, keyed by arbitrary names chosen
	// at your discretion for your own convenience; the keys do not
	// affect functionality.
	Servers map[string]*Server `json:"servers,omitempty"`
	// contains filtered or unexported fields
}

App is a robust, production-ready HTTP server.

HTTPS is enabled by default if host matchers with qualifying names are used in any of routes; certificates are automatically provisioned and renewed. Additionally, automatic HTTPS will also enable HTTPS for servers that listen only on the HTTPS port but which do not have any TLS connection policies defined by adding a good, default TLS connection policy.

In HTTP routes, additional placeholders are available (replace any `*`):

Placeholder | Description ------------|--------------- `{http.request.cookie.*}` | HTTP request cookie `{http.request.header.*}` | Specific request header field `{http.request.host.labels.*}` | Request host labels (0-based from right); e.g. for foo.example.com: 0=com, 1=example, 2=foo `{http.request.host}` | The host part of the request's Host header `{http.request.hostport}` | The host and port from the request's Host header `{http.request.method}` | The request method `{http.request.orig_method}` | The request's original method `{http.request.orig_uri.path.dir}` | The request's original directory `{http.request.orig_uri.path.file}` | The request's original filename `{http.request.orig_uri.path}` | The request's original path `{http.request.orig_uri.query}` | The request's original query string (without `?`) `{http.request.orig_uri}` | The request's original URI `{http.request.port}` | The port part of the request's Host header `{http.request.proto}` | The protocol of the request `{http.request.remote.host}` | The host part of the remote client's address `{http.request.remote.port}` | The port part of the remote client's address `{http.request.remote}` | The address of the remote client `{http.request.scheme}` | The request scheme `{http.request.tls.version}` | The TLS version name `{http.request.tls.cipher_suite}` | The TLS cipher suite `{http.request.tls.resumed}` | The TLS connection resumed a previous connection `{http.request.tls.proto}` | The negotiated next protocol `{http.request.tls.proto_mutual}` | The negotiated next protocol was advertised by the server `{http.request.tls.server_name}` | The server name requested by the client, if any `{http.request.tls.client.fingerprint}` | The SHA256 checksum of the client certificate `{http.request.tls.client.public_key}` | The public key of the client certificate. `{http.request.tls.client.public_key_sha256}` | The SHA256 checksum of the client's public key. `{http.request.tls.client.issuer}` | The issuer DN of the client certificate `{http.request.tls.client.serial}` | The serial number of the client certificate `{http.request.tls.client.subject}` | The subject DN of the client certificate `{http.request.tls.client.san.dns_names.*}` | SAN DNS names(index optional) `{http.request.tls.client.san.emails.*}` | SAN email addresses (index optional) `{http.request.tls.client.san.ips.*}` | SAN IP addresses (index optional) `{http.request.tls.client.san.uris.*}` | SAN URIs (index optional) `{http.request.uri.path.*}` | Parts of the path, split by `/` (0-based from left) `{http.request.uri.path.dir}` | The directory, excluding leaf filename `{http.request.uri.path.file}` | The filename of the path, excluding directory `{http.request.uri.path}` | The path component of the request URI `{http.request.uri.query.*}` | Individual query string value `{http.request.uri.query}` | The query string (without `?`) `{http.request.uri}` | The full request URI `{http.response.header.*}` | Specific response header field `{http.vars.*}` | Custom variables in the HTTP handler chain

func (App) CaddyModule

func (App) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (*App) Provision

func (app *App) Provision(ctx caddy.Context) error

Provision sets up the app.

func (*App) Start

func (app *App) Start() error

Start runs the app. It finishes automatic HTTPS if enabled, including management of certificates.

func (*App) Stop

func (app *App) Stop() error

Stop gracefully shuts down the HTTP server.

func (*App) Validate

func (app *App) Validate() error

Validate ensures the app's configuration is valid.

type AutoHTTPSConfig

type AutoHTTPSConfig struct {
	// If true, automatic HTTPS will be entirely disabled.
	Disabled bool `json:"disable,omitempty"`

	// If true, only automatic HTTP->HTTPS redirects will
	// be disabled.
	DisableRedir bool `json:"disable_redirects,omitempty"`

	// Hosts/domain names listed here will not be included
	// in automatic HTTPS (they will not have certificates
	// loaded nor redirects applied).
	Skip []string `json:"skip,omitempty"`

	// Hosts/domain names listed here will still be enabled
	// for automatic HTTPS (unless in the Skip list), except
	// that certificates will not be provisioned and managed
	// for these names.
	SkipCerts []string `json:"skip_certificates,omitempty"`

	// By default, automatic HTTPS will obtain and renew
	// certificates for qualifying hostnames. However, if
	// a certificate with a matching SAN is already loaded
	// into the cache, certificate management will not be
	// enabled. To force automated certificate management
	// regardless of loaded certificates, set this to true.
	IgnoreLoadedCerts bool `json:"ignore_loaded_certificates,omitempty"`
}

AutoHTTPSConfig is used to disable automatic HTTPS or certain aspects of it for a specific server. HTTPS is enabled automatically and by default when qualifying hostnames are available from the config.

func (AutoHTTPSConfig) Skipped

func (ahc AutoHTTPSConfig) Skipped(name string, skipSlice []string) bool

Skipped returns true if name is in skipSlice, which should be either the Skip or SkipCerts field on ahc.

