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resp.go
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resp.go
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package req
import (
"encoding/json"
"encoding/xml"
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"regexp"
"time"
)
// Resp represents a request with it's response
type Resp struct {
r *Req
req *http.Request
resp *http.Response
client *http.Client
*multipartHelper
reqBody []byte
respBody []byte
downloadProgress DownloadProgress
err error // delayed error
}
// Request returns *http.Request
func (r *Resp) Request() *http.Request {
return r.req
}
// Response returns *http.Response
func (r *Resp) Response() *http.Response {
return r.resp
}
// Bytes returns response body as []byte
func (r *Resp) Bytes() []byte {
data, _ := r.ToBytes()
return data
}
// ToBytes returns response body as []byte,
// return error if error happend when reading
// the response body
func (r *Resp) ToBytes() ([]byte, error) {
if r.err != nil {
return nil, r.err
}
if r.respBody != nil {
return r.respBody, nil
}
defer r.resp.Body.Close()
respBody, err := ioutil.ReadAll(r.resp.Body)
if err != nil {
r.err = err
return nil, err
}
r.respBody = respBody
return r.respBody, nil
}
// String returns response body as string
func (r *Resp) String() string {
data, _ := r.ToBytes()
return string(data)
}
// ToString returns response body as string,
// return error if error happend when reading
// the response body
func (r *Resp) ToString() (string, error) {
data, err := r.ToBytes()
return string(data), err
}
// ToJSON convert json response body to struct or map
func (r *Resp) ToJSON(v interface{}) error {
data, err := r.ToBytes()
if err != nil {
return err
}
return json.Unmarshal(data, v)
}
// ToXML convert xml response body to struct or map
func (r *Resp) ToXML(v interface{}) error {
data, err := r.ToBytes()
if err != nil {
return err
}
return xml.Unmarshal(data, v)
}
// ToFile download the response body to file with optional download callback
func (r *Resp) ToFile(name string) error {
//TODO set name to the suffix of url path if name == ""
file, err := os.Create(name)
if err != nil {
return err
}
defer file.Close()
if r.respBody != nil {
_, err = file.Write(r.respBody)
return err
}
if r.downloadProgress != nil && r.resp.ContentLength > 0 {
return r.download(file)
}
defer r.resp.Body.Close()
_, err = io.Copy(file, r.resp.Body)
return err
}
func (r *Resp) download(file *os.File) error {
p := make([]byte, 1024)
b := r.resp.Body
defer b.Close()
total := r.resp.ContentLength
var current int64
var lastTime time.Time
for {
l, err := b.Read(p)
if l > 0 {
_, _err := file.Write(p[:l])
if _err != nil {
return _err
}
current += int64(l)
if now := time.Now(); now.Sub(lastTime) > 200*time.Millisecond {
lastTime = now
r.downloadProgress(current, total)
}
}
if err != nil {
if err == io.EOF {
return nil
}
return err
}
}
}
var regNewline = regexp.MustCompile(`\n|\r`)
func (r *Resp) autoFormat(s fmt.State) {
req := r.req
fmt.Fprint(s, req.Method, " ", req.URL.String())
// test if it is should be outputed pretty
var pretty bool
var parts []string
addPart := func(part string) {
if part == "" {
return
}
parts = append(parts, part)
if !pretty && regNewline.MatchString(part) {
pretty = true
}
}
if r.r.flag&LreqBody != 0 { // request body
addPart(string(r.reqBody))
}
if r.r.flag&LrespBody != 0 { // response body
addPart(r.String())
}
for _, part := range parts {
if pretty {
fmt.Fprint(s, "\n")
}
fmt.Fprint(s, " ", part)
}
}
func (r *Resp) miniFormat(s fmt.State) {
req := r.req
fmt.Fprint(s, req.Method, " ", req.URL.String())
if r.r.flag&LreqBody != 0 && len(r.reqBody) > 0 { // request body
str := regNewline.ReplaceAllString(string(r.reqBody), " ")
fmt.Fprint(s, " ", str)
}
if r.r.flag&LrespBody != 0 && r.String() != "" { // response body
str := regNewline.ReplaceAllString(r.String(), " ")
fmt.Fprint(s, " ", str)
}
}
func (r *Resp) Format(s fmt.State, verb rune) {
if r == nil || r.req == nil {
return
}
if s.Flag('+') { // include header and format pretty.
fmt.Fprint(s, r.Dump())
} else if s.Flag('-') { // keep all informations in one line.
r.miniFormat(s)
} else { // auto
r.autoFormat(s)
}
}