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package setup
import (
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/headers"
)
// Headers configures a new Headers middleware instance.
func Headers(c *Controller) (middleware.Middleware, error) {
rules, err := headersParse(c)
if err != nil {
return nil, err
}
return func(next middleware.Handler) middleware.Handler {
return headers.Headers{Next: next, Rules: rules}
}, nil
}
func headersParse(c *Controller) ([]headers.Rule, error) {
var rules []headers.Rule
for c.NextLine() {
var head headers.Rule
var isNewPattern bool
if !c.NextArg() {
return rules, c.ArgErr()
}
pattern := c.Val()
// See if we already have a definition for this Path pattern...
for _, h := range rules {
if h.Path == pattern {
head = h
break
}
}
// ...otherwise, this is a new pattern
if head.Path == "" {
head.Path = pattern
isNewPattern = true
}
for c.NextBlock() {
// A block of headers was opened...
h := headers.Header{Name: c.Val()}
if c.NextArg() {
h.Value = c.Val()
}
head.Headers = append(head.Headers, h)
}
if c.NextArg() {
// ... or single header was defined as an argument instead.
h := headers.Header{Name: c.Val()}
h.Value = c.Val()
if c.NextArg() {
h.Value = c.Val()
}
head.Headers = append(head.Headers, h)
}
if isNewPattern {
rules = append(rules, head)
} else {
for i := 0; i < len(rules); i++ {
if rules[i].Path == pattern {
rules[i] = head
break
}
}
}
}
return rules, nil
}
|