type HTTPErrorConfig

type HTTPErrorConfig struct {
	// The routes to evaluate after the primary handler
	// chain returns an error. In an error route, extra
	// placeholders are available:
	//
	// Placeholder | Description
	// ------------|---------------
	// `{http.error.status_code}` | The recommended HTTP status code
	// `{http.error.status_text}` | The status text associated with the recommended status code
	// `{http.error.message}`     | The error message
	// `{http.error.trace}`       | The origin of the error
	// `{http.error.id}`          | An identifier for this occurrence of the error
	Routes RouteList `json:"routes,omitempty"`
}

HTTPErrorConfig determines how to handle errors from the HTTP handlers.

func (*HTTPErrorConfig) WithError

func (*HTTPErrorConfig) WithError(r *http.Request, err error) *http.Request

WithError makes a shallow copy of r to add the error to its context, and sets placeholders on the request's replacer related to err. It returns the modified request which has the error information in its context and replacer. It overwrites any existing error values that are stored.

type HTTPInterfaces

type HTTPInterfaces interface {
	http.ResponseWriter
	http.Pusher
	http.Flusher
	http.Hijacker
}

HTTPInterfaces mix all the interfaces that middleware ResponseWriters need to support.

type Handler

type Handler interface {
	ServeHTTP(http.ResponseWriter, *http.Request) error
}

Handler is like http.Handler except ServeHTTP may return an error.

If any handler encounters an error, it should be returned for proper handling. Return values should be propagated down the middleware chain by returning it unchanged. Returned errors should not be re-wrapped if they are already HandlerError values.

type HandlerError

type HandlerError struct {
	Err        error // the original error value and message
	StatusCode int   // the HTTP status code to associate with this error

	ID    string // generated; for identifying this error in logs
	Trace string // produced from call stack
}

HandlerError is a serializable representation of an error from within an HTTP handler.

func Error

func Error(statusCode int, err error) HandlerError

Error is a convenient way for a Handler to populate the essential fields of a HandlerError. If err is itself a HandlerError, then any essential fields that are not set will be populated.

func (HandlerError) Error

func (e HandlerError) Error() string

type HandlerFunc

type HandlerFunc func(http.ResponseWriter, *http.Request) error

HandlerFunc is a convenience type like http.HandlerFunc.

func (HandlerFunc) ServeHTTP

func (f HandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request) error

ServeHTTP implements the Handler interface.

type LoggableHTTPHeader

type LoggableHTTPHeader http.Header

LoggableHTTPHeader makes an HTTP header loggable with zap.Object().

func (LoggableHTTPHeader) MarshalLogObject

func (h LoggableHTTPHeader) MarshalLogObject(enc zapcore.ObjectEncoder) error

MarshalLogObject satisfies the zapcore.ObjectMarshaler interface.

type LoggableHTTPRequest

type LoggableHTTPRequest struct{ *http.Request }

LoggableHTTPRequest makes an HTTP request loggable with zap.Object().

func (LoggableHTTPRequest) MarshalLogObject

func (r LoggableHTTPRequest) MarshalLogObject(enc zapcore.ObjectEncoder) error

MarshalLogObject satisfies the zapcore.ObjectMarshaler interface.

type LoggableStringArray

type LoggableStringArray []string

LoggableStringArray makes a slice of strings marshalable for logging.

func (LoggableStringArray) MarshalLogArray

func (sa LoggableStringArray) MarshalLogArray(enc zapcore.ArrayEncoder) error

MarshalLogArray satisfies the zapcore.ArrayMarshaler interface.

type LoggableTLSConnState

type LoggableTLSConnState tls.ConnectionState

LoggableTLSConnState makes a TLS connection state loggable with zap.Object().

func (LoggableTLSConnState) MarshalLogObject

func (t LoggableTLSConnState) MarshalLogObject(enc zapcore.ObjectEncoder) error

MarshalLogObject satisfies the zapcore.ObjectMarshaler interface.

type MatchExpression

type MatchExpression struct {
	// The CEL expression to evaluate. Any Caddy placeholders
	// will be expanded and situated into proper CEL function
	// calls before evaluating.
	Expr string
	// contains filtered or unexported fields
}

MatchExpression matches requests by evaluating a [CEL](https://github.com/google/cel-spec) expression. This enables complex logic to be expressed using a comfortable, familiar syntax. Please refer to [the standard definitions of CEL functions and operators](https://github.com/google/cel-spec/blob/master/doc/langdef.md#standard-definitions).

This matcher's JSON interface is actually a string, not a struct. The generated docs are not correct because this type has custom marshaling logic.

COMPATIBILITY NOTE: This module is still experimental and is not subject to Caddy's compatibility guarantee.

func (MatchExpression) CaddyModule

func (MatchExpression) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchExpression) MarshalJSON

func (m MatchExpression) MarshalJSON() ([]byte, error)

MarshalJSON marshals m's expression.

func (MatchExpression) Match

func (m MatchExpression) Match(r *http.Request) bool

Match returns true if r matches m.

func (*MatchExpression) Provision

func (m *MatchExpression) Provision(_ caddy.Context) error

Provision sets ups m.

func (*MatchExpression) UnmarshalCaddyfile

func (m *MatchExpression) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

func (*MatchExpression) UnmarshalJSON

func (m *MatchExpression) UnmarshalJSON(data []byte) error

UnmarshalJSON unmarshals m's expression.

type MatchHeader

type MatchHeader http.Header

MatchHeader matches requests by header fields. It performs fast, exact string comparisons of the field values. Fast prefix, suffix, and substring matches can also be done by suffixing, prefixing, or surrounding the value with the wildcard `*` character, respectively. If a list is null, the header must not exist. If the list is empty, the field must simply exist, regardless of its value.

func (MatchHeader) CaddyModule

func (MatchHeader) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchHeader) Match

func (m MatchHeader) Match(r *http.Request) bool

Match returns true if r matches m.

func (*MatchHeader) UnmarshalCaddyfile

func (m *MatchHeader) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

type MatchHeaderRE

type MatchHeaderRE map[string]*MatchRegexp

MatchHeaderRE matches requests by a regular expression on header fields.

