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package http_proxy
import (
"bytes"
"fmt"
"io/ioutil"
"net/http"
"strings"
"github.com/elazarl/goproxy"
)
type JSResponse struct {
Status int
ContentType string
Headers string
Body string
refHash string
resp *http.Response
bodyRead bool
bodyClear bool
}
func NewJSResponse(res *http.Response) *JSResponse {
cType := ""
headers := ""
code := 200
if res != nil {
code = res.StatusCode
for name, values := range res.Header {
for _, value := range values {
headers += name + ": " + value + "\r\n"
if strings.ToLower(name) == "content-type" {
cType = value
}
}
}
}
resp := &JSResponse{
Status: code,
ContentType: cType,
Headers: headers,
resp: res,
bodyRead: false,
bodyClear: false,
}
resp.UpdateHash()
return resp
}
func (j *JSResponse) NewHash() string {
return fmt.Sprintf("%d.%s.%s", j.Status, j.ContentType, j.Headers)
}
func (j *JSResponse) UpdateHash() {
j.refHash = j.NewHash()
}
func (j *JSResponse) WasModified() bool {
if j.bodyRead {
// body was read
return true
} else if j.bodyClear {
// body was cleared manually
return true
} else if j.Body != "" {
// body was not read but just set
return true
}
// check if any of the fields has been changed
return j.NewHash() != j.refHash
}
func (j *JSResponse) GetHeader(name, deflt string) string {
headers := strings.Split(j.Headers, "\r\n")
for i := 0; i < len(headers); i++ {
if headers[i] != "" {
header_parts := header_regexp.FindAllSubmatch([]byte(headers[i]), 1)
if len(header_parts) != 0 && len(header_parts[0]) == 3 {
header_name := string(header_parts[0][1])
header_value := string(header_parts[0][2])
if strings.ToLower(name) == strings.ToLower(header_name) {
return header_value
}
}
}
}
return deflt
}
func (j *JSResponse) SetHeader(name, value string) {
name = strings.TrimSpace(name)
value = strings.TrimSpace(value)
if strings.ToLower(name) == "content-type" {
j.ContentType = value
}
headers := strings.Split(j.Headers, "\r\n")
for i := 0; i < len(headers); i++ {
if headers[i] != "" {
header_parts := header_regexp.FindAllSubmatch([]byte(headers[i]), 1)
if len(header_parts) != 0 && len(header_parts[0]) == 3 {
header_name := string(header_parts[0][1])
header_value := string(header_parts[0][2])
if strings.ToLower(name) == strings.ToLower(header_name) {
old_header := header_name + ": " + header_value + "\r\n"
new_header := name + ": " + value + "\r\n"
j.Headers = strings.Replace(j.Headers, old_header, new_header, 1)
return
}
}
}
}
j.Headers += name + ": " + value + "\r\n"
}
func (j *JSResponse) RemoveHeader(name string) {
headers := strings.Split(j.Headers, "\r\n")
for i := 0; i < len(headers); i++ {
if headers[i] != "" {
header_parts := header_regexp.FindAllSubmatch([]byte(headers[i]), 1)
if len(header_parts) != 0 && len(header_parts[0]) == 3 {
header_name := string(header_parts[0][1])
header_value := string(header_parts[0][2])
if strings.ToLower(name) == strings.ToLower(header_name) {
removed_header := header_name + ": " + header_value + "\r\n"
j.Headers = strings.Replace(j.Headers, removed_header, "", 1)
return
}
}
}
}
}
func (j *JSResponse) ClearBody() {
j.Body = ""
j.bodyClear = true
}
func (j *JSResponse) ToResponse(req *http.Request) (resp *http.Response) {
resp = goproxy.NewResponse(req, j.ContentType, j.Status, j.Body)
headers := strings.Split(j.Headers, "\r\n")
for i := 0; i < len(headers); i++ {
if headers[i] != "" {
header_parts := header_regexp.FindAllSubmatch([]byte(headers[i]), 1)
if len(header_parts) != 0 && len(header_parts[0]) == 3 {
header_name := string(header_parts[0][1])
header_value := string(header_parts[0][2])
resp.Header.Add(header_name, header_value)
}
}
}
return
}
func (j *JSResponse) ReadBody() string {
defer j.resp.Body.Close()
raw, err := ioutil.ReadAll(j.resp.Body)
if err != nil {
return ""
}
j.Body = string(raw)
j.bodyRead = true
j.bodyClear = false
// reset the response body to the original unread state
j.resp.Body = ioutil.NopCloser(bytes.NewBuffer(raw))
return j.Body
}
|
