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/*
* This file is part of caronte (https://github.com/eciavatta/caronte).
* Copyright (c) 2020 Emiliano Ciavatta.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package parsers
import (
"bufio"
"bytes"
"compress/gzip"
log "github.com/sirupsen/logrus"
"io/ioutil"
"net/http"
)
type HTTPResponseMetadata struct {
BasicMetadata
Status string `json:"status"`
StatusCode int `json:"status_code"`
Protocol string `json:"protocol"`
Headers map[string]string `json:"headers"`
ConnectionClosed bool `json:"connection_closed"`
Cookies map[string]string `json:"cookies" binding:"omitempty"`
Location string `json:"location" binding:"omitempty"`
Compressed bool `json:"compressed"`
Body string `json:"body" binding:"omitempty"`
Trailer map[string]string `json:"trailer" binding:"omitempty"`
}
type HTTPResponseParser struct {
}
func (p HTTPResponseParser) TryParse(content []byte) Metadata {
reader := bufio.NewReader(bytes.NewReader(content))
response, err := http.ReadResponse(reader, nil)
if err != nil {
return nil
}
var body string
var compressed bool
switch response.Header.Get("Content-Encoding") {
case "gzip":
if gzipReader, err := gzip.NewReader(response.Body); err == nil {
if buffer, err := ioutil.ReadAll(gzipReader); err == nil {
body = string(buffer)
compressed = true
} else {
log.WithError(err).Error("failed to read gzipped body in http_response_parser")
return nil
}
_ = gzipReader.Close()
}
default:
if buffer, err := ioutil.ReadAll(response.Body); err == nil {
body = string(buffer)
} else {
log.WithError(err).Error("failed to read body in http_response_parser")
return nil
}
}
_ = response.Body.Close()
var location string
if locationURL, err := response.Location(); err == nil {
location = locationURL.String()
}
return HTTPResponseMetadata{
BasicMetadata: BasicMetadata{"http-response"},
Status: response.Status,
StatusCode: response.StatusCode,
Protocol: response.Proto,
Headers: JoinArrayMap(response.Header),
ConnectionClosed: response.Close,
Cookies: CookiesMap(response.Cookies()),
Location: location,
Compressed: compressed,
Body: body,
Trailer: JoinArrayMap(response.Trailer),
}
}
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