Upon a match, it adds placeholders to the request: `{http.regexp.name.capture_group}` where `name` is the regular expression's name, and `capture_group` is either the named or positional capture group from the expression itself. If no name is given, then the placeholder omits the name: `{http.regexp.capture_group}` (potentially leading to collisions).

func (MatchHeaderRE) CaddyModule

func (MatchHeaderRE) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchHeaderRE) Match

func (m MatchHeaderRE) Match(r *http.Request) bool

Match returns true if r matches m.

func (MatchHeaderRE) Provision

func (m MatchHeaderRE) Provision(ctx caddy.Context) error

Provision compiles m's regular expressions.

func (*MatchHeaderRE) UnmarshalCaddyfile

func (m *MatchHeaderRE) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

func (MatchHeaderRE) Validate

func (m MatchHeaderRE) Validate() error

Validate validates m's regular expressions.

type MatchHost

type MatchHost []string

MatchHost matches requests by the Host value (case-insensitive).

When used in a top-level HTTP route, [qualifying domain names](/docs/automatic-https#hostname-requirements) may trigger [automatic HTTPS](/docs/automatic-https), which automatically provisions and renews certificates for you. Before doing this, you should ensure that DNS records for these domains are properly configured, especially A/AAAA pointed at your server.

Automatic HTTPS can be [customized or disabled](/docs/modules/http#servers/automatic_https).

Wildcards (`*`) may be used to represent exactly one label of the hostname, in accordance with RFC 1034 (because host matchers are also used for automatic HTTPS which influences TLS certificates). Thus, a host of `*` matches hosts like `localhost` or `internal` but not `example.com`. To catch all hosts, omit the host matcher entirely.

The wildcard can be useful for matching all subdomains, for example: `*.example.com` matches `foo.example.com` but not `foo.bar.example.com`.

func (MatchHost) CaddyModule

func (MatchHost) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchHost) Match

func (m MatchHost) Match(r *http.Request) bool

Match returns true if r matches m.

func (*MatchHost) UnmarshalCaddyfile

func (m *MatchHost) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

type MatchMethod

type MatchMethod []string

MatchMethod matches requests by the method.

func (MatchMethod) CaddyModule

func (MatchMethod) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchMethod) Match

func (m MatchMethod) Match(r *http.Request) bool

Match returns true if r matches m.

func (*MatchMethod) UnmarshalCaddyfile

func (m *MatchMethod) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

type MatchNot

type MatchNot struct {
	MatcherSetsRaw []caddy.ModuleMap `json:"-" caddy:"namespace=http.matchers"`
	MatcherSets    []MatcherSet      `json:"-"`
}

MatchNot matches requests by negating the results of its matcher sets. A single "not" matcher takes one or more matcher sets. Each matcher set is OR'ed; in other words, if any matcher set returns true, the final result of the "not" matcher is false. Individual matchers within a set work the same (i.e. different matchers in the same set are AND'ed).

