mirror of
https://github.com/vector-im/element-web.git
synced 2024-11-16 13:14:58 +08:00
109 lines
2.7 KiB
Go
109 lines
2.7 KiB
Go
// Run a web server capable of dumping bug reports sent by Riot.
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// Requires Go 1.5+
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// Usage: go run rageshake.go PORT
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// Example: go run rageshake.go 8080
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package main
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import (
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"bytes"
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"compress/gzip"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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"strconv"
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"time"
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)
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var maxPayloadSize = 1024 * 1024 * 55 // 55 MB
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type LogEntry struct {
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ID string `json:"id"`
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Lines string `json:"lines"`
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}
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type Payload struct {
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Text string `json:"text"`
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Version string `json:"version"`
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UserAgent string `json:"user_agent"`
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Logs []LogEntry `json:"logs"`
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}
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func respond(code int, w http.ResponseWriter) {
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w.WriteHeader(code)
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w.Write([]byte("{}"))
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}
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func gzipAndSave(data []byte, filepath string) error {
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if _, err := os.Stat(filepath); err == nil {
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return fmt.Errorf("file already exists") // the user can just retry
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}
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var b bytes.Buffer
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gz := gzip.NewWriter(&b)
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if _, err := gz.Write(data); err != nil {
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return err
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}
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if err := gz.Flush(); err != nil {
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return err
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}
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if err := gz.Close(); err != nil {
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return err
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}
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if err := ioutil.WriteFile(filepath, b.Bytes(), 0644); err != nil {
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return err
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}
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return nil
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}
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func main() {
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http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
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if req.Method != "POST" && req.Method != "OPTIONS" {
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respond(405, w)
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return
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}
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// Set CORS
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept")
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if req.Method == "OPTIONS" {
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respond(200, w)
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return
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}
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if length, err := strconv.Atoi(req.Header.Get("Content-Length")); err != nil || length > maxPayloadSize {
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respond(413, w)
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return
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}
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var p Payload
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if err := json.NewDecoder(req.Body).Decode(&p); err != nil {
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respond(400, w)
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return
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}
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// Dump bug report to disk as form:
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// "bugreport-20170115-112233.log.gz" => user text, version, user agent, # logs
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// "bugreport-20170115-112233-0.log.gz" => most recent log
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// "bugreport-20170115-112233-1.log.gz" => ...
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// "bugreport-20170115-112233-N.log.gz" => oldest log
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t := time.Now().UTC()
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prefix := t.Format("bugreport-20060102-150405")
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summary := fmt.Sprintf(
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"%s\n\nNumber of logs: %d\nVersion: %s\nUser-Agent: %s\n", p.Text, len(p.Logs), p.Version, p.UserAgent,
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)
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if err := gzipAndSave([]byte(summary), prefix+".log.gz"); err != nil {
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respond(500, w)
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return
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}
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for i, log := range p.Logs {
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if err := gzipAndSave([]byte(log.Lines), fmt.Sprintf("%s-%d.log.gz", prefix, i)); err != nil {
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respond(500, w)
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return // TODO: Rollback?
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}
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}
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respond(200, w)
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})
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port := os.Args[1]
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log.Fatal(http.ListenAndServe(":"+port, nil))
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}
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