func rewriteParse(c *caddy.Controller) ([]httpserver.HandlerConfig, error) {
var rules []httpserver.HandlerConfig
for c.Next() {
var rule Rule
var err error
var base = "/"
var pattern, to string
var ext []string
args := c.RemainingArgs()
var matcher httpserver.RequestMatcher
switch len(args) {
case 1:
base = args[0]
fallthrough
case 0:
// Integrate request matcher for 'if' conditions.
matcher, err = httpserver.SetupIfMatcher(c)
if err != nil {
return nil, err
}
for c.NextBlock() {
if httpserver.IfMatcherKeyword(c) {
continue
}
switch c.Val() {
case "r", "regexp":
if !c.NextArg() {
return nil, c.ArgErr()
}
pattern = c.Val()
case "to":
args1 := c.RemainingArgs()
if len(args1) == 0 {
return nil, c.ArgErr()
}
to = strings.Join(args1, " ")
case "ext":
args1 := c.RemainingArgs()
if len(args1) == 0 {
return nil, c.ArgErr()
}
ext = args1
default:
return nil, c.ArgErr()
}
}
// ensure to is specified
if to == "" {
return nil, c.ArgErr()
}
if rule, err = NewComplexRule(base, pattern, to, ext, matcher); err != nil {
return nil, err
}
rules = append(rules, rule)
// the only unhandled case is 2 and above
default:
rule = NewSimpleRule(args[0], strings.Join(args[1:], " "))
rules = append(rules, rule)
}
}
return rules, nil
}
func redirParse(c *caddy.Controller) ([]Rule, error) {
var redirects []Rule
cfg := httpserver.GetConfig(c)
initRule := func(rule *Rule, defaultCode string, args []string) error {
if cfg.TLS.Enabled {
rule.FromScheme = "https"
} else {
rule.FromScheme = "http"
}
var (
from = "/"
to string
code = defaultCode
)
switch len(args) {
case 1:
// To specified (catch-all redirect)
// Not sure why user is doing this in a table, as it causes all other redirects to be ignored.
// As such, this feature remains undocumented.
to = args[0]
case 2:
// From and To specified
from = args[0]
to = args[1]
case 3:
// From, To, and Code specified
from = args[0]
to = args[1]
code = args[2]
default:
return c.ArgErr()
}
rule.FromPath = from
rule.To = to
if code == "meta" {
rule.Meta = true
code = defaultCode
}
if codeNumber, ok := httpRedirs[code]; ok {
rule.Code = codeNumber
} else {
return c.Errf("Invalid redirect code '%v'", code)
}
return nil
}
// checkAndSaveRule checks the rule for validity (except the redir code)
// and saves it if it's valid, or returns an error.
checkAndSaveRule := func(rule Rule) error {
if rule.FromPath == rule.To {
return c.Err("'from' and 'to' values of redirect rule cannot be the same")
}
for _, otherRule := range redirects {
if otherRule.FromPath == rule.FromPath {
return c.Errf("rule with duplicate 'from' value: %s -> %s", otherRule.FromPath, otherRule.To)
}
}
redirects = append(redirects, rule)
return nil
}
const initDefaultCode = "301"
for c.Next() {
args := c.RemainingArgs()
matcher, err := httpserver.SetupIfMatcher(c)
if err != nil {
return nil, err
}
var hadOptionalBlock bool
for c.NextBlock() {
if httpserver.IfMatcherKeyword(c) {
continue
}
hadOptionalBlock = true
rule := Rule{
RequestMatcher: matcher,
}
defaultCode := initDefaultCode
// Set initial redirect code
if len(args) == 1 {
defaultCode = args[0]
}
// RemainingArgs only gets the values after the current token, but in our
// case we want to include the current token to get an accurate count.
insideArgs := append([]string{c.Val()}, c.RemainingArgs()...)
err := initRule(&rule, defaultCode, insideArgs)
if err != nil {
return redirects, err
}
err = checkAndSaveRule(rule)
if err != nil {
return redirects, err
}
}
if !hadOptionalBlock {
rule := Rule{
RequestMatcher: matcher,
}
err := initRule(&rule, initDefaultCode, args)
if err != nil {
return redirects, err
}
err = checkAndSaveRule(rule)
if err != nil {
return redirects, err
}
}
}
return redirects, nil
}
func redirParse(c *caddy.Controller) ([]Rule, error) {
var redirects []Rule
cfg := httpserver.GetConfig(c)
// setRedirCode sets the redirect code for rule if it can, or returns an error
setRedirCode := func(code string, rule *Rule) error {
if code == "meta" {
rule.Meta = true
} else if codeNumber, ok := httpRedirs[code]; ok {
rule.Code = codeNumber
} else {
return c.Errf("Invalid redirect code '%v'", code)
}
return nil
}
// checkAndSaveRule checks the rule for validity (except the redir code)
// and saves it if it's valid, or returns an error.