Note that the generated docs which describe the structure of this module are wrong because of how this type unmarshals JSON in a custom way. The correct structure is:

```json [

{},
{}

] ```

where each of the array elements is a matcher set, i.e. an object keyed by matcher name.

func (MatchNot) CaddyModule

func (MatchNot) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchNot) MarshalJSON

func (m MatchNot) MarshalJSON() ([]byte, error)

MarshalJSON satisfies json.Marshaler by marshaling m's raw matcher sets.

func (MatchNot) Match

func (m MatchNot) Match(r *http.Request) bool

Match returns true if r matches m. Since this matcher negates the embedded matchers, false is returned if any of its matcher sets return true.

func (*MatchNot) Provision

func (m *MatchNot) Provision(ctx caddy.Context) error

Provision loads the matcher modules to be negated.

func (*MatchNot) UnmarshalCaddyfile

func (m *MatchNot) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

func (*MatchNot) UnmarshalJSON

func (m *MatchNot) UnmarshalJSON(data []byte) error

UnmarshalJSON satisfies json.Unmarshaler. It puts the JSON bytes directly into m's MatcherSetsRaw field.

type MatchPath

type MatchPath []string

MatchPath matches requests by the URI's path (case-insensitive). Path matches are exact, but wildcards may be used:

- At the end, for a prefix match (`/prefix/*`) - At the beginning, for a suffix match (`*.suffix`) - On both sides, for a substring match (`*/contains/*`) - In the middle, for a globular match (`/accounts/*/info`)

This matcher is fast, so it does not support regular expressions or capture groups. For slower but more powerful matching, use the path_regexp matcher.

func (MatchPath) CaddyModule

func (MatchPath) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchPath) Match

func (m MatchPath) Match(r *http.Request) bool

Match returns true if r matches m.

func (MatchPath) Provision

func (m MatchPath) Provision(_ caddy.Context) error

Provision lower-cases the paths in m to ensure case-insensitive matching.

func (*MatchPath) UnmarshalCaddyfile

func (m *MatchPath) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

type MatchPathRE

type MatchPathRE struct{ MatchRegexp }

MatchPathRE matches requests by a regular expression on the URI's path.

Upon a match, it adds placeholders to the request: `{http.regexp.name.capture_group}` where `name` is the regular expression's name, and `capture_group` is either the named or positional capture group from the expression itself. If no name is given, then the placeholder omits the name: `{http.regexp.capture_group}` (potentially leading to collisions).

func (MatchPathRE) CaddyModule

func (MatchPathRE) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchPathRE) Match

func (m MatchPathRE) Match(r *http.Request) bool

Match returns true if r matches m.

type MatchProtocol

type MatchProtocol string

MatchProtocol matches requests by protocol.

func (MatchProtocol) CaddyModule

func (MatchProtocol) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchProtocol) Match

func (m MatchProtocol) Match(r *http.Request) bool

Match returns true if r matches m.

func (*MatchProtocol) UnmarshalCaddyfile

func (m *MatchProtocol) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

type MatchQuery

type MatchQuery url.Values

MatchQuery matches requests by URI's query string.

func (MatchQuery) CaddyModule

func (MatchQuery) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchQuery) Match

func (m MatchQuery) Match(r *http.Request) bool

Match returns true if r matches m. An empty m matches an empty query string.

func (*MatchQuery) UnmarshalCaddyfile

func (m *MatchQuery) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

type MatchRegexp

type MatchRegexp struct {
	// A unique name for this regular expression. Optional,
	// but useful to prevent overwriting captures from other
	// regexp matchers.
	Name string `json:"name,omitempty"`

	// The regular expression to evaluate, in RE2 syntax,
	// which is the same general syntax used by Go, Perl,
	// and Python. For details, see
	// [Go's regexp package](https://golang.org/pkg/regexp/).
	// Captures are accessible via placeholders. Unnamed
	// capture groups are exposed as their numeric, 1-based
	// index, while named capture groups are available by
	// the capture group name.
	Pattern string `json:"pattern"`
	// contains filtered or unexported fields
}

MatchRegexp is an embedable type for matching using regular expressions. It adds placeholders to the request's replacer.

func (*MatchRegexp) Match

func (mre *MatchRegexp) Match(input string, repl *caddy.Replacer) bool

Match returns true if input matches the compiled regular expression in mre. It sets values on the replacer repl associated with capture groups, using the given scope (namespace).

func (*MatchRegexp) Provision

func (mre *MatchRegexp) Provision(caddy.Context) error

Provision compiles the regular expression.

func (*MatchRegexp) UnmarshalCaddyfile

func (mre *MatchRegexp) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

func (*MatchRegexp) Validate

func (mre *MatchRegexp) Validate() error

Validate ensures mre is set up correctly.

type MatchRemoteIP

type MatchRemoteIP struct {
	Ranges []string `json:"ranges,omitempty"`
	// contains filtered or unexported fields
}

MatchRemoteIP matches requests by client IP (or CIDR range).

func (MatchRemoteIP) CaddyModule

func (MatchRemoteIP) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchRemoteIP) Match

func (m MatchRemoteIP) Match(r *http.Request) bool

Match returns true if r matches m.

func (*MatchRemoteIP) Provision

func (m *MatchRemoteIP) Provision(ctx caddy.Context) error

Provision parses m's IP ranges, either from IP or CIDR expressions.

func (*MatchRemoteIP) UnmarshalCaddyfile

func (m *MatchRemoteIP) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile implements caddyfile.Unmarshaler.

type MatchVarsRE

type MatchVarsRE map[string]*MatchRegexp

MatchVarsRE matches the value of the context variables by a given regular expression.

Upon a match, it adds placeholders to the request: `{http.regexp.name.capture_group}` where `name` is the regular expression's name, and `capture_group` is either the named or positional capture group from the expression itself. If no name is given, then the placeholder omits the name: `{http.regexp.capture_group}` (potentially leading to collisions).

