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package http2curl
import (
"bytes"
"fmt"
"io/ioutil"
"net/http"
"sort"
"strings"
)
// CurlCommand contains exec.Command compatible slice + helpers
type CurlCommand []string
// append appends a string to the CurlCommand
func (c *CurlCommand) append(newSlice ...string) {
*c = append(*c, newSlice...)
}
// String returns a ready to copy/paste command
func (c *CurlCommand) String() string {
return strings.Join(*c, " ")
}
func bashEscape(str string) string {
return `'` + strings.Replace(str, `'`, `'\''`, -1) + `'`
}
// GetCurlCommand returns a CurlCommand corresponding to an http.Request
func GetCurlCommand(req *http.Request) (*CurlCommand, error) {
if req.URL == nil {
return nil, fmt.Errorf("getCurlCommand: invalid request, req.URL is nil")
}
command := CurlCommand{}
command.append("curl")
schema := req.URL.Scheme
requestURL := req.URL.String()
if schema == "" {
schema = "http"
if req.TLS != nil {
schema = "https"
}
requestURL = schema + "://" + req.Host + req.URL.Path
}
if schema == "https" {
command.append("-k")
}
command.append("-X", bashEscape(req.Method))
if req.Body != nil {
var buff bytes.Buffer
_, err := buff.ReadFrom(req.Body)
if err != nil {
return nil, fmt.Errorf("getCurlCommand: buffer read from body error: %w", err)
}
// reset body for potential re-reads
req.Body = ioutil.NopCloser(bytes.NewBuffer(buff.Bytes()))
if len(buff.String()) > 0 {
bodyEscaped := bashEscape(buff.String())
command.append("-d", bodyEscaped)
}
}
var keys []string
for k := range req.Header {
keys = append(keys, k)
}
sort.Strings(keys)
for _, k := range keys {
command.append("-H", bashEscape(fmt.Sprintf("%s: %s", k, strings.Join(req.Header[k], " "))))
}
command.append(bashEscape(requestURL))
return &command, nil
}
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