checkAndSaveRule := func(rule Rule) error {
if rule.FromPath == rule.To {
return c.Err("'from' and 'to' values of redirect rule cannot be the same")
}
for _, otherRule := range redirects {
if otherRule.FromPath == rule.FromPath {
return c.Errf("rule with duplicate 'from' value: %s -> %s", otherRule.FromPath, otherRule.To)
}
}
redirects = append(redirects, rule)
return nil
}
for c.Next() {
matcher, err := httpserver.SetupIfMatcher(c.Dispenser)
if err != nil {
return nil, err
}
args := c.RemainingArgs()
var hadOptionalBlock bool
for c.NextBlock() {
if httpserver.IfMatcherKeyword(c.Val()) {
continue
}
hadOptionalBlock = true
var rule = Rule{
RequestMatcher: matcher,
}
if cfg.TLS.Enabled {
rule.FromScheme = "https"
} else {
rule.FromScheme = "http"
}
// Set initial redirect code
// BUG: If the code is specified for a whole block and that code is invalid,
// the line number will appear on the first line inside the block, even if that
// line overwrites the block-level code with a valid redirect code. The program
// still functions correctly, but the line number in the error reporting is
// misleading to the user.
if len(args) == 1 {
err := setRedirCode(args[0], &rule)
if err != nil {
return redirects, err
}
} else {
rule.Code = http.StatusMovedPermanently // default code
}
// RemainingArgs only gets the values after the current token, but in our
// case we want to include the current token to get an accurate count.
insideArgs := append([]string{c.Val()}, c.RemainingArgs()...)
switch len(insideArgs) {
case 1:
// To specified (catch-all redirect)
// Not sure why user is doing this in a table, as it causes all other redirects to be ignored.
// As such, this feature remains undocumented.
rule.FromPath = "/"
rule.To = insideArgs[0]
case 2:
// From and To specified
rule.FromPath = insideArgs[0]
rule.To = insideArgs[1]
case 3:
// From, To, and Code specified
rule.FromPath = insideArgs[0]
rule.To = insideArgs[1]
err := setRedirCode(insideArgs[2], &rule)
if err != nil {
return redirects, err
}
default:
return redirects, c.ArgErr()
}
err := checkAndSaveRule(rule)
if err != nil {
return redirects, err
}
}
if !hadOptionalBlock {
var rule = Rule{
RequestMatcher: matcher,
}
if cfg.TLS.Enabled {
rule.FromScheme = "https"
} else {
rule.FromScheme = "http"
}
rule.Code = http.StatusMovedPermanently // default
switch len(args) {
case 1:
// To specified (catch-all redirect)
rule.FromPath = "/"
rule.To = args[0]
case 2:
// To and Code specified (catch-all redirect)
rule.FromPath = "/"
rule.To = args[0]
err := setRedirCode(args[1], &rule)
if err != nil {
return redirects, err
}
case 3:
// From, To, and Code specified
rule.FromPath = args[0]
rule.To = args[1]
err := setRedirCode(args[2], &rule)
if err != nil {
return redirects, err
}
default:
return redirects, c.ArgErr()
}
err := checkAndSaveRule(rule)
if err != nil {
return redirects, err
}
}
}
return redirects, nil
}
func rewriteParse(c *caddy.Controller) ([]Rule, error) {
var simpleRules []Rule
var regexpRules []Rule
for c.Next() {
var rule Rule
var err error
var base = "/"
var pattern, to string
var status int
var ext []string
args := c.RemainingArgs()
var matcher httpserver.RequestMatcher
switch len(args) {
case 1:
base = args[0]
fallthrough
case 0:
// Integrate request matcher for 'if' conditions.
matcher, err = httpserver.SetupIfMatcher(c.Dispenser)
if err != nil {
return nil, err
}
block:
for c.NextBlock() {
switch c.Val() {
case "r", "regexp":
if !c.NextArg() {
return nil, c.ArgErr()
}
pattern = c.Val()
case "to":
args1 := c.RemainingArgs()
if len(args1) == 0 {
return nil, c.ArgErr()
}
to = strings.Join(args1, " ")
case "ext":
args1 := c.RemainingArgs()
if len(args1) == 0 {
return nil, c.ArgErr()
}
ext = args1
case "status":
if !c.NextArg() {
return nil, c.ArgErr()
}
status, _ = strconv.Atoi(c.Val())
if status < 200 || (status > 299 && status < 400) || status > 499 {
return nil, c.Err("status must be 2xx or 4xx")
}
default:
if httpserver.IfMatcherKeyword(c.Val()) {
continue block
}
return nil, c.ArgErr()
}
}
// ensure to or status is specified
if to == "" && status == 0 {
return nil, c.ArgErr()
}
if rule, err = NewComplexRule(base, pattern, to, status, ext, matcher); err != nil {
return nil, err
}
regexpRules = append(regexpRules, rule)
// the only unhandled case is 2 and above
default:
rule = NewSimpleRule(args[0], strings.Join(args[1:], " "))
simpleRules = append(simpleRules, rule)
}
}
// put simple rules in front to avoid regexp computation for them
return append(simpleRules, regexpRules...), nil
}