func (MatchVarsRE) CaddyModule

func (MatchVarsRE) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (MatchVarsRE) Match

func (m MatchVarsRE) Match(r *http.Request) bool

Match returns true if r matches m.

func (MatchVarsRE) Provision

func (m MatchVarsRE) Provision(ctx caddy.Context) error

Provision compiles m's regular expressions.

func (MatchVarsRE) Validate

func (m MatchVarsRE) Validate() error

Validate validates m's regular expressions.

type MatcherSet

type MatcherSet []RequestMatcher

MatcherSet is a set of matchers which must all match in order for the request to be matched successfully.

func (MatcherSet) Match

func (mset MatcherSet) Match(r *http.Request) bool

Match returns true if the request matches all matchers in mset or if there are no matchers.

type MatcherSets

type MatcherSets []MatcherSet

MatcherSets is a group of matcher sets capable of checking whether a request matches any of the sets.

func (MatcherSets) AnyMatch

func (ms MatcherSets) AnyMatch(req *http.Request) bool

AnyMatch returns true if req matches any of the matcher sets in ms or if there are no matchers, in which case the request always matches.

func (*MatcherSets) FromInterface

func (ms *MatcherSets) FromInterface(matcherSets interface{}) error

FromInterface fills ms from an interface{} value obtained from LoadModule.

type Middleware

type Middleware func(Handler) Handler

Middleware chains one Handler to the next by being passed the next Handler in the chain.

type MiddlewareHandler

type MiddlewareHandler interface {
	ServeHTTP(http.ResponseWriter, *http.Request, Handler) error
}

MiddlewareHandler is like Handler except it takes as a third argument the next handler in the chain. The next handler will never be nil, but may be a no-op handler if this is the last handler in the chain. Handlers which act as middleware should call the next handler's ServeHTTP method so as to propagate the request down the chain properly. Handlers which act as responders (content origins) need not invoke the next handler, since the last handler in the chain should be the first to write the response.

type RawMatcherSets

type RawMatcherSets []caddy.ModuleMap

RawMatcherSets is a group of matcher sets in their raw, JSON form.

type RequestMatcher

type RequestMatcher interface {
	Match(*http.Request) bool
}

RequestMatcher is a type that can match to a request. A route matcher MUST NOT modify the request, with the only exception being its context.

type ResponseHandler

type ResponseHandler struct {
	// The response matcher for this handler. If empty/nil,
	// it always matches.
	Match *ResponseMatcher `json:"match,omitempty"`

	// To write the original response body but with a different
	// status code, set this field to the desired status code.
	// If set, this takes priority over routes.
	StatusCode WeakString `json:"status_code,omitempty"`

	// The list of HTTP routes to execute if no status code is
	// specified. If evaluated, the original response body
	// will not be written.
	Routes RouteList `json:"routes,omitempty"`
}

ResponseHandler pairs a response matcher with custom handling logic. Either the status code can be changed to something else while using the original response body, or, if a status code is not set, it can execute a custom route list; this is useful for executing handler routes based on the properties of an HTTP response that has not been written out to the client yet.

To use this type, provision it at module load time, then when ready to use, match the response against its matcher; if it matches (or doesn't have a matcher), change the status code on the response if configured; otherwise invoke the routes by calling `rh.Routes.Compile(next).ServeHTTP(rw, req)` (or similar).

func (*ResponseHandler) Provision

func (rh *ResponseHandler) Provision(ctx caddy.Context) error

Provision sets up the routse in rh.

type ResponseMatcher

type ResponseMatcher struct {
	// If set, one of these status codes would be required.
	// A one-digit status can be used to represent all codes
	// in that class (e.g. 3 for all 3xx codes).
	StatusCode []int `json:"status_code,omitempty"`

	// If set, each header specified must be one of the
	// specified values, with the same logic used by the
	// request header matcher.
	Headers http.Header `json:"headers,omitempty"`
}

ResponseMatcher is a type which can determine if an HTTP response matches some criteria.

func (ResponseMatcher) Match

func (rm ResponseMatcher) Match(statusCode int, hdr http.Header) bool

Match returns true if the given statusCode and hdr match rm.

type ResponseRecorder

type ResponseRecorder interface {
	HTTPInterfaces
	Status() int
	Buffer() *bytes.Buffer
	Buffered() bool
	Size() int
	WriteResponse() error
}

ResponseRecorder is a http.ResponseWriter that records responses instead of writing them to the client. See docs for NewResponseRecorder for proper usage.

func NewResponseRecorder

func NewResponseRecorder(w http.ResponseWriter, buf *bytes.Buffer, shouldBuffer ShouldBufferFunc) ResponseRecorder

NewResponseRecorder returns a new ResponseRecorder that can be used instead of a standard http.ResponseWriter. The recorder is useful for middlewares which need to buffer a response and potentially process its entire body before actually writing the response to the underlying writer. Of course, buffering the entire body has a memory overhead, but sometimes there is no way to avoid buffering the whole response, hence the existence of this type. Still, if at all practical, handlers should strive to stream responses by wrapping Write and WriteHeader methods instead of buffering whole response bodies.

Buffering is actually optional. The shouldBuffer function will be called just before the headers are written. If it returns true, the headers and body will be buffered by this recorder and not written to the underlying writer; if false, the headers will be written immediately and the body will be streamed out directly to the underlying writer. If shouldBuffer is nil, the response will never be buffered and will always be streamed directly to the writer.

You can know if shouldBuffer returned true by calling Buffered().

