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received_request.go
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received_request.go
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package awsmocker
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"regexp"
"strings"
)
var (
credExtractRegexp = regexp.MustCompile(`Credential=(\S+)\b`)
jsonRegexp = regexp.MustCompile(`json`)
)
type ReceivedRequest struct {
HttpRequest *http.Request
Action string
Service string
Region string
Hostname string
Path string
// The expected response type based upon the request. JSON requests answered with JSON,
// form param posts respond with XML
AssumedResponseType string
// This will only be populated if the request was NOT a form
RawBody []byte
// If the request was a JSON request, then this will be the parsed JSON
JsonPayload any
// TBA: maybe in the future we'll add invalid request flagging, for now allow all types
// invalid bool
}
func (rr *ReceivedRequest) Inspect() string {
if rr.Action != "" && rr.Service != "" {
return rr.Service + ":" + rr.Action
}
return fmt.Sprintf("%s %s/%s", rr.HttpRequest.Method, rr.Hostname, rr.Path)
}
func newReceivedRequest(req *http.Request) *ReceivedRequest {
recvreq := &ReceivedRequest{
HttpRequest: req,
AssumedResponseType: ContentTypeText,
Hostname: req.URL.Hostname(),
Path: req.URL.Path,
}
_ = req.ParseForm()
bodyBytes, err := io.ReadAll(req.Body)
if err == nil {
recvreq.RawBody = bodyBytes
}
reqContentType := req.Header.Get("content-type")
if jsonRegexp.MatchString(reqContentType) {
recvreq.AssumedResponseType = ContentTypeJSON
if len(bodyBytes) > 0 {
var jsonData any
if err := json.Unmarshal(bodyBytes, &jsonData); err == nil {
recvreq.JsonPayload = jsonData
}
}
}
authHeader := req.Header.Get("authorization")
if authHeader != "" {
matches := credExtractRegexp.FindStringSubmatch(authHeader)
if len(matches) > 1 {
// 0 1 2 3 4
// fake/20221030/us-east-1/ecs/aws4_request
parts := strings.Split(matches[1], "/")
recvreq.Region = parts[2]
recvreq.Service = parts[3]
}
}
amzTarget := req.Header.Get("x-amz-target")
if amzTarget != "" {
// X-Amz-Target: AmazonEC2ContainerServiceV20141113.ListClusters
_, opname, ok := strings.Cut(amzTarget, ".")
if ok {
recvreq.Action = opname
}
}
if recvreq.Action == "" && req.PostForm.Has("Action") {
recvreq.Action = req.PostForm.Get("Action")
}
if recvreq.AssumedResponseType == ContentTypeText && recvreq.Action != "" && recvreq.Service != "" && reqContentType == "application/x-www-form-urlencoded" {
recvreq.AssumedResponseType = ContentTypeXML
}
// if recvreq.Action == "" {
// log.Println("WARN: Received a request with no action????")
// recvreq.invalid = true
// return recvreq
// }
return recvreq
}
func (r *ReceivedRequest) DebugDump() {
// var buf *bytes.Buffer
buf := new(bytes.Buffer)
fmt.Fprintln(buf, "--- AWSMOCKER RECEIVED REQUEST: -----------------------")
if r.Action != "" || r.Service != "" {
fmt.Fprintf(buf, "Operation: %s (service=%s @ %s)\n", r.Action, r.Service, r.Region)
}
fmt.Fprintf(buf, "%s %s\n", r.HttpRequest.Method, r.HttpRequest.RequestURI)
fmt.Fprintf(buf, "Host: %s\n", r.HttpRequest.Host)
for k, vlist := range r.HttpRequest.Header {
for _, v := range vlist {
fmt.Fprintf(buf, "%s: %s\n", k, v)
}
}
fmt.Fprintln(buf)
if len(r.RawBody) > 0 {
fmt.Fprintln(buf, "BODY:")
fmt.Fprintln(buf, string(r.RawBody))
} else if r.HttpRequest.Form != nil && len(r.HttpRequest.Form) > 0 {
fmt.Fprintln(buf, "PARAMS:")
for k, vlist := range r.HttpRequest.Form {
for _, v := range vlist {
fmt.Fprintf(buf, " %s=%s\n", k, v)
}
}
}
fmt.Fprintln(buf, "-------------------------------------------------------")
fmt.Fprintln(buf)
_, _ = buf.WriteTo(DebugOutputWriter)
}