element-web/scripts/rageshake.go
2017-02-06 14:56:06 +00:00

109 lines
2.8 KiB
Go

// Run a web server capable of dumping bug reports sent by Riot.
// Requires Go 1.5+
// Usage: go run rageshake.go PORT
// Example: go run rageshake.go 8080
package main
import (
"bytes"
"compress/gzip"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"strconv"
"time"
)
var maxPayloadSize = 1024 * 1024 * 55 // 55 MB
type LogEntry struct {
ID string `json:"id"`
Lines string `json:"lines"`
}
type Payload struct {
Text string `json:"text"`
Version string `json:"version"`
UserAgent string `json:"user_agent"`
Logs []LogEntry `json:"logs"`
}
func respond(code int, w http.ResponseWriter) {
w.WriteHeader(code)
w.Write([]byte("{}"))
}
func gzipAndSave(data []byte, filepath string) error {
filepath = "bugs/" + filepath
if _, err := os.Stat(filepath); err == nil {
return fmt.Errorf("file already exists") // the user can just retry
}
var b bytes.Buffer
gz := gzip.NewWriter(&b)
if _, err := gz.Write(data); err != nil {
return err
}
if err := gz.Flush(); err != nil {
return err
}
if err := gz.Close(); err != nil {
return err
}
if err := ioutil.WriteFile(filepath, b.Bytes(), 0644); err != nil {
return err
}
return nil
}
func main() {
http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
if req.Method != "POST" && req.Method != "OPTIONS" {
respond(405, w)
return
}
// Set CORS
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS")
w.Header().Set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept")
if req.Method == "OPTIONS" {
respond(200, w)
return
}
if length, err := strconv.Atoi(req.Header.Get("Content-Length")); err != nil || length > maxPayloadSize {
respond(413, w)
return
}
var p Payload
if err := json.NewDecoder(req.Body).Decode(&p); err != nil {
respond(400, w)
return
}
// Dump bug report to disk as form:
// "bugreport-20170115-112233.log.gz" => user text, version, user agent, # logs
// "bugreport-20170115-112233-0.log.gz" => most recent log
// "bugreport-20170115-112233-1.log.gz" => ...
// "bugreport-20170115-112233-N.log.gz" => oldest log
t := time.Now().UTC()
prefix := t.Format("bugreport-20060102-150405")
summary := fmt.Sprintf(
"%s\n\nNumber of logs: %d\nVersion: %s\nUser-Agent: %s\n", p.Text, len(p.Logs), p.Version, p.UserAgent,
)
if err := gzipAndSave([]byte(summary), prefix+".log.gz"); err != nil {
respond(500, w)
return
}
for i, log := range p.Logs {
if err := gzipAndSave([]byte(log.Lines), fmt.Sprintf("%s-%d.log.gz", prefix, i)); err != nil {
respond(500, w)
return // TODO: Rollback?
}
}
respond(200, w)
})
port := os.Args[1]
log.Fatal(http.ListenAndServe(":"+port, nil))
}