The provided buffer buf should be obtained from a pool for best performance (see the sync.Pool type).

Proper usage of a recorder looks like this:

rec := caddyhttp.NewResponseRecorder(w, buf, shouldBuffer)
err := next.ServeHTTP(rec, req)
if err != nil {
    return err
}
if !rec.Buffered() {
    return nil
}
// process the buffered response here

The header map is not buffered; i.e. the ResponseRecorder's Header() method returns the same header map of the underlying ResponseWriter. This is a crucial design decision to allow HTTP trailers to be flushed properly (https://github.com/caddyserver/caddy/issues/3236).

Once you are ready to write the response, there are two ways you can do it. The easier way is to have the recorder do it:

rec.WriteResponse()

This writes the recorded response headers as well as the buffered body. Or, you may wish to do it yourself, especially if you manipulated the buffered body. First you will need to write the headers with the recorded status code, then write the body (this example writes the recorder's body buffer, but you might have your own body to write instead):

w.WriteHeader(rec.Status())
io.Copy(w, rec.Buffer())

type ResponseWriterWrapper

type ResponseWriterWrapper struct {
	http.ResponseWriter
}

ResponseWriterWrapper wraps an underlying ResponseWriter and promotes its Pusher/Flusher/Hijacker methods as well. To use this type, embed a pointer to it within your own struct type that implements the http.ResponseWriter interface, then call methods on the embedded value. You can make sure your type wraps correctly by asserting that it implements the HTTPInterfaces interface.

func (*ResponseWriterWrapper) Flush

func (rww *ResponseWriterWrapper) Flush()

Flush implements http.Flusher. It simply calls the underlying ResponseWriter's Flush method if there is one.

func (*ResponseWriterWrapper) Hijack

func (rww *ResponseWriterWrapper) Hijack() (net.Conn, *bufio.ReadWriter, error)

Hijack implements http.Hijacker. It simply calls the underlying ResponseWriter's Hijack method if there is one, or returns ErrNotImplemented otherwise.

func (*ResponseWriterWrapper) Push

func (rww *ResponseWriterWrapper) Push(target string, opts *http.PushOptions) error

Push implements http.Pusher. It simply calls the underlying ResponseWriter's Push method if there is one, or returns ErrNotImplemented otherwise.

type Route

type Route struct {
	// Group is an optional name for a group to which this
	// route belongs. Grouping a route makes it mutually
	// exclusive with others in its group; if a route belongs
	// to a group, only the first matching route in that group
	// will be executed.
	Group string `json:"group,omitempty"`

	// The matcher sets which will be used to qualify this
	// route for a request (essentially the "if" statement
	// of this route). Each matcher set is OR'ed, but matchers
	// within a set are AND'ed together.
	MatcherSetsRaw RawMatcherSets `json:"match,omitempty" caddy:"namespace=http.matchers"`

	// The list of handlers for this route. Upon matching a request, they are chained
	// together in a middleware fashion: requests flow from the first handler to the last
	// (top of the list to the bottom), with the possibility that any handler could stop
	// the chain and/or return an error. Responses flow back through the chain (bottom of
	// the list to the top) as they are written out to the client.
	//
	// Not all handlers call the next handler in the chain. For example, the reverse_proxy
	// handler always sends a request upstream or returns an error. Thus, configuring
	// handlers after reverse_proxy in the same route is illogical, since they would never
	// be executed. You will want to put handlers which originate the response at the very
	// end of your route(s). The documentation for a module should state whether it invokes
	// the next handler, but sometimes it is common sense.
	//
	// Some handlers manipulate the response. Remember that requests flow down the list, and
	// responses flow up the list.
	//
	// For example, if you wanted to use both `templates` and `encode` handlers, you would
	// need to put `templates` after `encode` in your route, because responses flow up.
	// Thus, `templates` will be able to parse and execute the plain-text response as a
	// template, and then return it up to the `encode` handler which will then compress it
	// into a binary format.
	//
	// If `templates` came before `encode`, then `encode` would write a compressed,
	// binary-encoded response to `templates` which would not be able to parse the response
	// properly.
	//
	// The correct order, then, is this:
	//
	//     [
	//         {"handler": "encode"},
	//         {"handler": "templates"},
	//         {"handler": "file_server"}
	//     ]
	//
	// The request flows ⬇️ DOWN (`encode` -> `templates` -> `file_server`).
	//
	// 1. First, `encode` will choose how to `encode` the response and wrap the response.
	// 2. Then, `templates` will wrap the response with a buffer.
	// 3. Finally, `file_server` will originate the content from a file.
	//
	// The response flows ⬆️ UP (`file_server` -> `templates` -> `encode`):
	//
	// 1. First, `file_server` will write the file to the response.
	// 2. That write will be buffered and then executed by `templates`.
	// 3. Lastly, the write from `templates` will flow into `encode` which will compress the stream.
	//
	// If you think of routes in this way, it will be easy and even fun to solve the puzzle of writing correct routes.
	HandlersRaw []json.RawMessage `json:"handle,omitempty" caddy:"namespace=http.handlers inline_key=handler"`

	// If true, no more routes will be executed after this one.
	Terminal bool `json:"terminal,omitempty"`

	// decoded values
	MatcherSets MatcherSets         `json:"-"`
	Handlers    []MiddlewareHandler `json:"-"`
	// contains filtered or unexported fields
}

Route consists of a set of rules for matching HTTP requests, a list of handlers to execute, and optional flow control parameters which customize the handling of HTTP requests in a highly flexible and performant manner.

func (Route) Empty

func (r Route) Empty() bool

Empty returns true if the route has all zero/default values.

type RouteList

type RouteList []Route

RouteList is a list of server routes that can create a middleware chain.

