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|
package store
import (
"encoding/json"
"fmt"
"net"
"net/http"
"net/url"
"strings"
"time"
)
// HAR 1.2 — https://w3c.github.io/web-performance/specs/HAR/Overview.html
type HAR struct {
Log HARLog `json:"log"`
}
type HARLog struct {
Version string `json:"version"`
Creator HARCreator `json:"creator"`
Entries []HAREntry `json:"entries"`
}
type HARCreator struct {
Name string `json:"name"`
Version string `json:"version"`
}
type HAREntry struct {
StartedDateTime string `json:"startedDateTime"`
Time int64 `json:"time"`
Request HARRequest `json:"request"`
Response HARResponse `json:"response"`
Timings HARTimings `json:"timings"`
}
type HARRequest struct {
Method string `json:"method"`
URL string `json:"url"`
HTTPVersion string `json:"httpVersion"`
Headers []HARNameValue `json:"headers"`
QueryString []HARNameValue `json:"queryString"`
PostData *HARPostData `json:"postData,omitempty"`
HeadersSize int `json:"headersSize"`
BodySize int `json:"bodySize"`
}
type HARResponse struct {
Status int `json:"status"`
StatusText string `json:"statusText"`
HTTPVersion string `json:"httpVersion"`
Headers []HARNameValue `json:"headers"`
Content HARContent `json:"content"`
RedirectURL string `json:"redirectURL"`
HeadersSize int `json:"headersSize"`
BodySize int `json:"bodySize"`
}
type HARNameValue struct {
Name string `json:"name"`
Value string `json:"value"`
}
type HARPostData struct {
MimeType string `json:"mimeType"`
Text string `json:"text"`
}
type HARContent struct {
Size int `json:"size"`
MimeType string `json:"mimeType"`
Text string `json:"text,omitempty"`
}
type HARTimings struct {
Send int64 `json:"send"`
Wait int64 `json:"wait"`
Receive int64 `json:"receive"`
}
// ExportHAR serialises the given transactions into a HAR 1.2 JSON byte slice.
// Pass only the transactions you want exported — scope and out-of-scope
// filtering is the caller's responsibility.
func ExportHAR(txs []Transaction) ([]byte, error) {
har := HAR{
Log: HARLog{
Version: "1.2",
Creator: HARCreator{
Name: "Shiv",
Version: "1.0",
},
Entries: make([]HAREntry, 0, len(txs)),
},
}
for _, tx := range txs {
entry := HAREntry{
StartedDateTime: tx.Timestamp.UTC().Format(time.RFC3339),
Time: tx.DurationMs,
Request: buildHARRequest(tx),
Response: buildHARResponse(tx),
Timings: HARTimings{
Send: 0,
Wait: tx.DurationMs,
Receive: 0,
},
}
har.Log.Entries = append(har.Log.Entries, entry)
}
data, err := json.MarshalIndent(har, "", " ")
if err != nil {
return nil, fmt.Errorf("har: marshal: %w", err)
}
return data, nil
}
func stripDefaultPort(rawURL string) string {
for _, prefix := range []string{"https://", "http://"} {
if !strings.HasPrefix(rawURL, prefix) {
continue
}
rest := rawURL[len(prefix):]
slash := strings.Index(rest, "/")
if slash < 0 {
slash = len(rest)
}
host := rest[:slash]
path := rest[slash:]
h, port, err := net.SplitHostPort(host)
if err != nil {
return rawURL
}
if (prefix == "https://" && port == "443") || (prefix == "http://" && port == "80") {
return prefix + h + path
}
return rawURL
}
return rawURL
}
func buildHARRequest(tx Transaction) HARRequest {
headers := make([]HARNameValue, 0, len(tx.ReqHeaders))
for k, vals := range tx.ReqHeaders {
for _, v := range vals {
headers = append(headers, HARNameValue{Name: k, Value: v})
}
}
httpVersion := tx.Proto
if httpVersion == "" {
httpVersion = "HTTP/1.1"
}
req := HARRequest{
Method: tx.Method,
URL: stripDefaultPort(tx.URL),
HTTPVersion: httpVersion,
Headers: headers,
QueryString: extractQueryString(tx.URL),
HeadersSize: -1,
BodySize: len(tx.ReqBody),
}
if len(tx.ReqBody) > 0 {
mimeType := tx.ReqHeaders.Get("Content-Type")
if mimeType == "" {
mimeType = "application/octet-stream"
}
req.PostData = &HARPostData{
MimeType: mimeType,
Text: string(tx.ReqBody),
}
}
return req
}
func buildHARResponse(tx Transaction) HARResponse {
headers := make([]HARNameValue, 0, len(tx.RespHeaders))
for k, vals := range tx.RespHeaders {
for _, v := range vals {
headers = append(headers, HARNameValue{Name: k, Value: v})
}
}
httpVersion := tx.Proto
if httpVersion == "" {
httpVersion = "HTTP/1.1"
}
mimeType := tx.RespHeaders.Get("Content-Type")
if mimeType == "" {
mimeType = "application/octet-stream"
}
redirectURL := tx.RespHeaders.Get("Location")
return HARResponse{
Status: tx.StatusCode,
StatusText: statusText(tx.StatusCode),
HTTPVersion: httpVersion,
Headers: headers,
Content: HARContent{
Size: len(tx.RespBody),
MimeType: mimeType,
Text: string(tx.RespBody),
},
RedirectURL: redirectURL,
HeadersSize: -1,
BodySize: len(tx.RespBody),
}
}
func extractQueryString(rawURL string) []HARNameValue {
idx := strings.Index(rawURL, "?")
if idx < 0 {
return []HARNameValue{}
}
parsed, err := url.ParseQuery(rawURL[idx+1:])
if err != nil || len(parsed) == 0 {
return []HARNameValue{}
}
pairs := make([]HARNameValue, 0, len(parsed))
for k, vals := range parsed {
for _, v := range vals {
pairs = append(pairs, HARNameValue{Name: k, Value: v})
}
}
return pairs
}
func statusText(code int) string {
if t := http.StatusText(code); t != "" {
return t
}
return fmt.Sprintf("%d", code)
}
|
