94 lines
2.5 KiB
Go
94 lines
2.5 KiB
Go
// Copyright (C) 2019 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package main
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import (
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"io"
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"log"
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"net/http"
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"path"
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"strings"
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)
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type crashReceiver struct {
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store *diskStore
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sentry *sentryService
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}
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func (r *crashReceiver) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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// The final path component should be a SHA256 hash in hex, so 64 hex
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// characters. We don't care about case on the request but use lower
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// case internally.
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reportID := strings.ToLower(path.Base(req.URL.Path))
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if len(reportID) != 64 {
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http.Error(w, "Bad request", http.StatusBadRequest)
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return
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}
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for _, c := range reportID {
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if c >= 'a' && c <= 'f' {
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continue
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}
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if c >= '0' && c <= '9' {
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continue
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}
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http.Error(w, "Bad request", http.StatusBadRequest)
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return
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}
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switch req.Method {
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case http.MethodGet:
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r.serveGet(reportID, w, req)
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case http.MethodHead:
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r.serveHead(reportID, w, req)
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case http.MethodPut:
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r.servePut(reportID, w, req)
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default:
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http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
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}
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}
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// serveGet responds to GET requests by serving the uncompressed report.
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func (r *crashReceiver) serveGet(reportID string, w http.ResponseWriter, _ *http.Request) {
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bs, err := r.store.Get(reportID)
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if err != nil {
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http.Error(w, "Not found", http.StatusNotFound)
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return
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}
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w.Write(bs)
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}
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// serveHead responds to HEAD requests by checking if the named report
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// already exists in the system.
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func (r *crashReceiver) serveHead(reportID string, w http.ResponseWriter, _ *http.Request) {
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if !r.store.Exists(reportID) {
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http.Error(w, "Not found", http.StatusNotFound)
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}
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}
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// servePut accepts and stores the given report.
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func (r *crashReceiver) servePut(reportID string, w http.ResponseWriter, req *http.Request) {
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// Read at most maxRequestSize of report data.
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log.Println("Receiving report", reportID)
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lr := io.LimitReader(req.Body, maxRequestSize)
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bs, err := io.ReadAll(lr)
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if err != nil {
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log.Println("Reading report:", err)
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http.Error(w, "Internal server error", http.StatusInternalServerError)
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return
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}
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// Store the report
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if !r.store.Put(reportID, bs) {
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log.Println("Failed to store report (queue full):", reportID)
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}
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// Send the report to Sentry
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if !r.sentry.Send(reportID, bs) {
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log.Println("Failed to send report to sentry (queue full):", reportID)
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}
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}
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