func (RouteList) Compile

func (routes RouteList) Compile(next Handler) Handler

Compile prepares a middleware chain from the route list. This should only be done once: after all the routes have been provisioned, and before serving requests.

func (RouteList) Provision

func (routes RouteList) Provision(ctx caddy.Context) error

Provision sets up both the matchers and handlers in the routes.

func (RouteList) ProvisionHandlers

func (routes RouteList) ProvisionHandlers(ctx caddy.Context) error

ProvisionHandlers sets up all the handlers by loading the handler modules. Only call this method directly if you need to set up matchers and handlers separately without having to provision a second time; otherwise use Provision instead.

func (RouteList) ProvisionMatchers

func (routes RouteList) ProvisionMatchers(ctx caddy.Context) error

ProvisionMatchers sets up all the matchers by loading the matcher modules. Only call this method directly if you need to set up matchers and handlers separately without having to provision a second time; otherwise use Provision instead.

type Server

type Server struct {
	// Socket addresses to which to bind listeners. Accepts
	// [network addresses](/docs/conventions#network-addresses)
	// that may include port ranges. Listener addresses must
	// be unique; they cannot be repeated across all defined
	// servers.
	Listen []string `json:"listen,omitempty"`

	// A list of listener wrapper modules, which can modify the behavior
	// of the base listener. They are applied in the given order.
	ListenerWrappersRaw []json.RawMessage `json:"listener_wrappers,omitempty" caddy:"namespace=caddy.listeners inline_key=wrapper"`

	// How long to allow a read from a client's upload. Setting this
	// to a short, non-zero value can mitigate slowloris attacks, but
	// may also affect legitimately slow clients.
	ReadTimeout caddy.Duration `json:"read_timeout,omitempty"`

	// ReadHeaderTimeout is like ReadTimeout but for request headers.
	ReadHeaderTimeout caddy.Duration `json:"read_header_timeout,omitempty"`

	// WriteTimeout is how long to allow a write to a client. Note
	// that setting this to a small value when serving large files
	// may negatively affect legitimately slow clients.
	WriteTimeout caddy.Duration `json:"write_timeout,omitempty"`

	// IdleTimeout is the maximum time to wait for the next request
	// when keep-alives are enabled. If zero, ReadTimeout is used.
	// If both are zero, there is no timeout.
	IdleTimeout caddy.Duration `json:"idle_timeout,omitempty"`

	// MaxHeaderBytes is the maximum size to parse from a client's
	// HTTP request headers.
	MaxHeaderBytes int `json:"max_header_bytes,omitempty"`

	// Routes describes how this server will handle requests.
	// Routes are executed sequentially. First a route's matchers
	// are evaluated, then its grouping. If it matches and has
	// not been mutually-excluded by its grouping, then its
	// handlers are executed sequentially. The sequence of invoked
	// handlers comprises a compiled middleware chain that flows
	// from each matching route and its handlers to the next.
	Routes RouteList `json:"routes,omitempty"`

	// Errors is how this server will handle errors returned from any
	// of the handlers in the primary routes. If the primary handler
	// chain returns an error, the error along with its recommended
	// status code are bubbled back up to the HTTP server which
	// executes a separate error route, specified using this property.
	// The error routes work exactly like the normal routes.
	Errors *HTTPErrorConfig `json:"errors,omitempty"`

	// How to handle TLS connections. At least one policy is
	// required to enable HTTPS on this server if automatic
	// HTTPS is disabled or does not apply.
	TLSConnPolicies caddytls.ConnectionPolicies `json:"tls_connection_policies,omitempty"`

	// AutoHTTPS configures or disables automatic HTTPS within this server.
	// HTTPS is enabled automatically and by default when qualifying names
	// are present in a Host matcher and/or when the server is listening
	// only on the HTTPS port.
	AutoHTTPS *AutoHTTPSConfig `json:"automatic_https,omitempty"`

	// If true, will require that a request's Host header match
	// the value of the ServerName sent by the client's TLS
	// ClientHello; often a necessary safeguard when using TLS
	// client authentication.
	StrictSNIHost *bool `json:"strict_sni_host,omitempty"`

	// Enables access logging and configures how access logs are handled
	// in this server. To minimally enable access logs, simply set this
	// to a non-null, empty struct.
	Logs *ServerLogConfig `json:"logs,omitempty"`

	// Enable experimental HTTP/3 support. Note that HTTP/3 is not a
	// finished standard and has extremely limited client support.
	// This field is not subject to compatibility promises.
	ExperimentalHTTP3 bool `json:"experimental_http3,omitempty"`

	// Enables H2C ("Cleartext HTTP/2" or "H2 over TCP") support,
	// which will serve HTTP/2 over plaintext TCP connections if
	// a client support it. Because this is not implemented by the
	// Go standard library, using H2C is incompatible with most
	// of the other options for this server. Do not enable this
	// only to achieve maximum client compatibility. In practice,
	// very few clients implement H2C, and even fewer require it.
	// This setting applies only to unencrypted HTTP listeners.
	// ⚠️ Experimental feature; subject to change or removal.
	AllowH2C bool `json:"allow_h2c,omitempty"`
	// contains filtered or unexported fields
}

Server describes an HTTP server.

func (*Server) ServeHTTP

func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request)

ServeHTTP is the entry point for all HTTP requests.

type ServerLogConfig

type ServerLogConfig struct {
	// The default logger name for all logs emitted by this server for
	// hostnames that are not in the LoggerNames (logger_names) map.
	DefaultLoggerName string `json:"default_logger_name,omitempty"`

	// LoggerNames maps request hostnames to a custom logger name.
	// For example, a mapping of "example.com" to "example" would
	// cause access logs from requests with a Host of example.com
	// to be emitted by a logger named "http.log.access.example".
	LoggerNames map[string]string `json:"logger_names,omitempty"`

	// By default, all requests to this server will be logged if
