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url_to_request.go
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/
url_to_request.go
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package lowhttp
import (
"bytes"
"fmt"
"github.com/yaklang/yaklang/common/log"
"io"
"net/http"
"net/http/cookiejar"
"net/url"
"strings"
"github.com/yaklang/yaklang/common/utils"
)
func NewRequestPacketFromMethod(method string, u string, originRequest []byte, originRequestHttps bool, cookies ...*http.Cookie) []byte {
originReqIns, err := ParseBytesToHttpRequest(originRequest)
if err != nil && err != io.EOF {
log.Warnf("parse origin request error: %s\n%v", err.Error(), fmt.Sprint(string(originRequest)))
}
parseReqOk := originReqIns != nil
if !utils.IsHttpOrHttpsUrl(u) {
urlIns, _ := ExtractURLFromHTTPRequest(originReqIns, originRequestHttps)
if urlIns != nil {
nu, _ := utils.UrlJoin(urlIns.String(), u)
if nu != "" {
u = nu
}
}
}
reqIns, err := http.NewRequest(method, u, http.NoBody)
if err != nil {
return nil
}
reqIns.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0")
if parseReqOk {
if len(cookies) > 0 {
cookies = append(cookies, originReqIns.Cookies()...)
} else {
cookies = originReqIns.Cookies()
}
jar, err := cookiejar.New(nil)
if err != nil {
return nil
}
jar.SetCookies(reqIns.URL, cookies)
ret := CookiesToString(jar.Cookies(reqIns.URL))
if len(ret) > 0 {
reqIns.Header.Set("Cookie", ret)
}
}
reqRaw, err := utils.HttpDumpWithBody(reqIns, true)
if err != nil {
return nil
}
return FixHTTPRequest(reqRaw)
}
func UrlToGetRequestPacket(u string, originRequest []byte, originRequestHttps bool, cookies ...*http.Cookie) []byte {
return urlToRequestPacket("GET", u, originRequest, originRequestHttps, -1, cookies...)
}
// 提取响应码以处理307和302的问题
func UrlToGetRequestPacketWithResponse(u string, originRequest, originResponse []byte, originRequestHttps bool, cookies ...*http.Cookie) []byte {
res, err := ParseBytesToHTTPResponse(originResponse)
statusCode := -1
if err == nil {
statusCode = res.StatusCode
}
return urlToRequestPacket("GET", u, originRequest, originRequestHttps, statusCode, cookies...)
}
func UrlToRequestPacket(method string, u string, originRequest []byte, originRequestHttps bool, cookies ...*http.Cookie) []byte {
return urlToRequestPacket(method, u, originRequest, originRequestHttps, -1, cookies...)
}
func urlToRequestPacket(method string, u string, originRequest []byte, https bool, responseStatusCode int, cookies ...*http.Cookie) []byte {
// 无原始请求或者303状态码,直接构造请求
if originRequest == nil || responseStatusCode == http.StatusSeeOther {
return NewRequestPacketFromMethod(method, u, originRequest, https, cookies...)
}
originReqIns, err := ParseBytesToHttpRequest(originRequest)
if err != nil {
return nil
}
// originUrl, err := ExtractURLFromHTTPRequestRaw(originRequest, https)
// if err != nil {
// return nil
// }
// originHost, _, _ := utils.ParseStringToHostPort(originUrl.String())
// currentHost, _, _ := utils.ParseStringToHostPort(u)
// inSameOrigin := originHost != "" && (strings.Contains(currentHost, originHost) || strings.Contains(originHost, currentHost))
// sameMethod := strings.ToUpper(reqIns.Method) == strings.ToUpper(method)
// 307状态码保留请求体和请求方法,改变url,添加cookie
// 302状态码在规范下也应该保留请求体和请求方法,但是实际上大部分浏览器都会改为GET请求,所以我们就不保留
if responseStatusCode == http.StatusTemporaryRedirect {
originReqIns.URL, _ = url.Parse(u)
if originReqIns.URL == nil {
return nil
}
originReqIns.Host = originReqIns.URL.Host
originReqIns.RequestURI = originReqIns.URL.RequestURI()
if len(cookies) > 0 {
jar, err := cookiejar.New(nil)
if err != nil {
return nil
}
jar.SetCookies(originReqIns.URL, append(originReqIns.Cookies(), cookies...))
res := CookiesToString(jar.Cookies(originReqIns.URL))
if len(res) > 0 {
originReqIns.Header.Set("Cookie", res)
}
}
raw, err := utils.HttpDumpWithBody(originReqIns, true)
if err != nil {
return nil
}
return raw
}
return NewRequestPacketFromMethod(method, u, originRequest, https, cookies...)
}
func UrlToHTTPRequest(text string) ([]byte, error) {
var r *http.Request
if !(strings.HasPrefix(text, "http://") || strings.HasPrefix(text, "https://")) {
text = "http://" + text
}
u, err := url.Parse(text)
if err != nil {
return nil, err
}
r, err = http.NewRequest("GET", text, http.NoBody)
if err != nil {
return nil, err
}
if u.RawPath == "" && u.Path == "" {
u.Path = "/"
}
if u.RawPath != "" {
r.RequestURI = u.RawPath
} else {
r.RequestURI = u.Path
}
if u.RawQuery != "" {
r.RequestURI += "?" + u.RawQuery
}
if u.Fragment != "" {
if u.RawFragment != "" {
r.RequestURI += "#" + u.RawFragment
} else {
r.RequestURI += "#" + url.PathEscape(u.Fragment)
}
}
if strings.HasSuffix(text, "#") && u.Fragment == "" {
r.RequestURI += "#"
}
raw := simpleDumpHTTPRequest(r)
raw = FixHTTPRequest(raw)
return raw, nil
}
func simpleDumpHTTPRequest(r *http.Request) []byte {
var buf bytes.Buffer
buf.WriteString(r.Method)
buf.WriteString(" ")
buf.WriteString(r.RequestURI)
buf.WriteString(" ")
r.Proto = fmt.Sprint("HTTP/", r.ProtoMajor, ".", r.ProtoMinor)
buf.WriteString(r.Proto)
buf.WriteString(CRLF)
// handle host
buf.WriteString("Host: ")
if r.Host != "" {
buf.WriteString(r.Host)
} else if r.URL.Host != "" {
buf.WriteString(r.URL.Host)
}
buf.WriteString(CRLF)
return buf.Bytes()
}