/
parser.go
108 lines (86 loc) · 2.3 KB
/
parser.go
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package parser
import (
"bufio"
"bytes"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/http/httputil"
"strconv"
"github.com/sirupsen/logrus"
"github.com/SakiiR/ReduceRequest/internal/pkg/config"
)
// Parser parser representation
type Parser struct {
Config *config.Config
Request *http.Request
Client *http.Client
InitialResponse *http.Response
Body []byte
}
// Init parse the parser request file and store the request
func (parser *Parser) Init() error {
buf := bufio.NewReader(parser.Config.RequestFile)
req, err := http.ReadRequest(buf)
if err != nil {
logrus.Warn("Failed to read request file: '%s'", err)
return err
}
body, err := ioutil.ReadAll(buf)
if err != nil {
logrus.Warn("Failed to read body: '", err)
return err
}
req.Body = ioutil.NopCloser(bytes.NewBuffer(body))
// Fix Body Size
bodySize := getBodySize(req, body)
req.Header.Set("Content-Length", strconv.FormatInt(bodySize, 10)) //len(dec)
req.ContentLength = bodySize
parser.Body = body
req.RequestURI = ""
req.URL.Scheme = "http"
req.URL.Host = req.Host
if parser.Config.ForceSSL {
req.URL.Scheme = "https"
}
parser.Request = req
if parser.Config.Transport != nil {
parser.Client = &http.Client{Transport: parser.Config.Transport}
}
parser.InitialResponse, err = parser.Do(parser.Request)
if err != nil {
return err
}
return nil
}
func getBodySize(request *http.Request, body []byte) int64 {
buf := &bytes.Buffer{}
nRead, err := io.Copy(buf, request.Body)
if err != nil {
logrus.Warn("Failed to copy body buffer: ", err)
return 0
}
request.Body = ioutil.NopCloser(bytes.NewBuffer(body))
return nRead
}
// Do sends the request via the parser HTTP Client and return the response
func (parser *Parser) Do(request *http.Request) (*http.Response, error) {
resp, err := parser.Client.Do(request)
if err != nil {
logrus.Warn("Failed to communicate with the server: '%s'", err)
return nil, err
}
request.Body = ioutil.NopCloser(bytes.NewBuffer(parser.Body))
return resp, nil
}
// DumpRequestToStdout dumps the specified request to stdout
func DumpRequestToStdout(request *http.Request) error {
data, err := httputil.DumpRequest(request, true)
if err != nil {
logrus.Warn("Failed to dump request: %s", err)
return err
}
fmt.Println(string(data))
return nil
}