	// access logging is enabled. This field lists the request
	// hosts for which access logging should be disabled.
	SkipHosts []string `json:"skip_hosts,omitempty"`

	// If true, requests to any host not appearing in the
	// LoggerNames (logger_names) map will not be logged.
	SkipUnmappedHosts bool `json:"skip_unmapped_hosts,omitempty"`
}

ServerLogConfig describes a server's logging configuration. If enabled without customization, all requests to this server are logged to the default logger; logger destinations may be customized per-request-host.

type ShouldBufferFunc

type ShouldBufferFunc func(status int, header http.Header) bool

ShouldBufferFunc is a function that returns true if the response should be buffered, given the pending HTTP status code and response headers.

type StaticError

type StaticError struct {
	// The error message. Optional. Default is no error message.
	Error string `json:"error,omitempty"`

	// The recommended HTTP status code. Can be either an integer or a
	// string if placeholders are needed. Optional. Default is 500.
	StatusCode WeakString `json:"status_code,omitempty"`
}

StaticError implements a simple handler that returns an error. This handler returns an error value, but does not write a response. This is useful when you want the server to act as if an error occurred; for example, to invoke your custom error handling logic.

Since this handler does not write a response, the error information is for use by the server to know how to handle the error.

func (StaticError) CaddyModule

func (StaticError) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (StaticError) ServeHTTP

func (e StaticError) ServeHTTP(w http.ResponseWriter, r *http.Request, _ Handler) error

type StaticResponse

type StaticResponse struct {
	// The HTTP status code to respond with. Can be an integer or,
	// if needing to use a placeholder, a string.
	StatusCode WeakString `json:"status_code,omitempty"`

	// Header fields to set on the response.
	Headers http.Header `json:"headers,omitempty"`

	// The response body.
	Body string `json:"body,omitempty"`

	// If true, the server will close the client's connection
	// after writing the response.
	Close bool `json:"close,omitempty"`
}

StaticResponse implements a simple responder for static responses.

func (StaticResponse) CaddyModule

func (StaticResponse) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (StaticResponse) ServeHTTP

func (s StaticResponse) ServeHTTP(w http.ResponseWriter, r *http.Request, _ Handler) error

func (*StaticResponse) UnmarshalCaddyfile

func (s *StaticResponse) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile sets up the handler from Caddyfile tokens. Syntax:

respond [<matcher>] <status>|<body> [<status>] {
    body <text>
    close
}

If there is just one argument (other than the matcher), it is considered to be a status code if it's a valid positive integer of 3 digits.

type Subroute

type Subroute struct {
	// The primary list of routes to compile and execute.
	Routes RouteList `json:"routes,omitempty"`

	// If the primary routes return an error, error handling
	// can be promoted to this configuration instead.
	Errors *HTTPErrorConfig `json:"errors,omitempty"`
}

Subroute implements a handler that compiles and executes routes. This is useful for a batch of routes that all inherit the same matchers, or for multiple routes that should be treated as a single route.

You can also use subroutes to handle errors from its handlers. First the primary routes will be executed, and if they return an error, the errors routes will be executed; in that case, an error is only returned to the entry point at the server if there is an additional error returned from the errors routes.

func (Subroute) CaddyModule

func (Subroute) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (*Subroute) Provision

func (sr *Subroute) Provision(ctx caddy.Context) error

Provision sets up subrouting.

func (*Subroute) ServeHTTP

func (sr *Subroute) ServeHTTP(w http.ResponseWriter, r *http.Request, next Handler) error

type VarsMatcher

type VarsMatcher map[string]string

VarsMatcher is an HTTP request matcher which can match requests based on variables in the context.

func (VarsMatcher) CaddyModule

func (VarsMatcher) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (VarsMatcher) Match

func (m VarsMatcher) Match(r *http.Request) bool

Match matches a request based on variables in the context.

type VarsMiddleware

type VarsMiddleware map[string]string

VarsMiddleware is an HTTP middleware which sets variables in the context, mainly for use by placeholders. The placeholders have the form: `{http.vars.variable_name}`

func (VarsMiddleware) CaddyModule

func (VarsMiddleware) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (VarsMiddleware) ServeHTTP

func (t VarsMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request, next Handler) error

type WeakString

type WeakString string

WeakString is a type that unmarshals any JSON value as a string literal, with the following exceptions:

1. actual string values are decoded as strings; and 2. null is decoded as empty string;

and provides methods for getting the value as various primitive types. However, using this type removes any type safety as far as deserializing JSON is concerned.

func (WeakString) Bool

func (ws WeakString) Bool() bool

Bool returns ws as a boolean. If ws is not a boolean, false is returned.

func (WeakString) Float64

func (ws WeakString) Float64() float64

Float64 returns ws as a float64. If ws is not a float value, the zero value is returned.

func (WeakString) Int

func (ws WeakString) Int() int

Int returns ws as an integer. If ws is not an integer, 0 is returned.

func (WeakString) MarshalJSON

func (ws WeakString) MarshalJSON() ([]byte, error)

MarshalJSON marshals was a boolean if true or false, a number if an integer, or a string otherwise.

func (WeakString) String

func (ws WeakString) String() string

String returns ws as a string.

func (*WeakString) UnmarshalJSON

func (ws *WeakString) UnmarshalJSON(b []byte) error

UnmarshalJSON satisfies json.Unmarshaler according to this type's documentation.

Documentation was rendered with GOOS=linux and GOARCH=amd64.

Jump to identifier

Keyboard shortcuts

? : This menu
f or F : Jump to identifier