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setup.go
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setup.go
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package fastcgi
import (
"errors"
"net/http"
"path/filepath"
"strconv"
"github.com/mholt/caddy"
"github.com/mholt/caddy/caddyhttp/httpserver"
)
func init() {
caddy.RegisterPlugin("fastcgi", caddy.Plugin{
ServerType: "http",
Action: setup,
})
}
// setup configures a new FastCGI middleware instance.
func setup(c *caddy.Controller) error {
cfg := httpserver.GetConfig(c)
absRoot, err := filepath.Abs(cfg.Root)
if err != nil {
return err
}
rules, err := fastcgiParse(c)
if err != nil {
return err
}
cfg.AddMiddleware(func(next httpserver.Handler) httpserver.Handler {
return Handler{
Next: next,
Rules: rules,
Root: cfg.Root,
AbsRoot: absRoot,
FileSys: http.Dir(cfg.Root),
SoftwareName: caddy.AppName,
SoftwareVersion: caddy.AppVersion,
ServerName: cfg.Addr.Host,
ServerPort: cfg.Addr.Port,
}
})
return nil
}
func fastcgiParse(c *caddy.Controller) ([]Rule, error) {
var rules []Rule
for c.Next() {
var rule Rule
args := c.RemainingArgs()
switch len(args) {
case 0:
return rules, c.ArgErr()
case 1:
rule.Path = "/"
rule.Address = args[0]
case 2:
rule.Path = args[0]
rule.Address = args[1]
case 3:
rule.Path = args[0]
rule.Address = args[1]
err := fastcgiPreset(args[2], &rule)
if err != nil {
return rules, c.Err("Invalid fastcgi rule preset '" + args[2] + "'")
}
}
network, address := parseAddress(rule.Address)
rule.dialer = basicDialer{network: network, address: address}
for c.NextBlock() {
switch c.Val() {
case "ext":
if !c.NextArg() {
return rules, c.ArgErr()
}
rule.Ext = c.Val()
case "split":
if !c.NextArg() {
return rules, c.ArgErr()
}
rule.SplitPath = c.Val()
case "index":
args := c.RemainingArgs()
if len(args) == 0 {
return rules, c.ArgErr()
}
rule.IndexFiles = args
case "env":
envArgs := c.RemainingArgs()
if len(envArgs) < 2 {
return rules, c.ArgErr()
}
rule.EnvVars = append(rule.EnvVars, [2]string{envArgs[0], envArgs[1]})
case "except":
ignoredPaths := c.RemainingArgs()
if len(ignoredPaths) == 0 {
return rules, c.ArgErr()
}
rule.IgnoredSubPaths = ignoredPaths
case "pool":
if !c.NextArg() {
return rules, c.ArgErr()
}
pool, err := strconv.Atoi(c.Val())
if err != nil {
return rules, err
}
if pool >= 0 {
rule.dialer = &persistentDialer{size: pool, network: network, address: address}
} else {
return rules, c.Errf("positive integer expected, found %d", pool)
}
}
}
rules = append(rules, rule)
}
return rules, nil
}
// fastcgiPreset configures rule according to name. It returns an error if
// name is not a recognized preset name.
func fastcgiPreset(name string, rule *Rule) error {
switch name {
case "php":
rule.Ext = ".php"
rule.SplitPath = ".php"
rule.IndexFiles = []string{"index.php"}
default:
return errors.New(name + " is not a valid preset name")
}
return nil
}