func gzipParse(c *Controller) ([]gzip.Config, error) {
var configs []gzip.Config
for c.Next() {
config := gzip.Config{}
// Request Filters
pathFilter := gzip.PathFilter{IgnoredPaths: make(gzip.Set)}
extFilter := gzip.ExtFilter{Exts: make(gzip.Set)}
// Response Filters
lengthFilter := gzip.LengthFilter(0)
// No extra args expected
if len(c.RemainingArgs()) > 0 {
return configs, c.ArgErr()
}
for c.NextBlock() {
switch c.Val() {
case "ext":
exts := c.RemainingArgs()
if len(exts) == 0 {
return configs, c.ArgErr()
}
for _, e := range exts {
if !strings.HasPrefix(e, ".") && e != gzip.ExtWildCard {
return configs, fmt.Errorf(`gzip: invalid extension "%v" (must start with dot)`, e)
}
extFilter.Exts.Add(e)
}
case "not":
paths := c.RemainingArgs()
if len(paths) == 0 {
return configs, c.ArgErr()
}
for _, p := range paths {
if p == "/" {
return configs, fmt.Errorf(`gzip: cannot exclude path "/" - remove directive entirely instead`)
}
if !strings.HasPrefix(p, "/") {
return configs, fmt.Errorf(`gzip: invalid path "%v" (must start with /)`, p)
}
pathFilter.IgnoredPaths.Add(p)
}
case "level":
if !c.NextArg() {
return configs, c.ArgErr()
}
level, _ := strconv.Atoi(c.Val())
config.Level = level
case "min_length":
if !c.NextArg() {
return configs, c.ArgErr()
}
length, err := strconv.ParseInt(c.Val(), 10, 64)
if err != nil {
return configs, err
} else if length == 0 {
return configs, fmt.Errorf(`gzip: min_length must be greater than 0`)
}
lengthFilter = gzip.LengthFilter(length)
default:
return configs, c.ArgErr()
}
}
// Request Filters
config.RequestFilters = []gzip.RequestFilter{}
// If ignored paths are specified, put in front to filter with path first
if len(pathFilter.IgnoredPaths) > 0 {
config.RequestFilters = []gzip.RequestFilter{pathFilter}
}
// Then, if extensions are specified, use those to filter.
// Otherwise, use default extensions filter.
if len(extFilter.Exts) > 0 {
config.RequestFilters = append(config.RequestFilters, extFilter)
} else {
config.RequestFilters = append(config.RequestFilters, gzip.DefaultExtFilter())
}
// Response Filters
// If min_length is specified, use it.
if int64(lengthFilter) != 0 {
config.ResponseFilters = append(config.ResponseFilters, lengthFilter)
}
configs = append(configs, config)
}
return configs, nil
}
