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util.go
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util.go
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package ghttp
import (
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"reflect"
"strconv"
"unsafe"
"github.com/winterssy/gjson"
)
type (
// H is an alias of gjson.Object.
// Visit https://github.com/winterssy/gjson for more details.
H = gjson.Object
)
func b2s(b []byte) string {
return *(*string)(unsafe.Pointer(&b))
}
func toString(v interface{}) string {
switch v := v.(type) {
case string:
return v
case []byte:
return b2s(v)
case bool:
return strconv.FormatBool(v)
case float32:
return strconv.FormatFloat(float64(v), 'f', -1, 32)
case float64:
return strconv.FormatFloat(v, 'f', -1, 64)
case int:
return strconv.FormatInt(int64(v), 10)
case int8:
return strconv.FormatInt(int64(v), 10)
case int16:
return strconv.FormatInt(int64(v), 10)
case int32:
return strconv.FormatInt(int64(v), 10)
case int64:
return strconv.FormatInt(v, 10)
case uint:
return strconv.FormatUint(uint64(v), 10)
case uint8:
return strconv.FormatUint(uint64(v), 10)
case uint16:
return strconv.FormatUint(uint64(v), 10)
case uint32:
return strconv.FormatUint(uint64(v), 10)
case uint64:
return strconv.FormatUint(v, 10)
case error:
return v.Error()
case interface {
String() string
}:
return v.String()
}
panic(fmt.Errorf("ghttp: can't cast %#v of type %[1]T to string", v))
}
func toStrings(v interface{}) (vs []string) {
defer func() {
if err := recover(); err != nil {
log.Print(err)
vs = nil // ignore this field
}
}()
switch v := v.(type) {
case []string:
vs = make([]string, len(v))
copy(vs, v)
case string, []byte,
bool,
float32, float64,
int, int8, int16, int32, int64,
uint, uint8, uint16, uint32, uint64,
error,
interface {
String() string
}:
vs = []string{toString(v)}
default:
rv := reflect.ValueOf(v)
switch rv.Kind() {
case reflect.Slice, reflect.Array:
n := rv.Len()
vs = make([]string, 0, n)
for i := 0; i < n; i++ {
vs = append(vs, toString(rv.Index(i).Interface()))
}
}
}
return
}
func toReadCloser(r io.Reader) io.ReadCloser {
rc, ok := r.(io.ReadCloser)
if !ok && r != nil {
rc = ioutil.NopCloser(r)
}
return rc
}
// Report whether an HTTP request or response body is empty.
func bodyEmpty(body io.ReadCloser) bool {
return body == nil || body == http.NoBody
}
func drainBody(body io.ReadCloser, w io.Writer) (err error) {
defer body.Close()
_, err = io.Copy(w, body)
return
}
func findCookie(name string, cookies []*http.Cookie) (*http.Cookie, error) {
for _, cookie := range cookies {
if cookie.Name == name {
return cookie, nil
}
}
return nil, http.ErrNoCookie
}
// Return value if nonempty, def otherwise.
func valueOrDefault(value, def string) string {
if value != "" {
return value
}
return def
}